PawletOS/external_libcamera
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pipeline: raspberrypi: Increase the V4L2BufferCache slot allocations

Browse Source 
If a stream is marked as external, double the number of V4L2BufferCache slots
that are allocated. This is to account for additional buffers that may be
allocated directly by the application.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Naushir Patuck
2021-11-18 16:42:15 +00:00
committed by Kieran Bingham
parent a3b0aa5511
commit 9c246b77e4
1 changed files with 11 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/libcamera/pipeline/raspberrypi/rpi_stream.cpp
View File

@@ -107,6 +107,17 @@ int Stream::prepareBuffers(unsigned int count)
count = bufferMap_.size();
}
/*
* If this is an external stream, we must allocate slots for buffers that
* might be externally allocated. We have no indication of how many buffers
* may be used, so this might overallocate slots in the buffer cache.
*
* \todo Find a better heuristic, or, even better, an exact solution to
* this issue.
*/
if (isExternal())
count = count * 2;
return dev_->importBuffers(count);
}