headshot2017
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
#include "audio.h"
|
|
|
|
#include <stdio.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
|
|
#include "../src/libsm64.h"
|
|
#include "context.h"
|
|
|
|
static SDL_AudioDeviceID dev;
|
|
|
|
pthread_t gSoundThread;
|
|
long long timeInMilliseconds(void)
|
|
{
|
|
struct timeval tv;
|
|
gettimeofday(&tv, NULL);
|
|
|
|
return(((long long)tv.tv_sec)*1000)+(tv.tv_usec/1000);
|
|
}
|
|
|
|
void* audio_thread(void* keepAlive)
|
|
{
|
|
// from https://github.com/ckosmic/libsm64/blob/audio/src/libsm64.c#L535-L555
|
|
// except keepAlive is a null pointer here, so don't use it
|
|
|
|
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,NULL);
|
|
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED,NULL);
|
|
|
|
long long currentTime = timeInMilliseconds();
|
|
long long targetTime = 0;
|
|
while(1)
|
|
{
|
|
//if(!*((bool*)keepAlive)) return NULL;
|
|
|
|
int16_t audioBuffer[544 * 2 * 2];
|
|
uint32_t numSamples = sm64_audio_tick(SDL_GetQueuedAudioSize(dev)/4, 1100, audioBuffer);
|
|
if (SDL_GetQueuedAudioSize(dev)/4 < 6000)
|
|
SDL_QueueAudio(dev, audioBuffer, numSamples * 2 * 4);
|
|
|
|
targetTime = currentTime + 33;
|
|
while (timeInMilliseconds() < targetTime)
|
|
{
|
|
usleep(100);
|
|
//if(!*((bool*)keepAlive)) return NULL;
|
|
}
|
|
currentTime = timeInMilliseconds();
|
|
}
|
|
}
|
|
|
|
void audio_init()
|
|
{
|
|
SDL_AudioSpec want, have;
|
|
SDL_zero(want);
|
|
want.freq = 32000;
|
|
want.format = AUDIO_S16;
|
|
want.channels = 2;
|
|
want.samples = 512;
|
|
want.callback = NULL;
|
|
dev = SDL_OpenAudioDevice(NULL, 0, &want, &have, 0);
|
|
if (dev == 0) {
|
|
fprintf(stderr, "SDL_OpenAudio error: %s\n", SDL_GetError());
|
|
return;
|
|
}
|
|
SDL_PauseAudioDevice(dev, 0);
|
|
|
|
// it's best to run audio in a separate thread
|
|
pthread_create(&gSoundThread, NULL, audio_thread, NULL);
|
|
}
|
|
|