Prepare SPU and IO Ports related code

2022-08-31 15:18:30 +02:00
parent bb37343ba7
commit ba095f2064
6 changed files with 171 additions and 1 deletions
--- a/include/PSX/SPU/SPU_Ports.hpp
+++ b/include/PSX/SPU/SPU_Ports.hpp
@@ -0,0 +1,83 @@
+#ifndef __JABYENGINE_SPU_PORTS_HPP__
+#define __JABYENGINE_SPU_PORTS_HPP__
+#include "../Auxiliary/io_class_helper.hpp"
+
+namespace SPU {
+    //SampleRate is defined as 4096 == 44100Hz
+    struct __no_align SampleRate {
+        uint16_t raw_value = 0;
+
+        static constexpr SampleRate from_HZ(long double freq)
+        {
+            constexpr long double Base = (4096.0 / 44100.0);
+
+            return static_cast<SampleRate>(((freq*4096.0)/44100.0));
+        }
+    };
+
+    struct __no_align SweepVolume {
+        enum Type {
+            Linear      = 0,
+            Exponential = 1,
+        };
+
+        enum Direction {
+            Increase = 0,
+            Decrease = 1,
+        };
+
+        enum Phase {
+            Positive = 0,
+            Negative = 1,
+        };
+
+        uint16_t raw_value = 0;
+
+        constexpr SweepVolume() = default;
+
+        constexpr void set_volume(int16_t volume) {
+            this->raw_value = bit::value::set_normalized(this->raw_value, bit::cast<uint16_t>(volume >> 1), __start_end_bit2_start_length(0, 14));
+        }
+
+        constexpr int16_t get_volume() const {
+            return bit::cast<int16_t>(bit::value::get_normalized(this->raw_value, __start_end_bit2_start_length(0, 14)));
+        }
+
+        io_class__2option_map(volume_mode, sweep_mode, 15);
+        io_class__2option_map_getter(Type,      linear_sweep_mode,    exponential_sweep_mode, sweep_mode_type,      14);
+        io_class__2option_map_getter(Direction, increase_sweep_mode,  decrease_sweep_mode,    sweep_mode_direction, 13);
+        io_class__2option_map_getter(Phase,     positive_sweep_phase, negative_sweep_phase,   sweep_phase,          12);
+
+        //Uses only 5bit of shift (0..1F (slow..fast))
+        constexpr void set_sweep_shift(uint8_5b shift) {
+            const uint16_t crop_value = static_cast<uint16_t>(shift); //(bit::value::crop_value(shift, 5));
+            this->raw_value = bit::value::set_normalized(this->raw_value, crop_value, __start_end_bit2_start_length(2, 6));
+        }
+
+        constexpr uint8_5b get_sweep_shift() const {
+            return bit::value::get_normalized(this->raw_value, __start_end_bit2_start_length(2, 6));
+        }
+        
+        //0..3 maps to => +7, +6, +5, +4 or -8, -7, -6, -5
+        constexpr void set_sweep_step(uint8_2b step) {
+            this->raw_value = bit::value::set_normalized(this->raw_value, static_cast<uint16_t>(step), __start_end_bit2_start_length(0, 1));
+        }
+
+        constexpr uint8_2b get_sweep_step() const {
+            return bit::value::get_normalized(this->raw_value, __start_end_bit2_start_length(0, 1));
+        }
+    };
+
+    struct __no_align Voice {
+        SweepVolume volumeLeft;
+        SweepVolume volumeRight;
+        /*VolatileValue<SampleRate> sampleRate;
+        VolatileValue<uint16_t>   adr;
+        VolatileValue<uint16_t>   ad; //0x...08: 15 - 0
+        VolatileValue<uint16_t>   sr; //0x...0A: 31 - 16
+        VolatileValue<uint16_t>   currentVolume; //Not used
+        VolatileValue<uint16_t>   repeatAdr;*/
+    };
+}
+
+#endif //!__JABYENGINE_SPU_PORTS_HPP__