Chris@1: /********************************************************************
Chris@1:  *                                                                  *
Chris@1:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Chris@1:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
Chris@1:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
Chris@1:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
Chris@1:  *                                                                  *
Chris@1:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
Chris@1:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
Chris@1:  *                                                                  *
Chris@1:  ********************************************************************
Chris@1: 
Chris@1:  function: utility functions for vorbis codec test suite.
Chris@1:  last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $
Chris@1: 
Chris@1:  ********************************************************************/
Chris@1: 
Chris@1: #include <stdio.h>
Chris@1: #include <stdlib.h>
Chris@1: #include <math.h>
Chris@1: #include <string.h>
Chris@1: #include <errno.h>
Chris@1: 
Chris@1: #include <vorbis/codec.h>
Chris@1: #include <vorbis/vorbisenc.h>
Chris@1: 
Chris@1: #include "write_read.h"
Chris@1: 
Chris@1: /* The following function is basically a hacked version of the code in
Chris@1:  * examples/encoder_example.c */
Chris@1: void
Chris@1: write_vorbis_data_or_die (const char *filename, int srate, float q, const float * data, int count, int ch)
Chris@1: {
Chris@1:   FILE * file ;
Chris@1:   ogg_stream_state os;
Chris@1:   ogg_page         og;
Chris@1:   ogg_packet       op;
Chris@1:   vorbis_info      vi;
Chris@1:   vorbis_comment   vc;
Chris@1:   vorbis_dsp_state vd;
Chris@1:   vorbis_block     vb;
Chris@1: 
Chris@1:   int eos = 0, ret;
Chris@1: 
Chris@1:   if ((file = fopen (filename, "wb")) == NULL) {
Chris@1:     printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
Chris@1:     exit (1) ;
Chris@1:   }
Chris@1: 
Chris@1:   /********** Encode setup ************/
Chris@1: 
Chris@1:   vorbis_info_init (&vi);
Chris@1: 
Chris@1:   ret = vorbis_encode_init_vbr (&vi,ch,srate,q);
Chris@1:   if (ret) {
Chris@1:     printf ("vorbis_encode_init_vbr return %d\n", ret) ;
Chris@1:     exit (1) ;
Chris@1:   }
Chris@1: 
Chris@1:   vorbis_comment_init (&vc);
Chris@1:   vorbis_comment_add_tag (&vc,"ENCODER","test/util.c");
Chris@1:   vorbis_analysis_init (&vd,&vi);
Chris@1:   vorbis_block_init (&vd,&vb);
Chris@1: 
Chris@1:   ogg_stream_init (&os,12345678);
Chris@1: 
Chris@1:   {
Chris@1:     ogg_packet header;
Chris@1:     ogg_packet header_comm;
Chris@1:     ogg_packet header_code;
Chris@1: 
Chris@1:     vorbis_analysis_headerout (&vd,&vc,&header,&header_comm,&header_code);
Chris@1:     ogg_stream_packetin (&os,&header);
Chris@1:     ogg_stream_packetin (&os,&header_comm);
Chris@1:     ogg_stream_packetin (&os,&header_code);
Chris@1: 
Chris@1:     /* Ensures the audio data will start on a new page. */
Chris@1:     while (!eos){
Chris@1:         int result = ogg_stream_flush (&os,&og);
Chris@1:         if (result == 0)
Chris@1:             break;
Chris@1:         fwrite (og.header,1,og.header_len,file);
Chris@1:         fwrite (og.body,1,og.body_len,file);
Chris@1:     }
Chris@1: 
Chris@1:   }
Chris@1: 
Chris@1:   {
Chris@1:     /* expose the buffer to submit data */
Chris@1:     float **buffer = vorbis_analysis_buffer (&vd,count);
Chris@1:     int i;
Chris@1: 
Chris@1:     for(i=0;i<ch;i++)
Chris@1:       memcpy (buffer [i], data, count * sizeof (float)) ;
Chris@1: 
Chris@1:     /* tell the library how much we actually submitted */
Chris@1:     vorbis_analysis_wrote (&vd,count);
Chris@1:     vorbis_analysis_wrote (&vd,0);
Chris@1:   }
Chris@1: 
Chris@1:   while (vorbis_analysis_blockout (&vd,&vb) == 1) {
Chris@1:     vorbis_analysis (&vb,NULL);
Chris@1:     vorbis_bitrate_addblock (&vb);
Chris@1: 
Chris@1:     while (vorbis_bitrate_flushpacket (&vd,&op)) {
Chris@1:       ogg_stream_packetin (&os,&op);
Chris@1: 
Chris@1:       while (!eos) {
Chris@1:           int result = ogg_stream_pageout (&os,&og);
Chris@1:           if (result == 0)
Chris@1:               break;
Chris@1:           fwrite (og.header,1,og.header_len,file);
Chris@1:           fwrite (og.body,1,og.body_len,file);
Chris@1: 
Chris@1:           if (ogg_page_eos (&og))
Chris@1:               eos = 1;
Chris@1:       }
Chris@1:     }
Chris@1:   }
Chris@1: 
Chris@1:   ogg_stream_clear (&os);
Chris@1:   vorbis_block_clear (&vb);
Chris@1:   vorbis_dsp_clear (&vd);
Chris@1:   vorbis_comment_clear (&vc);
Chris@1:   vorbis_info_clear (&vi);
Chris@1: 
Chris@1:  fclose (file) ;
Chris@1: }
Chris@1: 
Chris@1: /* The following function is basically a hacked version of the code in
Chris@1:  * examples/decoder_example.c */
Chris@1: void
Chris@1: read_vorbis_data_or_die (const char *filename, int srate, float * data, int count)
Chris@1: {
Chris@1:   ogg_sync_state   oy;
Chris@1:   ogg_stream_state os;
Chris@1:   ogg_page         og;
Chris@1:   ogg_packet       op;
Chris@1: 
Chris@1:   vorbis_info      vi;
Chris@1:   vorbis_comment   vc;
Chris@1:   vorbis_dsp_state vd;
Chris@1:   vorbis_block     vb;
Chris@1: 
Chris@1:   FILE *file;
Chris@1:   char *buffer;
Chris@1:   int  bytes;
Chris@1:   int eos = 0;
Chris@1:   int i;
Chris@1:   int read_total = 0 ;
Chris@1: 
Chris@1:   if ((file = fopen (filename, "rb")) == NULL) {
Chris@1:     printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
Chris@1:     exit (1) ;
Chris@1:   }
Chris@1: 
Chris@1:   ogg_sync_init (&oy);
Chris@1: 
Chris@1:   {
Chris@1:     /* fragile!  Assumes all of our headers will fit in the first 8kB,
Chris@1:        which currently they will */
Chris@1:     buffer = ogg_sync_buffer (&oy,8192);
Chris@1:     bytes = fread (buffer,1,8192,file);
Chris@1:     ogg_sync_wrote (&oy,bytes);
Chris@1: 
Chris@1:     if(ogg_sync_pageout (&oy,&og) != 1) {
Chris@1:       if(bytes < 8192) {
Chris@1:         printf ("Out of data.\n") ;
Chris@1:           goto done_decode ;
Chris@1:       }
Chris@1: 
Chris@1:       fprintf (stderr,"Input does not appear to be an Ogg bitstream.\n");
Chris@1:       exit (1);
Chris@1:     }
Chris@1: 
Chris@1:     ogg_stream_init (&os,ogg_page_serialno(&og));
Chris@1: 
Chris@1:     vorbis_info_init (&vi);
Chris@1:     vorbis_comment_init (&vc);
Chris@1:     if (ogg_stream_pagein (&os,&og) < 0) {
Chris@1:       fprintf (stderr,"Error reading first page of Ogg bitstream data.\n");
Chris@1:       exit (1);
Chris@1:     }
Chris@1: 
Chris@1:     if (ogg_stream_packetout(&os,&op) != 1) {
Chris@1:       fprintf (stderr,"Error reading initial header packet.\n");
Chris@1:       exit (1);
Chris@1:     }
Chris@1: 
Chris@1:     if (vorbis_synthesis_headerin (&vi,&vc,&op) < 0) {
Chris@1:       fprintf (stderr,"This Ogg bitstream does not contain Vorbis "
Chris@1:           "audio data.\n");
Chris@1:       exit (1);
Chris@1:     }
Chris@1: 
Chris@1:     i = 0;
Chris@1:     while ( i < 2) {
Chris@1:       while (i < 2) {
Chris@1: 
Chris@1:         int result = ogg_sync_pageout (&oy,&og);
Chris@1:         if(result == 0)
Chris@1:           break;
Chris@1:         if(result==1) {
Chris@1:           ogg_stream_pagein(&os,&og);
Chris@1: 
Chris@1:           while (i < 2) {
Chris@1:             result = ogg_stream_packetout (&os,&op);
Chris@1:             if (result == 0) break;
Chris@1:             if (result < 0) {
Chris@1:               fprintf (stderr,"Corrupt secondary header.  Exiting.\n");
Chris@1:               exit(1);
Chris@1:             }
Chris@1:             vorbis_synthesis_headerin (&vi,&vc,&op);
Chris@1:             i++;
Chris@1:           }
Chris@1:         }
Chris@1:       }
Chris@1: 
Chris@1:       buffer = ogg_sync_buffer (&oy,4096);
Chris@1:       bytes = fread (buffer,1,4096,file);
Chris@1:       if (bytes == 0 && i < 2) {
Chris@1:         fprintf (stderr,"End of file before finding all Vorbis headers!\n");
Chris@1:         exit (1);
Chris@1:       }
Chris@1: 
Chris@1:       ogg_sync_wrote (&oy,bytes);
Chris@1:     }
Chris@1: 
Chris@1:     if (vi.rate != srate) {
Chris@1:       printf ("\n\nError : File '%s' has sample rate of %ld when it should be %d.\n\n", filename, vi.rate, srate);
Chris@1:       exit (1) ;
Chris@1:     }
Chris@1: 
Chris@1:     vorbis_synthesis_init (&vd,&vi);
Chris@1:     vorbis_block_init (&vd,&vb);
Chris@1: 
Chris@1:     while(!eos) {
Chris@1:       while (!eos) {
Chris@1:         int result = ogg_sync_pageout (&oy,&og);
Chris@1:         if (result == 0)
Chris@1:           break;
Chris@1:         if (result < 0) {
Chris@1:           fprintf (stderr,"Corrupt or missing data in bitstream; "
Chris@1:                    "continuing...\n");
Chris@1:         } else {
Chris@1:           ogg_stream_pagein (&os,&og);
Chris@1:           while (1) {
Chris@1:             result = ogg_stream_packetout (&os,&op);
Chris@1: 
Chris@1:             if (result == 0)
Chris@1:               break;
Chris@1:             if (result < 0) {
Chris@1:               /* no reason to complain; already complained above */
Chris@1:             } else {
Chris@1:               float **pcm;
Chris@1:               int samples;
Chris@1: 
Chris@1:               if (vorbis_synthesis (&vb,&op) == 0)
Chris@1:                 vorbis_synthesis_blockin(&vd,&vb);
Chris@1:               while ((samples = vorbis_synthesis_pcmout (&vd,&pcm)) > 0 && read_total < count) {
Chris@1:                 int bout = samples < count ? samples : count;
Chris@1:                 bout = read_total + bout > count ? count - read_total : bout;
Chris@1: 
Chris@1:                 memcpy (data + read_total, pcm[0], bout * sizeof (float)) ;
Chris@1: 
Chris@1:                 vorbis_synthesis_read (&vd,bout);
Chris@1:                 read_total += bout ;
Chris@1:               }
Chris@1:             }
Chris@1:           }
Chris@1: 
Chris@1:           if (ogg_page_eos (&og)) eos = 1;
Chris@1:         }
Chris@1:       }
Chris@1: 
Chris@1:       if (!eos) {
Chris@1:         buffer = ogg_sync_buffer (&oy,4096);
Chris@1:         bytes = fread (buffer,1,4096,file);
Chris@1:         ogg_sync_wrote (&oy,bytes);
Chris@1:         if (bytes == 0) eos = 1;
Chris@1:       }
Chris@1:     }
Chris@1: 
Chris@1:     ogg_stream_clear (&os);
Chris@1: 
Chris@1:     vorbis_block_clear (&vb);
Chris@1:     vorbis_dsp_clear (&vd);
Chris@1:     vorbis_comment_clear (&vc);
Chris@1:     vorbis_info_clear (&vi);
Chris@1:   }
Chris@1: done_decode:
Chris@1: 
Chris@1:   /* OK, clean up the framer */
Chris@1:   ogg_sync_clear (&oy);
Chris@1: 
Chris@1:   fclose (file) ;
Chris@1: }
Chris@1: