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v4l2bufferpool: Get number of allocated buffers from allocator

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The value of num_allocated buffer would get confused when
buffer are being discarded.
This commit is contained in:
Nicolas Dufresne 2014-05-05 12:07:31 -04:00 committed by Nicolas Dufresne
parent 7aed4a9806
commit f3ecbeb577
2 changed files with 17 additions and 10 deletions
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26
sys/v4l2/gstv4l2bufferpool.c
View file

@ -460,7 +460,6 @@ gst_v4l2_buffer_pool_alloc_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
crop->width = info->height;
}
pool->num_allocated++;
*buffer = newbuf;
return GST_FLOW_OK;
@ -610,13 +609,16 @@ start_streaming (GstV4l2BufferPool * pool)
{
/* For capture device, we need to re-enqueue buffers before be can let
* the driver stream again */
if (!V4L2_TYPE_IS_OUTPUT (obj->type)) {
if (!V4L2_TYPE_IS_OUTPUT (obj->type) && pool->vallocator) {
GstBufferPool *bpool = GST_BUFFER_POOL (pool);
GstBufferPoolAcquireParams params = { 0 };
gint n_to_q = pool->num_allocated - pool->num_queued;
gsize num_allocated, num_to_queue;
GstFlowReturn ret;
while (n_to_q > 0) {
num_allocated = gst_v4l2_allocator_num_allocated (pool->vallocator);
num_to_queue = num_allocated - pool->num_queued;
while (num_to_queue > 0) {
GstBuffer *buf;
params.flags = GST_BUFFER_POOL_ACQUIRE_FLAG_DONTWAIT;
@ -627,10 +629,10 @@ start_streaming (GstV4l2BufferPool * pool)
goto requeue_failed;
gst_v4l2_buffer_pool_release_buffer (bpool, buf);
n_to_q--;
num_to_queue--;
}
if (pool->num_allocated != pool->num_queued)
if (num_allocated != pool->num_queued)
goto requeue_failed;
}
@ -799,7 +801,6 @@ gst_v4l2_buffer_pool_start (GstBufferPool * bpool)
pool->size = size;
pool->copy_threshold = copy_threshold;
pool->num_buffers = num_buffers;
pool->num_allocated = 0;
pool->num_queued = 0;
gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
@ -883,6 +884,9 @@ stop_streaming (GstV4l2BufferPool * pool)
case GST_V4L2_IO_USERPTR:
case GST_V4L2_IO_DMABUF:
case GST_V4L2_IO_DMABUF_IMPORT:
{
gsize num_allocated;
if (v4l2_ioctl (pool->video_fd, VIDIOC_STREAMOFF, &obj->type) < 0)
goto stop_failed;
@ -890,7 +894,9 @@ stop_streaming (GstV4l2BufferPool * pool)
gst_v4l2_allocator_flush (pool->vallocator);
for (i = 0; i < pool->num_allocated; i++) {
num_allocated = gst_v4l2_allocator_num_allocated (pool->vallocator);
for (i = 0; i < num_allocated; i++) {
if (pool->buffers[i]) {
GstBufferPool *bpool = (GstBufferPool *) pool;
GstBuffer *buffer = pool->buffers[i];
@ -913,6 +919,7 @@ stop_streaming (GstV4l2BufferPool * pool)
g_return_val_if_fail (pool->num_queued == 0, FALSE);
break;
}
default:
g_return_val_if_reached (FALSE);
break;
@ -1691,7 +1698,8 @@ gst_v4l2_buffer_pool_process (GstV4l2BufferPool * pool, GstBuffer ** buf)
}
}
if (pool->num_queued == pool->num_allocated) {
if (pool->num_queued ==
gst_v4l2_allocator_num_allocated (pool->vallocator)) {
GstBuffer *out;
/* all buffers are queued, try to dequeue one and release it back
* into the pool so that _acquire can get to it again. */

1
sys/v4l2/gstv4l2bufferpool.h
View file

@ -63,7 +63,6 @@ struct _GstV4l2BufferPool
gboolean add_cropmeta;
guint num_buffers; /* number of buffers we use */
guint num_allocated; /* number of buffers allocated by the driver */
guint num_queued; /* number of buffers queued in the driver */
guint copy_threshold; /* when our pool runs lower, start handing out copies */