mirror of
https://github.com/libretro/scummvm.git
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126 lines
3.1 KiB
C++
126 lines
3.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <malloc.h>
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#include "osystem.h"
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#define SFX_THREAD_STACKSIZE (1024 * 128)
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#define SFX_THREAD_PRIO 80
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#define SFX_THREAD_FRAG_SIZE 4096
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static lwpq_t sfx_queue;
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static lwp_t sfx_thread;
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static u8 *sfx_stack;
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static bool sfx_thread_running = false;
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static bool sfx_thread_quit = false;
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static u8 sb = 0;
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static u8 *sound_buffer[2];
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static void audio_switch_buffers() {
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AUDIO_StopDMA();
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AUDIO_InitDMA((u32) sound_buffer[sb], SFX_THREAD_FRAG_SIZE);
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AUDIO_StartDMA();
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LWP_ThreadSignal(sfx_queue);
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}
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static void * sfx_thread_func(void *arg) {
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Audio::MixerImpl *mixer = (Audio::MixerImpl *) arg;
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u8 next_sb;
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while (true) {
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LWP_ThreadSleep(sfx_queue);
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if (sfx_thread_quit)
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break;
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next_sb = sb ^ 1;
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mixer->mixCallback(sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE);
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DCFlushRange(sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE);
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sb = next_sb;
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}
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return NULL;
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}
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void OSystem_Wii::initSfx() {
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sfx_thread_running = false;
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sfx_thread_quit = false;
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sfx_stack = (u8 *) memalign(32, SFX_THREAD_STACKSIZE);
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memset(sfx_stack, 0, SFX_THREAD_STACKSIZE);
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LWP_InitQueue(&sfx_queue);
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s32 res = LWP_CreateThread(&sfx_thread, sfx_thread_func, _mixer, sfx_stack,
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SFX_THREAD_STACKSIZE, SFX_THREAD_PRIO);
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if (res) {
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printf("ERROR creating sfx thread: %d\n", res);
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LWP_CloseQueue(sfx_queue);
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return;
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}
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sfx_thread_running = true;
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sound_buffer[0] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE);
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sound_buffer[1] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE);
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memset(sound_buffer[0], 0, SFX_THREAD_FRAG_SIZE);
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memset(sound_buffer[1], 0, SFX_THREAD_FRAG_SIZE);
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DCFlushRange(sound_buffer[0], SFX_THREAD_FRAG_SIZE);
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DCFlushRange(sound_buffer[1], SFX_THREAD_FRAG_SIZE);
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_mixer->setOutputRate(48000);
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_mixer->setReady(true);
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AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);
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AUDIO_RegisterDMACallback(audio_switch_buffers);
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audio_switch_buffers();
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}
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void OSystem_Wii::deinitSfx() {
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if (_mixer)
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_mixer->setReady(false);
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AUDIO_StopDMA();
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AUDIO_RegisterDMACallback(NULL);
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if (sfx_thread_running) {
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sfx_thread_quit = true;
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LWP_ThreadBroadcast(sfx_queue);
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LWP_JoinThread(sfx_thread, NULL);
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LWP_CloseQueue(sfx_queue);
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sfx_thread_running = false;
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free(sound_buffer[0]);
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free(sound_buffer[1]);
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}
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}
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