mirror of
https://github.com/TomHarte/CLK.git
synced 2024-09-28 09:54:49 +00:00
Capture more audio detail.
This commit is contained in:
parent
389541be6d
commit
a6ec870872
@ -34,44 +34,71 @@ struct Sound {
|
|||||||
current_.start = next_.start;
|
current_.start = next_.start;
|
||||||
std::swap(current_.end, next_.end);
|
std::swap(current_.end, next_.end);
|
||||||
set_buffer_valid(false);
|
set_buffer_valid(false);
|
||||||
halted_ = false;
|
set_halted(false);
|
||||||
}
|
}
|
||||||
|
|
||||||
void set_frequency(uint8_t frequency) {
|
void set_frequency(uint8_t frequency) {
|
||||||
divider_ = reload_ = frequency;
|
divider_ = reload_ = frequency;
|
||||||
}
|
}
|
||||||
|
|
||||||
void set_stereo_image([[maybe_unused]] uint8_t channel, [[maybe_unused]] uint8_t value) {
|
void set_stereo_image(uint8_t channel, uint8_t value) {
|
||||||
// TODO.
|
if(!value) {
|
||||||
|
positions_[channel].left =
|
||||||
|
positions_[channel].right = 0;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
positions_[channel].right = value - 1;
|
||||||
|
positions_[channel].left = 6 - positions_[channel].right;
|
||||||
}
|
}
|
||||||
|
|
||||||
void tick() {
|
void tick() {
|
||||||
|
// Do nothing if not currently outputting.
|
||||||
if(halted_) {
|
if(halted_) {
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Apply user-programmed clock divider.
|
||||||
--divider_;
|
--divider_;
|
||||||
if(divider_) return;
|
if(divider_) return;
|
||||||
divider_ = reload_;
|
divider_ = reload_;
|
||||||
|
|
||||||
|
// Grab a single byte from the FIFO.
|
||||||
|
// TODO: and convert to a linear value, apply stereo image, output.
|
||||||
|
++byte_;
|
||||||
|
|
||||||
|
// If the FIFO is exhausted, consider triggering a DMA request.
|
||||||
|
if(byte_ == 16) {
|
||||||
|
byte_ = 0;
|
||||||
|
|
||||||
current_.start += 16;
|
current_.start += 16;
|
||||||
if(current_.start == current_.end) {
|
if(current_.start == current_.end) {
|
||||||
if(next_buffer_valid_) {
|
if(next_buffer_valid_) {
|
||||||
swap();
|
swap();
|
||||||
} else {
|
} else {
|
||||||
halted_ = true;
|
set_halted(true);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
private:
|
private:
|
||||||
uint8_t divider_ = 0, reload_ = 0;
|
uint8_t divider_ = 0, reload_ = 0;
|
||||||
|
int byte_ = 0;
|
||||||
|
|
||||||
void set_buffer_valid(bool valid) {
|
void set_buffer_valid(bool valid) {
|
||||||
next_buffer_valid_ = valid;
|
next_buffer_valid_ = valid;
|
||||||
observer_.update_sound_interrupt();
|
observer_.update_sound_interrupt();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void set_halted(bool halted) {
|
||||||
|
if(halted_ != halted && !halted) {
|
||||||
|
byte_ = 0;
|
||||||
|
divider_ = reload_;
|
||||||
|
}
|
||||||
|
halted_ = halted;
|
||||||
|
}
|
||||||
|
|
||||||
bool next_buffer_valid_ = false;
|
bool next_buffer_valid_ = false;
|
||||||
bool halted_ = true; // This is a bit of a guess.
|
bool halted_ = true; // This is a bit of a guess.
|
||||||
|
|
||||||
@ -80,6 +107,11 @@ private:
|
|||||||
};
|
};
|
||||||
Buffer current_, next_;
|
Buffer current_, next_;
|
||||||
|
|
||||||
|
struct StereoPosition {
|
||||||
|
// These are maintained as sixths, i.e. a value of 6 means 100%.
|
||||||
|
int left, right;
|
||||||
|
} positions_[8];
|
||||||
|
|
||||||
InterruptObserverT &observer_;
|
InterruptObserverT &observer_;
|
||||||
};
|
};
|
||||||
|
|
||||||
|
Loading…
Reference in New Issue
Block a user