233 lines
7.5 KiB
C++
233 lines
7.5 KiB
C++
/*************************************************************************/
|
|
/* audio_driver_rtaudio.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2018 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_rtaudio.h"
|
|
|
|
#include "globals.h"
|
|
#include "os/os.h"
|
|
|
|
#ifdef RTAUDIO_ENABLED
|
|
|
|
const char *AudioDriverRtAudio::get_name() const {
|
|
|
|
#ifdef OSX_ENABLED
|
|
return "RtAudio-OSX";
|
|
#elif defined(UNIX_ENABLED)
|
|
return "RtAudio-ALSA";
|
|
#elif defined(WINDOWS_ENABLED)
|
|
return "RtAudio-DirectSound";
|
|
#else
|
|
return "RtAudio-None";
|
|
#endif
|
|
}
|
|
|
|
int AudioDriverRtAudio::callback(void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames, double streamTime, RtAudioStreamStatus status, void *userData) {
|
|
|
|
if (status) {
|
|
if (status & RTAUDIO_INPUT_OVERFLOW) {
|
|
WARN_PRINT("RtAudio input overflow!");
|
|
}
|
|
if (status & RTAUDIO_OUTPUT_UNDERFLOW) {
|
|
WARN_PRINT("RtAudio output underflow!");
|
|
}
|
|
}
|
|
int32_t *buffer = (int32_t *)outputBuffer;
|
|
|
|
AudioDriverRtAudio *self = (AudioDriverRtAudio *)userData;
|
|
|
|
if (self->mutex->try_lock() != OK) {
|
|
// what should i do..
|
|
for (unsigned int i = 0; i < nBufferFrames; i++)
|
|
buffer[i] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
self->audio_server_process(nBufferFrames, buffer);
|
|
|
|
self->mutex->unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
Error AudioDriverRtAudio::init() {
|
|
|
|
active = false;
|
|
mutex = NULL;
|
|
dac = memnew(RtAudio);
|
|
|
|
ERR_EXPLAIN("Cannot initialize RtAudio audio driver: No devices present.")
|
|
ERR_FAIL_COND_V(dac->getDeviceCount() < 1, ERR_UNAVAILABLE);
|
|
|
|
String channels = GLOBAL_DEF("audio/output", "stereo");
|
|
|
|
if (channels == "5.1")
|
|
output_format = OUTPUT_5_1;
|
|
else if (channels == "quad")
|
|
output_format = OUTPUT_QUAD;
|
|
else if (channels == "mono")
|
|
output_format = OUTPUT_MONO;
|
|
else
|
|
output_format = OUTPUT_STEREO;
|
|
|
|
RtAudio::StreamParameters parameters;
|
|
parameters.deviceId = dac->getDefaultOutputDevice();
|
|
RtAudio::StreamOptions options;
|
|
|
|
// set the desired numberOfBuffers
|
|
unsigned int target_number_of_buffers = 4;
|
|
options.numberOfBuffers = target_number_of_buffers;
|
|
|
|
// options.
|
|
// RtAudioStreamFlags flags; /*!< A bit-mask of stream flags (RTAUDIO_NONINTERLEAVED, RTAUDIO_MINIMIZE_LATENCY, RTAUDIO_HOG_DEVICE). *///
|
|
// unsigned int numberOfBuffers; /*!< Number of stream buffers. */
|
|
// std::string streamName; /*!< A stream name (currently used only in Jack). */
|
|
// int priority; /*!< Scheduling priority of callback thread (only used with flag RTAUDIO_SCHEDULE_REALTIME). */
|
|
|
|
parameters.firstChannel = 0;
|
|
mix_rate = GLOBAL_DEF("audio/mix_rate", 44100);
|
|
|
|
int latency = GLOBAL_DEF("audio/output_latency", 25);
|
|
// calculate desired buffer_size, taking the desired numberOfBuffers into account (latency depends on numberOfBuffers*buffer_size)
|
|
unsigned int buffer_size = next_power_of_2(latency * mix_rate / 1000 / target_number_of_buffers);
|
|
|
|
if (OS::get_singleton()->is_stdout_verbose()) {
|
|
print_line("audio buffer size: " + itos(buffer_size));
|
|
}
|
|
|
|
short int tries = 2;
|
|
|
|
while (true) {
|
|
while (true) {
|
|
switch (output_format) {
|
|
case OUTPUT_MONO: parameters.nChannels = 1; break;
|
|
case OUTPUT_STEREO: parameters.nChannels = 2; break;
|
|
case OUTPUT_QUAD: parameters.nChannels = 4; break;
|
|
case OUTPUT_5_1: parameters.nChannels = 6; break;
|
|
};
|
|
|
|
try {
|
|
dac->openStream(¶meters, NULL, RTAUDIO_SINT32, mix_rate, &buffer_size, &callback, this, &options);
|
|
mutex = Mutex::create(true);
|
|
active = true;
|
|
|
|
break;
|
|
} catch (RtAudioError &e) {
|
|
// try with less channels
|
|
ERR_PRINT("Unable to open audio, retrying with fewer channels..");
|
|
|
|
switch (output_format) {
|
|
case OUTPUT_MONO:
|
|
ERR_EXPLAIN("Unable to open audio.");
|
|
ERR_FAIL_V(ERR_UNAVAILABLE);
|
|
break;
|
|
case OUTPUT_STEREO: output_format = OUTPUT_MONO; break;
|
|
case OUTPUT_QUAD: output_format = OUTPUT_STEREO; break;
|
|
case OUTPUT_5_1: output_format = OUTPUT_QUAD; break;
|
|
};
|
|
}
|
|
}
|
|
|
|
// compare actual numberOfBuffers with the desired one. If not equal, close and reopen the stream with adjusted buffer size, so the desired output_latency is still correct
|
|
if (target_number_of_buffers != options.numberOfBuffers) {
|
|
if (tries <= 0) {
|
|
ERR_EXPLAIN("RtAudio: Unable to set correct number of buffers.");
|
|
ERR_FAIL_V(ERR_UNAVAILABLE);
|
|
break;
|
|
}
|
|
|
|
try {
|
|
dac->closeStream();
|
|
} catch (RtAudioError &e) {
|
|
ERR_PRINT(e.what());
|
|
ERR_FAIL_V(ERR_UNAVAILABLE);
|
|
break;
|
|
}
|
|
if (OS::get_singleton()->is_stdout_verbose())
|
|
print_line("RtAudio: Desired number of buffers (" + itos(target_number_of_buffers) + ") not available. Using " + itos(options.numberOfBuffers) + " instead. Reopening stream with adjusted buffer_size.");
|
|
|
|
// new buffer size dependent on the ratio between set and actual numberOfBuffers
|
|
buffer_size = buffer_size / (options.numberOfBuffers / target_number_of_buffers);
|
|
target_number_of_buffers = options.numberOfBuffers;
|
|
tries--;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
int AudioDriverRtAudio::get_mix_rate() const {
|
|
|
|
return mix_rate;
|
|
}
|
|
|
|
AudioDriverSW::OutputFormat AudioDriverRtAudio::get_output_format() const {
|
|
|
|
return output_format;
|
|
}
|
|
|
|
void AudioDriverRtAudio::start() {
|
|
|
|
if (active)
|
|
dac->startStream();
|
|
}
|
|
|
|
void AudioDriverRtAudio::lock() {
|
|
|
|
if (mutex)
|
|
mutex->lock();
|
|
}
|
|
|
|
void AudioDriverRtAudio::unlock() {
|
|
|
|
if (mutex)
|
|
mutex->unlock();
|
|
}
|
|
|
|
void AudioDriverRtAudio::finish() {
|
|
|
|
if (active && dac->isStreamOpen())
|
|
dac->closeStream();
|
|
if (mutex)
|
|
memdelete(mutex);
|
|
if (dac)
|
|
memdelete(dac);
|
|
}
|
|
|
|
AudioDriverRtAudio::AudioDriverRtAudio() {
|
|
|
|
active = false;
|
|
mutex = NULL;
|
|
mix_rate = 44100;
|
|
output_format = OUTPUT_STEREO;
|
|
}
|
|
|
|
#endif
|