godot/platform/bb10/audio_driver_bb10.cpp
2015-04-18 14:38:54 -03:00

256 lines
7.4 KiB
C++

/*************************************************************************/
/* audio_driver_bb10.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 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_bb10.h"
#include <errno.h>
Error AudioDriverBB10::init() {
return init(NULL);
};
Error AudioDriverBB10::init(const char* p_name) {
active=false;
thread_exited=false;
exit_thread=false;
pcm_open = false;
samples_in = NULL;
samples_out = NULL;
mix_rate = 44100;
output_format = OUTPUT_STEREO;
char* dev_name;
if (p_name == NULL) {
dev_name = "pcmPreferred";
} else {
dev_name = (char *) p_name;
}
printf("******** reconnecting to device %s\n", dev_name);
int card, dev;
int ret = snd_pcm_open_name(&pcm_handle, dev_name, SND_PCM_OPEN_PLAYBACK);
ERR_FAIL_COND_V(ret < 0, FAILED);
pcm_open = true;
snd_pcm_channel_info_t cinfo;
zeromem(&cinfo, sizeof (cinfo));
cinfo.channel = SND_PCM_CHANNEL_PLAYBACK;
snd_pcm_plugin_info(pcm_handle, &cinfo);
printf("rates %i, %i, %i, %i, %i\n", cinfo.rates, cinfo.rates & SND_PCM_RATE_44100, cinfo.rates & SND_PCM_RATE_32000, cinfo.rates & SND_PCM_RATE_22050, cinfo.max_rate);
mix_rate = cinfo.max_rate;
printf("formats %i, %i, %i\n", cinfo.formats, cinfo.formats & SND_PCM_FMT_S16_BE, cinfo.formats & SND_PCM_FMT_S16_LE);
ERR_FAIL_COND_V(!(cinfo.formats & SND_PCM_FMT_S16_LE), FAILED);
printf("voices %i\n", cinfo.max_voices);
output_format = cinfo.max_voices >= 2 ? OUTPUT_STEREO : OUTPUT_MONO;
snd_pcm_channel_params_t cp;
zeromem(&cp, sizeof(cp));
cp.mode = SND_PCM_MODE_BLOCK;
cp.channel = SND_PCM_CHANNEL_PLAYBACK;
cp.start_mode = SND_PCM_START_DATA;
cp.stop_mode = SND_PCM_STOP_STOP;
//cp.buf.block.frag_size = cinfo.max_fragment_size;
cp.buf.block.frag_size = 512;
cp.buf.block.frags_max = 1;
cp.buf.block.frags_min = 1;
cp.format.interleave = 1;
cp.format.rate = mix_rate;
cp.format.voices = output_format == OUTPUT_MONO ? 1 : 2;
cp.format.format = SND_PCM_SFMT_S16_LE;
ret = snd_pcm_plugin_params(pcm_handle, &cp);
printf("ret is %i, %i\n", ret, cp.why_failed);
ERR_FAIL_COND_V(ret < 0, FAILED);
ret = snd_pcm_plugin_prepare(pcm_handle, SND_PCM_CHANNEL_PLAYBACK);
ERR_FAIL_COND_V(ret < 0, FAILED);
snd_mixer_group_t group;
zeromem(&group, sizeof(group));
snd_pcm_channel_setup_t setup;
zeromem(&setup, sizeof(setup));
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
setup.mode = SND_PCM_MODE_BLOCK;
setup.mixer_gid = &group.gid;
ret = snd_pcm_plugin_setup(pcm_handle, &setup);
ERR_FAIL_COND_V(ret < 0, FAILED);
pcm_frag_size = setup.buf.block.frag_size;
pcm_max_frags = 1;
sample_buf_count = pcm_frag_size * pcm_max_frags / 2;
printf("sample count %i, %i, %i\n", sample_buf_count, pcm_frag_size, pcm_max_frags);
samples_in = memnew_arr(int32_t, sample_buf_count);
samples_out = memnew_arr(int16_t, sample_buf_count);
thread = Thread::create(AudioDriverBB10::thread_func, this);
return OK;
};
void AudioDriverBB10::thread_func(void* p_udata) {
AudioDriverBB10* ad = (AudioDriverBB10*)p_udata;
int channels = (ad->output_format == OUTPUT_MONO ? 1 : 2);
int frame_count = ad->sample_buf_count / channels;
int bytes_out = frame_count * channels * 2;
while (!ad->exit_thread) {
if (!ad->active) {
for (int i=0; i < ad->sample_buf_count; i++) {
ad->samples_out[i] = 0;
};
} else {
ad->lock();
ad->audio_server_process(frame_count, ad->samples_in);
ad->unlock();
for(int i=0;i<frame_count*channels;i++) {
ad->samples_out[i]=ad->samples_in[i]>>16;
}
};
int todo = bytes_out;
int total = 0;
while (todo) {
uint8_t* src = (uint8_t*)ad->samples_out;
int wrote = snd_pcm_plugin_write(ad->pcm_handle, (void*)(src + total), todo);
if (wrote < 0) {
// error?
break;
};
total += wrote;
todo -= wrote;
if (wrote < todo) {
if (ad->thread_exited) {
break;
};
printf("pcm_write underrun %i, errno %i\n", (int)ad->thread_exited, errno);
snd_pcm_channel_status_t status;
zeromem(&status, sizeof(status));
// put in non-blocking mode
snd_pcm_nonblock_mode(ad->pcm_handle, 1);
status.channel = SND_PCM_CHANNEL_PLAYBACK;
int ret = snd_pcm_plugin_status(ad->pcm_handle, &status);
//printf("status return %i, %i, %i, %i, %i\n", ret, errno, status.status, SND_PCM_STATUS_READY, SND_PCM_STATUS_UNDERRUN);
snd_pcm_nonblock_mode(ad->pcm_handle, 0);
if (ret < 0) {
break;
};
if (status.status == SND_PCM_STATUS_READY ||
status.status == SND_PCM_STATUS_UNDERRUN) {
snd_pcm_plugin_prepare(ad->pcm_handle, SND_PCM_CHANNEL_PLAYBACK);
} else {
break;
};
};
};
};
snd_pcm_plugin_flush (ad->pcm_handle, SND_PCM_CHANNEL_PLAYBACK);
ad->thread_exited=true;
printf("**************** audio thread exit\n");
};
void AudioDriverBB10::start() {
active = true;
};
int AudioDriverBB10::get_mix_rate() const {
return mix_rate;
};
AudioDriverSW::OutputFormat AudioDriverBB10::get_output_format() const {
return output_format;
};
void AudioDriverBB10::lock() {
if (!thread)
return;
mutex->lock();
};
void AudioDriverBB10::unlock() {
if (!thread)
return;
mutex->unlock();
};
void AudioDriverBB10::finish() {
if (!thread)
return;
exit_thread = true;
Thread::wait_to_finish(thread);
if (pcm_open)
snd_pcm_close(pcm_handle);
if (samples_in) {
memdelete_arr(samples_in);
memdelete_arr(samples_out);
};
memdelete(thread);
thread = NULL;
};
AudioDriverBB10::AudioDriverBB10() {
mutex = Mutex::create();
};
AudioDriverBB10::~AudioDriverBB10() {
memdelete(mutex);
mutex = NULL;
};