dranke/uw8-wasm3
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implement audio

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This commit is contained in:
Dennis Ranke
2023-04-02 01:15:24 +02:00
parent 30543fecdf
commit 2df498152c
3 changed files with 47 additions and 4 deletions
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2
.gitignore vendored
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@@ -1,2 +1,2 @@
*.o
/wasm3-test
/uw8-wasm3

2
Makefile
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@@ -5,7 +5,7 @@ uw8-wasm3: main.o $(WASM3_O)
gcc -g -lm -lSDL2 -o uw8-wasm3 $^
run: uw8-wasm3 .PHONY
./uw8-wasm3
./uw8-wasm3 never_sleeps.uw8
run-ts:
deno run --allow-read main.ts

45
main.c
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@@ -166,6 +166,25 @@ void initRuntime(Uw8Runtime* runtime, IM3Environment env,
verifyM3(runtime->runtime, m3_RunStart(runtime->cart));
}
typedef struct AudioState {
Uw8Runtime runtime;
uint8_t* memory;
IM3Function snd;
uint8_t registers[32];
uint32_t sampleIndex;
} AudioState;
void audioCallback(void* userdata, Uint8* stream, int len) {
AudioState* state = (AudioState*)userdata;
float* samples = (float*)stream;
int numSamples = len / sizeof(float);
memcpy(state->memory + 0x50, state->registers, 32);
for(int i = 0; i < numSamples; ++i) {
m3_CallV(state->snd, state->sampleIndex++);
m3_GetResultsV(state->snd, samples++);
}
}
int main(int argc, const char** argv) {
if(argc != 2) {
fprintf(stderr, "Usage: uw8-wasm3 <UW8-MODULE>\n");
@@ -216,7 +235,26 @@ int main(int argc, const char** argv) {
assert(memory != NULL);
IM3Function updFunc;
verifyM3(runtime.runtime, m3_FindFunction(&updFunc, runtime.runtime, "upd"));
bool hasUpdFunc = m3_FindFunction(&updFunc, runtime.runtime, "upd") == NULL;
AudioState audioState;
initRuntime(&audioState.runtime, env, platformWasm, platformSize, cartWasm, cartSize);
audioState.memory = m3_GetMemory(audioState.runtime.runtime, NULL, 0);
if(m3_FindFunction(&audioState.snd, audioState.runtime.runtime, "snd") != NULL) {
verifyM3(audioState.runtime.runtime, m3_FindFunction(&audioState.snd, audioState.runtime.runtime, "sndGes"));
}
memcpy(audioState.registers, audioState.memory + 0x50, 32);
audioState.sampleIndex = 0;
SDL_AudioSpec audioSpec;
audioSpec.freq = 44100;
audioSpec.format = AUDIO_F32SYS;
audioSpec.channels = 2;
audioSpec.samples = 256;
audioSpec.callback = audioCallback;
audioSpec.userdata = &audioState;
SDL_AudioDeviceID audioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, &audioSpec, 0);
SDL_PauseAudioDevice(audioDevice, 0);
uint32_t startTime = SDL_GetTicks();
@@ -254,7 +292,10 @@ int main(int argc, const char** argv) {
}
memory[0x44] = buttons;
if(hasUpdFunc) {
verifyM3(runtime.runtime, m3_CallV(updFunc));
}
memcpy(audioState.registers, memory + 0x50, 32);
uint32_t* palette = (uint32_t*)(memory + 0x13000);
uint8_t* pixels = memory + 120;
@@ -275,6 +316,8 @@ int main(int argc, const char** argv) {
}
}
SDL_CloseAudioDevice(audioDevice);
m3_FreeRuntime(audioState.runtime.runtime);
m3_FreeRuntime(runtime.runtime);
}