00001 /* 00002 * FLAC (Free Lossless Audio Codec) decoder/demuxer common functions 00003 * Copyright (c) 2008 Justin Ruggles 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #ifndef AVCODEC_FLAC_H 00028 #define AVCODEC_FLAC_H 00029 00030 #include "avcodec.h" 00031 00032 #define FLAC_STREAMINFO_SIZE 34 00033 00034 enum { 00035 FLAC_METADATA_TYPE_STREAMINFO = 0, 00036 FLAC_METADATA_TYPE_PADDING, 00037 FLAC_METADATA_TYPE_APPLICATION, 00038 FLAC_METADATA_TYPE_SEEKTABLE, 00039 FLAC_METADATA_TYPE_VORBIS_COMMENT, 00040 FLAC_METADATA_TYPE_CUESHEET, 00041 FLAC_METADATA_TYPE_PICTURE, 00042 FLAC_METADATA_TYPE_INVALID = 127 00043 }; 00044 00045 enum FLACExtradataFormat { 00046 FLAC_EXTRADATA_FORMAT_STREAMINFO = 0, 00047 FLAC_EXTRADATA_FORMAT_FULL_HEADER = 1 00048 }; 00049 00054 #define FLACSTREAMINFO \ 00055 int min_blocksize; \ 00056 int max_blocksize; \ 00057 int max_framesize; \ 00058 int samplerate; \ 00059 int channels; \ 00060 int bps; \ 00061 int64_t samples; \ 00062 00063 typedef struct FLACStreaminfo { 00064 FLACSTREAMINFO 00065 } FLACStreaminfo; 00066 00073 void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s, 00074 const uint8_t *buffer); 00075 00083 int ff_flac_is_extradata_valid(AVCodecContext *avctx, 00084 enum FLACExtradataFormat *format, 00085 uint8_t **streaminfo_start); 00086 00087 #endif /* AVCODEC_FLAC_H */