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/*************************************************************************/
/* audio_driver_pulseaudio.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_driver_pulseaudio.h"
#ifdef PULSEAUDIO_ENABLED
#include <pulse/error.h>
#include "project_settings.h"
Error AudioDriverPulseAudio::init() {
active = false;
thread_exited = false;
exit_thread = false;
pcm_open = false;
samples_in = NULL;
samples_out = NULL;
mix_rate = GLOBAL_DEF("audio/mix_rate", 44100);
speaker_mode = SPEAKER_MODE_STEREO;
channels = 2;
pa_sample_spec spec;
spec.format = PA_SAMPLE_S16LE;
spec.channels = channels;
spec.rate = mix_rate;
int latency = GLOBAL_DEF("audio/output_latency", 25);
buffer_size = closest_power_of_2(latency * mix_rate / 1000);
pa_buffer_attr attr;
// set to appropriate buffer size from global settings
attr.tlength = buffer_size;
// set them to be automatically chosen
attr.prebuf = (uint32_t)-1;
attr.maxlength = (uint32_t)-1;
attr.minreq = (uint32_t)-1;
int error_code;
pulse = pa_simple_new(NULL, // default server
"Godot", // application name
PA_STREAM_PLAYBACK,
NULL, // default device
"Sound", // stream description
&spec,
NULL, // use default channel map
&attr, // use buffering attributes from above
&error_code);
if (pulse == NULL) {
fprintf(stderr, "PulseAudio ERR: %s\n", pa_strerror(error_code));
ERR_FAIL_COND_V(pulse == NULL, ERR_CANT_OPEN);
}
samples_in = memnew_arr(int32_t, buffer_size * channels);
samples_out = memnew_arr(int16_t, buffer_size * channels);
mutex = Mutex::create();
thread = Thread::create(AudioDriverPulseAudio::thread_func, this);
return OK;
}
float AudioDriverPulseAudio::get_latency() {
if (latency == 0) { //only do this once since it's approximate anyway
int error_code;
pa_usec_t palat = pa_simple_get_latency(pulse, &error_code);
latency = double(palat) / 1000000.0;
}
return latency;
}
void AudioDriverPulseAudio::thread_func(void *p_udata) {
AudioDriverPulseAudio *ad = (AudioDriverPulseAudio *)p_udata;
while (!ad->exit_thread) {
if (!ad->active) {
for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
ad->samples_out[i] = 0;
}
} else {
ad->lock();
ad->audio_server_process(ad->buffer_size, ad->samples_in);
ad->unlock();
for (unsigned int i = 0; i < ad->buffer_size * ad->channels; i++) {
ad->samples_out[i] = ad->samples_in[i] >> 16;
}
}
// pa_simple_write always consumes the entire buffer
int error_code;
int byte_size = ad->buffer_size * sizeof(int16_t) * ad->channels;
if (pa_simple_write(ad->pulse, ad->samples_out, byte_size, &error_code) < 0) {
// can't recover here
fprintf(stderr, "PulseAudio failed and can't recover: %s\n", pa_strerror(error_code));
ad->active = false;
ad->exit_thread = true;
break;
}
}
ad->thread_exited = true;
}
void AudioDriverPulseAudio::start() {
active = true;
}
int AudioDriverPulseAudio::get_mix_rate() const {
return mix_rate;
}
AudioDriver::SpeakerMode AudioDriverPulseAudio::get_speaker_mode() const {
return speaker_mode;
}
void AudioDriverPulseAudio::lock() {
if (!thread || !mutex)
return;
mutex->lock();
}
void AudioDriverPulseAudio::unlock() {
if (!thread || !mutex)
return;
mutex->unlock();
}
void AudioDriverPulseAudio::finish() {
if (!thread)
return;
exit_thread = true;
Thread::wait_to_finish(thread);
if (pulse)
pa_simple_free(pulse);
if (samples_in) {
memdelete_arr(samples_in);
memdelete_arr(samples_out);
};
memdelete(thread);
if (mutex) {
memdelete(mutex);
mutex = NULL;
}
thread = NULL;
}
AudioDriverPulseAudio::AudioDriverPulseAudio() {
mutex = NULL;
thread = NULL;
pulse = NULL;
latency = 0;
}
AudioDriverPulseAudio::~AudioDriverPulseAudio() {
}
#endif
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