235 lines
6.8 KiB
C++
235 lines
6.8 KiB
C++
/*************************************************************************/
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/* audio_driver_winrt.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_driver_winrt.h"
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#include "globals.h"
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#include "os/os.h"
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using namespace Windows::Media;
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using namespace Windows::Media::Core;
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using namespace Windows::Media::MediaProperties;
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using namespace Windows::Media::Editing;
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using namespace Windows::Foundation;
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const char *AudioDriverWinRT::get_name() const {
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return "WinRT";
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}
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Error AudioDriverWinRT::init() {
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active = false;
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thread_exited = false;
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exit_thread = false;
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pcm_open = false;
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samples_in = NULL;
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mix_rate = 48000;
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output_format = OUTPUT_STEREO;
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channels = 2;
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int latency = GLOBAL_DEF("audio/output_latency", 25);
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buffer_size = nearest_power_of_2(latency * mix_rate / 1000);
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samples_in = memnew_arr(int32_t, buffer_size * channels);
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for (int i = 0; i < AUDIO_BUFFERS; i++) {
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samples_out[i] = memnew_arr(int16_t, buffer_size * channels);
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xaudio_buffer[i].AudioBytes = buffer_size * channels * sizeof(int16_t);
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xaudio_buffer[i].pAudioData = (const BYTE *)(samples_out[i]);
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xaudio_buffer[i].Flags = 0;
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}
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HRESULT hr;
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hr = XAudio2Create(&xaudio, 0, XAUDIO2_DEFAULT_PROCESSOR);
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if (hr != S_OK) {
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ERR_EXPLAIN("Error creating XAudio2 engine.");
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ERR_FAIL_V(ERR_UNAVAILABLE);
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}
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hr = xaudio->CreateMasteringVoice(&mastering_voice);
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if (hr != S_OK) {
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ERR_EXPLAIN("Error creating XAudio2 mastering voice.");
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ERR_FAIL_V(ERR_UNAVAILABLE);
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}
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wave_format.nChannels = channels;
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wave_format.cbSize = 0;
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wave_format.nSamplesPerSec = mix_rate;
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wave_format.wFormatTag = WAVE_FORMAT_PCM;
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wave_format.wBitsPerSample = 16;
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wave_format.nBlockAlign = channels * wave_format.wBitsPerSample >> 3;
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wave_format.nAvgBytesPerSec = mix_rate * wave_format.nBlockAlign;
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voice_callback = memnew(XAudio2DriverVoiceCallback);
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hr = xaudio->CreateSourceVoice(&source_voice, &wave_format, 0, XAUDIO2_MAX_FREQ_RATIO, voice_callback);
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if (hr != S_OK) {
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ERR_EXPLAIN("Error creating XAudio2 source voice. " + itos(hr));
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ERR_FAIL_V(ERR_UNAVAILABLE);
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}
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mutex = Mutex::create();
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thread = Thread::create(AudioDriverWinRT::thread_func, this);
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return OK;
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};
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void AudioDriverWinRT::thread_func(void *p_udata) {
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AudioDriverWinRT *ad = (AudioDriverWinRT *)p_udata;
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uint64_t usdelay = (ad->buffer_size / float(ad->mix_rate)) * 1000000;
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while (!ad->exit_thread) {
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if (!ad->active) {
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for (int i = 0; i < AUDIO_BUFFERS; i++) {
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ad->xaudio_buffer[i].Flags = XAUDIO2_END_OF_STREAM;
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}
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} else {
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ad->lock();
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ad->audio_server_process(ad->buffer_size, ad->samples_in);
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ad->unlock();
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for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
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ad->samples_out[ad->current_buffer][i] = ad->samples_in[i] >> 16;
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}
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ad->xaudio_buffer[ad->current_buffer].Flags = 0;
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ad->xaudio_buffer[ad->current_buffer].AudioBytes = ad->buffer_size * ad->channels * sizeof(int16_t);
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ad->xaudio_buffer[ad->current_buffer].pAudioData = (const BYTE *)(ad->samples_out[ad->current_buffer]);
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ad->xaudio_buffer[ad->current_buffer].PlayBegin = 0;
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ad->source_voice->SubmitSourceBuffer(&(ad->xaudio_buffer[ad->current_buffer]));
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ad->current_buffer = (ad->current_buffer + 1) % AUDIO_BUFFERS;
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XAUDIO2_VOICE_STATE state;
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while (ad->source_voice->GetState(&state), state.BuffersQueued > AUDIO_BUFFERS - 1) {
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WaitForSingleObject(ad->voice_callback->buffer_end_event, INFINITE);
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}
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}
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};
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ad->thread_exited = true;
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};
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void AudioDriverWinRT::start() {
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active = true;
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HRESULT hr = source_voice->Start(0);
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if (hr != S_OK) {
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ERR_EXPLAIN("XAudio2 start error " + itos(hr));
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ERR_FAIL();
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}
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};
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int AudioDriverWinRT::get_mix_rate() const {
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return mix_rate;
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};
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AudioDriverSW::OutputFormat AudioDriverWinRT::get_output_format() const {
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return output_format;
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};
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float AudioDriverWinRT::get_latency() {
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XAUDIO2_PERFORMANCE_DATA perf_data;
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xaudio->GetPerformanceData(&perf_data);
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if (perf_data.CurrentLatencyInSamples) {
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return (float)(perf_data.CurrentLatencyInSamples / ((float)mix_rate));
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} else {
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return 0;
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}
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}
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void AudioDriverWinRT::lock() {
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if (!thread || !mutex)
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return;
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mutex->lock();
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};
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void AudioDriverWinRT::unlock() {
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if (!thread || !mutex)
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return;
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mutex->unlock();
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};
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void AudioDriverWinRT::finish() {
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if (!thread)
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return;
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exit_thread = true;
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Thread::wait_to_finish(thread);
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if (source_voice) {
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source_voice->Stop(0);
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memdelete(source_voice);
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}
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if (samples_in) {
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memdelete_arr(samples_in);
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};
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if (samples_out[0]) {
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for (int i = 0; i < AUDIO_BUFFERS; i++) {
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memdelete_arr(samples_out[i]);
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}
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};
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memdelete(voice_callback);
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memdelete(mastering_voice);
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memdelete(thread);
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if (mutex)
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memdelete(mutex);
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thread = NULL;
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};
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AudioDriverWinRT::AudioDriverWinRT() {
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mutex = NULL;
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thread = NULL;
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wave_format = { 0 };
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for (int i = 0; i < AUDIO_BUFFERS; i++) {
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xaudio_buffer[i] = { 0 };
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samples_out[i] = 0;
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}
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current_buffer = 0;
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};
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AudioDriverWinRT::~AudioDriverWinRT(){
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};
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