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/*
* Copyright (C) 2005 Matthieu CASTET |
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* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* 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 |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/
#include <stdlib.h> |
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#include "libavcodec/get_bits.h" |
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#include "libavcodec/flac.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "oggdec.h" |
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|
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#define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F |
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static int
flac_header (AVFormatContext * s, int idx)
{ |
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struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx; |
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AVStream *st = s->streams[idx];
GetBitContext gb; |
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FLACStreaminfo si; |
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int mdt;
if (os->buf[os->pstart] == 0xff)
return 0;
init_get_bits(&gb, os->buf + os->pstart, os->psize*8); |
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skip_bits1(&gb); /* metadata_last */ |
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mdt = get_bits(&gb, 7);
|
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if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4; |
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skip_bits_long(&gb, 4*8); /* "FLAC" */ |
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if(get_bits(&gb, 8) != 1) /* unsupported major version */
return -1; |
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skip_bits_long(&gb, 8 + 16); /* minor version + header count */
skip_bits_long(&gb, 4*8); /* "fLaC" */ |
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|
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/* METADATA_BLOCK_HEADER */ |
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if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE) |
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return -1;
|
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avpriv_flac_parse_streaminfo(st->codec, &si, streaminfo_start); |
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|
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->codec_id = AV_CODEC_ID_FLAC; |
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st->need_parsing = AVSTREAM_PARSE_HEADERS; |
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|
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st->codec->extradata = |
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av_malloc(FLAC_STREAMINFO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE); |
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memcpy(st->codec->extradata, streaminfo_start, FLAC_STREAMINFO_SIZE); |
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st->codec->extradata_size = FLAC_STREAMINFO_SIZE; |
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|
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avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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} else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) { |
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ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 4, os->psize - 4); |
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}
return 1;
}
|
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static int
old_flac_header (AVFormatContext * s, int idx)
{
AVStream *st = s->streams[idx]; |
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->codec_id = AV_CODEC_ID_FLAC; |
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return 0;
}
|
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const struct ogg_codec ff_flac_codec = { |
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.magic = "\177FLAC",
.magicsize = 5, |
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.header = flac_header,
.nb_header = 2, |
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}; |
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|
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const struct ogg_codec ff_old_flac_codec = { |
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.magic = "fLaC",
.magicsize = 4, |
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.header = old_flac_header,
.nb_header = 0, |
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}; |