C++ (Cpp) vorbis_dsp_headerin Examples

Example #1

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

static GstFlowReturn
vorbis_handle_header_packet (GstVorbisDec * vd, ogg_packet * packet)
{
  GstFlowReturn res;
  gint ret;

  GST_DEBUG_OBJECT (vd, "parsing header packet");

  /* Packetno = 0 if the first byte is exactly 0x01 */
  packet->b_o_s = ((gst_ogg_packet_data (packet))[0] == 0x1) ? 1 : 0;

#ifdef USE_TREMOLO
  if ((ret = vorbis_dsp_headerin (&vd->vi, &vd->vc, packet)))
#else
  if ((ret = vorbis_synthesis_headerin (&vd->vi, &vd->vc, packet)))
#endif
    goto header_read_error;

  switch ((gst_ogg_packet_data (packet))[0]) {
    case 0x01:
      res = vorbis_handle_identification_packet (vd);
      break;
    case 0x03:
      res = vorbis_handle_comment_packet (vd, packet);
      break;
    case 0x05:
      res = vorbis_handle_type_packet (vd);
      break;
    default:
      /* ignore */
      g_warning ("unknown vorbis header packet found");
      res = GST_FLOW_OK;
      break;
  }

  return res;

  /* ERRORS */
header_read_error:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
        (NULL), ("couldn't read header packet (%d)", ret));
    return GST_FLOW_ERROR;
  }
}

Example #2

File: vorbisfile.c Project: ADTL/realtouch-stm32f4

static int _fetch_headers(OggVorbis_File *vf,
			  vorbis_info *vi,
			  vorbis_comment *vc,
			  ogg_uint32_t *serialno,
			  ogg_page *og_ptr){
  ogg_page og={0,0,0,0};
  ogg_packet op={0,0,0,0,0,0};
  int i,ret;
  
  if(vf->ready_state>OPENED)_decode_clear(vf);

  if(!og_ptr){
    ogg_int64_t llret=_get_next_page(vf,&og,CHUNKSIZE);
    if(llret==OV_EREAD)return OV_EREAD;
    if(llret<0)return OV_ENOTVORBIS;
    og_ptr=&og;
  }

  ogg_stream_reset_serialno(vf->os,ogg_page_serialno(og_ptr));
  if(serialno)*serialno=vf->os->serialno;
  
  /* extract the initial header from the first page and verify that the
     Ogg bitstream is in fact Vorbis data */
  
  vorbis_info_init(vi);
  vorbis_comment_init(vc);
  
  i=0;
  while(i<3){
    ogg_stream_pagein(vf->os,og_ptr);
    while(i<3){
      int result=ogg_stream_packetout(vf->os,&op);
      if(result==0)break;
      if(result==-1){
	ret=OV_EBADHEADER;
	goto bail_header;
      }
      if((ret=vorbis_dsp_headerin(vi,vc,&op))){
	goto bail_header;
      }
      i++;
    }
    if(i<3)
      if(_get_next_page(vf,og_ptr,CHUNKSIZE)<0){
	ret=OV_EBADHEADER;
	goto bail_header;
      }
  }

  ogg_packet_release(&op);
  ogg_page_release(&og);
  vf->ready_state=LINKSET;
  return 0; 

 bail_header:
  ogg_packet_release(&op);
  ogg_page_release(&og);
  vorbis_info_clear(vi);
  vorbis_comment_clear(vc);
  vf->ready_state=OPENED;

  return ret;
}