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annotate gen_player.c @ 2005:3ce38692a3f2

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Set initial pan bits in YM2612 register array and not just the separate lr field of the channel. This fixes an issue in which some channels would be silent in VGM log output
author Michael Pavone <pavone@retrodev.com>
date Sun, 11 Oct 2020 22:42:10 -0700
parents a042e046f7f2
children 01ff005b08f6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1986
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parents: 1967
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1 #include <stdlib.h>
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2 #include "gen_player.h"
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3 #include "event_log.h"
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4 #include "render.h"
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5
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6 #define MCLKS_NTSC 53693175
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7 #define MCLKS_PAL 53203395
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8 #define MCLKS_PER_YM 7
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9 #define MCLKS_PER_Z80 15
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10 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16)
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11
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12 #ifdef IS_LIB
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13 #define MAX_SOUND_CYCLES (MCLKS_PER_YM*NUM_OPERATORS*6*4)
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14 #else
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15 #define MAX_SOUND_CYCLES 100000
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16 #endif
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17
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18 static void sync_sound(gen_player *gen, uint32_t target)
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19 {
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20 //printf("YM | Cycle: %d, bpos: %d, PSG | Cycle: %d, bpos: %d\n", gen->ym->current_cycle, gen->ym->buffer_pos, gen->psg->cycles, gen->psg->buffer_pos * 2);
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21 while (target > gen->psg->cycles && target - gen->psg->cycles > MAX_SOUND_CYCLES) {
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22 uint32_t cur_target = gen->psg->cycles + MAX_SOUND_CYCLES;
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23 //printf("Running PSG to cycle %d\n", cur_target);
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24 psg_run(gen->psg, cur_target);
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25 //printf("Running YM-2612 to cycle %d\n", cur_target);
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26 ym_run(gen->ym, cur_target);
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27 }
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28 psg_run(gen->psg, target);
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29 ym_run(gen->ym, target);
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30
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31 //printf("Target: %d, YM bufferpos: %d, PSG bufferpos: %d\n", target, gen->ym->buffer_pos, gen->psg->buffer_pos * 2);
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32 }
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33
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34 static void run(gen_player *player)
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35 {
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36 while(player->reader.socket || player->reader.buffer.cur_pos < player->reader.buffer.size)
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37 {
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38 uint32_t cycle;
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39 uint8_t event = reader_next_event(&player->reader, &cycle);
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40 switch (event)
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41 {
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42 case EVENT_FLUSH:
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43 sync_sound(player, cycle);
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44 vdp_run_context(player->vdp, cycle);
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45 break;
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46 case EVENT_ADJUST: {
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47 sync_sound(player, cycle);
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48 vdp_run_context(player->vdp, cycle);
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49 uint32_t deduction = load_int32(&player->reader.buffer);
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50 ym_adjust_cycles(player->ym, deduction);
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51 vdp_adjust_cycles(player->vdp, deduction);
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52 player->psg->cycles -= deduction;
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53 break;
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54 case EVENT_PSG_REG:
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55 sync_sound(player, cycle);
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56 reader_ensure_data(&player->reader, 1);
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57 psg_write(player->psg, load_int8(&player->reader.buffer));
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58 break;
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59 case EVENT_YM_REG: {
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60 sync_sound(player, cycle);
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61 reader_ensure_data(&player->reader, 3);
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62 uint8_t part = load_int8(&player->reader.buffer);
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63 uint8_t reg = load_int8(&player->reader.buffer);
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64 uint8_t value = load_int8(&player->reader.buffer);
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65 if (part) {
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66 ym_address_write_part2(player->ym, reg);
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67 } else {
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68 ym_address_write_part1(player->ym, reg);
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69 }
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70 ym_data_write(player->ym, value);
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71 break;
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72 case EVENT_STATE: {
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73 reader_ensure_data(&player->reader, 3);
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74 uint32_t size = load_int8(&player->reader.buffer) << 16;
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75 size |= load_int16(&player->reader.buffer);
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76 reader_ensure_data(&player->reader, size);
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77 deserialize_buffer buffer;
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78 init_deserialize(&buffer, player->reader.buffer.data + player->reader.buffer.cur_pos, size);
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79 register_section_handler(&buffer, (section_handler){.fun = vdp_deserialize, .data = player->vdp}, SECTION_VDP);
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80 register_section_handler(&buffer, (section_handler){.fun = ym_deserialize, .data = player->ym}, SECTION_YM2612);
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81 register_section_handler(&buffer, (section_handler){.fun = psg_deserialize, .data = player->psg}, SECTION_PSG);
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82 while (buffer.cur_pos < buffer.size)
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83 {
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84 load_section(&buffer);
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85 }
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86 player->reader.buffer.cur_pos += size;
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87 free(buffer.handlers);
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88 break;
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89 }
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90 default:
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91 vdp_run_context(player->vdp, cycle);
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92 vdp_replay_event(player->vdp, event, &player->reader);
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93 }
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94 }
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95
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96 }
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97 if (!player->reader.socket) {
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98 reader_ensure_data(&player->reader, 1);
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99 }
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100 }
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101 }
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102
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103 static int thread_main(void *player)
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104 {
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105 run(player);
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106 return 0;
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107 }
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108
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109 void start_context(system_header *sys, char *statefile)
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110 {
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111 gen_player *player = (gen_player *)sys;
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112 if (player->reader.socket) {
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113 #ifndef IS_LIB
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114 render_create_thread(&player->thread, "player", thread_main, player);
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115 #endif
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116 } else {
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117 run(player);
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118 }
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119 }
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120
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121 static void gamepad_down(system_header *system, uint8_t gamepad_num, uint8_t button)
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122 {
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123 gen_player *player = (gen_player *)system;
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124 reader_send_gamepad_event(&player->reader, gamepad_num, button, 1);
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125 }
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126
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127 static void gamepad_up(system_header *system, uint8_t gamepad_num, uint8_t button)
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128 {
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129 gen_player *player = (gen_player *)system;
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130 reader_send_gamepad_event(&player->reader, gamepad_num, button, 0);
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131 }
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132
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133 static void config_common(gen_player *player)
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134 {
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135 uint8_t vid_std = load_int8(&player->reader.buffer);
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136 uint8_t name_len = load_int8(&player->reader.buffer);
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137 player->header.info.name = calloc(1, name_len + 1);
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138 load_buffer8(&player->reader.buffer, player->header.info.name, name_len);
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139
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140 player->vdp = init_vdp_context(vid_std == VID_PAL, 0);
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141 render_set_video_standard(vid_std);
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142 uint32_t master_clock = vid_std == VID_NTSC ? MCLKS_NTSC : MCLKS_PAL;
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143
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144 player->ym = malloc(sizeof(ym2612_context));
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145 ym_init(player->ym, master_clock, MCLKS_PER_YM, 0);
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146
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147 player->psg = malloc(sizeof(psg_context));
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148 psg_init(player->psg, master_clock, MCLKS_PER_PSG);
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149
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150 player->header.start_context = start_context;
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151 player->header.gamepad_down = gamepad_down;
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152 player->header.gamepad_up = gamepad_up;
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153 player->header.type = SYSTEM_GENESIS_PLAYER;
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154 player->header.info.save_type = SAVE_NONE;
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155 }
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156
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157 gen_player *alloc_config_gen_player(void *stream, uint32_t rom_size)
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158 {
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159 uint8_t *data = stream;
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160 gen_player *player = calloc(1, sizeof(gen_player));
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161 init_event_reader(&player->reader, data + 9, rom_size - 9);
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162 config_common(player);
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163 return player;
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164 }
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165
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166 gen_player *alloc_config_gen_player_reader(event_reader *reader)
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167 {
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168 gen_player *player = calloc(1, sizeof(gen_player));
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169 player->reader = *reader;
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170 inflateCopy(&player->reader.input_stream, &reader->input_stream);
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171 render_set_external_sync(1);
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172 config_common(player);
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173 return player;
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174 }
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175