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annotate libblastem.c @ 1690:319d90025d50

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Implement serialization/deserialization in libretro build
author Mike Pavone <pavone@retrodev.com>
date Sun, 20 Jan 2019 22:19:58 -0800
parents 7f42a93f18a4
children e96d0d3bec7f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1688
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1 #include <stdlib.h>
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2 #include <string.h>
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3 #include "libretro.h"
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4 #include "system.h"
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5 #include "util.h"
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6 #include "vdp.h"
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7 #include "render.h"
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8 #include "io.h"
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9
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10 static retro_environment_t retro_environment;
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11 RETRO_API void retro_set_environment(retro_environment_t re)
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12 {
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13 retro_environment = re;
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14 }
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15
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16 static retro_video_refresh_t retro_video_refresh;
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17 RETRO_API void retro_set_video_refresh(retro_video_refresh_t rvf)
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18 {
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19 retro_video_refresh = rvf;
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20 }
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21
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22 static retro_audio_sample_t retro_audio_sample;
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23 RETRO_API void retro_set_audio_sample(retro_audio_sample_t ras)
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24 {
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25 retro_audio_sample = ras;
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26 }
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27
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28 RETRO_API void retro_set_audio_sample_batch(retro_audio_sample_batch_t rasb)
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29 {
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30 }
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31
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32 static retro_input_poll_t retro_input_poll;
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33 RETRO_API void retro_set_input_poll(retro_input_poll_t rip)
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34 {
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35 retro_input_poll = rip;
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36 }
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37
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38 static retro_input_state_t retro_input_state;
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39 RETRO_API void retro_set_input_state(retro_input_state_t ris)
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40 {
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41 retro_input_state = ris;
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42 }
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43
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44 int headless = 0;
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45 int exit_after = 0;
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46 int z80_enabled = 1;
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47 char *save_filename;
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48 tern_node *config;
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49 uint8_t use_native_states = 1;
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50 system_header *current_system;
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51 system_media media;
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52
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53 RETRO_API void retro_init(void)
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54 {
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55 }
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56
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57 RETRO_API void retro_deinit(void)
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58 {
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59 }
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60
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61 RETRO_API unsigned retro_api_version(void)
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62 {
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63 return RETRO_API_VERSION;
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64 }
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65
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66 RETRO_API void retro_get_system_info(struct retro_system_info *info)
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67 {
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68 info->library_name = "BlastEm";
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69 info->library_version = "0.6.2-pre"; //TODO: share this with blastem.c
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70 info->valid_extensions = "md|gen|sms|bin|rom";
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71 info->need_fullpath = 0;
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72 info->block_extract = 0;
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73 }
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74
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75 static vid_std video_standard;
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76 RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info)
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77 {
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78 info->geometry.base_width = info->geometry.max_width = LINEBUF_SIZE;
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79 info->geometry.base_height = info->geometry.max_height = video_standard == VID_NTSC ? 243 : 294;
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80 info->geometry.aspect_ratio = 0;
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81 info->timing.fps = video_standard == VID_NTSC ? 60 : 50;
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82 info->timing.sample_rate = 53267; //approximate sample rate of YM2612
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83 }
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84
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85 RETRO_API void retro_set_controller_port_device(unsigned port, unsigned device)
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86 {
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87 }
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88
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89 /* Resets the current game. */
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90 RETRO_API void retro_reset(void)
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91 {
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92 current_system->soft_reset(current_system);
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93 }
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94
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95 /* Runs the game for one video frame.
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96 * During retro_run(), input_poll callback must be called at least once.
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97 *
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98 * If a frame is not rendered for reasons where a game "dropped" a frame,
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99 * this still counts as a frame, and retro_run() should explicitly dupe
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100 * a frame if GET_CAN_DUPE returns true.
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101 * In this case, the video callback can take a NULL argument for data.
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102 */
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103 static uint8_t started;
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104 RETRO_API void retro_run(void)
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105 {
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106 if (started) {
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107 current_system->resume_context(current_system);
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108 } else {
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109 current_system->start_context(current_system, NULL);
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110 started = 1;
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111 }
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112 }
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113
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114 /* Returns the amount of data the implementation requires to serialize
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115 * internal state (save states).
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116 * Between calls to retro_load_game() and retro_unload_game(), the
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117 * returned size is never allowed to be larger than a previous returned
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118 * value, to ensure that the frontend can allocate a save state buffer once.
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119 */
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120 static size_t serialize_size_cache;
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121 RETRO_API size_t retro_serialize_size(void)
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122 {
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123 if (!serialize_size_cache) {
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124 uint8_t *tmp = current_system->serialize(current_system, &serialize_size_cache);
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125 free(tmp);
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126 }
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127 return serialize_size_cache;
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128 }
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129
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130 /* Serializes internal state. If failed, or size is lower than
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131 * retro_serialize_size(), it should return false, true otherwise. */
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132 RETRO_API bool retro_serialize(void *data, size_t size)
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133 {
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134 size_t actual_size;
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135 uint8_t *tmp = current_system->serialize(current_system, &actual_size);
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136 if (actual_size > size) {
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137 free(tmp);
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138 return 0;
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139 }
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140 memcpy(data, tmp, actual_size);
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141 free(tmp);
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142 return 1;
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143 }
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144
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145 RETRO_API bool retro_unserialize(const void *data, size_t size)
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146 {
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147 current_system->deserialize(current_system, (uint8_t *)data, size);
1687
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148 return 0;
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149 }
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diff changeset
150
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151 RETRO_API void retro_cheat_reset(void)
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152 {
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diff changeset
153 }
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154
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155 RETRO_API void retro_cheat_set(unsigned index, bool enabled, const char *code)
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156 {
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157 }
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158
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159 /* Loads a game. */
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160 RETRO_API bool retro_load_game(const struct retro_game_info *game)
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diff changeset
161 {
1690
319d90025d50 Implement serialization/deserialization in libretro build
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parents: 1689
diff changeset
162 serialize_size_cache = 0;
1687
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163 if (game->path) {
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164 media.dir = path_dirname(game->path);
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165 media.name = basename_no_extension(game->path);
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166 media.extension = path_extension(game->path);
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167 }
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168 media.buffer = malloc(nearest_pow2(game->size));
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169 memcpy(media.buffer, game->data, game->size);
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170 media.size = game->size;
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171 current_system = alloc_config_system(detect_system_type(&media), &media, 0, 0);
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172
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173 unsigned format = RETRO_PIXEL_FORMAT_XRGB8888;
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174 retro_environment(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &format);
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175 return current_system != NULL;
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176 }
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177
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178 /* Loads a "special" kind of game. Should not be used,
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179 * except in extreme cases. */
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180 RETRO_API bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
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181 {
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182 return retro_load_game(info);
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183 }
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184
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185 /* Unloads a currently loaded game. */
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186 RETRO_API void retro_unload_game(void)
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187 {
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188
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189 free(media.dir);
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190 free(media.name);
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191 free(media.extension);
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192
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193 }
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194
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195 /* Gets region of game. */
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196 RETRO_API unsigned retro_get_region(void)
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197 {
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198 return video_standard == VID_NTSC ? RETRO_REGION_NTSC : RETRO_REGION_PAL;
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199 }
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200
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diff changeset
201 /* Gets region of memory. */
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202 RETRO_API void *retro_get_memory_data(unsigned id)
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diff changeset
203 {
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204 return NULL;
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205 }
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206
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207 RETRO_API size_t retro_get_memory_size(unsigned id)
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208 {
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diff changeset
209 return 0;
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210 }
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211
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212 //blastem render backend API implementation
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213 uint32_t render_map_color(uint8_t r, uint8_t g, uint8_t b)
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214 {
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diff changeset
215 return r << 16 | g << 8 | b;
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216 }
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diff changeset
217
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diff changeset
218 uint8_t render_create_window(char *caption, uint32_t width, uint32_t height, window_close_handler close_handler)
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diff changeset
219 {
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220 //not supported in lib build
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221 return 0;
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diff changeset
222 }
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diff changeset
223
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diff changeset
224 void render_destroy_window(uint8_t which)
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parents:
diff changeset
225 {
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parents:
diff changeset
226 //not supported in lib build
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parents:
diff changeset
227 }
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parents:
diff changeset
228
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diff changeset
229 static uint32_t fb[LINEBUF_SIZE * 294 * 2];
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parents:
diff changeset
230 uint32_t *render_get_framebuffer(uint8_t which, int *pitch)
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parents:
diff changeset
231 {
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diff changeset
232 *pitch = LINEBUF_SIZE * sizeof(uint32_t);
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parents:
diff changeset
233 //TODO: deal with interlace
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diff changeset
234 return fb;
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parents:
diff changeset
235 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
236
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
237 void render_framebuffer_updated(uint8_t which, int width)
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parents:
diff changeset
238 {
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parents:
diff changeset
239 //TODO: Deal with 256 px wide modes
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parents:
diff changeset
240 //TODO: deal with interlace
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
241 retro_video_refresh(fb, LINEBUF_SIZE, video_standard == VID_NTSC ? 243 : 294, LINEBUF_SIZE * sizeof(uint32_t));
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parents:
diff changeset
242 current_system->request_exit(current_system);
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parents:
diff changeset
243 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
244
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parents:
diff changeset
245 uint8_t render_get_active_framebuffer(void)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
246 {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
247 return 0;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
248 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
249
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
250 void render_set_video_standard(vid_std std)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
251 {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
252 video_standard = std;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
253 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
254
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
255 void process_events()
6c54bb5fe3b3 Hacky WIP libertro implementation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
256 {
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parents:
diff changeset
257 static int16_t prev_state[2][RETRO_DEVICE_ID_JOYPAD_L2];
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
258 static const uint8_t map[] = {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
259 BUTTON_A, BUTTON_X, BUTTON_MODE, BUTTON_START, DPAD_UP, DPAD_DOWN,
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
260 DPAD_LEFT, DPAD_RIGHT, BUTTON_B, BUTTON_Y, BUTTON_Z, BUTTON_C
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
261 };
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
262 //TODO: handle other input device types
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
263 //TODO: handle more than 2 ports when appropriate
6c54bb5fe3b3 Hacky WIP libertro implementation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
264 retro_input_poll();
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
265 for (int port = 0; port < 2; port++)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
266 {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
267 for (int id = RETRO_DEVICE_ID_JOYPAD_B; id < RETRO_DEVICE_ID_JOYPAD_L2; id++)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
268 {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
269 int16_t new_state = retro_input_state(port, RETRO_DEVICE_JOYPAD, 0, id);
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
270 if (new_state != prev_state[port][id]) {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
271 if (new_state) {
1689
7f42a93f18a4 Have a suitable default IO port configuration when nonIO is present from the config file. Fixed off by one in processing gamepad button events in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
272 current_system->gamepad_down(current_system, port + 1, map[id]);
1687
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parents:
diff changeset
273 } else {
1689
7f42a93f18a4 Have a suitable default IO port configuration when nonIO is present from the config file. Fixed off by one in processing gamepad button events in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
274 current_system->gamepad_up(current_system, port + 1, map[id]);
1687
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
275 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
276 prev_state[port][id] = new_state;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
277 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
278 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
279 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
280 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
281
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parents:
diff changeset
282 void render_errorbox(char *title, char *message)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
283 {
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parents:
diff changeset
284 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
285 void render_warnbox(char *title, char *message)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
286 {
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parents:
diff changeset
287 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
288 void render_infobox(char *title, char *message)
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
289 {
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parents:
diff changeset
290 }
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
291
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
292 struct audio_source {
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
293 int32_t freq;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
294 int32_t left_accum;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
295 int32_t right_accum;
6c54bb5fe3b3 Hacky WIP libertro implementation
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parents:
diff changeset
296 int32_t num_samples;
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parents:
diff changeset
297 };
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298
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299 static audio_source *audio_sources[8];
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300 static uint8_t num_audio_sources;
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301 audio_source *render_audio_source(uint64_t master_clock, uint64_t sample_divider, uint8_t channels)
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302 {
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303 audio_sources[num_audio_sources] = calloc(1, sizeof(audio_source));
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304 audio_sources[num_audio_sources]->freq = master_clock / sample_divider;
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305 return audio_sources[num_audio_sources++];
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306 }
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307
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308 void render_audio_adjust_clock(audio_source *src, uint64_t master_clock, uint64_t sample_divider)
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309 {
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310 }
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311
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312 static void check_put_sample(void)
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313 {
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314 for (int i = 0; i < num_audio_sources; i++)
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315 {
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316 int32_t min_samples = audio_sources[i]->freq / 53267;
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317 if (audio_sources[i]->num_samples < min_samples) {
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318 return;
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319 }
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320 }
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321 int16_t left = 0, right = 0;
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322 for (int i = 0; i < num_audio_sources; i++)
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323 {
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324 left += audio_sources[i]->left_accum / audio_sources[i]->num_samples;
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325 right += audio_sources[i]->right_accum / audio_sources[i]->num_samples;
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326 audio_sources[i]->left_accum = audio_sources[i]->right_accum = audio_sources[i]->num_samples = 0;
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327 }
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328 retro_audio_sample(left, right);
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329 }
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330
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331 void render_put_mono_sample(audio_source *src, int16_t value)
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332 {
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333 src->left_accum += value;
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334 src->right_accum += value;
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335 src->num_samples++;
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336 check_put_sample();
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337 }
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338 void render_put_stereo_sample(audio_source *src, int16_t left, int16_t right)
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339 {
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340 src->left_accum += left;
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341 src->right_accum += right;
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342 src->num_samples++;
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343 check_put_sample();
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344 }
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345
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346 void render_free_source(audio_source *src)
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347 {
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348 int index;
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349 for (index = 0; index < num_audio_sources; index++)
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350 {
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351 if (audio_sources[index] == src) {
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352 break;
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353 }
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354 }
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355 num_audio_sources--;
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356 audio_sources[index] = audio_sources[num_audio_sources];
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357 free(src);
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358 }
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359
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360 void bindings_set_mouse_mode(uint8_t mode)
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361 {
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362 }