// open the android audio device for input and/or output
OPENSL_STREAM *android_OpenAudioDevice(int sr, int outchannels, int bufferframes){
OPENSL_STREAM *p;
p = (OPENSL_STREAM *) malloc(sizeof(OPENSL_STREAM));
memset(p, 0, sizeof(OPENSL_STREAM));
p->outchannels = outchannels;
p->sr = sr;
if((p->outBufSamples = bufferframes*outchannels) != 0) {
if((p->outputBuffer = (short *) calloc(p->outBufSamples, sizeof(short))) == NULL) {
android_CloseAudioDevice(p);
return NULL;
}
}
if((p->outrb = create_circular_buffer(p->outBufSamples*sizeof(short)*4)) == NULL) {
android_CloseAudioDevice(p);
return NULL;
}
if(openSLCreateEngine(p) != SL_RESULT_SUCCESS) {
android_CloseAudioDevice(p);
return NULL;
}
if(openSLPlayOpen(p) != SL_RESULT_SUCCESS) {
android_CloseAudioDevice(p);
return NULL;
}
return p;
}
int main_circularbuffer() {
/*
Benchmark for 100 MB of data at the time of writing with gcc -O9
real 0m0.347s
user 0m0.345s
sys 0m0.001s
With gcc -O2
real 0m0.539s
user 0m0.535s
sys 0m0.000s
*/
CircularBuffer* state = create_circular_buffer(3);
push_circular_buffer(state, 'x');
push_circular_buffer(state, 'x');
push_circular_buffer(state, 'x');
for(int i=0;i<100000000; i++){
rotate_circular_buffer(state, 'a');
}
destroy_circular_buffer(state);
return 0;
}
