C++ (Cpp) gst_jpeg_parse_push_buffer Beispiele

Beispiel #1

Datei: gstjpegparse.c Projekt: pli3/gst-plugins-bad

static gboolean
gst_jpeg_parse_sink_event (GstPad * pad, GstEvent * event)
{
  GstJpegParse *parse;
  gboolean res = TRUE;

  parse = GST_JPEG_PARSE (gst_pad_get_parent (pad));

  GST_DEBUG_OBJECT (parse, "event : %s", GST_EVENT_TYPE_NAME (event));

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_FLUSH_STOP:
      parse->priv->next_ts = GST_CLOCK_TIME_NONE;
      parse->priv->duration = GST_CLOCK_TIME_NONE;
      parse->priv->last_offset = 0;
      parse->priv->last_entropy_len = 0;
      parse->priv->last_resync = FALSE;
      gst_adapter_clear (parse->priv->adapter);
      break;
    case GST_EVENT_EOS:{
      /* Push the remaining data, even though it's incomplete */
      guint available = gst_adapter_available (parse->priv->adapter);
      if (available > 0)
        gst_jpeg_parse_push_buffer (parse, available);
      res = gst_pad_push_event (parse->priv->srcpad, event);
      break;
    }
    case GST_EVENT_NEWSEGMENT:
      /* Discard any data in the adapter.  There should have been an EOS before
       * to flush it. */
      gst_adapter_clear (parse->priv->adapter);
      res = gst_pad_push_event (parse->priv->srcpad, event);
      parse->priv->new_segment = TRUE;
      break;
    case GST_EVENT_TAG:{
      if (!parse->priv->new_segment)
        res = gst_pad_event_default (pad, event);
      else {
        GstTagList *taglist = NULL;

        gst_event_parse_tag (event, &taglist);
        /* Hold on to the tags till the srcpad caps are definitely set */
        gst_tag_list_insert (get_tag_list (parse), taglist,
            GST_TAG_MERGE_REPLACE);
        GST_DEBUG ("collected tags: %" GST_PTR_FORMAT, parse->priv->tags);
        gst_event_unref (event);
      }
      break;
    }
    default:
      res = gst_pad_event_default (pad, event);
      break;
  }

  gst_object_unref (parse);
  return res;
}

Beispiel #2

Datei: gstjpegparse.c Projekt: drothlis/gst-plugins-bad

static GstFlowReturn
gst_jpeg_parse_chain (GstPad * pad, GstBuffer * buf)
{
  GstJpegParse *parse;
  gint len;
  GstClockTime timestamp, duration;
  GstFlowReturn ret = GST_FLOW_OK;

  parse = GST_JPEG_PARSE (GST_PAD_PARENT (pad));

  timestamp = GST_BUFFER_TIMESTAMP (buf);
  duration = GST_BUFFER_DURATION (buf);

  gst_adapter_push (parse->priv->adapter, buf);

  while (ret == GST_FLOW_OK && gst_jpeg_parse_skip_to_jpeg_header (parse)) {
    if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)))
      parse->priv->next_ts = timestamp;

    if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (duration)))
      parse->priv->duration = duration;

    /* check if we already have a EOI */
    len = gst_jpeg_parse_get_image_length (parse);
    if (len == 0) {
      return GST_FLOW_OK;
    } else if (len < 0) {
      gst_adapter_flush (parse->priv->adapter, -len);
      continue;
    }

    GST_LOG_OBJECT (parse, "parsed image of size %d", len);

    /* now we have enough in the adapter to process a full jpeg image */
    ret = gst_jpeg_parse_push_buffer (parse, len);
  }

  GST_DEBUG_OBJECT (parse, "No further start marker found.");
  return ret;
}