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mp3: fix error handling in rewrite_tags()
[sox.git] / src / formats.c
blob3fcf4382b69ce06aa52c2348a6bb4fb3325a3762
1 /* Implements the public API for using libSoX file formats.
2 * All public functions & data are prefixed with sox_ .
3 *
4 * (c) 2005-8 Chris Bagwell and SoX contributors
5 *
6 * This library is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; either version 2.1 of the License, or (at
9 * your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this library; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #define _GNU_SOURCE
22 #include "sox_i.h"
23
24 #include <assert.h>
25 #include <ctype.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/stat.h>
31 #include <sys/types.h>
32
33 #ifdef HAVE_IO_H
34 #include <io.h>
35 #endif
36
37 #if HAVE_MAGIC
38 #include <magic.h>
39 #endif
40
41 #ifdef HAVE_UNISTD_H
42 # include <unistd.h>
43 #endif
44
45 #define PIPE_AUTO_DETECT_SIZE 256 /* Only as much as we can rewind a pipe */
46 #define AUTO_DETECT_SIZE 4096 /* For seekable file, so no restriction */
47
48 static char const * auto_detect_format(sox_format_t * ft, char const * ext)
49 {
50 char data[AUTO_DETECT_SIZE];
51 size_t len = lsx_readbuf(ft, data, ft->seekable? sizeof(data) : PIPE_AUTO_DETECT_SIZE);
52 #define CHECK(type, p2, l2, d2, p1, l1, d1) if (len >= p1 + l1 && \
53 !memcmp(data + p1, d1, (size_t)l1) && !memcmp(data + p2, d2, (size_t)l2)) return #type;
54 CHECK(voc , 0, 0, "" , 0, 20, "Creative Voice File\x1a")
55 CHECK(smp , 0, 0, "" , 0, 17, "SOUND SAMPLE DATA")
56 CHECK(wve , 0, 0, "" , 0, 15, "ALawSoundFile**")
57 CHECK(gsrt , 0, 0, "" , 16, 9, "ring.bin")
58 CHECK(amr-wb, 0, 0, "" , 0, 9, "#!AMR-WB\n")
59 CHECK(prc , 0, 0, "" , 0, 8, "\x37\x00\x00\x10\x6d\x00\x00\x10")
60 CHECK(sph , 0, 0, "" , 0, 7, "NIST_1A")
61 CHECK(amr-nb, 0, 0, "" , 0, 6, "#!AMR\n")
62 CHECK(txw , 0, 0, "" , 0, 6, "LM8953")
63 CHECK(sndt , 0, 0, "" , 0, 6, "SOUND\x1a")
64 CHECK(vorbis, 0, 4, "OggS" , 29, 6, "vorbis")
65 CHECK(opus , 0, 4, "OggS" , 28, 8, "OpusHead")
66 CHECK(speex , 0, 4, "OggS" , 28, 6, "Speex")
67 CHECK(hcom ,65, 4, "FSSD" , 128,4, "HCOM")
68 CHECK(wav , 0, 4, "RIFF" , 8, 4, "WAVE")
69 CHECK(wav , 0, 4, "RIFX" , 8, 4, "WAVE")
70 CHECK(wav , 0, 4, "RF64" , 8, 4, "WAVE")
71 CHECK(aiff , 0, 4, "FORM" , 8, 4, "AIFF")
72 CHECK(aifc , 0, 4, "FORM" , 8, 4, "AIFC")
73 CHECK(8svx , 0, 4, "FORM" , 8, 4, "8SVX")
74 CHECK(maud , 0, 4, "FORM" , 8, 4, "MAUD")
75 CHECK(xa , 0, 0, "" , 0, 4, "XA\0\0")
76 CHECK(xa , 0, 0, "" , 0, 4, "XAI\0")
77 CHECK(xa , 0, 0, "" , 0, 4, "XAJ\0")
78 CHECK(au , 0, 0, "" , 0, 4, ".snd")
79 CHECK(au , 0, 0, "" , 0, 4, "dns.")
80 CHECK(au , 0, 0, "" , 0, 4, "\0ds.")
81 CHECK(au , 0, 0, "" , 0, 4, ".sd\0")
82 CHECK(flac , 0, 0, "" , 0, 4, "fLaC")
83 CHECK(avr , 0, 0, "" , 0, 4, "2BIT")
84 CHECK(caf , 0, 0, "" , 0, 4, "caff")
85 CHECK(wv , 0, 0, "" , 0, 4, "wvpk")
86 CHECK(paf , 0, 0, "" , 0, 4, " paf")
87 CHECK(sf , 0, 0, "" , 0, 4, "\144\243\001\0")
88 CHECK(sf , 0, 0, "" , 0, 4, "\0\001\243\144")
89 CHECK(sf , 0, 0, "" , 0, 4, "\144\243\002\0")
90 CHECK(sf , 0, 0, "" , 0, 4, "\0\002\243\144")
91 CHECK(sf , 0, 0, "" , 0, 4, "\144\243\003\0")
92 CHECK(sf , 0, 0, "" , 0, 4, "\0\003\243\144")
93 CHECK(sf , 0, 0, "" , 0, 4, "\144\243\004\0")
94 CHECK(sox , 0, 0, "" , 0, 4, ".SoX")
95 CHECK(sox , 0, 0, "" , 0, 4, "XoS.")
96
97 if (ext && !strcasecmp(ext, "snd"))
98 CHECK(sndr , 7, 1, "" , 0, 2, "\0")
99 #undef CHECK
100
101 #if HAVE_MAGIC
102 if (sox_globals.use_magic) {
103 static magic_t magic;
104 char const * filetype = NULL;
105 if (!magic) {
106 magic = magic_open(MAGIC_MIME | MAGIC_SYMLINK);
107 if (magic)
108 magic_load(magic, NULL);
109 }
110 if (magic)
111 filetype = magic_buffer(magic, data, len);
112 if (filetype && strncmp(filetype, "application/octet-stream", (size_t)24) &&
113 !lsx_strends(filetype, "/unknown") &&
114 strncmp(filetype, "text/plain", (size_t)10) )
115 return filetype;
116 else if (filetype)
117 lsx_debug("libmagic detected %s", filetype);
118 }
119 #endif
120 return NULL;
121 }
122
123 static sox_encodings_info_t const s_sox_encodings_info[] = {
124 {sox_encodings_none , "n/a" , "Unknown or not applicable"},
125 {sox_encodings_none , "Signed PCM" , "Signed Integer PCM"},
126 {sox_encodings_none , "Unsigned PCM" , "Unsigned Integer PCM"},
127 {sox_encodings_none , "F.P. PCM" , "Floating Point PCM"},
128 {sox_encodings_none , "F.P. PCM" , "Floating Point (text) PCM"},
129 {sox_encodings_none , "FLAC" , "FLAC"},
130 {sox_encodings_none , "HCOM" , "HCOM"},
131 {sox_encodings_none , "WavPack" , "WavPack"},
132 {sox_encodings_none , "F.P. WavPack" , "Floating Point WavPack"},
133 {sox_encodings_lossy1, "u-law" , "u-law"},
134 {sox_encodings_lossy1, "A-law" , "A-law"},
135 {sox_encodings_lossy1, "G.721 ADPCM" , "G.721 ADPCM"},
136 {sox_encodings_lossy1, "G.723 ADPCM" , "G.723 ADPCM"},
137 {sox_encodings_lossy1, "CL ADPCM (8)" , "CL ADPCM (from 8-bit)"},
138 {sox_encodings_lossy1, "CL ADPCM (16)", "CL ADPCM (from 16-bit)"},
139 {sox_encodings_lossy1, "MS ADPCM" , "MS ADPCM"},
140 {sox_encodings_lossy1, "IMA ADPCM" , "IMA ADPCM"},
141 {sox_encodings_lossy1, "OKI ADPCM" , "OKI ADPCM"},
142 {sox_encodings_lossy1, "DPCM" , "DPCM"},
143 {sox_encodings_none , "DWVW" , "DWVW"},
144 {sox_encodings_none , "DWVWN" , "DWVWN"},
145 {sox_encodings_lossy2, "GSM" , "GSM"},
146 {sox_encodings_lossy2, "MPEG audio" , "MPEG audio (layer I, II or III)"},
147 {sox_encodings_lossy2, "Vorbis" , "Vorbis"},
148 {sox_encodings_lossy2, "AMR-WB" , "AMR-WB"},
149 {sox_encodings_lossy2, "AMR-NB" , "AMR-NB"},
150 {sox_encodings_lossy2, "CVSD" , "CVSD"},
151 {sox_encodings_lossy2, "LPC10" , "LPC10"},
152 {sox_encodings_lossy2, "Opus" , "Opus"},
153 };
154
155 assert_static(array_length(s_sox_encodings_info) == SOX_ENCODINGS,
156 SIZE_MISMATCH_BETWEEN_sox_encoding_t_AND_sox_encodings_info);
157
158 sox_encodings_info_t const *
159 sox_get_encodings_info(void)
160 {
161 return s_sox_encodings_info;
162 }
163
164 unsigned sox_precision(sox_encoding_t encoding, unsigned bits_per_sample)
165 {
166 switch (encoding) {
167 case SOX_ENCODING_DWVW: return bits_per_sample;
168 case SOX_ENCODING_DWVWN: return !bits_per_sample? 16: 0; /* ? */
169 case SOX_ENCODING_HCOM: return !(bits_per_sample & 7) && (bits_per_sample >> 3) - 1 < 1? bits_per_sample: 0;
170 case SOX_ENCODING_WAVPACK:
171 case SOX_ENCODING_FLAC: return !(bits_per_sample & 7) && (bits_per_sample >> 3) - 1 < 4? bits_per_sample: 0;
172 case SOX_ENCODING_SIGN2: return bits_per_sample <= 32? bits_per_sample : 0;
173 case SOX_ENCODING_UNSIGNED: return !(bits_per_sample & 7) && (bits_per_sample >> 3) - 1 < 4? bits_per_sample: 0;
174
175 case SOX_ENCODING_ALAW: return bits_per_sample == 8? 13: 0;
176 case SOX_ENCODING_ULAW: return bits_per_sample == 8? 14: 0;
177
178 case SOX_ENCODING_CL_ADPCM: return bits_per_sample? 8: 0;
179 case SOX_ENCODING_CL_ADPCM16: return bits_per_sample == 4? 13: 0;
180 case SOX_ENCODING_MS_ADPCM: return bits_per_sample == 4? 14: 0;
181 case SOX_ENCODING_IMA_ADPCM: return bits_per_sample == 4? 13: 0;
182 case SOX_ENCODING_OKI_ADPCM: return bits_per_sample == 4? 12: 0;
183 case SOX_ENCODING_G721: return bits_per_sample == 4? 12: 0;
184 case SOX_ENCODING_G723: return bits_per_sample == 3? 8:
185 bits_per_sample == 5? 14: 0;
186 case SOX_ENCODING_CVSD: return bits_per_sample == 1? 16: 0;
187 case SOX_ENCODING_DPCM: return bits_per_sample; /* ? */
188
189 case SOX_ENCODING_MP3: return 0; /* Accept the precision returned by the format. */
190
191 case SOX_ENCODING_GSM:
192 case SOX_ENCODING_VORBIS:
193 case SOX_ENCODING_OPUS:
194 case SOX_ENCODING_AMR_WB:
195 case SOX_ENCODING_AMR_NB:
196 case SOX_ENCODING_LPC10: return !bits_per_sample? 16: 0;
197
198 case SOX_ENCODING_WAVPACKF:
199 case SOX_ENCODING_FLOAT: return bits_per_sample == 32 ? 25: bits_per_sample == 64 ? 54: 0;
200 case SOX_ENCODING_FLOAT_TEXT: return !bits_per_sample? 54: 0;
201
202 case SOX_ENCODINGS:
203 case SOX_ENCODING_UNKNOWN: break;
204 }
205 return 0;
206 }
207
208 void sox_init_encodinginfo(sox_encodinginfo_t * e)
209 {
210 e->reverse_bytes = sox_option_default;
211 e->reverse_nibbles = sox_option_default;
212 e->reverse_bits = sox_option_default;
213 e->compression = HUGE_VAL;
214 }
215
216 /*--------------------------------- Comments ---------------------------------*/
217
218 size_t sox_num_comments(sox_comments_t comments)
219 {
220 size_t result = 0;
221 if (!comments)
222 return 0;
223 while (*comments++)
224 ++result;
225 return result;
226 }
227
228 void sox_append_comment(sox_comments_t * comments, char const * comment)
229 {
230 size_t n = sox_num_comments(*comments);
231 *comments = lsx_realloc(*comments, (n + 2) * sizeof(**comments));
232 assert(comment);
233 (*comments)[n++] = lsx_strdup(comment);
234 (*comments)[n] = 0;
235 }
236
237 void sox_append_comments(sox_comments_t * comments, char const * comment)
238 {
239 char * end;
240 if (comment) {
241 while ((end = strchr(comment, '\n'))) {
242 size_t len = end - comment;
243 char * c = lsx_malloc((len + 1) * sizeof(*c));
244 strncpy(c, comment, len);
245 c[len] = '\0';
246 sox_append_comment(comments, c);
247 comment += len + 1;
248 free(c);
249 }
250 if (*comment)
251 sox_append_comment(comments, comment);
252 }
253 }
254
255 sox_comments_t sox_copy_comments(sox_comments_t comments)
256 {
257 sox_comments_t result = 0;
258
259 if (comments) while (*comments)
260 sox_append_comment(&result, *comments++);
261 return result;
262 }
263
264 void sox_delete_comments(sox_comments_t * comments)
265 {
266 sox_comments_t p = *comments;
267
268 if (p) while (*p)
269 free(*p++);
270 free(*comments);
271 *comments = 0;
272 }
273
274 char * lsx_cat_comments(sox_comments_t comments)
275 {
276 sox_comments_t p = comments;
277 size_t len = 0;
278 char * result;
279
280 if (p) while (*p)
281 len += strlen(*p++) + 1;
282
283 result = lsx_calloc(len? len : 1, sizeof(*result));
284
285 if ((p = comments) && *p) {
286 strcpy(result, *p);
287 while (*++p)
288 strcat(strcat(result, "\n"), *p);
289 }
290 return result;
291 }
292
293 char const * sox_find_comment(sox_comments_t comments, char const * id)
294 {
295 size_t len = strlen(id);
296
297 if (comments) for (;*comments; ++comments)
298 if (!strncasecmp(*comments, id, len) && (*comments)[len] == '=')
299 return *comments + len + 1;
300 return NULL;
301 }
302
303 static void set_endiannesses(sox_format_t * ft)
304 {
305 if (ft->handler.flags & SOX_FILE_ENDIAN) {
306 sox_bool file_is_bigendian = !(ft->handler.flags & SOX_FILE_ENDBIG);
307
308 if (ft->encoding.opposite_endian) {
309 ft->encoding.reverse_bytes = file_is_bigendian != MACHINE_IS_BIGENDIAN;
310 lsx_report("`%s': overriding file-type byte-order", ft->filename);
311 } else if (ft->encoding.reverse_bytes == sox_option_default) {
312 ft->encoding.reverse_bytes = file_is_bigendian == MACHINE_IS_BIGENDIAN;
313 }
314 } else {
315 if (ft->encoding.opposite_endian) {
316 ft->encoding.reverse_bytes = sox_option_yes;
317 lsx_report("`%s': overriding machine byte-order", ft->filename);
318 } else if (ft->encoding.reverse_bytes == sox_option_default) {
319 ft->encoding.reverse_bytes = sox_option_no;
320 }
321 }
322
323 /* FIXME: Change reports to suitable warnings if trying
324 * to override something that can't be overridden. */
325
326 if (ft->encoding.reverse_bits == sox_option_default)
327 ft->encoding.reverse_bits = !!(ft->handler.flags & SOX_FILE_BIT_REV);
328 else if (ft->encoding.reverse_bits == !(ft->handler.flags & SOX_FILE_BIT_REV))
329 lsx_report("`%s': overriding file-type bit-order", ft->filename);
330
331 if (ft->encoding.reverse_nibbles == sox_option_default)
332 ft->encoding.reverse_nibbles = !!(ft->handler.flags & SOX_FILE_NIB_REV);
333 else
334 if (ft->encoding.reverse_nibbles == !(ft->handler.flags & SOX_FILE_NIB_REV))
335 lsx_report("`%s': overriding file-type nibble-order", ft->filename);
336 }
337
338 static sox_bool is_seekable(sox_format_t const * ft)
339 {
340 assert(ft);
341 if (!ft->fp)
342 return sox_false;
343
344 return !fseek(ft->fp, 0, SEEK_CUR);
345 }
346
347 /* check that all settings have been given */
348 static int sox_checkformat(sox_format_t * ft)
349 {
350 ft->sox_errno = SOX_SUCCESS;
351
352 if (ft->signal.rate <= 0) {
353 lsx_fail_errno(ft, SOX_EFMT, "sample rate zero or negative");
354 return SOX_EOF;
355 }
356 if (!ft->signal.precision) {
357 lsx_fail_errno(ft,SOX_EFMT,"data encoding or sample size was not specified");
358 return SOX_EOF;
359 }
360 return SOX_SUCCESS;
361 }
362
363 static sox_bool is_url(char const * text) /* detects only wget-supported URLs */
364 {
365 return !(
366 strncasecmp(text, "http:" , (size_t)5) &&
367 strncasecmp(text, "https:", (size_t)6) &&
368 strncasecmp(text, "ftp:" , (size_t)4));
369 }
370
371 static int xfclose(FILE * file, lsx_io_type io_type)
372 {
373 return
374 #ifdef HAVE_POPEN
375 io_type != lsx_io_file? pclose(file) :
376 #endif
377 fclose(file);
378 }
379
380 static void incr_pipe_size(FILE *f)
381 {
382 /*
383 * Linux 2.6.35 and later has the ability to expand the pipe buffer
384 * Try to get it as big as possible to avoid stalls when SoX itself
385 * is using big buffers
386 */
387 #if defined(F_GETPIPE_SZ) && defined(F_SETPIPE_SZ)
388 static long max_pipe_size;
389
390 /* read the maximum size of the pipe the first time this is called */
391 if (max_pipe_size == 0) {
392 const char path[] = "/proc/sys/fs/pipe-max-size";
393 int fd = open(path, O_RDONLY);
394
395 max_pipe_size = -1;
396 if (fd >= 0) {
397 char buf[80];
398 ssize_t r = read(fd, buf, sizeof(buf) - 1);
399
400 if (r > 0) {
401 buf[r] = 0;
402 max_pipe_size = strtol(buf, NULL, 10);
403
404 /* guard against obviously wrong values on messed up systems */
405 if (max_pipe_size <= PIPE_BUF || max_pipe_size > INT_MAX)
406 max_pipe_size = -1;
407 }
408 close(fd);
409 }
410 }
411
412 if (max_pipe_size > PIPE_BUF) {
413 int fd = fileno(f);
414
415 if (fcntl(fd, F_SETPIPE_SZ, max_pipe_size) >= 0)
416 lsx_debug("got pipe %ld bytes\n", max_pipe_size);
417 else
418 lsx_warn("couldn't set pipe size to %ld bytes: %s\n",
419 max_pipe_size, strerror(errno));
420 }
421 #endif /* do nothing for platforms without F_{GET,SET}PIPE_SZ */
422 }
423
424 static FILE * xfopen(char const * identifier, char const * mode, lsx_io_type * io_type)
425 {
426 *io_type = lsx_io_file;
427
428 if (*identifier == '|') {
429 FILE * f = NULL;
430 #ifdef HAVE_POPEN
431 #ifndef POPEN_MODE
432 #define POPEN_MODE "r"
433 #endif
434 f = popen(identifier + 1, POPEN_MODE);
435 *io_type = lsx_io_pipe;
436 incr_pipe_size(f);
437 #else
438 lsx_fail("this build of SoX cannot open pipes");
439 #endif
440 return f;
441 }
442 else if (is_url(identifier)) {
443 FILE * f = NULL;
444 #ifdef HAVE_POPEN
445 char const * const command_format = "wget --no-check-certificate -q -O- \"%s\"";
446 char * command = lsx_malloc(strlen(command_format) + strlen(identifier));
447 sprintf(command, command_format, identifier);
448 f = popen(command, POPEN_MODE);
449 incr_pipe_size(f);
450 free(command);
451 *io_type = lsx_io_url;
452 #else
453 lsx_fail("this build of SoX cannot open URLs");
454 #endif
455 return f;
456 }
457 return fopen(identifier, mode);
458 }
459
460 /* Hack to rewind pipes (a small amount).
461 * Works by resetting the FILE buffer pointer */
462 static void UNUSED rewind_pipe(FILE * fp)
463 {
464 /* _FSTDIO is for Torek stdio (i.e. most BSD-derived libc's)
465 * In theory, we no longer need to check _NEWLIB_VERSION or __APPLE__ */
466 #if defined _FSTDIO || defined _NEWLIB_VERSION || defined __APPLE__
467 fp->_p -= PIPE_AUTO_DETECT_SIZE;
468 fp->_r += PIPE_AUTO_DETECT_SIZE;
469 #elif defined __GLIBC__
470 fp->_IO_read_ptr = fp->_IO_read_base;
471 #elif defined _MSC_VER && _MSC_VER >= 1900
472 #define NO_REWIND_PIPE
473 #elif defined _MSC_VER || defined _WIN32 || defined _WIN64 || \
474 defined _ISO_STDIO_ISO_H || defined __sgi
475 fp->_ptr = fp->_base;
476 #else
477 /* To fix this #error, either simply remove the #error line and live without
478 * file-type detection with pipes, or add support for your compiler in the
479 * lines above. Test with cat monkey.wav | ./sox --info - */
480 #error FIX NEEDED HERE
481 #define NO_REWIND_PIPE
482 (void)fp;
483 #endif
484 }
485
486 static sox_format_t * open_read(
487 char const * path,
488 void * buffer UNUSED,
489 size_t buffer_size UNUSED,
490 sox_signalinfo_t const * signal,
491 sox_encodinginfo_t const * encoding,
492 char const * filetype)
493 {
494 sox_format_t * ft = lsx_calloc(1, sizeof(*ft));
495 sox_format_handler_t const * handler;
496 char const * const io_types[] = {"file", "pipe", "file URL"};
497 char const * type = "";
498 size_t input_bufsiz = sox_globals.input_bufsiz?
499 sox_globals.input_bufsiz : sox_globals.bufsiz;
500
501 if (filetype) {
502 if (!(handler = sox_find_format(filetype, sox_false))) {
503 lsx_fail("no handler for given file type `%s'", filetype);
504 goto error;
505 }
506 ft->handler = *handler;
507 }
508
509 if (!(ft->handler.flags & SOX_FILE_NOSTDIO)) {
510 if (!strcmp(path, "-")) { /* Use stdin if the filename is "-" */
511 if (sox_globals.stdin_in_use_by) {
512 lsx_fail("`-' (stdin) already in use by `%s'", sox_globals.stdin_in_use_by);
513 goto error;
514 }
515 sox_globals.stdin_in_use_by = "audio input";
516 SET_BINARY_MODE(stdin);
517 ft->fp = stdin;
518 }
519 else {
520 ft->fp =
521 #ifdef HAVE_FMEMOPEN
522 buffer? fmemopen(buffer, buffer_size, "rb") :
523 #endif
524 xfopen(path, "rb", &ft->io_type);
525 type = io_types[ft->io_type];
526 if (ft->fp == NULL) {
527 lsx_fail("can't open input %s `%s': %s", type, path, strerror(errno));
528 goto error;
529 }
530 }
531 if (setvbuf (ft->fp, NULL, _IOFBF, sizeof(char) * input_bufsiz)) {
532 lsx_fail("Can't set read buffer");
533 goto error;
534 }
535 ft->seekable = is_seekable(ft);
536 }
537
538 if (!filetype) {
539 if (ft->seekable) {
540 filetype = auto_detect_format(ft, lsx_find_file_extension(path));
541 lsx_rewind(ft);
542 }
543 #ifndef NO_REWIND_PIPE
544 else if (!(ft->handler.flags & SOX_FILE_NOSTDIO) &&
545 input_bufsiz >= PIPE_AUTO_DETECT_SIZE) {
546 filetype = auto_detect_format(ft, lsx_find_file_extension(path));
547 rewind_pipe(ft->fp);
548 ft->tell_off = 0;
549 }
550 #endif
551
552 if (filetype) {
553 lsx_report("detected file format type `%s'", filetype);
554 if (!(handler = sox_find_format(filetype, sox_false))) {
555 lsx_fail("no handler for detected file type `%s'", filetype);
556 goto error;
557 }
558 }
559 else {
560 if (ft->io_type == lsx_io_pipe) {
561 filetype = "sox"; /* With successful pipe rewind, this isn't useful */
562 lsx_report("assuming input pipe `%s' has file-type `sox'", path);
563 }
564 else if (!(filetype = lsx_find_file_extension(path))) {
565 lsx_fail("can't determine type of %s `%s'", type, path);
566 goto error;
567 }
568 if (!(handler = sox_find_format(filetype, sox_true))) {
569 lsx_fail("no handler for file extension `%s'", filetype);
570 goto error;
571 }
572 }
573 ft->handler = *handler;
574 if (ft->handler.flags & SOX_FILE_NOSTDIO) {
575 xfclose(ft->fp, ft->io_type);
576 ft->fp = NULL;
577 }
578 }
579 if (!ft->handler.startread && !ft->handler.read) {
580 lsx_fail("file type `%s' isn't readable", filetype);
581 goto error;
582 }
583
584 ft->mode = 'r';
585 ft->filetype = lsx_strdup(filetype);
586 ft->filename = lsx_strdup(path);
587 if (signal)
588 ft->signal = *signal;
589
590 if (encoding)
591 ft->encoding = *encoding;
592 else sox_init_encodinginfo(&ft->encoding);
593 set_endiannesses(ft);
594
595 if ((ft->handler.flags & SOX_FILE_DEVICE) && !(ft->handler.flags & SOX_FILE_PHONY))
596 lsx_set_signal_defaults(ft);
597
598 ft->priv = lsx_calloc(1, ft->handler.priv_size);
599 /* Read and write starters can change their formats. */
600 if (ft->handler.startread && (*ft->handler.startread)(ft) != SOX_SUCCESS) {
601 lsx_fail("can't open input %s `%s': %s", type, ft->filename, ft->sox_errstr);
602 goto error;
603 }
604
605 /* Fill in some defaults: */
606 if (sox_precision(ft->encoding.encoding, ft->encoding.bits_per_sample))
607 ft->signal.precision = sox_precision(ft->encoding.encoding, ft->encoding.bits_per_sample);
608 if (!(ft->handler.flags & SOX_FILE_PHONY) && !ft->signal.channels)
609 ft->signal.channels = 1;
610
611 if (sox_checkformat(ft) != SOX_SUCCESS) {
612 lsx_fail("bad input format for %s `%s': %s", type, ft->filename, ft->sox_errstr);
613 goto error;
614 }
615
616 if (signal) {
617 if (signal->rate && signal->rate != ft->signal.rate)
618 lsx_warn("can't set sample rate %g; using %g", signal->rate, ft->signal.rate);
619 if (signal->channels && signal->channels != ft->signal.channels)
620 lsx_warn("can't set %u channels; using %u", signal->channels, ft->signal.channels);
621 }
622 return ft;
623
624 error:
625 if (ft->fp && ft->fp != stdin)
626 xfclose(ft->fp, ft->io_type);
627 free(ft->priv);
628 free(ft->filename);
629 free(ft->filetype);
630 free(ft);
631 return NULL;
632 }
633
634 sox_format_t * sox_open_read(
635 char const * path,
636 sox_signalinfo_t const * signal,
637 sox_encodinginfo_t const * encoding,
638 char const * filetype)
639 {
640 return open_read(path, NULL, (size_t)0, signal, encoding, filetype);
641 }
642
643 sox_format_t * sox_open_mem_read(
644 void * buffer,
645 size_t buffer_size,
646 sox_signalinfo_t const * signal,
647 sox_encodinginfo_t const * encoding,
648 char const * filetype)
649 {
650 return open_read("", buffer, buffer_size, signal,encoding,filetype);
651 }
652
653 sox_bool sox_format_supports_encoding(
654 char const * path,
655 char const * filetype,
656 sox_encodinginfo_t const * encoding)
657 {
658 #define enc_arg(T) (T)handler->write_formats[i++]
659 sox_bool is_file_extension = filetype == NULL;
660 sox_format_handler_t const * handler;
661 unsigned i = 0, s;
662 sox_encoding_t e;
663
664 assert(path || filetype);
665 assert(encoding);
666 if (!filetype)
667 filetype = lsx_find_file_extension(path);
668
669 if (!filetype || !(handler = sox_find_format(filetype, is_file_extension)) ||
670 !handler->write_formats)
671 return sox_false;
672 while ((e = enc_arg(sox_encoding_t))) {
673 if (e == encoding->encoding) {
674 sox_bool has_bits;
675 for (has_bits = sox_false; (s = enc_arg(unsigned)); has_bits = sox_true)
676 if (s == encoding->bits_per_sample)
677 return sox_true;
678 if (!has_bits && !encoding->bits_per_sample)
679 return sox_true;
680 break;
681 }
682 while (enc_arg(unsigned));
683 }
684 return sox_false;
685 #undef enc_arg
686 }
687
688 static void set_output_format(sox_format_t * ft)
689 {
690 sox_encoding_t e = SOX_ENCODING_UNKNOWN;
691 unsigned i, s;
692 unsigned const * encodings = ft->handler.write_formats;
693 #define enc_arg(T) (T)encodings[i++]
694
695 if (ft->handler.write_rates){
696 if (!ft->signal.rate)
697 ft->signal.rate = ft->handler.write_rates[0];
698 else {
699 sox_rate_t r;
700 i = 0;
701 while ((r = ft->handler.write_rates[i++])) {
702 if (r == ft->signal.rate)
703 break;
704 }
705 if (r != ft->signal.rate) {
706 sox_rate_t given = ft->signal.rate, max = 0;
707 ft->signal.rate = HUGE_VAL;
708 i = 0;
709 while ((r = ft->handler.write_rates[i++])) {
710 if (r > given && r < ft->signal.rate)
711 ft->signal.rate = r;
712 else max = max(r, max);
713 }
714 if (ft->signal.rate == HUGE_VAL)
715 ft->signal.rate = max;
716 lsx_warn("%s can't encode at %gHz; using %gHz", ft->handler.names[0], given, ft->signal.rate);
717 }
718 }
719 }
720 else if (!ft->signal.rate)
721 ft->signal.rate = SOX_DEFAULT_RATE;
722
723 if (ft->handler.flags & SOX_FILE_CHANS) {
724 if (ft->signal.channels == 1 && !(ft->handler.flags & SOX_FILE_MONO)) {
725 ft->signal.channels = (ft->handler.flags & SOX_FILE_STEREO)? 2 : 4;
726 lsx_warn("%s can't encode mono; setting channels to %u", ft->handler.names[0], ft->signal.channels);
727 } else
728 if (ft->signal.channels == 2 && !(ft->handler.flags & SOX_FILE_STEREO)) {
729 ft->signal.channels = (ft->handler.flags & SOX_FILE_QUAD)? 4 : 1;
730 lsx_warn("%s can't encode stereo; setting channels to %u", ft->handler.names[0], ft->signal.channels);
731 } else
732 if (ft->signal.channels == 4 && !(ft->handler.flags & SOX_FILE_QUAD)) {
733 ft->signal.channels = (ft->handler.flags & SOX_FILE_STEREO)? 2 : 1;
734 lsx_warn("%s can't encode quad; setting channels to %u", ft->handler.names[0], ft->signal.channels);
735 }
736 } else ft->signal.channels = max(ft->signal.channels, 1);
737
738 if (!encodings)
739 return;
740 /* If an encoding has been given, check if it supported by this handler */
741 if (ft->encoding.encoding) {
742 i = 0;
743 while ((e = enc_arg(sox_encoding_t))) {
744 if (e == ft->encoding.encoding)
745 break;
746 while (enc_arg(unsigned));
747 }
748 if (e != ft->encoding.encoding) {
749 lsx_warn("%s can't encode %s", ft->handler.names[0], sox_encodings_info[ft->encoding.encoding].desc);
750 ft->encoding.encoding = 0;
751 }
752 else {
753 unsigned max_p = 0;
754 unsigned max_p_s = 0;
755 unsigned given_size = 0;
756 sox_bool found = sox_false;
757 if (ft->encoding.bits_per_sample)
758 given_size = ft->encoding.bits_per_sample;
759 ft->encoding.bits_per_sample = 65;
760 while ((s = enc_arg(unsigned))) {
761 if (s == given_size)
762 found = sox_true;
763 if (sox_precision(e, s) >= ft->signal.precision) {
764 if (s < ft->encoding.bits_per_sample)
765 ft->encoding.bits_per_sample = s;
766 }
767 else if (sox_precision(e, s) > max_p) {
768 max_p = sox_precision(e, s);
769 max_p_s = s;
770 }
771 }
772 if (ft->encoding.bits_per_sample == 65)
773 ft->encoding.bits_per_sample = max_p_s;
774 if (given_size) {
775 if (found)
776 ft->encoding.bits_per_sample = given_size;
777 else lsx_warn("%s can't encode %s to %u-bit", ft->handler.names[0], sox_encodings_info[ft->encoding.encoding].desc, given_size);
778 }
779 }
780 }
781
782 /* If a size has been given, check if it supported by this handler */
783 if (!ft->encoding.encoding && ft->encoding.bits_per_sample) {
784 i = 0;
785 s= 0;
786 while (s != ft->encoding.bits_per_sample && (e = enc_arg(sox_encoding_t)))
787 while ((s = enc_arg(unsigned)) && s != ft->encoding.bits_per_sample);
788 if (s != ft->encoding.bits_per_sample) {
789 lsx_warn("%s can't encode to %u-bit", ft->handler.names[0], ft->encoding.bits_per_sample);
790 ft->encoding.bits_per_sample = 0;
791 }
792 else ft->encoding.encoding = e;
793 }
794
795 /* Find the smallest lossless encoding with precision >= signal.precision */
796 if (!ft->encoding.encoding) {
797 ft->encoding.bits_per_sample = 65;
798 i = 0;
799 while ((e = enc_arg(sox_encoding_t)))
800 while ((s = enc_arg(unsigned)))
801 if (!(sox_encodings_info[e].flags & (sox_encodings_lossy1 | sox_encodings_lossy2)) &&
802 sox_precision(e, s) >= ft->signal.precision && s < ft->encoding.bits_per_sample) {
803 ft->encoding.encoding = e;
804 ft->encoding.bits_per_sample = s;
805 }
806 }
807
808 /* Find the smallest lossy encoding with precision >= signal precision,
809 * or, if none such, the highest precision encoding */
810 if (!ft->encoding.encoding) {
811 unsigned max_p = 0;
812 sox_encoding_t max_p_e = 0;
813 unsigned max_p_s = 0;
814 i = 0;
815 while ((e = enc_arg(sox_encoding_t)))
816 do {
817 s = enc_arg(unsigned);
818 if (sox_precision(e, s) >= ft->signal.precision) {
819 if (s < ft->encoding.bits_per_sample) {
820 ft->encoding.encoding = e;
821 ft->encoding.bits_per_sample = s;
822 }
823 }
824 else if (sox_precision(e, s) > max_p) {
825 max_p = sox_precision(e, s);
826 max_p_e = e;
827 max_p_s = s;
828 }
829 } while (s);
830 if (!ft->encoding.encoding) {
831 ft->encoding.encoding = max_p_e;
832 ft->encoding.bits_per_sample = max_p_s;
833 }
834 }
835 ft->signal.precision = sox_precision(ft->encoding.encoding, ft->encoding.bits_per_sample);
836 #undef enc_arg
837 }
838
839 sox_format_handler_t const * sox_write_handler(
840 char const * path,
841 char const * filetype,
842 char const * * filetype1)
843 {
844 sox_format_handler_t const * handler;
845 if (filetype) {
846 if (!(handler = sox_find_format(filetype, sox_false))) {
847 if (filetype1)
848 lsx_fail("no handler for given file type `%s'", filetype);
849 return NULL;
850 }
851 }
852 else if (path) {
853 if (!(filetype = lsx_find_file_extension(path))) {
854 if (filetype1)
855 lsx_fail("can't determine type of `%s'", path);
856 return NULL;
857 }
858 if (!(handler = sox_find_format(filetype, sox_true))) {
859 if (filetype1)
860 lsx_fail("no handler for file extension `%s'", filetype);
861 return NULL;
862 }
863 }
864 else return NULL;
865 if (!handler->startwrite && !handler->write) {
866 if (filetype1)
867 lsx_fail("file type `%s' isn't writable", filetype);
868 return NULL;
869 }
870 if (filetype1)
871 *filetype1 = filetype;
872 return handler;
873 }
874
875 static sox_format_t * open_write(
876 char const * path,
877 void * buffer UNUSED,
878 size_t buffer_size UNUSED,
879 char * * buffer_ptr UNUSED,
880 size_t * buffer_size_ptr UNUSED,
881 sox_signalinfo_t const * signal,
882 sox_encodinginfo_t const * encoding,
883 char const * filetype,
884 sox_oob_t const * oob,
885 sox_bool (*overwrite_permitted)(const char *filename))
886 {
887 sox_format_t * ft = lsx_calloc(sizeof(*ft), 1);
888 sox_format_handler_t const * handler;
889
890 if (!path || !signal) {
891 lsx_fail("must specify file name and signal parameters to write file");
892 goto error;
893 }
894
895 if (!(handler = sox_write_handler(path, filetype, &filetype)))
896 goto error;
897
898 ft->handler = *handler;
899
900 if (!(ft->handler.flags & SOX_FILE_NOSTDIO)) {
901 if (!strcmp(path, "-")) { /* Use stdout if the filename is "-" */
902 if (sox_globals.stdout_in_use_by) {
903 lsx_fail("`-' (stdout) already in use by `%s'", sox_globals.stdout_in_use_by);
904 goto error;
905 }
906 sox_globals.stdout_in_use_by = "audio output";
907 SET_BINARY_MODE(stdout);
908 ft->fp = stdout;
909 }
910 else {
911 struct stat st;
912 if (!stat(path, &st) && (st.st_mode & S_IFMT) == S_IFREG &&
913 (overwrite_permitted && !overwrite_permitted(path))) {
914 lsx_fail("permission to overwrite `%s' denied", path);
915 goto error;
916 }
917 ft->fp =
918 #ifdef HAVE_FMEMOPEN
919 buffer? fmemopen(buffer, buffer_size, "w+b") :
920 buffer_ptr? open_memstream(buffer_ptr, buffer_size_ptr) :
921 #endif
922 fopen(path, "w+b");
923 if (ft->fp == NULL) {
924 lsx_fail("can't open output file `%s': %s", path, strerror(errno));
925 goto error;
926 }
927 }
928
929 /* stdout tends to be line-buffered. Override this */
930 /* to be Full Buffering. */
931 if (setvbuf (ft->fp, NULL, _IOFBF, sizeof(char) * sox_globals.bufsiz)) {
932 lsx_fail("Can't set write buffer");
933 goto error;
934 }
935 ft->seekable = is_seekable(ft);
936 }
937
938 ft->filetype = lsx_strdup(filetype);
939 ft->filename = lsx_strdup(path);
940 ft->mode = 'w';
941 ft->signal = *signal;
942
943 if (encoding)
944 ft->encoding = *encoding;
945 else sox_init_encodinginfo(&ft->encoding);
946 set_endiannesses(ft);
947
948 if (oob) {
949 ft->oob = *oob;
950 /* deep copy: */
951 ft->oob.comments = sox_copy_comments(oob->comments);
952 }
953
954 set_output_format(ft);
955
956 /* FIXME: doesn't cover the situation where
957 * codec changes audio length due to block alignment (e.g. 8svx, gsm): */
958 if (signal->rate && signal->channels)
959 ft->signal.length = ft->signal.length * ft->signal.rate / signal->rate *
960 ft->signal.channels / signal->channels + .5;
961
962 if ((ft->handler.flags & SOX_FILE_REWIND) && strcmp(ft->filetype, "sox") && !ft->signal.length && !ft->seekable)
963 lsx_warn("can't seek in output file `%s'; length in file header will be unspecified", ft->filename);
964
965 ft->priv = lsx_calloc(1, ft->handler.priv_size);
966 /* Read and write starters can change their formats. */
967 if (ft->handler.startwrite && (ft->handler.startwrite)(ft) != SOX_SUCCESS){
968 lsx_fail("can't open output file `%s': %s", ft->filename, ft->sox_errstr);
969 goto error;
970 }
971
972 if (sox_checkformat(ft) != SOX_SUCCESS) {
973 lsx_fail("bad format for output file `%s': %s", ft->filename, ft->sox_errstr);
974 goto error;
975 }
976
977 if ((ft->handler.flags & SOX_FILE_DEVICE) && signal) {
978 if (signal->rate && signal->rate != ft->signal.rate)
979 lsx_report("can't set sample rate %g; using %g", signal->rate, ft->signal.rate);
980 if (signal->channels && signal->channels != ft->signal.channels)
981 lsx_report("can't set %u channels; using %u", signal->channels, ft->signal.channels);
982 }
983 return ft;
984
985 error:
986 if (ft->fp && ft->fp != stdout)
987 xfclose(ft->fp, ft->io_type);
988 free(ft->priv);
989 free(ft->filename);
990 free(ft->filetype);
991 free(ft);
992 return NULL;
993 }
994
995 sox_format_t * sox_open_write(
996 char const * path,
997 sox_signalinfo_t const * signal,
998 sox_encodinginfo_t const * encoding,
999 char const * filetype,
1000 sox_oob_t const * oob,
1001 sox_bool (*overwrite_permitted)(const char *filename))
1002 {
1003 return open_write(path, NULL, (size_t)0, NULL, NULL, signal, encoding, filetype, oob, overwrite_permitted);
1004 }
1005
1006 sox_format_t * sox_open_mem_write(
1007 void * buffer,
1008 size_t buffer_size,
1009 sox_signalinfo_t const * signal,
1010 sox_encodinginfo_t const * encoding,
1011 char const * filetype,
1012 sox_oob_t const * oob)
1013 {
1014 return open_write("", buffer, buffer_size, NULL, NULL, signal, encoding, filetype, oob, NULL);
1015 }
1016
1017 sox_format_t * sox_open_memstream_write(
1018 char * * buffer_ptr,
1019 size_t * buffer_size_ptr,
1020 sox_signalinfo_t const * signal,
1021 sox_encodinginfo_t const * encoding,
1022 char const * filetype,
1023 sox_oob_t const * oob)
1024 {
1025 return open_write("", NULL, (size_t)0, buffer_ptr, buffer_size_ptr, signal, encoding, filetype, oob, NULL);
1026 }
1027
1028 size_t sox_read(sox_format_t * ft, sox_sample_t * buf, size_t len)
1029 {
1030 size_t actual;
1031 if (ft->signal.length != SOX_UNSPEC)
1032 len = min(len, ft->signal.length - ft->olength);
1033 actual = ft->handler.read? (*ft->handler.read)(ft, buf, len) : 0;
1034 actual = actual > len? 0 : actual;
1035 ft->olength += actual;
1036 return actual;
1037 }
1038
1039 size_t sox_write(sox_format_t * ft, const sox_sample_t *buf, size_t len)
1040 {
1041 size_t actual = ft->handler.write? (*ft->handler.write)(ft, buf, len) : 0;
1042 ft->olength += actual;
1043 return actual;
1044 }
1045
1046 int sox_close(sox_format_t * ft)
1047 {
1048 int result = SOX_SUCCESS;
1049
1050 if (ft->mode == 'r')
1051 result = ft->handler.stopread? (*ft->handler.stopread)(ft) : SOX_SUCCESS;
1052 else {
1053 if (ft->handler.flags & SOX_FILE_REWIND) {
1054 if (ft->olength != ft->signal.length && ft->seekable) {
1055 result = lsx_seeki(ft, (off_t)0, 0);
1056 if (result == SOX_SUCCESS)
1057 result = ft->handler.stopwrite? (*ft->handler.stopwrite)(ft)
1058 : ft->handler.startwrite?(*ft->handler.startwrite)(ft) : SOX_SUCCESS;
1059 }
1060 }
1061 else result = ft->handler.stopwrite? (*ft->handler.stopwrite)(ft) : SOX_SUCCESS;
1062 }
1063
1064 if (ft->fp == stdin) {
1065 sox_globals.stdin_in_use_by = NULL;
1066 } else if (ft->fp == stdout) {
1067 fflush(stdout);
1068 sox_globals.stdout_in_use_by = NULL;
1069 } else if (ft->fp) {
1070 xfclose(ft->fp, ft->io_type);
1071 }
1072
1073 free(ft->priv);
1074 free(ft->filename);
1075 free(ft->filetype);
1076 sox_delete_comments(&ft->oob.comments);
1077
1078 free(ft);
1079 return result;
1080 }
1081
1082 int sox_seek(sox_format_t * ft, sox_uint64_t offset, int whence)
1083 {
1084 /* FIXME: Implement SOX_SEEK_CUR and SOX_SEEK_END. */
1085 if (whence != SOX_SEEK_SET)
1086 return SOX_EOF; /* FIXME: return SOX_EINVAL */
1087
1088 /* If file is a seekable file and this handler supports seeking,
1089 * then invoke handler's function.
1090 */
1091 if (ft->seekable && ft->handler.seek)
1092 return (*ft->handler.seek)(ft, offset);
1093 return SOX_EOF; /* FIXME: return SOX_EBADF */
1094 }
1095
1096 static int strcaseends(char const * str, char const * end)
1097 {
1098 size_t str_len = strlen(str), end_len = strlen(end);
1099 return str_len >= end_len && !strcasecmp(str + str_len - end_len, end);
1100 }
1101
1102 typedef enum {None, M3u, Pls} playlist_t;
1103
1104 static playlist_t playlist_type(char const * filename)
1105 {
1106 char * x, * p;
1107 playlist_t result = None;
1108
1109 if (*filename == '|')
1110 return result;
1111 if (strcaseends(filename, ".m3u"))
1112 return M3u;
1113 if (strcaseends(filename, ".pls"))
1114 return Pls;
1115 x = lsx_strdup(filename);
1116 p = strrchr(x, '?');
1117 if (p) {
1118 *p = '\0';
1119 result = playlist_type(x);
1120 }
1121 free(x);
1122 return result;
1123 }
1124
1125 sox_bool sox_is_playlist(char const * filename)
1126 {
1127 return playlist_type(filename) != None;
1128 }
1129
1130 int sox_parse_playlist(sox_playlist_callback_t callback, void * p, char const * const listname)
1131 {
1132 sox_bool const is_pls = playlist_type(listname) == Pls;
1133 int const comment_char = "#;"[is_pls];
1134 size_t text_length = 100;
1135 char * text = lsx_malloc(text_length + 1);
1136 char * dirname = lsx_strdup(listname);
1137 char * slash_pos = LAST_SLASH(dirname);
1138 lsx_io_type io_type;
1139 FILE * file = xfopen(listname, "r", &io_type);
1140 char * filename;
1141 int c, result = SOX_SUCCESS;
1142
1143 if (!slash_pos)
1144 *dirname = '\0';
1145 else
1146 *slash_pos = '\0';
1147
1148 if (file == NULL) {
1149 lsx_fail("Can't open playlist file `%s': %s", listname, strerror(errno));
1150 result = SOX_EOF;
1151 }
1152 else {
1153 do {
1154 size_t i = 0;
1155 size_t begin = 0, end = 0;
1156
1157 while (isspace(c = getc(file)));
1158 if (c == EOF)
1159 break;
1160 while (c != EOF && !strchr("\r\n", c) && c != comment_char) {
1161 if (i == text_length)
1162 text = lsx_realloc(text, (text_length <<= 1) + 1);
1163 text[i++] = c;
1164 if (!strchr(" \t\f", c))
1165 end = i;
1166 c = getc(file);
1167 }
1168 if (ferror(file))
1169 break;
1170 if (c == comment_char) {
1171 do c = getc(file);
1172 while (c != EOF && !strchr("\r\n", c));
1173 if (ferror(file))
1174 break;
1175 }
1176 text[end] = '\0';
1177 if (is_pls) {
1178 char dummy;
1179 if (!strncasecmp(text, "file", (size_t) 4) && sscanf(text + 4, "%*u=%c", &dummy) == 1)
1180 begin = strchr(text + 5, '=') - text + 1;
1181 else end = 0;
1182 }
1183 if (begin != end) {
1184 char const * id = text + begin;
1185
1186 if (!dirname[0] || is_url(id) || IS_ABSOLUTE(id))
1187 filename = lsx_strdup(id);
1188 else {
1189 filename = lsx_malloc(strlen(dirname) + strlen(id) + 2);
1190 sprintf(filename, "%s/%s", dirname, id);
1191 }
1192 if (sox_is_playlist(filename))
1193 sox_parse_playlist(callback, p, filename);
1194 else if (callback(p, filename))
1195 c = EOF;
1196 free(filename);
1197 }
1198 } while (c != EOF);
1199
1200 if (ferror(file)) {
1201 lsx_fail("error reading playlist file `%s': %s", listname, strerror(errno));
1202 result = SOX_EOF;
1203 }
1204 if (xfclose(file, io_type) && io_type == lsx_io_url) {
1205 lsx_fail("error reading playlist file URL `%s'", listname);
1206 result = SOX_EOF;
1207 }
1208 }
1209 free(text);
1210 free(dirname);
1211 return result;
1212 }
1213
1214 /*----------------------------- Formats library ------------------------------*/
1215
1216 enum {
1217 #define FORMAT(f) f,
1218 #include "formats.h"
1219 #undef FORMAT
1220 NSTATIC_FORMATS
1221 };
1222
1223 static sox_bool plugins_initted = sox_false;
1224
1225 #ifdef HAVE_LIBLTDL /* Plugin format handlers */
1226 #define MAX_DYNAMIC_FORMATS 42
1227 #define MAX_FORMATS (NSTATIC_FORMATS + MAX_DYNAMIC_FORMATS)
1228 #define MAX_FORMATS_1 (MAX_FORMATS + 1)
1229 #define MAX_NAME_LEN (size_t)1024 /* FIXME: Use vasprintf */
1230 #else
1231 #define MAX_FORMATS_1
1232 #endif
1233
1234 #define FORMAT(f) extern sox_format_handler_t const * lsx_##f##_format_fn(void);
1235 #include "formats.h"
1236 #undef FORMAT
1237
1238 static sox_format_tab_t s_sox_format_fns[MAX_FORMATS_1] = {
1239 #define FORMAT(f) {NULL, lsx_##f##_format_fn},
1240 #include "formats.h"
1241 #undef FORMAT
1242 {NULL, NULL}
1243 };
1244
1245 const sox_format_tab_t *
1246 sox_get_format_fns(void)
1247 {
1248 return s_sox_format_fns;
1249 }
1250
1251 static unsigned nformats = NSTATIC_FORMATS;
1252
1253 #ifdef HAVE_LIBLTDL /* Plugin format handlers */
1254
1255 static int init_format(const char *file, lt_ptr data)
1256 {
1257 lt_dlhandle lth = lt_dlopenext(file);
1258 const char *end = file + strlen(file);
1259 const char prefix[] = "sox_fmt_";
1260 char fnname[MAX_NAME_LEN];
1261 char *start = strstr(file, prefix);
1262
1263 (void)data;
1264 if (start && (start += sizeof(prefix) - 1) < end) {
1265 int ret = snprintf(fnname, MAX_NAME_LEN,
1266 "lsx_%.*s_format_fn", (int)(end - start), start);
1267 if (ret > 0 && ret < (int)MAX_NAME_LEN) {
1268 union {sox_format_fn_t fn; lt_ptr ptr;} ltptr;
1269 ltptr.ptr = lt_dlsym(lth, fnname);
1270 lsx_debug("opening format plugin `%s': library %p, entry point %p\n",
1271 fnname, (void *)lth, ltptr.ptr);
1272 if (ltptr.fn && (ltptr.fn()->sox_lib_version_code & ~255) ==
1273 (SOX_LIB_VERSION_CODE & ~255)) { /* compatible version check */
1274 if (nformats == MAX_FORMATS) {
1275 lsx_warn("too many plugin formats");
1276 return -1;
1277 }
1278 s_sox_format_fns[nformats++].fn = ltptr.fn;
1279 }
1280 }
1281 }
1282 return 0;
1283 }
1284 #endif
1285
1286 int sox_format_init(void) /* Find & load format handlers. */
1287 {
1288 if (plugins_initted)
1289 return SOX_EOF;
1290
1291 plugins_initted = sox_true;
1292 #ifdef HAVE_LIBLTDL
1293 {
1294 int error = lt_dlinit();
1295 if (error) {
1296 lsx_fail("lt_dlinit failed with %d error(s): %s", error, lt_dlerror());
1297 return SOX_EOF;
1298 }
1299 lt_dlforeachfile(PKGLIBDIR, init_format, NULL);
1300 }
1301 #endif
1302 return SOX_SUCCESS;
1303 }
1304
1305 void sox_format_quit(void) /* Cleanup things. */
1306 {
1307 #ifdef HAVE_LIBLTDL
1308 int ret;
1309 if (plugins_initted && (ret = lt_dlexit()) != 0)
1310 lsx_fail("lt_dlexit failed with %d error(s): %s", ret, lt_dlerror());
1311 plugins_initted = sox_false;
1312 nformats = NSTATIC_FORMATS;
1313 #endif
1314 }
1315
1316 /* Find a named format in the formats library.
1317 *
1318 * (c) 2005-9 Chris Bagwell and SoX contributors.
1319 * Copyright 1991 Lance Norskog And Sundry Contributors.
1320 *
1321 * This source code is freely redistributable and may be used for any
1322 * purpose. This copyright notice must be maintained.
1323 *
1324 * Lance Norskog, Sundry Contributors, Chris Bagwell and SoX contributors
1325 * are not responsible for the consequences of using this software.
1326 */
1327 sox_format_handler_t const * sox_find_format(char const * name0, sox_bool no_dev)
1328 {
1329 size_t f, n;
1330
1331 if (name0) {
1332 char * name = lsx_strdup(name0);
1333 char * pos = strchr(name, ';');
1334 if (pos) /* Use only the 1st clause of a mime string */
1335 *pos = '\0';
1336 for (f = 0; f < nformats; ++f) {
1337 sox_format_handler_t const * handler = s_sox_format_fns[f].fn();
1338
1339 if (!(no_dev && (handler->flags & SOX_FILE_DEVICE)))
1340 for (n = 0; handler->names[n]; ++n)
1341 if (!strcasecmp(handler->names[n], name)) {
1342 free(name);
1343 return handler; /* Found it. */
1344 }
1345 }
1346 free(name);
1347 }
1348 if (sox_format_init() == SOX_SUCCESS) /* Try again with plugins */
1349 return sox_find_format(name0, no_dev);
1350 return NULL;
1351 }
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