#ifndef PROTOCOL_H

#define PROTOCOL_H

#include <stdint.h>

// RENDER

#define DRAW_WIDTH 240

#define DRAW_HEIGHT 160

#define PALETTE_COLORS 256

#define TOTAL_SCREEN_PIXELS (DRAW_WIDTH * DRAW_HEIGHT)

// TRANSFER

#define PACKET_SIZE 4

#define COLOR_SIZE 2

#define PIXEL_SIZE 1

#define AUDIO_CHUNK_SIZE 264 // (sizeof(gsm_frame) * 8)

#define AUDIO_CHUNK_PADDING 0 // (so every chunk it's exactly 66 packets)

#define AUDIO_SIZE_PACKETS 66 // -----------------------------^^

#define SPI_MODE 3

#define TRANSFER_SYNC_PERIOD 32

#define COLORS_PER_PACKET (PACKET_SIZE / COLOR_SIZE)

#define PIXELS_PER_PACKET (PACKET_SIZE / PIXEL_SIZE)

#define MAX_PIXELS_SIZE (TOTAL_SCREEN_PIXELS / PIXELS_PER_PACKET)

#define AUDIO_PADDED_SIZE (AUDIO_CHUNK_SIZE AUDIO_CHUNK_PADDING)

// DIFFS

#define TEMPORAL_DIFF_MAX_SIZE(TOTAL_PIXELS) (TOTAL_PIXELS / 8)

#define TEMPORAL_DIFF_MAX_PADDED_SIZE(TOTAL_PIXELS) \

(TEMPORAL_DIFF_MAX_SIZE(TOTAL_PIXELS) 4)

#define TEMPORAL_DIFF_MAX_PACKETS(TOTAL_PIXELS) \

(TEMPORAL_DIFF_MAX_SIZE(TOTAL_PIXELS) / PACKET_SIZE)

#define MAX_RLE 255

// FILES

#define CONFIG_FILENAME "config.cfg"

#define CONTROLS_FILENAME "controls.cfg"

#define PALETTE_CACHE_FILENAME "palette.cache"

// COMMANDS

#define CMD_RESET 0x99887000

#define CMD_RPI_OFFSET 1

#define CMD_GBA_OFFSET 2

#define CMD_FRAME_START 0x12345610

#define CMD_AUDIO 0x12345620

#define CMD_PIXELS 0x12345630

#define CMD_FRAME_END 0x12345640

#define CMD_RECOVERY 0x98765490

// RESET PACKET

#define RESET_PACKET_MASK 0b11111111111111111111000000000000

#define RENDER_MODE_BIT_MASK 0b1111

#define CONTROLS_BIT_MASK 0b1111

#define COMPRESSION_BIT_MASK 0b111

#define CPU_OVERCLOCK_BIT_MASK 0b1

#define CONTROLS_BIT_OFFSET 4

#define COMPRESSION_BIT_OFFSET 8

#define CPU_OVERCLOCK_BIT_OFFSET 11

#define IS_RESET(VALUE) (((VALUE)&RESET_PACKET_MASK) == CMD_RESET)

// METADATA PACKET

#define AUDIO_BIT_MASK 0b10000000000000000000000000000000

#define COMPR_BIT_MASK 0b01000000000000000000000000000000

#define PACKS_BIT_MASK 0b00000000000000000011111111111111

#define START_BIT_MASK 0b00000000000000001111111111111111

#define PACKS_BIT_OFFSET 16

// RENDER MODES

#define RENDER_MODES 9

#define RENDER_MODE_BENCHMARK_1 9

#define RENDER_MODE_BENCHMARK_2 10

#define RENDER_MODE_IS_BENCHMARK(MODE) \

(MODE == RENDER_MODE_BENCHMARK_1 || MODE == RENDER_MODE_BENCHMARK_2)

#define DEFAULT_RENDER_MODE 4

#define COMPRESSION_LEVELS 6

#ifdef WITH_AUDIO

#define RENDER_MODE_IS_INVALID(MODE) \

((MODE) == 1 || (MODE) == 2 || (MODE) == 3 || (MODE) == 5 || (MODE) == 6)

#endif

#ifndef WITH_AUDIO

#define RENDER_MODE_IS_INVALID(MODE) (false)

#endif

const uint32_t RENDER_MODE_WIDTH[RENDER_MODES] = {60, 60, 60, 120, 120,

120, 240, 240, 240};

const uint32_t RENDER_MODE_HEIGHT[RENDER_MODES] = {40, 80, 160, 40, 80,

160, 40, 80, 160};

const uint32_t RENDER_MODE_SCALEX[RENDER_MODES] = {4, 4, 4, 2, 2, 2, 1, 1, 1};

const uint32_t RENDER_MODE_SCALEY[RENDER_MODES] = {4, 2, 1, 4, 2, 1, 4, 2, 1};

const uint32_t RENDER_MODE_PIXELS[RENDER_MODES] = {

2400, 4800, 9600, 4800, 9600, 19200, 9600, 19200, 38400};

const uint32_t DIFF_THRESHOLDS[COMPRESSION_LEVELS] = {0, 500, 1000,

1500, 3000, 6000};

#endif // PROTOCOL_H