JailDoctor/chirping
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now using AudioCallback

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This commit is contained in:
Raimon Zamora
2021-09-15 11:58:22 +02:00
parent e0b3720126
commit d5262780f4
1 changed files with 17 additions and 8 deletions
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25
main.cpp
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@@ -25,7 +25,20 @@ int current_instrument = 0;
int current_volume = 2;
int current_effect = 0;
SDL_AudioSpec audioSpec{SAMPLES_PER_SECOND, AUDIO_FORMAT, 1, 0, 512, 0, 0, NULL, NULL};
toneGen tonegen(SOUND_NUM_SAMPLES);
SDL_AudioDeviceID sdlAudioDevice;
void audioCallback(void* userdata, Uint8* stream, int len) {
Sint16* buffer = (Sint16*)stream;
int numSamples = tonegen.getSamples(len >> 1, buffer);
if (numSamples*2 < len) {
int rest = len - numSamples*2;
SDL_memset(&stream[numSamples*2], 0, rest);
SDL_PauseAudioDevice(sdlAudioDevice, 1);
}
}
SDL_AudioSpec audioSpec{SAMPLES_PER_SECOND, AUDIO_FORMAT, 1, 0, 512, 0, 0, &audioCallback, NULL};
const char get_hex(const uint8_t num) {
static const char hexstr[17] = "0123456789ABCDEF";
@@ -35,15 +48,14 @@ const char get_hex(const uint8_t num) {
int main(int argc, char* argv[]) {
pattern[0][0] = (34<<10) + (2<<8) + (7<<4) + 5;
SDL_Init(SDL_INIT_EVERYTHING);
SDL_AudioDeviceID sdlAudioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, NULL, 0);
sdlAudioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, NULL, 0);
AUDIO_FORMAT_TYPE beeps[int(SOUND_NUM_SAMPLES*8)];
AUDIO_FORMAT_TYPE beeps2[int(SOUND_NUM_SAMPLES*8)];
AUDIO_FORMAT_TYPE *pointer = beeps;
toneGen tonegen(SOUND_NUM_SAMPLES);
tonegen.setup(22, CHIPTUNE_INSTRUMENT_TRIANGLE, 13, CHIPTUNE_EFFECT_DROP);
/*tonegen.setup(22, CHIPTUNE_INSTRUMENT_TRIANGLE, 13, CHIPTUNE_EFFECT_DROP);
int numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, pointer); pointer += int(SOUND_NUM_SAMPLES);
tonegen.setup(32, CHIPTUNE_INSTRUMENT_SQUARE, 0, CHIPTUNE_EFFECT_NONE);
numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, pointer); pointer += int(SOUND_NUM_SAMPLES);
@@ -77,6 +89,7 @@ int main(int argc, char* argv[]) {
numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, pointer); pointer += int(SOUND_NUM_SAMPLES);
tonegen.setup(47, CHIPTUNE_INSTRUMENT_SQUARE, 1, CHIPTUNE_EFFECT_NONE);
numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, pointer); pointer += int(SOUND_NUM_SAMPLES);
*/
for (int i=0; i<SOUND_NUM_SAMPLES*8;++i) {
beeps[i] += beeps2[i];
@@ -145,8 +158,6 @@ int main(int argc, char* argv[]) {
if ((key == SDL_SCANCODE_PERIOD) || (key == SDL_SCANCODE_DELETE)) note.Set(0);
if (key == SDL_SCANCODE_SPACE) {
tonegen.setup(note.Get());
numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, beeps);
SDL_QueueAudio(sdlAudioDevice, &beeps[0], SOUND_SIZE_IN_BYTES);
SDL_PauseAudioDevice(sdlAudioDevice, 0);
}
if (selected_part==0) {
@@ -168,8 +179,6 @@ int main(int argc, char* argv[]) {
};
if (m) {
tonegen.setup(note.Get());
numSamples = tonegen.getSamples(SOUND_NUM_SAMPLES, beeps);
SDL_QueueAudio(sdlAudioDevice, &beeps[0], SOUND_SIZE_IN_BYTES);
SDL_PauseAudioDevice(sdlAudioDevice, 0);
}
}