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refactor(emulator): enhance input handling and audio resampling features

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- Renamed `turbo_mode()` to `is_turbo_mode()` for clarity in the Emulator class.
- Improved input handling in the Snes class by adding button state management and ensuring proper initialization of input controllers.
- Implemented multiple audio resampling methods (linear, cosine, cubic) in the Dsp class, allowing for enhanced audio quality during playback.
- Updated the user interface to include options for selecting audio interpolation methods and added keyboard shortcuts for emulator controls.

Benefits:
- Improved code readability and maintainability through clearer method naming and structured input management.
- Enhanced audio playback quality with new resampling techniques.
- Streamlined user experience with added UI features for audio settings and keyboard shortcuts.
This commit is contained in:
scawful
2025-10-11 13:56:49 -04:00
parent 0a4b17fdd0
commit 9ffb7803f5
11 changed files with 454 additions and 114 deletions
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32
src/app/emu/snes.cc
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@@ -18,12 +18,15 @@ namespace emu {
namespace {
void input_latch(Input* input, bool value) {
input->latch_line_ = value;
if (input->latch_line_) input->latched_state_ = input->current_state_;
if (input->latch_line_) {
input->latched_state_ = input->current_state_;
}
}
uint8_t input_read(Input* input) {
if (input->latch_line_) input->latched_state_ = input->current_state_;
uint8_t ret = input->latched_state_ & 1;
input->latched_state_ >>= 1;
input->latched_state_ |= 0x8000;
return ret;
@@ -56,6 +59,8 @@ void Snes::Reset(bool hard) {
ResetDma(&memory_);
input1.latch_line_ = false;
input2.latch_line_ = false;
input1.current_state_ = 0; // Clear current button states
input2.current_state_ = 0; // Clear current button states
input1.latched_state_ = 0;
input2.latched_state_ = 0;
if (hard) memset(ram, 0, sizeof(ram));
@@ -392,7 +397,8 @@ uint8_t Snes::Rread(uint32_t adr) {
return ReadBBus(adr & 0xff); // B-bus
}
if (adr == 0x4016) {
return input_read(&input1) | (memory_.open_bus() & 0xfc);
uint8_t result = input_read(&input1) | (memory_.open_bus() & 0xfc);
return result;
}
if (adr == 0x4017) {
return input_read(&input2) | (memory_.open_bus() & 0xe0) | 0x1c;
@@ -634,7 +640,27 @@ void Snes::SetSamples(int16_t* sample_data, int wanted_samples) {
void Snes::SetPixels(uint8_t* pixel_data) { ppu_.PutPixels(pixel_data); }
void Snes::SetButtonState(int player, int button, bool pressed) {}
void Snes::SetButtonState(int player, int button, bool pressed) {
// Select the appropriate input based on player number
Input* input = (player == 1) ? &input1 : &input2;
// SNES controller button mapping (standard layout)
// Bit 0: B, Bit 1: Y, Bit 2: Select, Bit 3: Start
// Bit 4: Up, Bit 5: Down, Bit 6: Left, Bit 7: Right
// Bit 8: A, Bit 9: X, Bit 10: L, Bit 11: R
if (button < 0 || button > 11) return; // Validate button range
uint16_t old_state = input->current_state_;
if (pressed) {
// Set the button bit
input->current_state_ |= (1 << button);
} else {
// Clear the button bit
input->current_state_ &= ~(1 << button);
}
}
void Snes::loadState(const std::string& path) {
std::ifstream file(path, std::ios::binary);