근거 기록 467건

intel/ipu6-camera-hal / modules/v4l2/v4l2_device.h / CROS_CAMERA_EXPORT / L260-L290

) in case of flush request, i.e., to abort poll before timeout explicit V4L2DevicePoller(const std::vector<V4L2De

• 기술 영역v4l2
• 문제timeout

관측 시점 2024-07-18T14:37:27+08:00 · 최초 발견 commit a354967a6a

intel/ipu6-camera-hal / include/linux/v4l2-controls.h / v4l2_colorfx / L85-L106

define V4L2_CID_HUE_AUTO (V4L2_CID_BASE + 25) define V4L2_CID_WHITE_BALANCE_TEMPERATURE (V4L2_CID_BASE + 26) WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS define V4L2_CID_SHARPNESS (V4L2_CID_BASE + 27) define V4L2_CID_BACKLIGHT_COMPENSATION (V4L2_CID_BASE + 28) define V4L2_CID_CHROMA_AGC (V4L2_C…

• 기술 영역v4l2, white balance, sharpness, agc
• 메커니즘compensat

관측 시점 2020-10-21T06:15:07+08:00 · 최초 발견 commit 45469119a4

intel/ipu6-camera-hal / include/linux/v4l2-controls.h / v4l2_mpeg_video_h264_profile / L437-L460

define V4L2_CID_MPEG_VIDEO_H264_PROFILE (V4L2_CID_MPEG_BASE + 363)

• 기술 영역v4l2, profil
• 메커니즘predict
• 평가baseline

관측 시점 2020-10-21T06:15:07+08:00 · 최초 발견 commit 45469119a4

intel/ipu6-camera-hal / include/linux/v4l2-controls.h / v4l2_vp8_num_partitions / L574-L580

define V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (V4L2_CID_MPEG_BASE + 407) define V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS (V4L2_CID_MPEG_BASE + 500) WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS

• 기술 영역v4l2
• 메커니즘partition

관측 시점 2020-10-21T06:15:07+08:00 · 최초 발견 commit 45469119a4

intel/ipu6-camera-hal / include/linux/v4l2-controls.h / v4l2_exposure_auto_type / L689-L695

define V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (V4L2_CID_MPEG_MFC51_BASE + 5) define V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (V4L2_CID_MPEG_MFC51_BASE + 6) define V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (V4L2_CID_MPEG_MFC51_BASE + 7) WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS define V…

• 기술 영역v4l2
• 메커니즘adaptive

관측 시점 2020-10-21T06:15:07+08:00 · 최초 발견 commit 45469119a4

intel/ipu6-camera-hal / include/api/Parameters.h / camera_stream_configuration_mode_t / L384-L495

camera_stream_configuration_mode_t: This defines the general operation mode for the HAL (for a given stream configuration), where modes besides NORMAL have different semantics, and usually the generality of the APIs are limited in exchange for higher performance in some particular area.

• 기술 영역stream configuration, fps
• 메커니즘characteris

관측 시점 2024-09-27T16:18:38+08:00 · 최초 발견 commit b2a63627f9

intel/ipu6-camera-hal / include/api/Parameters.h / Parameters / L1135-L2949

\class Parameters \brief Manage parameter's data structure, and provide set and get parameters This class provides a thread safe management to internal parameter's data structure, and helps client to easily set parameters to and get parameters from camera device. \version 0.1

• 기술 영역fps, exposure time
• 메커니즘compensat

관측 시점 2024-09-27T16:18:38+08:00 · 최초 발견 commit b2a63627f9

intel/ipu6-camera-hal / src/metadata/icamera_metadata_tags.h / icamera_metadata_tag_t / L110-L447

Main enum for defining camera metadata tags. New entries must always go before the section _END tag to preserve existing enumeration values. In addition, the name and type of the tag needs to be added to src/metadata/icamera_metadata_tag_info.c

• 기술 영역fps, awb
• 메커니즘compensat

관측 시점 2022-08-09T12:22:48+08:00 · 최초 발견 commit 6042cca6df

intel/ipu6-camera-hal / src/metadata/icamera_metadata_tags.h / icamera_metadata_tag / L110-L447

Main enum for defining camera metadata tags. New entries must always go before the section _END tag to preserve existing enumeration values. In addition, the name and type of the tag needs to be added to src/metadata/icamera_metadata_tag_info.c

• 기술 영역fps, awb
• 메커니즘compensat

관측 시점 2022-08-09T12:22:48+08:00 · 최초 발견 commit 6042cca6df

intel/ipu6-camera-hal / src/metadata/ParameterGenerator.h / icamera / L25-L114

include "Parameters.h" include "iutils/Thread.h"

• 기술 영역3a, awb
• 메커니즘predict
• 효과save

관측 시점 2023-09-22T17:58:18+08:00 · 최초 발견 commit 661e80b0b2

intel/ipu6-camera-hal / src/metadata/ParameterGenerator.h / ParameterGenerator / L48-L112

\class ParameterGenerator This class is used to generator parameter results. It updates the parameters with AIQ results, sensor embedded metadata and 3A statistics. The parameter results are stored with the frame sequence indicating on which frame the parameters are active.

• 기술 영역3a, awb
• 메커니즘predict
• 효과save

관측 시점 2023-09-22T17:58:18+08:00 · 최초 발견 commit 661e80b0b2

intel/ipu6-camera-hal / src/metadata/icamera_metadata_base.cpp / validate_icamera_metadata_structure / L280-L410

; if (entries_end < metadata->entries_start || // overflow check entries_end > metadata->data_start) {

• 기술 영역camera_metadata
• 문제overflow

관측 시점 2022-08-09T12:22:48+08:00 · 최초 발견 commit 6042cca6df

intel/ipu6-camera-hal / src/metadata/icamera_metadata_tag_info.c / icamera_metadata_enum_snprint / L532-L2696

} break; } case CAMERA_AE_COMPENSATION: { break; } case CAMERA_AE

• 기술 영역fps
• 메커니즘compensat

관측 시점 2020-10-21T06:15:07+08:00 · 최초 발견 commit 45469119a4

intel/ipu6-camera-hal / src/metadata/ParameterGenerator.cpp / ParameterGenerator::updateCommonMetadata / L466-L670

entry); entry.tag = CAMERA_SENSOR_ROLLING_SHUTTER_SKEW; entry.type = ICAMERA_TYPE_INT64; entry.count

• 기술 영역rolling shutter, binning, sensor mode, camera_metadata
• 문제skew

관측 시점 2025-04-27T14:21:24+08:00 · 최초 발견 commit 76ae3ee076

intel/ipu6-camera-hal / src/iutils/Utils.cpp / CameraUtils::getFrameSize / L537-L568

Why alignment is 64? The IPU DMA unit must transimit at leat 64 bytes one time. Why need extra size? It's due to a hardware issue: the DMA unit is a power of two, and a line should be transferred as few units as possible. The result is that up to line length more data than the image size may be transferred to memory a…

• 기술 영역line length
• 문제corrupt
• 효과avoid

intel/ipu6-camera-hal / src/image_process/PostProcessorBase.cpp / JpegProcess::doPostProcessing / L235-L310

ile (thumbnailPackage.encodedDataSize > THUMBNAIL_SIZE_LIMITATION && thumbnailPackage.quality > 0);

• 기술 영역camera3
• 문제limitation
• 효과save

관측 시점 2023-08-07T16:29:19+08:00 · 최초 발견 commit 9c8b13e663

intel/ipu6-camera-hal / src/image_process/ImageScalerCore.cpp / ImageScalerCore::cropCompose / L861-L919

VGA-QCIF end

• 기술 영역v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/image_process/ImageConverter.cpp / convertBuftoYV12 / L740-L757

break; default: ALOGE("%s: unsupported format %d", __func__, format); break;

• 기술 영역v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/image_process/ImageConverter.cpp / convertBuftoNV21 / L759-L775

break; default: ALOGE("%s: unsupported format %d", __func__, format); break;

• 기술 영역v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/image_process/ImageConverter.cpp / convertBuftoYUYV / L777-L787

break; default: LOGE("%s: unsupported format %d", __func__, format); break;

• 기술 영역v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/core/CameraBuffer.cpp / CameraBuffer::allocateMemory / L191-L213

; default: LOGE("memory type %d is incorrect for allocateMemory.", mV.Memory()); return

• 기술 영역buffer allocat, v4l2, mmap
• 문제incorrect

관측 시점 2025-04-27T14:21:24+08:00 · 최초 발견 commit 76ae3ee076

intel/ipu6-camera-hal / src/core/CameraDevice.cpp / CameraDevice::dqbuf / L835-L860

Delegate it to RequestThread, make RequestThread manage all buffer related actions.

• 기술 영역atrace
• 메커니즘delegat

intel/ipu6-camera-hal / src/core/BufferQueue.cpp / BufferQueue::waitBufferQueue / L154-L170

ufQ>& queue, int64_t timeout) { LOG2("@%s waiting buffers", __func__); for

• 기술 영역buffer queue
• 문제timeout

intel/ipu6-camera-hal / src/core/BufferQueue.cpp / BufferQueue::waitFreeBuffersInQueue / L172-L228

uffer, int64_t timeout) { if (!mThreadRunning) { LOG1("@%s: Proce

• 기술 영역buffer queue
• 문제timeout

intel/ipu6-camera-hal / src/core/CaptureUnit.cpp / CaptureUnit::queueAllBuffers / L333-L350

RACE(); if (mExitPending) return OK; int64_t predictSequence = -1; for (auto device : mDevices) { int r

• 기술 영역atrace
• 메커니즘predict

intel/ipu6-camera-hal / src/core/CaptureUnit.cpp / CaptureUnit::poll / L378-L450

F_CAMERA_ATRACE(); int ret = 0; const int poll_timeout_count = 10; // Normally set the timeout threshold

• 기술 영역atrace
• 문제timeout

intel/ipu6-camera-hal / src/core/PSysProcessor.cpp / PSysProcessor::processNewFrame / L522-L650

PSysProcessor ThreadLoop

• 기술 영역schedul
• 문제timeout
• 효과reduc

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/core/PSysProcessor.cpp / PSysProcessor::dispatchTask / L1009-L1132

LOGE("Waiting for frame done event timeout"); return; }

• 기술 영역dispatch
• 문제timeout

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/core/IspParamAdaptor.cpp / IspParamAdaptor::updatePalDataForVideoPipe / L412-L483

PAL output buffer is a reference data for next output buffer, but currently a ring buffer is used in HAL, which caused logic mismatching issue. So temporarily copy latest PAL data into PAL output buffer.

• 기술 영역isp, lsc
• 문제mismatch
• 메커니즘ring buffer
• 효과save

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/core/IspParamAdaptor.cpp / IspParamAdaptor::applyCscMatrix / L768-L779

loat)), VOID_VALUE, "Matrix count mismatching with algo: %zu", matrixCount); const int cscNorm

• 기술 영역isp
• 문제mismatch

intel/ipu6-camera-hal / src/core/IspParamAdaptor.cpp / IspParamAdaptor::updateResultFromAlgo / L976-L1031

_size, VOID_VALUE, "memory is mismatch to store tone map from algo"); LOG2("%s, Tone

• 기술 영역isp, tone map, tonemap
• 문제mismatch

intel/ipu6-camera-hal / src/core/RequestThread.cpp / RequestThread::threadLoop / L333-L397

} LOG2("%s, trigger event %x, SOF %ld, predict %ld, processed %d request id %ld", __

• 기술 영역sof
• 메커니즘predict

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/core/RequestThread.cpp / RequestThread::handleRequest / L399-L469

if (!mActive) return; // Check the final prediction value from 3A if (effectSeq <= mLastEffect

• 기술 영역3a
• 메커니즘predict
• 효과save

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/core/PSysProcessor.h / icamera / L29-L152

include "IspSettings.h" include "psysprocessor/PSysDAG.h" include "CameraScheduler.h"

• 기술 영역dispatch
• 메커니즘delegat

관측 시점 2023-08-07T16:29:19+08:00 · 최초 발견 commit 9c8b13e663

intel/ipu6-camera-hal / src/3a/AiqEngine.cpp / AiqEngine::prepareStatsParams / L176-L241

HDR_FEATURE_E // The statistics timestamp is incorrect. If possible, use SOF timestamp instead. unsig

• 기술 영역hdr, 3a, sof, stream configuration, isp
• 문제incorrect

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/3a/SensorManager.cpp / SensorManager::setWdrMode / L131-L158

OF event handler. // So we know which frame is corrupted and we can skip the corrupted frames. LOG2("<s

• 기술 영역sof
• 문제corrupt
• 효과save

관측 시점 2025-04-27T14:21:24+08:00 · 최초 발견 commit 76ae3ee076

intel/ipu6-camera-hal / src/3a/AiqUtils.h / AiqUtils / L71-L167

b_results* results); // Resize a 2D array with linear interpolation // For some cases, we need to upscale or downscale a 2

• 기술 영역awb, hdr, tonemap, lens shading
• 문제overflow
• 메커니즘interpolat
• 효과avoid

관측 시점 2023-08-07T16:29:19+08:00 · 최초 발견 commit 9c8b13e663

intel/ipu6-camera-hal / src/3a/AiqUtils.cpp / AiqUtils::dumpAeResults / L30-L78

cket_mode_ull ? "ULL" : "none-ULL"); if (aeResult.flicker_reduction_mode == ia_aiq_ae_flicker_reduction_50hz) { LOG3("A

• 기술 영역analog gain, digital gain, line length, frame length, exposure time, convergence
• 문제flicker
• 효과reduc

관측 시점 2024-04-10T09:47:37+08:00 · 최초 발견 commit 28c6d21a5a

intel/ipu6-camera-hal / src/platformdata/CameraParser.cpp / CameraParser::parseControlElement / L910-L979

define V4L2_CID_WATERMARK 0x00982901 define V4L2_CID_WATERMARK2 0x00982902

• 기술 영역v4l2, profil, vblank, hblank, analogue gain, hdr, line length, frame length
• 메커니즘watermark

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/platformdata/CameraParser.cpp / CameraParser::handleStaticMetaData / L1871-L2042

This function will handle all the StaticMetadata related elements. It will be called in the function startElement \param profiles: the pointer of the CameraParser. \param name: the element's name. \param atts: the element's attribute.

• 기술 영역profil, fps
• 메커니즘compensat

관측 시점 2025-06-26T18:11:36+08:00 · 최초 발견 commit 930a974a6e

intel/ipu6-camera-hal / src/platformdata/CameraParser.cpp / CameraParser::getNVMDirectory / L2342-L2419

the path of NVM device is in /sys/bus/i2c/devices/i2c-'adaptorId'/firmware_node/XXXX/path.

• 기술 영역profil
• 메커니즘prioritiz

intel/ipu6-camera-hal / src/hal/MockCameraHal.cpp / MockCameraHal::streamDqbuf / L205-L222

y()) LOGW("<id%d>@%s, wait buffer %d ready timeout", cameraId, __func__, streamId); } *ubuffer =

• 기술 영역camera hal
• 문제timeout

관측 시점 2023-08-07T16:29:19+08:00 · 최초 발견 commit 9c8b13e663

intel/ipu6-camera-hal / src/v4l2/SysCall.h / icamera / L33-L86

include "iutils/Thread.h"

• 기술 영역mmap, media device, v4l2, subdev
• 문제timeout

관측 시점 2021-11-01T14:58:19+08:00 · 최초 발견 commit 5812616e3f

intel/ipu6-camera-hal / src/v4l2/SysCall.h / SysCall / L35-L84

virtual int poll(struct pollfd* pfd, nfds_t nfds, int timeout); static SysCall* getInstance(); static void

• 기술 영역mmap, media device, v4l2, subdev
• 문제timeout

관측 시점 2021-11-01T14:58:19+08:00 · 최초 발견 commit 5812616e3f

intel/ipu6-camera-hal / src/core/psysprocessor/PGUtils.cpp / getCssFmt / L98-L109

ormatMapping[i].cssFmt; } } LOG1("%s: unsupported v4l2 pixel format: %s", __func__, CameraUtils

• 기술 영역v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/core/psysprocessor/PGUtils.cpp / getCssBpp / L155-L191

} } if (bpp == 0) { LOG2("%s: unsupported v4l2 format: 0x%x, compressed %d", __func__, v4l2Fmt,

• 기술 영역bayer, v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/core/psysprocessor/PGUtils.cpp / getCssBpe / L193-L229

} } if (bpe == 0) { LOG2("%s: unsupported v4l2 format: 0x%x, compressed %d", __func__, v4l2Fmt,

• 기술 영역bayer, v4l2
• 문제unsupported

intel/ipu6-camera-hal / src/core/psysprocessor/PGUtils.cpp / getStride / L231-L264

break; default: LOG2("unsupported css format: %d", cssFmt); break; }

• 기술 영역bayer
• 문제unsupported

intel/ipu6-camera-hal / src/core/psysprocessor/PSysDAG.cpp / PSysDAG::addTask / L596-L641

runIspAdapt here, and the ipu parameters // may be incorrect when runPipe. bool runIspAdaptor = true; // HD

• 기술 영역hdr
• 문제incorrect
• 효과save

관측 시점 2024-04-10T09:47:37+08:00 · 최초 발견 commit 28c6d21a5a

intel/ipu6-camera-hal / src/3a/intel3a/Intel3AParameter.cpp / Intel3AParameter::initAeParameter / L108-L126

y_mode = ia_aiq_ae_priority_mode_normal; mAeParams.flicker_reduction_mode = ia_aiq_ae_flicker_reduction_auto; mAeParams.ev_s

• 기술 영역metering, exposure time, analog gain, convergence
• 문제flicker
• 효과reduc

관측 시점 2024-07-18T14:37:27+08:00 · 최초 발견 commit a354967a6a

intel/ipu6-camera-hal / src/3a/intel3a/Intel3AParameter.cpp / Intel3AParameter::updateAeParameter / L316-L437

case ANTIBANDING_MODE_AUTO: mAeParams.flicker_reduction_mode = ia_aiq_ae_flicker_reduction_auto; break;

• 기술 영역exposure time, analog gain, convergence, hdr
• 문제flicker
• 효과reduc

관측 시점 2024-07-18T14:37:27+08:00 · 최초 발견 commit a354967a6a

intel/ipu6-camera-hal / src/3a/intel3a/Intel3AParameter.cpp / Intel3AParameter::dumpParameter / L749-L794

(" flash_mode %d, metering_mode %d, priority_mode %d, flicker_reduction_mode %d", mAeParams.flash_mode, mAeParams.metering

• 기술 영역metering, exposure time, analog gain, frame time, convergence, awb, lens position
• 문제flicker
• 효과reduc

관측 시점 2024-07-18T14:37:27+08:00 · 최초 발견 commit a354967a6a

intel/ipu6-camera-hal / Issue #161

phantom devices results in a black screen and a stream negotiation failure (`reason not-negotiated`). This behavior is s

• 기술 영역v4l2, camera hal, kernel driver, isp, ipa, tuning file
• 문제corrupt, incorrect
• 메커니즘negotiat
• 평가reproduc

관측 시점 2026-10-07T17:19:23Z

intel/ipu6-camera-hal / Issue #183

amerasrc:camerasrc0: streaming task paused, reason not-negotiated (-4) Execution ended after 0:00:00.007261636 Setting p

• 기술 영역camera hal, v4l2
• 메커니즘negotiat
• 평가reproduc

관측 시점 2026-09-18T02:47:45Z

intel/ipu6-camera-hal / Issue #180

ltiple packet header errors detected Transfer FIFO overflow Incomplete long packet detected Frame sync err

• 기술 영역fps, camera hal, frame rate, sensor configuration, frame sync, bayer, v4l2, media controller
• 문제overflow

관측 시점 2026-08-24T20:16:51Z

intel/ipu6-camera-hal / Issue #177

t. I can also capture an image successfully after the workaround: ```bash gst-launch-1.0 -e \ icamerasrc num-buffe

• 기술 영역v4l2, camera hal, fps, frame sync, camera pipeline, capture pipeline
• 문제workaround
• 평가reproduc

관측 시점 2026-08-23T02:57:18Z

intel/ipu6-camera-hal / Issue #176

If not, what's the recommended path to contribute one (calibration procedure, required tools/target charts) for the `13P2

• 기술 영역profil, isp, ipa
• 문제underexpos
• 메커니즘calibrat

관측 시점 2026-07-08T21:03:11Z

intel/ipu6-camera-hal / Issue #159

IPU6 Description: - Camera works with qcam, but with flickering , but with other apps like cheese it showes dark scree

• 기술 영역v4l2, camera manager, sensor crop, kernel driver, videobuf2, bayer
• 문제flicker
• 효과decreas

관측 시점 2025-09-12T12:55:43Z

intel/ipu6-camera-hal / Issue #125

:<camerasrc0> error: streaming task paused, reason not-negotiated (-4) ERROR: from element /GstPipeline:pipeline0/Gstca

• 기술 영역camera hal, bayer
• 메커니즘negotiat

관측 시점 2024-10-11T11:22:36Z

intel/ipu6-camera-hal / Issue #93

Important memory leak of v4l2-relayd service after each camera start Hi dear

• 기술 영역v4l2
• 문제memory leak

관측 시점 2024-03-28T14:40:33Z

intel/ipu6-camera-hal / Issue #14

9.835] CamHAL[WAR] ipu6_bb_video_bayer: wait executors timeout 四 19 19:11:08 TRBA-DVT2-C3 sh[925]: [04-19 19:10:09

• 기술 영역bayer, camera hal
• 문제timeout

관측 시점 2022-04-27T04:00:30Z

intel/ipu6-camera-hal / CMakeLists.txt / 3dbcf76450

Engineer release on 2022-09-16 Signed-off-by: Hao Yao <hao.yao@intel.com>

• 기술 영역tonemap, isp, bayer, schedul
• 문제timeout

관측 시점 2022-09-16T16:34:28+08:00

intel/ipu6-camera-hal / PR #187

17:45:45.533] CamHAL[ERR] Poll: Device node fd 27 poll timeout. [10-05 17:45:46.534] CamHAL[ERR] Poll: Device node f

• 기술 영역dmabuf, fps
• 문제timeout

관측 시점 2026-10-08T06:46:04Z

raspberrypi/libcamera / README.rst / Using GStreamer plugin / L152

le to ``libcamera*:7``. Presently, to prevent element negotiation failures it is required to specify the colorimetry and

• 기술 영역framerate
• 메커니즘negotiat
• 효과prevent

raspberrypi/libcamera / Documentation/camera-sensor-model.rst / The libcamera camera sensor model / L8

abstract sensor model maps libcamera components to the characteristics and operations of an image sensor, and serves as a ref

• 기술 영역kernel driver
• 메커니즘characteris

raspberrypi/libcamera / Documentation/libcamera_architecture.rst / libcamera Architecture / L4

the Image Processing Algorithms. This includes without limitation handling of the MC and V4L2 APIs, buffer management

• 기술 영역v4l2, camera manager, pipeline handler, media controller, stream configuration, schedul, ipa, 3a
• 문제limitation

raspberrypi/libcamera / Documentation/runtime_configuration.rst / List of environment variables and configuration options / L93

s not available the software ISP will automatically fall back to the CPU. Example value: ``gpu`` pipelines.simple.

• 기술 영역ipa, pipeline handler, tuning file, isp, overhead, frame time
• 메커니즘fall back to
• 효과prevent, avoid

raspberrypi/libcamera / include/linux/bcm2835-isp.h / bcm2835_isp_lens_shading / L118-L128

ctrl. @enabled: Enable lens shading. @grid_cell_size: Size of grid cells in samples (16, 32, 64, 128 or 256). @grid_width: Width of lens shading tables in grid cells. @grid_stride: Row to row distance (in grid cells) between grid cells in the same horizontal location. @grid_height: Height of lens shading tables in gri…

• 기술 영역isp, lens shading, dmabuf
• 문제unsupported

raspberrypi/libcamera / include/linux/drm_mode.h / drm_mode_modeinfo / L232-L250

@hskew: horizontal skew @vdisplay: vertical display size @vsync_start: vertical sync start @vsync_end: vertical sync end @vtotal: vertical total size @vscan: vertical scan @vrefresh: approximate vertical refresh rate in Hz @flags: bitmask of misc. flags, see DRM_MODE_FLAG_* defines @type: bitmask of type flags, see DR…

• 기술 영역vsync
• 문제skew

관측 시점 2026-06-26T11:20:40+01:00 · 최초 발견 commit 615e0d67c3

raspberrypi/libcamera / include/linux/drm_mode.h / drm_mode_crtc_page_flip / L1153-L1159

flip is already pending as the ioctl is called, EBUSY will be returned. Flag DRM_MODE_PAGE_FLIP_EVENT requests that drm sends back a vblank event (see drm.h: struct drm_event_vblank) when the page flip is done. The user_data field passed in with this ioctl will be returned as the user_data field in the vblank event st…

• 기술 영역vblank
• 문제tearing

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_colorfx / L76-L94

define V4L2_CID_HUE_AUTO (V4L2_CID_BASE+25) define V4L2_CID_WHITE_BALANCE_TEMPERATURE (V4L2_CID_BASE+26) define V4L2_CID_SHARPNESS (V4L2_CID_BASE+27) define V4L2_CID_BACKLIGHT_COMPENSATION (V4L2_CID_BASE+28) define V4L2_CID_CHROMA_AGC (V4L2_CID_BASE+29) define V4L2_CID_COLOR_KILLER (V4L2_CID_BASE+30) define V4L2_CID_C…

• 기술 영역v4l2, white balance, sharpness, agc
• 메커니즘compensat

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_mpeg_video_h264_profile / L539-L558

define V4L2_CID_MPEG_VIDEO_H264_PROFILE (V4L2_CID_CODEC_BASE+363)

• 기술 영역v4l2, profil
• 메커니즘predict
• 평가baseline

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_vp8_num_partitions / L669-L674

Control IDs for VP8 streams Although VP8 is not part of MPEG we add these controls to the MPEG class as that class is already handling other video compression standards define V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS (V4L2_CID_CODEC_BASE+500)

• 기술 영역v4l2
• 메커니즘partition

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_cid_mpeg_video_hevc_loop_filter_mode / L780-L784

define V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (V4L2_CID_CODEC_BASE + 619) define V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE (V4L2_CID_CODEC_BASE + 620)

• 기술 영역v4l2
• 메커니즘partition

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_cid_mpeg_video_hevc_size_of_length_field / L805-L810

define V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (V4L2_CID_CODEC_BASE + 624) define V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (V4L2_CID_CODEC_BASE + 625) define V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (V4L2_CID_CODEC_BASE + 626) define V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (V4L2_CID_CODEC_BASE + 627) define V4L2_CID_MPEG_VIDE…

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_h264_pred_weights / L1542-L1546

define V4L2_CID_STATELESS_H264_PRED_WEIGHTS (V4L2_CID_CODEC_STATELESS_BASE + 5) struct v4l2_ctrl_h264_pred_weights - Prediction weight table Prediction weight table, which matches the syntax specified by the H264 specification. @luma_log2_weight_denom: see H264 specification. @chroma_log2_weight_denom: see H264 specif…

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_vp8_loop_filter / L1836-L1843

struct v4l2_vp8_loop_filter - VP8 loop filter parameters @ref_frm_delta: Reference frame signed delta values. @mb_mode_delta: MB prediction mode signed delta values. @sharpness_level: matches sharpness_level syntax element. @level: matches loop_filter_level syntax element. @padding: padding field. Should be zeroed by …

• 기술 영역v4l2, sharpness
• 메커니즘predict

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_vp8_entropy / L1888-L1894

struct v4l2_vp8_entropy - VP8 update probabilities @coeff_probs: coefficient probability update values. @y_mode_probs: luma intra-prediction probabilities. @uv_mode_probs: chroma intra-prediction probabilities. @mv_probs: mv decoding probability. @padding: padding field. Should be zeroed by applications. This structur…

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_vp8_frame / L1953-L1982

@prob_intra: frame header syntax element. @prob_last: frame header syntax element. @prob_gf: frame header syntax element. @num_dct_parts: number of DCT coefficients partitions. @first_part_size: size of the first partition, i.e. the control partition. @first_part_header_bits: size in bits of the first partition header…

• 기술 영역v4l2
• 메커니즘partition

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_mpeg2_picture / L2056-L2065

@backward_ref_ts: timestamp of the V4L2 capture buffer to use as reference for backward prediction. @forward_ref_ts: timestamp of the V4L2 capture buffer to use as reference for forward prediction. These timestamp refers to the timestamp field in struct v4l2_buffer. Use v4l2_timeval_to_ns() to convert the struct timev…

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_hevc_pred_weight_table / L2477

ISO/IEC 23008-2, ITU-T Rec. H.265: Weighted prediction parameter

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_hevc_slice_params / L2439-L2481

@reserved0: padding field. Should be zeroed by applications. @slice_segment_addr: specifies the address of the first coding tree block in the slice segment @ref_idx_l0: the list of L0 reference elements as indices in the DPB @ref_idx_l1: the list of L1 reference elements as indices in the DPB @short_term_ref_pic_set_s…

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_vp9_segmentation / L2707-L2714

The value for each segment is a combination of V4L2_VP9_SEGMENT_FEATURE_ENABLED(id) values where id is one of V4L2_VP9_SEG_LVL_{}. @tree_probs: specifies the probability values to be used when decoding a Segment-ID. See '5.15. Segmentation map' section of the VP9 specification for more details. @pred_probs: specifies …

• 기술 영역v4l2
• 메커니즘predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_vp9_frame / L2792-L2816

@frame_context_idx: frame context that should be used/updated. @profile: VP9 profile. Can be 0, 1, 2 or 3. @bit_depth: bits per components. Can be 8, 10 or 12. Note that not all profiles support 10 and/or 12 bits depths. @interpolation_filter: specifies the filter selection used for performing inter prediction. Set to…

• 기술 영역v4l2, profil
• 메커니즘interpolat, predict

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_vp9_compressed_hdr / L2884-L2902

@y_mode: Y prediction mode probability updates. @uv_mode: UV prediction mode probability updates. @partition: partition probability updates. @mv: motion vector probability updates. This structure holds the probabilities update as parsed in the compressed header (Spec 6.3). These values represent the value of probabili…

• 기술 영역v4l2, hdr
• 메커니즘predict, partition

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_av1_reference_frame / L3027-L3036

enum v4l2_av1_reference_frame - AV1 reference frames @V4L2_AV1_REF_INTRA_FRAME: Intra Frame Reference @V4L2_AV1_REF_LAST_FRAME: Last Reference Frame @V4L2_AV1_REF_LAST2_FRAME: Last2 Reference Frame @V4L2_AV1_REF_LAST3_FRAME: Last3 Reference Frame @V4L2_AV1_REF_GOLDEN_FRAME: Golden Reference Frame @V4L2_AV1_REF_BWDREF_…

• 기술 영역v4l2
• 메커니즘golden reference

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_av1_interpolation_filter / L3426

v4l2 av1 interpolation filter enum v4l2_av1_interpolation_filter

• 기술 영역v4l2
• 메커니즘interpolat

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-controls.h / v4l2_ctrl_av1_frame / L3411-L3440

@reserved: padding field. Should be zeroed by applications. @order_hints: specifies the expected output order hint for each reference frame. This field corresponds to the OrderHints variable from the specification (section 5.9.2 "Uncompressed header syntax"). As such, this is only used for non-intra frames and ignored…

• 기술 영역v4l2
• 메커니즘interpolat

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_bubble_info / L520-L529

struct ipu3_uapi_bubble_info - Bubble info for host side debugging @num_of_stripes: A single frame is divided into several parts called stripes due to limitation on line buffer memory. The separation between the stripes is vertical. Each such stripe is processed as a single frame by the ISP pipe. @padding: padding byt…

• 기술 영역isp
• 문제limitation

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_bnr_static_config / L851-L862

&ipu3_uapi_bnr_static_config_thr_ctrl_shd_config @opt_center: optical center &ipu3_uapi_bnr_static_config_opt_center_config Above parameters and opt_center_sqr are used for white balance and shading. @lut: lookup table &ipu3_uapi_bnr_static_config_lut_config @bp_ctrl: detect and remove bad pixels as defined in struct …

• 기술 영역white balance
• 메커니즘lookup table

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_dm_config / L941-L959

feature gain. Precision u5, range [0, 31], default 8. @reserved3: reserved @cr_param2: Second parameter that defines Checker artifact removal feature gain. Precision u5, range [0, 31], default 8. @reserved4: reserved @coring_param: Defines power of false color correction operation. low for preserving edge colors, high…

• 기술 영역demosaic, bayer
• 문제artifact

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_shd_general_config / L1163-L1168

struct ipu3_uapi_shd_general_config - Shading general config @init_set_vrt_offst_ul: set vertical offset, y_start >> block_height_log2 % grid_height_per_slice. @shd_enable: shading enable. @gain_factor: Gain factor. Shift calculated anti shading value. Precision u2. 0x0 - gain factor [1, 5], means no shift interpolate…

• 기술 영역bayer
• 메커니즘interpolat

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_isp_lin_vmem_params / L2537-L2546

struct ipu3_uapi_isp_lin_vmem_params - Linearization parameters @lin_lutlow_gr: linearization look-up table for GR channel interpolation. @lin_lutlow_r: linearization look-up table for R channel interpolation. @lin_lutlow_b: linearization look-up table for B channel interpolation. @lin_lutlow_gb: linearization look-up…

• 기술 영역isp
• 메커니즘interpolat

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_isp_tnr3_vmem_params / L2560-L2567

struct ipu3_uapi_isp_tnr3_vmem_params - Temporal noise reduction vector memory parameters @slope: slope setting in interpolation curve for temporal noise reduction. @reserved1: reserved @sigma: knee point setting in interpolation curve for temporal noise reduction. @reserved2: reserved

• 기술 영역isp, noise reduction
• 메커니즘interpolat
• 효과reduc

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_obgrid_param / L2817

Optical black level compensation

• 기술 영역black level
• 메커니즘compensat

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/intel-ipu3.h / ipu3_uapi_params / L2800-L2818

&ipu3_uapi_isp_tnr3_vmem_params @xnr3_vmem_params: xnr3 VMEM as specified by &ipu3_uapi_isp_xnr3_vmem_params @tnr3_dmem_params: tnr3 DMEM as specified by &ipu3_uapi_isp_tnr3_params @xnr3_dmem_params: xnr3 DMEM as specified by &ipu3_uapi_isp_xnr3_params @obgrid_param: obgrid parameters as specified by &ipu3_uapi_obgrid…

• 기술 영역isp, v4l2, black level
• 메커니즘accelerator, compensat

관측 시점 2025-12-04T16:16:56+01:00 · 최초 발견 commit 5ab66fa728

raspberrypi/libcamera / include/linux/drm.h / drm_vblank_seq_type / L453-L463

M_VBLANK_ABSOLUTE = 0x0, /**< Wait for specific vblank sequence number */ _DRM_VBLANK_RELATIVE = 0x1, /**< Wait for given nu

• 기술 영역vblank, schedul
• 문제unsupported
• 메커니즘sequence number

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/drm.h / drm_syncobj_wait / L956-L972

define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0) define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1) define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 2) /* wait for time point to become available define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE (1 << 3) /* set fence deadline to deadline_nsec

• 기술 영역deadline
• 문제timeout

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/drm.h / drm_syncobj_timeline_wait / L974-L992

point for every handles*/ __u64 points; /* absolute timeout */ __s64 timeout_nsec; __u32 count_handles; __u32 f

• 기술 영역deadline
• 문제timeout

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/drm.h / drm_crtc_get_sequence / L1032-L1037

Query current scanout sequence number

• 기술 영역vblank
• 메커니즘sequence number

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/v4l2-subdev.h / v4l2_subdev_format_whence / L25-L28

enum v4l2_subdev_format_whence - Media bus format type @V4L2_SUBDEV_FORMAT_TRY: try format, for negotiation only @V4L2_SUBDEV_FORMAT_ACTIVE: active format, applied to the device

• 기술 영역v4l2, subdev
• 메커니즘negotiat

관측 시점 2024-10-23T09:01:18+02:00 · 최초 발견 commit 052a9ff245

raspberrypi/libcamera / include/linux/videodev2.h / v4l2_framebuffer / L1243-L1259

O V E R L A Y P R E V I E W

• 기술 영역v4l2
• 문제fixme

raspberrypi/libcamera / include/linux/videodev2.h / v4l2_event_motion_det / L2548-L2552

struct v4l2_event_motion_det - motion detection event @flags: if V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ is set, then the frame_sequence field is valid. @frame_sequence: the frame sequence number associated with this event. @region_mask: which regions detected motion.

• 기술 영역v4l2
• 메커니즘sequence number

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/linux/rkisp1-config.h / rkisp1_cif_isp_dpcc_config / L348-L355

struct rkisp1_cif_isp_dpcc_config - Configuration used by DPCC Configuration used by Defect Pixel Cluster Correction. Three sets of methods can be configured and selected through the @set_use field. The result is the logical OR of all enabled sets. @mode: DPCC mode (RKISP1_CIF_ISP_DPCC_MODE_*) @output_mode: Interpolat…

• 기술 영역isp
• 메커니즘interpolat

관측 시점 2026-05-04T02:20:11+03:00 · 최초 발견 commit 3c0ac8024d

raspberrypi/libcamera / include/libcamera/base/timer.h / libcamera / L17-L47

include <libcamera/base/object.h> include <libcamera/base/signal.h>

• 기술 영역deadline
• 문제timeout

관측 시점 2024-09-02T17:42:10+02:00 · 최초 발견 commit e2cace52d5

raspberrypi/libcamera / include/libcamera/base/timer.h / Object / L21-L45

oint deadline() const { return deadline_; } Signal<> timeout; protected: void message(Message *msg) override; pr

• 기술 영역deadline
• 문제timeout

관측 시점 2024-09-02T17:42:10+02:00 · 최초 발견 commit e2cace52d5

raspberrypi/libcamera / include/libcamera/internal/meson.build

mera_sensor.h', 'camera_sensor_properties.h', 'clock_recovery.h', 'control_serializer.h', 'control_validator

• 기술 영역bayer, camera manager, dma buf, ipa, media device, pipeline handler, v4l2, tracepoint
• 메커니즘clock recovery

raspberrypi/libcamera / include/libcamera/internal/v4l2_videodevice.h / V4L2VideoDevice / L187-L314

streamOff(); void setDequeueTimeout(utils::Duration timeout); Signal<> dequeueTimeout; static std::unique_ptr<V

• 기술 영역v4l2
• 문제timeout

관측 시점 2026-07-27T13:08:52+02:00 · 최초 발견 commit 53397ea15b

raspberrypi/libcamera / include/libcamera/internal/v4l2_videodevice.h / State / L241-L293

te_; std::optional<unsigned int> firstFrame_; Timer watchdog_; utils::Duration watchdogDuration_; }

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-07-27T13:08:52+02:00 · 최초 발견 commit 53397ea15b

raspberrypi/libcamera / include/libcamera/internal/clock_recovery.h / libcamera / L11-L68

include <stdint.h>

• 기술 영역jitter
• 문제jitter

관측 시점 2024-11-26T09:58:20Z · 최초 발견 commit 1282e7dcad

raspberrypi/libcamera / include/libcamera/internal/clock_recovery.h / ClockRecovery / L13-L66

clock recovery class ClockRecovery { public: ClockRecovery(); void

• 기술 영역jitter
• 문제jitter
• 메커니즘clock recovery

관측 시점 2024-11-26T09:58:20Z · 최초 발견 commit 1282e7dcad

raspberrypi/libcamera / include/libcamera/internal/software_isp/swisp_stats.h / libcamera / L15-L48

include "libcamera/internal/vector.h"

• 기술 영역isp
• 문제overflow

raspberrypi/libcamera / include/libcamera/internal/software_isp/swisp_stats.h / SwIspStats / L24-L46

\brief Struct that holds the statistics for the Software ISP The struct value types are large enough to not overflow. Should they still overflow for some reason, no check is performed and they wrap around.

• 기술 영역isp
• 문제overflow

raspberrypi/libcamera / src/libcamera/delayed_controls.cpp / DelayedControls::applyControls / L232-L283

\brief Inform DelayedControls of the start of a new frame \param[in] sequence Sequence number of the frame that started Inform the state machine that a new frame has started and of its sequence number. Any user of these helpers is responsible to inform the helper about the start of any frame. This can be connected wit…

• 기술 영역v4l2
• 메커니즘sequence number, state machine

관측 시점 2026-02-12T16:05:34+02:00 · 최초 발견 commit 993968d80e

raspberrypi/libcamera / src/libcamera/meson.build

'camera_controls.cpp', 'camera_lens.cpp', 'clock_recovery.cpp', 'control_serializer.cpp', 'control_valid

• 기술 영역camera manager, bayer, dma buf, ipa, media device, pipeline handler, v4l2, isp
• 메커니즘clock recovery

raspberrypi/libcamera / src/libcamera/request.cpp / Request::Private::prepare / L228-L260

the asynchronous event completion. As we currently only handle fences, the function emits the prepared signal immediately if there are no fences to wait on. Otherwise the prepared signal is emitted when all fences have been signalled or the optional timeout has expired. If not all the fences have been correctly signal…

• 기술 영역synchroniz, pipeline handler
• 문제timeout

관측 시점 2026-04-16T15:14:34+02:00 · 최초 발견 commit aa110d2e5c

raspberrypi/libcamera / src/libcamera/v4l2_subdevice.cpp / MediaBusFormatInfo / L824-L837

\brief Retrieve information about a media bus format \param[in] code The media bus format code \return The MediaBusFormatInfo describing the \a code if known, or an invalid MediaBusFormatInfo otherwise

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/v4l2_subdevice.cpp / std::string / L1703-L1737

\brief Retrieve the model name of the device The model name allows identification of the specific device model. This can be used to infer device characteristics, for instance to determine the analogue gain model of a camera sensor based on the sensor model name. Neither the V4L2 API nor the Media Controller API expose…

• 기술 영역analogue gain, v4l2, media controller
• 메커니즘characteris

관측 시점 2025-08-15T14:46:09+02:00 · 최초 발견 commit 9b477c114b

raspberrypi/libcamera / src/libcamera/camera_manager.cpp / CameraManager::Private::createPipelineHandlers / L109-L152

) << "'"; /* * Try each pipeline handler until it exhaust * all pipelines it can provide. */ pipelineFac

• 기술 영역camera manager, pipeline handler
• 문제exhaust

관측 시점 2025-10-15T17:21:56+03:00 · 최초 발견 commit 16063986bb

raspberrypi/libcamera / src/libcamera/v4l2_pixelformat.cpp / V4L2PixelFormat::description / L316-L327

\brief Retrieve the V4L2 description for the format The description matches the value used by the kernel, as would be reported by the VIDIOC_ENUM_FMT ioctl. \return The V4L2 description corresponding to the V4L2 format, or a placeholder description if not found

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/v4l2_pixelformat.cpp / V4L2PixelFormat::toPixelFormat / L341-L352

\brief Convert the V4L2 pixel format to the corresponding PixelFormat \param[in] warn When true, log a warning message if the V4L2 pixel format isn't known Users of this function might try to convert a V4L2PixelFormat to a PixelFormat just to check if the format is supported or not. In that case, they can suppress the…

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/clock_recovery.cpp / ClockRecovery::configure / L66-L76

\brief Set configuration parameters \param[in] numSamples The approximate duration for which the state of the model is persistent \param[in] maxJitter New output samples are clamped to no more than this amount of jitter, to prevent sudden swings from having a large effect \param[in] minSamples The fitted clock model i…

• 기술 영역jitter
• 문제jitter
• 메커니즘clock recovery
• 효과prevent

관측 시점 2025-08-25T20:44:35+09:00 · 최초 발견 commit bfd68f7869

raspberrypi/libcamera / src/libcamera/dma_buf_allocator.cpp / DmaBufAllocator::allocFromHeap / L163-L187

t < 0) { LOG(DmaBufAllocator, Error) << "dma-heap allocation failure for " << name; return {}; } UniqueFD allocFd(allo

• 기술 영역dma buf, heap allocat
• 문제allocation failure

관측 시점 2026-07-09T11:30:45-07:00 · 최초 발견 commit 168b00eb34

raspberrypi/libcamera / src/android/camera_stream.cpp / CameraStream::waitFence / L139-L166

e * fences waiting in the core. * * \todo Better characterize the timeout. Currently equal to the one * used by th

• 기술 영역instrument, camera hal
• 문제timeout
• 메커니즘characteriz

관측 시점 2026-02-12T17:15:59+02:00 · 최초 발견 commit 59be23f34e

raspberrypi/libcamera / src/android/camera_hal_manager.cpp / CameraHalManager::getCameraInfo / L247-L269

ON_3_3; info->resource_cost = 0; info->static_camera_characteristics = camera->getStaticMetadata(); info->conflicting_devi

• 기술 영역camera hal
• 메커니즘characteris

관측 시점 2025-11-03T15:31:01+01:00 · 최초 발견 commit 9a608ed72d

raspberrypi/libcamera / src/android/camera_device.cpp / sortCamera3StreamConfigs / L66-L165

Reorder the configurations so that libcamera::Camera can accept them as much as possible. The sort rule is as follows. 1.) The configuration for NV12 request whose resolution is the largest. 2.) The configuration for JPEG request. 3.) Others. Larger resolutions and different formats are put earlier.

• 기술 영역camera3
• 메커니즘prioritiz

관측 시점 2025-03-04T13:42:19+01:00 · 최초 발견 commit 633063e099

raspberrypi/libcamera / src/android/camera_device.cpp / CameraDevice::constructDefaultRequestSettings / L468-L519

Produce a metadata pack to be used as template for a capture request.

• 기술 영역capture request, camera_metadata, camera3, request template
• 문제unsupported

관측 시점 2025-03-04T13:42:19+01:00 · 최초 발견 commit 633063e099

raspberrypi/libcamera / src/android/camera_device.cpp / CameraDevice::getResultMetadata / L1423-L1676

Produce a set of fixed result metadata.

• 기술 영역camera_metadata, fps
• 문제workaround
• 메커니즘compensat

관측 시점 2025-03-04T13:42:19+01:00 · 최초 발견 commit 633063e099

raspberrypi/libcamera / src/android/camera_stream.h / CameraStream / L30-L187

d * to the framework as they are. The Android stream characteristics are * directly translated to the libcamera stream co

• 기술 영역stream configuration
• 메커니즘characteris

관측 시점 2024-08-04T21:55:43+01:00 · 최초 발견 commit d021d29822

raspberrypi/libcamera / src/libcamera/base/event_dispatcher.cpp / EventDispatcher::~EventDispatcher / L37-L39

The EventDispatcher class allows the integration of the application event loop with libcamera by abstracting how events and timers are managed and processed. To listen to events, libcamera creates EventNotifier instances and registers them with the dispatcher with registerEventNotifier(). The event notifier \ref Event…

• 기술 영역dispatch
• 문제timeout

raspberrypi/libcamera / src/libcamera/base/event_dispatcher_poll.cpp / EventDispatcherPoll::poll / L201-L224

std::vector<struct pollfd> *pollfds) { /* Compute the timeout. */ Timer *nextTimer = !timers_.empty() ? timers_.fro

• 기술 영역dispatch, deadline
• 문제timeout

관측 시점 2026-01-06T13:11:57+01:00 · 최초 발견 commit fa22b4ffef

raspberrypi/libcamera / src/libcamera/base/event_dispatcher_poll.cpp / EventDispatcherPoll::processTimers / L291-L304

eak; timers_.pop_front(); timer->stop(); timer->timeout.emit(); } }

• 기술 영역dispatch, deadline
• 문제timeout

관측 시점 2026-01-06T13:11:57+01:00 · 최초 발견 commit fa22b4ffef

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.h / libcamera / L29-L169

include "debayer.h"

• 기술 영역debayer, bayer
• 메커니즘interpolat
• 효과faster, avoid

관측 시점 2026-07-20T13:39:35+02:00 · 최초 발견 commit 244572db3e

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.h / DebayerCpu / L32-L167

ires access * to the previous and next src lines for interpolating the missing * colors. To allow copying the src lines

• 기술 영역debayer, bayer
• 메커니즘interpolat
• 효과faster, avoid

관측 시점 2026-07-20T13:39:35+02:00 · 최초 발견 commit 244572db3e

raspberrypi/libcamera / src/libcamera/software_isp/TODO.md / Remove statsReady signal / L40

ass applies colour gains in addition to performing the interpolation, it may be more of a naming issue. Removing the signa

• 기술 영역isp
• 메커니즘interpolat

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.h / DebayerEGL / L40-L122

ts 3 x 3 */ GLint ccmUniformDataIn_; /* Black Level compensation */ GLint blackLevelUniformDataIn_; /* Gamma */ GLi

• 기술 영역debayer, awb, ccm, black level
• 메커니즘compensat

관측 시점 2026-07-29T11:55:57+09:00 · 최초 발견 commit 63116875f2

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/delayed_controls.cpp / DelayedControls::applyControls / L248-L299

\brief Inform DelayedControls of the start of a new frame \param[in] sequence Sequence number of the frame that started Inform the state machine that a new frame has started and of its sequence number. Any user of these helpers is responsible to inform the helper about the start of any frame. This can be connected wit…

• 기술 영역v4l2
• 메커니즘sequence number, state machine

관측 시점 2026-05-08T13:57:41+01:00 · 최초 발견 commit 2c0c52be1a

raspberrypi/libcamera / src/py/cam/helpers.py / demosaic / L12-L73

# bayer arrays, adding blank pixels at their edges to compensate for the # size of the window when calculating aver

• 기술 영역demosaic, bayer
• 메커니즘compensat

관측 시점 2024-08-04T21:55:43+01:00 · 최초 발견 commit d021d29822

raspberrypi/libcamera / src/apps/qcam/main_window.cpp / MainWindow::startCapture / L356-L537

\brief Start capture with the current camera This function shall not be called directly, use toggleCapture() instead.

• 기술 영역stream configuration, camera configuration
• 문제unsupported
• 효과save

관측 시점 2025-10-15T17:06:51+03:00 · 최초 발견 commit 1e4e158d98

raspberrypi/libcamera / src/android/metadata/camera_metadata.c / validate_and_calculate_camera_metadata_entry_data_size / L374-L392

This method should be used when the camera metadata cannot be trusted. For example, when it's read from Parcel.

• 기술 영역camera_metadata
• 문제overflow

관측 시점 2024-08-04T21:55:43+01:00 · 최초 발견 commit d021d29822

raspberrypi/libcamera / src/android/metadata/camera_metadata.c / append_camera_metadata / L581-L632

NULL || src == NULL ) return ERROR; // Check for overflow if (src->entry_count + dst->entry_count < src->ent

• 기술 영역camera_metadata
• 문제overflow

관측 시점 2024-08-04T21:55:43+01:00 · 최초 발견 commit d021d29822

raspberrypi/libcamera / src/ipa/libipa/lsc.h / libcamera / L21-L137

include "interpolator.h" include "lsc_base.h"

• 기술 영역lsc, ipa
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00 · 최초 발견 commit 62d4bfc450

raspberrypi/libcamera / src/ipa/libipa/lsc.h / ipa / L23-L137

namespace lsc */ #ifndef __DOXYGEN__ template<> void Interpolator<lsc::Components<uint16_t>>:: interpolate(const lsc::C

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00 · 최초 발견 commit 62d4bfc450

raspberrypi/libcamera / src/ipa/libipa/lsc.h / configure / L87-L133

ate.enabled = true; return 0; } const Components interpolateComponents(unsigned int ct) { return sets_.getInterpolated(ct)

• 기술 영역lsc
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00 · 최초 발견 commit 62d4bfc450

raspberrypi/libcamera / src/ipa/libipa/ccm.h / libcamera / L18-L75

include "fixedpoint.h" include "interpolator.h"

• 기술 영역ipa, ccm
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00 · 최초 발견 commit 9062131522

raspberrypi/libcamera / src/ipa/libipa/ccm.h / CcmAlgorithmBase / L38-L54

ControlList &metadata); private: unsigned int ct_; Interpolator<Matrix<float, 3, 3>> ccm_; Interpolator<Matrix<int16_

• 기술 영역ccm
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00 · 최초 발견 commit 9062131522

raspberrypi/libcamera / src/ipa/libipa/fc_queue.h / libcamera / L15-L135

include <libcamera/base/log.h>

• 기술 영역ipa, pipeline handler
• 문제underrun
• 메커니즘sequence number
• 효과avoid

관측 시점 2024-10-16T16:00:13+02:00 · 최초 발견 commit e07ac56066

raspberrypi/libcamera / src/ipa/libipa/fc_queue.h / namespace / L17-L133

ext to preseve the context. * * \todo If the the sequence number of the context to initialise * is smaller than the

• 기술 영역ipa, pipeline handler
• 문제underrun
• 메커니즘sequence number
• 효과avoid

관측 시점 2024-10-16T16:00:13+02:00 · 최초 발견 commit e07ac56066

raspberrypi/libcamera / src/ipa/libipa/fc_queue.h / clear / L40-L122

ext to preseve the context. * * \todo If the the sequence number of the context to initialise * is smaller than the

• 기술 영역ipa, pipeline handler
• 문제underrun
• 메커니즘sequence number
• 효과avoid

관측 시점 2024-10-16T16:00:13+02:00 · 최초 발견 commit e07ac56066

raspberrypi/libcamera / src/ipa/libipa/ccm.cpp / CcmAlgorithmBase::configure / L103-L111

\brief Configure the CCM algorithm \param[in] state The CCM active state \param[in] temperatureK The colour temperature in Kelvin Configure the CCM algorithm by initializing the manual and automatic states in \a state by interpolating the default colour correction matrix with the given colour temperature \a temperatur…

• 기술 영역ccm
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00 · 최초 발견 commit 9062131522

raspberrypi/libcamera / src/ipa/libipa/ccm.cpp / CcmAlgorithmBase::queueRequest / L137-L154

- controls::ColourTemperature - controls::ColourCorrectionMatrix When controls::ColourCorrectionMatrix is passed in the supplied matrix is stored in \a state and \a context. When controls::ColourTemperature is passed in, the matrices loaded from configuration file are interpolated with the given temperature and the re…

• 기술 영역ccm, ipa
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00 · 최초 발견 commit 9062131522

raspberrypi/libcamera / src/ipa/libipa/ccm.cpp / CcmAlgorithmBase::prepare / L170-L184

\brief Calculate the matrix coefficients for a colour temperature \param[in] state The CCM active state \param[in] context The CCM frame context \param[in] frame The frame number \param[in] temperatureK The colour temperature in Kelvin Interpolate the colour correction matrices as loaded from configuration file for co…

• 기술 영역ccm, ipa
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00 · 최초 발견 commit 9062131522

raspberrypi/libcamera / src/ipa/libipa/awb_grey.h / libcamera / L17-L38

include "awb.h" include "interpolator.h"

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2026-02-02T10:02:16Z · 최초 발견 commit 48d168e2bc

raspberrypi/libcamera / src/ipa/libipa/awb_grey.h / ipa / L19-L36

colourTemperature) override; private: std::optional<Interpolator<Vector<double, 2>>> colourGainCurve_; }; }

• 기술 영역ipa
• 메커니즘interpolat

관측 시점 2026-02-02T10:02:16Z · 최초 발견 commit 48d168e2bc

raspberrypi/libcamera / src/ipa/libipa/awb_grey.h / AwbImplementation / L21-L34

colourTemperature) override; private: std::optional<Interpolator<Vector<double, 2>>> colourGainCurve_; }

• 기술 영역awb
• 메커니즘interpolat

관측 시점 2026-02-02T10:02:16Z · 최초 발견 commit 48d168e2bc

raspberrypi/libcamera / src/ipa/libipa/interpolator.h / libcamera / L20-L127

include "libcamera/internal/value_node.h"

• 기술 영역ipa
• 메커니즘interpolat
• 효과lower

관측 시점 2026-05-28T12:49:09+05:30 · 최초 발견 commit 9561bd2ed8

raspberrypi/libcamera / src/ipa/libipa/interpolator.h / namespace / L22-L125

namespace LOG_DECLARE_CATEGORY(Interpolator) namespace ipa { template<typename T> class Interpol

• 기술 영역ipa
• 메커니즘interpolat
• 효과lower

관측 시점 2026-05-28T12:49:09+05:30 · 최초 발견 commit 9561bd2ed8

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / Interpolator<lsc::Components<uint16_t>>:: interpolate / L96-L104

interpolator<lsc components<uint16 t>> interpolate void Interpola

• 기술 영역lsc
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00 · 최초 발견 commit 62d4bfc450

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / Interpolator<lsc::Components<uint8_t>>:: interpolate / L107-L115

interpolator<lsc components<uint8 t>> interpolate void Interpolat

• 기술 영역lsc
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00 · 최초 발견 commit 62d4bfc450

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / LscAlgorithmBase::init / L135-L168

\param[in] tuningData The tuning data \param[in] controls The IPA list of supported controls \param[in] descriptor The LSC engine descriptor Parse \a tuningData according to the settings specified in \a descriptor to populate the LSC data and registers LSC controls in \a controls. \return 0 on success, a negative erro…

• 기술 영역lsc, ipa, tuning file
• 문제unsupported

raspberrypi/libcamera / src/ipa/ipu3/algorithms/blc.cpp / BlackLevelCorrection::prepare / L47-L65

\brief Fill in the parameter structure, and enable black level correction \param[in] context The shared IPA context \param[in] frame The frame context sequence number \param[in] frameContext The FrameContext for this frame \param[out] params The IPU3 parameters Populate the IPU3 parameter structure with the correction…

• 기술 영역black level, ipa
• 메커니즘sequence number

관측 시점 2024-09-02T17:41:57+02:00 · 최초 발견 commit 759b0731d2

raspberrypi/libcamera / src/ipa/rpi/controller/statistics.h / RPiController / L16-L78

include "histogram.h" include "region_stats.h"

• 기술 영역agc, lsc, awb
• 문제flicker
• 효과avoid

raspberrypi/libcamera / src/ipa/rpi/controller/statistics.h / ColourStatsPos / L51-L74

Positioning of the AWB/ALSC statistics gathering in the pipeline: Pre-LSC or post-LSC.

• 기술 영역awb, lsc
• 문제flicker
• 효과avoid

raspberrypi/libcamera / src/ipa/rpi/controller/agc_status.h / AgcStatus / L28-L44

Note: total_exposure_value will be reported as zero until the algorithm has seen statistics and calculated meaningful values. The contents should be ignored until then.

• 기술 영역agc, hdr
• 문제flicker

관측 시점 2025-07-21T08:47:27+01:00 · 최초 발견 commit 68e8476d56

raspberrypi/libcamera / src/ipa/rpi/controller/agc_algorithm.h / RPiController / L15-L42

include "algorithm.h"

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/agc_algorithm.h / AgcAlgorithm / L17-L40

rtual void setFlickerPeriod(libcamera::utils::Duration flickerPeriod) = 0; virtual void setFixedExposureTime(unsigned int

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc.cpp / std::vector<double> / L141-L150

th different channels. * Therefore we shall impose a limitation, at least for now, that all * channels will use the

• 기술 영역agc, metering
• 문제limitation

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc.cpp / Agc::setFlickerPeriod / L161-L168

agc set flicker period void Agc::setFlickerPeriod(Duration flickerPeri

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/hdr.h / RPiController / L22-L85

This is our implementation of an HDR algorithm.

• 기술 영역hdr, lens shading, ipa, tonemap
• 메커니즘adaptive

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/hdr.h / HdrConfig / L24-L56

gth; libcamera::ipa::Pwl tonemap; /* These relate to adaptive tonemap calculation. */ double speed; std::vector<do

• 기술 영역hdr, lens shading, ipa, tonemap
• 메커니즘adaptive

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/contrast.cpp / Contrast::read / L41-L59

:read(const libcamera::ValueNode &params) { // enable adaptive enhancement by default config_.ceEnable = params["ce_

• 기술 영역gamma curve, ipa
• 메커니즘adaptive

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb.h / RPiController / L17-L180

include "../awb_algorithm.h" include "../awb_status.h" include "libipa/pwl.h"

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb.h / AwbAlgorithm / L66-L170

ts, Metadata *imageMetadata) override; static double interpolateQuadatric(libcamera::ipa::Pwl::Point const &a, libcamera

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb.h / initialise / L71-L166

ts, Metadata *imageMetadata) override; static double interpolateQuadatric(libcamera::ipa::Pwl::Point const &a, libcamera

• 기술 영역ipa, awb
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.h / RPiController / L23-L160

This is our implementation of AGC.

• 기술 영역agc, ipa
• 문제flicker
• 효과lower

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.h / AgcChannel / L84-L158

ev); void setFlickerPeriod(libcamera::utils::Duration flickerPeriod); void setMaxExposureTime(libcamera::utils::Duration

• 기술 영역agc, awb, digital gain
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc.h / RPiController / L17-L62

include "agc_channel.h"

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc.h / AgcAlgorithm / L25-L60

ide; void setFlickerPeriod(libcamera::utils::Duration flickerPeriod) override; void setMaxExposureTime(libcamera::utils::

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/alsc.h / RPiController / L21-L174

include "../algorithm.h" include "../alsc_status.h" include "../statistics.h"

• 기술 영역lsc, lens shading
• 메커니즘calibrat
• 효과lower

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes / L78-L97

g bayesConfig_; void awbBayes(); libcamera::ipa::Pwl interpolatePrior(); double coarseSearch(libcamera::ipa::Pwl const &pri

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes::prepareStats / L193-L213

ied to the stats in this pipeline, so stop * any LSC compensation. We also ignore config_.fast in this version. */ c

• 기술 영역awb, lsc
• 메커니즘compensat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes::interpolatePrior / L215-L239

awb bayes interpolate prior ipa::Pwl AwbBayes::interpolatePrior() { /* *

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes::coarseSearch / L241-L285

oint of the search, but refine it with a quadratic * interpolation around its neighbours. */ if (points_.size() > 2) {

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes::fineSearch / L287-L367

ely across the CT curve, * now let's do a quadratic interpolation for the best result. */ bestPoint = std::max(1, s

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat
• 효과increas

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_bayes.cpp / AwbBayes::awbBayes / L369-L413

. not entirely sure about this. */ ipa::Pwl prior = interpolatePrior(); prior *= zones_.size() / (double)(statistics_->awb

• 기술 영역awb, ipa
• 메커니즘interpolat
• 효과save

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb.cpp / Awb::interpolateQuadatric / L427-L445

awb interpolate quadatric double Awb::interpolateQuadatric(libcamera::

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.cpp / AgcChannel::AgcChannel / L272-L289

, lockCount_(0), lastTargetExposure_(0s), ev_(1.0), flickerPeriod_(0s), maxExposureTime_(0s), fixedExposureTime_(0s),

• 기술 영역agc, awb
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.cpp / AgcChannel::read / L291-L321

e.height) { LOG(RPiAgc, Error) << "AgcMeteringMode: Incorrect number of weights"; return -EINVAL; } } /* *

• 기술 영역agc, exposure time
• 문제incorrect

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.cpp / AgcChannel::setFlickerPeriod / L382-L385

agc channel set flicker period void AgcChannel::setFlickerPeriod(Duration flic

• 기술 영역agc
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.cpp / AgcChannel::housekeepConfig / L566-L614

; status_.fixedGain = limitGain(fixedGain_); status_.flickerPeriod = flickerPeriod_; LOG(RPiAgc, Debug) << "ev " << stat

• 기술 영역agc, metering, profil
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/agc_channel.cpp / AgcChannel::divideUpExposure / L881-L954

} } } /* * Finally adjust exposure time for flicker avoidance (require both * exposure time and gain not

• 기술 영역agc, exposure time, analogue gain, digital gain
• 문제flicker
• 효과avoid

관측 시점 2026-06-08T15:16:04+03:00 · 최초 발견 commit 474eed8041

raspberrypi/libcamera / src/ipa/mali-c55/algorithms/ccm.cpp / Ccm::prepare / L130-L155

\copydoc libcamera::ipa::Algorithm::prepare

• 기술 영역ccm, ipa, awb
• 메커니즘interpolat

관측 시점 2026-05-22T18:53:27+02:00 · 최초 발견 commit 1bf7e9485e

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/dpf.cpp / Dpf::init / L48-L173

\copydoc libcamera::ipa::Algorithm::init

• 기술 영역ipa, isp
• 메커니즘lookup table

관측 시점 2026-05-04T01:03:54+03:00 · 최초 발견 commit 2106c9f986

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/dpf.cpp / Dpf::queueRequest / L178-L215

\copydoc libcamera::ipa::Algorithm::queueRequest

• 기술 영역ipa, denoise
• 문제unsupported

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/blc.cpp / BlackLevelCorrection::BlackLevelCorrection / L42-L51

n::BlackLevelCorrection() { /* * This is a bit of a hack. In raw mode no black level correction * happens. Th

• 기술 영역black level
• 문제hack

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/blc.cpp / BlackLevelCorrection::init / L56-L107

\copydoc libcamera::ipa::Algorithm::init

• 기술 영역black level, ipa, tuning file
• 메커니즘fall back to
• 효과avoid

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/wdr.cpp / WideDynamicRange::prepare / L394-L445

\copydoc libcamera::ipa::Algorithm::prepare

• 기술 영역ipa
• 메커니즘compensat

관측 시점 2025-10-19T15:28:34+03:00 · 최초 발견 commit 554c5c7fa1

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/filter.cpp / Filter::queueRequest / L56-L111

\copydoc libcamera::ipa::Algorithm::queueRequest

• 기술 영역ipa, sharpness, denoise
• 문제unsupported

raspberrypi/libcamera / Documentation/design/ae.rst / Flickering when going from auto to manual / L36

Flickering when going from auto to manual When a manual exposure

• 기술 영역auto exposure
• 문제flicker
• 효과save

raspberrypi/libcamera / Documentation/design/ae.rst / Raspberry Pi / L96

e from being used as a valid value. To get around the flickering issue, when AeEnable is false, the Raspberry Pi AEGC s

• 기술 영역ipa, exposure time
• 문제flicker
• 효과prevent

raspberrypi/libcamera / Documentation/design/ae.rst / Summary of goals / L134

s transitions from auto to manual, and do so without flickering - We need custom minimum values for the manual contro

• 기술 영역exposure time, analogue gain
• 문제flicker

raspberrypi/libcamera / Documentation/design/ae.rst / Our solution / L151

imulates an auto -> locked -> manual or auto -> manual state transition, and makes it impossible to do the nonsensical manual

• 기술 영역exposure time, analogue gain, agc
• 메커니즘state transition

raspberrypi/libcamera / Documentation/design/ae.rst / Description of the controls / L273

algorithm will keep be used. This can be used to do a flickerless transition from auto to manual as described earlier. I

• 기술 영역auto exposure
• 문제flicker

raspberrypi/libcamera / Documentation/guides/application-developer.rst / Handle request completion events / L384

de the ``for`` loop from above, we can print the Frame sequence number and details of the planes. .. code:: cpp std::cou

• 기술 영역request completion, dma buf
• 메커니즘sequence number
• 효과avoid, increas

raspberrypi/libcamera / src/ipa/rpi/cam_helper/cam_helper_imx296.cpp / 6c1dd9d555

Revert "ipa: rpi: imx296: Enable embedded data" This reverts commit b7fa47fc0fdf8d0946931bc4a3c02296c07c5cf5. Right now embedded data with the imx296 cannot be negotiated with the CFE. Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

• 기술 영역ipa
• 메커니즘negotiat
• 사소한 변경revert

관측 시점 2026-08-17T09:28:38+01:00

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / 62d4bfc450

ipa: libipa: lsc: Specialize Interpolator for uint8_t Specialize Interpolator<>::interpolate() for uint8_t register size. Some platforms (Mali, Simple) use an 8 bit register size. Provide a specialization for the that type of Interpolator<>::interpolate(). Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Re…

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-08-05T15:38:17+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc_base.cpp / c261d07321

ipa: libipa: lsc: Move Interpolator<lsc::Components> to lsc_base Move the Interpolator<lsc::Components>: specialization from the RkISP1 IPA to the lsc_base header. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.…

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-07-01T09:46:29+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc_base.cpp / 5d660ce81d

ipa: libipa: Introduce lsc_base.h Provide a header and implementation for the base definitions of common lens shading calibration data types, and move re-usable code out from the RkISP1 lsc algorithm. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.c…

• 기술 영역ipa, lsc, lens shading, tuning file, sensor configuration, sensor crop
• 메커니즘calibrat

관측 시점 2026-06-30T16:28:03+02:00

raspberrypi/libcamera / src/ipa/mali-c55/algorithms/ccm.cpp / 1bf7e9485e

ipa: mali-c55: Implement Ccm algorithm Implement Ccm algorithm for Mali-C55 base on the libipa CcmAlgorithm class. Mali has configurable colour gains as part of the CCM hardware block. Fix them to 1.0 for the time being as white balance is performed by the dedicated Awb algorithm in the Bayer colour space. The existin…

• 기술 영역ipa, ccm, white balance, awb, bayer
• 메커니즘interpolat

관측 시점 2026-05-22T18:53:27+02:00

raspberrypi/libcamera / src/ipa/libipa/ccm.cpp / 9062131522

ipa: libipa: Add CcmAlgorithm to libipa Add a CcmAlgorithm to libipa. The CcmAlgorithm performs interpolation of the colour correction matrices as loaded from tuning file on a colour temperature. The implementation is based on the existing RkISP1 CCM algorihtm. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.co…

• 기술 영역ipa, tuning file, ccm
• 메커니즘interpolat

관측 시점 2026-05-20T22:38:49+02:00

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / 93bed4da91

ipa: rpi: Gate CamHelper::prepare() by the mistrust count The current logic in the IPA gates the controller/algorithms from running on a the frame if mistrustCount_ > 0. This logic is somewhat incorrect, as the image data is indeed valid, just the embedded data and other bits of metadata are possibly invalid. This com…

• 기술 영역ipa, pipeline handler, convergence, agc, awb
• 문제incorrect

관측 시점 2026-08-05T15:09:22+01:00

raspberrypi/libcamera / meson.build / 191e202178

libcamera v0.7.2 This release brings 113 commits, and interestingly fixes two separate saturation handling bugs in both the SoftISP and the Raspberry Pi IPA independently. In particular the fixes to the SoftISP mean we can look forward to tuning cameras on laptops and mobile phones with real CCMs now. Also on the Soft…

• 기술 영역ipa, black level, agc, pipeline handler, isp, digital gain, debayer, v4l2
• 문제unsupported, timeout
• 메커니즘interpolat
• 효과improv, prevent, avoid, reduc
• 평가benchmark
• 사소한 변경revert , rename

관측 시점 2026-07-10T11:12:38+01:00

raspberrypi/libcamera / include/libcamera/internal/converter/converter_dw100_vertexmap.h / b1e9007e47

libcamera: converter: converter_dw100: Allow to transform between different camera matrices To configure the lens dewarping, the calibrated camera matrix and the distortion coefficients are required. For some use cases (like removing a skew introduced by the camera geometry) it is necessary to define an additional out…

• 기술 영역tuning parameter
• 문제skew
• 메커니즘calibrat

관측 시점 2026-07-09T14:41:51+02:00

raspberrypi/libcamera / src/ipa/libipa/interpolator.h / 9561bd2ed8

ipa: libipa: Handle missing YAML nodes in Interpolator Interpolator::readYaml() currently logs an error when passed an empty YAML object because it expects the node to always be a list. Optional tuning parameters such as colourGains in the AWB Grey algorithm may be absent from the tuning files. rkisp1 uses tuning file…

• 기술 영역ipa, awb
• 메커니즘interpolat
• 효과avoid

관측 시점 2026-05-28T12:49:09+05:30

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / 2985ca6ac0

libcamera: software_isp: debayer_egl: Demote unsupported format log to Info DebayerEGL::getInputConfig() logs at Error level when it encounters an unsupported input format. This function is called during format enumeration from the simple pipeline handler's tryPipeline(), which iterates over all pixel formats reported…

• 기술 영역isp, debayer, pipeline handler, bayer
• 문제unsupported

관측 시점 2026-06-02T10:26:01+09:00

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / 93f0db167a

debayer_egl: Implement dmabuf import for input buffers In many cases we can import the GPU-ISP input buffers, dmabufs from v4l2, directly into EGL instead of mapping and uploading - i.e. copying - them. Doing so can have positive effects in multiple areas, including reducing memory bandwidth and CPU usage, as well as …

• 기술 영역debayer, dmabuf, isp, v4l2, cpu usage, 3a, mmap
• 메커니즘fall back to
• 효과reduc, avoid, faster
• 평가benchmark

관측 시점 2026-05-27T10:15:34+02:00

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.cpp / ad5506544b

pipeline: rpi: Fix crash when configuring timeout When loading a config containing a nonzero "camera_timeout_value_ms" (as is required for externally-triggered cameras) it would crash as the pipeline handler tried to access both the IPA and frontEndDevice before either had been created. Re-order to avoid the crash. Fi…

• 기술 영역pipeline handler, ipa
• 문제timeout
• 효과avoid

관측 시점 2026-05-27T11:25:16+01:00

raspberrypi/libcamera / include/libcamera/base/regex.h / 35c02dae9e

libcamera: base: regex: Fix preprocessor check clang has no `maybe-uninitialized` warning, therefore the suppression will generate a compiler error. This was probably hidden by the fact that `__SANITIZE_*__` macros have only been added to clang since llvm 22. Link: https://github.com/llvm/llvm-project/commit/568c23bbd…

• 기술 영역v4l2
• 문제work around
• 효과optimiz

관측 시점 2026-04-27T17:04:10+02:00

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / b0dbd5100b

pipeline: rpi: Make control lists in requests properly atomic When a request is about to be processed, this commit separates "delayed controls" (camera-related ones that take "a few frames" to apply) from "immediate controls" (ISP-related controls) that will happen instantly. The immediate controls are held back until…

• 기술 영역isp, synchronis, ipa
• 메커니즘sequence number
• 효과avoid

관측 시점 2026-05-08T13:57:43+01:00

raspberrypi/libcamera / src/android/meson.build / 2ca75f012f

android: Disable build on platforms without mbrtoc16() The Android camera HAL uses mbrtoc16(), which is not provided by uClibc. We could work around the issue by adding an implementation of the function to libcamera::utils (probably based on mbrtowc()). Usage of the Android camera HAL with uClibc however is such a nic…

• 기술 영역camera hal
• 문제work around
• 효과avoid

관측 시점 2026-05-07T20:09:10+03:00

raspberrypi/libcamera / src/ipa/libipa/camera_sensor_helper.cpp / 12b0844b06

ipa: libipa: camera_sensor_helper: Add OV2740 black level Set blackLevel_ = 4096 (0x40 at 10-bit) in CameraSensorHelperOv2740. The OV2740 kernel driver programs BLC target register 0x4003 with 0x40 for the 180 MHz link frequency mode. This matches the same pattern used by OV5675 and other OmniVision sensors with a 10-…

• 기술 영역ipa, black level, kernel driver
• 메커니즘calibrat

관측 시점 2026-05-06T15:46:42-06:00

raspberrypi/libcamera / include/libcamera/internal/software_isp/swstats_cpu.h / d3e76fe1d1

libcamera: software_isp: Normalize statistics sums to 8-bit The SWSTATS_ACCUMULATE_LINE_STATS() macro divides the luminance value for the histogram to normalize it to 8-bit range, but does not apply the same normalization to the RGB sums. For 10-bit and 12-bit unpacked Bayer formats this means the sums are accumulated…

• 기술 영역isp, bayer, awb, black level, debayer
• 문제mismatch

관측 시점 2026-05-06T15:46:28-06:00

raspberrypi/libcamera / src/ipa/simple/algorithms/agc.cpp / 6b5c42a9a9

ipa: simple: agc: Replace bang-bang controller with proportional The AGC's updateExposure() uses a fixed ~10% step per frame regardless of how far the current exposure is from optimal. With a hysteresis dead band of only +/-4%, the controller overshoots when the correct value falls within one step, causing visible bri…

• 기술 영역ipa, agc
• 문제flicker
• 메커니즘hysteresis
• 효과eliminat, prevent

관측 시점 2026-05-06T15:46:01-06:00

raspberrypi/libcamera / meson.build / 183e37362f

libcamera v0.7.1 This release brings 142 commits with the largest developments in the core of libcamera components. Perhaps the most obvious is that we now use C++20 for the project. The Configuration file handling has had a substantial rework with updates to the yaml_parser. The RKISP1 IPA has now added a new Hue con…

• 기술 영역ipa, throughput, pipeline handler, sensor mode, isp, agc, v4l2, debayer
• 문제work around
• 메커니즘lookup table
• 효과improv, lower, reduc
• 평가benchmark
• 사소한 변경rename, gitignore, add missing include, remove unused

관측 시점 2026-04-28T19:13:28+01:00

raspberrypi/libcamera / include/libcamera/ipa/vimc.mojom / bcaed97380

test: ipa: ipa_interface: Replace FIFO with pipe The ipa_interface unit test uses a FIFO to communicate with the vimc IPA module. FIFOs are named pipes, created in the file system. The path to the FIFO is hardcoded so that both the unit test and IPA module know where to locate the file. If the ipa_interface crashes fo…

• 기술 영역ipa
• 문제hardcoded

관측 시점 2025-10-20T19:03:17+03:00

raspberrypi/libcamera / src/ipa/rpi/pisp/pisp.cpp / 033bb2cce3

ipa: rpi: Fix gamma lookup table generation for PiSP platform generateLut was failing to fill in the final slope value, meaning that fully saturated pixels would full slightly short (the slope of the final piecewise linear segment would default to zero). The loop is slightly reorganised to fix the problem. Signed-off-…

• 기술 영역ipa, pisp
• 메커니즘lookup table

관측 시점 2026-03-27T09:02:43Z

raspberrypi/libcamera / include/libcamera/internal/software_isp/debayer_params.h / 0d3e543b4d

libcamera: software_isp: Set initial values of DebayerParams Debayer parameters and processing are currently run asynchronously. This can lead to assertion errors in case the processing tries to use not yet computed debayer parameters. To prevent this situation, specify some default values for DebayerParams members. T…

• 기술 영역isp, debayer
• 문제workaround
• 효과prevent

관측 시점 2026-02-23T15:19:45+01:00

raspberrypi/libcamera / src/ipa/simple/algorithms/awb.cpp / a1d272d7f1

ipa: simple: Remove duplicate header inclusion The Awb component already references libcamera/control_ids.h. Remove the incorrect duplicate inclusion of "control_ids.h". Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Milan Zamazal <mzamazal@redhat.com> Signed-off-by: Kieran Bingham <kieran.…

• 기술 영역ipa, awb
• 문제incorrect

관측 시점 2026-02-18T16:42:42Z

raspberrypi/libcamera / src/libcamera/software_isp/debayer.h / 78b9890a0f

libcamera: software_isp: debayer: Take `DebayerParams` by ref When calling `Debayer::process()` from `SoftwareIsp::process()`, the `DebayerParams` object is copied multiple times: (1) call of `BoundMethodMember<...>::activate()` inside `Object::invokeMethod()` (2) constructor of `BoundMethodArgs<...>` inside `BoundMet…

• 기술 영역isp, debayer, fps
• 문제not ideal
• 효과avoid

관측 시점 2026-01-20T17:20:34+01:00

raspberrypi/libcamera / src/ipa/simple/algorithms/awb.cpp / bb2e6d0833

libcamera: ipa: simple: Fix multiplication order in Awb The matrix multiplication in Awb is swapped: the gains should be applied after combinedMatrix, i.e. on the left side. The mistake happened when `ccm' was replaced with combinedMatrix and gainMatrix multiplication was moved to Awb. While CCM must be applied after …

• 기술 영역ipa, awb, ccm
• 문제wrong order

관측 시점 2026-02-03T12:53:26+01:00

raspberrypi/libcamera / meson.build / b7854fd07d

libcamera v0.7.0 This release brings 158 commits with substantial development on the SoftISP components. This brings in GPU acceleration, allowing us to get higher throughput for cameras using this pipeline. Further development to improve the image quality is ongoing now that we can perform more processing in realtime…

• 기술 영역throughput, image quality, pipeline handler, v4l2, isp, lsc, awb, ipa
• 문제workaround
• 메커니즘compensat, interpolat
• 효과higher throughput, improv, increas, avoid
• 평가benchmark
• 사소한 변경rename, revert , remove unused

관측 시점 2026-01-29T12:17:26Z

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / e8054c758c

ipa: rkisp1: lsc: Resample polynomial lens shading tables at configure time The lens shading correction is always applied based on the sensor crop bounds. This leads to incorrect lens shading correction for analog crops that do not cover the whole sensor. To fix that, we need to adapt the lens shading table for the se…

• 기술 영역ipa, lsc, lens shading, sensor crop
• 문제incorrect
• 효과improv

관측 시점 2026-01-28T17:00:30+01:00

raspberrypi/libcamera / src/ipa/libipa/interpolator.cpp / ee1d93d8aa

ipa: libipa: interpolator: Drop key quantization The quantization of the interpolation key was only used by the LSC algorithm. There it lead to difficult to read code was removed. As there is no remaining user of it, drop it from the Interpolator class. While at it, cleanup the includes. Signed-off-by: Stefan Klug <st…

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-01-28T17:00:27+01:00

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / 3bfc71345f

ipa: rkisp1: lsc: Handle quantization locally The quantization functionality in the Interpolator type hinders in writing nice code. Don't use it and implement the functionality directly in the algorithm. While at it, reduce the threshold to half of the quantization step size, otherwise it might happen that we skip a f…

• 기술 영역ipa, lsc
• 메커니즘interpolat
• 효과reduc
• 사소한 변경rename

관측 시점 2026-01-28T17:00:26+01:00

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.h / 71c2e858d8

ipa: rkisp1: lsc: Drop unused function declaration The interpolateTable() function is not implemented anywhere. Drop the declaration. Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-01-28T17:00:19+01:00

raspberrypi/libcamera / include/libcamera/internal/software_isp/debayer_params.h / 3ffaa4c0e2

libcamera: ipa: simple: Remove Lut algorithm The Lut algorithm is not really an algorithm. Moreover, algorithms may be enabled or disabled but with Lut disabled, nothing will work. Let's move the construction of lookup tables to CPU debayering, where it is used. The implied and related changes are: - DebayerParams is …

• 기술 영역ipa, isp
• 메커니즘lookup table

관측 시점 2026-01-28T12:44:01+01:00

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / b9b53845fe

v4l2: v4l2_camera_proxy: Fix for getting default FrameDurationLimits The default values for controls::FrameDurationLimits is now an array but the v4l2 proxy is fetching it as a scalar value, causing a runtime error. Fix this by templating the getter with the correct Span<const int64_t, 2> type. This fix also requires …

• 기술 영역v4l2, ipa
• 문제hard coded

관측 시점 2026-01-06T09:37:30Z

raspberrypi/libcamera / src/libcamera/base/event_dispatcher_poll.cpp / fa22b4ffef

libcamera: base: event_dispatcher_poll: Dispatch `POLLPRI` first When `poll()` returns multiple events for a given file descriptor, while there is no general rule that requires it, for the use cases of libcamera, it is better to service priority events first. So dispatch those first, and not last. For example, a V4L2 …

• 기술 영역dispatch, v4l2, schedul
• 메커니즘state machine

관측 시점 2026-01-06T13:11:57+01:00

raspberrypi/libcamera / src/libcamera/shaders/bayer_1x_packed.frag / 46aac79a44

libcamera: shaders: Add support for Gamma Add gamma compensation to the debayer shaders after colour correction is applied. Similarly only apply the calculated Gamma curve when using the CCM as the lookup tables already contain the data. Suggested-by: Milan Zamazal <mzamazal@redhat.com> Reviewed-by: Milan Zamazal <mza…

• 기술 영역debayer, gamma curve, ccm
• 메커니즘compensat

관측 시점 2026-01-06T17:00:45Z

raspberrypi/libcamera / src/libcamera/shaders/bayer_1x_packed.frag / 6029dcf9a6

libcamera: shaders: Add support for black level compensation Add the ability to apply a int blacklevel subtraction against the demosaiced data prior to application of colour correction data. Reviewed-by: Milan Zamazal <mzamazal@redhat.com> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Reviewed-by: Kiera…

• 기술 영역black level, demosaic
• 메커니즘compensat

관측 시점 2026-01-06T17:00:44Z

raspberrypi/libcamera / PR #284

panded pixel values. By enabling this in the PiSP, we offload the processing to dedicated hardware, improve performa

• 기술 영역ipa, pisp, isp, tuning file, kernel driver
• 메커니즘offload
• 효과improv

관측 시점 2025-10-01T09:04:14Z

raspberrypi/libcamera / PR #270

user-specified manual setting. without significant regression or making the code too messy.

• 기술 영역autofocus, tuning file, lens position
• 문제regression
• 효과improv, reduc

관측 시점 2025-07-04T10:55:49Z

raspberrypi/libcamera / PR #218

Check for unsupported pixel format If an unsupported pixel format is handed

• 기술 영역pisp
• 문제unsupported
• 평가reproduc

관측 시점 2025-06-03T08:21:29Z

raspberrypi/libcamera / PR #257

in the ctt. The first is a bug in the lens shading calibration measurement, which is now fixed. The second occurs

• 기술 영역lens shading
• 메커니즘calibrat

관측 시점 2025-04-28T10:31:11Z

raspberrypi/libcamera / PR #142

d to the config file which we pass to the lens shading calibration. This clamps the maximum luminance gain that gets writ

• 기술 영역lsc, lens shading
• 메커니즘calibrat
• 효과prevent

관측 시점 2024-06-14T08:13:05Z

raspberrypi/libcamera / PR #73

libcamera: controls: Add controls for AEC/AGC flicker avoidance Flicker is the term used to describe brightn

• 기술 영역aec, agc
• 문제flicker, banding
• 효과avoid

관측 시점 2023-08-04T11:03:39Z

raspberrypi/libcamera / PR #74

libcamera: controls: Add controls for AEC/AGC flicker avoidance Flicker is the term used to describe brightn

• 기술 영역aec, agc
• 문제flicker, banding
• 효과avoid

관측 시점 2023-08-04T11:03:38Z

raspberrypi/libcamera / PR #72

libcamera: controls: Add controls for AEC/AGC flicker avoidance Flicker is the term used to describe brightn

• 기술 영역aec, agc
• 문제flicker, banding
• 효과avoid

관측 시점 2023-08-04T08:32:10Z

raspberrypi/libcamera / Issue #359

ntrol was introduced for: dark frame and bad pixel map calibration needs the sensor temperature recorded per captured fra

• 기술 영역ipa, exposure time, frame length, line length
• 메커니즘calibrat
• 평가reproduc

관측 시점 2026-09-07T07:57:19Z

raspberrypi/libcamera / Issue #355

IMX500 sensor state machine fails ("failed to load loader firmware") during sustai

• 기술 영역framerate, v4l2, subdev, videobuf2, vb2_, throttl, thermal, object detection
• 문제timeout
• 메커니즘state machine
• 효과reduc
• 평가reproduc

관측 시점 2026-08-17T09:52:57Z

raspberrypi/libcamera / Issue #352

ash in the first way (it just hangs forever, even with timeout set), so attached is a output from a run with the seco

• 기술 영역sensor mode, frame rate, fps
• 문제timeout
• 효과lower
• 평가reproduc

관측 시점 2026-08-05T03:55:35Z

raspberrypi/libcamera / Issue #350

f the box. I'd be awesome if it was documented how to work around these issues. ``` v4l2: Current input: "unicam-image"

• 기술 영역v4l2, camera stack, fps
• 문제work around

관측 시점 2026-08-04T13:37:09Z

raspberrypi/libcamera / Issue #341

Overexposed pixels turning purple/magenta Issue: Overexposed pixe

• 기술 영역ccm, pisp
• 문제overexpos
• 효과avoid

관측 시점 2026-07-16T07:33:01Z

raspberrypi/libcamera / Issue #344

out of order frames when recording with libcamera-raw For a scienti

• 기술 영역fps
• 문제out of order, known issue

관측 시점 2026-06-30T10:03:25Z

raspberrypi/libcamera / Issue #339

Segfault with non zero camera_timeout_value_ms I have a pi5 using the official global shutte

• 기술 영역global shutter
• 문제timeout

관측 시점 2026-06-10T12:43:42Z

raspberrypi/libcamera / Issue #336

IMX219 - inconsistent frame rate Hi, I'm working on IM219, - ran gstreamer p

• 기술 영역frame rate, fps
• 문제inconsistent

관측 시점 2026-05-22T06:45:55Z

raspberrypi/libcamera / Issue #337

Incorrect color with Raspberry Pi Global Shutter camera My Raspb

• 기술 영역global shutter
• 문제incorrect

관측 시점 2026-05-22T06:45:29Z

raspberrypi/libcamera / Issue #322

s to begin creating frames ``` rpicam-vid --camera 0 --timeout 0 --codec mjpeg --segment 1 --mode 1280:800:10 --frame

• 기술 영역framerate, fps, multi camera, synchroniz
• 문제timeout
• 효과save
• 평가reproduc

관측 시점 2026-03-31T07:42:51Z

raspberrypi/libcamera / Issue #331

idence Exposure received in 141.0479s (+125.5345s) ## Workaround Disabling AWB completely (both day and night) resolves

• 기술 영역awb, night mode, exposure time, overhead
• 문제workaround
• 평가reproduc

관측 시점 2026-03-23T14:59:14Z

raspberrypi/libcamera / Issue #317

this silently ignores the auto exposure mode. The only work around I have is to (1) start the camera with shutter and gai

• 기술 영역agc, auto exposure
• 문제work around

관측 시점 2025-11-14T07:40:34Z

raspberrypi/libcamera / Issue #308

Libcamera FPS regression I have a raspberry pi 5 with a camera v2 module (imx21

• 기술 영역fps
• 문제regression, workaround

관측 시점 2025-09-23T21:53:54Z

raspberrypi/libcamera / Issue #234

ing or metadata. (might be somewhere gst_libcamera_src_negotiate and GstVideoFormat ???) Here's what the camera list l

• 기술 영역framerate, fps
• 문제corrupt
• 메커니즘negotiat

관측 시점 2025-07-18T09:36:37Z

raspberrypi/libcamera / Issue #267

] [265] ERROR IPCPipe ipc_pipe_unixsocket.cpp:134 Call timeout! [0:05:59.429475071] [265] ERROR IPCPipe ipc_pipe_unix

• 기술 영역ipa, camera manager, media device, isp, pipeline handler, dma buf, v4l2, analogue gain
• 문제unsupported, timeout

관측 시점 2025-06-12T08:15:56Z

raspberrypi/libcamera / Issue #271

R10_1X10 - Selected CFE format: 2304x1296-PC1B dmaHeap allocation failure for rpicam-apps0 ERROR: *** failed to allocate capture

• 기술 영역camera manager, pisp, isp, stream configuration
• 문제allocation failure

관측 시점 2025-06-05T07:55:08Z

raspberrypi/libcamera / Issue #258

e "pispbe" [9:49:27.593620622] [181259] DEBUG ClockRec clock_recovery.cpp:69 configure 100 2000 10 50000 [9:49:27.593640289]

• 기술 영역ipa, pisp, camera manager, media device, pipeline handler, v4l2, auto exposure, 3a
• 문제timeout, unsupported
• 메커니즘calibrat, clock recovery

관측 시점 2025-04-25T15:28:53Z

raspberrypi/libcamera / Issue #255

noise [0:22:48.865463230] [5151] WARN RPI vc4.cpp:393 Mismatch between Unicam and CamHelper for embedded data usage!

• 기술 영역fps, camera manager, denoise, isp, stream configuration, v4l2
• 문제mismatch

관측 시점 2025-04-25T07:43:16Z

raspberrypi/libcamera / Issue #254

4-2b2cb15547c0) I am facing some error during the AWB calibration: SVD did not converge in Linear Least Squares. (cf att

• 기술 영역tuning file, awb, black level, pisp
• 메커니즘calibrat

관측 시점 2025-04-23T07:55:43Z

raspberrypi/libcamera / Issue #243

ver there are new issues to contend with. I have image artifacts for nearly all the sensor modes. ``` SRGGB10_CSI2P

• 기술 영역v4l2, subdev, pisp
• 문제artifact

관측 시점 2025-03-22T01:34:19Z

raspberrypi/libcamera / Issue #203

up=1 # Run in 64-bit mode arm_64bit=1 # Disable compensation for displays with overscan disable_overscan=1 # Ru

• 기술 영역camera manager, denoise, isp, stream configuration, v4l2
• 문제timeout
• 메커니즘compensat

관측 시점 2025-03-13T11:40:45Z

raspberrypi/libcamera / Issue #236

er would limit the amount of light captured to prevent overexposure. However, after searching online, I haven’t found any

• 기술 영역analogue gain
• 문제overexpos
• 효과reduc, eliminat, prevent

관측 시점 2025-03-03T15:25:00Z

raspberrypi/libcamera / Issue #230

04:17.851426528] [873] DEBUG RPiAlsc alsc.cpp:140 Read calibrations_Cr calibration for ct 3000 [0:04:17.851662615] [873] DEBU

• 기술 영역camera manager, pisp, isp, ipa, media device, pipeline handler, v4l2, analogue gain
• 메커니즘calibrat

관측 시점 2025-01-20T14:00:20Z

raspberrypi/libcamera / Issue #228

an someone point to the reason for this assertion? Any race condition could cause this? I suspect requestCompleted gets c

• 기술 영역framerate
• 문제race condition

관측 시점 2025-01-09T09:05:08Z

raspberrypi/libcamera / Issue #221

code is available here: https://github.com/RobMeades/watchdog/blob/2630be18cc6108a74ec3b37eb8241953a899d822/software

• 기술 영역fps, mmap, pipeline handler, pisp, v4l2, dispatch, camera manager
• 메커니즘watchdog

관측 시점 2024-12-13T07:43:03Z

raspberrypi/libcamera / Issue #172

se.cpp:228 Invalid sensor configuration: bitDepth/size mismatch [2:51:25.496768637] [2915] ERROR RPI pipeline_base.cp

• 기술 영역pisp, denoise, framerate, awb, camera manager, isp, sensor configuration
• 문제mismatch

관측 시점 2024-12-13T05:20:18Z

raspberrypi/libcamera / Issue #213

[10191] ERROR IPCPipe ipc_pipe_unixsocket.cpp:134 Call timeout! [5:20:34.449811560] [10191] ERROR IPCPipe ipc_pipe_u

• 기술 영역pisp, ipa, global shutter
• 문제timeout

관측 시점 2024-11-26T16:27:20Z

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / 8af719b995

ipa: libipa: lsc: Re-sort lsc.cpp The LscAlgorithm and LscAlgorithmBase classes implementations had not been resorted in the previous patch to keep the diff short. Re-sort the documentation of the LscAlgorithmBase and LscAlgorithm classes to match the declaration order. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideaso…

• 기술 영역ipa, lsc, tuning file
• 문제unsupported

관측 시점 2026-07-20T13:08:01+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / adf284506a

ipa: libipa: lsc: Quantize gains in LscAlgorithm Template the LscAlgorithm class with the LSC engine register format and make lsc::Components<> parameteric on the type used to store the quantized LSC gains. This allows to quantize gains in the LscAlgorithm class and not in the IPA modules. Move the Components<> and Co…

• 기술 영역ipa, lsc, tuning file
• 메커니즘interpolat

관측 시점 2026-07-20T13:03:13+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / 676140a4c7

ipa: libipa: lsc: Make Components a map<> The current definition of lsc::Components assumes 4 gain vectors named after the colour components supported by the RkISP1 ISP (r, gr, gb and b). As different ISP support different colour channels for their Lsc tables make lsc::Components a map that associates the name of the …

• 기술 영역ipa, lsc, isp, tuning file
• 메커니즘interpolat

관측 시점 2026-07-02T11:59:12+02:00

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / 88b979dc37

ipa: rkisp1: lsc: Port to use LscAlgorithm Port the RkISP1 LSC algorithm to use the LscAlgorithm class by composition. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

• 기술 영역ipa, lsc, tuning file
• 문제unsupported
• 메커니즘interpolat

관측 시점 2026-07-01T15:33:16+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc.cpp / afccf69edc

ipa: libipa: lsc: Introduce LscAlgorithm Introduce the lsc.h and lsc.cpp files with the definition of the Lsc algorithm active state, frame context and the LscAlgorithm class. The LscAlgorithm class uses two backends (LscPolynomial and LscTable) to perform tuning file parsing and re-scaling of the LSC gains. Signed-of…

• 기술 영역ipa, lsc, tuning file, lens shading, sensor configuration
• 메커니즘characteris, compensat, interpolat

관측 시점 2026-07-01T11:30:10+02:00

raspberrypi/libcamera / src/ipa/libipa/lsc_polynomial.cpp / b4505e47d8

ipa: libipa: lsc_polynomial: Move LscPolynomial from RkISP1 Move the LscPolynomial class to libipa from RkISP1. Rename the class from LscPolynomialImpl to a simpler LscPolynomial. The class is copied verbatim, only documentation has been added. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: K…

• 기술 영역ipa, lsc, lens shading, tuning file, sensor configuration, sensor crop
• 문제artifact
• 사소한 변경rename

관측 시점 2026-07-01T10:09:20+02:00

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / e27f354289

ipa: rkisp1: lsc: Re-architecture Lsc support The RkISP1 LSC implementation is realized by the following components: - 2 "tuning file" parser classes: - LscPolynomialLoader - LscTableLoader which implement the "parseLscData" function that loads from tuning file a polynomial representation of the lsc gains or a table of gains respectively. - A hierachy of "ShadingDescriptors" - LscPolynomialShadin…

• 기술 영역ipa, lsc, tuning file, lens shading
• 메커니즘characteris, compensat
• 제거된 이전 방식characteris, compensat

관측 시점 2026-06-30T13:52:52+02:00

raspberrypi/libcamera / include/linux/media/arm/mali-c55-config.h / 9e3a6ca3c2

include: linux: mali-c55: Update to support CCM and Gamma Update the Mali-C55 uAPI header to add support for CCM and the RGB Gamma. Support for CCM and RGB Gamma have been added to the Mali-C55 driver in Linux v7.3 by commits: - bb401df68c06 ("media: mali-c55: Add support for CCM") - 6962703102c4 ("media: mali-c55: Ad…

• 기술 영역ccm, demosaic, v4l2, isp, gamma curve
• 메커니즘correction curve

관측 시점 2026-06-16T15:37:13+02:00

raspberrypi/libcamera / src/ipa/simple/algorithms/ccm.cpp / c875f02456

ipa: simple: Port to use libipa CcmAlgorithm Now that libipa provides a common CCM algorithm implementation, replace the custom handling with the common Ccm. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Tested-by: Robert Mader <robert.mader@collabora.com> Reviewed-by: Milan Zamazal <mzamazal@redhat.com> Tested-by: Mila…

• 기술 영역ipa, ccm, tuning file, awb
• 메커니즘interpolat
• 제거된 이전 방식interpolat

관측 시점 2026-05-20T23:52:35+02:00

raspberrypi/libcamera / src/ipa/libipa/meson.build / 5e18619390

ipa: libipa: Introduce V4L2Stats Add a V4L2Stats class similar in spirit to the existing V4L2Params class to allow IPA modules to easily sub-class it to access ISP statistics blocks serialized into a v4l2_isp_buffer. Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingha…

• 기술 영역ipa, isp, v4l2
• 문제mismatch, unsupported
• 효과avoid

관측 시점 2026-04-22T17:38:20+02:00

raspberrypi/libcamera / src/libcamera/software_isp/debayer.cpp / 244572db3e

libcamera: debayer: Use helpers for strides and frame sizes Clean up some open-coded logic, making the code shorter, more generic and easier to follow. Signed-off-by: Robert Mader <robert.mader@collabora.com> Reviewed-by: Milan Zamazal <mzamazal@redhat.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.co…

• 기술 영역debayer
• 문제unsupported

관측 시점 2026-07-20T13:39:35+02:00

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / 13f7b921ac

libcamera: software_isp: debayer_egl: Implement input/output frame caching mechanism Implement a texture caching mechanism for both input and output frames and for both types of input frame. The before/after on a Qualcomm x1e is: 9.737ms per frame 5.691ms per frame The before/after on a Qualcomm sm8250 is: 21.710ms pe…

• 기술 영역isp, debayer, dmabuf, mmap
• 문제slow path

관측 시점 2026-07-06T23:22:45+01:00

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/cproc.cpp / ab3fb363d8

ipa: rkisp1: cproc: Fix brightness and contrast value handling By reverse engineering it was discovered that the transfer curve applied by the CPROC module is Yout = Yin * contrast + brightness/2. However the most common expectation on contrast is to not change the middle gray of an image. So the expected curve is: Yo…

• 기술 영역ipa
• 메커니즘compensat

관측 시점 2026-06-16T16:28:55+02:00

raspberrypi/libcamera / src/ipa/libipa/lux.cpp / 1e1eecc3f3

libcamera: Replace last mentions of YAML A few comments and log messages still mention YAML while they now relate to code operating on ValueNode. Replace them with value node or tuning data as appropriate for the context. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Barnabás Pőcze <…

• 기술 영역tuning file, lens shading
• 메커니즘compensat

관측 시점 2026-06-03T22:11:28+03:00

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/delayed_controls.cpp / 2c0c52be1a

pipeline: rpi: Simplify delayed controls The queueCount_ value is redundant and can be removed. The pipeline handler calls the push and applyControls functions in a an interleaved manner, so queueCount_ was merely tracking writeCount_, and is therefore unnecessary. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Jacopo …

• 기술 영역pipeline handler
• 메커니즘sequence number, ring buffer
• 효과guarantee, increas
• 제거된 이전 방식sequence number

관측 시점 2026-05-08T13:57:41+01:00

raspberrypi/libcamera / Documentation/guides/pipeline-handler.rst / Prerequisite knowledge: system architecture / L12

rough a data and control bus. The presence, number and characteristics of them vary depending on the system design and the pr

• 기술 영역pipeline handler, image signal processor, isp, instrument, bayer, processing pipeline
• 메커니즘characteris

raspberrypi/libcamera / Documentation/guides/pipeline-handler.rst / Prerequisite knowledge: libcamera architecture / L75

tured images, and to advertise the immutable camera characteristics enumerated at system initialization time. Creating a

• 기술 영역pipeline handler, media device, ipa, media controller, v4l2, capture session, processing pipeline
• 메커니즘characteris

raspberrypi/libcamera / Documentation/guides/pipeline-handler.rst / Registering controls and properties / L561

sociated with immutable values, which represent static characteristics that can be used by applications to identify camera de

• 기술 영역ipa, pipeline handler, v4l2
• 메커니즘characteris

raspberrypi/libcamera / Documentation/guides/pipeline-handler.rst / Queuing requests between applications and hardware / L1203

cations and hardware libcamera implements a streaming model based on capture requests queued by an application to the ``

• 기술 영역capture request, pipeline handler
• 메커니즘model based

raspberrypi/libcamera / Documentation/guides/pipeline-handler.rst / Testing a pipeline handler / L1410

18462130] [186470] WARN V4L2 v4l2_pixelformat.cpp:176 Unsupported V4L2 pixel format Y10 ... <remaining Unsupported V4

• 기술 영역pipeline handler, ipa, camera manager, v4l2, fps, zero copy
• 문제unsupported

raspberrypi/libcamera / Documentation/sensor_driver_requirements.rst / Mandatory Requirements / L21

is requirement will need to be adapted or will produce incorrect results. The ``HBLANK``, ``PIXEL_RATE`` and ``VBLANK`

• 기술 영역sensor driver, v4l2, analogue gain, hblank, vblank
• 문제incorrect

raspberrypi/libcamera / src/android/camera_capabilities.cpp / CameraCapabilities::initializeStaticMetadata / L762-L1483

L_AE_AVAILABLE_TARGET_FPS_RANGES, ANDROID_CONTROL_AE_COMPENSATION_RANGE, ANDROID_CONTROL_AE_COMPENSATION_STEP, ANDROID_CON

• 기술 영역camera configuration, fps, awb, noise reduction
• 문제stall
• 메커니즘compensat, characteris
• 효과reduc

관측 시점 2026-09-18T11:10:49+02:00 · 최초 발견 commit fd88c9fa80

raspberrypi/libcamera / src/android/camera_capabilities.cpp / CameraCapabilities::requestTemplatePreview / L1512-L1613

requestTemplate->addEntry(ANDROID_CONTROL_AE_EXPOSURE_COMPENSATION, aeExposureCompensation); uint8_t aePrecapture

• 기술 영역request template, fps, camera_metadata, awb
• 메커니즘compensat
• 효과avoid

관측 시점 2026-09-18T11:10:49+02:00 · 최초 발견 commit fd88c9fa80

raspberrypi/libcamera / src/android/jpeg/post_processor_jpeg.cpp / PostProcessorJpeg::configure / L36-L60

f (inCfg.size != outCfg.size) { LOG(JPEG, Error) << "Mismatch of input and output stream sizes"; return -EINVAL;

• 기술 영역stream configuration
• 문제mismatch

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/apps/cam/sdl_sink.cpp / SDLSink::configure / L87-L122

RMAT_NV21, cfg.stride); #endif else { std::cerr << "Unsupported pixel format " << cfg.pixelFormat << std::endl; retu

• 기술 영역camera configuration, stream configuration
• 문제unsupported

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/apps/common/dng_writer.cpp / DNGWriter::write / L522-L809

rmat); if (it == formatInfo.cend()) { std::cerr << "Unsupported pixel format" << std::endl; return -EINVAL; } cons

• 기술 영역white balance, stream configuration
• 문제unsupported
• 효과save, reduc
• 평가baseline

raspberrypi/libcamera / src/apps/lc-compliance/helpers/capture.cpp / Capture::start / L115-L156

(stream); ASSERT_EQ(buffers.size(), bufferCount) << "Mismatching buffer count"; for (std::size_t i = 0; i < bufferCo

• 기술 영역capture request
• 문제mismatch

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / GstLibcameraSrcState / L105-L136

Used for C++ object with destructors.

• 기술 영역camera manager, camera configuration
• 문제contention
• 효과minimiz

관측 시점 2026-08-18T18:45:07+09:00 · 최초 발견 commit 94d1744209

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / GstLibcameraSrcState::processRequest / L334-L451

Must be called with stream_lock held.

• 기술 영역buffer pool, latency, stream configuration
• 메커니즘negotiat

관측 시점 2026-08-18T18:45:07+09:00 · 최초 발견 commit 94d1744209

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / gst_libcamera_create_video_pool / L537-L584

\brief Create a video pool for a pad \param[in] self The libcamerasrc instance \param[in] srcpad The pad \param[in] caps The pad caps \param[in] info The video info for the pad This function creates and returns a video buffer pool for the given pad if needed to accommodate stride mismatch. If the peer element supports…

• 기술 영역buffer pool
• 문제mismatch
• 메커니즘negotiat

관측 시점 2026-08-18T18:45:07+09:00 · 최초 발견 commit 94d1744209

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / gst_libcamera_src_negotiate / L587-L706

Must be called with stream_lock held.

• 기술 영역framerate, stream configuration, camera configuration
• 메커니즘negotiat

관측 시점 2026-08-18T18:45:07+09:00 · 최초 발견 commit 94d1744209

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / gst_libcamera_src_task_run / L708-L826

/* * Caps may gain extra fields after the initial negotiation (e.g. * colorimetry added by a downstream element)

• 기술 영역request completion
• 메커니즘negotiat
• 효과guarantee

raspberrypi/libcamera / src/gstreamer/gstlibcamerasrc.cpp / gst_libcamera_src_class_init / L1203-L1252

,depth=10\"). " "Leave unset to let the pipeline negotiate the sensor mode automatically.", GST_TYPE_STRUCT

• 기술 영역sensor configuration, sensor mode
• 메커니즘negotiat

관측 시점 2026-08-18T18:45:07+09:00 · 최초 발견 commit 94d1744209

raspberrypi/libcamera / src/ipa/ipu3/algorithms/agc.cpp / Agc::parseStatistics / L117-L148

green value to estimate the * brightness. Even the overexposed pixels are * taken into account. */ hist[(c

• 기술 영역agc, 3a, awb
• 문제overexpos

raspberrypi/libcamera / src/ipa/ipu3/algorithms/agc.cpp / Agc::process / L215-L234

\brief Process IPU3 statistics, and run AGC operations \param[in] context The shared IPA context \param[in] frame The current frame sequence number \param[in] frameContext The current frame context \param[in] stats The IPU3 statistics and ISP results \param[out] metadata Metadata for the frame, to be filled by the alg…

• 기술 영역agc, ipa, isp, 3a, awb
• 메커니즘sequence number

관측 시점 2026-09-14T15:53:44+01:00 · 최초 발견 commit b95dd9d149

raspberrypi/libcamera / src/ipa/ipu3/algorithms/tone_mapping.cpp / ToneMapping::prepare / L77-L98

\brief Fill in the parameter structure, and enable gamma control \param[in] context The shared IPA context \param[in] frame The frame context sequence number \param[in] frameContext The FrameContext for this frame \param[out] params The IPU3 parameters Populate the IPU3 parameter structure with our tone mapping look u…

• 기술 영역ipa, tonemap
• 메커니즘sequence number

관측 시점 2026-09-14T15:53:47+01:00 · 최초 발견 commit c013a17a53

raspberrypi/libcamera / src/ipa/ipu3/algorithms/tone_mapping.cpp / ToneMapping::process / L111-L118

\brief Calculate the tone mapping look up table \param[in] context The shared IPA context \param[in] frame The current frame sequence number \param[in] frameContext The current frame context \param[in] stats The IPU3 statistics and ISP results \param[out] metadata Metadata for the frame, to be filled by the algorithm …

• 기술 영역ipa, isp, tonemap, 3a
• 메커니즘sequence number

관측 시점 2026-09-14T15:53:47+01:00 · 최초 발견 commit c013a17a53

raspberrypi/libcamera / src/ipa/ipu3/ipu3.cpp / IPAIPU3 / L139-L179

The IPU3 ImgU has further processing blocks to support image quality improvements through bayer and temporal noise reductions, however those are not supported in the current implementation, and will use default settings as provided by the kernel driver. Demosaicing is operating with the default parameters and could be…

• 기술 영역image quality, bayer, kernel driver, demosaic, sharpen, black level, lens shading, ccm
• 문제artifact
• 메커니즘compensat
• 효과improv, reduc, optimis

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/ipu3/ipu3.cpp / IPAIPU3::computeParams / L447-L476

\brief Fill and return a buffer with ISP processing parameters for a frame \param[in] frame The frame number \param[in] bufferId ID of the parameter buffer to fill Algorithms are expected to fill the IPU3 parameter buffer for the next frame given their most recent processing of the ImgU statistics.

• 기술 영역isp, ipa
• 문제expensive operation

raspberrypi/libcamera / src/ipa/libipa/agc_mean_luminance.cpp / AgcMeanLuminance::effectiveYTarget / L548-L576

\brief Get the currently effective y target \param[in] lux The effective lux value \param[in] exposureCompensation The exposure compensation value This function returns the current y target including exposure compensation. \return The y target value

• 기술 영역agc
• 메커니즘compensat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/agc_mean_luminance.cpp / AgcMeanLuminance::filterExposure / L588-L609

\brief Apply a filter on the exposure value to limit the speed of changes \param[in] exposureValue The target exposure from the AGC algorithm The speed of the filter is adaptive, and will produce the target quicker during startup, or when the target exposure is within 20% of the most recent filter output. \return The …

• 기술 영역agc
• 메커니즘adaptive
• 효과faster, avoid

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/agc_mean_luminance.cpp / AgcMeanLuminance::calculateNewEv / L659-L702

\brief Calculate the new exposure value and split it between exposure time and gain \param[in] params The set of parameters for the exppsure value calculation Calculate a new exposure value to try to obtain the target. The calculated exposure value is filtered to prevent rapid changes from frame to frame, and divided …

• 기술 영역agc, exposure time, digital gain, analogue gain, pipeline handler, sensor driver
• 메커니즘compensat
• 효과prevent

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/agc_mean_luminance.h / libcamera / L22-L99

include "exposure_mode_helper.h" include "histogram.h" include "pwl.h"

• 기술 영역ipa, agc, exposure time
• 메커니즘compensat
• 효과lower

관측 시점 2025-11-14T15:17:10+01:00 · 최초 발견 commit 63f9b4e5d9

raspberrypi/libcamera / src/ipa/libipa/awb.cpp / AwbAlgorithmBase::queueRequest / L277-L334

\param[in] state The AWB active state \param[in] frame The frame number \param[in] frameContext The AWB frame context \param[in] controls The list of controls part of the Request Queue a new Request to the AWB algorithm and modify its behaviour according to the provided controls. The currently handled controls are: - …

• 기술 영역awb, request queue
• 문제unsupported, incorrect

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.cpp / AwbBayes::gainsFromColourTemperature / L260-L269

\brief Compute white balance gains from a colour temperature \param[in] colourTemperature The colour temperature in Kelvin Compute the white balance gains from a \a colourTemperature. This function does not take any statistics into account. It simply interpolates the colour gains curve on a new colour temperature. \re…

• 기술 영역awb, white balance
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.cpp / AwbBayes::calculateAwb / L271-L307

prior = priors_.getInterpolated(lux);

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.cpp / AwbBayes::coarseSearch / L309-L366

oint of the search, but refine it with a quadratic * interpolation around its neighbors. */ if (points.size() > 2) {

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.cpp / AwbBayes::fineSearch / L368-L464

ely across the CT curve, * now let's do a quadratic interpolation for the best result. */ bestPoint = std::clamp(be

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat
• 효과increas

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.cpp / AwbBayes::interpolateQuadratic / L477-L491

\brief Find extremum of function \param[in] a First point \param[in] b Second point \param[in] c Third point Given 3 points on a curve, find the extremum of the function in that interval by fitting a quadratic. \return The x value of the extremum clamped to the interval [a.x(), c.x()]

• 기술 영역awb
• 문제quadratic
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.h / libcamera / L21-L61

include "awb.h" include "interpolator.h" include "pwl.h"

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.h / ipa / L23-L59

&stats, std::span<double> range) const; double interpolateQuadratic(ipa::Pwl::Point const &a, ipa::Pwl::Point cons

• 기술 영역ipa, awb
• 문제quadratic
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_bayes.h / AwbImplementation / L25-L57

&stats, std::span<double> range) const; double interpolateQuadratic(ipa::Pwl::Point const &a, ipa::Pwl::Point cons

• 기술 영역awb, ipa
• 문제quadratic
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/awb_grey.cpp / AwbGrey::init / L44-L57

\brief Initialize the algorithm with the given tuning data \param[in] tuningData The tuning data for the algorithm Load the colour temperature curve from the tuning data. If there is no tuning data available, continue with a warning. Manual colour temperature will not work in that case. \return 0 on success, a negativ…

• 기술 영역awb, tuning file
• 메커니즘interpolat

관측 시점 2026-09-14T15:53:41+01:00 · 최초 발견 commit 8eae7a66fa

raspberrypi/libcamera / src/ipa/libipa/awb_grey.cpp / AwbGrey::calculateAwb / L74-L91

\brief Calculate AWB data from the given statistics \param[in] stats The statistics to use for the calculation \param[in] lux The lux value of the scene \param[in] range The colour temperature search limits The colour temperature is estimated based on the colours::estimateCCT() function. The gains are calculated purel…

• 기술 영역awb
• 문제hardcoded
• 효과avoid

raspberrypi/libcamera / src/ipa/libipa/awb_grey.cpp / AwbGrey::gainsFromColourTemperature / L104-L114

\brief Compute white balance gains from a colour temperature \param[in] colourTemperature The colour temperature in Kelvin Compute the white balance gains from a \a colourTemperature. This function does not take any statistics into account. It simply interpolates the colour gains curve (if provided in the tuning file)…

• 기술 영역awb, white balance, tuning file
• 메커니즘interpolat

관측 시점 2026-09-14T15:53:41+01:00 · 최초 발견 commit 8eae7a66fa

raspberrypi/libcamera / src/ipa/libipa/camera_sensor_helper.cpp / CameraSensorHelperAr0144 / L383-L470

{ /* The recommended minimum gain is 1.6842 to avoid artifacts. */ gain = std::clamp(gain, 1.0 / (1.0 - 13.0 / 32.0

• 기술 영역analogue gain, black level
• 문제artifact
• 효과avoid, lower

관측 시점 2026-09-15T13:37:30+02:00 · 최초 발견 commit 0024628dae

raspberrypi/libcamera / src/ipa/libipa/camera_sensor_helper.cpp / gainCode / L392-L417

{ /* The recommended minimum gain is 1.6842 to avoid artifacts. */ gain = std::clamp(gain, 1.0 / (1.0 - 13.0 / 32.0

• 기술 영역analogue gain
• 문제artifact
• 효과avoid

raspberrypi/libcamera / src/ipa/libipa/histogram.cpp / Histogram::interQuantileMean / L155-L189

\brief Calculate the mean between two quantiles \param[in] lowQuantile low Quantile \param[in] highQuantile high Quantile Quantiles are not ideal for metering as they suffer several limitations. Instead, a concept is introduced here: inter-quantile mean. It returns the mean of all pixels between lowQuantile and highQu…

• 기술 영역metering
• 문제not ideal

raspberrypi/libcamera / src/ipa/libipa/lsc_base.h / libcamera / L21-L50

include "interpolator.h"

• 기술 영역ipa, lsc
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/libipa/meson.build

'fixedpoint.h', 'gamma.h', 'histogram.h', 'interpolator.h', 'lsc.h', 'lsc_base.h', 'lsc_polynomial

• 기술 영역agc, awb, ccm, lsc, v4l2, ipa
• 메커니즘interpolat

raspberrypi/libcamera / src/ipa/libipa/v4l2_params.cpp / V4L2ParamsBase::block / L170-L212

\brief Populate an ISP configuration block a returns a reference to its memory \param[in] type The ISP block identifier enumerated by the IPA module \param[in] blockType The kernel-defined ISP block identifier, used to populate the block header \param[in] blockSize The ISP block size, used to populate the block header…

• 기술 영역isp, ipa, v4l2
• 문제mismatch

raspberrypi/libcamera / src/ipa/libipa/v4l2_stats.cpp / V4L2StatsBase::V4L2StatsBase / L57-L108

\brief Construct an instance of V4L2StatsBase \param[in] data Reference to the v4l2-buffer memory mapped area \param[in] version The ISP parameters version the implementation supports Parse the statistics buffer and construct a cache that maps a block type to the memory location of a statistics block in the buffer. Af…

• 기술 영역v4l2, isp
• 문제mismatch, unsupported

raspberrypi/libcamera / src/ipa/libipa/v4l2_stats.cpp / V4L2StatsBase::block / L122-L143

\brief Retrieve an ISP statistics block and return a reference to it \param[in] blockType The kernel-defined ISP block identifier, used to identify the block header \param[in] blockSize The ISP statistics block size, for validation Retrieve a span to the statistics block memory location by accessing the cache built at…

• 기술 영역isp, v4l2
• 문제unsupported

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/agc.cpp / Agc::computeHistogramPredivider / L85-L119

looks like dividing into a counter of 65536 would * overflow by 1, this is apparently fine according to the hardwar

• 기술 영역agc, isp
• 문제overflow
• 효과reduc, increas

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/agc.cpp / Agc::process / L343-L395

\brief Process RkISP1 statistics, and run AGC operations \param[in] context The shared IPA context \param[in] frame The frame context sequence number \param[in] frameContext The current frame context \param[in] stats The RKISP1 statistics and ISP results \param[out] metadata Metadata for the frame, to be filled by the…

• 기술 영역agc, ipa, isp, hdr, metering
• 메커니즘sequence number
• 효과guarantee, lower

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / LensShadingCorrection::LensShadingCorrection / L107-L110

\class LensShadingCorrection \brief RkISP1 Lens Shading Correction control Due to the optical characteristics of the lens, the light intensity received by the sensor is not uniform. The Lens Shading Correction algorithm applies multipliers to all pixels to compensate for the lens shading effect. The coefficients are s…

• 기술 영역lens shading
• 메커니즘characteris, compensat

관측 시점 2026-09-18T11:10:50+02:00 · 최초 발견 commit 6ebe4fdbe8

raspberrypi/libcamera / src/ipa/rkisp1/algorithms/lsc.cpp / LensShadingCorrection::prepare / L205-L245

\copydoc libcamera::ipa::Algorithm::prepare

• 기술 영역lens shading, ipa, awb, lsc
• 메커니즘interpolat

관측 시점 2026-09-18T11:10:50+02:00 · 최초 발견 commit 6ebe4fdbe8

raspberrypi/libcamera / src/ipa/rkisp1/params.h / setEnabled / L146-L156

rmat, blocks are enabled in the * top-level header. Delegate to the RkISP1Params class. */ if (params_->format

• 기술 영역v4l2
• 메커니즘delegat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/cam_helper/cam_helper_imx708.cpp / CamHelperImx708::parseAEHist / L293-L347

hist[1]) { LOG(IPARPI, Error) << "Lin/Log histogram mismatch"; return false; } aeHistLinear_ = Histogram(hist,

• 기술 영역hdr
• 문제mismatch

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::IpaBase / L131-L136

Count_(0), lastRunTimestamp_(0), firstStart_(true), flickerState_({ 0, 0s }), cnnEnableInputTensor_(false), awbEnabled_(

• 기술 영역ipa, awb
• 문제flicker

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::init / L142-L198

ler provider frames at a * rate higher than this, we rate-limit the controller Prepare() and * Process() calls to lo

• 기술 영역ipa, kernel driver, pipeline handler, tuning file
• 메커니즘rate limit
• 효과lower

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::start / L299-L394

lastTimeout_ = 0s;

• 기술 영역ipa, agc, hdr, lens position, v4l2, awb, exposure time, analogue gain
• 문제timeout

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::processStats / L528-L580

setCameraTimeoutValue();

• 기술 영역ipa, pipeline handler, framerate, agc
• 문제timeout

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::setMode / L582-L698

it does, try adjusting the minimum line * length to compensate if possible. */ Duration minPixelTime = controller_

• 기술 영역ipa, pipeline handler, binning, line length, isp
• 문제artifact
• 메커니즘compensat

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::setCameraTimeoutValue / L700-L713

void IpaBase::setCameraTimeoutValue()

• 기술 영역ipa, pipeline handler
• 문제timeout

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.cpp / IpaBase::applyAGC / L1821-L1885

no way of knowing if a control is read-only. * As a workaround, assume that if the minimum and maximum values of *

• 기술 영역ipa, agc, exposure time, fps, vblank, hblank, v4l2, analogue gain
• 문제workaround
• 효과lower

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.h / libcamera / L28-L154

include "cam_helper/cam_helper.h" include "controller/agc_status.h" include "controller/camera_mode.h" include "controller/controller.h" include "controller/hdr_status.h" include "controller/metadata.h"

• 기술 영역agc, hdr, ipa, frame length, isp
• 문제timeout

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.h / ipa / L30-L152

utils::Duration lastTimeout_;

• 기술 영역ipa, frame length, hdr, agc, isp
• 문제timeout

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/common/ipa_base.h / IPARPiInterface / L32-L150

utils::Duration lastTimeout_;

• 기술 영역frame length, hdr, agc, ipa, isp
• 문제timeout

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/ipa/rpi/controller/controller.cpp / std::map<std::string, Controller::HardwareConfig> / L26-L85

d). * * There is a 64kbit data FIFO before the bottleneck, * which means that in all reasonable cases the

• 기술 영역agc, pisp, isp, awb
• 문제bottleneck
• 효과prevent

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::Af / L173-L218

* Reserve space for data structures, to reduce memory fragmentation. * It's too early to query the size of the PDAF sens

• 기술 영역awb
• 문제fragmentation
• 효과reduc

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::earlyTerminationByPhase / L476-L500

is finite and has the expected sign; * Interpolate/extrapolate the lens position for zero phase. * Check that the

• 기술 영역lens position
• 메커니즘interpolat, extrapolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::findPeak / L502-L533

tion by fitting a parabola. * Adapted from awb.cpp: interpolateQaudaratic() */ if (i == 0) i++; else if (i + 1 >= sca

• 기술 영역lens position, awb
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::doAF / L588-L690

f (scanState_ == ScanState::Pdaf) { /* * Use PDAF closed-loop control whenever available, in both CAF * mode and

• 기술 영역sensor mode
• 메커니즘closed loop, fall back to

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::updateLensPosition / L692-L711

nitted_) { /* from a known lens position: apply slew rate limit */ fsmooth_ = std::clamp(ftarget_, fsmooth

• 기술 영역lens position
• 메커니즘rate limit

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.cpp / Af::prepare / L775-L822

PDAF phase data are available in prepare(), but CDAF statistics are not available until process(). We are gambling on the availability of PDAF. To expedite feedback control using PDAF, issue the V4L2 lens control from prepare(). Conversely, during scans, we must allow an extra frame delay between steps, to retrieve CD…

• 기술 영역v4l2, lens position
• 문제frame delay
• 메커니즘feedback control

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.h / initialise / L51-L186

ggering */ double pdafGain; /* coefficient for PDAF feedback loop */ double pdafSquelch; /* PDAF stability parameter

• 기술 영역ipa, metering, lens position
• 메커니즘feedback loop, hysteresis
• 효과lower

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/af.h / CfgParams / L110-L123

s[AfSpeedMax]; uint32_t confEpsilon; /* PDAF hysteresis threshold (sensor-specific) */ uint32_t confThresh;

• 기술 영역ipa
• 메커니즘hysteresis

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/alsc.cpp / Alsc::read / L147-L190

f (ret) return ret; ret = readCalibrations(config_.calibrationsCr, params, "calibrations_Cr", config_.tableSiz

• 기술 영역awb
• 메커니즘calibrat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/alsc.cpp / Alsc::switchMode / L272-L318

code then echoes the code in * doAlsc, without the adaptive algorithm. */ std::fill(lambdaR_.begin(), lambdaR

• 기술 영역awb
• 메커니즘adaptive, calibrat, compensat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_nn.cpp / AwbNN::loadModel / L176-L268

LOG(RPiAwb, Error) << "Model input tensor dimension mismatch. Expected: " << buildDimString(expectedInputDims, 4)

• 기술 영역awb, ipa, tflite, pisp
• 문제mismatch

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_nn.cpp / AwbNN::prepareStats / L284-L300

ied to the stats in this pipeline, so stop * any LSC compensation. We also ignore config_.fast in this version. */ g

• 기술 영역awb, lsc
• 메커니즘compensat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/controller/rpi/awb_nn.cpp / AwbNN::transverseSearch / L302-L347

rbBest = ipa::Pwl::Point({ r, b }) + transverse * interpolateQuadatric(points[bestPoint - 1], points[bestPoint],

• 기술 영역awb, ipa
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/ipa/rpi/vc4/vc4.cpp / IpaVc4::applyDG / L367-L385

s being * less than 1, which would cause saturation artifacts. Note that one of the colour * channels is still ge

• 기술 영역ipa, digital gain, v4l2, awb
• 문제artifact
• 효과increas

raspberrypi/libcamera / src/libcamera/control_serializer.cpp / ControlSerializer::serialize / L322-L388

\brief Serialize a ControlList in a buffer \param[in] list The control list to serialize \param[in] buffer The memory buffer where to serialize the ControlList Serialize the \a list into the \a buffer using the serialization format defined by the IPA context interface in ipa_controls.h. \return 0 on success, a negativ…

• 기술 영역ipa, v4l2, hdr
• 문제overflow

raspberrypi/libcamera / src/libcamera/control_serializer.cpp / ControlSerializer::deserialize<ControlInfoMap> / L422-L555

r.carveOut(hdr->size - hdr->data_offset); if (buffer.overflow()) { LOG(Serializer, Error) << "Out of data"; retu

• 기술 영역ipa, hdr, v4l2
• 문제unsupported, overflow

raspberrypi/libcamera / src/libcamera/control_serializer.cpp / ControlSerializer::deserialize<ControlList> / L567-L662

r.carveOut(hdr->size - hdr->data_offset); if (buffer.overflow()) { LOG(Serializer, Error) << "Out of data"; retu

• 기술 영역ipa, hdr, v4l2
• 문제unsupported, overflow, mismatch

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/converter/converter_dw100_vertexmap.cpp / Dw100VertexMap::getVertexMap / L503-L627

\brief Get the dw100 vertex map Calculates the vertex map as a vector of hardware specific entries. \return The vertex map

• 기술 영역sensor crop, isp
• 메커니즘interpolat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/egl.cpp / eGL::createDMABufTexture2D / L174-L239

\brief Create a DMA-BUF backed 2D texture \param[in,out] eglImage EGL image to associate with the DMA-BUF \param[in] fd DMA-BUF file descriptor \param[in] output If true, create framebuffer for render target Internal implementation for creating DMA-BUF textures. Creates an EGL image from the DMA-BUF and binds it to a …

• 기술 영역dma buf, dmabuf
• 문제artifact
• 효과avoid
• 사소한 변경clang-format, clang format

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/ipa_data_serializer.cpp / IPADataSerializer<ControlList>::serialize / L311-L356

ize(*data.infoMap(), buffer); if (ret < 0 || buffer.overflow()) { LOG(IPADataSerializer, Error) << "Failed to se

• 기술 영역ipa
• 문제fragile, overflow

raspberrypi/libcamera / src/libcamera/ipa_data_serializer.cpp / IPADataSerializer<ControlList>::deserialize / L359-L398

ffer); /* It's fine if map is empty. */ if (buffer.overflow()) { LOG(IPADataSerializer, Error) << "Failed t

• 기술 영역ipa
• 문제overflow

raspberrypi/libcamera / src/libcamera/ipa_data_serializer.cpp / IPADataSerializer<ControlInfoMap>::serialize / L435-L458

= cs->serialize(map, buffer); if (ret < 0 || buffer.overflow()) { LOG(IPADataSerializer, Error) << "Failed to ser

• 기술 영역ipa
• 문제overflow

raspberrypi/libcamera / src/libcamera/ipa_module.cpp / IPAModule::loadIPAModuleInfo / L268-L331

) { LOG(IPAModule, Error) << "IPA module API version mismatch"; return -EINVAL; } /* * Validate the IPA modul

• 기술 영역ipa
• 문제mismatch
• 효과avoid

raspberrypi/libcamera / src/libcamera/pipeline/imx8-isi/imx8-isi.cpp / ISICameraConfiguration::validate / L494-L607

* prefer operating the sensor at full resolution to prioritize * image quality in exchange of a usually slower fram

• 기술 영역camera configuration, image quality, frame rate, sensor configuration
• 메커니즘prioritiz

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/ipu3/ipu3.cpp / PipelineHandlerIPU3::configure / L480-L634

able links * would be 'stop()', but the Camera class state machine allows * start()<->stop() sequences without any conf

• 기술 영역pipeline handler, camera configuration, ipa
• 문제fixme
• 메커니즘state machine

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/ipu3/ipu3.cpp / PipelineHandlerIPU3::allocateBuffers / L660-L701

\todo Clarify if 'viewfinder' and 'stat' nodes have to be set up and started even if not in use. As of now, if not properly configured and enabled, the ImgU processing pipeline stalls. In order to be able to start the 'viewfinder' and 'stat' nodes, we need memory to be reserved.

• 기술 영역pipeline handler, processing pipeline, ipa, stream configuration
• 문제stall

raspberrypi/libcamera / src/libcamera/pipeline/ipu3/ipu3.cpp / IPU3CameraData::loadIPA / L1151-L1199

m the sensor name. If the tuning file * isn't found, fall back to the 'uncalibrated' file. */ std::string ipaTuningFi

• 기술 영역ipa, sensor mode, tuning file
• 메커니즘fall back to

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/ipu3/ipu3.cpp / IPU3CameraData::frameStart / L1385-L1415

\brief Handle the start of frame exposure signal \param[in] sequence The sequence number of frame Inspect the list of pending requests waiting for a RAW frame to be produced and apply controls for the 'next' one. Some controls need to be applied immediately, such as the TestPatternMode one. Other controls are handled …

• 기술 영역start of frame, synchroniz
• 메커니즘sequence number

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/mali-c55/mali-c55.cpp / PipelineHandlerMaliC55::prepareFrameInfo / L1513-L1536

ers_.empty()) { LOG(MaliC55, Error) << "Stats buffer underrun"; return nullptr; } if (availableParamsBuffers_.e

• 기술 영역pipeline handler
• 문제underrun

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/mali-c55/mali-c55.cpp / PipelineHandlerMaliC55::registerTPGCamera / L1793-L1813

The only camera we support through direct connection to the ISP is the Mali-C55 TPG. Check we have that and warn if not.

• 기술 영역pipeline handler, isp
• 문제unsupported

raspberrypi/libcamera / src/libcamera/pipeline/mali-c55/mali-c55.cpp / PipelineHandlerMaliC55::registerMemoryInputCamera / L1864-L1925

me != "rzv2h ivc block") { LOG(MaliC55, Warning) << "Unsupported direct connection to " << link->source()->en

• 기술 영역pipeline handler, v4l2, analogue gain, isp
• 문제unsupported

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline/rkisp1/rkisp1_path.cpp / RkISP1Path::populateFormats / L89-L129

.count(pixelFormat)) { LOG(RkISP1, Warning) << "Unsupported pixel format " << pixelFormat; continue; } str

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.cpp / RPiCameraConfiguration::validate / L164-L308

Invalid sensor configuration: " << "bitDepth/size mismatch"; return Invalid; } } /* Start with some initi

• 기술 영역camera configuration, sensor configuration, bayer, pipeline handler
• 문제mismatch
• 효과save

관측 시점 2026-09-23T22:30:42+05:30 · 최초 발견 commit d48b72e710

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.cpp / PipelineHandlerBase::start / L656-L725

data->wallClockRecovery_.addSample();

• 기술 영역pipeline handler, ipa, sof
• 메커니즘clock recovery

관측 시점 2026-09-23T22:30:42+05:30 · 최초 발견 commit d48b72e710

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.cpp / CameraData::loadPipelineConfiguration / L1120-L1172

ag"; config_.cameraTimeoutValue = phConfig["camera_timeout_value_ms"].get<unsigned int>(config_.cameraTimeoutValu

• 기술 영역pipeline handler
• 문제timeout

관측 시점 2026-09-23T22:30:42+05:30 · 최초 발견 commit d48b72e710

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.cpp / CameraData::handleControlLists / L1561-L1598

List &paramControls) { /* * The delayContext is the sequence number after it's gone through the various * pipeline delay

• 기술 영역isp, synchronis, request queue
• 메커니즘sequence number

관측 시점 2026-09-23T22:30:42+05:30 · 최초 발견 commit d48b72e710

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.h / libcamera / L39-L310

void cameraTimeout();

• 기술 영역ipa, camera configuration, pipeline handler, isp
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.h / RPi / L41-L308

void cameraTimeout();

• 기술 영역ipa, camera configuration, pipeline handler, isp
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.h / CameraData / L47-L200

void cameraTimeout();

• 기술 영역ipa, pipeline handler, camera configuration, isp
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/common/pipeline_base.h / Config / L166-L177

* Override the camera timeout value calculated by the IPA based

• 기술 영역ipa
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/pisp/pisp.cpp / PiSPCameraData / L717-L850

void setCameraTimeout(uint32_t maxFrameLengthMs);

• 기술 영역isp, ipa, latency, 3a, denoise, hdr, pipeline handler, pisp
• 문제timeout
• 효과minimis, increas

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/rpi/pisp/pisp.cpp / PipelineHandlerPiSP::match / L878-L964

) || !variant.NumBackEnds()) { LOG(RPI, Error) << "Unsupported PiSP variant"; break; } std::unique_ptr<RPi

• 기술 영역pipeline handler, media controller, isp, pisp, media device
• 문제unsupported

raspberrypi/libcamera / src/libcamera/pipeline/rpi/pisp/pisp.cpp / PiSPCameraData::cfeBufferDequeue / L1705-L1781

wallClockRecovery_.addSample();

• 기술 영역ipa, dmabuf
• 메커니즘clock recovery

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/rpi/pisp/pisp.cpp / PiSPCameraData::setCameraTimeout / L1860-L1872

void PiSPCameraData::setCameraTimeout(uint32_t maxFrameLengthMs)

• 기술 영역frame length, ipa
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / Vc4CameraData / L38-L149

void setCameraTimeout(uint32_t maxFrameLengthMs);

• 기술 영역isp, ipa, v4l2, pipeline handler, camera configuration, frame length, dma buf, bayer
• 문제timeout

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / PipelineHandlerVc4::platformRegister / L348-L450

am_[Unicam::Embedded].dev()) { LOG(RPI, Warning) << "Mismatch between Unicam and CamHelper for embedded data usage!"

• 기술 영역pipeline handler, isp, ipa, media device
• 문제mismatch

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / Vc4CameraData::platformValidate / L452-L538

; /* Default to CSI2 packing if the user request is unsupported. */ if (rawBayer.packing != BayerFormat::Packing::CS

• 기술 영역isp, camera configuration, stream configuration, bayer, pipeline handler
• 문제unsupported
• 효과reduc

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / Vc4CameraData::unicamBufferDequeue / L795-L841

wallClockRecovery_.addSample();

• 기술 영역ipa, bayer
• 메커니즘clock recovery

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / Vc4CameraData::setCameraTimeout / L951-L963

void Vc4CameraData::setCameraTimeout(uint32_t maxFrameLengthMs)

• 기술 영역frame length, ipa
• 문제timeout

raspberrypi/libcamera / src/libcamera/pipeline/rpi/vc4/vc4.cpp / Vc4CameraData::tryRunPipeline / L965-L1015

params.delayContext = bayerFrame.delayContext;

• 기술 영역ipa, bayer, synchronis, request queue, isp
• 문제frame delay

관측 시점 2026-10-09T08:33:59+01:00 · 최초 발견 commit c682979b50

raspberrypi/libcamera / src/libcamera/pipeline/simple/simple.cpp / SimpleCameraData::tryPipeline / L693-L759

Generate a list of supported pipeline configurations for a sensor media bus code and size. First propagate the media bus code and size through the pipeline from the camera sensor to the video node. Then, query the video node for all supported pixel formats compatible with the media bus code. For each pixel format, sto…

• 기술 영역v4l2, isp
• 문제unsupported

raspberrypi/libcamera / src/libcamera/pipeline/vimc/vimc.cpp / PipelineHandlerVimc::generateConfiguration / L203-L250

rmats::BGR888) { LOG(VIMC, Info) << "Skipping unsupported pixel format " << pixelformat.first; continue

• 기술 영역pipeline handler, camera configuration, stream configuration
• 문제unsupported

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/pipeline_handler.cpp / PipelineHandler::stop / L367-L402

\brief Stop capturing from all running streams and cancel pending requests \param[in] camera The camera to stop This function stops capturing and processing requests immediately. All pending requests are cancelled and complete immediately in an error state. \context This function is called from the CameraManager threa…

• 기술 영역pipeline handler, camera manager
• 메커니즘sequence number

관측 시점 2026-08-18T16:05:45+02:00 · 최초 발견 commit ba33a82226

raspberrypi/libcamera / src/libcamera/sensor/camera_sensor_legacy.cpp / CameraSensorLegacy::validateSensorDriver / L328-L482

th differing alter bayer order properties" << " are unsupported. Disabling flipping."; } else { supportHFlips_ = hf

• 기술 영역sensor driver, v4l2, subdev, bayer, ipa
• 문제unsupported

raspberrypi/libcamera / src/libcamera/sensor/camera_sensor_legacy.cpp / CameraSensorLegacy::initProperties / L572-L668

on) { default: LOG(CameraSensor, Warning) << "Unsupported camera location " << v4l2Orientation << ", setting

• 기술 영역subdev, v4l2, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/sensor/camera_sensor_legacy.cpp / CameraSensorLegacy::applyTestPatternMode / L1031-L1057

tPatternModes_.end()) { LOG(CameraSensor, Error) << "Unsupported test pattern mode " << mode; return -EINVAL;

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/sensor/camera_sensor_raw.cpp / CameraSensorRaw::initProperties / L579-L677

on) { default: LOG(CameraSensor, Warning) << "Unsupported camera location " << v4l2Orientation << ", setting

• 기술 영역subdev, v4l2, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/sensor/camera_sensor_raw.cpp / CameraSensorRaw::applyTestPatternMode / L1142-L1168

tPatternModes_.end()) { LOG(CameraSensor, Error) << "Unsupported test pattern mode " << mode; return -EINVAL;

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / DebayerCpu::getInputConfig / L432-L476

Setup the Debayer object according to the passed in parameters. Return 0 on success, a negative errno value on failure (unsupported parameters).

• 기술 영역debayer, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / DebayerCpu::setDebayerFunctions / L512-L623

o invalidFmt = []() -> int { LOG(Debayer, Error) << "Unsupported input output format combination"; return -EINVAL; }

• 기술 영역debayer, bayer, ccm
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / DebayerCpu::configure / L625-L711

tatsPatternSize.height) { LOG(Debayer, Error) << "mismatching stats and debayer pattern sizes for " << inputCfg.p

• 기술 영역debayer, stream configuration, ccm
• 문제unsupported, mismatch

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / DebayerCpu::patternSize / L742-L750

Get width and height at which the bayer-pattern repeats. Return pattern-size or an empty Size for an unsupported inputFormat.

• 기술 영역debayer, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / DebayerCpu::sizes / L1124-L1151

.height == 2) borderHeight = 0; /* * For debayer interpolation a border is kept around the entire image * and the m

• 기술 영역debayer
• 메커니즘interpolat

관측 시점 2026-09-26T14:56:46+02:00 · 최초 발견 commit 4f21700fb0

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / DebayerEGL::getInputConfig / L54-L98

<< "Unsupported input format " << inputFormat;

• 기술 영역debayer, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / DebayerEGL::initBayerShaders / L133-L272

P_BLUE"); break; default: LOG(Debayer, Error) << "Unsupported output format"; return -EINVAL; } /* Pixel locati

• 기술 영역debayer, bayer
• 문제unsupported

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / DebayerEGL::configure / L274-L342

ts_pattern_size.height) { LOG(Debayer, Error) << "mismatching stats and debayer pattern sizes for " << inputCfg.p

• 기술 영역debayer, stream configuration, ccm
• 문제unsupported, mismatch
• 효과speedup

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / DebayerEGL::getCachedInputFrameBuffer / L496-L546

mode fail create/update an existing texture using the slow path */ inDmaSyncer->emplace(input->planes()[0].fd, DmaSyn

• 기술 영역debayer, dmabuf, mmap, dma buf
• 문제slow path

raspberrypi/libcamera / src/libcamera/software_isp/debayer_egl.cpp / DebayerEGL::sizes / L692-L719

.height == 2) borderHeight = 0; /* * For debayer interpolation a border is kept around the entire image * and the m

• 기술 영역debayer
• 메커니즘interpolat

관측 시점 2026-09-26T14:56:46+02:00 · 최초 발견 commit 4f21700fb0

raspberrypi/libcamera / src/libcamera/software_isp/software_isp.cpp / SoftwareIsp::SoftwareIsp / L81-L181

\brief Constructs SoftwareIsp object \param[in] pipe The pipeline handler in use \param[in] sensor Pointer to the CameraSensor instance owned by the pipeline handler \param[out] ipaControls The IPA controls to update

• 기술 영역isp, pipeline handler, ipa, debayer, tuning file, dma buf, camera manager
• 메커니즘fall back to

관측 시점 2026-09-07T10:40:28Z · 최초 발견 commit 0f0450158f

raspberrypi/libcamera / src/libcamera/v4l2_device.cpp / V4L2Device::getControls / L181-L281

This function reads the value of all controls contained in \a ids, and returns their values as a ControlList. If any control in \a ids is not supported by the device, is disabled (i.e. has the V4L2_CTRL_FLAG_DISABLED flag set), or if any other error occurs during validation of the requested controls, no control is rea…

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/v4l2_device.cpp / V4L2Device::listControls / L706-L762

\brief List and store information about all controls supported by the V4L2 device

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/v4l2_device.cpp / V4L2Device::updateControlInfo / L779-L799

\brief Update the information for all device controls The V4L2Device class caches information about all controls supported by the device and exposes it through the controls() and controlInfo() functions. Control information may change at runtime, for instance when formats on a subdev are modified. When this occurs, th…

• 기술 영역subdev, v4l2
• 문제expensive operation

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::V4L2VideoDevice / L536-L546

\brief Construct a V4L2VideoDevice \param[in] deviceNode The file-system path to the video device node

• 기술 영역mmap, v4l2
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::open / L660-L730

\param[in] handle The file descriptor to set \param[in] type The device type to operate on This function opens a video device from the existing file descriptor \a handle. Like open(), this function queries the capabilities of the device, but handles it according to the given device \a type instead of determining its t…

• 기술 영역v4l2
• 문제unsupported

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::queueBuffer / L1648-L1803

device. For output video devices the \a buffer shall contain valid data and will be processed by the device. Once the device has finished processing the buffer, it will be available for dequeue. The best available V4L2 buffer is picked for \a buffer using the V4L2 buffer cache. Note that queueBuffer() will fail if the…

• 기술 영역v4l2, pipeline handler, dmabuf
• 메커니즘coalesc

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::dequeueBuffer / L1832-L1979

\brief Dequeue the next available buffer from the video device This function dequeues the next available buffer from the device. If no buffer is available to be dequeued it will return nullptr immediately. \return A pointer to the dequeued buffer on success, or nullptr otherwise

• 기술 영역v4l2
• 메커니즘watchdog, sequence number
• 효과prevent

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::streamOn / L1990-L2008

\brief Start the video stream \return 0 on success or a negative error code otherwise

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::streamOff / L2023-L2056

\brief Stop the video stream Buffers that are still queued when the video stream is stopped are immediately dequeued with their status set to FrameMetadata::FrameCancelled, and the bufferReady signal is emitted for them. The order in which those buffers are dequeued is not specified. This will be a no-op if the stream…

• 기술 영역v4l2
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/libcamera/v4l2_videodevice.cpp / V4L2VideoDevice::watchdogExpired / L2094-L2100

\brief Slot to handle an expired dequeue timer When this slot is called, the time between successive dequeue events is over the required timeout. Emit the \ref V4L2VideoDevice::dequeueTimeout signal.

• 기술 영역v4l2
• 문제timeout
• 메커니즘watchdog

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/v4l2/v4l2_camera_proxy.cpp / V4L2CameraProxy::tryFormat / L344-L372

(ret < 0) { LOG(V4L2Compat, Error) << "Failed to negotiate a valid format: " << format; return -EINVAL; }

• 기술 영역v4l2, stream configuration
• 메커니즘negotiat

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / src/v4l2/v4l2_camera_proxy.cpp / V4L2CameraProxy::ioctl / L857-L959

r the ioctl request, which would sign-extend to * an incorrect value for unsigned longs on 64 bit architectures by

• 기술 영역v4l2
• 문제incorrect
• 효과prevent

관측 시점 2026-03-23T10:28:22+01:00 · 최초 발견 commit 957f0f4bd0

raspberrypi/libcamera / include/libcamera/ipa/core.mojom / 6ebe4fdbe8

libcamera: ipa: core: Use native coordinates for IPACameraSensorInfo::analogCrop Now that the camera properties use the physical pixel array as reference coordinate system, do the same with IPACameraSensorInfo::analogCrop. Replace IPACameraSensorInfo::activeAreaSize with IPACameraSensorInfo::activeArea to be able to k…

• 기술 영역ipa, processing pipeline, binning, isp, lsc
• 문제artifact

관측 시점 2026-09-18T11:10:50+02:00

raspberrypi/libcamera / src/android/camera_capabilities.cpp / fd88c9fa80

libcamera: Clarify meaning of PixelArraySize and other rectangles Current documented behavior for PixelArraySize is to report the readable array size of the sensor data. If the readable array is offset relative to the physical sensor array, all related rectangles (ScalerCrop, PixelArrayActiveAreas) shall be reported r…

• 기술 영역ipa, lens shading, sensor driver, lsc, v4l2
• 문제inconsistent
• 사소한 변경rename

관측 시점 2026-09-18T11:10:49+02:00

raspberrypi/libcamera / src/libcamera/property_ids_core.yaml / 61b60d215b

libcamera: property_ids_core: Drop PixelArrayOpticalBlackRectangles The PixelArrayOpticalBlackRectangles is neither used nor populated anywhere in libcamera. The definition of it is difficult (due to the handing of invalid pixels and sensors specifying different OB areas for different binning modes) and will therefore break on the first real world use-case. Drop it for now. This can be revisited …

• 기술 영역binning
• 메커니즘calibrat
• 사소한 변경rename
• 제거된 이전 방식calibrat

관측 시점 2026-09-18T11:10:48+02:00

raspberrypi/libcamera / src/libcamera/software_isp/debayer_cpu.cpp / 4f21700fb0

debayer: Further demote 'Unsupported input format' log On some platforms such as the PinePhone these logs clutter the output of tools and the journal a lot. Let's silence them for normal usage. Also add error logs for the cases where hitting the path would actually be errors. Signed-off-by: Robert Mader <robert.mader@…

• 기술 영역debayer
• 문제unsupported

관측 시점 2026-09-26T14:56:46+02:00

raspberrypi/libcamera / src/ipa/ipu3/data/uncalibrated.yaml / 466a55f99b

ipa: ipu3: Add Ccm to uncalibrated.yaml Add the Ccm algorithm to uncalibrated.yaml. Even without calibrated values we should still expose the controls to the application. Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Daniel Scally <d…

• 기술 영역ipa, ccm
• 메커니즘calibrat

관측 시점 2026-09-14T15:53:48+01:00

raspberrypi/libcamera / src/ipa/libipa/gamma.cpp / f7edcd93db

ipa: libipa: Add GammaAlgorithm class Add a base GammaAlgorithm class that can be used by IPA specific gamma algorithms to reduce the amount of work that they need to implement. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Daniel…

• 기술 영역ipa, gamma curve
• 메커니즘correction curve
• 효과reduc