static void
default_release_buffer (GstBufferPool * pool, GstBuffer * buffer)
{
GST_LOG_OBJECT (pool, "released buffer %p %d", buffer,
GST_MINI_OBJECT_FLAGS (buffer));
/* memory should be untouched */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY))
goto discard;
/* size should have been reset. This is not a catch all, pool with
* size requirement per memory should do their own check. */
if (gst_buffer_get_size (buffer) != pool->priv->size)
goto discard;
/* all memory should be exclusive to this buffer (and thus be writable) */
if (!gst_buffer_is_all_memory_writable (buffer))
goto discard;
/* keep it around in our queue */
gst_atomic_queue_push (pool->priv->queue, buffer);
gst_poll_write_control (pool->priv->poll);
return;
discard:
{
do_free_buffer (pool, buffer);
return;
}
}
static void
gst_v4l2_allocator_release (GstV4l2Allocator * allocator, GstV4l2Memory * mem)
{
GstV4l2MemoryGroup *group = mem->group;
GST_LOG_OBJECT (allocator, "plane %i of buffer %u released",
mem->plane, group->buffer.index);
switch (allocator->memory) {
case V4L2_MEMORY_DMABUF:
close (mem->dmafd);
mem->dmafd = -1;
break;
case V4L2_MEMORY_USERPTR:
mem->data = NULL;
break;
default:
break;
}
/* When all memory are back, put the group back in the free queue */
if (g_atomic_int_dec_and_test (&group->mems_allocated)) {
GST_LOG_OBJECT (allocator, "buffer %u released", group->buffer.index);
gst_atomic_queue_push (allocator->free_queue, group);
g_signal_emit (allocator, gst_v4l2_allocator_signals[GROUP_RELEASED], 0);
}
/* Keep last, allocator may be freed after this call */
g_object_unref (allocator);
}
static void
default_release_buffer (GstBufferPool * pool, GstBuffer * buffer)
{
/* keep it around in our queue */
GST_LOG_OBJECT (pool, "released buffer %p", buffer);
gst_atomic_queue_push (pool->priv->queue, buffer);
gst_poll_write_control (pool->priv->poll);
}
/* Emitted by vlcvideosink for every buffer,
* Adds the buffer to the queue */
static void frame_handoff_cb( GstElement *p_ele, GstBuffer *p_buf,
gpointer p_data )
{
VLC_UNUSED( p_ele );
decoder_t *p_dec = p_data;
decoder_sys_t *p_sys = p_dec->p_sys;
/* Push the buffer to the queue */
gst_atomic_queue_push( p_sys->p_que, gst_buffer_ref( p_buf ) );
}
static void
default_release_buffer (GstBufferPool * pool, GstBuffer * buffer)
{
GST_LOG_OBJECT (pool, "released buffer %p %d", buffer,
GST_MINI_OBJECT_FLAGS (buffer));
/* memory should be untouched */
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY)))
goto memory_tagged;
/* size should have been reset. This is not a catch all, pool with
* size requirement per memory should do their own check. */
if (G_UNLIKELY (gst_buffer_get_size (buffer) != pool->priv->size))
goto size_changed;
/* all memory should be exclusive to this buffer (and thus be writable) */
if (G_UNLIKELY (!gst_buffer_is_all_memory_writable (buffer)))
goto not_writable;
/* keep it around in our queue */
gst_atomic_queue_push (pool->priv->queue, buffer);
gst_poll_write_control (pool->priv->poll);
return;
memory_tagged:
{
GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, pool,
"discarding buffer %p: memory tag set", buffer);
goto discard;
}
size_changed:
{
GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, pool,
"discarding buffer %p: size %" G_GSIZE_FORMAT " != %u",
buffer, gst_buffer_get_size (buffer), pool->priv->size);
goto discard;
}
not_writable:
{
GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, pool,
"discarding buffer %p: memory not writable", buffer);
goto discard;
}
discard:
{
do_free_buffer (pool, buffer);
return;
}
}
static void
_cleanup_failed_alloc (GstV4l2Allocator * allocator, GstV4l2MemoryGroup * group)
{
if (group->mems_allocated > 0) {
gint i;
/* If one or more mmap worked, we need to unref the memory, otherwise
* they will keep a ref on the allocator and leak it. This will put back
* the group into the free_queue */
for (i = 0; i < group->n_mem; i++)
gst_memory_unref (group->mem[i]);
} else {
/* Otherwise, group has to be on free queue for _stop() to work */
gst_atomic_queue_push (allocator->free_queue, group);
}
}
guint
gst_v4l2_allocator_start (GstV4l2Allocator * allocator, guint32 count,
guint32 memory)
{
struct v4l2_requestbuffers breq = { count, allocator->type, memory };
gboolean can_allocate;
gint i;
g_return_val_if_fail (count != 0, 0);
GST_OBJECT_LOCK (allocator);
if (g_atomic_int_get (&allocator->active))
goto already_active;
if (v4l2_ioctl (allocator->video_fd, VIDIOC_REQBUFS, &breq) < 0)
goto reqbufs_failed;
if (breq.count < 1)
goto out_of_memory;
switch (memory) {
case V4L2_MEMORY_MMAP:
can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, MMAP);
break;
case V4L2_MEMORY_USERPTR:
can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, USERPTR);
break;
case V4L2_MEMORY_DMABUF:
can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, DMABUF);
break;
default:
can_allocate = FALSE;
break;
}
GST_DEBUG_OBJECT (allocator, "allocated %u %s buffers out of %u requested",
breq.count, memory_type_to_str (memory), count);
allocator->can_allocate = can_allocate;
allocator->count = breq.count;
allocator->memory = memory;
/* Create memory groups */
for (i = 0; i < allocator->count; i++) {
allocator->groups[i] = gst_v4l2_memory_group_new (allocator, i);
if (allocator->groups[i] == NULL)
goto error;
gst_atomic_queue_push (allocator->free_queue, allocator->groups[i]);
}
g_atomic_int_set (&allocator->active, TRUE);
done:
GST_OBJECT_UNLOCK (allocator);
return breq.count;
already_active:
{
GST_ERROR_OBJECT (allocator, "allocator already active");
goto error;
}
reqbufs_failed:
{
GST_ERROR_OBJECT (allocator,
"error requesting %d buffers: %s", count, g_strerror (errno));
goto error;
}
out_of_memory:
{
GST_ERROR_OBJECT (allocator, "Not enough memory to allocate buffers");
goto error;
}
error:
{
breq.count = 0;
goto done;
}
}
/**
* gst_bus_post:
* @bus: a #GstBus to post on
* @message: (transfer full): the #GstMessage to post
*
* Post a message on the given bus. Ownership of the message
* is taken by the bus.
*
* Returns: %TRUE if the message could be posted, %FALSE if the bus is flushing.
*
* MT safe.
*/
gboolean
gst_bus_post (GstBus * bus, GstMessage * message)
{
GstBusSyncReply reply = GST_BUS_PASS;
GstBusSyncHandler handler;
gboolean emit_sync_message;
gpointer handler_data;
g_return_val_if_fail (GST_IS_BUS (bus), FALSE);
g_return_val_if_fail (GST_IS_MESSAGE (message), FALSE);
GST_DEBUG_OBJECT (bus, "[msg %p] posting on bus %" GST_PTR_FORMAT, message,
message);
/* check we didn't accidentally add a public flag that maps to same value */
g_assert (!GST_MINI_OBJECT_FLAG_IS_SET (message,
GST_MESSAGE_FLAG_ASYNC_DELIVERY));
GST_OBJECT_LOCK (bus);
/* check if the bus is flushing */
if (GST_OBJECT_FLAG_IS_SET (bus, GST_BUS_FLUSHING))
goto is_flushing;
handler = bus->priv->sync_handler;
handler_data = bus->priv->sync_handler_data;
emit_sync_message = bus->priv->num_sync_message_emitters > 0;
GST_OBJECT_UNLOCK (bus);
/* first call the sync handler if it is installed */
if (handler)
reply = handler (bus, message, handler_data);
/* emit sync-message if requested to do so via
gst_bus_enable_sync_message_emission. terrible but effective */
if (emit_sync_message && reply != GST_BUS_DROP
&& handler != gst_bus_sync_signal_handler)
gst_bus_sync_signal_handler (bus, message, NULL);
/* If this is a bus without async message delivery
* always drop the message */
if (!bus->priv->poll)
reply = GST_BUS_DROP;
/* now see what we should do with the message */
switch (reply) {
case GST_BUS_DROP:
/* drop the message */
GST_DEBUG_OBJECT (bus, "[msg %p] dropped", message);
break;
case GST_BUS_PASS:
/* pass the message to the async queue, refcount passed in the queue */
GST_DEBUG_OBJECT (bus, "[msg %p] pushing on async queue", message);
gst_atomic_queue_push (bus->priv->queue, message);
gst_poll_write_control (bus->priv->poll);
GST_DEBUG_OBJECT (bus, "[msg %p] pushed on async queue", message);
break;
case GST_BUS_ASYNC:
{
/* async delivery, we need a mutex and a cond to block
* on */
GCond *cond = GST_MESSAGE_GET_COND (message);
GMutex *lock = GST_MESSAGE_GET_LOCK (message);
g_cond_init (cond);
g_mutex_init (lock);
GST_MINI_OBJECT_FLAG_SET (message, GST_MESSAGE_FLAG_ASYNC_DELIVERY);
GST_DEBUG_OBJECT (bus, "[msg %p] waiting for async delivery", message);
/* now we lock the message mutex, send the message to the async
* queue. When the message is handled by the app and destroyed,
* the cond will be signalled and we can continue */
g_mutex_lock (lock);
gst_atomic_queue_push (bus->priv->queue, message);
gst_poll_write_control (bus->priv->poll);
/* now block till the message is freed */
g_cond_wait (cond, lock);
/* we acquired a new ref from gst_message_dispose() so we can clean up */
g_mutex_unlock (lock);
GST_DEBUG_OBJECT (bus, "[msg %p] delivered asynchronously", message);
GST_MINI_OBJECT_FLAG_UNSET (message, GST_MESSAGE_FLAG_ASYNC_DELIVERY);
g_mutex_clear (lock);
g_cond_clear (cond);
gst_message_unref (message);
break;
}
default:
g_warning ("invalid return from bus sync handler");
break;
}
return TRUE;
/* ERRORS */
is_flushing:
{
GST_DEBUG_OBJECT (bus, "bus is flushing");
GST_OBJECT_UNLOCK (bus);
gst_message_unref (message);
return FALSE;
}
}
static void gst_scream_queue_srcpad_loop(GstScreamQueue *self)
{
GstScreamDataQueueItem *item;
GstScreamDataQueueRtpItem *rtp_item;
GstScreamStream *stream;
guint stream_id;
guint64 time_now_us, time_until_next_approve = 0;
GstBuffer *buffer;
time_now_us = get_gst_time_us(self);
if (G_UNLIKELY(time_now_us == 0)) {
goto end;
}
if (time_now_us >= self->next_approve_time) {
time_until_next_approve = gst_scream_controller_approve_transmits(self->scream_controller,
time_now_us);
} else {
GST_LOG_OBJECT(self, "Time is %" G_GUINT64_FORMAT ", waiting %" G_GUINT64_FORMAT,
time_now_us, self->next_approve_time);
}
/* Send all approved packets */
while (!gst_data_queue_is_empty(self->approved_packets)) {
if (G_UNLIKELY(!gst_data_queue_pop(self->approved_packets,
(GstDataQueueItem **)&rtp_item))) {
GST_WARNING_OBJECT(self, "Failed to pop from approved packets queue. Flushing?");
goto end; /* flushing */
}
buffer = GST_BUFFER(((GstDataQueueItem *)rtp_item)->object);
gst_pad_push(self->src_pad, buffer);
GST_LOG_OBJECT(self, "pushing: pt = %u, seq: %u, pass: %u", rtp_item->rtp_pt, rtp_item->rtp_seq, self->pass_through);
if (rtp_item->adapted) {
guint tmp_time;
stream_id = ((GstScreamDataQueueItem *)rtp_item)->rtp_ssrc;
tmp_time = gst_scream_controller_packet_transmitted(self->scream_controller, stream_id,
rtp_item->rtp_payload_size, rtp_item->rtp_seq, time_now_us);
time_until_next_approve = MIN(time_until_next_approve, tmp_time);
}
g_slice_free(GstScreamDataQueueRtpItem, rtp_item);
}
self->next_approve_time = time_now_us + time_until_next_approve;
GST_LOG_OBJECT(self, "Popping or waiting %" G_GUINT64_FORMAT, time_until_next_approve);
item = (GstScreamDataQueueItem *)g_async_queue_timeout_pop(self->incoming_packets, time_until_next_approve);
if (!item) {
goto end;
}
stream_id = item->rtp_ssrc;
if (item->type == GST_SCREAM_DATA_QUEUE_ITEM_TYPE_RTP) {
GstScreamDataQueueRtpItem *rtp_item = (GstScreamDataQueueRtpItem *)item;
stream = get_stream(self, item->rtp_ssrc, rtp_item->rtp_pt);
if (!stream) {
rtp_item->adapted = FALSE;
GST_LOG_OBJECT(self, "!adapted, approving: pt = %u, seq: %u, pass: %u",
rtp_item->rtp_pt, rtp_item->rtp_seq, self->pass_through);
gst_data_queue_push(self->approved_packets, (GstDataQueueItem *)item);
} else {
gst_atomic_queue_push(stream->packet_queue, rtp_item);
stream->enqueued_payload_size += rtp_item->rtp_payload_size;
stream->enqueued_packets++;
rtp_item->adapted = TRUE;
self->next_approve_time = 0;
gst_scream_controller_new_rtp_packet(self->scream_controller, stream_id, rtp_item->rtp_ts,
rtp_item->enqueued_time, stream->enqueued_payload_size, rtp_item->rtp_payload_size);
}
} else { /* item->type == GST_SCREAM_DATA_QUEUE_ITEM_TYPE_RTCP */
GstScreamDataQueueRtcpItem *rtcp_item = (GstScreamDataQueueRtcpItem *)item;
gst_scream_controller_incoming_feedback(self->scream_controller, stream_id, time_now_us,
rtcp_item->timestamp, rtcp_item->highest_seq, rtcp_item->n_loss, rtcp_item->n_ecn, rtcp_item->qbit);
((GstDataQueueItem *)item)->destroy(item);
}
end:
return;
}