366 lines
10 KiB
C++
366 lines
10 KiB
C++
/*************************************************************************/
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/* audio_driver_wasapi.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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
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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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#ifdef WASAPI_ENABLED
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#include "audio_driver_wasapi.h"
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#include "os/os.h"
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#include "project_settings.h"
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const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
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const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
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const IID IID_IAudioClient = __uuidof(IAudioClient);
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const IID IID_IAudioRenderClient = __uuidof(IAudioRenderClient);
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Error AudioDriverWASAPI::init_device() {
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WAVEFORMATEX *pwfex;
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IMMDeviceEnumerator *enumerator = NULL;
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IMMDevice *device = NULL;
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CoInitialize(NULL);
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HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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hr = enumerator->GetDefaultAudioEndpoint(eRender, eConsole, &device);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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hr = device->Activate(IID_IAudioClient, CLSCTX_ALL, NULL, (void **)&audio_client);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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hr = audio_client->GetMixFormat(&pwfex);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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// Since we're using WASAPI Shared Mode we can't control any of these, we just tag along
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channels = pwfex->nChannels;
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mix_rate = pwfex->nSamplesPerSec;
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format_tag = pwfex->wFormatTag;
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bits_per_sample = pwfex->wBitsPerSample;
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switch (channels) {
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case 2: // Stereo
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case 4: // Surround 3.1
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case 6: // Surround 5.1
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case 8: // Surround 7.1
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break;
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default:
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ERR_PRINTS("WASAPI: Unsupported number of channels: " + itos(channels));
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ERR_FAIL_V(ERR_CANT_OPEN);
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break;
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}
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if (format_tag == WAVE_FORMAT_EXTENSIBLE) {
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WAVEFORMATEXTENSIBLE *wfex = (WAVEFORMATEXTENSIBLE *)pwfex;
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if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_PCM) {
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format_tag = WAVE_FORMAT_PCM;
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} else if (wfex->SubFormat == KSDATAFORMAT_SUBTYPE_IEEE_FLOAT) {
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format_tag = WAVE_FORMAT_IEEE_FLOAT;
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} else {
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ERR_PRINT("WASAPI: Format not supported");
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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} else {
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if (format_tag != WAVE_FORMAT_PCM && format_tag != WAVE_FORMAT_IEEE_FLOAT) {
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ERR_PRINT("WASAPI: Format not supported");
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ERR_FAIL_V(ERR_CANT_OPEN);
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}
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}
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hr = audio_client->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK, 0, 0, pwfex, NULL);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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event = CreateEvent(NULL, FALSE, FALSE, NULL);
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ERR_FAIL_COND_V(event == NULL, ERR_CANT_OPEN);
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hr = audio_client->SetEventHandle(event);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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hr = audio_client->GetService(IID_IAudioRenderClient, (void **)&render_client);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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UINT32 max_frames;
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hr = audio_client->GetBufferSize(&max_frames);
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ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
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// Due to WASAPI Shared Mode we have no control of the buffer size
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buffer_frames = max_frames;
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// Sample rate is independent of channels (ref: https://stackoverflow.com/questions/11048825/audio-sample-frequency-rely-on-channels)
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buffer_size = buffer_frames * channels;
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samples_in.resize(buffer_size);
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if (OS::get_singleton()->is_stdout_verbose()) {
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print_line("WASAPI: detected " + itos(channels) + " channels");
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print_line("WASAPI: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
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}
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return OK;
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}
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Error AudioDriverWASAPI::finish_device() {
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if (audio_client) {
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if (active) {
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audio_client->Stop();
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active = false;
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}
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}
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if (render_client) {
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render_client->Release();
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render_client = NULL;
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}
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if (audio_client) {
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audio_client->Release();
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audio_client = NULL;
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}
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return OK;
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}
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Error AudioDriverWASAPI::init() {
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Error err = init_device();
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ERR_FAIL_COND_V(err != OK, err);
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active = false;
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exit_thread = false;
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thread_exited = false;
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mutex = Mutex::create(true);
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thread = Thread::create(thread_func, this);
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return OK;
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}
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Error AudioDriverWASAPI::reopen() {
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Error err = finish_device();
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if (err != OK) {
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ERR_PRINT("WASAPI: finish_device error");
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} else {
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err = init_device();
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if (err != OK) {
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ERR_PRINT("WASAPI: init_device error");
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} else {
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start();
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}
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}
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return err;
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}
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int AudioDriverWASAPI::get_mix_rate() const {
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return mix_rate;
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}
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AudioDriver::SpeakerMode AudioDriverWASAPI::get_speaker_mode() const {
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return get_speaker_mode_by_total_channels(channels);
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}
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void AudioDriverWASAPI::thread_func(void *p_udata) {
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AudioDriverWASAPI *ad = (AudioDriverWASAPI *)p_udata;
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while (!ad->exit_thread) {
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if (ad->active) {
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ad->lock();
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ad->audio_server_process(ad->buffer_frames, ad->samples_in.ptr());
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ad->unlock();
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} else {
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for (unsigned int i = 0; i < ad->buffer_size; i++) {
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ad->samples_in[i] = 0;
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}
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}
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unsigned int left_frames = ad->buffer_frames;
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unsigned int buffer_idx = 0;
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while (left_frames > 0) {
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WaitForSingleObject(ad->event, 1000);
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UINT32 cur_frames;
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HRESULT hr = ad->audio_client->GetCurrentPadding(&cur_frames);
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if (hr == S_OK) {
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// Check how much frames are available on the WASAPI buffer
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UINT32 avail_frames = ad->buffer_frames - cur_frames;
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UINT32 write_frames = avail_frames > left_frames ? left_frames : avail_frames;
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BYTE *buffer = NULL;
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hr = ad->render_client->GetBuffer(write_frames, &buffer);
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if (hr == S_OK) {
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// We're using WASAPI Shared Mode so we must convert the buffer
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if (ad->format_tag == WAVE_FORMAT_PCM) {
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switch (ad->bits_per_sample) {
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case 8:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int8_t *)buffer)[i] = ad->samples_in[buffer_idx++] >> 24;
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}
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break;
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case 16:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int16_t *)buffer)[i] = ad->samples_in[buffer_idx++] >> 16;
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}
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break;
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case 24:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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int32_t sample = ad->samples_in[buffer_idx++];
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((int8_t *)buffer)[i * 3 + 2] = sample >> 24;
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((int8_t *)buffer)[i * 3 + 1] = sample >> 16;
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((int8_t *)buffer)[i * 3 + 0] = sample >> 8;
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}
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break;
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case 32:
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((int32_t *)buffer)[i] = ad->samples_in[buffer_idx++];
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}
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break;
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}
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} else if (ad->format_tag == WAVE_FORMAT_IEEE_FLOAT) {
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for (unsigned int i = 0; i < write_frames * ad->channels; i++) {
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((float *)buffer)[i] = (ad->samples_in[buffer_idx++] >> 16) / 32768.f;
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}
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} else {
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ERR_PRINT("WASAPI: Unknown format tag");
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ad->exit_thread = true;
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}
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hr = ad->render_client->ReleaseBuffer(write_frames, 0);
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if (hr != S_OK) {
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ERR_PRINT("WASAPI: Release buffer error");
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}
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left_frames -= write_frames;
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} else if (hr == AUDCLNT_E_DEVICE_INVALIDATED) {
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// Device is not valid anymore, reopen it
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Error err = ad->reopen();
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if (err != OK) {
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ad->exit_thread = true;
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} else {
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// We reopened the device and samples_in may have resized, so invalidate the current left_frames
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left_frames = 0;
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}
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} else {
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ERR_PRINT("WASAPI: Get buffer error");
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ad->exit_thread = true;
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}
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} else if (hr == AUDCLNT_E_DEVICE_INVALIDATED) {
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// Device is not valid anymore, reopen it
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Error err = ad->reopen();
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if (err != OK) {
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ad->exit_thread = true;
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} else {
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// We reopened the device and samples_in may have resized, so invalidate the current left_frames
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left_frames = 0;
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}
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} else {
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ERR_PRINT("WASAPI: GetCurrentPadding error");
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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 AudioDriverWASAPI::start() {
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HRESULT hr = audio_client->Start();
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if (hr != S_OK) {
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ERR_PRINT("WASAPI: Start failed");
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} else {
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active = true;
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}
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}
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void AudioDriverWASAPI::lock() {
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if (mutex)
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mutex->lock();
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}
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void AudioDriverWASAPI::unlock() {
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if (mutex)
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mutex->unlock();
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}
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void AudioDriverWASAPI::finish() {
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if (thread) {
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exit_thread = true;
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Thread::wait_to_finish(thread);
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memdelete(thread);
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thread = NULL;
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}
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finish_device();
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if (mutex) {
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memdelete(mutex);
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mutex = NULL;
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}
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}
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AudioDriverWASAPI::AudioDriverWASAPI() {
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audio_client = NULL;
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render_client = NULL;
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mutex = NULL;
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thread = NULL;
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format_tag = 0;
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bits_per_sample = 0;
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samples_in.clear();
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buffer_size = 0;
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channels = 0;
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mix_rate = 0;
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buffer_frames = 0;
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thread_exited = false;
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exit_thread = false;
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active = false;
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}
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#endif
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