void AudioDriverALSA::thread_func(void* p_udata) {
AudioDriverALSA* ad = (AudioDriverALSA*)p_udata;
while (!ad->exit_thread) {
if (!ad->active) {
for (unsigned int i=0; i < ad->period_size*ad->channels; i++) {
ad->samples_out[i] = 0;
};
} else {
ad->lock();
ad->audio_server_process(ad->period_size, ad->samples_in);
ad->unlock();
for(unsigned int i=0;i<ad->period_size*ad->channels;i++) {
ad->samples_out[i]=ad->samples_in[i]>>16;
}
};
int todo = ad->period_size;
int total = 0;
while (todo) {
if (ad->exit_thread)
break;
uint8_t* src = (uint8_t*)ad->samples_out;
int wrote = snd_pcm_writei(ad->pcm_handle, (void*)(src + (total*ad->channels)), todo);
if (wrote < 0) {
if (ad->exit_thread)
break;
if ( wrote == -EAGAIN ) {
//can't write yet (though this is blocking..)
usleep(1000);
continue;
}
wrote = snd_pcm_recover(ad->pcm_handle, wrote, 0);
if ( wrote < 0 ) {
//absolute fail
fprintf(stderr, "ALSA failed and can't recover: %s\n", snd_strerror(wrote));
ad->active=false;
ad->exit_thread=true;
break;
}
continue;
};
total += wrote;
todo -= wrote;
};
};
ad->thread_exited=true;
};
void AudioDriverALSA::thread_func(void *p_udata) {
AudioDriverALSA *ad = (AudioDriverALSA *)p_udata;
while (!ad->exit_thread) {
ad->lock();
ad->start_counting_ticks();
if (!ad->active) {
for (unsigned int i = 0; i < ad->period_size * ad->channels; i++) {
ad->samples_out[i] = 0;
}
} else {
ad->audio_server_process(ad->period_size, ad->samples_in.ptrw());
for (unsigned int i = 0; i < ad->period_size * ad->channels; i++) {
ad->samples_out[i] = ad->samples_in[i] >> 16;
}
}
int todo = ad->period_size;
int total = 0;
while (todo && !ad->exit_thread) {
uint8_t *src = (uint8_t *)ad->samples_out.ptr();
int wrote = snd_pcm_writei(ad->pcm_handle, (void *)(src + (total * ad->channels)), todo);
if (wrote > 0) {
total += wrote;
todo -= wrote;
} else if (wrote == -EAGAIN) {
ad->stop_counting_ticks();
ad->unlock();
OS::get_singleton()->delay_usec(1000);
ad->lock();
ad->start_counting_ticks();
} else {
wrote = snd_pcm_recover(ad->pcm_handle, wrote, 0);
if (wrote < 0) {
ERR_PRINTS("ALSA: Failed and can't recover: " + String(snd_strerror(wrote)));
ad->active = false;
ad->exit_thread = true;
}
}
}
// User selected a new device, finish the current one so we'll init the new device
if (ad->device_name != ad->new_device) {
ad->device_name = ad->new_device;
ad->finish_device();
Error err = ad->init_device();
if (err != OK) {
ERR_PRINT("ALSA: init_device error");
ad->device_name = "Default";
ad->new_device = "Default";
err = ad->init_device();
if (err != OK) {
ad->active = false;
ad->exit_thread = true;
}
}
}
ad->stop_counting_ticks();
ad->unlock();
};
ad->thread_exited = true;
};