Fix a read past end of buffer crash in the mp3 probe
[libav.git] / libavformat / mp3.c
CommitLineData
115329f1 1/*
7fbde343 2 * MP3 muxer and demuxer
406792e7 3 * Copyright (c) 2003 Fabrice Bellard
6a58e151 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
6a58e151
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
6a58e151 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
6a58e151
FB
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
6a58e151 20 */
245976da 21
ea452b54 22#include <strings.h>
245976da
DB
23#include "libavutil/avstring.h"
24#include "libavcodec/mpegaudio.h"
25#include "libavcodec/mpegaudiodecheader.h"
6a58e151 26#include "avformat.h"
2ea512a6 27#include "id3v2.h"
6a58e151 28
cb2578d5 29#define ID3v1_TAG_SIZE 128
6a58e151 30
cb2578d5 31#define ID3v1_GENRE_MAX 125
6a58e151 32
1bef65f4 33static const char * const id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
6a58e151
FB
34 [0] = "Blues",
35 [1] = "Classic Rock",
36 [2] = "Country",
37 [3] = "Dance",
38 [4] = "Disco",
39 [5] = "Funk",
40 [6] = "Grunge",
41 [7] = "Hip-Hop",
42 [8] = "Jazz",
43 [9] = "Metal",
44 [10] = "New Age",
45 [11] = "Oldies",
46 [12] = "Other",
47 [13] = "Pop",
48 [14] = "R&B",
49 [15] = "Rap",
50 [16] = "Reggae",
51 [17] = "Rock",
52 [18] = "Techno",
53 [19] = "Industrial",
54 [20] = "Alternative",
55 [21] = "Ska",
56 [22] = "Death Metal",
57 [23] = "Pranks",
58 [24] = "Soundtrack",
59 [25] = "Euro-Techno",
60 [26] = "Ambient",
61 [27] = "Trip-Hop",
62 [28] = "Vocal",
63 [29] = "Jazz+Funk",
64 [30] = "Fusion",
65 [31] = "Trance",
66 [32] = "Classical",
67 [33] = "Instrumental",
68 [34] = "Acid",
69 [35] = "House",
70 [36] = "Game",
71 [37] = "Sound Clip",
72 [38] = "Gospel",
73 [39] = "Noise",
74 [40] = "AlternRock",
75 [41] = "Bass",
76 [42] = "Soul",
77 [43] = "Punk",
78 [44] = "Space",
79 [45] = "Meditative",
80 [46] = "Instrumental Pop",
81 [47] = "Instrumental Rock",
82 [48] = "Ethnic",
83 [49] = "Gothic",
84 [50] = "Darkwave",
85 [51] = "Techno-Industrial",
86 [52] = "Electronic",
87 [53] = "Pop-Folk",
88 [54] = "Eurodance",
89 [55] = "Dream",
90 [56] = "Southern Rock",
91 [57] = "Comedy",
92 [58] = "Cult",
93 [59] = "Gangsta",
94 [60] = "Top 40",
95 [61] = "Christian Rap",
96 [62] = "Pop/Funk",
97 [63] = "Jungle",
98 [64] = "Native American",
99 [65] = "Cabaret",
100 [66] = "New Wave",
101 [67] = "Psychadelic",
102 [68] = "Rave",
103 [69] = "Showtunes",
104 [70] = "Trailer",
105 [71] = "Lo-Fi",
106 [72] = "Tribal",
107 [73] = "Acid Punk",
108 [74] = "Acid Jazz",
109 [75] = "Polka",
110 [76] = "Retro",
111 [77] = "Musical",
112 [78] = "Rock & Roll",
113 [79] = "Hard Rock",
114 [80] = "Folk",
115 [81] = "Folk-Rock",
116 [82] = "National Folk",
117 [83] = "Swing",
118 [84] = "Fast Fusion",
119 [85] = "Bebob",
120 [86] = "Latin",
121 [87] = "Revival",
122 [88] = "Celtic",
123 [89] = "Bluegrass",
124 [90] = "Avantgarde",
125 [91] = "Gothic Rock",
126 [92] = "Progressive Rock",
127 [93] = "Psychedelic Rock",
128 [94] = "Symphonic Rock",
129 [95] = "Slow Rock",
130 [96] = "Big Band",
131 [97] = "Chorus",
132 [98] = "Easy Listening",
133 [99] = "Acoustic",
134 [100] = "Humour",
135 [101] = "Speech",
136 [102] = "Chanson",
137 [103] = "Opera",
138 [104] = "Chamber Music",
139 [105] = "Sonata",
140 [106] = "Symphony",
141 [107] = "Booty Bass",
142 [108] = "Primus",
143 [109] = "Porn Groove",
144 [110] = "Satire",
145 [111] = "Slow Jam",
146 [112] = "Club",
147 [113] = "Tango",
148 [114] = "Samba",
149 [115] = "Folklore",
150 [116] = "Ballad",
151 [117] = "Power Ballad",
152 [118] = "Rhythmic Soul",
153 [119] = "Freestyle",
154 [120] = "Duet",
155 [121] = "Punk Rock",
156 [122] = "Drum Solo",
157 [123] = "A capella",
158 [124] = "Euro-House",
159 [125] = "Dance Hall",
160};
161
52b53f86
162static unsigned int id3v2_get_size(ByteIOContext *s, int len)
163{
164 int v=0;
165 while(len--)
166 v= (v<<7) + (get_byte(s)&0x7F);
167 return v;
168}
169
170static void id3v2_read_ttag(AVFormatContext *s, int taglen, char *dst, int dstlen)
171{
172 char *q;
173 int len;
174
d5ae4584
MN
175 if(dstlen > 0)
176 dst[0]= 0;
52b53f86
177 if(taglen < 1)
178 return;
179
180 taglen--; /* account for encoding type byte */
181 dstlen--; /* Leave space for zero terminator */
182
899681cd 183 switch(get_byte(s->pb)) { /* encoding type */
52b53f86
184
185 case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */
186 q = dst;
187 while(taglen--) {
188 uint8_t tmp;
899681cd 189 PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
52b53f86
190 }
191 *q = '\0';
192 break;
193
194 case 3: /* UTF-8 */
03289958 195 len = FFMIN(taglen, dstlen-1);
899681cd 196 get_buffer(s->pb, dst, len);
52b53f86
197 dst[len] = 0;
198 break;
199 }
200}
201
202/**
203 * ID3v2 parser
204 *
205 * Handles ID3v2.2, 2.3 and 2.4.
206 *
207 */
208
209static void id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
210{
211 int isv34, tlen;
212 uint32_t tag;
bc5c918e 213 int64_t next;
52b53f86
214 char tmp[16];
215 int taghdrlen;
216 const char *reason;
217
218 switch(version) {
219 case 2:
220 if(flags & 0x40) {
221 reason = "compression";
222 goto error;
223 }
224 isv34 = 0;
225 taghdrlen = 6;
226 break;
227
c21f308e
RS
228 case 3:
229 case 4:
52b53f86
230 isv34 = 1;
231 taghdrlen = 10;
232 break;
233
234 default:
235 reason = "version";
236 goto error;
237 }
238
239 if(flags & 0x80) {
240 reason = "unsynchronization";
241 goto error;
242 }
243
244 if(isv34 && flags & 0x40) /* Extended header present, just skip over it */
899681cd 245 url_fskip(s->pb, id3v2_get_size(s->pb, 4));
52b53f86
246
247 while(len >= taghdrlen) {
248 if(isv34) {
899681cd
BA
249 tag = get_be32(s->pb);
250 tlen = id3v2_get_size(s->pb, 4);
251 get_be16(s->pb); /* flags */
52b53f86 252 } else {
899681cd
BA
253 tag = get_be24(s->pb);
254 tlen = id3v2_get_size(s->pb, 3);
52b53f86
255 }
256 len -= taghdrlen + tlen;
257
258 if(len < 0)
259 break;
260
899681cd 261 next = url_ftell(s->pb) + tlen;
52b53f86
262
263 switch(tag) {
264 case MKBETAG('T', 'I', 'T', '2'):
265 case MKBETAG(0, 'T', 'T', '2'):
266 id3v2_read_ttag(s, tlen, s->title, sizeof(s->title));
267 break;
268 case MKBETAG('T', 'P', 'E', '1'):
269 case MKBETAG(0, 'T', 'P', '1'):
270 id3v2_read_ttag(s, tlen, s->author, sizeof(s->author));
271 break;
272 case MKBETAG('T', 'A', 'L', 'B'):
273 case MKBETAG(0, 'T', 'A', 'L'):
274 id3v2_read_ttag(s, tlen, s->album, sizeof(s->album));
275 break;
276 case MKBETAG('T', 'C', 'O', 'N'):
277 case MKBETAG(0, 'T', 'C', 'O'):
278 id3v2_read_ttag(s, tlen, s->genre, sizeof(s->genre));
279 break;
280 case MKBETAG('T', 'C', 'O', 'P'):
281 case MKBETAG(0, 'T', 'C', 'R'):
282 id3v2_read_ttag(s, tlen, s->copyright, sizeof(s->copyright));
283 break;
284 case MKBETAG('T', 'R', 'C', 'K'):
285 case MKBETAG(0, 'T', 'R', 'K'):
286 id3v2_read_ttag(s, tlen, tmp, sizeof(tmp));
287 s->track = atoi(tmp);
288 break;
289 case 0:
290 /* padding, skip to end */
899681cd 291 url_fskip(s->pb, len);
52b53f86
292 len = 0;
293 continue;
294 }
295 /* Skip to end of tag */
899681cd 296 url_fseek(s->pb, next, SEEK_SET);
52b53f86
297 }
298
299 if(version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
899681cd 300 url_fskip(s->pb, 10);
52b53f86
301 return;
302
303 error:
304 av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
899681cd 305 url_fskip(s->pb, len);
52b53f86
306}
307
cb2578d5
308static void id3v1_get_string(char *str, int str_size,
309 const uint8_t *buf, int buf_size)
6a58e151
FB
310{
311 int i, c;
312 char *q;
313
314 q = str;
315 for(i = 0; i < buf_size; i++) {
316 c = buf[i];
317 if (c == '\0')
318 break;
319 if ((q - str) >= str_size - 1)
320 break;
321 *q++ = c;
322 }
323 *q = '\0';
324}
325
cb2578d5
326/* 'buf' must be ID3v1_TAG_SIZE byte long */
327static int id3v1_parse_tag(AVFormatContext *s, const uint8_t *buf)
6a58e151
FB
328{
329 char str[5];
330 int genre;
115329f1 331
6a58e151
FB
332 if (!(buf[0] == 'T' &&
333 buf[1] == 'A' &&
334 buf[2] == 'G'))
335 return -1;
cb2578d5
336 id3v1_get_string(s->title, sizeof(s->title), buf + 3, 30);
337 id3v1_get_string(s->author, sizeof(s->author), buf + 33, 30);
338 id3v1_get_string(s->album, sizeof(s->album), buf + 63, 30);
339 id3v1_get_string(str, sizeof(str), buf + 93, 4);
6a58e151 340 s->year = atoi(str);
cb2578d5 341 id3v1_get_string(s->comment, sizeof(s->comment), buf + 97, 30);
6a58e151
FB
342 if (buf[125] == 0 && buf[126] != 0)
343 s->track = buf[126];
344 genre = buf[127];
cb2578d5 345 if (genre <= ID3v1_GENRE_MAX)
75e61b0e 346 av_strlcpy(s->genre, id3v1_genre_str[genre], sizeof(s->genre));
6a58e151
FB
347 return 0;
348}
349
6a58e151 350/* mp3 read */
dc4ed3b1
MR
351
352static int mp3_read_probe(AVProbeData *p)
353{
ea7599ba 354 int max_frames, first_frames = 0;
498c544a 355 int fsize, frames, sample_rate;
abade142 356 uint32_t header;
ac3ef4a4 357 uint8_t *buf, *buf0, *buf2, *end;
abade142 358 AVCodecContext avctx;
dc4ed3b1 359
ac3ef4a4
AC
360 buf0 = p->buf;
361 if(ff_id3v2_match(buf0)) {
362 buf0 += ff_id3v2_tag_len(buf0);
363 }
dc4ed3b1 364
abade142 365 max_frames = 0;
ac3ef4a4 366 buf = buf0;
38cef584 367 end = p->buf + p->buf_size - sizeof(uint32_t);
dc4ed3b1 368
5ef5501b 369 for(; buf < end; buf= buf2+1) {
abade142 370 buf2 = buf;
dc4ed3b1 371
d0702de9 372 for(frames = 0; buf2 < end; frames++) {
80fb8234 373 header = AV_RB32(buf2);
c96bd212 374 fsize = ff_mpa_decode_header(&avctx, header, &sample_rate, &sample_rate, &sample_rate, &sample_rate);
abade142
375 if(fsize < 0)
376 break;
377 buf2 += fsize;
378 }
379 max_frames = FFMAX(max_frames, frames);
ac3ef4a4 380 if(buf == buf0)
22668218 381 first_frames= frames;
abade142 382 }
22668218 383 if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
2db97113 384 else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
22668218
MN
385 else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
386 else if(max_frames>=1) return 1;
abade142 387 else return 0;
dc4ed3b1
MR
388}
389
ca851a3a 390/**
8862fb41 391 * Try to find Xing/Info/VBRI tags and compute duration from info therein
ca851a3a 392 */
853a9753 393static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
ca851a3a 394{
db233e83
395 uint32_t v, spf;
396 int frames = -1; /* Total number of frames in file */
bc5c918e 397 const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
ca851a3a 398 MPADecodeContext c;
853a9753 399 int vbrtag_size = 0;
ca851a3a 400
899681cd 401 v = get_be32(s->pb);
5b5bd7c9 402 if(ff_mpa_check_header(v) < 0)
853a9753 403 return -1;
5b5bd7c9 404
853a9753
YS
405 if (ff_mpegaudio_decode_header(&c, v) == 0)
406 vbrtag_size = c.frame_size;
db233e83 407 if(c.layer != 3)
853a9753 408 return -1;
ca851a3a 409
db233e83 410 /* Check for Xing / Info tag */
899681cd
BA
411 url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
412 v = get_be32(s->pb);
db233e83 413 if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
899681cd 414 v = get_be32(s->pb);
478638ab 415 if(v & 0x1)
899681cd 416 frames = get_be32(s->pb);
ca851a3a 417 }
db233e83 418
8862fb41 419 /* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */
899681cd
BA
420 url_fseek(s->pb, base + 4 + 32, SEEK_SET);
421 v = get_be32(s->pb);
8862fb41
422 if(v == MKBETAG('V', 'B', 'R', 'I')) {
423 /* Check tag version */
899681cd 424 if(get_be16(s->pb) == 1) {
8862fb41 425 /* skip delay, quality and total bytes */
899681cd
BA
426 url_fseek(s->pb, 8, SEEK_CUR);
427 frames = get_be32(s->pb);
8862fb41
428 }
429 }
430
db233e83 431 if(frames < 0)
853a9753
YS
432 return -1;
433
434 /* Skip the vbr tag frame */
435 url_fseek(s->pb, base + vbrtag_size, SEEK_SET);
db233e83
436
437 spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
438 st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
439 st->time_base);
853a9753 440 return 0;
ca851a3a
441}
442
6a58e151
FB
443static int mp3_read_header(AVFormatContext *s,
444 AVFormatParameters *ap)
445{
446 AVStream *st;
cb2578d5 447 uint8_t buf[ID3v1_TAG_SIZE];
6a58e151 448 int len, ret, filesize;
bc5c918e 449 int64_t off;
6a58e151
FB
450
451 st = av_new_stream(s, 0);
452 if (!st)
769e10f0 453 return AVERROR(ENOMEM);
6a58e151 454
01f4895c
MN
455 st->codec->codec_type = CODEC_TYPE_AUDIO;
456 st->codec->codec_id = CODEC_ID_MP3;
57004ff1 457 st->need_parsing = AVSTREAM_PARSE_FULL;
f97931c1 458 st->start_time = 0;
115329f1 459
6a58e151 460 /* try to get the TAG */
899681cd 461 if (!url_is_streamed(s->pb)) {
6a58e151 462 /* XXX: change that */
899681cd 463 filesize = url_fsize(s->pb);
6a58e151 464 if (filesize > 128) {
899681cd
BA
465 url_fseek(s->pb, filesize - 128, SEEK_SET);
466 ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE);
cb2578d5
467 if (ret == ID3v1_TAG_SIZE) {
468 id3v1_parse_tag(s, buf);
6a58e151 469 }
899681cd 470 url_fseek(s->pb, 0, SEEK_SET);
6a58e151
FB
471 }
472 }
473
cb2578d5 474 /* if ID3v2 header found, skip it */
899681cd 475 ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
cb2578d5 476 if (ret != ID3v2_HEADER_SIZE)
6a58e151 477 return -1;
2ea512a6 478 if (ff_id3v2_match(buf)) {
52b53f86 479 /* parse ID3v2 header */
6a58e151
FB
480 len = ((buf[6] & 0x7f) << 21) |
481 ((buf[7] & 0x7f) << 14) |
482 ((buf[8] & 0x7f) << 7) |
483 (buf[9] & 0x7f);
52b53f86 484 id3v2_parse(s, len, buf[3], buf[5]);
6a58e151 485 } else {
899681cd 486 url_fseek(s->pb, 0, SEEK_SET);
6a58e151
FB
487 }
488
899681cd 489 off = url_ftell(s->pb);
853a9753
YS
490 if (mp3_parse_vbr_tags(s, st, off) < 0)
491 url_fseek(s->pb, off, SEEK_SET);
ca851a3a 492
6a58e151
FB
493 /* the parameters will be extracted from the compressed bitstream */
494 return 0;
495}
496
497#define MP3_PACKET_SIZE 1024
498
499static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
500{
501 int ret, size;
502 // AVStream *st = s->streams[0];
115329f1 503
6a58e151
FB
504 size= MP3_PACKET_SIZE;
505
899681cd 506 ret= av_get_packet(s->pb, pkt, size);
6a58e151
FB
507
508 pkt->stream_index = 0;
6a58e151 509 if (ret <= 0) {
6f3e0b21 510 return AVERROR(EIO);
6a58e151
FB
511 }
512 /* note: we need to modify the packet size here to handle the last
513 packet */
514 pkt->size = ret;
515 return ret;
516}
517
b250f9c6 518#if CONFIG_MP2_MUXER || CONFIG_MP3_MUXER
58607ca7
DB
519static void id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
520{
521 int v, i;
522
523 memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */
524 buf[0] = 'T';
525 buf[1] = 'A';
526 buf[2] = 'G';
527 strncpy(buf + 3, s->title, 30);
528 strncpy(buf + 33, s->author, 30);
529 strncpy(buf + 63, s->album, 30);
530 v = s->year;
531 if (v > 0) {
532 for(i = 0;i < 4; i++) {
533 buf[96 - i] = '0' + (v % 10);
534 v = v / 10;
535 }
536 }
537 strncpy(buf + 97, s->comment, 30);
538 if (s->track != 0) {
539 buf[125] = 0;
540 buf[126] = s->track;
541 }
542 for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
543 if (!strcasecmp(s->genre, id3v1_genre_str[i])) {
544 buf[127] = i;
545 break;
546 }
547 }
548}
549
6a58e151 550/* simple formats */
0dc56bfa
551
552static void id3v2_put_size(AVFormatContext *s, int size)
553{
899681cd
BA
554 put_byte(s->pb, size >> 21 & 0x7f);
555 put_byte(s->pb, size >> 14 & 0x7f);
556 put_byte(s->pb, size >> 7 & 0x7f);
557 put_byte(s->pb, size & 0x7f);
0dc56bfa
558}
559
8df94c73 560static void id3v2_put_ttag(AVFormatContext *s, const char *string, uint32_t tag)
0dc56bfa
561{
562 int len = strlen(string);
899681cd 563 put_be32(s->pb, tag);
0dc56bfa 564 id3v2_put_size(s, len + 1);
899681cd
BA
565 put_be16(s->pb, 0);
566 put_byte(s->pb, 3); /* UTF-8 */
567 put_buffer(s->pb, string, len);
0dc56bfa
568}
569
570
571/**
572 * Write an ID3v2.4 header at beginning of stream
573 */
574
6a58e151
FB
575static int mp3_write_header(struct AVFormatContext *s)
576{
0dc56bfa
577 int totlen = 0;
578 char tracktxt[10];
bd548b99 579 char yeartxt[10];
0dc56bfa
580
581 if(s->track)
d638424b 582 snprintf(tracktxt, sizeof(tracktxt), "%d", s->track);
bd548b99 583 if(s->year)
d638424b 584 snprintf( yeartxt, sizeof(yeartxt) , "%d", s->year );
0dc56bfa
585
586 if(s->title[0]) totlen += 11 + strlen(s->title);
587 if(s->author[0]) totlen += 11 + strlen(s->author);
588 if(s->album[0]) totlen += 11 + strlen(s->album);
589 if(s->genre[0]) totlen += 11 + strlen(s->genre);
590 if(s->copyright[0]) totlen += 11 + strlen(s->copyright);
591 if(s->track) totlen += 11 + strlen(tracktxt);
bd548b99 592 if(s->year) totlen += 11 + strlen(yeartxt);
0dc56bfa
593 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
594 totlen += strlen(LIBAVFORMAT_IDENT) + 11;
595
596 if(totlen == 0)
597 return 0;
598
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599 put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */
600 put_byte(s->pb, 0);
601 put_byte(s->pb, 0); /* flags */
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602
603 id3v2_put_size(s, totlen);
604
605 if(s->title[0]) id3v2_put_ttag(s, s->title, MKBETAG('T', 'I', 'T', '2'));
606 if(s->author[0]) id3v2_put_ttag(s, s->author, MKBETAG('T', 'P', 'E', '1'));
607 if(s->album[0]) id3v2_put_ttag(s, s->album, MKBETAG('T', 'A', 'L', 'B'));
608 if(s->genre[0]) id3v2_put_ttag(s, s->genre, MKBETAG('T', 'C', 'O', 'N'));
609 if(s->copyright[0]) id3v2_put_ttag(s, s->copyright, MKBETAG('T', 'C', 'O', 'P'));
610 if(s->track) id3v2_put_ttag(s, tracktxt, MKBETAG('T', 'R', 'C', 'K'));
bd548b99 611 if(s->year) id3v2_put_ttag(s, yeartxt, MKBETAG('T', 'Y', 'E', 'R'));
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612 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
613 id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C'));
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614 return 0;
615}
616
e928649b 617static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
6a58e151 618{
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619 put_buffer(s->pb, pkt->data, pkt->size);
620 put_flush_packet(s->pb);
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621 return 0;
622}
623
624static int mp3_write_trailer(struct AVFormatContext *s)
625{
cb2578d5 626 uint8_t buf[ID3v1_TAG_SIZE];
6a58e151 627
cb2578d5 628 /* write the id3v1 tag */
6a58e151 629 if (s->title[0] != '\0') {
cb2578d5 630 id3v1_create_tag(s, buf);
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631 put_buffer(s->pb, buf, ID3v1_TAG_SIZE);
632 put_flush_packet(s->pb);
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633 }
634 return 0;
635}
b250f9c6 636#endif /* CONFIG_MP2_MUXER || CONFIG_MP3_MUXER */
6a58e151 637
b250f9c6 638#if CONFIG_MP3_DEMUXER
d2a067d1 639AVInputFormat mp3_demuxer = {
6a58e151 640 "mp3",
bde15e74 641 NULL_IF_CONFIG_SMALL("MPEG audio"),
6a58e151 642 0,
dc4ed3b1 643 mp3_read_probe,
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644 mp3_read_header,
645 mp3_read_packet,
e9b78eeb 646 .flags= AVFMT_GENERIC_INDEX,
e0827ba4 647 .extensions = "mp2,mp3,m2a", /* XXX: use probe */
6a58e151 648};
ff70e601 649#endif
b250f9c6 650#if CONFIG_MP2_MUXER
d2a067d1 651AVOutputFormat mp2_muxer = {
6a58e151 652 "mp2",
bde15e74 653 NULL_IF_CONFIG_SMALL("MPEG audio layer 2"),
6a58e151 654 "audio/x-mpeg",
b250f9c6 655#if CONFIG_LIBMP3LAME
e0827ba4 656 "mp2,m2a",
6a58e151 657#else
e0827ba4 658 "mp2,mp3,m2a",
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659#endif
660 0,
661 CODEC_ID_MP2,
d9133126 662 CODEC_ID_NONE,
c6377f61 663 NULL,
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664 mp3_write_packet,
665 mp3_write_trailer,
666};
ff70e601 667#endif
b250f9c6 668#if CONFIG_MP3_MUXER
d2a067d1 669AVOutputFormat mp3_muxer = {
6a58e151 670 "mp3",
bde15e74 671 NULL_IF_CONFIG_SMALL("MPEG audio layer 3"),
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672 "audio/x-mpeg",
673 "mp3",
674 0,
675 CODEC_ID_MP3,
d9133126 676 CODEC_ID_NONE,
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677 mp3_write_header,
678 mp3_write_packet,
679 mp3_write_trailer,
680};
681#endif