示例#1
0
static GstStateChangeReturn
gst_rtp_dtmf_src_change_state (GstElement * element, GstStateChange transition)
{
  GstRTPDTMFSrc *dtmfsrc;
  GstStateChangeReturn result;
  gboolean no_preroll = FALSE;
  GstRTPDTMFSrcEvent *event = NULL;

  dtmfsrc = GST_RTP_DTMF_SRC (element);

  switch (transition) {
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      gst_rtp_dtmf_src_ready_to_paused (dtmfsrc);

      /* Flushing the event queue */
      while ((event = g_async_queue_try_pop (dtmfsrc->event_queue)) != NULL) {
        gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
        gst_rtp_dtmf_src_event_free (event);
      }
      dtmfsrc->last_event_was_start = FALSE;

      no_preroll = TRUE;
      break;
    default:
      break;
  }

  if ((result =
          GST_ELEMENT_CLASS (gst_rtp_dtmf_src_parent_class)->change_state
          (element, transition)) == GST_STATE_CHANGE_FAILURE)
    goto failure;

  switch (transition) {
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      no_preroll = TRUE;
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:

      /* Flushing the event queue */
      while ((event = g_async_queue_try_pop (dtmfsrc->event_queue)) != NULL) {
        gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
        gst_rtp_dtmf_src_event_free (event);
      }
      dtmfsrc->last_event_was_start = FALSE;

      /* Indicate that we don't do PRE_ROLL */
      break;

    default:
      break;
  }

  if (no_preroll && result == GST_STATE_CHANGE_SUCCESS)
    result = GST_STATE_CHANGE_NO_PREROLL;

  return result;

  /* ERRORS */
failure:
  {
    GST_ERROR_OBJECT (dtmfsrc, "parent failed state change");
    return result;
  }
}
示例#2
0
static GstFlowReturn
gst_rtp_dtmf_src_create (GstBaseSrc * basesrc, guint64 offset,
    guint length, GstBuffer ** buffer)
{
  GstRTPDTMFSrcEvent *event;
  GstRTPDTMFSrc *dtmfsrc;
  GstClock *clock;
  GstClockID *clockid;
  GstClockReturn clockret;
  GstMessage *message;
  GQueue messages = G_QUEUE_INIT;

  dtmfsrc = GST_RTP_DTMF_SRC (basesrc);

  do {

    if (dtmfsrc->payload == NULL) {
      GST_DEBUG_OBJECT (dtmfsrc, "popping");
      event = g_async_queue_pop (dtmfsrc->event_queue);

      GST_DEBUG_OBJECT (dtmfsrc, "popped %d", event->event_type);

      switch (event->event_type) {
        case RTP_DTMF_EVENT_TYPE_STOP:
          GST_WARNING_OBJECT (dtmfsrc,
              "Received a DTMF stop event when already stopped");
          gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
          break;

        case RTP_DTMF_EVENT_TYPE_START:
          dtmfsrc->first_packet = TRUE;
          dtmfsrc->last_packet = FALSE;
          /* Set the redundancy on the first packet */
          dtmfsrc->redundancy_count = dtmfsrc->packet_redundancy;
          if (!gst_rtp_dtmf_prepare_timestamps (dtmfsrc))
            goto no_clock;

          g_queue_push_tail (&messages,
              gst_dtmf_src_prepare_message (dtmfsrc, "dtmf-event-processed",
                  event));
          dtmfsrc->payload = event->payload;
          dtmfsrc->payload->duration =
              dtmfsrc->ptime * dtmfsrc->clock_rate / 1000;
          event->payload = NULL;
          break;

        case RTP_DTMF_EVENT_TYPE_PAUSE_TASK:
          /*
           * We're pushing it back because it has to stay in there until
           * the task is really paused (and the queue will then be flushed
           */
          GST_OBJECT_LOCK (dtmfsrc);
          if (dtmfsrc->paused) {
            g_async_queue_push (dtmfsrc->event_queue, event);
            goto paused_locked;
          }
          GST_OBJECT_UNLOCK (dtmfsrc);
          break;
      }

      gst_rtp_dtmf_src_event_free (event);
    } else if (!dtmfsrc->first_packet && !dtmfsrc->last_packet &&
        (dtmfsrc->timestamp - dtmfsrc->start_timestamp) / GST_MSECOND >=
        MIN_PULSE_DURATION) {
      GST_DEBUG_OBJECT (dtmfsrc, "try popping");
      event = g_async_queue_try_pop (dtmfsrc->event_queue);


      if (event != NULL) {
        GST_DEBUG_OBJECT (dtmfsrc, "try popped %d", event->event_type);

        switch (event->event_type) {
          case RTP_DTMF_EVENT_TYPE_START:
            GST_WARNING_OBJECT (dtmfsrc,
                "Received two consecutive DTMF start events");
            gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
            break;

          case RTP_DTMF_EVENT_TYPE_STOP:
            dtmfsrc->first_packet = FALSE;
            dtmfsrc->last_packet = TRUE;
            /* Set the redundancy on the last packet */
            dtmfsrc->redundancy_count = dtmfsrc->packet_redundancy;
            g_queue_push_tail (&messages,
                gst_dtmf_src_prepare_message (dtmfsrc, "dtmf-event-processed",
                    event));
            break;

          case RTP_DTMF_EVENT_TYPE_PAUSE_TASK:
            /*
             * We're pushing it back because it has to stay in there until
             * the task is really paused (and the queue will then be flushed)
             */
            GST_DEBUG_OBJECT (dtmfsrc, "pushing pause_task...");
            GST_OBJECT_LOCK (dtmfsrc);
            if (dtmfsrc->paused) {
              g_async_queue_push (dtmfsrc->event_queue, event);
              goto paused_locked;
            }
            GST_OBJECT_UNLOCK (dtmfsrc);
            break;
        }
        gst_rtp_dtmf_src_event_free (event);
      }
    }
  } while (dtmfsrc->payload == NULL);


  GST_DEBUG_OBJECT (dtmfsrc, "Processed events, now lets wait on the clock");

  clock = gst_element_get_clock (GST_ELEMENT (basesrc));
  if (!clock)
    goto no_clock;
  clockid = gst_clock_new_single_shot_id (clock, dtmfsrc->timestamp +
      gst_element_get_base_time (GST_ELEMENT (dtmfsrc)));
  gst_object_unref (clock);

  GST_OBJECT_LOCK (dtmfsrc);
  if (!dtmfsrc->paused) {
    dtmfsrc->clockid = clockid;
    GST_OBJECT_UNLOCK (dtmfsrc);

    clockret = gst_clock_id_wait (clockid, NULL);

    GST_OBJECT_LOCK (dtmfsrc);
    if (dtmfsrc->paused)
      clockret = GST_CLOCK_UNSCHEDULED;
  } else {
    clockret = GST_CLOCK_UNSCHEDULED;
  }
  gst_clock_id_unref (clockid);
  dtmfsrc->clockid = NULL;
  GST_OBJECT_UNLOCK (dtmfsrc);

  while ((message = g_queue_pop_head (&messages)) != NULL)
    gst_element_post_message (GST_ELEMENT (dtmfsrc), message);

  if (clockret == GST_CLOCK_UNSCHEDULED) {
    goto paused;
  }

send_last:

  if (dtmfsrc->dirty)
    if (!gst_rtp_dtmf_src_negotiate (basesrc))
      return GST_FLOW_NOT_NEGOTIATED;

  /* create buffer to hold the payload */
  *buffer = gst_rtp_dtmf_src_create_next_rtp_packet (dtmfsrc);

  if (dtmfsrc->redundancy_count)
    dtmfsrc->redundancy_count--;

  /* Only the very first one has a marker */
  dtmfsrc->first_packet = FALSE;

  /* This is the end of the event */
  if (dtmfsrc->last_packet == TRUE && dtmfsrc->redundancy_count == 0) {

    g_slice_free (GstRTPDTMFPayload, dtmfsrc->payload);
    dtmfsrc->payload = NULL;

    dtmfsrc->last_packet = FALSE;
  }

  return GST_FLOW_OK;

paused_locked:

  GST_OBJECT_UNLOCK (dtmfsrc);

paused:

  if (dtmfsrc->payload) {
    dtmfsrc->first_packet = FALSE;
    dtmfsrc->last_packet = TRUE;
    /* Set the redundanc on the last packet */
    dtmfsrc->redundancy_count = dtmfsrc->packet_redundancy;
    goto send_last;
  } else {
    return GST_FLOW_FLUSHING;
  }

no_clock:
  GST_ELEMENT_ERROR (dtmfsrc, STREAM, MUX, ("No available clock"),
      ("No available clock"));
  gst_pad_pause_task (GST_BASE_SRC_PAD (dtmfsrc));
  return GST_FLOW_ERROR;
}
示例#3
0
static GstFlowReturn
gst_dtmf_src_create (GstBaseSrc * basesrc, guint64 offset,
    guint length, GstBuffer ** buffer)
{
  GstBuffer *buf = NULL;
  GstDTMFSrcEvent *event;
  GstDTMFSrc *dtmfsrc;
  GstClock *clock;
  GstClockID *clockid;
  GstClockReturn clockret;

  dtmfsrc = GST_DTMF_SRC (basesrc);

  do {

    if (dtmfsrc->last_event == NULL) {
      GST_DEBUG_OBJECT (dtmfsrc, "popping");
      event = g_async_queue_pop (dtmfsrc->event_queue);

      GST_DEBUG_OBJECT (dtmfsrc, "popped %d", event->event_type);

      switch (event->event_type) {
        case DTMF_EVENT_TYPE_STOP:
          GST_WARNING_OBJECT (dtmfsrc,
              "Received a DTMF stop event when already stopped");
          gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
          break;
        case DTMF_EVENT_TYPE_START:
          gst_dtmf_prepare_timestamps (dtmfsrc);

          event->packet_count = 0;
          dtmfsrc->last_event = event;
          event = NULL;
          gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-processed",
              dtmfsrc->last_event);
          break;
        case DTMF_EVENT_TYPE_PAUSE_TASK:
          /*
           * We're pushing it back because it has to stay in there until
           * the task is really paused (and the queue will then be flushed)
           */
          GST_DEBUG_OBJECT (dtmfsrc, "pushing pause_task...");
          GST_OBJECT_LOCK (dtmfsrc);
          if (dtmfsrc->paused) {
            g_async_queue_push (dtmfsrc->event_queue, event);
            goto paused_locked;
          }
          GST_OBJECT_UNLOCK (dtmfsrc);
          break;
      }
      if (event)
        g_slice_free (GstDTMFSrcEvent, event);
    } else if (dtmfsrc->last_event->packet_count * dtmfsrc->interval >=
        MIN_DUTY_CYCLE) {
      event = g_async_queue_try_pop (dtmfsrc->event_queue);

      if (event != NULL) {

        switch (event->event_type) {
          case DTMF_EVENT_TYPE_START:
            GST_WARNING_OBJECT (dtmfsrc,
                "Received two consecutive DTMF start events");
            gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
            break;
          case DTMF_EVENT_TYPE_STOP:
            g_slice_free (GstDTMFSrcEvent, dtmfsrc->last_event);
            dtmfsrc->last_event = NULL;
            gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-processed", event);
            break;
          case DTMF_EVENT_TYPE_PAUSE_TASK:
            /*
             * We're pushing it back because it has to stay in there until
             * the task is really paused (and the queue will then be flushed)
             */
            GST_DEBUG_OBJECT (dtmfsrc, "pushing pause_task...");

            GST_OBJECT_LOCK (dtmfsrc);
            if (dtmfsrc->paused) {
              g_async_queue_push (dtmfsrc->event_queue, event);
              goto paused_locked;
            }
            GST_OBJECT_UNLOCK (dtmfsrc);

            break;
        }
        g_slice_free (GstDTMFSrcEvent, event);
      }
    }
  } while (dtmfsrc->last_event == NULL);

  GST_LOG_OBJECT (dtmfsrc, "end event check, now wait for the proper time");

  clock = gst_element_get_clock (GST_ELEMENT (basesrc));

  clockid = gst_clock_new_single_shot_id (clock, dtmfsrc->timestamp +
      gst_element_get_base_time (GST_ELEMENT (dtmfsrc)));
  gst_object_unref (clock);

  GST_OBJECT_LOCK (dtmfsrc);
  if (!dtmfsrc->paused) {
    dtmfsrc->clockid = clockid;
    GST_OBJECT_UNLOCK (dtmfsrc);

    clockret = gst_clock_id_wait (clockid, NULL);

    GST_OBJECT_LOCK (dtmfsrc);
    if (dtmfsrc->paused)
      clockret = GST_CLOCK_UNSCHEDULED;
  } else {
    clockret = GST_CLOCK_UNSCHEDULED;
  }
  gst_clock_id_unref (clockid);
  dtmfsrc->clockid = NULL;
  GST_OBJECT_UNLOCK (dtmfsrc);

  if (clockret == GST_CLOCK_UNSCHEDULED) {
    goto paused;
  }

  buf = gst_dtmf_src_create_next_tone_packet (dtmfsrc, dtmfsrc->last_event);

  GST_LOG_OBJECT (dtmfsrc, "Created buffer of size %" G_GSIZE_FORMAT,
      gst_buffer_get_size (buf));
  *buffer = buf;

  return GST_FLOW_OK;

paused_locked:
  GST_OBJECT_UNLOCK (dtmfsrc);

paused:

  if (dtmfsrc->last_event) {
    GST_DEBUG_OBJECT (dtmfsrc, "Stopping current event");
    /* Don't forget to release the stream lock */
    g_slice_free (GstDTMFSrcEvent, dtmfsrc->last_event);
    dtmfsrc->last_event = NULL;
  }

  return GST_FLOW_FLUSHING;

}