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- /*************************************************************************/
- /* audio_driver_xaudio2.cpp */
- /*************************************************************************/
- /* This file is part of: */
- /* GODOT ENGINE */
- /* https://godotengine.org */
- /*************************************************************************/
- /* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
- /* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
- /* */
- /* 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.*/
- /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
- /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
- /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
- /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
- /*************************************************************************/
- #include "audio_driver_xaudio2.h"
- #include "os/os.h"
- #include "project_settings.h"
- const char *AudioDriverXAudio2::get_name() const {
- return "XAudio2";
- }
- Error AudioDriverXAudio2::init() {
- active = false;
- thread_exited = false;
- exit_thread = false;
- pcm_open = false;
- samples_in = NULL;
- mix_rate = 48000;
- // FIXME: speaker_mode seems unused in the Xaudio2 driver so far
- speaker_mode = SPEAKER_MODE_STEREO;
- channels = 2;
- int latency = GLOBAL_DEF("audio/output_latency", 25);
- buffer_size = closest_power_of_2(latency * mix_rate / 1000);
- samples_in = memnew_arr(int32_t, buffer_size * channels);
- for (int i = 0; i < AUDIO_BUFFERS; i++) {
- samples_out[i] = memnew_arr(int16_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);
- if (hr != S_OK) {
- ERR_EXPLAIN("Error creating XAudio2 engine.");
- ERR_FAIL_V(ERR_UNAVAILABLE);
- }
- hr = xaudio->CreateMasteringVoice(&mastering_voice);
- if (hr != S_OK) {
- ERR_EXPLAIN("Error creating XAudio2 mastering voice.");
- ERR_FAIL_V(ERR_UNAVAILABLE);
- }
- 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);
- if (hr != S_OK) {
- ERR_EXPLAIN("Error creating XAudio2 source voice. " + itos(hr));
- ERR_FAIL_V(ERR_UNAVAILABLE);
- }
- mutex = Mutex::create();
- thread = Thread::create(AudioDriverXAudio2::thread_func, this);
- return OK;
- };
- void AudioDriverXAudio2::thread_func(void *p_udata) {
- AudioDriverXAudio2 *ad = (AudioDriverXAudio2 *)p_udata;
- uint64_t usdelay = (ad->buffer_size / float(ad->mix_rate)) * 1000000;
- while (!ad->exit_thread) {
- if (!ad->active) {
- for (int i = 0; i < AUDIO_BUFFERS; i++) {
- ad->xaudio_buffer[i].Flags = XAUDIO2_END_OF_STREAM;
- }
- } else {
- ad->lock();
- ad->audio_server_process(ad->buffer_size, ad->samples_in);
- 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);
- }
- }
- };
- ad->thread_exited = true;
- };
- void AudioDriverXAudio2::start() {
- active = true;
- HRESULT hr = source_voice->Start(0);
- if (hr != S_OK) {
- ERR_EXPLAIN("XAudio2 start error " + itos(hr));
- ERR_FAIL();
- }
- };
- 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() {
- if (!thread || !mutex)
- return;
- mutex->lock();
- };
- void AudioDriverXAudio2::unlock() {
- if (!thread || !mutex)
- return;
- mutex->unlock();
- };
- void AudioDriverXAudio2::finish() {
- if (!thread)
- return;
- exit_thread = true;
- Thread::wait_to_finish(thread);
- 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();
- memdelete(thread);
- if (mutex)
- memdelete(mutex);
- thread = NULL;
- };
- AudioDriverXAudio2::AudioDriverXAudio2() {
- mutex = NULL;
- thread = NULL;
- wave_format = { 0 };
- for (int i = 0; i < AUDIO_BUFFERS; i++) {
- xaudio_buffer[i] = { 0 };
- samples_out[i] = 0;
- }
- current_buffer = 0;
- };
- AudioDriverXAudio2::~AudioDriverXAudio2(){
- };
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