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00022 #include <strings.h>
00023 #include "libavutil/avstring.h"
00024 #include "libavcodec/mpegaudio.h"
00025 #include "libavcodec/mpegaudiodecheader.h"
00026 #include "avformat.h"
00027 #include "id3v2.h"
00028
00029 #define ID3v1_TAG_SIZE 128
00030
00031 #define ID3v1_GENRE_MAX 125
00032
00033 static const char * const id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
00034 [0] = "Blues",
00035 [1] = "Classic Rock",
00036 [2] = "Country",
00037 [3] = "Dance",
00038 [4] = "Disco",
00039 [5] = "Funk",
00040 [6] = "Grunge",
00041 [7] = "Hip-Hop",
00042 [8] = "Jazz",
00043 [9] = "Metal",
00044 [10] = "New Age",
00045 [11] = "Oldies",
00046 [12] = "Other",
00047 [13] = "Pop",
00048 [14] = "R&B",
00049 [15] = "Rap",
00050 [16] = "Reggae",
00051 [17] = "Rock",
00052 [18] = "Techno",
00053 [19] = "Industrial",
00054 [20] = "Alternative",
00055 [21] = "Ska",
00056 [22] = "Death Metal",
00057 [23] = "Pranks",
00058 [24] = "Soundtrack",
00059 [25] = "Euro-Techno",
00060 [26] = "Ambient",
00061 [27] = "Trip-Hop",
00062 [28] = "Vocal",
00063 [29] = "Jazz+Funk",
00064 [30] = "Fusion",
00065 [31] = "Trance",
00066 [32] = "Classical",
00067 [33] = "Instrumental",
00068 [34] = "Acid",
00069 [35] = "House",
00070 [36] = "Game",
00071 [37] = "Sound Clip",
00072 [38] = "Gospel",
00073 [39] = "Noise",
00074 [40] = "AlternRock",
00075 [41] = "Bass",
00076 [42] = "Soul",
00077 [43] = "Punk",
00078 [44] = "Space",
00079 [45] = "Meditative",
00080 [46] = "Instrumental Pop",
00081 [47] = "Instrumental Rock",
00082 [48] = "Ethnic",
00083 [49] = "Gothic",
00084 [50] = "Darkwave",
00085 [51] = "Techno-Industrial",
00086 [52] = "Electronic",
00087 [53] = "Pop-Folk",
00088 [54] = "Eurodance",
00089 [55] = "Dream",
00090 [56] = "Southern Rock",
00091 [57] = "Comedy",
00092 [58] = "Cult",
00093 [59] = "Gangsta",
00094 [60] = "Top 40",
00095 [61] = "Christian Rap",
00096 [62] = "Pop/Funk",
00097 [63] = "Jungle",
00098 [64] = "Native American",
00099 [65] = "Cabaret",
00100 [66] = "New Wave",
00101 [67] = "Psychadelic",
00102 [68] = "Rave",
00103 [69] = "Showtunes",
00104 [70] = "Trailer",
00105 [71] = "Lo-Fi",
00106 [72] = "Tribal",
00107 [73] = "Acid Punk",
00108 [74] = "Acid Jazz",
00109 [75] = "Polka",
00110 [76] = "Retro",
00111 [77] = "Musical",
00112 [78] = "Rock & Roll",
00113 [79] = "Hard Rock",
00114 [80] = "Folk",
00115 [81] = "Folk-Rock",
00116 [82] = "National Folk",
00117 [83] = "Swing",
00118 [84] = "Fast Fusion",
00119 [85] = "Bebob",
00120 [86] = "Latin",
00121 [87] = "Revival",
00122 [88] = "Celtic",
00123 [89] = "Bluegrass",
00124 [90] = "Avantgarde",
00125 [91] = "Gothic Rock",
00126 [92] = "Progressive Rock",
00127 [93] = "Psychedelic Rock",
00128 [94] = "Symphonic Rock",
00129 [95] = "Slow Rock",
00130 [96] = "Big Band",
00131 [97] = "Chorus",
00132 [98] = "Easy Listening",
00133 [99] = "Acoustic",
00134 [100] = "Humour",
00135 [101] = "Speech",
00136 [102] = "Chanson",
00137 [103] = "Opera",
00138 [104] = "Chamber Music",
00139 [105] = "Sonata",
00140 [106] = "Symphony",
00141 [107] = "Booty Bass",
00142 [108] = "Primus",
00143 [109] = "Porn Groove",
00144 [110] = "Satire",
00145 [111] = "Slow Jam",
00146 [112] = "Club",
00147 [113] = "Tango",
00148 [114] = "Samba",
00149 [115] = "Folklore",
00150 [116] = "Ballad",
00151 [117] = "Power Ballad",
00152 [118] = "Rhythmic Soul",
00153 [119] = "Freestyle",
00154 [120] = "Duet",
00155 [121] = "Punk Rock",
00156 [122] = "Drum Solo",
00157 [123] = "A capella",
00158 [124] = "Euro-House",
00159 [125] = "Dance Hall",
00160 };
00161
00162 static unsigned int id3v2_get_size(ByteIOContext *s, int len)
00163 {
00164 int v=0;
00165 while(len--)
00166 v= (v<<7) + (get_byte(s)&0x7F);
00167 return v;
00168 }
00169
00170 static void id3v2_read_ttag(AVFormatContext *s, int taglen, const char *key)
00171 {
00172 char *q, dst[512];
00173 int len, dstlen = sizeof(dst) - 1;
00174 unsigned genre;
00175
00176 dst[0]= 0;
00177 if(taglen < 1)
00178 return;
00179
00180 taglen--;
00181
00182 switch(get_byte(s->pb)) {
00183
00184 case 0:
00185 q = dst;
00186 while(taglen--) {
00187 uint8_t tmp;
00188 PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
00189 }
00190 *q = '\0';
00191 break;
00192
00193 case 3:
00194 len = FFMIN(taglen, dstlen-1);
00195 get_buffer(s->pb, dst, len);
00196 dst[len] = 0;
00197 break;
00198 }
00199
00200 if (!strcmp(key, "genre")
00201 && sscanf(dst, "(%d)", &genre) == 1 && genre <= ID3v1_GENRE_MAX)
00202 av_strlcpy(dst, id3v1_genre_str[genre], sizeof(dst));
00203
00204 if (*dst)
00205 av_metadata_set(&s->metadata, key, dst);
00206 }
00207
00215 static void id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
00216 {
00217 int isv34, tlen;
00218 uint32_t tag;
00219 int64_t next;
00220 int taghdrlen;
00221 const char *reason;
00222
00223 switch(version) {
00224 case 2:
00225 if(flags & 0x40) {
00226 reason = "compression";
00227 goto error;
00228 }
00229 isv34 = 0;
00230 taghdrlen = 6;
00231 break;
00232
00233 case 3:
00234 case 4:
00235 isv34 = 1;
00236 taghdrlen = 10;
00237 break;
00238
00239 default:
00240 reason = "version";
00241 goto error;
00242 }
00243
00244 if(flags & 0x80) {
00245 reason = "unsynchronization";
00246 goto error;
00247 }
00248
00249 if(isv34 && flags & 0x40)
00250 url_fskip(s->pb, id3v2_get_size(s->pb, 4));
00251
00252 while(len >= taghdrlen) {
00253 if(isv34) {
00254 tag = get_be32(s->pb);
00255 tlen = id3v2_get_size(s->pb, 4);
00256 get_be16(s->pb);
00257 } else {
00258 tag = get_be24(s->pb);
00259 tlen = id3v2_get_size(s->pb, 3);
00260 }
00261 len -= taghdrlen + tlen;
00262
00263 if(len < 0)
00264 break;
00265
00266 next = url_ftell(s->pb) + tlen;
00267
00268 switch(tag) {
00269 case MKBETAG('T', 'I', 'T', '2'):
00270 case MKBETAG(0, 'T', 'T', '2'):
00271 id3v2_read_ttag(s, tlen, "title");
00272 break;
00273 case MKBETAG('T', 'P', 'E', '1'):
00274 case MKBETAG(0, 'T', 'P', '1'):
00275 id3v2_read_ttag(s, tlen, "author");
00276 break;
00277 case MKBETAG('T', 'A', 'L', 'B'):
00278 case MKBETAG(0, 'T', 'A', 'L'):
00279 id3v2_read_ttag(s, tlen, "album");
00280 break;
00281 case MKBETAG('T', 'C', 'O', 'N'):
00282 case MKBETAG(0, 'T', 'C', 'O'):
00283 id3v2_read_ttag(s, tlen, "genre");
00284 break;
00285 case MKBETAG('T', 'C', 'O', 'P'):
00286 case MKBETAG(0, 'T', 'C', 'R'):
00287 id3v2_read_ttag(s, tlen, "copyright");
00288 break;
00289 case MKBETAG('T', 'R', 'C', 'K'):
00290 case MKBETAG(0, 'T', 'R', 'K'):
00291 id3v2_read_ttag(s, tlen, "track");
00292 break;
00293 case 0:
00294
00295 url_fskip(s->pb, len);
00296 len = 0;
00297 continue;
00298 }
00299
00300 url_fseek(s->pb, next, SEEK_SET);
00301 }
00302
00303 if(version == 4 && flags & 0x10)
00304 url_fskip(s->pb, 10);
00305 return;
00306
00307 error:
00308 av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
00309 url_fskip(s->pb, len);
00310 }
00311
00312 static void id3v1_get_string(AVFormatContext *s, const char *key,
00313 const uint8_t *buf, int buf_size)
00314 {
00315 int i, c;
00316 char *q, str[512];
00317
00318 q = str;
00319 for(i = 0; i < buf_size; i++) {
00320 c = buf[i];
00321 if (c == '\0')
00322 break;
00323 if ((q - str) >= sizeof(str) - 1)
00324 break;
00325 *q++ = c;
00326 }
00327 *q = '\0';
00328
00329 if (*str)
00330 av_metadata_set(&s->metadata, key, str);
00331 }
00332
00333
00334 static int id3v1_parse_tag(AVFormatContext *s, const uint8_t *buf)
00335 {
00336 char str[5];
00337 int genre;
00338
00339 if (!(buf[0] == 'T' &&
00340 buf[1] == 'A' &&
00341 buf[2] == 'G'))
00342 return -1;
00343 id3v1_get_string(s, "title", buf + 3, 30);
00344 id3v1_get_string(s, "author", buf + 33, 30);
00345 id3v1_get_string(s, "album", buf + 63, 30);
00346 id3v1_get_string(s, "year", buf + 93, 4);
00347 id3v1_get_string(s, "comment", buf + 97, 30);
00348 if (buf[125] == 0 && buf[126] != 0) {
00349 snprintf(str, sizeof(str), "%d", buf[126]);
00350 av_metadata_set(&s->metadata, "track", str);
00351 }
00352 genre = buf[127];
00353 if (genre <= ID3v1_GENRE_MAX)
00354 av_metadata_set(&s->metadata, "genre", id3v1_genre_str[genre]);
00355 return 0;
00356 }
00357
00358
00359
00360 static int mp3_read_probe(AVProbeData *p)
00361 {
00362 int max_frames, first_frames = 0;
00363 int fsize, frames, sample_rate;
00364 uint32_t header;
00365 uint8_t *buf, *buf0, *buf2, *end;
00366 AVCodecContext avctx;
00367
00368 buf0 = p->buf;
00369 if(ff_id3v2_match(buf0)) {
00370 buf0 += ff_id3v2_tag_len(buf0);
00371 }
00372
00373 max_frames = 0;
00374 buf = buf0;
00375 end = p->buf + p->buf_size - sizeof(uint32_t);
00376
00377 for(; buf < end; buf= buf2+1) {
00378 buf2 = buf;
00379
00380 for(frames = 0; buf2 < end; frames++) {
00381 header = AV_RB32(buf2);
00382 fsize = ff_mpa_decode_header(&avctx, header, &sample_rate, &sample_rate, &sample_rate, &sample_rate);
00383 if(fsize < 0)
00384 break;
00385 buf2 += fsize;
00386 }
00387 max_frames = FFMAX(max_frames, frames);
00388 if(buf == buf0)
00389 first_frames= frames;
00390 }
00391 if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
00392 else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
00393 else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
00394 else if(buf0!=p->buf) return AVPROBE_SCORE_MAX/4-1;
00395 else if(max_frames>=1) return 1;
00396 else return 0;
00397 }
00398
00402 static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
00403 {
00404 uint32_t v, spf;
00405 int frames = -1;
00406 const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
00407 MPADecodeHeader c;
00408 int vbrtag_size = 0;
00409
00410 v = get_be32(s->pb);
00411 if(ff_mpa_check_header(v) < 0)
00412 return -1;
00413
00414 if (ff_mpegaudio_decode_header(&c, v) == 0)
00415 vbrtag_size = c.frame_size;
00416 if(c.layer != 3)
00417 return -1;
00418
00419
00420 url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
00421 v = get_be32(s->pb);
00422 if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
00423 v = get_be32(s->pb);
00424 if(v & 0x1)
00425 frames = get_be32(s->pb);
00426 }
00427
00428
00429 url_fseek(s->pb, base + 4 + 32, SEEK_SET);
00430 v = get_be32(s->pb);
00431 if(v == MKBETAG('V', 'B', 'R', 'I')) {
00432
00433 if(get_be16(s->pb) == 1) {
00434
00435 url_fseek(s->pb, 8, SEEK_CUR);
00436 frames = get_be32(s->pb);
00437 }
00438 }
00439
00440 if(frames < 0)
00441 return -1;
00442
00443
00444 url_fseek(s->pb, base + vbrtag_size, SEEK_SET);
00445
00446 spf = c.lsf ? 576 : 1152;
00447 st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
00448 st->time_base);
00449 return 0;
00450 }
00451
00452 static int mp3_read_header(AVFormatContext *s,
00453 AVFormatParameters *ap)
00454 {
00455 AVStream *st;
00456 uint8_t buf[ID3v1_TAG_SIZE];
00457 int len, ret, filesize;
00458 int64_t off;
00459
00460 st = av_new_stream(s, 0);
00461 if (!st)
00462 return AVERROR(ENOMEM);
00463
00464 st->codec->codec_type = CODEC_TYPE_AUDIO;
00465 st->codec->codec_id = CODEC_ID_MP3;
00466 st->need_parsing = AVSTREAM_PARSE_FULL;
00467 st->start_time = 0;
00468
00469
00470 if (!url_is_streamed(s->pb)) {
00471
00472 filesize = url_fsize(s->pb);
00473 if (filesize > 128) {
00474 url_fseek(s->pb, filesize - 128, SEEK_SET);
00475 ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE);
00476 if (ret == ID3v1_TAG_SIZE) {
00477 id3v1_parse_tag(s, buf);
00478 }
00479 url_fseek(s->pb, 0, SEEK_SET);
00480 }
00481 }
00482
00483
00484 ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
00485 if (ret != ID3v2_HEADER_SIZE)
00486 return -1;
00487 if (ff_id3v2_match(buf)) {
00488
00489 len = ((buf[6] & 0x7f) << 21) |
00490 ((buf[7] & 0x7f) << 14) |
00491 ((buf[8] & 0x7f) << 7) |
00492 (buf[9] & 0x7f);
00493 id3v2_parse(s, len, buf[3], buf[5]);
00494 } else {
00495 url_fseek(s->pb, 0, SEEK_SET);
00496 }
00497
00498 off = url_ftell(s->pb);
00499 if (mp3_parse_vbr_tags(s, st, off) < 0)
00500 url_fseek(s->pb, off, SEEK_SET);
00501
00502
00503 return 0;
00504 }
00505
00506 #define MP3_PACKET_SIZE 1024
00507
00508 static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
00509 {
00510 int ret, size;
00511
00512
00513 size= MP3_PACKET_SIZE;
00514
00515 ret= av_get_packet(s->pb, pkt, size);
00516
00517 pkt->stream_index = 0;
00518 if (ret <= 0) {
00519 return AVERROR(EIO);
00520 }
00521
00522
00523 pkt->size = ret;
00524 return ret;
00525 }
00526
00527 #if CONFIG_MP2_MUXER || CONFIG_MP3_MUXER
00528 static int id3v1_set_string(AVFormatContext *s, const char *key,
00529 uint8_t *buf, int buf_size)
00530 {
00531 AVMetadataTag *tag;
00532 if ((tag = av_metadata_get(s->metadata, key, NULL, 0)))
00533 strncpy(buf, tag->value, buf_size);
00534 return !!tag;
00535 }
00536
00537 static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
00538 {
00539 AVMetadataTag *tag;
00540 int i, count = 0;
00541
00542 memset(buf, 0, ID3v1_TAG_SIZE);
00543 buf[0] = 'T';
00544 buf[1] = 'A';
00545 buf[2] = 'G';
00546 count += id3v1_set_string(s, "title", buf + 3, 30);
00547 count += id3v1_set_string(s, "author", buf + 33, 30);
00548 count += id3v1_set_string(s, "album", buf + 63, 30);
00549 count += id3v1_set_string(s, "year", buf + 93, 4);
00550 count += id3v1_set_string(s, "comment", buf + 97, 30);
00551 if ((tag = av_metadata_get(s->metadata, "track", NULL, 0))) {
00552 buf[125] = 0;
00553 buf[126] = atoi(tag->value);
00554 count++;
00555 }
00556 if ((tag = av_metadata_get(s->metadata, "genre", NULL, 0))) {
00557 for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
00558 if (!strcasecmp(tag->value, id3v1_genre_str[i])) {
00559 buf[127] = i;
00560 count++;
00561 break;
00562 }
00563 }
00564 }
00565 return count;
00566 }
00567
00568
00569
00570 static void id3v2_put_size(AVFormatContext *s, int size)
00571 {
00572 put_byte(s->pb, size >> 21 & 0x7f);
00573 put_byte(s->pb, size >> 14 & 0x7f);
00574 put_byte(s->pb, size >> 7 & 0x7f);
00575 put_byte(s->pb, size & 0x7f);
00576 }
00577
00578 static void id3v2_put_ttag(AVFormatContext *s, const char *string, uint32_t tag)
00579 {
00580 int len = strlen(string);
00581 put_be32(s->pb, tag);
00582 id3v2_put_size(s, len + 1);
00583 put_be16(s->pb, 0);
00584 put_byte(s->pb, 3);
00585 put_buffer(s->pb, string, len);
00586 }
00587
00588
00593 static int mp3_write_header(struct AVFormatContext *s)
00594 {
00595 AVMetadataTag *title, *author, *album, *genre, *copyright, *track, *year;
00596 int totlen = 0;
00597
00598 title = av_metadata_get(s->metadata, "title", NULL, 0);
00599 author = av_metadata_get(s->metadata, "author", NULL, 0);
00600 album = av_metadata_get(s->metadata, "album", NULL, 0);
00601 genre = av_metadata_get(s->metadata, "genre", NULL, 0);
00602 copyright = av_metadata_get(s->metadata, "copyright", NULL, 0);
00603 track = av_metadata_get(s->metadata, "track", NULL, 0);
00604 year = av_metadata_get(s->metadata, "year", NULL, 0);
00605
00606 if(title) totlen += 11 + strlen(title->value);
00607 if(author) totlen += 11 + strlen(author->value);
00608 if(album) totlen += 11 + strlen(album->value);
00609 if(genre) totlen += 11 + strlen(genre->value);
00610 if(copyright) totlen += 11 + strlen(copyright->value);
00611 if(track) totlen += 11 + strlen(track->value);
00612 if(year) totlen += 11 + strlen(year->value);
00613 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
00614 totlen += strlen(LIBAVFORMAT_IDENT) + 11;
00615
00616 if(totlen == 0)
00617 return 0;
00618
00619 put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04));
00620 put_byte(s->pb, 0);
00621 put_byte(s->pb, 0);
00622
00623 id3v2_put_size(s, totlen);
00624
00625 if(title) id3v2_put_ttag(s, title->value, MKBETAG('T', 'I', 'T', '2'));
00626 if(author) id3v2_put_ttag(s, author->value, MKBETAG('T', 'P', 'E', '1'));
00627 if(album) id3v2_put_ttag(s, album->value, MKBETAG('T', 'A', 'L', 'B'));
00628 if(genre) id3v2_put_ttag(s, genre->value, MKBETAG('T', 'C', 'O', 'N'));
00629 if(copyright) id3v2_put_ttag(s, copyright->value, MKBETAG('T', 'C', 'O', 'P'));
00630 if(track) id3v2_put_ttag(s, track->value, MKBETAG('T', 'R', 'C', 'K'));
00631 if(year) id3v2_put_ttag(s, year->value, MKBETAG('T', 'Y', 'E', 'R'));
00632 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
00633 id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C'));
00634 return 0;
00635 }
00636
00637 static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
00638 {
00639 put_buffer(s->pb, pkt->data, pkt->size);
00640 put_flush_packet(s->pb);
00641 return 0;
00642 }
00643
00644 static int mp3_write_trailer(struct AVFormatContext *s)
00645 {
00646 uint8_t buf[ID3v1_TAG_SIZE];
00647
00648
00649 if (id3v1_create_tag(s, buf) > 0) {
00650 put_buffer(s->pb, buf, ID3v1_TAG_SIZE);
00651 put_flush_packet(s->pb);
00652 }
00653 return 0;
00654 }
00655 #endif
00656
00657 #if CONFIG_MP3_DEMUXER
00658 AVInputFormat mp3_demuxer = {
00659 "mp3",
00660 NULL_IF_CONFIG_SMALL("MPEG audio layer 2/3"),
00661 0,
00662 mp3_read_probe,
00663 mp3_read_header,
00664 mp3_read_packet,
00665 .flags= AVFMT_GENERIC_INDEX,
00666 .extensions = "mp2,mp3,m2a",
00667 };
00668 #endif
00669 #if CONFIG_MP2_MUXER
00670 AVOutputFormat mp2_muxer = {
00671 "mp2",
00672 NULL_IF_CONFIG_SMALL("MPEG audio layer 2"),
00673 "audio/x-mpeg",
00674 "mp2,m2a",
00675 0,
00676 CODEC_ID_MP2,
00677 CODEC_ID_NONE,
00678 NULL,
00679 mp3_write_packet,
00680 mp3_write_trailer,
00681 };
00682 #endif
00683 #if CONFIG_MP3_MUXER
00684 AVOutputFormat mp3_muxer = {
00685 "mp3",
00686 NULL_IF_CONFIG_SMALL("MPEG audio layer 3"),
00687 "audio/x-mpeg",
00688 "mp3",
00689 0,
00690 CODEC_ID_MP3,
00691 CODEC_ID_NONE,
00692 mp3_write_header,
00693 mp3_write_packet,
00694 mp3_write_trailer,
00695 };
00696 #endif