67 lines
2 KiB
C
67 lines
2 KiB
C
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#pragma once
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#include "stdafx.h"
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#include <algorithm>
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const uint32_t PPU_PALETTE_ARGB[] = {
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0xFF666666, 0xFF002A88, 0xFF1412A7, 0xFF3B00A4, 0xFF5C007E,
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0xFF6E0040, 0xFF6C0600, 0xFF561D00, 0xFF333500, 0xFF0B4800,
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0xFF005200, 0xFF004F08, 0xFF00404D, 0xFF000000, 0xFF000000,
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0xFF000000, 0xFFADADAD, 0xFF155FD9, 0xFF4240FF, 0xFF7527FE,
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0xFFA01ACC, 0xFFB71E7B, 0xFFB53120, 0xFF994E00, 0xFF6B6D00,
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0xFF388700, 0xFF0C9300, 0xFF008F32, 0xFF007C8D, 0xFF000000,
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0xFF000000, 0xFF000000, 0xFFFFFEFF, 0xFF64B0FF, 0xFF9290FF,
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0xFFC676FF, 0xFFF36AFF, 0xFFFE6ECC, 0xFFFE8170, 0xFFEA9E22,
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0xFFBCBE00, 0xFF88D800, 0xFF5CE430, 0xFF45E082, 0xFF48CDDE,
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0xFF4F4F4F, 0xFF000000, 0xFF000000, 0xFFFFFEFF, 0xFFC0DFFF,
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0xFFD3D2FF, 0xFFE8C8FF, 0xFFFBC2FF, 0xFFFEC4EA, 0xFFFECCC5,
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0xFFF7D8A5, 0xFFE4E594, 0xFFCFEF96, 0xFFBDF4AB, 0xFFB3F3CC,
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0xFFB5EBF2, 0xFFB8B8B8, 0xFF000000, 0xFF000000,
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};
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class VideoDecoder
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{
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private:
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static uint32_t ProcessIntensifyBits(uint16_t ppuPixel)
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{
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uint32_t pixelOutput = PPU_PALETTE_ARGB[ppuPixel & 0x3F];
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//Incorrect emphasis bit implementation, but will do for now.
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float redChannel = (float)((pixelOutput & 0xFF0000) >> 16);
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float greenChannel = (float)((pixelOutput & 0xFF00) >> 8);
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float blueChannel = (float)(pixelOutput & 0xFF);
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if(ppuPixel & 0x40) {
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//Intensify red
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redChannel *= 1.1f;
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greenChannel *= 0.9f;
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blueChannel *= 0.9f;
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}
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if(ppuPixel & 0x80) {
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//Intensify green
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greenChannel *= 1.1f;
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redChannel *= 0.9f;
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blueChannel *= 0.9f;
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}
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if(ppuPixel & 0x100) {
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//Intensify blue
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blueChannel *= 1.1f;
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redChannel *= 0.9f;
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greenChannel *= 0.9f;
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}
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uint8_t r, g, b;
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r = (uint8_t)fmin(redChannel, 255);
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g = (uint8_t)fmin(greenChannel, 255);
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b = (uint8_t)fmin(blueChannel, 255);
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return 0xFF000000 | (r << 16) | (g << 8) | b;
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}
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public:
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static void DecodeFrame(uint16_t* inputBuffer, uint32_t* outputBuffer)
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{
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for(uint32_t i = 0; i < 256*240; i++) {
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((uint32_t*)outputBuffer)[i] = ProcessIntensifyBits(inputBuffer[i]);
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}
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}
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};
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