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https://github.com/steve-m/hsdaoh-rp2350.git
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97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
#ifndef DATA_PACKET_H
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#define DATA_PACKET_H
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#include "pico.h"
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#define TMDS_CHANNELS 3
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#define N_LINE_PER_DATA 2
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#define W_GUARDBAND 2
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#define W_PREAMBLE 8
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#define W_DATA_PACKET 32
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#ifndef DVI_SYMBOLS_PER_WORD
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#define DVI_SYMBOLS_PER_WORD 2
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#endif
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#if DVI_SYMBOLS_PER_WORD != 1 && DVI_SYMBOLS_PER_WORD !=2
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#error "Unsupported value for DVI_SYMBOLS_PER_WORD"
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#endif
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#define W_DATA_ISLAND (W_GUARDBAND * 2 + W_DATA_PACKET)
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#define N_DATA_ISLAND_WORDS (W_DATA_ISLAND / DVI_SYMBOLS_PER_WORD)
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typedef enum {
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SCAN_INFO_NO_DATA,
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OVERSCAN,
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UNDERSCAN
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} scan_info;
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typedef enum {
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RGB,
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YCBCR422,
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YCBCR444
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} pixel_format;
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typedef enum {
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COLORIMETRY_NO_DATA,
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ITU601,
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ITU709,
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EXTENDED
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} colorimetry;
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typedef enum {
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PIC_ASPECT_RATIO_NO_DATA,
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PIC_ASPECT_RATIO_4_3,
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PIC_ASPECT_RATIO_16_9
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} picture_aspect_ratio;
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typedef enum {
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ACTIVE_FORMAT_ASPECT_RATIO_NO_DATA = -1,
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SAME_AS_PAR = 8,
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ACTIVE_FORMAT_ASPECT_RATIO_4_3,
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ACTIVE_FORMAT_ASPECT_RATIO_16_9,
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ACTIVE_FORMAT_ASPECT_RATIO_14_9
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} active_format_aspect_ratio;
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typedef enum {
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DEFAULT,
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LIMITED,
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FULL
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} RGB_quantization_range;
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typedef enum {
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_640x480P60 = 1,
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_720x480P60 = 2,
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_1280x720P60 = 4,
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_1920x1080I60 = 5,
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_1920x1080P60 = 16,
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} video_code;
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typedef struct data_packet {
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uint8_t header[4];
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uint8_t subpacket[4][8];
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} data_packet_t;
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typedef struct data_island_stream {
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uint32_t data[TMDS_CHANNELS][N_DATA_ISLAND_WORDS];
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} data_island_stream_t;
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// Functions related to the data_packet (requires a data_packet instance)
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void compute_header_parity(data_packet_t *data_packet);
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void compute_subpacket_parity(data_packet_t *data_packet, int i);
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void compute_parity(data_packet_t *data_packet);
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void compute_info_frame_checkSum(data_packet_t *data_packet);
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void encode_header(const data_packet_t *data_packet, uint32_t *dst, int hv, bool firstPacket);
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void encode_subpacket(const data_packet_t *data_packet, uint32_t *dst1, uint32_t *dst2);
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void set_null(data_packet_t *data_packet);
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void set_AVI_info_frame(data_packet_t *data_packet, scan_info s, pixel_format y, colorimetry c, picture_aspect_ratio m,
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active_format_aspect_ratio r, RGB_quantization_range q, video_code vic);
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// Public Functions
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extern uint32_t defaultDataPacket12_[N_DATA_ISLAND_WORDS];
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inline uint32_t *getDefaultDataPacket12() {
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return defaultDataPacket12_;
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}
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uint32_t *getDefaultDataPacket0(bool vsync, bool hsync);
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void encode_data_island(data_island_stream_t *dst, const data_packet_t *packet, bool vsync, bool hsync);
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#endif
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