/**************************************************************************/
/* audio_driver_xaudio2.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/**************************************************************************/
#include "audio_driver_xaudio2.h"
#include "core/config/project_settings.h"
#include "core/os/os.h"
Error AudioDriverXAudio2::init() {
active.clear();
exit_thread.clear();
pcm_open = false;
samples_in = nullptr;
mix_rate = _get_configured_mix_rate();
// FIXME: speaker_mode seems unused in the Xaudio2 driver so far
speaker_mode = SPEAKER_MODE_STEREO;
channels = 2;
int latency = Engine::get_singleton()->get_audio_output_latency();
buffer_size = closest_power_of_2(latency * mix_rate / 1000);
samples_in = memnew_arr(int32_t, size_t(buffer_size) * channels);
for (int i = 0; i < AUDIO_BUFFERS; i++) {
samples_out[i] = memnew_arr(int16_t, size_t(buffer_size) * channels);
xaudio_buffer[i].AudioBytes = buffer_size * channels * sizeof(int16_t);
xaudio_buffer[i].pAudioData = (const BYTE *)(samples_out[i]);
xaudio_buffer[i].Flags = 0;
}
HRESULT hr;
hr = XAudio2Create(&xaudio, 0, XAUDIO2_DEFAULT_PROCESSOR);
ERR_FAIL_COND_V_MSG(hr != S_OK, ERR_UNAVAILABLE, "Error creating XAudio2 engine.");
hr = xaudio->CreateMasteringVoice(&mastering_voice);
ERR_FAIL_COND_V_MSG(hr != S_OK, ERR_UNAVAILABLE, "Error creating XAudio2 mastering voice.");
wave_format.nChannels = channels;
wave_format.cbSize = 0;
wave_format.nSamplesPerSec = mix_rate;
wave_format.wFormatTag = WAVE_FORMAT_PCM;
wave_format.wBitsPerSample = 16;
wave_format.nBlockAlign = channels * wave_format.wBitsPerSample >> 3;
wave_format.nAvgBytesPerSec = mix_rate * wave_format.nBlockAlign;
hr = xaudio->CreateSourceVoice(&source_voice, &wave_format, 0, XAUDIO2_MAX_FREQ_RATIO, &voice_callback);
ERR_FAIL_COND_V_MSG(hr != S_OK, ERR_UNAVAILABLE, "Error creating XAudio2 source voice. Error code: " + itos(hr) + ".");
thread.start(AudioDriverXAudio2::thread_func, this);
return OK;
}
void AudioDriverXAudio2::thread_func(void *p_udata) {
AudioDriverXAudio2 *ad = static_cast<AudioDriverXAudio2 *>(p_udata);
while (!ad->exit_thread.is_set()) {
if (!ad->active.is_set()) {
for (int i = 0; i < AUDIO_BUFFERS; i++) {
ad->xaudio_buffer[i].Flags = XAUDIO2_END_OF_STREAM;
}
} else {
ad->lock();
ad->start_counting_ticks();
ad->audio_server_process(ad->buffer_size, ad->samples_in);
ad->stop_counting_ticks();
ad->unlock();
for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
ad->samples_out[ad->current_buffer][i] = ad->samples_in[i] >> 16;
}
ad->xaudio_buffer[ad->current_buffer].Flags = 0;
ad->xaudio_buffer[ad->current_buffer].AudioBytes = ad->buffer_size * ad->channels * sizeof(int16_t);
ad->xaudio_buffer[ad->current_buffer].pAudioData = (const BYTE *)(ad->samples_out[ad->current_buffer]);
ad->xaudio_buffer[ad->current_buffer].PlayBegin = 0;
ad->source_voice->SubmitSourceBuffer(&(ad->xaudio_buffer[ad->current_buffer]));
ad->current_buffer = (ad->current_buffer + 1) % AUDIO_BUFFERS;
XAUDIO2_VOICE_STATE state;
while (ad->source_voice->GetState(&state), state.BuffersQueued > AUDIO_BUFFERS - 1) {
WaitForSingleObject(ad->voice_callback.buffer_end_event, INFINITE);
}
}
}
}
void AudioDriverXAudio2::start() {
active.set();
HRESULT hr = source_voice->Start(0);
ERR_FAIL_COND_MSG(hr != S_OK, "Error starting XAudio2 driver. Error code: " + itos(hr) + ".");
}
int AudioDriverXAudio2::get_mix_rate() const {
return mix_rate;
}
AudioDriver::SpeakerMode AudioDriverXAudio2::get_speaker_mode() const {
return speaker_mode;
}
float AudioDriverXAudio2::get_latency() {
XAUDIO2_PERFORMANCE_DATA perf_data;
xaudio->GetPerformanceData(&perf_data);
if (perf_data.CurrentLatencyInSamples) {
return (float)(perf_data.CurrentLatencyInSamples / ((float)mix_rate));
} else {
return 0;
}
}
void AudioDriverXAudio2::lock() {
mutex.lock();
}
void AudioDriverXAudio2::unlock() {
mutex.unlock();
}
void AudioDriverXAudio2::finish() {
exit_thread.set();
if (thread.is_started()) {
thread.wait_to_finish();
}
if (source_voice) {
source_voice->Stop(0);
source_voice->DestroyVoice();
}
if (samples_in) {
memdelete_arr(samples_in);
}
if (samples_out[0]) {
for (int i = 0; i < AUDIO_BUFFERS; i++) {
memdelete_arr(samples_out[i]);
}
}
mastering_voice->DestroyVoice();
}
AudioDriverXAudio2::AudioDriverXAudio2() {
for (int i = 0; i < AUDIO_BUFFERS; i++) {
xaudio_buffer[i] = { 0 };
samples_out[i] = 0;
}
}
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