137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*
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soundlib.h - engine sound lib
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Copyright (C) 2010 Uncle Mike
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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 3 of the License, or
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(at your option) any later version.
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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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#ifndef SOUNDLIB_H
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#define SOUNDLIB_H
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#include "common.h"
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#define FRAME_SIZE 32768 // must match with mp3 frame size
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#define OUTBUF_SIZE 8192 // don't change!
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typedef struct loadwavfmt_s
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{
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const char *formatstring;
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const char *ext;
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qboolean (*loadfunc)( const char *name, const byte *buffer, size_t filesize );
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} loadwavfmt_t;
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typedef struct streamfmt_s
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{
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const char *formatstring;
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const char *ext;
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stream_t *(*openfunc)( const char *filename );
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long (*readfunc)( stream_t *stream, long bytes, void *buffer );
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long (*setposfunc)( stream_t *stream, long newpos );
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long (*getposfunc)( stream_t *stream );
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void (*freefunc)( stream_t *stream );
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} streamfmt_t;
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typedef struct sndlib_s
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{
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const loadwavfmt_t *loadformats;
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const streamfmt_t *streamformat; // music stream
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// current sound state
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int type; // sound type
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int rate; // num samples per second (e.g. 11025 - 11 khz)
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int width; // resolution - bum bits divided by 8 (8 bit is 1, 16 bit is 2)
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int channels; // num channels (1 - mono, 2 - stereo)
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int loopstart; // start looping from
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uint samples; // total samplecount in sound
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uint flags; // additional sound flags
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size_t size; // sound unpacked size (for bounds checking)
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byte *wav; // sound pointer (see sound_type for details)
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byte *tempbuffer; // for convert operations
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int cmd_flags;
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} sndlib_t;
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typedef struct stream_s
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{
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const streamfmt_t *format; // streamformat to operate
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// stream info
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file_t *file; // stream file
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int width; // resolution - num bits divided by 8 (8 bit is 1, 16 bit is 2)
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int rate; // stream rate
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int channels; // stream channels
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int type; // wavtype
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size_t size; // total stream size
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// current stream state
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void *ptr; // internal decoder state
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char temp[OUTBUF_SIZE]; // mpeg decoder stuff
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size_t pos; // actual track position (or actual buffer remains)
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int buffsize; // cached buffer size
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};
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/*
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========================================================================
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.WAV sound format
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========================================================================
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*/
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#define RIFFHEADER (('F'<<24)+('F'<<16)+('I'<<8)+'R') // little-endian "RIFF"
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#define WAVEHEADER (('E'<<24)+('V'<<16)+('A'<<8)+'W') // little-endian "WAVE"
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#define FORMHEADER ((' '<<24)+('t'<<16)+('m'<<8)+'f') // little-endian "fmt "
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#define DATAHEADER (('a'<<24)+('t'<<16)+('a'<<8)+'d') // little-endian "data"
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typedef struct
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{
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int riff_id; // 'RIFF'
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long rLen;
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int wave_id; // 'WAVE'
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int fmt_id; // 'fmt '
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long pcm_header_len; // varies...
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short wFormatTag;
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short nChannels; // 1,2 for stereo data is (l,r) pairs
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long nSamplesPerSec;
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long nAvgBytesPerSec;
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short nBlockAlign;
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short nBitsPerSample;
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} wavehdr_t;
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typedef struct
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{
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int data_id; // 'data' or 'fact'
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long dLen;
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} chunkhdr_t;
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extern sndlib_t sound;
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//
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// formats load
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//
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qboolean Sound_LoadWAV( const char *name, const byte *buffer, size_t filesize );
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qboolean Sound_LoadMPG( const char *name, const byte *buffer, size_t filesize );
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//
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// stream operate
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//
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stream_t *Stream_OpenWAV( const char *filename );
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long Stream_ReadWAV( stream_t *stream, long bytes, void *buffer );
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long Stream_SetPosWAV( stream_t *stream, long newpos );
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long Stream_GetPosWAV( stream_t *stream );
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void Stream_FreeWAV( stream_t *stream );
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stream_t *Stream_OpenMPG( const char *filename );
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long Stream_ReadMPG( stream_t *stream, long bytes, void *buffer );
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long Stream_SetPosMPG( stream_t *stream, long newpos );
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long Stream_GetPosMPG( stream_t *stream );
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void Stream_FreeMPG( stream_t *stream );
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#endif//SOUNDLIB_H
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