diff options
Diffstat (limited to 'backends/platform/wii/osystem_sfx.cpp')
-rw-r--r-- | backends/platform/wii/osystem_sfx.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/backends/platform/wii/osystem_sfx.cpp b/backends/platform/wii/osystem_sfx.cpp new file mode 100644 index 0000000000..16b2f3b055 --- /dev/null +++ b/backends/platform/wii/osystem_sfx.cpp @@ -0,0 +1,133 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <malloc.h> + +#include "osystem.h" + +#define SFX_THREAD_STACKSIZE (1024 * 128) +#define SFX_THREAD_PRIO 80 +#define SFX_THREAD_FRAG_SIZE 4096 + +static lwpq_t sfx_queue; +static lwp_t sfx_thread; +static u8 *sfx_stack; +static bool sfx_thread_running = false; +static bool sfx_thread_quit = false; + +static u8 sb = 0; +static u8 *sound_buffer[2]; + +static OSystem_Wii::SoundProc sound_proc = NULL; +static void *proc_param = NULL; + +static void audio_switch_buffers() { + AUDIO_StopDMA(); + AUDIO_InitDMA((u32) sound_buffer[sb], SFX_THREAD_FRAG_SIZE); + AUDIO_StartDMA(); + + LWP_ThreadSignal(sfx_queue); +} + +static void * sfx_thread_func(void *arg) { + u8 next_sb; + + while (true) { + LWP_ThreadSleep(sfx_queue); + + if (sfx_thread_quit) + break; + + next_sb = sb ^ 1; + sound_proc(proc_param, sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE); + DCFlushRange(sound_buffer[next_sb], SFX_THREAD_FRAG_SIZE); + + sb = next_sb; + } + + return NULL; +} + +void OSystem_Wii::initSfx() { + sfx_thread_running = false; + sfx_thread_quit = false; + + sfx_stack = (u8 *) memalign(32, SFX_THREAD_STACKSIZE); + memset(sfx_stack, 0, SFX_THREAD_STACKSIZE); + + LWP_InitQueue(&sfx_queue); + + s32 res = LWP_CreateThread(&sfx_thread, sfx_thread_func, NULL, sfx_stack, + SFX_THREAD_STACKSIZE, SFX_THREAD_PRIO); + + if (res) { + printf("ERROR creating sfx thread: %d\n", res); + LWP_CloseQueue(sfx_queue); + return; + } + + sfx_thread_running = true; + + sound_buffer[0] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE); + sound_buffer[1] = (u8 *) memalign(32, SFX_THREAD_FRAG_SIZE); + + memset(sound_buffer[0], 0, SFX_THREAD_FRAG_SIZE); + memset(sound_buffer[1], 0, SFX_THREAD_FRAG_SIZE); + + DCFlushRange(sound_buffer[0], SFX_THREAD_FRAG_SIZE); + DCFlushRange(sound_buffer[1], SFX_THREAD_FRAG_SIZE); + + sound_proc = Audio::Mixer::mixCallback; + proc_param = _mixer; + + _mixer->setReady(true); + + AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ); + AUDIO_RegisterDMACallback(audio_switch_buffers); + + audio_switch_buffers(); +} + +void OSystem_Wii::deinitSfx() { + if (_mixer) + _mixer->setReady(false); + + AUDIO_StopDMA(); + AUDIO_RegisterDMACallback(NULL); + + if (sfx_thread_running) { + sfx_thread_quit = true; + LWP_ThreadBroadcast(sfx_queue); + + LWP_JoinThread(sfx_thread, NULL); + LWP_CloseQueue(sfx_queue); + + sfx_thread_running = false; + + free(sound_buffer[0]); + free(sound_buffer[1]); + } +} + +int OSystem_Wii::getOutputSampleRate() const { + return 48000; +} + |