NekoCWD/libcamera
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libcamera: camera: Pass the stream set to allocate/freeBuffers()

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Pipeline handlers might need to perform allocation of internal buffers,
setup operations, or simple sanity check before going into the
per-stream buffer allocation.

As of now, PipelineHandler::allocateBuffers() is called once for each
active stream, leaving no space for stream-independent configuration.

Change this by providing to the pipeline handlers the full set of active
streams, and ask them to loop over them to perform per-streams
memory allocations and freeing.

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Jacopo Mondi 2019-03-26 17:25:15 +01:00
parent 4e1dc9004f
commit 911bc4aa41
6 changed files with 43 additions and 28 deletions
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7
src/libcamera/camera.cpp
View file

@ -647,14 +647,12 @@ int Camera::allocateBuffers()
return -EINVAL;
}
for (Stream *stream : activeStreams_) {
int ret = pipe_->allocateBuffers(this, stream);
int ret = pipe_->allocateBuffers(this, activeStreams_);
if (ret) {
LOG(Camera, Error) << "Failed to allocate buffers";
freeBuffers();
return ret;
}
}
state_ = CameraPrepared;
@ -683,12 +681,11 @@ int Camera::freeBuffers()
* by the V4L2 device that has allocated them.
*/
stream->bufferPool().destroyBuffers();
pipe_->freeBuffers(this, stream);
}
state_ = CameraConfigured;
return 0;
return pipe_->freeBuffers(this, activeStreams_);
}
/**

6
src/libcamera/include/pipeline_handler.h
View file

@ -58,8 +58,10 @@ public:
streamConfiguration(Camera *camera, const std::vector<StreamUsage> &usages) = 0;
virtual int configureStreams(Camera *camera, const CameraConfiguration &config) = 0;
virtual int allocateBuffers(Camera *camera, Stream *stream) = 0;
virtual int freeBuffers(Camera *camera, Stream *stream) = 0;
virtual int allocateBuffers(Camera *camera,
const std::set<Stream *> &streams) = 0;
virtual int freeBuffers(Camera *camera,
const std::set<Stream *> &streams) = 0;
virtual int start(Camera *camera) = 0;
virtual void stop(Camera *camera);

13
src/libcamera/pipeline/ipu3/ipu3.cpp
View file

@ -145,8 +145,10 @@ public:
int configureStreams(Camera *camera,
const CameraConfiguration &config) override;
int allocateBuffers(Camera *camera, Stream *stream) override;
int freeBuffers(Camera *camera, Stream *stream) override;
int allocateBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int freeBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int start(Camera *camera) override;
void stop(Camera *camera) override;
@ -305,9 +307,11 @@ int PipelineHandlerIPU3::configureStreams(Camera *camera,
return 0;
}
int PipelineHandlerIPU3::allocateBuffers(Camera *camera, Stream *stream)
int PipelineHandlerIPU3::allocateBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
IPU3CameraData *data = cameraData(camera);
Stream *stream = *streams.begin();
CIO2Device *cio2 = &data->cio2_;
ImgUDevice *imgu = data->imgu_;
int ret;
@ -346,7 +350,8 @@ int PipelineHandlerIPU3::allocateBuffers(Camera *camera, Stream *stream)
return 0;
}
int PipelineHandlerIPU3::freeBuffers(Camera *camera, Stream *stream)
int PipelineHandlerIPU3::freeBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
IPU3CameraData *data = cameraData(camera);

13
src/libcamera/pipeline/uvcvideo.cpp
View file

@ -32,8 +32,10 @@ public:
int configureStreams(Camera *camera,
const CameraConfiguration &config) override;
int allocateBuffers(Camera *camera, Stream *stream) override;
int freeBuffers(Camera *camera, Stream *stream) override;
int allocateBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int freeBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int start(Camera *camera) override;
void stop(Camera *camera) override;
@ -127,9 +129,11 @@ int PipelineHandlerUVC::configureStreams(Camera *camera,
return 0;
}
int PipelineHandlerUVC::allocateBuffers(Camera *camera, Stream *stream)
int PipelineHandlerUVC::allocateBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
UVCCameraData *data = cameraData(camera);
Stream *stream = *streams.begin();
const StreamConfiguration &cfg = stream->configuration();
LOG(UVC, Debug) << "Requesting " << cfg.bufferCount << " buffers";
@ -137,7 +141,8 @@ int PipelineHandlerUVC::allocateBuffers(Camera *camera, Stream *stream)
return data->video_->exportBuffers(&stream->bufferPool());
}
int PipelineHandlerUVC::freeBuffers(Camera *camera, Stream *stream)
int PipelineHandlerUVC::freeBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
UVCCameraData *data = cameraData(camera);
return data->video_->releaseBuffers();

13
src/libcamera/pipeline/vimc.cpp
View file

@ -32,8 +32,10 @@ public:
int configureStreams(Camera *camera,
const CameraConfiguration &config) override;
int allocateBuffers(Camera *camera, Stream *stream) override;
int freeBuffers(Camera *camera, Stream *stream) override;
int allocateBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int freeBuffers(Camera *camera,
const std::set<Stream *> &streams) override;
int start(Camera *camera) override;
void stop(Camera *camera) override;
@ -127,9 +129,11 @@ int PipelineHandlerVimc::configureStreams(Camera *camera,
return 0;
}
int PipelineHandlerVimc::allocateBuffers(Camera *camera, Stream *stream)
int PipelineHandlerVimc::allocateBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
VimcCameraData *data = cameraData(camera);
Stream *stream = *streams.begin();
const StreamConfiguration &cfg = stream->configuration();
LOG(VIMC, Debug) << "Requesting " << cfg.bufferCount << " buffers";
@ -137,7 +141,8 @@ int PipelineHandlerVimc::allocateBuffers(Camera *camera, Stream *stream)
return data->video_->exportBuffers(&stream->bufferPool());
}
int PipelineHandlerVimc::freeBuffers(Camera *camera, Stream *stream)
int PipelineHandlerVimc::freeBuffers(Camera *camera,
const std::set<Stream *> &streams)
{
VimcCameraData *data = cameraData(camera);
return data->video_->releaseBuffers();

11
src/libcamera/pipeline_handler.cpp
View file

@ -193,10 +193,11 @@ PipelineHandler::~PipelineHandler()
* \fn PipelineHandler::allocateBuffers()
* \brief Allocate buffers for a stream
* \param[in] camera The camera the \a stream belongs to
* \param[in] stream The stream to allocate buffers for
* \param[in] streams The set of streams to allocate buffers for
*
* This method allocates buffers internally in the pipeline handler and
* associates them with the stream's buffer pool.
* This method allocates buffers internally in the pipeline handler for each
* stream in the \a streams buffer set, and associates them with the stream's
* buffer pool.
*
* The intended caller of this method is the Camera class.
*
@ -207,9 +208,9 @@ PipelineHandler::~PipelineHandler()
* \fn PipelineHandler::freeBuffers()
* \brief Free all buffers associated with a stream
* \param[in] camera The camera the \a stream belongs to
* \param[in] stream The stream to free buffers from
* \param[in] streams The set of streams to free buffers from
*
* After a capture session has been stopped all buffers associated with the
* After a capture session has been stopped all buffers associated with each
* stream shall be freed.
*
* The intended caller of this method is the Camera class.