summaryrefslogtreecommitdiffhomepage
path: root/contrib/vorbis/test/write_read.c
blob: f1190dc60e2402154744e3b9cb29cbdaff036aa8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
 * by the Xiph.Org Foundation http://www.xiph.org/                  *
 *                                                                  *
 ********************************************************************

 function: utility functions for vorbis codec test suite.

 ********************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>

#include <vorbis/codec.h>
#include <vorbis/vorbisenc.h>

#include "write_read.h"

/* The following function is basically a hacked version of the code in
 * examples/encoder_example.c */
void
write_vorbis_data_or_die (const char *filename, int srate, float q, const float * data, int count, int ch)
{
  FILE * file ;
  ogg_stream_state os;
  ogg_page         og;
  ogg_packet       op;
  vorbis_info      vi;
  vorbis_comment   vc;
  vorbis_dsp_state vd;
  vorbis_block     vb;

  int eos = 0, ret;

  if ((file = fopen (filename, "wb")) == NULL) {
    printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
    exit (1) ;
  }

  /********** Encode setup ************/

  vorbis_info_init (&vi);

  ret = vorbis_encode_init_vbr (&vi,ch,srate,q);
  if (ret) {
    printf ("vorbis_encode_init_vbr return %d\n", ret) ;
    exit (1) ;
  }

  vorbis_comment_init (&vc);
  vorbis_comment_add_tag (&vc,"ENCODER","test/util.c");
  vorbis_analysis_init (&vd,&vi);
  vorbis_block_init (&vd,&vb);

  ogg_stream_init (&os,12345678);

  {
    ogg_packet header;
    ogg_packet header_comm;
    ogg_packet header_code;

    vorbis_analysis_headerout (&vd,&vc,&header,&header_comm,&header_code);
    ogg_stream_packetin (&os,&header);
    ogg_stream_packetin (&os,&header_comm);
    ogg_stream_packetin (&os,&header_code);

    /* Ensures the audio data will start on a new page. */
    while (!eos){
        int result = ogg_stream_flush (&os,&og);
        if (result == 0)
            break;
        fwrite (og.header,1,og.header_len,file);
        fwrite (og.body,1,og.body_len,file);
    }

  }

  {
    /* expose the buffer to submit data */
    float **buffer = vorbis_analysis_buffer (&vd,count);
    int i;

    for(i=0;i<ch;i++)
      memcpy (buffer [i], data, count * sizeof (float)) ;

    /* tell the library how much we actually submitted */
    vorbis_analysis_wrote (&vd,count);
    vorbis_analysis_wrote (&vd,0);
  }

  while (vorbis_analysis_blockout (&vd,&vb) == 1) {
    vorbis_analysis (&vb,NULL);
    vorbis_bitrate_addblock (&vb);

    while (vorbis_bitrate_flushpacket (&vd,&op)) {
      ogg_stream_packetin (&os,&op);

      while (!eos) {
          int result = ogg_stream_pageout (&os,&og);
          if (result == 0)
              break;
          fwrite (og.header,1,og.header_len,file);
          fwrite (og.body,1,og.body_len,file);

          if (ogg_page_eos (&og))
              eos = 1;
      }
    }
  }

  ogg_stream_clear (&os);
  vorbis_block_clear (&vb);
  vorbis_dsp_clear (&vd);
  vorbis_comment_clear (&vc);
  vorbis_info_clear (&vi);

 fclose (file) ;
}

/* The following function is basically a hacked version of the code in
 * examples/decoder_example.c */
void
read_vorbis_data_or_die (const char *filename, int srate, float * data, int count)
{
  ogg_sync_state   oy;
  ogg_stream_state os;
  ogg_page         og;
  ogg_packet       op;

  vorbis_info      vi;
  vorbis_comment   vc;
  vorbis_dsp_state vd;
  vorbis_block     vb;

  FILE *file;
  char *buffer;
  int  bytes;
  int eos = 0;
  int i;
  int read_total = 0 ;

  if ((file = fopen (filename, "rb")) == NULL) {
    printf("\n\nError : fopen failed : %s\n", strerror (errno)) ;
    exit (1) ;
  }

  ogg_sync_init (&oy);

  {
    /* fragile!  Assumes all of our headers will fit in the first 8kB,
       which currently they will */
    buffer = ogg_sync_buffer (&oy,8192);
    bytes = fread (buffer,1,8192,file);
    ogg_sync_wrote (&oy,bytes);

    if(ogg_sync_pageout (&oy,&og) != 1) {
      if(bytes < 8192) {
        printf ("Out of data.\n") ;
          goto done_decode ;
      }

      fprintf (stderr,"Input does not appear to be an Ogg bitstream.\n");
      exit (1);
    }

    ogg_stream_init (&os,ogg_page_serialno(&og));

    vorbis_info_init (&vi);
    vorbis_comment_init (&vc);
    if (ogg_stream_pagein (&os,&og) < 0) {
      fprintf (stderr,"Error reading first page of Ogg bitstream data.\n");
      exit (1);
    }

    if (ogg_stream_packetout(&os,&op) != 1) {
      fprintf (stderr,"Error reading initial header packet.\n");
      exit (1);
    }

    if (vorbis_synthesis_headerin (&vi,&vc,&op) < 0) {
      fprintf (stderr,"This Ogg bitstream does not contain Vorbis "
          "audio data.\n");
      exit (1);
    }

    i = 0;
    while ( i < 2) {
      while (i < 2) {

        int result = ogg_sync_pageout (&oy,&og);
        if(result == 0)
          break;
        if(result==1) {
          ogg_stream_pagein(&os,&og);

          while (i < 2) {
            result = ogg_stream_packetout (&os,&op);
            if (result == 0) break;
            if (result < 0) {
              fprintf (stderr,"Corrupt secondary header.  Exiting.\n");
              exit(1);
            }
            vorbis_synthesis_headerin (&vi,&vc,&op);
            i++;
          }
        }
      }

      buffer = ogg_sync_buffer (&oy,4096);
      bytes = fread (buffer,1,4096,file);
      if (bytes == 0 && i < 2) {
        fprintf (stderr,"End of file before finding all Vorbis headers!\n");
        exit (1);
      }

      ogg_sync_wrote (&oy,bytes);
    }

    if (vi.rate != srate) {
      printf ("\n\nError : File '%s' has sample rate of %ld when it should be %d.\n\n", filename, vi.rate, srate);
      exit (1) ;
    }

    vorbis_synthesis_init (&vd,&vi);
    vorbis_block_init (&vd,&vb);

    while(!eos) {
      while (!eos) {
        int result = ogg_sync_pageout (&oy,&og);
        if (result == 0)
          break;
        if (result < 0) {
          fprintf (stderr,"Corrupt or missing data in bitstream; "
                   "continuing...\n");
        } else {
          ogg_stream_pagein (&os,&og);
          while (1) {
            result = ogg_stream_packetout (&os,&op);

            if (result == 0)
              break;
            if (result < 0) {
              /* no reason to complain; already complained above */
            } else {
              float **pcm;
              int samples;

              if (vorbis_synthesis (&vb,&op) == 0)
                vorbis_synthesis_blockin(&vd,&vb);
              while ((samples = vorbis_synthesis_pcmout (&vd,&pcm)) > 0 && read_total < count) {
                int bout = samples < count ? samples : count;
                bout = read_total + bout > count ? count - read_total : bout;

                memcpy (data + read_total, pcm[0], bout * sizeof (float)) ;

                vorbis_synthesis_read (&vd,bout);
                read_total += bout ;
              }
            }
          }

          if (ogg_page_eos (&og)) eos = 1;
        }
      }

      if (!eos) {
        buffer = ogg_sync_buffer (&oy,4096);
        bytes = fread (buffer,1,4096,file);
        ogg_sync_wrote (&oy,bytes);
        if (bytes == 0) eos = 1;
      }
    }

    ogg_stream_clear (&os);

    vorbis_block_clear (&vb);
    vorbis_dsp_clear (&vd);
    vorbis_comment_clear (&vc);
    vorbis_info_clear (&vi);
  }
done_decode:

  /* OK, clean up the framer */
  ogg_sync_clear (&oy);

  fclose (file) ;
}