diff options
Diffstat (limited to 'drivers/pulseaudio/audio_driver_pulseaudio.cpp')
| -rw-r--r-- | drivers/pulseaudio/audio_driver_pulseaudio.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/pulseaudio/audio_driver_pulseaudio.cpp b/drivers/pulseaudio/audio_driver_pulseaudio.cpp new file mode 100644 index 0000000000..dfe9ddc55f --- /dev/null +++ b/drivers/pulseaudio/audio_driver_pulseaudio.cpp @@ -0,0 +1,194 @@ +/*************************************************************************/ +/* audio_driver_alsa.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* */ +/* 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 "globals.h" + +Error AudioDriverPulseAudio::init() { + + active = false; + thread_exited = false; + exit_thread = false; + pcm_open = false; + samples_in = NULL; + samples_out = NULL; + + mix_rate = 44100; + output_format = OUTPUT_STEREO; + channels = 2; + + pa_sample_spec spec; + spec.format = PA_SAMPLE_S16LE; + spec.channels = channels; + spec.rate = mix_rate; + + 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 + NULL, // use default buffering attributes + &error_code + ); + + if (pulse == NULL) { + + fprintf(stderr, "PulseAudio ERR: %s\n", pa_strerror(error_code));\ + ERR_FAIL_COND_V(pulse == NULL, ERR_CANT_OPEN); + } + + int latency = GLOBAL_DEF("audio/output_latency", 25); + buffer_size = nearest_power_of_2(latency * mix_rate / 1000); + + 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; +} + +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; +} + +AudioDriverSW::OutputFormat AudioDriverPulseAudio::get_output_format() const { + + return output_format; +} + +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; +} + +AudioDriverPulseAudio::~AudioDriverPulseAudio() { + +} + +#endif |