yading@11: /*
yading@11:  *    Copyright (C) 2005  Matthieu CASTET
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include <stdlib.h>
yading@11: #include "libavcodec/get_bits.h"
yading@11: #include "libavcodec/flac.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "oggdec.h"
yading@11: 
yading@11: #define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F
yading@11: 
yading@11: static int
yading@11: flac_header (AVFormatContext * s, int idx)
yading@11: {
yading@11:     struct ogg *ogg = s->priv_data;
yading@11:     struct ogg_stream *os = ogg->streams + idx;
yading@11:     AVStream *st = s->streams[idx];
yading@11:     GetBitContext gb;
yading@11:     FLACStreaminfo si;
yading@11:     int mdt;
yading@11: 
yading@11:     if (os->buf[os->pstart] == 0xff)
yading@11:         return 0;
yading@11: 
yading@11:     init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
yading@11:     skip_bits1(&gb); /* metadata_last */
yading@11:     mdt = get_bits(&gb, 7);
yading@11: 
yading@11:     if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
yading@11:         uint8_t *streaminfo_start = os->buf + os->pstart + 5 + 4 + 4 + 4;
yading@11:         skip_bits_long(&gb, 4*8); /* "FLAC" */
yading@11:         if(get_bits(&gb, 8) != 1) /* unsupported major version */
yading@11:             return -1;
yading@11:         skip_bits_long(&gb, 8 + 16); /* minor version + header count */
yading@11:         skip_bits_long(&gb, 4*8); /* "fLaC" */
yading@11: 
yading@11:         /* METADATA_BLOCK_HEADER */
yading@11:         if (get_bits_long(&gb, 32) != FLAC_STREAMINFO_SIZE)
yading@11:             return -1;
yading@11: 
yading@11:         avpriv_flac_parse_streaminfo(st->codec, &si, streaminfo_start);
yading@11: 
yading@11:         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
yading@11:         st->codec->codec_id = AV_CODEC_ID_FLAC;
yading@11:         st->need_parsing = AVSTREAM_PARSE_HEADERS;
yading@11: 
yading@11:         st->codec->extradata =
yading@11:             av_malloc(FLAC_STREAMINFO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:         memcpy(st->codec->extradata, streaminfo_start, FLAC_STREAMINFO_SIZE);
yading@11:         st->codec->extradata_size = FLAC_STREAMINFO_SIZE;
yading@11: 
yading@11:         avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
yading@11:     } else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
yading@11:         ff_vorbis_comment (s, &st->metadata, os->buf + os->pstart + 4, os->psize - 4);
yading@11:     }
yading@11: 
yading@11:     return 1;
yading@11: }
yading@11: 
yading@11: static int
yading@11: old_flac_header (AVFormatContext * s, int idx)
yading@11: {
yading@11:     AVStream *st = s->streams[idx];
yading@11:     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
yading@11:     st->codec->codec_id = AV_CODEC_ID_FLAC;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: const struct ogg_codec ff_flac_codec = {
yading@11:     .magic = "\177FLAC",
yading@11:     .magicsize = 5,
yading@11:     .header = flac_header,
yading@11:     .nb_header = 2,
yading@11: };
yading@11: 
yading@11: const struct ogg_codec ff_old_flac_codec = {
yading@11:     .magic = "fLaC",
yading@11:     .magicsize = 4,
yading@11:     .header = old_flac_header,
yading@11:     .nb_header = 0,
yading@11: };