2 * Copyright (C) 2005 Matthieu CASTET
4 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavcodec/get_bits.h"
23 #include "libavcodec/flac.h"
28 #define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F
31 flac_header (AVFormatContext * s, int idx)
33 struct ogg *ogg = s->priv_data;
34 struct ogg_stream *os = ogg->streams + idx;
35 AVStream *st = s->streams[idx];
39 if (os->buf[os->pstart] == 0xff)
42 init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
43 skip_bits1(&gb); /* metadata_last */
44 mdt = get_bits(&gb, 7);
46 if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
47 uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4;
50 skip_bits_long(&gb, 4*8); /* "FLAC" */
51 if(get_bits(&gb, 8) != 1) /* unsupported major version */
53 skip_bits_long(&gb, 8 + 16); /* minor version + header count */
54 skip_bits_long(&gb, 4*8); /* "fLaC" */
56 /* METADATA_BLOCK_HEADER */
57 if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE)
60 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
61 st->codecpar->codec_id = AV_CODEC_ID_FLAC;
62 st->need_parsing = AVSTREAM_PARSE_HEADERS;
64 if (ff_alloc_extradata(st->codecpar, FLAC_STREAMINFO_SIZE) < 0)
65 return AVERROR(ENOMEM);
66 memcpy(st->codecpar->extradata, streaminfo_start, st->codecpar->extradata_size);
68 samplerate = AV_RB24(st->codecpar->extradata + 10) >> 4;
70 return AVERROR_INVALIDDATA;
72 avpriv_set_pts_info(st, 64, 1, samplerate);
73 } else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
74 ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 4, os->psize - 4);
81 old_flac_header (AVFormatContext * s, int idx)
83 struct ogg *ogg = s->priv_data;
84 AVStream *st = s->streams[idx];
85 struct ogg_stream *os = ogg->streams + idx;
86 AVCodecParserContext *parser = av_parser_init(AV_CODEC_ID_FLAC);
87 AVCodecContext *avctx;
94 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
95 st->codecpar->codec_id = AV_CODEC_ID_FLAC;
97 avctx = avcodec_alloc_context3(NULL);
99 ret = AVERROR(ENOMEM);
103 ret = avcodec_parameters_to_context(avctx, st->codecpar);
107 parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
108 av_parser_parse2(parser, avctx,
109 &data, &size, os->buf + os->pstart, os->psize,
110 AV_NOPTS_VALUE, AV_NOPTS_VALUE, -1);
112 av_parser_close(parser);
114 if (avctx->sample_rate) {
115 avpriv_set_pts_info(st, 64, 1, avctx->sample_rate);
116 avcodec_free_context(&avctx);
120 avcodec_free_context(&avctx);
123 av_parser_close(parser);
124 avcodec_free_context(&avctx);
128 const struct ogg_codec ff_flac_codec = {
131 .header = flac_header,
135 const struct ogg_codec ff_old_flac_codec = {
138 .header = old_flac_header,