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v4l2: Fix RW io mode

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In RW, allocator can be null, max_buffers can be zero, and we need not
to wait while the queue is empty since there is no queue.

https://bugzilla.gnome.org/show_bug.cgi?id=740633
This commit is contained in:
Nicolas Dufresne 2014-12-07 17:27:37 -05:00
parent d328eea5f2
commit 0e05faf91a
1 changed files with 11 additions and 6 deletions
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7
sys/v4l2/gstv4l2bufferpool.c
View file

@ -473,6 +473,7 @@ gst_v4l2_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, DMABUF); can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, DMABUF);
break; break;
case GST_V4L2_IO_RW: case GST_V4L2_IO_RW:
if (allocator)
pool->allocator = g_object_ref (allocator); pool->allocator = g_object_ref (allocator);
pool->params = params; pool->params = params;
/* No need to change the configuration */ /* No need to change the configuration */
@ -741,7 +742,7 @@ gst_v4l2_buffer_pool_start (GstBufferPool * bpool)
pool->min_latency = min_latency; pool->min_latency = min_latency;
pool->num_queued = 0; pool->num_queued = 0;
if (max_buffers < min_buffers) if (max_buffers != 0 && max_buffers < min_buffers)
max_buffers = min_buffers; max_buffers = min_buffers;
gst_buffer_pool_config_set_params (config, caps, size, min_buffers, gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
@ -957,10 +958,14 @@ gst_v4l2_buffer_pool_poll (GstV4l2BufferPool * pool)
{ {
gint ret; gint ret;
/* In RW mode there is no queue, hence no need to wait while the queue is
* empty */
if (pool->obj->mode != GST_V4L2_IO_RW) {
GST_OBJECT_LOCK (pool); GST_OBJECT_LOCK (pool);
while (pool->empty) while (pool->empty)
g_cond_wait (&pool->empty_cond, GST_OBJECT_GET_LOCK (pool)); g_cond_wait (&pool->empty_cond, GST_OBJECT_GET_LOCK (pool));
GST_OBJECT_UNLOCK (pool); GST_OBJECT_UNLOCK (pool);
}
if (!pool->can_poll_device) if (!pool->can_poll_device)
goto done; goto done;