151 lines
4.6 KiB
C++
151 lines
4.6 KiB
C++
/*************************************************************************/
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/* audio_driver_dummy.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 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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#include "audio_driver_dummy.h"
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#include "core/config/project_settings.h"
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#include "core/os/os.h"
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AudioDriverDummy *AudioDriverDummy::singleton = nullptr;
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Error AudioDriverDummy::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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samples_in = nullptr;
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if (mix_rate == -1) {
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mix_rate = GLOBAL_GET("audio/driver/mix_rate");
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}
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channels = get_channels();
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samples_in = memnew_arr(int32_t, (size_t)buffer_frames * channels);
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if (use_threads) {
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thread.start(AudioDriverDummy::thread_func, this);
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}
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return OK;
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};
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void AudioDriverDummy::thread_func(void *p_udata) {
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AudioDriverDummy *ad = static_cast<AudioDriverDummy *>(p_udata);
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uint64_t usdelay = (ad->buffer_frames / float(ad->mix_rate)) * 1000000;
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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);
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ad->unlock();
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};
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OS::get_singleton()->delay_usec(usdelay);
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};
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ad->thread_exited = true;
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};
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void AudioDriverDummy::start() {
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active = true;
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};
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int AudioDriverDummy::get_mix_rate() const {
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return mix_rate;
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};
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AudioDriver::SpeakerMode AudioDriverDummy::get_speaker_mode() const {
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return speaker_mode;
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};
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void AudioDriverDummy::lock() {
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mutex.lock();
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};
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void AudioDriverDummy::unlock() {
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mutex.unlock();
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};
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void AudioDriverDummy::set_use_threads(bool p_use_threads) {
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use_threads = p_use_threads;
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}
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void AudioDriverDummy::set_speaker_mode(SpeakerMode p_mode) {
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speaker_mode = p_mode;
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}
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void AudioDriverDummy::set_mix_rate(int p_rate) {
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mix_rate = p_rate;
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}
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uint32_t AudioDriverDummy::get_channels() const {
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static const int channels_for_mode[4] = { 2, 4, 8, 16 };
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return channels_for_mode[speaker_mode];
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}
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void AudioDriverDummy::mix_audio(int p_frames, int32_t *p_buffer) {
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ERR_FAIL_COND(!active); // If not active, should not mix.
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ERR_FAIL_COND(use_threads == true); // If using threads, this will not work well.
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uint32_t todo = p_frames;
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while (todo) {
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uint32_t to_mix = MIN(buffer_frames, todo);
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lock();
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audio_server_process(to_mix, samples_in);
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unlock();
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uint32_t total_samples = to_mix * channels;
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for (uint32_t i = 0; i < total_samples; i++) {
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p_buffer[i] = samples_in[i];
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}
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todo -= to_mix;
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p_buffer += total_samples;
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}
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}
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void AudioDriverDummy::finish() {
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if (use_threads) {
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exit_thread = true;
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thread.wait_to_finish();
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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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}
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AudioDriverDummy::AudioDriverDummy() {
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singleton = this;
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}
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