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Simplify DMA logic.

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This commit is contained in:
Thomas Harte
2021-12-02 09:33:02 -05:00
parent 364059551c
commit 9554869886
1 changed files with 8 additions and 16 deletions
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24
Machines/Amiga/Audio.cpp
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@@ -29,24 +29,16 @@ Audio::Audio(Chipset &chipset, uint16_t *ram, size_t word_size, float output_rat
} }
bool Audio::advance_dma(int channel) { bool Audio::advance_dma(int channel) {
switch(channels_[channel].state) { if(channels_[channel].has_data) {
default: return false;
if(!channels_[channel].has_data) {
set_data(channel, ram_[pointer_[size_t(channel)]]);
++pointer_[size_t(channel)];
return true;
}
break;
case Channel::State::WaitingForDummyDMA:
if(!channels_[channel].has_data) {
channels_[channel].has_data = true;
return true;
}
break;
} }
return false; set_data(channel, ram_[pointer_[size_t(channel)]]);
if(channels_[channel].state != Channel::State::WaitingForDummyDMA) {
++pointer_[size_t(channel)];
}
return true;
} }
void Audio::set_length(int channel, uint16_t length) { void Audio::set_length(int channel, uint16_t length) {