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Annotation of uae/src/od-amiga/sound.h, revision 1.1.1.1

1.1       root        1:  /* 
                      2:   * UAE - The Un*x Amiga Emulator
                      3:   * 
                      4:   * Support for Amiga audio.device sound
                      5:   * 
                      6:   * Copyright 1996, 1997 Samuel Devulder
                      7:   */
                      8: 
                      9: #include <proto/exec.h>
                     10: #include <proto/dos.h>
                     11: #ifndef __SASC
                     12: #include <proto/alib.h>
                     13: #endif
                     14: 
                     15: #include <exec/memory.h>
                     16: #include <exec/devices.h>
                     17: #include <exec/io.h>
                     18: 
                     19: #include <graphics/gfxbase.h>
                     20: #include <devices/timer.h>
                     21: #include <devices/audio.h>
                     22: 
                     23: extern char whichchannel[];
                     24: extern struct IOAudio *AudioIO;
                     25: extern struct MsgPort *AudioMP;
                     26: extern struct Message *AudioMSG;
                     27: 
                     28: extern unsigned char *buffers[2];
                     29: extern uae_u16 *sndbuffer, *sndbufpt;
                     30: extern int bufidx, devopen;
                     31: extern int sndbufsize;
                     32: 
                     33: extern int have_sound, clockval, oldledstate, period;
                     34: 
                     35: extern ULONG AUDIO_FILE;
                     36: 
                     37: static __inline__ void flush_sound_buffer(void)
                     38: {
                     39:     if(AUDIO_FILE) {
                     40:         Write(AUDIO_FILE, buffers[bufidx], sndbufsize);
                     41:     } else {
                     42:        static char IOSent = 0;
                     43: 
                     44:        AudioIO->ioa_Request.io_Command = CMD_WRITE;
                     45:        AudioIO->ioa_Request.io_Flags   = ADIOF_PERVOL|IOF_QUICK;
                     46:        AudioIO->ioa_Data               = (uae_s8 *)buffers[bufidx];
                     47:        AudioIO->ioa_Length             = sndbufsize;
                     48:        AudioIO->ioa_Period             = period;
                     49:        AudioIO->ioa_Volume             = 64;
                     50:        AudioIO->ioa_Cycles             = 1;
                     51: 
                     52:        if(IOSent) WaitIO((void*)AudioIO); else IOSent=1;
                     53:        BeginIO((void*)AudioIO);
                     54: 
                     55:        /* double buffering */
                     56:        bufidx = 1 - bufidx;
                     57:        sndbuffer = sndbufpt = (uae_u16*)buffers[bufidx];
                     58:     }
                     59: }
                     60: 
                     61: static __inline__ void check_sound_buffers (void)
                     62: {
                     63:     if ((char *)sndbufpt - (char *)sndbuffer >= sndbufsize) {
                     64:        flush_sound_buffer();
                     65:     }
                     66: }
                     67: 
                     68: #define PUT_SOUND_BYTE(b) do { *(uae_u8 *)sndbufpt = b; sndbufpt = (uae_u16 *)(((uae_u8 *)sndbufpt) + 1); } while (0)
                     69: #define PUT_SOUND_WORD(b) do { *(uae_u16 *)sndbufpt = b; sndbufpt = (uae_u16 *)(((uae_u8 *)sndbufpt) + 2); } while (0)
                     70: #define SOUND16_BASE_VAL 0
                     71: #define SOUND8_BASE_VAL 0
                     72: 
                     73: #define DEFAULT_SOUND_MAXB 8192
                     74: #define DEFAULT_SOUND_MINB 8192
                     75: #define DEFAULT_SOUND_BITS 16
                     76: #define DEFAULT_SOUND_FREQ 11025
                     77: 
                     78: #define UNSUPPORTED_OPTION_b
                     79: 
                     80: #undef DONT_WANT_SOUND

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