pipeline: rpi: Add RequiresMmap flag to RPi::Stream

Add a new RequiresMmap flag to the RPi::Stream class indicating that
buffers handled by the stream must be mmapped after allocation and
cached internally.

Add a new member function getBuffer(id) which can be used to obtain the
mapped buffers for a given buffer id.

Add a new member function acquireBuffer() which can be used to obtain
any mapped buffer that has not already been acquired by the caller.

As a drive-by, add the <algorithm> header to rpi_stream.cpp as it is
needed for the std::find_if() function.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libcamera/pipeline/rpi/common/pipeline_base.cpp b/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
index fad710a6..825eae80 100644
--- a/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
+++ b/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
@@ -888,7 +888,7 @@ void PipelineHandlerBase::mapBuffers(Camera *camera, const BufferMap &buffers, u
 	 */
 	for (auto const &it : buffers) {
 		bufferIds.push_back(IPABuffer(mask | it.first,
-					      it.second->planes()));
+					      it.second.buffer->planes()));
 		data->bufferIds_.insert(mask | it.first);
 	}