| /* |
| * MP3 muxer and demuxer |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <strings.h> |
| #include "libavutil/avstring.h" |
| #include "libavcodec/mpegaudio.h" |
| #include "libavcodec/mpegaudiodecheader.h" |
| #include "avformat.h" |
| #include "id3v2.h" |
| |
| #define ID3v1_TAG_SIZE 128 |
| |
| #define ID3v1_GENRE_MAX 125 |
| |
| static const char * const id3v1_genre_str[ID3v1_GENRE_MAX + 1] = { |
| [0] = "Blues", |
| [1] = "Classic Rock", |
| [2] = "Country", |
| [3] = "Dance", |
| [4] = "Disco", |
| [5] = "Funk", |
| [6] = "Grunge", |
| [7] = "Hip-Hop", |
| [8] = "Jazz", |
| [9] = "Metal", |
| [10] = "New Age", |
| [11] = "Oldies", |
| [12] = "Other", |
| [13] = "Pop", |
| [14] = "R&B", |
| [15] = "Rap", |
| [16] = "Reggae", |
| [17] = "Rock", |
| [18] = "Techno", |
| [19] = "Industrial", |
| [20] = "Alternative", |
| [21] = "Ska", |
| [22] = "Death Metal", |
| [23] = "Pranks", |
| [24] = "Soundtrack", |
| [25] = "Euro-Techno", |
| [26] = "Ambient", |
| [27] = "Trip-Hop", |
| [28] = "Vocal", |
| [29] = "Jazz+Funk", |
| [30] = "Fusion", |
| [31] = "Trance", |
| [32] = "Classical", |
| [33] = "Instrumental", |
| [34] = "Acid", |
| [35] = "House", |
| [36] = "Game", |
| [37] = "Sound Clip", |
| [38] = "Gospel", |
| [39] = "Noise", |
| [40] = "AlternRock", |
| [41] = "Bass", |
| [42] = "Soul", |
| [43] = "Punk", |
| [44] = "Space", |
| [45] = "Meditative", |
| [46] = "Instrumental Pop", |
| [47] = "Instrumental Rock", |
| [48] = "Ethnic", |
| [49] = "Gothic", |
| [50] = "Darkwave", |
| [51] = "Techno-Industrial", |
| [52] = "Electronic", |
| [53] = "Pop-Folk", |
| [54] = "Eurodance", |
| [55] = "Dream", |
| [56] = "Southern Rock", |
| [57] = "Comedy", |
| [58] = "Cult", |
| [59] = "Gangsta", |
| [60] = "Top 40", |
| [61] = "Christian Rap", |
| [62] = "Pop/Funk", |
| [63] = "Jungle", |
| [64] = "Native American", |
| [65] = "Cabaret", |
| [66] = "New Wave", |
| [67] = "Psychadelic", |
| [68] = "Rave", |
| [69] = "Showtunes", |
| [70] = "Trailer", |
| [71] = "Lo-Fi", |
| [72] = "Tribal", |
| [73] = "Acid Punk", |
| [74] = "Acid Jazz", |
| [75] = "Polka", |
| [76] = "Retro", |
| [77] = "Musical", |
| [78] = "Rock & Roll", |
| [79] = "Hard Rock", |
| [80] = "Folk", |
| [81] = "Folk-Rock", |
| [82] = "National Folk", |
| [83] = "Swing", |
| [84] = "Fast Fusion", |
| [85] = "Bebob", |
| [86] = "Latin", |
| [87] = "Revival", |
| [88] = "Celtic", |
| [89] = "Bluegrass", |
| [90] = "Avantgarde", |
| [91] = "Gothic Rock", |
| [92] = "Progressive Rock", |
| [93] = "Psychedelic Rock", |
| [94] = "Symphonic Rock", |
| [95] = "Slow Rock", |
| [96] = "Big Band", |
| [97] = "Chorus", |
| [98] = "Easy Listening", |
| [99] = "Acoustic", |
| [100] = "Humour", |
| [101] = "Speech", |
| [102] = "Chanson", |
| [103] = "Opera", |
| [104] = "Chamber Music", |
| [105] = "Sonata", |
| [106] = "Symphony", |
| [107] = "Booty Bass", |
| [108] = "Primus", |
| [109] = "Porn Groove", |
| [110] = "Satire", |
| [111] = "Slow Jam", |
| [112] = "Club", |
| [113] = "Tango", |
| [114] = "Samba", |
| [115] = "Folklore", |
| [116] = "Ballad", |
| [117] = "Power Ballad", |
| [118] = "Rhythmic Soul", |
| [119] = "Freestyle", |
| [120] = "Duet", |
| [121] = "Punk Rock", |
| [122] = "Drum Solo", |
| [123] = "A capella", |
| [124] = "Euro-House", |
| [125] = "Dance Hall", |
| }; |
| |
| static unsigned int id3v2_get_size(ByteIOContext *s, int len) |
| { |
| int v=0; |
| while(len--) |
| v= (v<<7) + (get_byte(s)&0x7F); |
| return v; |
| } |
| |
| static void id3v2_read_ttag(AVFormatContext *s, int taglen, const char *key) |
| { |
| char *q, dst[512]; |
| int len, dstlen = sizeof(dst) - 1; |
| unsigned genre; |
| |
| dst[0]= 0; |
| if(taglen < 1) |
| return; |
| |
| taglen--; /* account for encoding type byte */ |
| |
| switch(get_byte(s->pb)) { /* encoding type */ |
| |
| case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */ |
| q = dst; |
| while(taglen--) { |
| uint8_t tmp; |
| PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;) |
| } |
| *q = '\0'; |
| break; |
| |
| case 3: /* UTF-8 */ |
| len = FFMIN(taglen, dstlen-1); |
| get_buffer(s->pb, dst, len); |
| dst[len] = 0; |
| break; |
| } |
| |
| if (!strcmp(key, "genre") |
| && (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) |
| && genre <= ID3v1_GENRE_MAX) |
| av_strlcpy(dst, id3v1_genre_str[genre], sizeof(dst)); |
| |
| if (*dst) |
| av_metadata_set(&s->metadata, key, dst); |
| } |
| |
| /** |
| * ID3v2 parser |
| * |
| * Handles ID3v2.2, 2.3 and 2.4. |
| * |
| */ |
| |
| static void id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags) |
| { |
| int isv34, tlen; |
| uint32_t tag; |
| int64_t next; |
| int taghdrlen; |
| const char *reason; |
| |
| switch(version) { |
| case 2: |
| if(flags & 0x40) { |
| reason = "compression"; |
| goto error; |
| } |
| isv34 = 0; |
| taghdrlen = 6; |
| break; |
| |
| case 3: |
| case 4: |
| isv34 = 1; |
| taghdrlen = 10; |
| break; |
| |
| default: |
| reason = "version"; |
| goto error; |
| } |
| |
| if(flags & 0x80) { |
| reason = "unsynchronization"; |
| goto error; |
| } |
| |
| if(isv34 && flags & 0x40) /* Extended header present, just skip over it */ |
| url_fskip(s->pb, id3v2_get_size(s->pb, 4)); |
| |
| while(len >= taghdrlen) { |
| if(isv34) { |
| tag = get_be32(s->pb); |
| tlen = id3v2_get_size(s->pb, 4); |
| get_be16(s->pb); /* flags */ |
| } else { |
| tag = get_be24(s->pb); |
| tlen = id3v2_get_size(s->pb, 3); |
| } |
| len -= taghdrlen + tlen; |
| |
| if(len < 0) |
| break; |
| |
| next = url_ftell(s->pb) + tlen; |
| |
| switch(tag) { |
| case MKBETAG('T', 'I', 'T', '2'): |
| case MKBETAG(0, 'T', 'T', '2'): |
| id3v2_read_ttag(s, tlen, "title"); |
| break; |
| case MKBETAG('T', 'P', 'E', '1'): |
| case MKBETAG(0, 'T', 'P', '1'): |
| id3v2_read_ttag(s, tlen, "author"); |
| break; |
| case MKBETAG('T', 'A', 'L', 'B'): |
| case MKBETAG(0, 'T', 'A', 'L'): |
| id3v2_read_ttag(s, tlen, "album"); |
| break; |
| case MKBETAG('T', 'C', 'O', 'N'): |
| case MKBETAG(0, 'T', 'C', 'O'): |
| id3v2_read_ttag(s, tlen, "genre"); |
| break; |
| case MKBETAG('T', 'C', 'O', 'P'): |
| case MKBETAG(0, 'T', 'C', 'R'): |
| id3v2_read_ttag(s, tlen, "copyright"); |
| break; |
| case MKBETAG('T', 'R', 'C', 'K'): |
| case MKBETAG(0, 'T', 'R', 'K'): |
| id3v2_read_ttag(s, tlen, "track"); |
| break; |
| case 0: |
| /* padding, skip to end */ |
| url_fskip(s->pb, len); |
| len = 0; |
| continue; |
| } |
| /* Skip to end of tag */ |
| url_fseek(s->pb, next, SEEK_SET); |
| } |
| |
| if(version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */ |
| url_fskip(s->pb, 10); |
| return; |
| |
| error: |
| av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason); |
| url_fskip(s->pb, len); |
| } |
| |
| static void id3v1_get_string(AVFormatContext *s, const char *key, |
| const uint8_t *buf, int buf_size) |
| { |
| int i, c; |
| char *q, str[512]; |
| |
| q = str; |
| for(i = 0; i < buf_size; i++) { |
| c = buf[i]; |
| if (c == '\0') |
| break; |
| if ((q - str) >= sizeof(str) - 1) |
| break; |
| *q++ = c; |
| } |
| *q = '\0'; |
| |
| if (*str) |
| av_metadata_set(&s->metadata, key, str); |
| } |
| |
| /* 'buf' must be ID3v1_TAG_SIZE byte long */ |
| static int id3v1_parse_tag(AVFormatContext *s, const uint8_t *buf) |
| { |
| char str[5]; |
| int genre; |
| |
| if (!(buf[0] == 'T' && |
| buf[1] == 'A' && |
| buf[2] == 'G')) |
| return -1; |
| id3v1_get_string(s, "title", buf + 3, 30); |
| id3v1_get_string(s, "author", buf + 33, 30); |
| id3v1_get_string(s, "album", buf + 63, 30); |
| id3v1_get_string(s, "year", buf + 93, 4); |
| id3v1_get_string(s, "comment", buf + 97, 30); |
| if (buf[125] == 0 && buf[126] != 0) { |
| snprintf(str, sizeof(str), "%d", buf[126]); |
| av_metadata_set(&s->metadata, "track", str); |
| } |
| genre = buf[127]; |
| if (genre <= ID3v1_GENRE_MAX) |
| av_metadata_set(&s->metadata, "genre", id3v1_genre_str[genre]); |
| return 0; |
| } |
| |
| /* mp3 read */ |
| |
| static int mp3_read_probe(AVProbeData *p) |
| { |
| int max_frames, first_frames = 0; |
| int fsize, frames, sample_rate; |
| uint32_t header; |
| uint8_t *buf, *buf0, *buf2, *end; |
| AVCodecContext avctx; |
| |
| buf0 = p->buf; |
| if(ff_id3v2_match(buf0)) { |
| buf0 += ff_id3v2_tag_len(buf0); |
| } |
| |
| max_frames = 0; |
| buf = buf0; |
| end = p->buf + p->buf_size - sizeof(uint32_t); |
| |
| for(; buf < end; buf= buf2+1) { |
| buf2 = buf; |
| |
| for(frames = 0; buf2 < end; frames++) { |
| header = AV_RB32(buf2); |
| fsize = ff_mpa_decode_header(&avctx, header, &sample_rate, &sample_rate, &sample_rate, &sample_rate); |
| if(fsize < 0) |
| break; |
| buf2 += fsize; |
| } |
| max_frames = FFMAX(max_frames, frames); |
| if(buf == buf0) |
| first_frames= frames; |
| } |
| if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1; |
| else if(max_frames>500)return AVPROBE_SCORE_MAX/2; |
| else if(max_frames>=3) return AVPROBE_SCORE_MAX/4; |
| else if(buf0!=p->buf) return AVPROBE_SCORE_MAX/4-1; |
| else if(max_frames>=1) return 1; |
| else return 0; |
| } |
| |
| /** |
| * Try to find Xing/Info/VBRI tags and compute duration from info therein |
| */ |
| static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base) |
| { |
| uint32_t v, spf; |
| int frames = -1; /* Total number of frames in file */ |
| const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}}; |
| MPADecodeHeader c; |
| int vbrtag_size = 0; |
| |
| v = get_be32(s->pb); |
| if(ff_mpa_check_header(v) < 0) |
| return -1; |
| |
| if (ff_mpegaudio_decode_header(&c, v) == 0) |
| vbrtag_size = c.frame_size; |
| if(c.layer != 3) |
| return -1; |
| |
| /* Check for Xing / Info tag */ |
| url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR); |
| v = get_be32(s->pb); |
| if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) { |
| v = get_be32(s->pb); |
| if(v & 0x1) |
| frames = get_be32(s->pb); |
| } |
| |
| /* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */ |
| url_fseek(s->pb, base + 4 + 32, SEEK_SET); |
| v = get_be32(s->pb); |
| if(v == MKBETAG('V', 'B', 'R', 'I')) { |
| /* Check tag version */ |
| if(get_be16(s->pb) == 1) { |
| /* skip delay, quality and total bytes */ |
| url_fseek(s->pb, 8, SEEK_CUR); |
| frames = get_be32(s->pb); |
| } |
| } |
| |
| if(frames < 0) |
| return -1; |
| |
| /* Skip the vbr tag frame */ |
| url_fseek(s->pb, base + vbrtag_size, SEEK_SET); |
| |
| spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */ |
| st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate}, |
| st->time_base); |
| return 0; |
| } |
| |
| static int mp3_read_header(AVFormatContext *s, |
| AVFormatParameters *ap) |
| { |
| AVStream *st; |
| uint8_t buf[ID3v1_TAG_SIZE]; |
| int len, ret, filesize; |
| int64_t off; |
| |
| st = av_new_stream(s, 0); |
| if (!st) |
| return AVERROR(ENOMEM); |
| |
| st->codec->codec_type = CODEC_TYPE_AUDIO; |
| st->codec->codec_id = CODEC_ID_MP3; |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| st->start_time = 0; |
| |
| /* try to get the TAG */ |
| if (!url_is_streamed(s->pb)) { |
| /* XXX: change that */ |
| filesize = url_fsize(s->pb); |
| if (filesize > 128) { |
| url_fseek(s->pb, filesize - 128, SEEK_SET); |
| ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE); |
| if (ret == ID3v1_TAG_SIZE) { |
| id3v1_parse_tag(s, buf); |
| } |
| url_fseek(s->pb, 0, SEEK_SET); |
| } |
| } |
| |
| /* if ID3v2 header found, skip it */ |
| ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE); |
| if (ret != ID3v2_HEADER_SIZE) |
| return -1; |
| if (ff_id3v2_match(buf)) { |
| /* parse ID3v2 header */ |
| len = ((buf[6] & 0x7f) << 21) | |
| ((buf[7] & 0x7f) << 14) | |
| ((buf[8] & 0x7f) << 7) | |
| (buf[9] & 0x7f); |
| id3v2_parse(s, len, buf[3], buf[5]); |
| } else { |
| url_fseek(s->pb, 0, SEEK_SET); |
| } |
| |
| off = url_ftell(s->pb); |
| if (mp3_parse_vbr_tags(s, st, off) < 0) |
| url_fseek(s->pb, off, SEEK_SET); |
| |
| /* the parameters will be extracted from the compressed bitstream */ |
| return 0; |
| } |
| |
| #define MP3_PACKET_SIZE 1024 |
| |
| static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| int ret, size; |
| // AVStream *st = s->streams[0]; |
| |
| size= MP3_PACKET_SIZE; |
| |
| ret= av_get_packet(s->pb, pkt, size); |
| |
| pkt->stream_index = 0; |
| if (ret <= 0) { |
| return AVERROR(EIO); |
| } |
| /* note: we need to modify the packet size here to handle the last |
| packet */ |
| pkt->size = ret; |
| return ret; |
| } |
| |
| #if CONFIG_MP2_MUXER || CONFIG_MP3_MUXER |
| static int id3v1_set_string(AVFormatContext *s, const char *key, |
| uint8_t *buf, int buf_size) |
| { |
| AVMetadataTag *tag; |
| if ((tag = av_metadata_get(s->metadata, key, NULL, 0))) |
| strncpy(buf, tag->value, buf_size); |
| return !!tag; |
| } |
| |
| static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf) |
| { |
| AVMetadataTag *tag; |
| int i, count = 0; |
| |
| memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */ |
| buf[0] = 'T'; |
| buf[1] = 'A'; |
| buf[2] = 'G'; |
| count += id3v1_set_string(s, "title", buf + 3, 30); |
| count += id3v1_set_string(s, "author", buf + 33, 30); |
| count += id3v1_set_string(s, "album", buf + 63, 30); |
| count += id3v1_set_string(s, "year", buf + 93, 4); |
| count += id3v1_set_string(s, "comment", buf + 97, 30); |
| if ((tag = av_metadata_get(s->metadata, "track", NULL, 0))) { |
| buf[125] = 0; |
| buf[126] = atoi(tag->value); |
| count++; |
| } |
| if ((tag = av_metadata_get(s->metadata, "genre", NULL, 0))) { |
| for(i = 0; i <= ID3v1_GENRE_MAX; i++) { |
| if (!strcasecmp(tag->value, id3v1_genre_str[i])) { |
| buf[127] = i; |
| count++; |
| break; |
| } |
| } |
| } |
| return count; |
| } |
| |
| /* simple formats */ |
| |
| static void id3v2_put_size(AVFormatContext *s, int size) |
| { |
| put_byte(s->pb, size >> 21 & 0x7f); |
| put_byte(s->pb, size >> 14 & 0x7f); |
| put_byte(s->pb, size >> 7 & 0x7f); |
| put_byte(s->pb, size & 0x7f); |
| } |
| |
| static void id3v2_put_ttag(AVFormatContext *s, const char *string, uint32_t tag) |
| { |
| int len = strlen(string); |
| put_be32(s->pb, tag); |
| id3v2_put_size(s, len + 1); |
| put_be16(s->pb, 0); |
| put_byte(s->pb, 3); /* UTF-8 */ |
| put_buffer(s->pb, string, len); |
| } |
| |
| |
| /** |
| * Write an ID3v2.4 header at beginning of stream |
| */ |
| |
| static int mp3_write_header(struct AVFormatContext *s) |
| { |
| AVMetadataTag *title, *author, *album, *genre, *copyright, *track, *year; |
| int totlen = 0; |
| |
| title = av_metadata_get(s->metadata, "title", NULL, 0); |
| author = av_metadata_get(s->metadata, "author", NULL, 0); |
| album = av_metadata_get(s->metadata, "album", NULL, 0); |
| genre = av_metadata_get(s->metadata, "genre", NULL, 0); |
| copyright = av_metadata_get(s->metadata, "copyright", NULL, 0); |
| track = av_metadata_get(s->metadata, "track", NULL, 0); |
| year = av_metadata_get(s->metadata, "year", NULL, 0); |
| |
| if(title) totlen += 11 + strlen(title->value); |
| if(author) totlen += 11 + strlen(author->value); |
| if(album) totlen += 11 + strlen(album->value); |
| if(genre) totlen += 11 + strlen(genre->value); |
| if(copyright) totlen += 11 + strlen(copyright->value); |
| if(track) totlen += 11 + strlen(track->value); |
| if(year) totlen += 11 + strlen(year->value); |
| if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) |
| totlen += strlen(LIBAVFORMAT_IDENT) + 11; |
| |
| if(totlen == 0) |
| return 0; |
| |
| put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */ |
| put_byte(s->pb, 0); |
| put_byte(s->pb, 0); /* flags */ |
| |
| id3v2_put_size(s, totlen); |
| |
| if(title) id3v2_put_ttag(s, title->value, MKBETAG('T', 'I', 'T', '2')); |
| if(author) id3v2_put_ttag(s, author->value, MKBETAG('T', 'P', 'E', '1')); |
| if(album) id3v2_put_ttag(s, album->value, MKBETAG('T', 'A', 'L', 'B')); |
| if(genre) id3v2_put_ttag(s, genre->value, MKBETAG('T', 'C', 'O', 'N')); |
| if(copyright) id3v2_put_ttag(s, copyright->value, MKBETAG('T', 'C', 'O', 'P')); |
| if(track) id3v2_put_ttag(s, track->value, MKBETAG('T', 'R', 'C', 'K')); |
| if(year) id3v2_put_ttag(s, year->value, MKBETAG('T', 'Y', 'E', 'R')); |
| if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) |
| id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C')); |
| return 0; |
| } |
| |
| static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
| { |
| put_buffer(s->pb, pkt->data, pkt->size); |
| put_flush_packet(s->pb); |
| return 0; |
| } |
| |
| static int mp3_write_trailer(struct AVFormatContext *s) |
| { |
| uint8_t buf[ID3v1_TAG_SIZE]; |
| |
| /* write the id3v1 tag */ |
| if (id3v1_create_tag(s, buf) > 0) { |
| put_buffer(s->pb, buf, ID3v1_TAG_SIZE); |
| put_flush_packet(s->pb); |
| } |
| return 0; |
| } |
| #endif /* CONFIG_MP2_MUXER || CONFIG_MP3_MUXER */ |
| |
| #if CONFIG_MP3_DEMUXER |
| AVInputFormat mp3_demuxer = { |
| "mp3", |
| NULL_IF_CONFIG_SMALL("MPEG audio layer 2/3"), |
| 0, |
| mp3_read_probe, |
| mp3_read_header, |
| mp3_read_packet, |
| .flags= AVFMT_GENERIC_INDEX, |
| .extensions = "mp2,mp3,m2a", /* XXX: use probe */ |
| }; |
| #endif |
| #if CONFIG_MP2_MUXER |
| AVOutputFormat mp2_muxer = { |
| "mp2", |
| NULL_IF_CONFIG_SMALL("MPEG audio layer 2"), |
| "audio/x-mpeg", |
| "mp2,m2a", |
| 0, |
| CODEC_ID_MP2, |
| CODEC_ID_NONE, |
| NULL, |
| mp3_write_packet, |
| mp3_write_trailer, |
| }; |
| #endif |
| #if CONFIG_MP3_MUXER |
| AVOutputFormat mp3_muxer = { |
| "mp3", |
| NULL_IF_CONFIG_SMALL("MPEG audio layer 3"), |
| "audio/x-mpeg", |
| "mp3", |
| 0, |
| CODEC_ID_MP3, |
| CODEC_ID_NONE, |
| mp3_write_header, |
| mp3_write_packet, |
| mp3_write_trailer, |
| }; |
| #endif |
