C++ (Cpp) PAD_WAIT_EVENT示例

示例#1

文件： gstaggregator.c 项目： kakaroto/gst-plugins-bad

static GstFlowReturn
_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
{
  GstBuffer *actual_buf = buffer;
  GstAggregator *self = GST_AGGREGATOR (object);
  GstAggregatorPrivate *priv = self->priv;
  GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
  GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (object);

  GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);

  if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
    goto flushing;

  if (g_atomic_int_get (&aggpad->priv->pending_eos) == TRUE)
    goto eos;

  PAD_LOCK_EVENT (aggpad);
  if (aggpad->buffer) {
    GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
    PAD_WAIT_EVENT (aggpad);
  }
  PAD_UNLOCK_EVENT (aggpad);

  if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
    goto flushing;


  if (aggclass->clip) {
    aggclass->clip (self, aggpad, buffer, &actual_buf);
  }

  PAD_LOCK_EVENT (aggpad);
  if (aggpad->buffer)
    gst_buffer_unref (aggpad->buffer);
  aggpad->buffer = actual_buf;
  PAD_UNLOCK_EVENT (aggpad);

  _add_aggregate_gsource (self);

  GST_DEBUG_OBJECT (aggpad, "Done chaining");

  return priv->flow_return;

flushing:

  gst_buffer_unref (buffer);
  GST_DEBUG_OBJECT (aggpad, "We are flushing");

  return GST_FLOW_FLUSHING;

eos:

  gst_buffer_unref (buffer);
  GST_DEBUG_OBJECT (pad, "We are EOS already...");

  return GST_FLOW_EOS;
}

示例#2

文件： gstaggregator.c 项目： jledet/gst-plugins-bad

static GstFlowReturn
_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
{
  GstBuffer *actual_buf = buffer;
  GstAggregator *self = GST_AGGREGATOR (object);
  GstAggregatorPrivate *priv = self->priv;
  GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
  GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (object);
  GstClockTime timeout = gst_aggregator_get_timeout (self);
  GstClockTime now;

  GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
  if (aggpad->priv->timeout_id) {
    gst_clock_id_unschedule (aggpad->priv->timeout_id);
    gst_clock_id_unref (aggpad->priv->timeout_id);
    aggpad->priv->timeout_id = NULL;
  }
  g_atomic_int_set (&aggpad->unresponsive, FALSE);

  PAD_STREAM_LOCK (aggpad);

  if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
    goto flushing;

  if (g_atomic_int_get (&aggpad->priv->pending_eos) == TRUE)
    goto eos;

  PAD_LOCK_EVENT (aggpad);

  if (aggpad->buffer) {
    GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
    PAD_WAIT_EVENT (aggpad);
  }
  PAD_UNLOCK_EVENT (aggpad);

  if (g_atomic_int_get (&aggpad->priv->flushing) == TRUE)
    goto flushing;

  if (aggclass->clip) {
    aggclass->clip (self, aggpad, buffer, &actual_buf);
  }

  PAD_LOCK_EVENT (aggpad);
  if (aggpad->buffer)
    gst_buffer_unref (aggpad->buffer);
  aggpad->buffer = actual_buf;
  PAD_UNLOCK_EVENT (aggpad);
  PAD_STREAM_UNLOCK (aggpad);

  QUEUE_PUSH (self);

  if (GST_CLOCK_TIME_IS_VALID (timeout)) {
    now = gst_clock_get_time (self->clock);
    aggpad->priv->timeout_id =
        gst_clock_new_single_shot_id (self->clock, now + timeout);
    gst_clock_id_wait_async (aggpad->priv->timeout_id, _unresponsive_timeout,
        gst_object_ref (aggpad), gst_object_unref);
  }

  GST_DEBUG_OBJECT (aggpad, "Done chaining");

  return priv->flow_return;

flushing:
  PAD_STREAM_UNLOCK (aggpad);

  gst_buffer_unref (buffer);
  GST_DEBUG_OBJECT (aggpad, "We are flushing");

  return GST_FLOW_FLUSHING;

eos:
  PAD_STREAM_UNLOCK (aggpad);

  gst_buffer_unref (buffer);
  GST_DEBUG_OBJECT (pad, "We are EOS already...");

  return GST_FLOW_EOS;
}