[libcamera-devel] [PATCH v5 02/14] libcamera: camera: Pass the stream set to allocate/freeBuffers()
Jacopo Mondi
jacopo at jmondi.org
Thu Apr 18 12:47:03 CEST 2019
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 at ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
src/libcamera/camera.cpp | 15 ++++++---------
src/libcamera/include/pipeline_handler.h | 6 ++++--
src/libcamera/pipeline/ipu3/ipu3.cpp | 13 +++++++++----
src/libcamera/pipeline/uvcvideo.cpp | 13 +++++++++----
src/libcamera/pipeline/vimc.cpp | 13 +++++++++----
src/libcamera/pipeline_handler.cpp | 11 ++++++-----
6 files changed, 43 insertions(+), 28 deletions(-)
diff --git a/src/libcamera/camera.cpp b/src/libcamera/camera.cpp
index bdf14b31d8ee..21caa24b90b5 100644
--- a/src/libcamera/camera.cpp
+++ b/src/libcamera/camera.cpp
@@ -647,13 +647,11 @@ int Camera::allocateBuffers()
return -EINVAL;
}
- for (Stream *stream : activeStreams_) {
- int ret = pipe_->allocateBuffers(this, stream);
- if (ret) {
- LOG(Camera, Error) << "Failed to allocate buffers";
- freeBuffers();
- return ret;
- }
+ 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_);
}
/**
diff --git a/src/libcamera/include/pipeline_handler.h b/src/libcamera/include/pipeline_handler.h
index 33b820e706cc..a0862ebf35df 100644
--- a/src/libcamera/include/pipeline_handler.h
+++ b/src/libcamera/include/pipeline_handler.h
@@ -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);
diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index ca09da753b90..f96e8763bce9 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -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);
diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
index cd472cfadd86..b8f634d88b46 100644
--- a/src/libcamera/pipeline/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo.cpp
@@ -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();
diff --git a/src/libcamera/pipeline/vimc.cpp b/src/libcamera/pipeline/vimc.cpp
index c8bbe2a19847..22449e47bc2d 100644
--- a/src/libcamera/pipeline/vimc.cpp
+++ b/src/libcamera/pipeline/vimc.cpp
@@ -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();
diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index 43550c0e0210..911d08448e69 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -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.
--
2.21.0
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