206 lines
5.7 KiB
C++
206 lines
5.7 KiB
C++
/*************************************************************************/
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/* audio_driver_pulseaudio.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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#include "audio_driver_pulseaudio.h"
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#ifdef PULSEAUDIO_ENABLED
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#include <pulse/error.h>
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#include "globals.h"
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Error AudioDriverPulseAudio::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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samples_out = NULL;
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mix_rate = GLOBAL_DEF("audio/mix_rate", 44100);
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output_format = OUTPUT_STEREO;
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channels = 2;
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pa_sample_spec spec;
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spec.format = PA_SAMPLE_S16LE;
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spec.channels = channels;
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spec.rate = mix_rate;
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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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pa_buffer_attr attr;
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// set to appropriate buffer size from global settings
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attr.tlength = buffer_size;
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// set them to be automatically chosen
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attr.prebuf = (uint32_t)-1;
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attr.maxlength = (uint32_t)-1;
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attr.minreq = (uint32_t)-1;
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int error_code;
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pulse = pa_simple_new(NULL, // default server
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"Godot", // application name
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PA_STREAM_PLAYBACK,
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NULL, // default device
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"Sound", // stream description
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&spec,
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NULL, // use default channel map
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&attr, // use buffering attributes from above
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&error_code);
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if (pulse == NULL) {
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fprintf(stderr, "PulseAudio ERR: %s\n", pa_strerror(error_code));
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ERR_FAIL_COND_V(pulse == NULL, ERR_CANT_OPEN);
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}
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samples_in = memnew_arr(int32_t, buffer_size * channels);
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samples_out = memnew_arr(int16_t, buffer_size * channels);
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mutex = Mutex::create();
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thread = Thread::create(AudioDriverPulseAudio::thread_func, this);
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return OK;
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}
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float AudioDriverPulseAudio::get_latency() {
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if (latency == 0) { //only do this once since it's approximate anyway
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int error_code;
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pa_usec_t palat = pa_simple_get_latency(pulse, &error_code);
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latency = double(palat) / 1000000.0;
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}
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return latency;
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}
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void AudioDriverPulseAudio::thread_func(void *p_udata) {
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AudioDriverPulseAudio *ad = (AudioDriverPulseAudio *)p_udata;
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while (!ad->exit_thread) {
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if (!ad->active) {
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for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
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ad->samples_out[i] = 0;
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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[i] = ad->samples_in[i] >> 16;
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}
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}
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// pa_simple_write always consumes the entire buffer
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int error_code;
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int byte_size = ad->buffer_size * sizeof(int16_t) * ad->channels;
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if (pa_simple_write(ad->pulse, ad->samples_out, byte_size, &error_code) < 0) {
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// can't recover here
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fprintf(stderr, "PulseAudio failed and can't recover: %s\n", pa_strerror(error_code));
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ad->active = false;
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ad->exit_thread = true;
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break;
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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 AudioDriverPulseAudio::start() {
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active = true;
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}
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int AudioDriverPulseAudio::get_mix_rate() const {
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return mix_rate;
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}
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AudioDriverSW::OutputFormat AudioDriverPulseAudio::get_output_format() const {
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return output_format;
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}
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void AudioDriverPulseAudio::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 AudioDriverPulseAudio::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 AudioDriverPulseAudio::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 (pulse)
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pa_simple_free(pulse);
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if (samples_in) {
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memdelete_arr(samples_in);
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memdelete_arr(samples_out);
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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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mutex = NULL;
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}
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thread = NULL;
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}
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AudioDriverPulseAudio::AudioDriverPulseAudio() {
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mutex = NULL;
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thread = NULL;
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pulse = NULL;
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latency = 0;
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}
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AudioDriverPulseAudio::~AudioDriverPulseAudio() {
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}
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#endif
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