C++ (Cpp) GstCMApi::CMBufferQueueDequeueAndRetain Examples

Example #1

File: celvideosrc.c Project: Distrotech/gst-plugins-bad

static GstFlowReturn
gst_cel_video_src_create (GstPushSrc * pushsrc, GstBuffer ** buf)
{
  GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (pushsrc);
  GstCMApi *cm = self->ctx->cm;
  CMSampleBufferRef sbuf;

  sbuf = cm->CMBufferQueueDequeueAndRetain (self->queue);

  while (sbuf == NULL) {
    QUEUE_READY_LOCK (self);
    while (!self->queue_is_ready && g_atomic_int_get (&self->is_running))
      QUEUE_READY_WAIT (self);
    self->queue_is_ready = FALSE;
    QUEUE_READY_UNLOCK (self);

    if (G_UNLIKELY (!g_atomic_int_get (&self->is_running)))
      goto shutting_down;

    sbuf = cm->CMBufferQueueDequeueAndRetain (self->queue);
  }

  if (G_UNLIKELY (!g_atomic_int_get (&self->is_running)))
    goto shutting_down;

  *buf = gst_core_media_buffer_new (self->ctx, sbuf);
  gst_cel_video_src_timestamp_buffer (self, *buf);

  cm->FigSampleBufferRelease (sbuf);

  if (self->do_stats)
    gst_cel_video_src_update_statistics (self);

  return GST_FLOW_OK;

  /* ERRORS */
shutting_down:
  {
    cm->FigSampleBufferRelease (sbuf);
    return GST_FLOW_FLUSHING;
  }
}