C++ (Cpp) theora_handle_data_packet Examples

Example #1

static GstFlowReturn
theora_dec_decode_buffer (GstTheoraDec * dec, GstBuffer * buf)
{
  ogg_packet packet;
  GstFlowReturn result = GST_FLOW_OK;

  /* make ogg_packet out of the buffer */
  packet.packet = GST_BUFFER_DATA (buf);
  packet.bytes = GST_BUFFER_SIZE (buf);
  packet.granulepos = GST_BUFFER_OFFSET_END (buf);
  packet.packetno = 0;          /* we don't really care */
  packet.b_o_s = dec->have_header ? 0 : 1;
  /* EOS does not matter for the decoder */
  packet.e_o_s = 0;

  if (dec->have_header) {
    if (packet.granulepos != -1) {
      dec->granulepos = packet.granulepos;
      dec->last_timestamp = _theora_granule_start_time (dec, packet.granulepos);
    } else if (dec->last_timestamp != -1) {
      dec->last_timestamp = _theora_granule_start_time (dec, dec->granulepos);
    }
    if (dec->last_timestamp == -1 && GST_BUFFER_TIMESTAMP_IS_VALID (buf))
      dec->last_timestamp = GST_BUFFER_TIMESTAMP (buf);
  } else {
    dec->last_timestamp = -1;
  }

  GST_DEBUG_OBJECT (dec, "header=%02x packetno=%lld, granule pos=%"
      G_GINT64_FORMAT ", outtime=%" GST_TIME_FORMAT,
      packet.bytes ? packet.packet[0] : -1, packet.packetno, packet.granulepos,
      GST_TIME_ARGS (dec->last_timestamp));

  /* switch depending on packet type. A zero byte packet is always a data
   * packet; we don't dereference it in that case. */
  if (packet.bytes && packet.packet[0] & 0x80) {
    if (dec->have_header) {
      GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
      goto done;
    }
    result = theora_handle_header_packet (dec, &packet);
  } else {
    result = theora_handle_data_packet (dec, &packet, dec->last_timestamp);
  }

done:
  /* interpolate granule pos */
  dec->granulepos = _inc_granulepos (dec, dec->granulepos);

  return result;
}

Example #2

File: gsttheoradec.c Project: aHuaLiu/gst-plugins-base

static GstFlowReturn
theora_dec_decode_buffer (GstTheoraDec * dec, GstBuffer * buf,
    GstVideoCodecFrame * frame)
{
  ogg_packet packet;
  GstFlowReturn result = GST_FLOW_OK;
  GstMapInfo minfo;

  /* make ogg_packet out of the buffer */
  gst_buffer_map (buf, &minfo, GST_MAP_READ);
  packet.packet = minfo.data;
  packet.bytes = minfo.size;
  packet.granulepos = -1;
  packet.packetno = 0;          /* we don't really care */
  packet.b_o_s = dec->have_header ? 0 : 1;
  /* EOS does not matter for the decoder */
  packet.e_o_s = 0;

  GST_LOG_OBJECT (dec, "decode buffer of size %ld", packet.bytes);

  GST_DEBUG_OBJECT (dec, "header=%02x", packet.bytes ? packet.packet[0] : -1);

  /* switch depending on packet type. A zero byte packet is always a data
   * packet; we don't dereference it in that case. */
  if (packet.bytes && packet.packet[0] & 0x80) {
    if (dec->have_header) {
      GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
      GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
          GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
      result = GST_CUSTOM_FLOW_DROP;
      goto done;
    }
    result = theora_handle_header_packet (dec, &packet);
    /* header packets are not meant to be displayed */
    /* FIXME : This is a temporary hack. The proper fix would be to
     * not call _finish_frame() for these types of packets */
    GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
        GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
  } else {
    result = theora_handle_data_packet (dec, &packet, frame);
  }

done:
  gst_buffer_unmap (buf, &minfo);

  return result;
}

Example #3

static GstFlowReturn
theora_dec_decode_buffer (GstTheoraDec * dec, GstBuffer * buf)
{
  ogg_packet packet;
  GstFlowReturn result = GST_FLOW_OK;
  GstClockTime timestamp, duration;

  /* make ogg_packet out of the buffer */
  packet.packet = GST_BUFFER_DATA (buf);
  packet.bytes = GST_BUFFER_SIZE (buf);
  packet.granulepos = -1;
  packet.packetno = 0;          /* we don't really care */
  packet.b_o_s = dec->have_header ? 0 : 1;
  /* EOS does not matter for the decoder */
  packet.e_o_s = 0;

  GST_LOG_OBJECT (dec, "decode buffer of size %ld", packet.bytes);

  /* save last seem timestamp for interpolating the next timestamps using the
   * framerate when we need to */
  timestamp = GST_BUFFER_TIMESTAMP (buf);
  duration = GST_BUFFER_DURATION (buf);

  GST_DEBUG_OBJECT (dec, "header=%02x, outtime=%" GST_TIME_FORMAT,
      packet.bytes ? packet.packet[0] : -1, GST_TIME_ARGS (timestamp));

  /* switch depending on packet type. A zero byte packet is always a data
   * packet; we don't dereference it in that case. */
  if (packet.bytes && packet.packet[0] & 0x80) {
    if (dec->have_header) {
      GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
      goto done;
    }
    result = theora_handle_header_packet (dec, &packet);
  } else {
    result = theora_handle_data_packet (dec, &packet, timestamp, duration);
  }

done:
  return result;
}