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+/*************************************************************************/
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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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+/* Copyright (c) 2014 Anton Yabchinskiy. */
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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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+
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+#ifdef AO_ENABLED
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+
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+#include "globals.h"
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+#include "os/os.h"
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+
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+#include <cstring>
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+
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+Error AudioDriverAO::init() {
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+
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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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+
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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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+
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+ ao_sample_format format;
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+
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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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+
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+ device = ao_open_live(ao_default_driver_id(), &format, NULL);
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+ ERR_FAIL_COND_V(device == NULL, ERR_CANT_OPEN);
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+
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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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+
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+ samples_in = memnew_arr(int32_t, buffer_size * channels);
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+
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+ mutex = Mutex::create();
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+ thread = Thread::create(AudioDriverAO::thread_func, this);
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+
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+ return OK;
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+};
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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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+
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+ // Overwrite samples on conversion
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+ int16_t* samples_out = reinterpret_cast<int16_t*>(ad->samples_in);
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+ unsigned int n_samples = ad->buffer_size * ad->channels;
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+ unsigned int n_bytes = n_samples * sizeof(int16_t);
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+
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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_size, ad->samples_in);
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+ ad->unlock();
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+
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+ for (unsigned int i = 0; i < n_samples; i++) {
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+ samples_out[i] = ad->samples_in[i] >> 16;
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+ }
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+ } else {
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+ memset(samples_out, 0, n_bytes);
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+ }
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+
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+ if (ad->exit_thread)
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+ break;
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+
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+ if (!ao_play(ad->device, reinterpret_cast<char*>(samples_out), n_bytes)) {
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+ ERR_PRINT("ao_play() failed");
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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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+
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+void AudioDriverAO::start() {
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+ active = true;
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+};
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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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+
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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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+
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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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+
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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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+
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+void AudioDriverAO::finish() {
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+ if (!thread)
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+ return;
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+
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+ exit_thread = true;
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+ Thread::wait_to_finish(thread);
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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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+ memdelete(thread);
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+ if (mutex)
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+ memdelete(mutex);
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+
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+ if (device)
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+ ao_close(device);
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+
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+ thread = NULL;
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+};
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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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+
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+ ao_initialize();
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+};
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+
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+AudioDriverAO::~AudioDriverAO() {
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+ ao_shutdown();
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+};
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+
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+#endif
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Juan Linietsky