Mercurial > repos > blastem
annotate vgmplay.c @ 810:1f75614d7be8
Fixed an ommission in the CHANGELOG added basic description of extra utilities to README
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 26 Jul 2015 19:45:44 -0700 |
parents | 3eced113081c |
children | 574495372d1c |
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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6 #include "render.h" |
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7 #include "ym2612.h" |
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8 #include "psg.h" |
466 | 9 #include "config.h" |
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10 #include "util.h" |
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11 #include <stdint.h> |
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12 #include <stdio.h> |
805 | 13 #include <stdlib.h> |
14 #include <string.h> | |
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15 |
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16 #define MCLKS_NTSC 53693175 |
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17 #define MCLKS_PAL 53203395 |
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18 |
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19 #define MCLKS_PER_68K 7 |
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20 #define MCLKS_PER_YM MCLKS_PER_68K |
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21 #define MCLKS_PER_Z80 15 |
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22 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16) |
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23 |
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24 #pragma pack(push, 1) |
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25 typedef struct { |
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26 char ident[4]; |
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27 uint32_t eof_offset; |
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28 uint32_t version; |
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29 uint32_t sn76489_clk; |
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30 uint32_t ym2413_clk; |
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31 uint32_t gd3_offset; |
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32 uint32_t num_samples; |
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33 uint32_t loop_offset; |
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34 uint32_t loop_samples; |
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35 uint32_t rate; |
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36 uint16_t sn76489_fb; |
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37 uint8_t sn76489_shift; |
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38 uint8_t sn76489_flags; |
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39 uint32_t ym2612_clk; |
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40 uint32_t ym2151_clk; |
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41 uint32_t data_offset; |
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42 uint32_t sega_pcm_clk; |
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43 uint32_t sega_pcm_reg; |
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44 } vgm_header; |
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45 |
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46 enum { |
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47 CMD_PSG_STEREO = 0x4F, |
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48 CMD_PSG, |
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49 CMD_YM2413, |
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50 CMD_YM2612_0, |
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51 CMD_YM2612_1, |
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52 CMD_YM2151, |
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53 CMD_YM2203, |
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54 CMD_YM2608_0, |
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55 CMD_YM2608_1, |
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56 CMD_YM2610_0, |
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57 CMD_YM2610_1, |
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58 CMD_YM3812, |
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59 CMD_YM3526, |
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60 CMD_Y8950, |
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61 CMD_YMZ280B, |
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62 CMD_YMF262_0, |
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63 CMD_YMF262_1, |
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64 CMD_WAIT = 0x61, |
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65 CMD_WAIT_60, |
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66 CMD_WAIT_50, |
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67 CMD_END = 0x66, |
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68 CMD_DATA, |
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69 CMD_PCM_WRITE, |
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70 CMD_WAIT_SHORT = 0x70, |
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71 CMD_YM2612_DAC = 0x80, |
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72 CMD_DAC_STREAM_SETUP = 0x90, |
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73 CMD_DAC_STREAM_DATA, |
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74 CMD_DAC_STREAM_FREQ, |
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75 CMD_DAC_STREAM_START, |
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76 CMD_DAC_STREAM_STOP, |
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77 CMD_DAC_STREAM_STARTFAST, |
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78 CMD_DATA_SEEK = 0xE0 |
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79 }; |
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80 |
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81 enum { |
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82 DATA_YM2612_PCM = 0 |
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83 }; |
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84 |
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85 #pragma pack(pop) |
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86 |
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87 void handle_keydown(int keycode) |
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88 { |
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89 } |
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90 |
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91 void handle_keyup(int keycode) |
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92 { |
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93 } |
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94 |
466 | 95 void handle_joydown(int joystick, int button) |
96 { | |
97 } | |
98 | |
99 void handle_joyup(int joystick, int button) | |
100 { | |
101 } | |
102 | |
103 void handle_joy_dpad(int joystick, int dpadnum, uint8_t value) | |
104 { | |
105 } | |
106 | |
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107 int headless = 0; |
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108 |
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109 #define CYCLE_LIMIT MCLKS_NTSC/60 |
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110 #define MAX_SOUND_CYCLES 100000 |
466 | 111 tern_node * config; |
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112 |
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113 void wait(ym2612_context * y_context, psg_context * p_context, uint32_t * current_cycle, uint32_t cycles) |
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114 { |
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115 while (cycles > MAX_SOUND_CYCLES) |
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116 { |
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117 wait(y_context, p_context, current_cycle, MAX_SOUND_CYCLES); |
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118 cycles -= MAX_SOUND_CYCLES; |
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119 } |
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120 *current_cycle += cycles; |
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121 psg_run(p_context, *current_cycle); |
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122 ym_run(y_context, *current_cycle); |
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124 if (*current_cycle > CYCLE_LIMIT) { |
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125 *current_cycle -= CYCLE_LIMIT; |
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126 p_context->cycles -= CYCLE_LIMIT; |
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127 y_context->current_cycle -= CYCLE_LIMIT; |
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128 process_events(); |
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129 } |
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130 } |
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131 |
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132 typedef struct { |
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133 struct data_block *next; |
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134 uint8_t *data; |
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135 uint32_t size; |
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136 uint8_t type; |
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137 } data_block; |
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138 |
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139 int main(int argc, char ** argv) |
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140 { |
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141 data_block *blocks = NULL; |
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142 data_block *seek_block = NULL; |
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143 uint32_t seek_offset; |
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144 uint32_t block_offset; |
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145 |
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146 uint32_t fps = 60; |
466 | 147 config = load_config(argv[0]); |
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148 render_init(320, 240, "vgm play", 60, 0); |
466 | 149 |
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150 uint32_t opts = 0; |
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151 if (argc >= 3 && !strcmp(argv[2], "-y")) { |
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152 opts |= YM_OPT_WAVE_LOG; |
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153 } |
466 | 154 |
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155 ym2612_context y_context; |
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156 ym_init(&y_context, render_sample_rate(), MCLKS_NTSC, MCLKS_PER_YM, render_audio_buffer(), opts); |
466 | 157 |
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158 psg_context p_context; |
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159 psg_init(&p_context, render_sample_rate(), MCLKS_NTSC, MCLKS_PER_PSG, render_audio_buffer()); |
466 | 160 |
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161 FILE * f = fopen(argv[1], "rb"); |
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162 vgm_header header; |
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163 fread(&header, sizeof(header), 1, f); |
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164 if (header.version < 0x150 || !header.data_offset) { |
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165 header.data_offset = 0xC; |
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166 } |
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167 fseek(f, header.data_offset + 0x34, SEEK_SET); |
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168 uint32_t data_size = header.eof_offset + 4 - (header.data_offset + 0x34); |
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169 uint8_t * data = malloc(data_size); |
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170 fread(data, 1, data_size, f); |
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171 fclose(f); |
466 | 172 |
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173 uint32_t mclks_sample = MCLKS_NTSC / 44100; |
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174 uint32_t loop_count = 2; |
466 | 175 |
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176 uint8_t * end = data + data_size; |
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177 uint8_t * cur = data; |
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178 uint32_t current_cycle = 0; |
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179 while (cur < end) { |
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180 uint8_t cmd = *(cur++); |
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181 switch(cmd) |
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182 { |
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183 case CMD_PSG_STEREO: |
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184 //ignore for now |
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185 cur++; |
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186 break; |
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187 case CMD_PSG: |
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188 psg_write(&p_context, *(cur++)); |
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189 break; |
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190 case CMD_YM2612_0: |
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191 ym_address_write_part1(&y_context, *(cur++)); |
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192 ym_data_write(&y_context, *(cur++)); |
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193 break; |
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194 case CMD_YM2612_1: |
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195 ym_address_write_part2(&y_context, *(cur++)); |
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196 ym_data_write(&y_context, *(cur++)); |
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197 break; |
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198 case CMD_WAIT: { |
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199 uint32_t wait_time = *(cur++); |
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200 wait_time |= *(cur++) << 8; |
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201 wait_time *= mclks_sample; |
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202 wait(&y_context, &p_context, ¤t_cycle, wait_time); |
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203 break; |
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204 } |
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205 case CMD_WAIT_60: |
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206 wait(&y_context, &p_context, ¤t_cycle, 735 * mclks_sample); |
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207 break; |
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208 case CMD_WAIT_50: |
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209 wait(&y_context, &p_context, ¤t_cycle, 882 * mclks_sample); |
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210 break; |
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211 case CMD_END: |
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212 if (header.loop_offset && --loop_count) { |
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213 cur = data + header.loop_offset + 0x1C - (header.data_offset + 0x34); |
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214 } else { |
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215 //TODO: fade out |
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216 return 0; |
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217 } |
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218 break; |
511
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219 case CMD_DATA: { |
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220 cur++; //skip compat command |
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221 uint8_t data_type = *(cur++); |
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222 uint32_t data_size = *(cur++); |
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223 data_size |= *(cur++) << 8; |
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224 data_size |= *(cur++) << 16; |
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225 data_size |= *(cur++) << 24; |
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226 if (data_type == DATA_YM2612_PCM) { |
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227 data_block ** curblock = &blocks; |
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228 while(*curblock) |
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229 { |
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230 curblock = &((*curblock)->next); |
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231 } |
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232 *curblock = malloc(sizeof(data_block)); |
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233 (*curblock)->size = data_size; |
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234 (*curblock)->type = data_type; |
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235 (*curblock)->data = cur; |
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236 (*curblock)->next = NULL; |
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237 } else { |
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238 fprintf(stderr, "Skipping data block with unrecognized type %X\n", data_type); |
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239 } |
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240 cur += data_size; |
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241 break; |
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242 } |
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243 case CMD_DATA_SEEK: { |
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244 uint32_t new_offset = *(cur++); |
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245 new_offset |= *(cur++) << 8; |
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246 new_offset |= *(cur++) << 16; |
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247 new_offset |= *(cur++) << 24; |
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248 if (!seek_block || new_offset < seek_offset) { |
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249 seek_block = blocks; |
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250 seek_offset = 0; |
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251 block_offset = 0; |
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252 } |
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253 while (seek_block && (seek_offset - block_offset + seek_block->size) < new_offset) |
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254 { |
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255 seek_offset += seek_block->size - block_offset; |
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256 seek_block = seek_block->next; |
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257 block_offset = 0; |
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258 } |
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259 block_offset += new_offset-seek_offset; |
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260 seek_offset = new_offset; |
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261 break; |
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262 } |
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263 |
408
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264 default: |
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265 if (cmd >= CMD_WAIT_SHORT && cmd < (CMD_WAIT_SHORT + 0x10)) { |
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266 uint32_t wait_time = (cmd & 0xF) + 1; |
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267 wait_time *= mclks_sample; |
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268 wait(&y_context, &p_context, ¤t_cycle, wait_time); |
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269 } else if (cmd >= CMD_YM2612_DAC && cmd < CMD_DAC_STREAM_SETUP) { |
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270 if (seek_block) { |
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271 ym_address_write_part1(&y_context, 0x2A); |
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272 ym_data_write(&y_context, seek_block->data[block_offset++]); |
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273 seek_offset++; |
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274 if (block_offset > seek_block->size) { |
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275 seek_block = seek_block->next; |
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276 block_offset = 0; |
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277 } |
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278 } else { |
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279 fputs("Encountered DAC write command but data seek pointer is invalid!\n", stderr); |
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280 } |
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281 uint32_t wait_time = (cmd & 0xF); |
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282 if (wait_time) |
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283 { |
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284 wait_time *= mclks_sample; |
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285 wait(&y_context, &p_context, ¤t_cycle, wait_time); |
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286 } |
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287 } else { |
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288 fatal_error("unimplemented command: %X at offset %X\n", cmd, (unsigned int)(cur - data - 1)); |
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289 } |
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290 } |
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291 } |
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292 return 0; |
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293 } |