143 lines
4.1 KiB
C++
143 lines
4.1 KiB
C++
/*************************************************************************/
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/* audio_driver_ao.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) 2007-2014 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_ao.h"
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#include "globals.h"
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#include "os/os.h"
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Error AudioDriverAO::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 = 44100;
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output_format = OUTPUT_STEREO;
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channels = 2;
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ao_sample_format format;
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format.bits = 16;
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format.rate = mix_rate;
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format.channels = channels;
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format.byte_format = AO_FMT_LITTLE;
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format.matrix = "L,R";
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device = ao_open_live(ao_default_driver_id(), &format, 0);
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ERR_FAIL_COND_V(device == 0, ERR_CANT_OPEN);
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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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mutex = Mutex::create();
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thread = Thread::create(AudioDriverAO::thread_func, this);
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return OK;
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};
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void AudioDriverAO::thread_func(void* p_udata) {
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AudioDriverAO* ad = (AudioDriverAO*)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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} 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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};
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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 AudioDriverAO::start() {
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active = true;
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};
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int AudioDriverAO::get_mix_rate() const {
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return mix_rate;
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};
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AudioDriverSW::OutputFormat AudioDriverAO::get_output_format() const {
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return output_format;
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};
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void AudioDriverAO::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 AudioDriverAO::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 AudioDriverAO::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 (samples_in) {
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memdelete_arr(samples_in);
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};
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memdelete(thread);
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if (mutex)
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memdelete(mutex);
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if (device)
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ao_close(device);
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thread = NULL;
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};
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AudioDriverAO::AudioDriverAO() {
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mutex = NULL;
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thread = NULL;
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ao_initialize();
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};
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AudioDriverAO::~AudioDriverAO() {
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ao_shutdown();
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};
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