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v4l2bufferpool: Fix copy threshold implementation

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We cannot allocate new buffer in acquire, otherwise the base class
is not aware and get confused. Instead, copy in _process(). This leads
to crash on finalize.

Fixes regression, see https://bugzilla.gnome.org/show_bug.cgi?id=732912
This commit is contained in:
Nicolas Dufresne 2014-07-11 13:35:10 -04:00
parent bf96c9c545
commit d7876e5597
1 changed files with 26 additions and 24 deletions
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50
sys/v4l2/gstv4l2bufferpool.c
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@ -1171,27 +1171,6 @@ gst_v4l2_buffer_pool_acquire_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
ret = gst_v4l2_buffer_pool_dqbuf (pool, buffer);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto done;
/* start copying buffers when we are running low on buffers */
if (g_atomic_int_get (&pool->num_queued) < pool->copy_threshold) {
GstBuffer *copy;
if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP)) {
if (pclass->acquire_buffer (bpool, &copy, params) == GST_FLOW_OK) {
gst_v4l2_buffer_pool_release_buffer (bpool, copy);
break;
}
}
/* copy the buffer */
copy = gst_buffer_copy_region (*buffer,
GST_BUFFER_COPY_ALL | GST_BUFFER_COPY_DEEP, 0, -1);
GST_LOG_OBJECT (pool, "copy buffer %p->%p", *buffer, copy);
/* and requeue so that we can continue capturing */
gst_v4l2_buffer_pool_release_buffer (bpool, *buffer);
*buffer = copy;
}
break;
}
case GST_V4L2_IO_USERPTR:
@ -1580,9 +1559,32 @@ gst_v4l2_buffer_pool_process (GstV4l2BufferPool * pool, GstBuffer ** buf)
if ((*buf)->pool == bpool) {
if (gst_buffer_get_size (*buf) == 0)
goto eos;
else
/* nothing, data was inside the buffer when we did _acquire() */
goto done;
/* start copying buffers when we are running low on buffers */
if (g_atomic_int_get (&pool->num_queued) < pool->copy_threshold) {
GstBuffer *copy;
if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP)) {
if (gst_buffer_pool_acquire_buffer (bpool, &copy,
NULL) == GST_FLOW_OK) {
gst_v4l2_buffer_pool_release_buffer (bpool, copy);
goto done;
}
}
/* copy the buffer */
copy = gst_buffer_copy_region (*buf,
GST_BUFFER_COPY_ALL | GST_BUFFER_COPY_DEEP, 0, -1);
GST_LOG_OBJECT (pool, "copy buffer %p->%p", *buf, copy);
/* and requeue so that we can continue capturing */
gst_buffer_unref (*buf);
*buf = copy;
}
/* nothing, data was inside the buffer when we did _acquire() */
goto done;
}
/* buffer not from our pool, grab a frame and copy it into the target */