Mercurial > repos > blastem
annotate vgmplay.c @ 884:252dfd29831d
Selecting a second game from the menu now works
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 13 Nov 2015 22:56:59 -0800 |
parents | 7068a9db6dd0 |
children | 12b1a8a32306 |
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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 void handle_keydown(int keycode) |
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25 { |
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26 } |
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27 |
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28 void handle_keyup(int keycode) |
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29 { |
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30 } |
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31 |
466 | 32 void handle_joydown(int joystick, int button) |
33 { | |
34 } | |
35 | |
36 void handle_joyup(int joystick, int button) | |
37 { | |
38 } | |
39 | |
40 void handle_joy_dpad(int joystick, int dpadnum, uint8_t value) | |
41 { | |
42 } | |
43 | |
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44 int headless = 0; |
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45 |
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46 #define CYCLE_LIMIT MCLKS_NTSC/60 |
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47 #define MAX_SOUND_CYCLES 100000 |
466 | 48 tern_node * config; |
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49 |
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50 void vgm_wait(ym2612_context * y_context, psg_context * p_context, uint32_t * current_cycle, uint32_t cycles) |
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51 { |
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52 while (cycles > MAX_SOUND_CYCLES) |
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53 { |
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54 vgm_wait(y_context, p_context, current_cycle, MAX_SOUND_CYCLES); |
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55 cycles -= MAX_SOUND_CYCLES; |
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56 } |
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57 *current_cycle += cycles; |
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58 psg_run(p_context, *current_cycle); |
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59 ym_run(y_context, *current_cycle); |
466 | 60 |
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61 if (*current_cycle > CYCLE_LIMIT) { |
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62 *current_cycle -= CYCLE_LIMIT; |
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63 p_context->cycles -= CYCLE_LIMIT; |
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64 y_context->current_cycle -= CYCLE_LIMIT; |
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65 process_events(); |
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66 } |
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67 } |
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68 |
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69 int main(int argc, char ** argv) |
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70 { |
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71 set_exe_str(argv[0]); |
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72 data_block *blocks = NULL; |
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73 data_block *seek_block = NULL; |
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74 uint32_t seek_offset; |
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75 uint32_t block_offset; |
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76 |
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77 uint32_t fps = 60; |
466 | 78 config = load_config(argv[0]); |
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79 render_init(320, 240, "vgm play", 60, 0); |
466 | 80 |
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81 uint32_t opts = 0; |
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82 if (argc >= 3 && !strcmp(argv[2], "-y")) { |
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83 opts |= YM_OPT_WAVE_LOG; |
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84 } |
466 | 85 |
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86 ym2612_context y_context; |
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87 ym_init(&y_context, render_sample_rate(), MCLKS_NTSC, MCLKS_PER_YM, render_audio_buffer(), opts); |
466 | 88 |
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89 psg_context p_context; |
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90 psg_init(&p_context, render_sample_rate(), MCLKS_NTSC, MCLKS_PER_PSG, render_audio_buffer()); |
466 | 91 |
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92 FILE * f = fopen(argv[1], "rb"); |
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93 vgm_header header; |
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94 fread(&header, sizeof(header), 1, f); |
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95 if (header.version < 0x150 || !header.data_offset) { |
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96 header.data_offset = 0xC; |
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97 } |
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98 fseek(f, header.data_offset + 0x34, SEEK_SET); |
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99 uint32_t data_size = header.eof_offset + 4 - (header.data_offset + 0x34); |
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100 uint8_t * data = malloc(data_size); |
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101 fread(data, 1, data_size, f); |
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102 fclose(f); |
466 | 103 |
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104 uint32_t mclks_sample = MCLKS_NTSC / 44100; |
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105 uint32_t loop_count = 2; |
466 | 106 |
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107 uint8_t * end = data + data_size; |
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108 uint8_t * cur = data; |
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109 uint32_t current_cycle = 0; |
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110 while (cur < end) { |
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111 uint8_t cmd = *(cur++); |
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112 switch(cmd) |
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113 { |
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114 case CMD_PSG_STEREO: |
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115 //ignore for now |
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116 cur++; |
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117 break; |
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118 case CMD_PSG: |
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119 psg_write(&p_context, *(cur++)); |
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120 break; |
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121 case CMD_YM2612_0: |
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122 ym_address_write_part1(&y_context, *(cur++)); |
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123 ym_data_write(&y_context, *(cur++)); |
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124 break; |
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125 case CMD_YM2612_1: |
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126 ym_address_write_part2(&y_context, *(cur++)); |
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127 ym_data_write(&y_context, *(cur++)); |
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128 break; |
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129 case CMD_WAIT: { |
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130 uint32_t wait_time = *(cur++); |
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131 wait_time |= *(cur++) << 8; |
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132 wait_time *= mclks_sample; |
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133 vgm_wait(&y_context, &p_context, ¤t_cycle, wait_time); |
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134 break; |
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135 } |
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136 case CMD_WAIT_60: |
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137 vgm_wait(&y_context, &p_context, ¤t_cycle, 735 * mclks_sample); |
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138 break; |
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139 case CMD_WAIT_50: |
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140 vgm_wait(&y_context, &p_context, ¤t_cycle, 882 * mclks_sample); |
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141 break; |
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142 case CMD_END: |
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143 if (header.loop_offset && --loop_count) { |
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144 cur = data + header.loop_offset + 0x1C - (header.data_offset + 0x34); |
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145 } else { |
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146 //TODO: fade out |
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147 return 0; |
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148 } |
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149 break; |
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150 case CMD_DATA: { |
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151 cur++; //skip compat command |
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152 uint8_t data_type = *(cur++); |
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153 uint32_t data_size = *(cur++); |
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154 data_size |= *(cur++) << 8; |
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155 data_size |= *(cur++) << 16; |
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156 data_size |= *(cur++) << 24; |
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157 if (data_type == DATA_YM2612_PCM) { |
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158 data_block ** curblock = &blocks; |
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159 while(*curblock) |
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160 { |
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161 curblock = &((*curblock)->next); |
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162 } |
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163 *curblock = malloc(sizeof(data_block)); |
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164 (*curblock)->size = data_size; |
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165 (*curblock)->type = data_type; |
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166 (*curblock)->data = cur; |
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167 (*curblock)->next = NULL; |
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168 } else { |
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169 fprintf(stderr, "Skipping data block with unrecognized type %X\n", data_type); |
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170 } |
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171 cur += data_size; |
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172 break; |
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173 } |
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174 case CMD_DATA_SEEK: { |
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175 uint32_t new_offset = *(cur++); |
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176 new_offset |= *(cur++) << 8; |
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177 new_offset |= *(cur++) << 16; |
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178 new_offset |= *(cur++) << 24; |
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179 if (!seek_block || new_offset < seek_offset) { |
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180 seek_block = blocks; |
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181 seek_offset = 0; |
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182 block_offset = 0; |
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183 } |
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184 while (seek_block && (seek_offset - block_offset + seek_block->size) < new_offset) |
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185 { |
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186 seek_offset += seek_block->size - block_offset; |
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187 seek_block = seek_block->next; |
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188 block_offset = 0; |
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189 } |
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190 block_offset += new_offset-seek_offset; |
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191 seek_offset = new_offset; |
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192 break; |
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193 } |
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194 |
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195 default: |
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196 if (cmd >= CMD_WAIT_SHORT && cmd < (CMD_WAIT_SHORT + 0x10)) { |
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197 uint32_t wait_time = (cmd & 0xF) + 1; |
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198 wait_time *= mclks_sample; |
812
574495372d1c
Finish OS X support in build_release script. Fix a name conflict in vgmplay on OS X. Call set_exe_str in vgmplay and stateview
Michael Pavone <pavone@retrodev.com>
parents:
805
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199 vgm_wait(&y_context, &p_context, ¤t_cycle, wait_time); |
511
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200 } else if (cmd >= CMD_YM2612_DAC && cmd < CMD_DAC_STREAM_SETUP) { |
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201 if (seek_block) { |
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202 ym_address_write_part1(&y_context, 0x2A); |
512
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203 ym_data_write(&y_context, seek_block->data[block_offset++]); |
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204 seek_offset++; |
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205 if (block_offset > seek_block->size) { |
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206 seek_block = seek_block->next; |
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207 block_offset = 0; |
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208 } |
511
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209 } else { |
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210 fputs("Encountered DAC write command but data seek pointer is invalid!\n", stderr); |
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211 } |
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212 uint32_t wait_time = (cmd & 0xF); |
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213 if (wait_time) |
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214 { |
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215 wait_time *= mclks_sample; |
812
574495372d1c
Finish OS X support in build_release script. Fix a name conflict in vgmplay on OS X. Call set_exe_str in vgmplay and stateview
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parents:
805
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216 vgm_wait(&y_context, &p_context, ¤t_cycle, wait_time); |
511
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217 } |
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218 } else { |
792
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Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
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219 fatal_error("unimplemented command: %X at offset %X\n", cmd, (unsigned int)(cur - data - 1)); |
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220 } |
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221 } |
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222 } |
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223 return 0; |
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224 } |