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r663: This commit was generated by cvs2svn to compensate for changes in r662,
[cinelerra_cv.git] / libsndfile / src / au.c
blob7d6ce02ab9cbe97488d03af7ba50337076a58f6f
1 /*
2 ** Copyright (C) 1999-2003 Erik de Castro Lopo <erikd@zip.com.au>
3 **
4 ** This program is free software; you can redistribute it and/or modify
5 ** it under the terms of the GNU Lesser General Public License as published by
6 ** the Free Software Foundation; either version 2.1 of the License, or
7 ** (at your option) any later version.
8 **
9 ** This program is distributed in the hope that it will be useful,
10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ** GNU Lesser General Public License for more details.
13 **
14 ** You should have received a copy of the GNU Lesser General Public License
15 ** along with this program; if not, write to the Free Software
16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #include <stdio.h>
20 #include <unistd.h>
21 #include <fcntl.h>
22 #include <string.h>
23 #include <ctype.h>
24
25 #include "sndfile.h"
26 #include "config.h"
27 #include "sfendian.h"
28 #include "common.h"
29 #include "au.h"
30
31 /*------------------------------------------------------------------------------
32 ** Macros to handle big/little endian issues.
33 */
34
35 #define DOTSND_MARKER (MAKE_MARKER ('.', 's', 'n', 'd'))
36 #define DNSDOT_MARKER (MAKE_MARKER ('d', 'n', 's', '.'))
37
38 #define AU_DATA_OFFSET 24
39
40 /*------------------------------------------------------------------------------
41 ** Known AU file encoding types.
42 */
43
44 enum
45 { AU_ENCODING_ULAW_8 = 1, /* 8-bit u-law samples */
46 AU_ENCODING_PCM_8 = 2, /* 8-bit linear samples */
47 AU_ENCODING_PCM_16 = 3, /* 16-bit linear samples */
48 AU_ENCODING_PCM_24 = 4, /* 24-bit linear samples */
49 AU_ENCODING_PCM_32 = 5, /* 32-bit linear samples */
50
51 AU_ENCODING_FLOAT = 6, /* floating-point samples */
52 AU_ENCODING_DOUBLE = 7, /* double-precision float samples */
53 AU_ENCODING_INDIRECT = 8, /* fragmented sampled data */
54 AU_ENCODING_NESTED = 9, /* ? */
55 AU_ENCODING_DSP_CORE = 10, /* DSP program */
56 AU_ENCODING_DSP_DATA_8 = 11, /* 8-bit fixed-point samples */
57 AU_ENCODING_DSP_DATA_16 = 12, /* 16-bit fixed-point samples */
58 AU_ENCODING_DSP_DATA_24 = 13, /* 24-bit fixed-point samples */
59 AU_ENCODING_DSP_DATA_32 = 14, /* 32-bit fixed-point samples */
60
61 AU_ENCODING_DISPLAY = 16, /* non-audio display data */
62 AU_ENCODING_MULAW_SQUELCH = 17, /* ? */
63 AU_ENCODING_EMPHASIZED = 18, /* 16-bit linear with emphasis */
64 AU_ENCODING_NEXT = 19, /* 16-bit linear with compression (NEXT) */
65 AU_ENCODING_COMPRESSED_EMPHASIZED = 20, /* A combination of the two above */
66 AU_ENCODING_DSP_COMMANDS = 21, /* Music Kit DSP commands */
67 AU_ENCODING_DSP_COMMANDS_SAMPLES = 22, /* ? */
68
69 AU_ENCODING_ADPCM_G721_32 = 23, /* G721 32 kbs ADPCM - 4 bits per sample. */
70 AU_ENCODING_ADPCM_G722 = 24, /* G722 64 kbs ADPCM */
71 AU_ENCODING_ADPCM_G723_24 = 25, /* G723 24 kbs ADPCM - 3 bits per sample. */
72 AU_ENCODING_ADPCM_G723_40 = 26, /* G723 40 kbs ADPCM - 5 bits per sample. */
73
74 AU_ENCODING_ALAW_8 = 27
75 } ;
76
77 /*------------------------------------------------------------------------------
78 ** Typedefs.
79 */
80
81 typedef struct
82 { int dataoffset ;
83 int datasize ;
84 int encoding ;
85 int samplerate ;
86 int channels ;
87 } AU_FMT ;
88
89
90 /*------------------------------------------------------------------------------
91 ** Private static functions.
92 */
93
94 static int au_close (SF_PRIVATE *psf) ;
95
96 static int au_format_to_encoding (int format) ;
97
98 static int au_write_header (SF_PRIVATE *psf, int calc_length) ;
99 static int au_read_header (SF_PRIVATE *psf) ;
100
101 /*------------------------------------------------------------------------------
102 ** Public function.
103 */
104
105 int
106 au_open (SF_PRIVATE *psf)
107 { int subformat ;
108 int error = 0 ;
109
110 if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
111 { if ((error = au_read_header (psf)))
112 return error ;
113 } ;
114
115 if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_AU)
116 return SFE_BAD_OPEN_FORMAT ;
117
118 subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
119
120 if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
121 { psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ;
122 if (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU)
123 psf->endian = SF_ENDIAN_LITTLE ;
124 else if (psf->endian != SF_ENDIAN_LITTLE)
125 psf->endian = SF_ENDIAN_BIG ;
126
127 if (au_write_header (psf, SF_FALSE))
128 return psf->error ;
129
130 psf->write_header = au_write_header ;
131 } ;
132
133 psf->close = au_close ;
134
135 psf->blockwidth = psf->bytewidth * psf->sf.channels ;
136
137 switch (subformat)
138 { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
139 ulaw_init (psf) ;
140 break ;
141
142 case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */
143 error = pcm_init (psf) ;
144 break ;
145
146 case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
147 case SF_FORMAT_PCM_24 : /* 24-bit linear PCM */
148 case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
149 error = pcm_init (psf) ;
150 break ;
151
152 case SF_FORMAT_FLOAT : /* 32-bit floats. */
153 error = float32_init (psf) ;
154 break ;
155
156 case SF_FORMAT_DOUBLE : /* 64-bit double precision floats. */
157 error = double64_init (psf) ;
158 break ;
159
160 case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
161 alaw_init (psf) ;
162 break ;
163
164 case SF_FORMAT_G721_32 :
165 if (psf->mode == SFM_READ)
166 error = au_g72x_reader_init (psf, AU_H_G721_32) ;
167 else if (psf->mode == SFM_WRITE)
168 error = au_g72x_writer_init (psf, AU_H_G721_32) ;
169 psf->sf.seekable = SF_FALSE ;
170 break ;
171
172 case SF_FORMAT_G723_24 :
173 if (psf->mode == SFM_READ)
174 error = au_g72x_reader_init (psf, AU_H_G723_24) ;
175 else if (psf->mode == SFM_WRITE)
176 error = au_g72x_writer_init (psf, AU_H_G723_24) ;
177 psf->sf.seekable = SF_FALSE ;
178 break ;
179
180 case SF_FORMAT_G723_40 :
181 if (psf->mode == SFM_READ)
182 error = au_g72x_reader_init (psf, AU_H_G723_40) ;
183 else if (psf->mode == SFM_WRITE)
184 error = au_g72x_writer_init (psf, AU_H_G723_40) ;
185 psf->sf.seekable = SF_FALSE ;
186 break ;
187
188 default : break ;
189 } ;
190
191 return error ;
192 } /* au_open */
193
194 int
195 au_nh_open (SF_PRIVATE *psf)
196 {
197 if (psf->mode == SFM_RDWR)
198 return SFE_BAD_OPEN_FORMAT ;
199
200 if (psf_fseek (psf, psf->dataoffset, SEEK_SET))
201 return SFE_BAD_SEEK ;
202
203 psf_log_printf (psf, "Header-less u-law encoded file.\n") ;
204 psf_log_printf (psf, "Setting up for 8kHz, mono, u-law.\n") ;
205
206 psf->sf.format = SF_FORMAT_AU | SF_FORMAT_ULAW ;
207
208 psf->dataoffset = 0 ;
209 psf->endian = 0 ; /* Irrelevant but it must be something. */
210 psf->sf.samplerate = 8000 ;
211 psf->sf.channels = 1 ;
212 psf->bytewidth = 1 ; /* Before decoding */
213
214 ulaw_init (psf) ;
215
216 psf->close = au_close ;
217
218 psf->blockwidth = 1 ;
219 psf->sf.frames = psf->filelength ;
220 psf->datalength = psf->filelength - AU_DATA_OFFSET ;
221
222 return 0 ;
223 } /* au_nh_open */
224
225 /*------------------------------------------------------------------------------
226 */
227
228 static int
229 au_close (SF_PRIVATE *psf)
230 {
231 if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
232 au_write_header (psf, SF_TRUE) ;
233
234 return 0 ;
235 } /* au_close */
236
237 static int
238 au_write_header (SF_PRIVATE *psf, int calc_length)
239 { sf_count_t current ;
240 int encoding ;
241
242 current = psf_ftell (psf) ;
243
244 if (calc_length)
245 { psf->filelength = psf_get_filelen (psf) ;
246
247 psf->datalength = psf->filelength - psf->dataoffset ;
248 if (psf->dataend)
249 psf->datalength -= psf->filelength - psf->dataend ;
250
251 psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
252 } ;
253
254 encoding = au_format_to_encoding (psf->sf.format & SF_FORMAT_SUBMASK) ;
255 if (! encoding)
256 return (psf->error = SFE_BAD_OPEN_FORMAT) ;
257
258 /* Reset the current header length to zero. */
259 psf->header [0] = 0 ;
260 psf->headindex = 0 ;
261 psf_fseek (psf, 0, SEEK_SET) ;
262
263 if (psf->endian == SF_ENDIAN_BIG)
264 { psf_binheader_writef (psf, "Em4", DOTSND_MARKER, AU_DATA_OFFSET) ;
265 psf_binheader_writef (psf, "Et8444", psf->datalength, encoding, psf->sf.samplerate, psf->sf.channels) ;
266 }
267 else if (psf->endian == SF_ENDIAN_LITTLE)
268 { psf_binheader_writef (psf, "em4", DNSDOT_MARKER, AU_DATA_OFFSET) ;
269 psf_binheader_writef (psf, "et8444", psf->datalength, encoding, psf->sf.samplerate, psf->sf.channels) ;
270 }
271 else
272 return (psf->error = SFE_BAD_OPEN_FORMAT) ;
273
274 /* Header construction complete so write it out. */
275 psf_fwrite (psf->header, psf->headindex, 1, psf) ;
276
277 if (psf->error)
278 return psf->error ;
279
280 psf->dataoffset = psf->headindex ;
281
282 if (current > 0)
283 psf_fseek (psf, current, SEEK_SET) ;
284
285 return psf->error ;
286 } /* au_write_header */
287
288 static int
289 au_format_to_encoding (int format)
290 {
291 switch (format)
292 { case SF_FORMAT_PCM_S8 : return AU_ENCODING_PCM_8 ;
293 case SF_FORMAT_PCM_16 : return AU_ENCODING_PCM_16 ;
294 case SF_FORMAT_PCM_24 : return AU_ENCODING_PCM_24 ;
295 case SF_FORMAT_PCM_32 : return AU_ENCODING_PCM_32 ;
296
297 case SF_FORMAT_FLOAT : return AU_ENCODING_FLOAT ;
298 case SF_FORMAT_DOUBLE : return AU_ENCODING_DOUBLE ;
299
300 case SF_FORMAT_ULAW : return AU_ENCODING_ULAW_8 ;
301 case SF_FORMAT_ALAW : return AU_ENCODING_ALAW_8 ;
302
303 case SF_FORMAT_G721_32 : return AU_ENCODING_ADPCM_G721_32 ;
304 case SF_FORMAT_G723_24 : return AU_ENCODING_ADPCM_G723_24 ;
305 case SF_FORMAT_G723_40 : return AU_ENCODING_ADPCM_G723_40 ;
306
307 default : break ;
308 } ;
309 return 0 ;
310 } /* au_format_to_encoding */
311
312 static int
313 au_read_header (SF_PRIVATE *psf)
314 { AU_FMT au_fmt ;
315 int marker, dword ;
316
317 psf_binheader_readf (psf, "pm", 0, &marker) ;
318 psf_log_printf (psf, "%M\n", marker) ;
319
320 if (marker == DOTSND_MARKER)
321 { psf->endian = SF_ENDIAN_BIG ;
322
323 psf_binheader_readf (psf, "E44444", &(au_fmt.dataoffset), &(au_fmt.datasize),
324 &(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ;
325 }
326 else if (marker == DNSDOT_MARKER)
327 { psf->endian = SF_ENDIAN_LITTLE ;
328 psf_binheader_readf (psf, "e44444", &(au_fmt.dataoffset), &(au_fmt.datasize),
329 &(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ;
330 }
331 else
332 return SFE_AU_NO_DOTSND ;
333
334
335 psf_log_printf (psf, " Data Offset : %d\n", au_fmt.dataoffset) ;
336
337 if (psf->fileoffset > 0 && au_fmt.datasize == -1)
338 { psf_log_printf (psf, " Data Size : -1\n") ;
339 return SFE_AU_EMBED_BAD_LEN ;
340 } ;
341
342 if (psf->fileoffset > 0)
343 { psf->filelength = au_fmt.dataoffset + au_fmt.datasize ;
344 psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
345 }
346 else if (au_fmt.datasize == -1 || au_fmt.dataoffset + au_fmt.datasize == psf->filelength)
347 psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
348 else if (au_fmt.dataoffset + au_fmt.datasize < psf->filelength)
349 { psf->filelength = au_fmt.dataoffset + au_fmt.datasize ;
350 psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ;
351 }
352 else
353 { dword = psf->filelength - au_fmt.dataoffset ;
354 psf_log_printf (psf, " Data Size : %d (should be %d)\n", au_fmt.datasize, dword) ;
355 au_fmt.datasize = dword ;
356 } ;
357
358 psf->dataoffset = au_fmt.dataoffset ;
359 psf->datalength = psf->filelength - psf->dataoffset ;
360
361 if (psf_fseek (psf, psf->dataoffset, SEEK_SET) != psf->dataoffset)
362 return SFE_BAD_SEEK ;
363
364 psf->close = au_close ;
365
366 psf->sf.samplerate = au_fmt.samplerate ;
367 psf->sf.channels = au_fmt.channels ;
368
369 /* Only fill in type major. */
370 if (psf->endian == SF_ENDIAN_BIG)
371 psf->sf.format = SF_FORMAT_AU ;
372 else if (psf->endian == SF_ENDIAN_LITTLE)
373 psf->sf.format = SF_ENDIAN_LITTLE | SF_FORMAT_AU ;
374
375 psf_log_printf (psf, " Encoding : %d => ", au_fmt.encoding) ;
376
377 psf->sf.format = psf->sf.format & SF_FORMAT_ENDMASK ;
378
379 switch (au_fmt.encoding)
380 { case AU_ENCODING_ULAW_8 :
381 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ULAW ;
382 psf->bytewidth = 1 ; /* Before decoding */
383 psf_log_printf (psf, "8-bit ISDN u-law\n") ;
384 break ;
385
386 case AU_ENCODING_PCM_8 :
387 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_S8 ;
388 psf->bytewidth = 1 ;
389 psf_log_printf (psf, "8-bit linear PCM\n") ;
390 break ;
391
392 case AU_ENCODING_PCM_16 :
393 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_16 ;
394 psf->bytewidth = 2 ;
395 psf_log_printf (psf, "16-bit linear PCM\n") ;
396 break ;
397
398 case AU_ENCODING_PCM_24 :
399 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_24 ;
400 psf->bytewidth = 3 ;
401 psf_log_printf (psf, "24-bit linear PCM\n") ;
402 break ;
403
404 case AU_ENCODING_PCM_32 :
405 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_32 ;
406 psf->bytewidth = 4 ;
407 psf_log_printf (psf, "32-bit linear PCM\n") ;
408 break ;
409
410 case AU_ENCODING_FLOAT :
411 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_FLOAT ;
412 psf->bytewidth = 4 ;
413 psf_log_printf (psf, "32-bit float\n") ;
414 break ;
415
416 case AU_ENCODING_DOUBLE :
417 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_DOUBLE ;
418 psf->bytewidth = 8 ;
419 psf_log_printf (psf, "64-bit double precision float\n") ;
420 break ;
421
422 case AU_ENCODING_ALAW_8 :
423 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ALAW ;
424 psf->bytewidth = 1 ; /* Before decoding */
425 psf_log_printf (psf, "8-bit ISDN A-law\n") ;
426 break ;
427
428 case AU_ENCODING_ADPCM_G721_32 :
429 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G721_32 ;
430 psf->bytewidth = 0 ;
431 psf_log_printf (psf, "G721 32kbs ADPCM\n") ;
432 break ;
433
434 case AU_ENCODING_ADPCM_G723_24 :
435 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_24 ;
436 psf->bytewidth = 0 ;
437 psf_log_printf (psf, "G723 24kbs ADPCM\n") ;
438 break ;
439
440 case AU_ENCODING_ADPCM_G723_40 :
441 psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_40 ;
442 psf->bytewidth = 0 ;
443 psf_log_printf (psf, "G723 40kbs ADPCM\n") ;
444 break ;
445
446 case AU_ENCODING_ADPCM_G722 :
447 psf_log_printf (psf, "G722 64 kbs ADPCM (unsupported)\n") ;
448 break ;
449
450 case AU_ENCODING_NEXT :
451 psf_log_printf (psf, "Weird NeXT encoding format (unsupported)\n") ;
452 break ;
453
454 default :
455 psf_log_printf (psf, "Unknown!!\n") ;
456 break ;
457 } ;
458
459 psf_log_printf (psf, " Sample Rate : %d\n", au_fmt.samplerate) ;
460 psf_log_printf (psf, " Channels : %d\n", au_fmt.channels) ;
461
462 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
463
464 if (! psf->sf.frames && psf->blockwidth)
465 psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
466
467 return 0 ;
468 } /* au_read_header */
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