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author | Andreas Öman <andreas@olebyn.nu> | 2007-05-22 08:28:32 +0000 |
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committer | Benoit Fouet <benoit.fouet@free.fr> | 2007-05-22 08:28:32 +0000 |
commit | 0dc56bfae0991568a325c5776630e0b74f966b39 (patch) | |
tree | 00340a364f0058113fdf829bba0a2e3a4e6a96f0 /libavformat/mp3.c | |
parent | 52b53f8653ac8b4f78c696dfcab09e3b5ba0846c (diff) | |
download | ffmpeg-streaming-0dc56bfae0991568a325c5776630e0b74f966b39.zip ffmpeg-streaming-0dc56bfae0991568a325c5776630e0b74f966b39.tar.gz |
id3v2 writer
patch by Andreas Ãman andreas olebyn nu
original thread: [FFmpeg-devel] [Ffmpeg-devel] ID3v2
Originally committed as revision 9102 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/mp3.c')
-rw-r--r-- | libavformat/mp3.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libavformat/mp3.c b/libavformat/mp3.c index 7daed9e..c0d7f8a 100644 --- a/libavformat/mp3.c +++ b/libavformat/mp3.c @@ -498,8 +498,64 @@ static int mp3_read_close(AVFormatContext *s) #ifdef CONFIG_MUXERS /* 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, 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) { + int totlen = 0; + char tracktxt[10]; + + if(s->track) + snprintf(tracktxt, sizeof(tracktxt) - 1, "%d", s->track); + + if(s->title[0]) totlen += 11 + strlen(s->title); + if(s->author[0]) totlen += 11 + strlen(s->author); + if(s->album[0]) totlen += 11 + strlen(s->album); + if(s->genre[0]) totlen += 11 + strlen(s->genre); + if(s->copyright[0]) totlen += 11 + strlen(s->copyright); + if(s->track) totlen += 11 + strlen(tracktxt); + 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(s->title[0]) id3v2_put_ttag(s, s->title, MKBETAG('T', 'I', 'T', '2')); + if(s->author[0]) id3v2_put_ttag(s, s->author, MKBETAG('T', 'P', 'E', '1')); + if(s->album[0]) id3v2_put_ttag(s, s->album, MKBETAG('T', 'A', 'L', 'B')); + if(s->genre[0]) id3v2_put_ttag(s, s->genre, MKBETAG('T', 'C', 'O', 'N')); + if(s->copyright[0]) id3v2_put_ttag(s, s->copyright, MKBETAG('T', 'C', 'O', 'P')); + if(s->track) id3v2_put_ttag(s, tracktxt, MKBETAG('T', 'R', 'C', 'K')); + if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) + id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C')); return 0; } |