diff options
| -rw-r--r-- | src/libcamera/pipeline/rpi/vc4/data/meson.build | 1 | ||||
| -rw-r--r-- | src/libcamera/pipeline/rpi/vc4/data/rpi_apps.yaml | 45 | ||||
| -rw-r--r-- | src/libcamera/pipeline/rpi/vc4/vc4.cpp | 80 |
3 files changed, 112 insertions, 14 deletions
diff --git a/src/libcamera/pipeline/rpi/vc4/data/meson.build b/src/libcamera/pipeline/rpi/vc4/data/meson.build index cca5e388..665ddb98 100644 --- a/src/libcamera/pipeline/rpi/vc4/data/meson.build +++ b/src/libcamera/pipeline/rpi/vc4/data/meson.build @@ -2,6 +2,7 @@ conf_files = files([ 'example.yaml', + 'rpi_apps.yaml', ]) install_data(conf_files, diff --git a/src/libcamera/pipeline/rpi/vc4/data/rpi_apps.yaml b/src/libcamera/pipeline/rpi/vc4/data/rpi_apps.yaml new file mode 100644 index 00000000..f2c849b7 --- /dev/null +++ b/src/libcamera/pipeline/rpi/vc4/data/rpi_apps.yaml @@ -0,0 +1,45 @@ +{ + "version": 1.0, + "target": "bcm2835", + + "pipeline_handler": + { + # The minimum number of internal buffers to be allocated for + # Unicam. This value must be greater than 0, but less than or + # equal to min_total_unicam_buffers. + # + # A larger number of internal buffers can reduce the occurrence + # of frame drops during high CPU loads, but might also cause + # additional latency in the system. + # + # Note that the pipeline handler might override this value and + # not allocate any internal buffers if it knows they will never + # be used. For example if the RAW stream is marked as mandatory + # and there are no dropped frames signalled for algorithm + # convergence. + # + "min_unicam_buffers": 2, + + # The minimum total (internal + external) buffer count used for + # Unicam. The number of internal buffers allocated for Unicam is + # given by: + # + # internal buffer count = max(min_unicam_buffers, + # min_total_unicam_buffers - external buffer count) + # + "min_total_unicam_buffers": 4, + + # Override any request from the IPA to drop a number of startup + # frames. + # + # "disable_startup_frame_drops": false, + + # The application will always provide a request buffer for the + # RAW stream, if it has been configured. + "raw_mandatory_stream": true, + + # The application will always provide a request buffer for the + # Output 0 stream, if it has been configured. + "output0_mandatory_stream": true, + } +} diff --git a/src/libcamera/pipeline/rpi/vc4/vc4.cpp b/src/libcamera/pipeline/rpi/vc4/vc4.cpp index a5cc4fc1..ea0be594 100644 --- a/src/libcamera/pipeline/rpi/vc4/vc4.cpp +++ b/src/libcamera/pipeline/rpi/vc4/vc4.cpp @@ -105,6 +105,16 @@ public: * minTotalUnicamBuffers >= minUnicamBuffers */ unsigned int minTotalUnicamBuffers; + /* + * The application will always provide a request buffer for the + * RAW stream, if it has been configured. + */ + bool rawMandatoryStream; + /* + * The application will always provide a request buffer for the + * Output 0 stream, if it has been configured. + */ + bool output0MandatoryStream; }; Config config_; @@ -219,16 +229,47 @@ bool PipelineHandlerVc4::match(DeviceEnumerator *enumerator) int PipelineHandlerVc4::prepareBuffers(Camera *camera) { Vc4CameraData *data = cameraData(camera); - unsigned int numRawBuffers = 0; + unsigned int minUnicamBuffers = data->config_.minUnicamBuffers; + unsigned int minTotalUnicamBuffers = data->config_.minTotalUnicamBuffers; + unsigned int numRawBuffers = 0, minIspBuffers = 1; int ret; - for (Stream *s : camera->streams()) { - if (BayerFormat::fromPixelFormat(s->configuration().pixelFormat).isValid()) { - numRawBuffers = s->configuration().bufferCount; - break; + if (data->unicam_[Unicam::Image].getFlags() & StreamFlag::External) { + numRawBuffers = data->unicam_[Unicam::Image].getBuffers().size(); + /* + * If the application provides a guarantees that Unicam + * image buffers will always be provided for the RAW stream + * in a Request, we need: + * - at least 1 internal Unicam buffer to handle startup frame drops, + * - no internal Unicam buffers if there are no startup frame drops. + */ + if (data->config_.rawMandatoryStream) { + if (data->dropFrameCount_) { + minUnicamBuffers = 2; + minTotalUnicamBuffers = 2; + } else { + minUnicamBuffers = 0; + minTotalUnicamBuffers = 0; + } } } + if (data->isp_[Isp::Output0].getFlags() & StreamFlag::External) { + /* + * Since the ISP runs synchronous with the IPA and requests, + * we only ever need a maximum of one internal buffer. Any + * buffers the application wants to hold onto will already + * be exported through PipelineHandlerRPi::exportFrameBuffers(). + * + * However, as above, if the application provides a guarantee + * that the buffer will always be provided for the ISP Output0 + * stream in a Request, we don't need any internal buffers + * allocated. + */ + if (!data->dropFrameCount_ && data->config_.output0MandatoryStream) + minIspBuffers = 0; + } + /* Decide how many internal buffers to allocate. */ for (auto const stream : data->streams_) { unsigned int numBuffers; @@ -236,7 +277,6 @@ int PipelineHandlerVc4::prepareBuffers(Camera *camera) * For Unicam, allocate a minimum number of buffers for internal * use as we want to avoid any frame drops. */ - const unsigned int minBuffers = data->config_.minTotalUnicamBuffers; if (stream == &data->unicam_[Unicam::Image]) { /* * If an application has configured a RAW stream, allocate @@ -244,8 +284,9 @@ int PipelineHandlerVc4::prepareBuffers(Camera *camera) * we have at least minUnicamBuffers of internal buffers * to use to minimise frame drops. */ - numBuffers = std::max<int>(data->config_.minUnicamBuffers, - minBuffers - numRawBuffers); + numBuffers = std::max<int>(minUnicamBuffers, + minTotalUnicamBuffers - numRawBuffers); + LOG(RPI, Debug) << "Unicam::Image numBuffers " << numBuffers; } else if (stream == &data->isp_[Isp::Input]) { /* * ISP input buffers are imported from Unicam, so follow @@ -253,8 +294,9 @@ int PipelineHandlerVc4::prepareBuffers(Camera *camera) * available. */ numBuffers = numRawBuffers + - std::max<int>(data->config_.minUnicamBuffers, - minBuffers - numRawBuffers); + std::max<int>(minUnicamBuffers, + minTotalUnicamBuffers - numRawBuffers); + LOG(RPI, Debug) << "Isp::Input numBuffers " << numBuffers; } else if (stream == &data->unicam_[Unicam::Embedded]) { /* @@ -273,14 +315,18 @@ int PipelineHandlerVc4::prepareBuffers(Camera *camera) * buffers, as these will be recycled quicker. */ numBuffers = 12; + } else if (stream == &data->isp_[Isp::Output0]) { + /* Buffer count for this is handled in the earlier loop above. */ + numBuffers = minIspBuffers; + LOG(RPI, Debug) << "Isp::Output0 numBuffers " << numBuffers; } else { /* - * Since the ISP runs synchronous with the IPA and requests, - * we only ever need one set of internal buffers. Any buffers - * the application wants to hold onto will already be exported - * through PipelineHandlerRPi::exportFrameBuffers(). + * Same reasoning as for ISP Output 0, we only ever need + * a maximum of one internal buffer for Output1 (required + * for colour denoise) and ISP statistics. */ numBuffers = 1; + LOG(RPI, Debug) << "Other numBuffers " << numBuffers; } ret = stream->prepareBuffers(numBuffers); @@ -484,6 +530,8 @@ int Vc4CameraData::platformPipelineConfigure(const std::unique_ptr<YamlObject> & config_ = { .minUnicamBuffers = 2, .minTotalUnicamBuffers = 4, + .rawMandatoryStream = false, + .output0MandatoryStream = false, }; if (!root) @@ -507,6 +555,10 @@ int Vc4CameraData::platformPipelineConfigure(const std::unique_ptr<YamlObject> & phConfig["min_unicam_buffers"].get<unsigned int>(config_.minUnicamBuffers); config_.minTotalUnicamBuffers = phConfig["min_total_unicam_buffers"].get<unsigned int>(config_.minTotalUnicamBuffers); + config_.rawMandatoryStream = + phConfig["raw_mandatory_stream"].get<bool>(config_.rawMandatoryStream); + config_.output0MandatoryStream = + phConfig["output0_mandatory_stream"].get<bool>(config_.output0MandatoryStream); if (config_.minTotalUnicamBuffers < config_.minUnicamBuffers) { LOG(RPI, Error) << "Invalid configuration: min_total_unicam_buffers must be >= min_unicam_buffers"; |