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v4l2: free kernel buffers before allocating new ones

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See https://bugzilla.gnome.org/show_bug.cgi?id=670257
This commit is contained in:
Wim Taymans 2012-06-26 12:07:47 +02:00
parent 9fd4af2164
commit 1b09bc609a
1 changed files with 11 additions and 0 deletions
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11
sys/v4l2/gstv4l2bufferpool.c
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@ -305,6 +305,17 @@ gst_v4l2_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
else
num_buffers = max_buffers;
/* Free the buffers from the kernel */
GST_DEBUG_OBJECT (pool, "Freeing the buffers from the kernel");
memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
breq.type = obj->type;
breq.count = 0;
breq.memory = V4L2_MEMORY_MMAP;
if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0)
goto reqbufs_failed;
/* first, lets request buffers, and see how many we can get: */
GST_DEBUG_OBJECT (pool, "starting, requesting %d MMAP buffers",
num_buffers);