Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Copyright (C) 2005 Matthieu CASTET |
||
| 3 | * |
||
| 4 | * This file is part of FFmpeg. |
||
| 5 | * |
||
| 6 | * FFmpeg is free software; you can redistribute it and/or |
||
| 7 | * modify it under the terms of the GNU Lesser General Public |
||
| 8 | * License as published by the Free Software Foundation; either |
||
| 9 | * version 2.1 of the License, or (at your option) any later version. |
||
| 10 | * |
||
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||
| 14 | * Lesser General Public License for more details. |
||
| 15 | * |
||
| 16 | * You should have received a copy of the GNU Lesser General Public |
||
| 17 | * License along with FFmpeg; if not, write to the Free Software |
||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||
| 19 | */ |
||
| 20 | |||
| 21 | #include |
||
| 22 | #include "libavcodec/get_bits.h" |
||
| 23 | #include "libavcodec/flac.h" |
||
| 24 | #include "avformat.h" |
||
| 25 | #include "internal.h" |
||
| 26 | #include "oggdec.h" |
||
| 27 | |||
| 28 | #define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F |
||
| 29 | |||
| 30 | static int |
||
| 31 | flac_header (AVFormatContext * s, int idx) |
||
| 32 | { |
||
| 33 | struct ogg *ogg = s->priv_data; |
||
| 34 | struct ogg_stream *os = ogg->streams + idx; |
||
| 35 | AVStream *st = s->streams[idx]; |
||
| 36 | GetBitContext gb; |
||
| 37 | FLACStreaminfo si; |
||
| 38 | int mdt; |
||
| 39 | |||
| 40 | if (os->buf[os->pstart] == 0xff) |
||
| 41 | return 0; |
||
| 42 | |||
| 43 | init_get_bits(&gb, os->buf + os->pstart, os->psize*8); |
||
| 44 | skip_bits1(&gb); /* metadata_last */ |
||
| 45 | mdt = get_bits(&gb, 7); |
||
| 46 | |||
| 47 | if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) { |
||
| 48 | uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4; |
||
| 49 | skip_bits_long(&gb, 4*8); /* "FLAC" */ |
||
| 50 | if(get_bits(&gb, 8) != 1) /* unsupported major version */ |
||
| 51 | return -1; |
||
| 52 | skip_bits_long(&gb, 8 + 16); /* minor version + header count */ |
||
| 53 | skip_bits_long(&gb, 4*8); /* "fLaC" */ |
||
| 54 | |||
| 55 | /* METADATA_BLOCK_HEADER */ |
||
| 56 | if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE) |
||
| 57 | return -1; |
||
| 58 | |||
| 59 | avpriv_flac_parse_streaminfo(st->codec, &si, streaminfo_start); |
||
| 60 | |||
| 61 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
||
| 62 | st->codec->codec_id = AV_CODEC_ID_FLAC; |
||
| 63 | st->need_parsing = AVSTREAM_PARSE_HEADERS; |
||
| 64 | |||
| 65 | if (ff_alloc_extradata(st->codec, FLAC_STREAMINFO_SIZE) < 0) |
||
| 66 | return AVERROR(ENOMEM); |
||
| 67 | memcpy(st->codec->extradata, streaminfo_start, st->codec->extradata_size); |
||
| 68 | |||
| 69 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
||
| 70 | } else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) { |
||
| 71 | ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 4, os->psize - 4); |
||
| 72 | } |
||
| 73 | |||
| 74 | return 1; |
||
| 75 | } |
||
| 76 | |||
| 77 | static int |
||
| 78 | old_flac_header (AVFormatContext * s, int idx) |
||
| 79 | { |
||
| 80 | struct ogg *ogg = s->priv_data; |
||
| 81 | AVStream *st = s->streams[idx]; |
||
| 82 | struct ogg_stream *os = ogg->streams + idx; |
||
| 83 | AVCodecParserContext *parser = av_parser_init(AV_CODEC_ID_FLAC); |
||
| 84 | int size; |
||
| 85 | uint8_t *data; |
||
| 86 | |||
| 87 | if (!parser) |
||
| 88 | return -1; |
||
| 89 | |||
| 90 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
||
| 91 | st->codec->codec_id = AV_CODEC_ID_FLAC; |
||
| 92 | |||
| 93 | parser->flags = PARSER_FLAG_COMPLETE_FRAMES; |
||
| 94 | av_parser_parse2(parser, st->codec, |
||
| 95 | &data, &size, os->buf + os->pstart, os->psize, |
||
| 96 | AV_NOPTS_VALUE, AV_NOPTS_VALUE, -1); |
||
| 97 | |||
| 98 | av_parser_close(parser); |
||
| 99 | |||
| 100 | if (st->codec->sample_rate) { |
||
| 101 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
||
| 102 | return 0; |
||
| 103 | } |
||
| 104 | |||
| 105 | return 1; |
||
| 106 | } |
||
| 107 | |||
| 108 | const struct ogg_codec ff_flac_codec = { |
||
| 109 | .magic = "\177FLAC", |
||
| 110 | .magicsize = 5, |
||
| 111 | .header = flac_header, |
||
| 112 | .nb_header = 2, |
||
| 113 | }; |
||
| 114 | |||
| 115 | const struct ogg_codec ff_old_flac_codec = { |
||
| 116 | .magic = "fLaC", |
||
| 117 | .magicsize = 4, |
||
| 118 | .header = old_flac_header, |
||
| 119 | .nb_header = 0, |
||
| 120 | }; |