avolkov
7b0505facc
git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3609 8092fc87-c524-0410-9efc-e669fe64eaf9
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* AIFF format decoder */
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#ifndef AIFF_H_INCL
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#define AIFF_H_INCL
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#include <stdint.h>
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#include "port.h"
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typedef uint32_t aiff_ID;
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#define aiff_MAKE_ID(x1, x2, x3, x4) \
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(((x1) << 24) | ((x2) << 16) | ((x3) << 8) | (x4))
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#define aiff_FormID aiff_MAKE_ID('F', 'O', 'R', 'M')
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#define aiff_FormVersionID aiff_MAKE_ID('F', 'V', 'E', 'R')
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#define aiff_CommonID aiff_MAKE_ID('C', 'O', 'M', 'M')
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#define aiff_SoundDataID aiff_MAKE_ID('S', 'S', 'N', 'D')
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#define aiff_FormTypeAIFF aiff_MAKE_ID('A', 'I', 'F', 'F')
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#define aiff_FormTypeAIFC aiff_MAKE_ID('A', 'I', 'F', 'C')
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#define aiff_CompressionTypeSDX2 aiff_MAKE_ID('S', 'D', 'X', '2')
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typedef struct
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{
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aiff_ID id; /* Chunk ID */
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uint32_t size; /* Chunk size, excluding header */
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} aiff_ChunkHeader;
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#define AIFF_CHUNK_HDR_SIZE (4+4)
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typedef struct
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{
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aiff_ChunkHeader chunk;
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aiff_ID type;
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} aiff_FileHeader;
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typedef struct
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{
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uint32_t version; /* format version, in Mac format */
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} aiff_FormatVersionChunk;
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typedef struct
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{
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uint16_t channels; /* number of channels */
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uint32_t sampleFrames; /* number of sample frames */
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uint16_t sampleSize; /* number of bits per sample */
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int32_t sampleRate; /* number of frames per second */
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/* this is actually stored as IEEE-754 80bit in files */
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} aiff_CommonChunk;
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#define AIFF_COMM_SIZE (2+4+2+10)
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typedef struct
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{
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uint16_t channels; /* number of channels */
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uint32_t sampleFrames; /* number of sample frames */
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uint16_t sampleSize; /* number of bits per sample */
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int32_t sampleRate; /* number of frames per second */
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aiff_ID extTypeID; /* compression type ID */
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char extName[32]; /* compression type name */
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} aiff_ExtCommonChunk;
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#define AIFF_EXT_COMM_SIZE (AIFF_COMM_SIZE+4)
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typedef struct
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{
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uint32_t offset; /* offset to sound data */
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uint32_t blockSize; /* size of alignment blocks */
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} aiff_SoundDataChunk;
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#define AIFF_SSND_SIZE (4+4)
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typedef enum
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{
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aifc_None,
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aifc_Sdx2,
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} aiff_CompressionType;
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#define MAX_CHANNELS 16
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typedef struct
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{
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// read-only
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int last_error;
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aiff_ExtCommonChunk fmtHdr;
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aiff_CompressionType compType;
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// internal
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FILE *fp;
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unsigned bits_per_sample;
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unsigned block_align;
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unsigned file_block;
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uint32_t data_ofs;
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uint32_t data_size;
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uint32_t max_pcm;
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uint32_t cur_pcm;
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int32_t prev_val[MAX_CHANNELS];
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} aiff_File;
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bool aiff_open(aiff_File*, const char *filename);
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void aiff_close(aiff_File*);
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int aiff_readData(aiff_File*, void *buf, uint32_t bufsize);
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#endif /* AIFF_H_INCL */
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