mirror of
https://github.com/wavemotion-dave/NINTV-DS.git
synced 2025-06-18 13:55:33 -04:00
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
// =====================================================================================
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// Copyright (c) 2021-2023 Dave Bernazzani (wavemotion-dave)
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//
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// Copying and distribution of this emulator, its source code and associated
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// readme files, with or without modification, are permitted in any medium without
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// royalty provided the this copyright notice is used and wavemotion-dave (NINTV-DS)
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// and Kyle Davis (BLISS) are thanked profusely.
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//
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// The NINTV-DS emulator is offered as-is, without any warranty.
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// =====================================================================================
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#include <nds/arm7/audio.h>
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#include <nds/fifocommon.h>
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#include <nds/fifomessages.h>
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typedef enum {
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EMUARM7_INIT_SND = 0x123C,
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EMUARM7_STOP_SND = 0x123D,
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EMUARM7_PLAY_SND = 0x123E,
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} FifoMesType;
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//---------------------------------------------------------------------------------
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void soundEmuDataHandler(int bytes, void *user_data)
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{
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int channel = -1;
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FifoMessage msg;
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fifoGetDatamsg(FIFO_USER_01, bytes, (u8*)&msg);
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switch (msg.type) {
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case EMUARM7_PLAY_SND:
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channel = (msg.SoundPlay.format & 0xF0)>>4;
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SCHANNEL_SOURCE(channel) = (u32)msg.SoundPlay.data;
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SCHANNEL_REPEAT_POINT(channel) = msg.SoundPlay.loopPoint;
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SCHANNEL_LENGTH(channel) = msg.SoundPlay.dataSize;
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SCHANNEL_TIMER(channel) = SOUND_FREQ(msg.SoundPlay.freq);
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SCHANNEL_CR(channel) = SCHANNEL_ENABLE | SOUND_VOL(msg.SoundPlay.volume) | SOUND_PAN(msg.SoundPlay.pan) | ((msg.SoundPlay.format & 0xF) << 29) | (msg.SoundPlay.loop ? SOUND_REPEAT : SOUND_ONE_SHOT);
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break;
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case EMUARM7_INIT_SND:
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break;
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case EMUARM7_STOP_SND:
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break;
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}
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}
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//---------------------------------------------------------------------------------
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void soundEmuCommandHandler(u32 command, void* userdata) {
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int cmd = (command ) & 0x00F00000;
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int data = command & 0xFFFF;
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int channel = (command >> 16) & 0xF;
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switch(cmd)
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{
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case SOUND_SET_VOLUME:
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SCHANNEL_CR(channel) &= ~0xFF;
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SCHANNEL_CR(channel) |= data;
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break;
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case SOUND_SET_PAN:
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SCHANNEL_CR(channel) &= ~SOUND_PAN(0xFF);
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SCHANNEL_CR(channel) |= SOUND_PAN(data);
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break;
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case SOUND_SET_FREQ:
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SCHANNEL_TIMER(channel) = SOUND_FREQ(data);
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break;
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case SOUND_SET_WAVEDUTY:
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SCHANNEL_CR(channel) &= ~(7 << 24);
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SCHANNEL_CR(channel) |= (data) << 24;
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break;
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case SOUND_KILL:
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case SOUND_PAUSE:
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SCHANNEL_CR(channel) &= ~SCHANNEL_ENABLE;
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break;
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case SOUND_RESUME:
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SCHANNEL_CR(channel) |= SCHANNEL_ENABLE;
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break;
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default: break;
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}
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}
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//---------------------------------------------------------------------------------
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void installSoundEmuFIFO(void)
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{
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fifoSetDatamsgHandler(FIFO_USER_01, soundEmuDataHandler, 0);
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fifoSetValue32Handler(FIFO_USER_01, soundEmuCommandHandler, 0);
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}
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