[libcamera-devel] [PATCH v7 10/11] libcamera: stream: Remove bufferCount
David Plowman
david.plowman at raspberrypi.com
Fri Jul 23 10:42:56 CEST 2021
Hi Nicolas
Thanks very much for all this work! I was wondering if I could ask a
little more about this patch. In our applications, for example, we set
the bufferCount according to the use-case that the application is
implementing. For example:
* For preview windows we set bufferCount to 4.
* For video capture we drop fewer frames with a deeper queue so we set it to 6.
* For stills capture we can get by with one frame, though use cases
that capture several stills images for fusion work better if we set
bufferCount to 2 or 3.
I was wondering how our applications can achieve this behaviour if the
bufferCount field is no longer available.
Thanks!
David
On Fri, 23 Jul 2021 at 00:29, Nícolas F. R. A. Prado
<nfraprado at collabora.com> wrote:
>
> Now that the number of buffers allocated by the FrameBufferAllocator
> helper is passed through FrameBufferAllocator::allocate() and the
> pipelines no longer use bufferCount for internal buffer or V4L2 buffer
> slots allocation, we no longer need to have bufferCount in the
> StreamConfiguration, so remove it.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> ---
>
> No changes in v7
>
> Changes in v6:
> - Removed IPU3_BUFFER_COUNT as it was unused
>
> include/libcamera/stream.h | 2 --
> src/android/camera_stream.cpp | 2 +-
> src/libcamera/pipeline/ipu3/cio2.cpp | 1 -
> src/libcamera/pipeline/ipu3/ipu3.cpp | 8 --------
> src/libcamera/pipeline/raspberrypi/raspberrypi.cpp | 6 ------
> src/libcamera/pipeline/rkisp1/rkisp1_path.cpp | 2 --
> src/libcamera/pipeline/simple/converter.cpp | 3 ---
> src/libcamera/pipeline/simple/converter.h | 3 ---
> src/libcamera/pipeline/simple/simple.cpp | 5 +----
> src/libcamera/pipeline/uvcvideo/uvcvideo.cpp | 3 ---
> src/libcamera/pipeline/vimc/vimc.cpp | 3 ---
> src/libcamera/stream.cpp | 9 ++-------
> src/v4l2/v4l2_camera.cpp | 14 ++++++++++----
> src/v4l2/v4l2_camera.h | 5 +++--
> src/v4l2/v4l2_camera_proxy.cpp | 8 +++-----
> test/camera/buffer_import.cpp | 10 +++++++---
> test/libtest/buffer_source.cpp | 4 ++--
> test/libtest/buffer_source.h | 2 +-
> test/v4l2_videodevice/buffer_cache.cpp | 4 ++--
> 19 files changed, 32 insertions(+), 62 deletions(-)
>
> diff --git a/include/libcamera/stream.h b/include/libcamera/stream.h
> index 0c55e7164592..b25f0059f2f1 100644
> --- a/include/libcamera/stream.h
> +++ b/include/libcamera/stream.h
> @@ -45,8 +45,6 @@ struct StreamConfiguration {
> unsigned int stride;
> unsigned int frameSize;
>
> - unsigned int bufferCount;
> -
> Stream *stream() const { return stream_; }
> void setStream(Stream *stream) { stream_ = stream; }
> const StreamFormats &formats() const { return formats_; }
> diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp
> index b168e3c0c288..0794be409f82 100644
> --- a/src/android/camera_stream.cpp
> +++ b/src/android/camera_stream.cpp
> @@ -94,7 +94,7 @@ int CameraStream::configure()
> buffers_.push_back(frameBuffer.get());
> }
>
> - camera3Stream_->max_buffers = configuration().bufferCount;
> + camera3Stream_->max_buffers = bufferCount;
>
> return 0;
> }
> diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp
> index 1bcd580e251c..0e04e7214489 100644
> --- a/src/libcamera/pipeline/ipu3/cio2.cpp
> +++ b/src/libcamera/pipeline/ipu3/cio2.cpp
> @@ -214,7 +214,6 @@ StreamConfiguration CIO2Device::generateConfiguration(Size size) const
>
> cfg.size = sensorFormat.size;
> cfg.pixelFormat = mbusCodesToPixelFormat.at(sensorFormat.mbus_code);
> - cfg.bufferCount = CIO2_BUFFER_COUNT;
>
> return cfg;
> }
> diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
> index 4efd201c05e5..b223b3f33cd0 100644
> --- a/src/libcamera/pipeline/ipu3/ipu3.cpp
> +++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
> @@ -38,7 +38,6 @@ namespace libcamera {
>
> LOG_DEFINE_CATEGORY(IPU3)
>
> -static constexpr unsigned int IPU3_BUFFER_COUNT = 4;
> static constexpr unsigned int IPU3_MAX_STREAMS = 3;
> static const Size IMGU_OUTPUT_MIN_SIZE = { 2, 2 };
> static const Size IMGU_OUTPUT_MAX_SIZE = { 4480, 34004 };
> @@ -295,7 +294,6 @@ CameraConfiguration::Status IPU3CameraConfiguration::validate()
> /* Initialize the RAW stream with the CIO2 configuration. */
> cfg->size = cio2Configuration_.size;
> cfg->pixelFormat = cio2Configuration_.pixelFormat;
> - cfg->bufferCount = cio2Configuration_.bufferCount;
> cfg->stride = info.stride(cfg->size.width, 0, 64);
> cfg->frameSize = info.frameSize(cfg->size, 64);
> cfg->setStream(const_cast<Stream *>(&data_->rawStream_));
> @@ -339,7 +337,6 @@ CameraConfiguration::Status IPU3CameraConfiguration::validate()
> IMGU_OUTPUT_HEIGHT_ALIGN);
>
> cfg->pixelFormat = formats::NV12;
> - cfg->bufferCount = IPU3_BUFFER_COUNT;
> cfg->stride = info.stride(cfg->size.width, 0, 1);
> cfg->frameSize = info.frameSize(cfg->size, 1);
>
> @@ -407,7 +404,6 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
> Size sensorResolution = data->cio2_.sensor()->resolution();
> for (const StreamRole role : roles) {
> std::map<PixelFormat, std::vector<SizeRange>> streamFormats;
> - unsigned int bufferCount;
> PixelFormat pixelFormat;
> Size size;
>
> @@ -428,7 +424,6 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
> size.height = utils::alignDown(size.height - 1,
> IMGU_OUTPUT_HEIGHT_MARGIN);
> pixelFormat = formats::NV12;
> - bufferCount = IPU3_BUFFER_COUNT;
> streamFormats[pixelFormat] = { { IMGU_OUTPUT_MIN_SIZE, size } };
>
> break;
> @@ -438,7 +433,6 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
> data->cio2_.generateConfiguration(sensorResolution);
> pixelFormat = cio2Config.pixelFormat;
> size = cio2Config.size;
> - bufferCount = cio2Config.bufferCount;
>
> for (const PixelFormat &format : data->cio2_.formats())
> streamFormats[format] = data->cio2_.sizes();
> @@ -457,7 +451,6 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
> .alignedDownTo(IMGU_OUTPUT_WIDTH_ALIGN,
> IMGU_OUTPUT_HEIGHT_ALIGN);
> pixelFormat = formats::NV12;
> - bufferCount = IPU3_BUFFER_COUNT;
> streamFormats[pixelFormat] = { { IMGU_OUTPUT_MIN_SIZE, size } };
>
> break;
> @@ -474,7 +467,6 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
> StreamConfiguration cfg(formats);
> cfg.size = size;
> cfg.pixelFormat = pixelFormat;
> - cfg.bufferCount = bufferCount;
> config->addConfiguration(cfg);
> }
>
> diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
> index 776e0f92aed1..e6fc0425c3ef 100644
> --- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
> +++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
> @@ -473,7 +473,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> RPiCameraData *data = cameraData(camera);
> CameraConfiguration *config = new RPiCameraConfiguration(data);
> V4L2DeviceFormat sensorFormat;
> - unsigned int bufferCount;
> PixelFormat pixelFormat;
> V4L2VideoDevice::Formats fmts;
> Size size;
> @@ -491,7 +490,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> sensorFormat = findBestMode(fmts, size);
> pixelFormat = sensorFormat.fourcc.toPixelFormat();
> ASSERT(pixelFormat.isValid());
> - bufferCount = 2;
> rawCount++;
> break;
>
> @@ -500,7 +498,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> pixelFormat = formats::NV12;
> /* Return the largest sensor resolution. */
> size = data->sensor_->resolution();
> - bufferCount = 1;
> outCount++;
> break;
>
> @@ -516,7 +513,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> fmts = data->isp_[Isp::Output0].dev()->formats();
> pixelFormat = formats::YUV420;
> size = { 1920, 1080 };
> - bufferCount = 4;
> outCount++;
> break;
>
> @@ -524,7 +520,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> fmts = data->isp_[Isp::Output0].dev()->formats();
> pixelFormat = formats::ARGB8888;
> size = { 800, 600 };
> - bufferCount = 4;
> outCount++;
> break;
>
> @@ -554,7 +549,6 @@ CameraConfiguration *PipelineHandlerRPi::generateConfiguration(Camera *camera,
> StreamConfiguration cfg(formats);
> cfg.size = size;
> cfg.pixelFormat = pixelFormat;
> - cfg.bufferCount = bufferCount;
> config->addConfiguration(cfg);
> }
>
> diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
> index fea330f72886..4961f3971e59 100644
> --- a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
> +++ b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
> @@ -61,7 +61,6 @@ StreamConfiguration RkISP1Path::generateConfiguration(const Size &resolution)
> StreamConfiguration cfg(formats);
> cfg.pixelFormat = formats::NV12;
> cfg.size = maxResolution;
> - cfg.bufferCount = RKISP1_BUFFER_COUNT;
>
> return cfg;
> }
> @@ -77,7 +76,6 @@ CameraConfiguration::Status RkISP1Path::validate(StreamConfiguration *cfg)
>
> cfg->size.boundTo(maxResolution_);
> cfg->size.expandTo(minResolution_);
> - cfg->bufferCount = RKISP1_BUFFER_COUNT;
>
> V4L2DeviceFormat format;
> format.fourcc = video_->toV4L2PixelFormat(cfg->pixelFormat);
> diff --git a/src/libcamera/pipeline/simple/converter.cpp b/src/libcamera/pipeline/simple/converter.cpp
> index b3bcf01483f7..fda417793e80 100644
> --- a/src/libcamera/pipeline/simple/converter.cpp
> +++ b/src/libcamera/pipeline/simple/converter.cpp
> @@ -89,9 +89,6 @@ int SimpleConverter::Stream::configure(const StreamConfiguration &inputCfg,
> return -EINVAL;
> }
>
> - inputBufferCount_ = inputCfg.bufferCount;
> - outputBufferCount_ = outputCfg.bufferCount;
> -
> return 0;
> }
>
> diff --git a/src/libcamera/pipeline/simple/converter.h b/src/libcamera/pipeline/simple/converter.h
> index 7e1d60674f62..406e63ca2a80 100644
> --- a/src/libcamera/pipeline/simple/converter.h
> +++ b/src/libcamera/pipeline/simple/converter.h
> @@ -87,9 +87,6 @@ private:
> SimpleConverter *converter_;
> unsigned int index_;
> std::unique_ptr<V4L2M2MDevice> m2m_;
> -
> - unsigned int inputBufferCount_;
> - unsigned int outputBufferCount_;
> };
>
> std::string deviceNode_;
> diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp
> index a1163eaf8be2..ded04914f610 100644
> --- a/src/libcamera/pipeline/simple/simple.cpp
> +++ b/src/libcamera/pipeline/simple/simple.cpp
> @@ -628,7 +628,7 @@ CameraConfiguration::Status SimpleCameraConfiguration::validate()
> cfg.size != pipeConfig_->captureSize)
> needConversion_ = true;
>
> - /* Set the stride, frameSize and bufferCount. */
> + /* Set the stride and frameSize. */
> if (needConversion_) {
> std::tie(cfg.stride, cfg.frameSize) =
> converter->strideAndFrameSize(cfg.pixelFormat, cfg.size);
> @@ -646,8 +646,6 @@ CameraConfiguration::Status SimpleCameraConfiguration::validate()
> cfg.stride = format.planes[0].bpl;
> cfg.frameSize = format.planes[0].size;
> }
> -
> - cfg.bufferCount = 3;
> }
>
> return status;
> @@ -770,7 +768,6 @@ int SimplePipelineHandler::configure(Camera *camera, CameraConfiguration *c)
> inputCfg.pixelFormat = pipeConfig->captureFormat;
> inputCfg.size = pipeConfig->captureSize;
> inputCfg.stride = captureFormat.planes[0].bpl;
> - inputCfg.bufferCount = kNumInternalBuffers;
>
> return converter_->configure(inputCfg, outputCfgs);
> }
> diff --git a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
> index 755949e7a59a..32482300f09a 100644
> --- a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
> +++ b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
> @@ -150,8 +150,6 @@ CameraConfiguration::Status UVCCameraConfiguration::validate()
> status = Adjusted;
> }
>
> - cfg.bufferCount = 4;
> -
> V4L2DeviceFormat format;
> format.fourcc = data_->video_->toV4L2PixelFormat(cfg.pixelFormat);
> format.size = cfg.size;
> @@ -193,7 +191,6 @@ CameraConfiguration *PipelineHandlerUVC::generateConfiguration(Camera *camera,
>
> cfg.pixelFormat = formats.pixelformats().front();
> cfg.size = formats.sizes(cfg.pixelFormat).back();
> - cfg.bufferCount = 4;
>
> config->addConfiguration(cfg);
>
> diff --git a/src/libcamera/pipeline/vimc/vimc.cpp b/src/libcamera/pipeline/vimc/vimc.cpp
> index 24ba743a946c..a698427c4361 100644
> --- a/src/libcamera/pipeline/vimc/vimc.cpp
> +++ b/src/libcamera/pipeline/vimc/vimc.cpp
> @@ -167,8 +167,6 @@ CameraConfiguration::Status VimcCameraConfiguration::validate()
> status = Adjusted;
> }
>
> - cfg.bufferCount = 4;
> -
> V4L2DeviceFormat format;
> format.fourcc = data_->video_->toV4L2PixelFormat(cfg.pixelFormat);
> format.size = cfg.size;
> @@ -224,7 +222,6 @@ CameraConfiguration *PipelineHandlerVimc::generateConfiguration(Camera *camera,
>
> cfg.pixelFormat = formats::BGR888;
> cfg.size = { 1920, 1080 };
> - cfg.bufferCount = 4;
>
> config->addConfiguration(cfg);
>
> diff --git a/src/libcamera/stream.cpp b/src/libcamera/stream.cpp
> index b8626775d224..ca507b72b26a 100644
> --- a/src/libcamera/stream.cpp
> +++ b/src/libcamera/stream.cpp
> @@ -280,7 +280,7 @@ SizeRange StreamFormats::range(const PixelFormat &pixelformat) const
> * handlers provide StreamFormats.
> */
> StreamConfiguration::StreamConfiguration()
> - : pixelFormat(0), stride(0), frameSize(0), bufferCount(0),
> + : pixelFormat(0), stride(0), frameSize(0),
> stream_(nullptr)
> {
> }
> @@ -289,7 +289,7 @@ StreamConfiguration::StreamConfiguration()
> * \brief Construct a configuration with stream formats
> */
> StreamConfiguration::StreamConfiguration(const StreamFormats &formats)
> - : pixelFormat(0), stride(0), frameSize(0), bufferCount(0),
> + : pixelFormat(0), stride(0), frameSize(0),
> stream_(nullptr), formats_(formats)
> {
> }
> @@ -324,11 +324,6 @@ StreamConfiguration::StreamConfiguration(const StreamFormats &formats)
> * validating the configuration with a call to CameraConfiguration::validate().
> */
>
> -/**
> - * \var StreamConfiguration::bufferCount
> - * \brief Requested number of buffers to allocate for the stream
> - */
> -
> /**
> * \fn StreamConfiguration::stream()
> * \brief Retrieve the stream associated with the configuration
> diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp
> index d01eacfa2b84..2ff9affc6388 100644
> --- a/src/v4l2/v4l2_camera.cpp
> +++ b/src/v4l2/v4l2_camera.cpp
> @@ -12,6 +12,8 @@
>
> #include <libcamera/base/log.h>
>
> +#include <libcamera/property_ids.h>
> +
> using namespace libcamera;
>
> LOG_DECLARE_CATEGORY(V4L2Compat)
> @@ -107,14 +109,12 @@ void V4L2Camera::requestComplete(Request *request)
> }
>
> int V4L2Camera::configure(StreamConfiguration *streamConfigOut,
> - const Size &size, const PixelFormat &pixelformat,
> - unsigned int bufferCount)
> + const Size &size, const PixelFormat &pixelformat)
> {
> StreamConfiguration &streamConfig = config_->at(0);
> streamConfig.size.width = size.width;
> streamConfig.size.height = size.height;
> streamConfig.pixelFormat = pixelformat;
> - streamConfig.bufferCount = bufferCount;
> /* \todo memoryType (interval vs external) */
>
> CameraConfiguration::Status validation = config_->validate();
> @@ -146,7 +146,6 @@ int V4L2Camera::validateConfiguration(const PixelFormat &pixelFormat,
> StreamConfiguration &cfg = config->at(0);
> cfg.size = size;
> cfg.pixelFormat = pixelFormat;
> - cfg.bufferCount = 1;
>
> CameraConfiguration::Status validation = config->validate();
> if (validation == CameraConfiguration::Invalid)
> @@ -299,3 +298,10 @@ bool V4L2Camera::isRunning()
> {
> return isRunning_;
> }
> +
> +unsigned int V4L2Camera::minimumRequests(unsigned int count)
> +{
> + unsigned int min = camera_->properties().get(properties::MinimumRequests);
> +
> + return std::max(count, min);
> +}
> diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h
> index a095f4e27524..4b5618ac12b5 100644
> --- a/src/v4l2/v4l2_camera.h
> +++ b/src/v4l2/v4l2_camera.h
> @@ -45,8 +45,7 @@ public:
> std::vector<Buffer> completedBuffers();
>
> int configure(StreamConfiguration *streamConfigOut,
> - const Size &size, const PixelFormat &pixelformat,
> - unsigned int bufferCount);
> + const Size &size, const PixelFormat &pixelformat);
> int validateConfiguration(const PixelFormat &pixelformat,
> const Size &size,
> StreamConfiguration *streamConfigOut);
> @@ -65,6 +64,8 @@ public:
>
> bool isRunning();
>
> + unsigned int minimumRequests(unsigned int count);
> +
> private:
> void requestComplete(Request *request);
>
> diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp
> index 7682c4bddf90..634ec84e0cbb 100644
> --- a/src/v4l2/v4l2_camera_proxy.cpp
> +++ b/src/v4l2/v4l2_camera_proxy.cpp
> @@ -349,8 +349,7 @@ int V4L2CameraProxy::vidioc_s_fmt(V4L2CameraFile *file, struct v4l2_format *arg)
> Size size(arg->fmt.pix.width, arg->fmt.pix.height);
> V4L2PixelFormat v4l2Format = V4L2PixelFormat(arg->fmt.pix.pixelformat);
> ret = vcam_->configure(&streamConfig_, size,
> - PixelFormatInfo::info(v4l2Format).format,
> - bufferCount_);
> + PixelFormatInfo::info(v4l2Format).format);
> if (ret < 0)
> return -EINVAL;
>
> @@ -491,14 +490,13 @@ int V4L2CameraProxy::vidioc_reqbufs(V4L2CameraFile *file, struct v4l2_requestbuf
> Size size(v4l2PixFormat_.width, v4l2PixFormat_.height);
> V4L2PixelFormat v4l2Format = V4L2PixelFormat(v4l2PixFormat_.pixelformat);
> int ret = vcam_->configure(&streamConfig_, size,
> - PixelFormatInfo::info(v4l2Format).format,
> - arg->count);
> + PixelFormatInfo::info(v4l2Format).format);
> if (ret < 0)
> return -EINVAL;
>
> setFmtFromConfig(streamConfig_);
>
> - arg->count = streamConfig_.bufferCount;
> + arg->count = vcam_->minimumRequests(arg->count);
> bufferCount_ = arg->count;
>
> ret = vcam_->allocBuffers(arg->count);
> diff --git a/test/camera/buffer_import.cpp b/test/camera/buffer_import.cpp
> index c504ea09e64b..67ac0ad20e15 100644
> --- a/test/camera/buffer_import.cpp
> +++ b/test/camera/buffer_import.cpp
> @@ -16,6 +16,8 @@
> #include <libcamera/base/thread.h>
> #include <libcamera/base/timer.h>
>
> +#include <libcamera/property_ids.h>
> +
> #include "libcamera/internal/device_enumerator.h"
> #include "libcamera/internal/media_device.h"
> #include "libcamera/internal/v4l2_videodevice.h"
> @@ -92,10 +94,12 @@ protected:
> return TestFail;
> }
>
> + unsigned int bufferCount = camera_->properties().get(properties::MinimumRequests);
> +
> Stream *stream = cfg.stream();
>
> BufferSource source;
> - int ret = source.allocate(cfg);
> + int ret = source.allocate(cfg, bufferCount);
> if (ret != TestPass)
> return ret;
>
> @@ -139,10 +143,10 @@ protected:
> while (timer.isRunning())
> dispatcher->processEvents();
>
> - if (completeRequestsCount_ < cfg.bufferCount * 2) {
> + if (completeRequestsCount_ < bufferCount * 2) {
> std::cout << "Failed to capture enough frames (got "
> << completeRequestsCount_ << " expected at least "
> - << cfg.bufferCount * 2 << ")" << std::endl;
> + << bufferCount * 2 << ")" << std::endl;
> return TestFail;
> }
>
> diff --git a/test/libtest/buffer_source.cpp b/test/libtest/buffer_source.cpp
> index 73563f2fc39d..c3d5286a2462 100644
> --- a/test/libtest/buffer_source.cpp
> +++ b/test/libtest/buffer_source.cpp
> @@ -24,7 +24,7 @@ BufferSource::~BufferSource()
> media_->release();
> }
>
> -int BufferSource::allocate(const StreamConfiguration &config)
> +int BufferSource::allocate(const StreamConfiguration &config, unsigned int count)
> {
> /* Locate and open the video device. */
> std::string videoDeviceName = "vivid-000-vid-out";
> @@ -77,7 +77,7 @@ int BufferSource::allocate(const StreamConfiguration &config)
> return TestFail;
> }
>
> - if (video->allocateBuffers(config.bufferCount, &buffers_) < 0) {
> + if (video->allocateBuffers(count, &buffers_) < 0) {
> std::cout << "Failed to allocate buffers" << std::endl;
> return TestFail;
> }
> diff --git a/test/libtest/buffer_source.h b/test/libtest/buffer_source.h
> index 14b4770e8d8a..6a18e269a575 100644
> --- a/test/libtest/buffer_source.h
> +++ b/test/libtest/buffer_source.h
> @@ -20,7 +20,7 @@ public:
> BufferSource();
> ~BufferSource();
>
> - int allocate(const StreamConfiguration &config);
> + int allocate(const StreamConfiguration &config, unsigned int count);
> const std::vector<std::unique_ptr<FrameBuffer>> &buffers();
>
> private:
> diff --git a/test/v4l2_videodevice/buffer_cache.cpp b/test/v4l2_videodevice/buffer_cache.cpp
> index b3f2bec11783..07fddfd2617c 100644
> --- a/test/v4l2_videodevice/buffer_cache.cpp
> +++ b/test/v4l2_videodevice/buffer_cache.cpp
> @@ -10,6 +10,7 @@
> #include <vector>
>
> #include <libcamera/formats.h>
> +#include <libcamera/property_ids.h>
> #include <libcamera/stream.h>
>
> #include "buffer_source.h"
> @@ -145,10 +146,9 @@ public:
> StreamConfiguration cfg;
> cfg.pixelFormat = formats::YUYV;
> cfg.size = Size(600, 800);
> - cfg.bufferCount = numBuffers;
>
> BufferSource source;
> - int ret = source.allocate(cfg);
> + int ret = source.allocate(cfg, numBuffers);
> if (ret != TestPass)
> return ret;
>
> --
> 2.32.0
>
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