Libav
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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 #define FLAC_MAX_CHANNELS 8 00034 #define FLAC_MIN_BLOCKSIZE 16 00035 #define FLAC_MAX_BLOCKSIZE 65535 00036 00037 enum { 00038 FLAC_CHMODE_INDEPENDENT = 0, 00039 FLAC_CHMODE_LEFT_SIDE = 8, 00040 FLAC_CHMODE_RIGHT_SIDE = 9, 00041 FLAC_CHMODE_MID_SIDE = 10, 00042 }; 00043 00044 enum { 00045 FLAC_METADATA_TYPE_STREAMINFO = 0, 00046 FLAC_METADATA_TYPE_PADDING, 00047 FLAC_METADATA_TYPE_APPLICATION, 00048 FLAC_METADATA_TYPE_SEEKTABLE, 00049 FLAC_METADATA_TYPE_VORBIS_COMMENT, 00050 FLAC_METADATA_TYPE_CUESHEET, 00051 FLAC_METADATA_TYPE_PICTURE, 00052 FLAC_METADATA_TYPE_INVALID = 127 00053 }; 00054 00055 enum FLACExtradataFormat { 00056 FLAC_EXTRADATA_FORMAT_STREAMINFO = 0, 00057 FLAC_EXTRADATA_FORMAT_FULL_HEADER = 1 00058 }; 00059 00060 #define FLACCOMMONINFO \ 00061 int samplerate; \ 00062 int channels; \ 00063 int bps; \ 00064 00065 00069 #define FLACSTREAMINFO \ 00070 FLACCOMMONINFO \ 00071 int max_blocksize; \ 00072 int max_framesize; \ 00073 int64_t samples; \ 00074 00075 typedef struct FLACStreaminfo { 00076 FLACSTREAMINFO 00077 } FLACStreaminfo; 00078 00079 typedef struct FLACFrameInfo { 00080 FLACCOMMONINFO 00081 int blocksize; 00082 int ch_mode; 00083 } FLACFrameInfo; 00084 00091 void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s, 00092 const uint8_t *buffer); 00093 00101 int ff_flac_is_extradata_valid(AVCodecContext *avctx, 00102 enum FLACExtradataFormat *format, 00103 uint8_t **streaminfo_start); 00104 00112 void ff_flac_parse_block_header(const uint8_t *block_header, 00113 int *last, int *type, int *size); 00114 00121 int ff_flac_get_max_frame_size(int blocksize, int ch, int bps); 00122 00123 #endif /* AVCODEC_FLAC_H */