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annotate vgm.h @ 2452:8b3daed1c076

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Allow more if statements to be constant folded in CPU DSL
author Michael Pavone <pavone@retrodev.com>
date Mon, 19 Feb 2024 18:14:12 -0800
parents 92449b47cce8
children fb8f49b0aece
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1 #ifndef VGM_H_
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2 #define VGM_H_
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3
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4 #include <stdint.h>
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5 #include <stdio.h>
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6
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7 #pragma pack(push, 1)
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8 typedef struct {
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9 char ident[4];
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10 uint32_t eof_offset;
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11 uint32_t version;
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12 uint32_t sn76489_clk;
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13 uint32_t ym2413_clk;
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14 uint32_t gd3_offset;
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15 uint32_t num_samples;
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16 uint32_t loop_offset;
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17 uint32_t loop_samples;
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18 uint32_t rate;
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19 uint16_t sn76489_fb;
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20 uint8_t sn76489_shift;
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21 uint8_t sn76489_flags;
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22 uint32_t ym2612_clk;
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23 uint32_t ym2151_clk;
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24 uint32_t data_offset;
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25 uint32_t sega_pcm_clk;
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26 uint32_t sega_pcm_reg;
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27 } vgm_header;
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28
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29 typedef struct {
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30 uint32_t rf5c68_clk;
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31 uint32_t ym2203_clk;
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32 uint32_t ym2608_clk;
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33 uint32_t ym2610_clk;
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34 uint32_t ym3812_clk;
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35 uint32_t ym3526_clk;
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36 uint32_t y8950_clk;
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37 uint32_t ymf262_clk;
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38 uint32_t ymf278b_clk;
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39 uint32_t ymf271_clk;
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40 uint32_t ymz280b_clk;
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41 uint32_t rf5c164_clk;
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42 uint32_t pwm_clk;
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43 uint32_t ay8910_clk;
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44 uint8_t ay8910_type;
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45 uint8_t ay8910_flags;
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46 uint8_t ym2203_ay_flags;
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47 uint8_t ym2608_ay_flags;
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48 //TODO: additional header extension fields
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49 } vgm_extended_header;
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50
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51 enum {
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52 CMD_PSG_STEREO = 0x4F,
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53 CMD_PSG,
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54 CMD_YM2413,
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55 CMD_YM2612_0,
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56 CMD_YM2612_1,
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57 CMD_YM2151,
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58 CMD_YM2203,
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59 CMD_YM2608_0,
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60 CMD_YM2608_1,
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61 CMD_YM2610_0,
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62 CMD_YM2610_1,
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63 CMD_YM3812,
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64 CMD_YM3526,
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65 CMD_Y8950,
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66 CMD_YMZ280B,
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67 CMD_YMF262_0,
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68 CMD_YMF262_1,
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69 CMD_WAIT = 0x61,
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70 CMD_WAIT_60,
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71 CMD_WAIT_50,
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72 CMD_END = 0x66,
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73 CMD_DATA,
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74 CMD_PCM_WRITE,
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75 CMD_WAIT_SHORT = 0x70,
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76 CMD_YM2612_DAC = 0x80,
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77 CMD_DAC_STREAM_SETUP = 0x90,
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78 CMD_DAC_STREAM_DATA,
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79 CMD_DAC_STREAM_FREQ,
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80 CMD_DAC_STREAM_START,
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81 CMD_DAC_STREAM_STOP,
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82 CMD_DAC_STREAM_STARTFAST,
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83 CMD_PCM68_REG = 0xB0,
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84 CMD_PCM164_REG,
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85 CMD_PCM68_RAM = 0xC1,
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86 CMD_PCM164_RAM = 0xC2,
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87 CMD_DATA_SEEK = 0xE0
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88 };
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89
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90 enum {
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91 DATA_YM2612_PCM = 0,
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92 DATA_RF5C68,
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93 DATA_RF5C164,
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94 };
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95
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96 #pragma pack(pop)
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97
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98 typedef struct data_block data_block;
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99 struct data_block {
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100 data_block *next;
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101 uint8_t *data;
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102 uint32_t size;
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103 uint8_t type;
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104 };
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105
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106 typedef struct {
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107 vgm_header header;
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108 FILE *f;
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109 uint32_t master_clock;
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110 uint32_t last_cycle;
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111 uint32_t extra_delta;
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112 } vgm_writer;
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113
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114 vgm_writer *vgm_write_open(char *filename, uint32_t rate, uint32_t clock, uint32_t cycle);
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115 void vgm_sn76489_init(vgm_writer *writer, uint32_t clock, uint16_t feedback, uint8_t shift_reg_size, uint8_t flags);
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116 void vgm_sn76489_write(vgm_writer *writer, uint32_t cycle, uint8_t value);
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117 void vgm_ym2612_init(vgm_writer *writer, uint32_t clock);
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118 void vgm_ym2612_part1_write(vgm_writer *writer, uint32_t cycle, uint8_t reg, uint8_t value);
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119 void vgm_ym2612_part2_write(vgm_writer *writer, uint32_t cycle, uint8_t reg, uint8_t value);
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120 void vgm_adjust_cycles(vgm_writer *writer, uint32_t deduction);
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121 void vgm_close(vgm_writer *writer);
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122
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123 #endif //VGM_H_