diff options
Diffstat (limited to 'drivers/ao/audio_driver_ao.cpp')
| -rw-r--r-- | drivers/ao/audio_driver_ao.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/ao/audio_driver_ao.cpp b/drivers/ao/audio_driver_ao.cpp new file mode 100644 index 0000000000..a484a5882e --- /dev/null +++ b/drivers/ao/audio_driver_ao.cpp @@ -0,0 +1,161 @@ +/*************************************************************************/ +/* audio_driver_ao.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014 Anton Yabchinskiy. */ +/* */ +/* 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_ao.h" + +#ifdef AO_ENABLED + +#include "globals.h" +#include "os/os.h" + +#include <cstring> + +Error AudioDriverAO::init() { + + active = false; + thread_exited = false; + exit_thread = false; + pcm_open = false; + samples_in = NULL; + + mix_rate = 44100; + output_format = OUTPUT_STEREO; + channels = 2; + + ao_sample_format format; + + format.bits = 16; + format.rate = mix_rate; + format.channels = channels; + format.byte_format = AO_FMT_LITTLE; + format.matrix = "L,R"; + + device = ao_open_live(ao_default_driver_id(), &format, NULL); + ERR_FAIL_COND_V(device == 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); + + mutex = Mutex::create(); + thread = Thread::create(AudioDriverAO::thread_func, this); + + return OK; +}; + +void AudioDriverAO::thread_func(void* p_udata) { + AudioDriverAO* ad = (AudioDriverAO*)p_udata; + + // Overwrite samples on conversion + int16_t* samples_out = reinterpret_cast<int16_t*>(ad->samples_in); + unsigned int n_samples = ad->buffer_size * ad->channels; + unsigned int n_bytes = n_samples * sizeof(int16_t); + + while (!ad->exit_thread) { + if (ad->active) { + ad->lock(); + ad->audio_server_process(ad->buffer_size, ad->samples_in); + ad->unlock(); + + for (unsigned int i = 0; i < n_samples; i++) { + samples_out[i] = ad->samples_in[i] >> 16; + } + } else { + memset(samples_out, 0, n_bytes); + } + + if (ad->exit_thread) + break; + + if (!ao_play(ad->device, reinterpret_cast<char*>(samples_out), n_bytes)) { + ERR_PRINT("ao_play() failed"); + } + }; + + ad->thread_exited = true; +}; + +void AudioDriverAO::start() { + active = true; +}; + +int AudioDriverAO::get_mix_rate() const { + return mix_rate; +}; + +AudioDriverSW::OutputFormat AudioDriverAO::get_output_format() const { + return output_format; +}; + +void AudioDriverAO::lock() { + if (!thread || !mutex) + return; + mutex->lock(); +}; + +void AudioDriverAO::unlock() { + if (!thread || !mutex) + return; + mutex->unlock(); +}; + +void AudioDriverAO::finish() { + if (!thread) + return; + + exit_thread = true; + Thread::wait_to_finish(thread); + + if (samples_in) { + memdelete_arr(samples_in); + }; + + memdelete(thread); + if (mutex) + memdelete(mutex); + + if (device) + ao_close(device); + + thread = NULL; +}; + +AudioDriverAO::AudioDriverAO() { + mutex = NULL; + thread = NULL; + + ao_initialize(); +}; + +AudioDriverAO::~AudioDriverAO() { + ao_shutdown(); +}; + +#endif |