void Player_AD::limitHWChannels(int newCount) {
for (int i = newCount; i < ARRAYSIZE(_hwChannels); ++i) {
if (_hwChannels[i].allocated) {
freeHWChannel(i);
}
}
_numHWChannels = newCount;
}
void Player_AD::freeVoiceChannel(uint channel) {
VoiceChannel &vChannel = _voiceChannels[channel];
assert(vChannel.lastEvent);
freeHWChannel(channel);
vChannel.lastEvent = 0;
vChannel.b0Reg = 0;
vChannel.frequency = 0;
}
void Player_AD::startSound(int sound) {
Common::StackLock lock(_mutex);
// Setup the sound volume
setupVolume();
// Query the sound resource
const byte *res = _vm->getResourceAddress(rtSound, sound);
assert(res);
if (res[2] == 0x80) {
// Stop the current sounds
stopMusic();
// Lock the new music resource
_musicResource = sound;
_vm->_res->lock(rtSound, _musicResource);
// Start the new music resource
_musicData = res;
startMusic();
} else {
const byte priority = res[0];
// The original specified the channel to use in the sound
// resource. However, since we play as much as possible we sill
// ignore it and simply use the priority value to determine
// whether the sfx can be played or not.
//const byte channel = res[1];
// Try to allocate a sfx slot for playback.
SfxSlot *sfx = allocateSfxSlot(priority);
if (!sfx) {
::debugC(3, DEBUG_SOUND, "AdLib: No free sfx slot for sound %d", sound);
return;
}
// Try to start sfx playback
sfx->resource = sound;
sfx->priority = priority;
if (startSfx(sfx, res)) {
// Lock the new resource
_vm->_res->lock(rtSound, sound);
} else {
// When starting the sfx failed we need to reset the slot.
sfx->resource = -1;
for (int i = 0; i < ARRAYSIZE(sfx->channels); ++i) {
sfx->channels[i].state = kChannelStateOff;
if (sfx->channels[i].hardwareChannel != -1) {
freeHWChannel(sfx->channels[i].hardwareChannel);
sfx->channels[i].hardwareChannel = -1;
}
}
}
}
}
void Player_AD::stopSfx(SfxSlot *sfx) {
if (sfx->resource == -1) {
return;
}
// 1. step: Clear all the channels.
for (int i = 0; i < ARRAYSIZE(sfx->channels); ++i) {
if (sfx->channels[i].state) {
clearChannel(sfx->channels[i]);
sfx->channels[i].state = kChannelStateOff;
}
if (sfx->channels[i].hardwareChannel != -1) {
freeHWChannel(sfx->channels[i].hardwareChannel);
sfx->channels[i].hardwareChannel = -1;
}
}
// 2. step: Unlock the resource.
_vm->_res->unlock(rtSound, sfx->resource);
sfx->resource = -1;
}
