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