diff options
Diffstat (limited to 'synth.c')
| -rw-r--r-- | synth.c | 31 |
1 files changed, 24 insertions, 7 deletions
@@ -2,6 +2,7 @@ #include <unistd.h> #include "synth.h" +#include "mutex.h" #include "minisdl_audio.h" #define TSF_IMPLEMENTATION @@ -12,7 +13,7 @@ static SDL_mutex* g_Mutex; // Render the audio samples in float format. static void AudioCallback(void* data, Uint8 *stream, int len) { - int SampleCount = (len / (2 * sizeof(float))); // 2 output channels. + int SampleCount = (len / (AUDIO_CHANNELS * sizeof(float))); // 2 output channels. SDL_LockMutex(g_Mutex); // Get exclusive lock. tsf_render_float(g_TinySoundFont, (float*)stream, SampleCount, 0); SDL_UnlockMutex(g_Mutex); @@ -22,10 +23,10 @@ void *synth(void *arg) { SynthArgs* args = (SynthArgs*)arg; SDL_AudioSpec OutputAudioSpec; - OutputAudioSpec.freq = 44100; + OutputAudioSpec.freq = AUDIO_FREQ; OutputAudioSpec.format = AUDIO_F32; - OutputAudioSpec.channels = 2; - OutputAudioSpec.samples = 4096; + OutputAudioSpec.channels = AUDIO_CHANNELS; + OutputAudioSpec.samples = AUDIO_SAMPLES; OutputAudioSpec.callback = AudioCallback; // Initialize the audio system. @@ -56,12 +57,28 @@ void *synth(void *arg) { SDL_PauseAudio(0); while (1) { - sleep(1); + pthread_mutex_lock(&mutex); + while (shared_data.action == 0) { + pthread_cond_wait(&cond_synth, &mutex); + } SDL_LockMutex(g_Mutex); - tsf_note_off(g_TinySoundFont, 1, 50); - tsf_note_on(g_TinySoundFont, 1, 50, 1.0f); + + if (shared_data.state == 0) { + tsf_note_off(g_TinySoundFont, shared_data.preset, shared_data.note); + } else { + float normalized_velocity = (float)shared_data.velocity / 127.0f; + tsf_note_on(g_TinySoundFont, shared_data.preset, shared_data.note, normalized_velocity); + } + SDL_UnlockMutex(g_Mutex); + + printf("Consumed: note=%d, state=%d velocity:%d\n", shared_data.note, shared_data.state, shared_data.velocity); + + // Reset state to indicate data has been consumed. + shared_data.action = 0; + + pthread_mutex_unlock(&mutex); } } |