C++ (Cpp) gst_ogg_packet_from_wrapper Examples

Example #1

File: gstvorbisdec.c Project: pli3/gst-plugins-base

static GstFlowReturn
vorbis_dec_handle_header_buffer (GstVorbisDec * vd, GstBuffer * buffer)
{
  ogg_packet *packet;
  ogg_packet_wrapper packet_wrapper;

  gst_ogg_packet_wrapper_from_buffer (&packet_wrapper, buffer);
  packet = gst_ogg_packet_from_wrapper (&packet_wrapper);

  return vorbis_handle_header_packet (vd, packet);
}

Example #2

File: gstvorbisdec.c Project: Lachann/gst-plugins-base

static GstFlowReturn
vorbis_dec_handle_header_buffer (GstVorbisDec * vd, GstBuffer * buffer)
{
  ogg_packet *packet;
  ogg_packet_wrapper packet_wrapper;
  GstFlowReturn ret;
  GstMapInfo map;

  gst_ogg_packet_wrapper_map (&packet_wrapper, buffer, &map);
  packet = gst_ogg_packet_from_wrapper (&packet_wrapper);

  ret = vorbis_handle_header_packet (vd, packet);

  gst_ogg_packet_wrapper_unmap (&packet_wrapper, buffer, &map);

  return ret;
}

Example #3

File: gstvorbisdec.c Project: Lachann/gst-plugins-base

static GstFlowReturn
vorbis_dec_handle_frame (GstAudioDecoder * dec, GstBuffer * buffer)
{
  ogg_packet *packet;
  ogg_packet_wrapper packet_wrapper;
  GstFlowReturn result = GST_FLOW_OK;
  GstMapInfo map;
  GstVorbisDec *vd = GST_VORBIS_DEC (dec);

  /* no draining etc */
  if (G_UNLIKELY (!buffer))
    return GST_FLOW_OK;

  GST_LOG_OBJECT (vd, "got buffer %p", buffer);
  /* make ogg_packet out of the buffer */
  gst_ogg_packet_wrapper_map (&packet_wrapper, buffer, &map);
  packet = gst_ogg_packet_from_wrapper (&packet_wrapper);
  /* set some more stuff */
  packet->granulepos = -1;
  packet->packetno = 0;         /* we don't care */
  /* EOS does not matter, it is used in vorbis to implement clipping the last
   * block of samples based on the granulepos. We clip based on segments. */
  packet->e_o_s = 0;

  GST_LOG_OBJECT (vd, "decode buffer of size %ld", packet->bytes);

  /* error out on empty header packets, but just skip empty data packets */
  if (G_UNLIKELY (packet->bytes == 0)) {
    if (vd->initialized)
      goto empty_buffer;
    else
      goto empty_header;
  }

  /* switch depending on packet type */
  if ((gst_ogg_packet_data (packet))[0] & 1) {
    if (vd->initialized) {
      GST_WARNING_OBJECT (vd, "Already initialized, so ignoring header packet");
      goto done;
    }
    result = vorbis_handle_header_packet (vd, packet);
    if (result != GST_FLOW_OK)
      goto done;
    /* consumer header packet/frame */
    result = gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (vd), NULL, 1);
  } else {
    GstClockTime timestamp, duration;

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

    result = vorbis_handle_data_packet (vd, packet, timestamp, duration);
  }

done:
  GST_LOG_OBJECT (vd, "unmap buffer %p", buffer);
  gst_ogg_packet_wrapper_unmap (&packet_wrapper, buffer, &map);

  return result;

empty_buffer:
  {
    /* don't error out here, just ignore the buffer, it's invalid for vorbis
     * but not fatal. */
    GST_WARNING_OBJECT (vd, "empty buffer received, ignoring");
    result = GST_FLOW_OK;
    goto done;
  }

/* ERRORS */
empty_header:
  {
    GST_ELEMENT_ERROR (vd, STREAM, DECODE, (NULL), ("empty header received"));
    result = GST_FLOW_ERROR;
    goto done;
  }
}