Make the MP3 probe weakly claim all files with ID3v2 tags to fix regressions on
[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
9d98535c 170static void id3v2_read_ttag(AVFormatContext *s, int taglen, const char *key)
52b53f86 171{
9d98535c 172 char *q, dst[512];
3b1c4a06 173 int len, dstlen = sizeof(dst) - 1;
9d98535c 174 unsigned genre;
52b53f86 175
b3a9e50c 176 dst[0]= 0;
52b53f86
177 if(taglen < 1)
178 return;
179
180 taglen--; /* account for encoding type byte */
52b53f86 181
899681cd 182 switch(get_byte(s->pb)) { /* encoding type */
52b53f86
183
184 case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */
185 q = dst;
186 while(taglen--) {
187 uint8_t tmp;
899681cd 188 PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
52b53f86
189 }
190 *q = '\0';
191 break;
192
193 case 3: /* UTF-8 */
03289958 194 len = FFMIN(taglen, dstlen-1);
899681cd 195 get_buffer(s->pb, dst, len);
52b53f86
196 dst[len] = 0;
197 break;
198 }
9d98535c
AJ
199
200 if (!strcmp(key, "genre")
201 && sscanf(dst, "(%d)", &genre) == 1 && genre <= ID3v1_GENRE_MAX)
202 av_strlcpy(dst, id3v1_genre_str[genre], sizeof(dst));
203
204 if (*dst)
205 av_metadata_set(&s->metadata, key, dst);
52b53f86
206}
207
208/**
209 * ID3v2 parser
210 *
211 * Handles ID3v2.2, 2.3 and 2.4.
212 *
213 */
214
215static void id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
216{
217 int isv34, tlen;
218 uint32_t tag;
bc5c918e 219 int64_t next;
52b53f86
220 int taghdrlen;
221 const char *reason;
222
223 switch(version) {
224 case 2:
225 if(flags & 0x40) {
226 reason = "compression";
227 goto error;
228 }
229 isv34 = 0;
230 taghdrlen = 6;
231 break;
232
c21f308e
RS
233 case 3:
234 case 4:
52b53f86
235 isv34 = 1;
236 taghdrlen = 10;
237 break;
238
239 default:
240 reason = "version";
241 goto error;
242 }
243
244 if(flags & 0x80) {
245 reason = "unsynchronization";
246 goto error;
247 }
248
249 if(isv34 && flags & 0x40) /* Extended header present, just skip over it */
899681cd 250 url_fskip(s->pb, id3v2_get_size(s->pb, 4));
52b53f86
251
252 while(len >= taghdrlen) {
253 if(isv34) {
899681cd
BA
254 tag = get_be32(s->pb);
255 tlen = id3v2_get_size(s->pb, 4);
256 get_be16(s->pb); /* flags */
52b53f86 257 } else {
899681cd
BA
258 tag = get_be24(s->pb);
259 tlen = id3v2_get_size(s->pb, 3);
52b53f86
260 }
261 len -= taghdrlen + tlen;
262
263 if(len < 0)
264 break;
265
899681cd 266 next = url_ftell(s->pb) + tlen;
52b53f86
267
268 switch(tag) {
269 case MKBETAG('T', 'I', 'T', '2'):
270 case MKBETAG(0, 'T', 'T', '2'):
9d98535c 271 id3v2_read_ttag(s, tlen, "title");
52b53f86
272 break;
273 case MKBETAG('T', 'P', 'E', '1'):
274 case MKBETAG(0, 'T', 'P', '1'):
9d98535c 275 id3v2_read_ttag(s, tlen, "author");
52b53f86
276 break;
277 case MKBETAG('T', 'A', 'L', 'B'):
278 case MKBETAG(0, 'T', 'A', 'L'):
9d98535c 279 id3v2_read_ttag(s, tlen, "album");
52b53f86
280 break;
281 case MKBETAG('T', 'C', 'O', 'N'):
282 case MKBETAG(0, 'T', 'C', 'O'):
9d98535c 283 id3v2_read_ttag(s, tlen, "genre");
52b53f86
284 break;
285 case MKBETAG('T', 'C', 'O', 'P'):
286 case MKBETAG(0, 'T', 'C', 'R'):
9d98535c 287 id3v2_read_ttag(s, tlen, "copyright");
52b53f86
288 break;
289 case MKBETAG('T', 'R', 'C', 'K'):
290 case MKBETAG(0, 'T', 'R', 'K'):
9d98535c 291 id3v2_read_ttag(s, tlen, "track");
52b53f86
292 break;
293 case 0:
294 /* padding, skip to end */
899681cd 295 url_fskip(s->pb, len);
52b53f86
296 len = 0;
297 continue;
298 }
299 /* Skip to end of tag */
899681cd 300 url_fseek(s->pb, next, SEEK_SET);
52b53f86
301 }
302
303 if(version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
899681cd 304 url_fskip(s->pb, 10);
52b53f86
305 return;
306
307 error:
308 av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
899681cd 309 url_fskip(s->pb, len);
52b53f86
310}
311
9d98535c 312static void id3v1_get_string(AVFormatContext *s, const char *key,
cb2578d5 313 const uint8_t *buf, int buf_size)
6a58e151
FB
314{
315 int i, c;
9d98535c 316 char *q, str[512];
6a58e151
FB
317
318 q = str;
319 for(i = 0; i < buf_size; i++) {
320 c = buf[i];
321 if (c == '\0')
322 break;
9d98535c 323 if ((q - str) >= sizeof(str) - 1)
6a58e151
FB
324 break;
325 *q++ = c;
326 }
327 *q = '\0';
9d98535c
AJ
328
329 if (*str)
330 av_metadata_set(&s->metadata, key, str);
6a58e151
FB
331}
332
cb2578d5
333/* 'buf' must be ID3v1_TAG_SIZE byte long */
334static int id3v1_parse_tag(AVFormatContext *s, const uint8_t *buf)
6a58e151
FB
335{
336 char str[5];
337 int genre;
115329f1 338
6a58e151
FB
339 if (!(buf[0] == 'T' &&
340 buf[1] == 'A' &&
341 buf[2] == 'G'))
342 return -1;
9d98535c
AJ
343 id3v1_get_string(s, "title", buf + 3, 30);
344 id3v1_get_string(s, "author", buf + 33, 30);
345 id3v1_get_string(s, "album", buf + 63, 30);
346 id3v1_get_string(s, "year", buf + 93, 4);
347 id3v1_get_string(s, "comment", buf + 97, 30);
348 if (buf[125] == 0 && buf[126] != 0) {
349 snprintf(str, sizeof(str), "%d", buf[126]);
350 av_metadata_set(&s->metadata, "track", str);
351 }
6a58e151 352 genre = buf[127];
cb2578d5 353 if (genre <= ID3v1_GENRE_MAX)
9d98535c 354 av_metadata_set(&s->metadata, "genre", id3v1_genre_str[genre]);
6a58e151
FB
355 return 0;
356}
357
6a58e151 358/* mp3 read */
dc4ed3b1
MR
359
360static int mp3_read_probe(AVProbeData *p)
361{
ea7599ba 362 int max_frames, first_frames = 0;
498c544a 363 int fsize, frames, sample_rate;
abade142 364 uint32_t header;
ac3ef4a4 365 uint8_t *buf, *buf0, *buf2, *end;
abade142 366 AVCodecContext avctx;
dc4ed3b1 367
ac3ef4a4
AC
368 buf0 = p->buf;
369 if(ff_id3v2_match(buf0)) {
370 buf0 += ff_id3v2_tag_len(buf0);
371 }
dc4ed3b1 372
abade142 373 max_frames = 0;
ac3ef4a4 374 buf = buf0;
38cef584 375 end = p->buf + p->buf_size - sizeof(uint32_t);
dc4ed3b1 376
5ef5501b 377 for(; buf < end; buf= buf2+1) {
abade142 378 buf2 = buf;
dc4ed3b1 379
d0702de9 380 for(frames = 0; buf2 < end; frames++) {
80fb8234 381 header = AV_RB32(buf2);
c96bd212 382 fsize = ff_mpa_decode_header(&avctx, header, &sample_rate, &sample_rate, &sample_rate, &sample_rate);
abade142
383 if(fsize < 0)
384 break;
385 buf2 += fsize;
386 }
387 max_frames = FFMAX(max_frames, frames);
ac3ef4a4 388 if(buf == buf0)
22668218 389 first_frames= frames;
abade142 390 }
22668218 391 if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
2db97113 392 else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
22668218 393 else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
d0f89acf 394 else if(buf0!=p->buf) return AVPROBE_SCORE_MAX/4-1;
22668218 395 else if(max_frames>=1) return 1;
abade142 396 else return 0;
dc4ed3b1
MR
397}
398
ca851a3a 399/**
8862fb41 400 * Try to find Xing/Info/VBRI tags and compute duration from info therein
ca851a3a 401 */
853a9753 402static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
ca851a3a 403{
db233e83
404 uint32_t v, spf;
405 int frames = -1; /* Total number of frames in file */
bc5c918e 406 const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
cf92cec7 407 MPADecodeHeader c;
853a9753 408 int vbrtag_size = 0;
ca851a3a 409
899681cd 410 v = get_be32(s->pb);
5b5bd7c9 411 if(ff_mpa_check_header(v) < 0)
853a9753 412 return -1;
5b5bd7c9 413
853a9753
YS
414 if (ff_mpegaudio_decode_header(&c, v) == 0)
415 vbrtag_size = c.frame_size;
db233e83 416 if(c.layer != 3)
853a9753 417 return -1;
ca851a3a 418
db233e83 419 /* Check for Xing / Info tag */
899681cd
BA
420 url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
421 v = get_be32(s->pb);
db233e83 422 if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
899681cd 423 v = get_be32(s->pb);
478638ab 424 if(v & 0x1)
899681cd 425 frames = get_be32(s->pb);
ca851a3a 426 }
db233e83 427
8862fb41 428 /* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */
899681cd
BA
429 url_fseek(s->pb, base + 4 + 32, SEEK_SET);
430 v = get_be32(s->pb);
8862fb41
431 if(v == MKBETAG('V', 'B', 'R', 'I')) {
432 /* Check tag version */
899681cd 433 if(get_be16(s->pb) == 1) {
8862fb41 434 /* skip delay, quality and total bytes */
899681cd
BA
435 url_fseek(s->pb, 8, SEEK_CUR);
436 frames = get_be32(s->pb);
8862fb41
437 }
438 }
439
db233e83 440 if(frames < 0)
853a9753
YS
441 return -1;
442
443 /* Skip the vbr tag frame */
444 url_fseek(s->pb, base + vbrtag_size, SEEK_SET);
db233e83
445
446 spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
447 st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
448 st->time_base);
853a9753 449 return 0;
ca851a3a
450}
451
6a58e151
FB
452static int mp3_read_header(AVFormatContext *s,
453 AVFormatParameters *ap)
454{
455 AVStream *st;
cb2578d5 456 uint8_t buf[ID3v1_TAG_SIZE];
6a58e151 457 int len, ret, filesize;
bc5c918e 458 int64_t off;
6a58e151
FB
459
460 st = av_new_stream(s, 0);
461 if (!st)
769e10f0 462 return AVERROR(ENOMEM);
6a58e151 463
01f4895c
MN
464 st->codec->codec_type = CODEC_TYPE_AUDIO;
465 st->codec->codec_id = CODEC_ID_MP3;
57004ff1 466 st->need_parsing = AVSTREAM_PARSE_FULL;
f97931c1 467 st->start_time = 0;
115329f1 468
6a58e151 469 /* try to get the TAG */
899681cd 470 if (!url_is_streamed(s->pb)) {
6a58e151 471 /* XXX: change that */
899681cd 472 filesize = url_fsize(s->pb);
6a58e151 473 if (filesize > 128) {
899681cd
BA
474 url_fseek(s->pb, filesize - 128, SEEK_SET);
475 ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE);
cb2578d5
476 if (ret == ID3v1_TAG_SIZE) {
477 id3v1_parse_tag(s, buf);
6a58e151 478 }
899681cd 479 url_fseek(s->pb, 0, SEEK_SET);
6a58e151
FB
480 }
481 }
482
cb2578d5 483 /* if ID3v2 header found, skip it */
899681cd 484 ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
cb2578d5 485 if (ret != ID3v2_HEADER_SIZE)
6a58e151 486 return -1;
2ea512a6 487 if (ff_id3v2_match(buf)) {
52b53f86 488 /* parse ID3v2 header */
6a58e151
FB
489 len = ((buf[6] & 0x7f) << 21) |
490 ((buf[7] & 0x7f) << 14) |
491 ((buf[8] & 0x7f) << 7) |
492 (buf[9] & 0x7f);
52b53f86 493 id3v2_parse(s, len, buf[3], buf[5]);
6a58e151 494 } else {
899681cd 495 url_fseek(s->pb, 0, SEEK_SET);
6a58e151
FB
496 }
497
899681cd 498 off = url_ftell(s->pb);
853a9753
YS
499 if (mp3_parse_vbr_tags(s, st, off) < 0)
500 url_fseek(s->pb, off, SEEK_SET);
ca851a3a 501
6a58e151
FB
502 /* the parameters will be extracted from the compressed bitstream */
503 return 0;
504}
505
506#define MP3_PACKET_SIZE 1024
507
508static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
509{
510 int ret, size;
511 // AVStream *st = s->streams[0];
115329f1 512
6a58e151
FB
513 size= MP3_PACKET_SIZE;
514
899681cd 515 ret= av_get_packet(s->pb, pkt, size);
6a58e151
FB
516
517 pkt->stream_index = 0;
6a58e151 518 if (ret <= 0) {
6f3e0b21 519 return AVERROR(EIO);
6a58e151
FB
520 }
521 /* note: we need to modify the packet size here to handle the last
522 packet */
523 pkt->size = ret;
524 return ret;
525}
526
b250f9c6 527#if CONFIG_MP2_MUXER || CONFIG_MP3_MUXER
b182eeb0
AJ
528static int id3v1_set_string(AVFormatContext *s, const char *key,
529 uint8_t *buf, int buf_size)
58607ca7 530{
b182eeb0
AJ
531 AVMetadataTag *tag;
532 if ((tag = av_metadata_get(s->metadata, key, NULL, 0)))
533 strncpy(buf, tag->value, buf_size);
534 return !!tag;
535}
536
537static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
538{
539 AVMetadataTag *tag;
540 int i, count = 0;
58607ca7
DB
541
542 memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */
543 buf[0] = 'T';
544 buf[1] = 'A';
545 buf[2] = 'G';
b182eeb0
AJ
546 count += id3v1_set_string(s, "title", buf + 3, 30);
547 count += id3v1_set_string(s, "author", buf + 33, 30);
548 count += id3v1_set_string(s, "album", buf + 63, 30);
549 count += id3v1_set_string(s, "year", buf + 93, 4);
550 count += id3v1_set_string(s, "comment", buf + 97, 30);
551 if ((tag = av_metadata_get(s->metadata, "track", NULL, 0))) {
58607ca7 552 buf[125] = 0;
b182eeb0
AJ
553 buf[126] = atoi(tag->value);
554 count++;
58607ca7 555 }
b182eeb0 556 if ((tag = av_metadata_get(s->metadata, "genre", NULL, 0))) {
ee56cab3
AJ
557 for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
558 if (!strcasecmp(tag->value, id3v1_genre_str[i])) {
559 buf[127] = i;
560 count++;
561 break;
562 }
58607ca7
DB
563 }
564 }
b182eeb0 565 return count;
58607ca7
DB
566}
567
6a58e151 568/* simple formats */
0dc56bfa
569
570static void id3v2_put_size(AVFormatContext *s, int size)
571{
899681cd
BA
572 put_byte(s->pb, size >> 21 & 0x7f);
573 put_byte(s->pb, size >> 14 & 0x7f);
574 put_byte(s->pb, size >> 7 & 0x7f);
575 put_byte(s->pb, size & 0x7f);
0dc56bfa
576}
577
8df94c73 578static void id3v2_put_ttag(AVFormatContext *s, const char *string, uint32_t tag)
0dc56bfa
579{
580 int len = strlen(string);
899681cd 581 put_be32(s->pb, tag);
0dc56bfa 582 id3v2_put_size(s, len + 1);
899681cd
BA
583 put_be16(s->pb, 0);
584 put_byte(s->pb, 3); /* UTF-8 */
585 put_buffer(s->pb, string, len);
0dc56bfa
586}
587
588
589/**
590 * Write an ID3v2.4 header at beginning of stream
591 */
592
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593static int mp3_write_header(struct AVFormatContext *s)
594{
b182eeb0 595 AVMetadataTag *title, *author, *album, *genre, *copyright, *track, *year;
0dc56bfa 596 int totlen = 0;
b182eeb0
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597
598 title = av_metadata_get(s->metadata, "title", NULL, 0);
599 author = av_metadata_get(s->metadata, "author", NULL, 0);
600 album = av_metadata_get(s->metadata, "album", NULL, 0);
601 genre = av_metadata_get(s->metadata, "genre", NULL, 0);
602 copyright = av_metadata_get(s->metadata, "copyright", NULL, 0);
603 track = av_metadata_get(s->metadata, "track", NULL, 0);
604 year = av_metadata_get(s->metadata, "year", NULL, 0);
605
606 if(title) totlen += 11 + strlen(title->value);
607 if(author) totlen += 11 + strlen(author->value);
608 if(album) totlen += 11 + strlen(album->value);
609 if(genre) totlen += 11 + strlen(genre->value);
610 if(copyright) totlen += 11 + strlen(copyright->value);
611 if(track) totlen += 11 + strlen(track->value);
612 if(year) totlen += 11 + strlen(year->value);
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613 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
614 totlen += strlen(LIBAVFORMAT_IDENT) + 11;
615
616 if(totlen == 0)
617 return 0;
618
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619 put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */
620 put_byte(s->pb, 0);
621 put_byte(s->pb, 0); /* flags */
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622
623 id3v2_put_size(s, totlen);
624
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625 if(title) id3v2_put_ttag(s, title->value, MKBETAG('T', 'I', 'T', '2'));
626 if(author) id3v2_put_ttag(s, author->value, MKBETAG('T', 'P', 'E', '1'));
627 if(album) id3v2_put_ttag(s, album->value, MKBETAG('T', 'A', 'L', 'B'));
628 if(genre) id3v2_put_ttag(s, genre->value, MKBETAG('T', 'C', 'O', 'N'));
629 if(copyright) id3v2_put_ttag(s, copyright->value, MKBETAG('T', 'C', 'O', 'P'));
630 if(track) id3v2_put_ttag(s, track->value, MKBETAG('T', 'R', 'C', 'K'));
631 if(year) id3v2_put_ttag(s, year->value, MKBETAG('T', 'Y', 'E', 'R'));
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632 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
633 id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C'));
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634 return 0;
635}
636
e928649b 637static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
6a58e151 638{
899681cd
BA
639 put_buffer(s->pb, pkt->data, pkt->size);
640 put_flush_packet(s->pb);
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641 return 0;
642}
643
644static int mp3_write_trailer(struct AVFormatContext *s)
645{
cb2578d5 646 uint8_t buf[ID3v1_TAG_SIZE];
6a58e151 647
cb2578d5 648 /* write the id3v1 tag */
b182eeb0 649 if (id3v1_create_tag(s, buf) > 0) {
899681cd
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650 put_buffer(s->pb, buf, ID3v1_TAG_SIZE);
651 put_flush_packet(s->pb);
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652 }
653 return 0;
654}
b250f9c6 655#endif /* CONFIG_MP2_MUXER || CONFIG_MP3_MUXER */
6a58e151 656
b250f9c6 657#if CONFIG_MP3_DEMUXER
d2a067d1 658AVInputFormat mp3_demuxer = {
6a58e151 659 "mp3",
bde15e74 660 NULL_IF_CONFIG_SMALL("MPEG audio"),
6a58e151 661 0,
dc4ed3b1 662 mp3_read_probe,
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663 mp3_read_header,
664 mp3_read_packet,
e9b78eeb 665 .flags= AVFMT_GENERIC_INDEX,
e0827ba4 666 .extensions = "mp2,mp3,m2a", /* XXX: use probe */
6a58e151 667};
ff70e601 668#endif
b250f9c6 669#if CONFIG_MP2_MUXER
d2a067d1 670AVOutputFormat mp2_muxer = {
6a58e151 671 "mp2",
bde15e74 672 NULL_IF_CONFIG_SMALL("MPEG audio layer 2"),
6a58e151 673 "audio/x-mpeg",
e0827ba4 674 "mp2,m2a",
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675 0,
676 CODEC_ID_MP2,
d9133126 677 CODEC_ID_NONE,
c6377f61 678 NULL,
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679 mp3_write_packet,
680 mp3_write_trailer,
681};
ff70e601 682#endif
b250f9c6 683#if CONFIG_MP3_MUXER
d2a067d1 684AVOutputFormat mp3_muxer = {
6a58e151 685 "mp3",
bde15e74 686 NULL_IF_CONFIG_SMALL("MPEG audio layer 3"),
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687 "audio/x-mpeg",
688 "mp3",
689 0,
690 CODEC_ID_MP3,
d9133126 691 CODEC_ID_NONE,
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692 mp3_write_header,
693 mp3_write_packet,
694 mp3_write_trailer,
695};
696#endif