virtual int getSamples(int16_t *target, int noSamples) override {
static int16_t temp[8192];
int sr;
int samples_written = 0;
while(samples_written < noSamples) {
auto free_count = resampler_get_free_count(resampler[0]);
if(free_count > 0) {
const char *err = usf_render(usf_state->emu_state, temp, free_count, &sr);
if(err) {
LOGD("ERROR %s", err);
return 0;
}
}
if(sr != sample_rate) {
resampler_set_rate(resampler[0], 44100.0 / (float)sample_rate);
resampler_set_rate(resampler[1], 44100.0 / (float)sample_rate);
sample_rate = sr;
LOGD("######### NEW RATE %d", sample_rate);
}
uint32_t avg = 0;
for(int i = 0; i<free_count; i++) {
resampler_write_sample(resampler[0], temp[i*2]);
resampler_write_sample(resampler[1], temp[i*2+1]);
avg += (std::abs(temp[i*2]) + std::abs(temp[i*2+1]));
}
while(samples_written < noSamples && resampler_get_sample_count(resampler[0]) > 0) {
auto s0 = resampler_get_sample(resampler[0]);
resampler_remove_sample(resampler[0]);
auto s1 = resampler_get_sample(resampler[1]);
resampler_remove_sample(resampler[1]);
target[samples_written++] = s0;
target[samples_written++] = s1;
}
}
return samples_written;
}
const char * usf_render_resampled(void * state, int16_t * buffer, size_t count, int32_t sample_rate)
{
if ( !buffer )
{
unsigned long samples_buffered = resampler_get_sample_count( USF_STATE->resampler );
resampler_clear(USF_STATE->resampler);
if (samples_buffered)
{
unsigned long samples_to_remove = samples_buffered;
if (samples_to_remove > count)
samples_to_remove = count;
while (samples_to_remove--)
resampler_remove_sample(USF_STATE->resampler);
if (!count)
return 0;
}
count = (size_t)((uint64_t)count * USF_STATE->SampleRate / sample_rate);
if (count > USF_STATE->samples_in_buffer_2)
{
count -= USF_STATE->samples_in_buffer_2;
USF_STATE->samples_in_buffer_2 = 0;
}
else if (count)
{
USF_STATE->samples_in_buffer_2 -= count;
memmove(USF_STATE->samplebuf2, USF_STATE->samplebuf2 + 8192 - USF_STATE->samples_in_buffer_2 * 2, USF_STATE->samples_in_buffer_2 * sizeof(short) * 2);
return 0;
}
return usf_render(state, buffer, count, NULL);
}
while ( count )
{
const char * err;
while ( USF_STATE->samples_in_buffer_2 && resampler_get_free_count(USF_STATE->resampler) )
{
int i = 0, j = resampler_get_free_count(USF_STATE->resampler);
if (j > USF_STATE->samples_in_buffer_2)
j = (int)USF_STATE->samples_in_buffer_2;
for (i = 0; i < j; ++i)
{
resampler_write_sample(USF_STATE->resampler, USF_STATE->samplebuf2[i*2], USF_STATE->samplebuf2[i*2+1]);
}
memmove(USF_STATE->samplebuf2, USF_STATE->samplebuf2 + i * 2, (USF_STATE->samples_in_buffer_2 - i) * sizeof(short) * 2);
USF_STATE->samples_in_buffer_2 -= i;
}
while ( count && resampler_get_sample_count(USF_STATE->resampler) )
{
resampler_get_sample(USF_STATE->resampler, buffer, buffer + 1);
resampler_remove_sample(USF_STATE->resampler);
buffer += 2;
--count;
}
if (!count)
break;
if (USF_STATE->samples_in_buffer_2)
continue;
err = usf_render(state, USF_STATE->samplebuf2, 4096, 0);
if (err)
return err;
USF_STATE->samples_in_buffer_2 = 4096;
resampler_set_rate(USF_STATE->resampler, (float)USF_STATE->SampleRate / (float)sample_rate);
}
return 0;
}
