mirror of
https://github.com/libretro/scummvm.git
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121 lines
3.0 KiB
C++
121 lines
3.0 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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* $URL$
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* $Id$
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*
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*/
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#include "osys_n64.h"
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void checkTimers(void) {
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OSystem_N64 *osys = (OSystem_N64 *)g_system;
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uint32 curTime = osys->getMillis();
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// Timer checking & firing
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if (osys->_timerCallback && (curTime >= osys->_timerCallbackNext)) {
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osys->_timerCallback(osys->_timerCallbackTimer);
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osys->_timerCallbackNext = curTime + osys->_timerCallbackTimer;
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}
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}
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void disableAudioPlayback(void) {
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if (!_audioEnabled) return;
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_audioEnabled = false;
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while (AI_busy()); // Wait for audio to stop
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}
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void enableAudioPlayback(void) {
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static bool _firstRun = true;
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OSystem_N64 *osys = (OSystem_N64 *)g_system;
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Audio::MixerImpl *localmixer = (Audio::MixerImpl *)osys->getMixer();
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uint32 sampleBufferSize = 3072;
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initAudioInterface(osys->_viClockRate, DEFAULT_SOUND_SAMPLE_RATE, 16, sampleBufferSize);
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osys->_audioBufferSize = getAIBufferSize();
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if (_firstRun) {
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localmixer->setReady(true);
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_firstRun = false;
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}
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disable_interrupts();
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_audioEnabled = true;
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sndCallback();
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sndCallback();
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registerAIhandler(sndCallback); // Lib checks if i try to register it multiple times
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enable_interrupts();
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}
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static volatile Uint32 _requiredSoundSlots = 0;
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void vblCallback(void) {
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// Switch display buffer
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switchDisplayBuffer();
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// If audio buffer got depleted, ask for more slots to refill.
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if (_audioEnabled && !AI_busy() && !_requiredSoundSlots) {
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sndCallback();
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sndCallback();
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}
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((OSystem_N64 *)g_system)->readControllerAnalogInput();
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}
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void sndCallback() {
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// Signal that an audio buffer finished playing and that we need more samples
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if (_requiredSoundSlots < 2)
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_requiredSoundSlots++;
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}
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void refillAudioBuffers(void) {
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if (!_audioEnabled) return;
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OSystem_N64 *osys = (OSystem_N64 *)g_system;
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byte *sndBuf;
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Audio::MixerImpl *localmixer = (Audio::MixerImpl *)osys->getMixer();
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while (_requiredSoundSlots) {
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sndBuf = (byte*)getAIBuffer();
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localmixer->mixCallback((byte*)sndBuf, osys->_audioBufferSize);
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putAIBuffer();
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_requiredSoundSlots--;
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}
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}
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int timer_handler(int t) {
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DefaultTimerManager *tm = (DefaultTimerManager *)g_system->getTimerManager();
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tm->handler();
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return t;
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}
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