DWORD Player::InstancePlayThread() {
Timer timer;
uint64_t current_cycles=0,prev_cycles=0;
double span_accumulator = 0;
double update_time = 1000.0;
double timer_res = timer.resolution();
uint32_t samples_to_render = uint32_t(update_time * 0.001 * audio_interface_->wave_format().nSamplesPerSec);
uint32_t buffer_size = samples_to_render * audio_interface_->wave_format().nBlockAlign;
thread_time_span = 0;
while (1) {
EnterCriticalSection(&cs);
if (thread_msg == WM_SP_QUIT) {
thread_msg = 0;
break;
} else if (thread_msg == WM_SP_PLAY) {
if (state_ != kStatePlaying) {
prev_cycles = timer.GetCurrentCycles();
state_ = kStatePlaying;
span_accumulator = update_time;
audio_interface_->Play();
}
} else if (thread_msg == WM_SP_PAUSE) {
if (state_ != kStatePaused) {
ResetEvent(player_event);
state_ = kStatePaused;
memset(output_buffer,0,output_buffer_samples_*sizeof(short));
audio_interface_->Write(output_buffer,output_buffer_samples_*sizeof(short));
}
} else if (thread_msg == WM_SP_STOP) {
if (state_ != kStateStopped) {
ResetEvent(player_event);
state_ = kStateStopped;
synth_->Reset();
song_counter_ms = 0;
audio_interface_->Stop();
thread_time_span = 0;
}
}
thread_msg = 0;
LeaveCriticalSection(&cs);
if (state_ == kStatePlaying) {
current_cycles = timer.GetCurrentCycles();
double time_span = (current_cycles - prev_cycles) * timer_res;
if (time_span >= output_buffer_length_ms_) //should be at max, output buffer length in ms
time_span = output_buffer_length_ms_;
while (span_accumulator >= update_time) {
//memset(mix_buffer,0,output_buffer_samples_*sizeof(real_t));
synth_->RenderSamplesStereo(samples_to_render,mix_buffer);
song_counter_ms += update_time;
if (TryEnterCriticalSection(&vis_cs) != 0) {
if (visual_addon_ != nullptr && samples_to_render >= 256)
visual_addon_->AddPCMData256(mix_buffer,2,update_time);
LeaveCriticalSection(&vis_cs);
}
clamp(output_buffer,mix_buffer,samples_to_render<<1);
audio_interface_->Write(output_buffer,buffer_size);
span_accumulator -= update_time;
}
span_accumulator += time_span;
thread_time_span += time_span;
prev_cycles = current_cycles;
} else {
//wait for pause/stop events with timer
WaitForSingleObject(player_event,2000);
}
}
return S_OK;
}
