Mercurial > repos > blastem
annotate render_sdl.c @ 478:2e4a4188cfb0
Fix DMA fill so that it does not cause observable changes to the FIFO. Get DMA copy mostly correct from an observable ffect perspective. DMA copy probably does not reflect internal implementation still given that evidence seems to suggest no FIFO usage at all.
author | Mike Pavone <pavone@retrodev.com> |
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date | Tue, 17 Sep 2013 00:11:45 -0700 |
parents | 140af5509ce7 |
children | db5880d8ea03 |
rev | line source |
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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 <stdlib.h> |
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7 #include <stdio.h> |
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8 #include "render.h" |
66 | 9 #include "blastem.h" |
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10 #include "io.h" |
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11 |
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12 SDL_Surface *screen; |
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13 uint8_t render_dbg = 0; |
135 | 14 uint8_t debug_pal = 0; |
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15 |
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16 uint32_t last_frame = 0; |
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17 |
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18 uint32_t min_delay; |
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19 uint32_t frame_delay = 1000/60; |
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20 |
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21 int16_t * current_psg = NULL; |
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22 int16_t * current_ym = NULL; |
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23 |
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24 uint32_t buffer_samples, sample_rate; |
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25 uint32_t missing_count; |
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26 |
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27 SDL_mutex * audio_mutex; |
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28 SDL_cond * audio_ready; |
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29 SDL_cond * psg_cond; |
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30 SDL_cond * ym_cond; |
361 | 31 uint8_t quitting = 0; |
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32 |
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33 void audio_callback(void * userdata, uint8_t *byte_stream, int len) |
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34 { |
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35 //puts("audio_callback"); |
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36 int16_t * stream = (int16_t *)byte_stream; |
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37 int samples = len/(sizeof(int16_t)*2); |
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38 int16_t * psg_buf, * ym_buf; |
361 | 39 uint8_t local_quit; |
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40 SDL_LockMutex(audio_mutex); |
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41 psg_buf = NULL; |
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42 ym_buf = NULL; |
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43 do { |
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44 if (!psg_buf) { |
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45 psg_buf = current_psg; |
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46 current_psg = NULL; |
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47 SDL_CondSignal(psg_cond); |
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48 } |
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49 if (!ym_buf) { |
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50 ym_buf = current_ym; |
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51 current_ym = NULL; |
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52 SDL_CondSignal(ym_cond); |
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53 } |
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54 if (!quitting && (!psg_buf || !ym_buf)) { |
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55 SDL_CondWait(audio_ready, audio_mutex); |
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56 } |
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57 } while(!quitting && (!psg_buf || !ym_buf)); |
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58 |
361 | 59 local_quit = quitting; |
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60 SDL_UnlockMutex(audio_mutex); |
361 | 61 if (!local_quit) { |
62 for (int i = 0; i < samples; i++) { | |
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63 *(stream++) = psg_buf[i] + *(ym_buf++); |
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64 *(stream++) = psg_buf[i] + *(ym_buf++); |
361 | 65 } |
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66 } |
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67 } |
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68 |
361 | 69 void render_close_audio() |
70 { | |
71 SDL_LockMutex(audio_mutex); | |
72 quitting = 1; | |
73 SDL_CondSignal(audio_ready); | |
74 SDL_UnlockMutex(audio_mutex); | |
75 SDL_CloseAudio(); | |
76 } | |
77 | |
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78 SDL_Joystick * joysticks[MAX_JOYSTICKS]; |
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79 int num_joysticks; |
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80 |
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81 int render_num_joysticks() |
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82 { |
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83 return num_joysticks; |
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84 } |
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85 |
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86 uint32_t render_map_color(uint8_t r, uint8_t g, uint8_t b) |
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87 { |
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88 return SDL_MapRGB(screen->format, r, g, b); |
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89 } |
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90 |
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91 uint8_t render_depth() |
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92 { |
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93 return screen->format->BytesPerPixel * 8; |
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94 } |
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95 |
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96 void render_init(int width, int height, char * title, uint32_t fps, uint8_t fullscreen) |
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97 { |
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98 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_JOYSTICK) < 0) { |
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99 fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError()); |
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100 exit(1); |
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101 } |
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102 atexit(SDL_Quit); |
361 | 103 atexit(render_close_audio); |
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104 printf("width: %d, height: %d\n", width, height); |
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105 uint32_t flags = SDL_ANYFORMAT; |
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106 if (fullscreen) { |
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107 flags |= SDL_FULLSCREEN | SDL_HWSURFACE | SDL_DOUBLEBUF; |
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108 } else { |
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109 flags |= SDL_SWSURFACE; |
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110 } |
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111 screen = SDL_SetVideoMode(width, height, 32, flags); |
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112 if (!screen) { |
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113 fprintf(stderr, "Unable to get SDL surface: %s\n", SDL_GetError()); |
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114 exit(1); |
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115 } |
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116 if (screen->format->BytesPerPixel != 2 && screen->format->BytesPerPixel != 4) { |
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117 fprintf(stderr, "BlastEm requires a 16-bit or 32-bit surface, SDL returned a %d-bit surface\n", screen->format->BytesPerPixel * 8); |
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118 exit(1); |
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119 } |
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120 SDL_WM_SetCaption(title, title); |
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121 min_delay = 0; |
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122 for (int i = 0; i < 100; i++) { |
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123 uint32_t start = SDL_GetTicks(); |
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124 SDL_Delay(1); |
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125 uint32_t delay = SDL_GetTicks()-start; |
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126 if (delay > min_delay) { |
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127 min_delay = delay; |
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128 } |
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129 } |
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130 if (!min_delay) { |
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131 min_delay = 1; |
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132 } |
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133 printf("minimum delay: %d\n", min_delay); |
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134 |
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135 frame_delay = 1000/fps; |
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136 |
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137 audio_mutex = SDL_CreateMutex(); |
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138 psg_cond = SDL_CreateCond(); |
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139 ym_cond = SDL_CreateCond(); |
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140 audio_ready = SDL_CreateCond(); |
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141 |
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142 SDL_AudioSpec desired, actual; |
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143 char * rate_str = tern_find_ptr(config, "audiorate"); |
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144 int rate = rate_str ? atoi(rate_str) : 0; |
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145 if (!rate) { |
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146 rate = 48000; |
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147 } |
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148 desired.freq = rate; |
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149 desired.format = AUDIO_S16SYS; |
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150 desired.channels = 2; |
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151 char * samples_str = tern_find_ptr(config, "audiobuffer"); |
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152 int samples = samples_str ? atoi(samples_str) : 0; |
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153 if (!samples) { |
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154 samples = 512; |
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155 } |
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156 printf("config says: %d\n", samples); |
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157 desired.samples = samples*2; |
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158 desired.callback = audio_callback; |
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159 desired.userdata = NULL; |
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160 |
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161 if (SDL_OpenAudio(&desired, &actual) < 0) { |
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162 fprintf(stderr, "Unable to open SDL audio: %s\n", SDL_GetError()); |
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163 exit(1); |
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164 } |
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165 buffer_samples = actual.samples; |
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166 sample_rate = actual.freq; |
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167 printf("Initialized audio at frequency %d with a %d sample buffer\n", actual.freq, actual.samples); |
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168 SDL_PauseAudio(0); |
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169 num_joysticks = SDL_NumJoysticks(); |
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170 if (num_joysticks > MAX_JOYSTICKS) { |
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171 num_joysticks = MAX_JOYSTICKS; |
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172 } |
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173 for (int i = 0; i < num_joysticks; i++) { |
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174 printf("Joystick %d: %s\n", i, SDL_JoystickName(i)); |
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175 SDL_Joystick * joy = joysticks[i] = SDL_JoystickOpen(i); |
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176 if (joy) { |
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177 printf("\tNum Axes: %d\n\tNum Buttons: %d\n\tNum Hats: %d\n", SDL_JoystickNumAxes(joy), SDL_JoystickNumButtons(joy), SDL_JoystickNumHats(joy)); |
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178 } |
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179 } |
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180 SDL_JoystickEventState(SDL_ENABLE); |
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181 } |
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182 |
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183 uint32_t blankbuf[320*240]; |
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184 |
20
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185 void render_context(vdp_context * context) |
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186 { |
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187 uint16_t *buf_16; |
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188 uint32_t *buf_32; |
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189 uint8_t b,g,r; |
54
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190 last_frame = SDL_GetTicks(); |
20
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191 if (SDL_MUSTLOCK(screen)) { |
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|
192 if (SDL_LockSurface(screen) < 0) { |
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|
193 return; |
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|
194 } |
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|
195 } |
33
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196 uint16_t repeat_x = screen->clip_rect.w / 320; |
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197 uint16_t repeat_y = screen->clip_rect.h / 240; |
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198 if (repeat_x > repeat_y) { |
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199 repeat_x = repeat_y; |
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200 } else { |
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|
201 repeat_y = repeat_x; |
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|
202 } |
413
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|
203 int othermask = repeat_y >> 1; |
426
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204 |
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205 if (screen->format->BytesPerPixel == 2) { |
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206 uint16_t *otherbuf = (context->regs[REG_MODE_4] & BIT_INTERLACE) ? context->evenbuf : (uint16_t *)blankbuf; |
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207 uint16_t * oddbuf = context->oddbuf; |
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208 buf_16 = (uint16_t *)screen->pixels; |
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209 for (int y = 0; y < 240; y++) { |
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210 for (int i = 0; i < repeat_y; i++,buf_16 += screen->pitch/2) { |
33
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211 uint16_t *line = buf_16; |
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212 uint16_t *src_line = (i & othermask ? otherbuf : oddbuf) + y * 320; |
33
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213 for (int x = 0; x < 320; x++) { |
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|
214 uint16_t color = *(src_line++); |
33
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|
215 for (int j = 0; j < repeat_x; j++) { |
229
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|
216 *(line++) = color; |
33
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|
217 } |
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|
218 } |
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219 } |
426
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220 } |
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|
221 } else { |
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222 uint32_t *otherbuf = (context->regs[REG_MODE_4] & BIT_INTERLACE) ? context->evenbuf : (uint32_t *)blankbuf; |
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|
223 uint32_t * oddbuf = context->oddbuf; |
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224 buf_32 = (uint32_t *)screen->pixels; |
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|
225 for (int y = 0; y < 240; y++) { |
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226 for (int i = 0; i < repeat_y; i++,buf_32 += screen->pitch/4) { |
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227 uint32_t *line = buf_32; |
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228 uint32_t *src_line = (i & othermask ? otherbuf : oddbuf) + y * 320; |
33
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229 for (int x = 0; x < 320; x++) { |
426
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230 uint32_t color = *(src_line++); |
33
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231 for (int j = 0; j < repeat_x; j++) { |
426
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232 *(line++) = color; |
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233 } |
33
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234 } |
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235 } |
426
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236 } |
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237 } |
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238 if ( SDL_MUSTLOCK(screen) ) { |
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239 SDL_UnlockSurface(screen); |
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240 } |
444
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241 //SDL_UpdateRect(screen, 0, 0, screen->clip_rect.w, screen->clip_rect.h); |
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242 SDL_Flip(screen); |
413
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243 if (context->regs[REG_MODE_4] & BIT_INTERLACE) |
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244 { |
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245 context->framebuf = context->framebuf == context->oddbuf ? context->evenbuf : context->oddbuf; |
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246 } |
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247 } |
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248 |
418
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249 int render_joystick_num_buttons(int joystick) |
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250 { |
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251 if (joystick >= num_joysticks) { |
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252 return 0; |
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253 } |
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254 return SDL_JoystickNumButtons(joysticks[joystick]); |
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255 } |
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256 |
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257 int render_joystick_num_hats(int joystick) |
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258 { |
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259 if (joystick >= num_joysticks) { |
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260 return 0; |
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261 } |
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262 return SDL_JoystickNumHats(joysticks[joystick]); |
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263 } |
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264 |
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265 void render_wait_quit(vdp_context * context) |
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266 { |
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267 SDL_Event event; |
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268 while(SDL_WaitEvent(&event)) { |
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269 switch (event.type) { |
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270 case SDL_KEYDOWN: |
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271 if (event.key.keysym.sym == SDLK_LEFTBRACKET) { |
55
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272 render_dbg++; |
135 | 273 if (render_dbg == 4) { |
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274 render_dbg = 0; |
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275 } |
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276 render_context(context); |
135 | 277 } else if(event.key.keysym.sym == SDLK_RIGHTBRACKET) { |
278 debug_pal++; | |
279 if (debug_pal == 4) { | |
280 debug_pal = 0; | |
281 } | |
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282 } |
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283 break; |
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284 case SDL_QUIT: |
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285 return; |
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286 } |
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287 } |
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288 } |
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289 |
398
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290 void render_debug_mode(uint8_t mode) |
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291 { |
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292 if (mode < 4) { |
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293 render_dbg = mode; |
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294 } |
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295 } |
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296 |
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297 void render_debug_pal(uint8_t pal) |
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298 { |
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299 if (pal < 4) { |
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300 debug_pal = pal; |
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301 } |
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302 } |
66 | 303 |
354
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304 int32_t handle_event(SDL_Event *event) |
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305 { |
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306 switch (event->type) { |
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307 case SDL_KEYDOWN: |
398
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308 handle_keydown(event->key.keysym.sym); |
354
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309 break; |
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310 case SDL_KEYUP: |
398
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311 handle_keyup(event->key.keysym.sym); |
354
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diff
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312 break; |
418
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313 case SDL_JOYBUTTONDOWN: |
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314 handle_joydown(event->jbutton.which, event->jbutton.button); |
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315 break; |
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316 case SDL_JOYBUTTONUP: |
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317 handle_joyup(event->jbutton.which, event->jbutton.button); |
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318 break; |
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319 case SDL_JOYHATMOTION: |
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320 handle_joy_dpad(event->jbutton.which, event->jhat.hat, event->jhat.value); |
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321 break; |
354
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|
322 case SDL_QUIT: |
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|
323 puts(""); |
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324 exit(0); |
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|
325 } |
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326 return 0; |
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|
327 } |
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328 |
63
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|
329 uint32_t frame_counter = 0; |
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diff
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|
330 uint32_t start = 0; |
338
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diff
changeset
|
331 int wait_render_frame(vdp_context * context, int frame_limit) |
54
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diff
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|
332 { |
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|
333 SDL_Event event; |
198
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diff
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|
334 int ret = 0; |
54
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diff
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|
335 while(SDL_PollEvent(&event)) { |
354
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diff
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|
336 ret = handle_event(&event); |
54
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|
337 } |
338
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322
diff
changeset
|
338 if (frame_limit) { |
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diff
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|
339 //TODO: Adjust frame delay so we actually get 60 FPS rather than 62.5 FPS |
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|
340 uint32_t current = SDL_GetTicks(); |
342
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diff
changeset
|
341 uint32_t desired = last_frame + frame_delay; |
338
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diff
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|
342 if (current < desired) { |
342
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340
diff
changeset
|
343 uint32_t delay = last_frame + frame_delay - current; |
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diff
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|
344 if (delay > min_delay) { |
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|
345 SDL_Delay((delay/min_delay)*min_delay); |
338
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|
346 } |
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|
347 while ((desired) >= SDL_GetTicks()) { |
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348 } |
54
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349 } |
338
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|
350 } |
54
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|
351 render_context(context); |
229
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diff
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352 |
272 | 353 |
64
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63
diff
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|
354 //TODO: Figure out why this causes segfaults |
272 | 355 /*frame_counter++; |
63
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diff
changeset
|
356 if ((last_frame - start) > 1000) { |
272 | 357 if (start && (last_frame-start)) { |
63
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diff
changeset
|
358 printf("\r%f fps", ((float)frame_counter) / (((float)(last_frame-start)) / 1000.0)); |
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diff
changeset
|
359 fflush(stdout); |
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diff
changeset
|
360 } |
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diff
changeset
|
361 start = last_frame; |
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diff
changeset
|
362 frame_counter = 0; |
64
2b1a65f4b85d
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parents:
63
diff
changeset
|
363 }*/ |
198
209a37eed3e7
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364 return ret; |
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365 } |
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366 |
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367 void process_events() |
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368 { |
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369 SDL_Event event; |
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370 while(SDL_PollEvent(&event)) { |
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371 handle_event(&event); |
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372 } |
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373 } |
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374 |
364
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375 void render_wait_psg(psg_context * context) |
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376 { |
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377 SDL_LockMutex(audio_mutex); |
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378 while (current_psg != NULL) { |
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379 SDL_CondWait(psg_cond, audio_mutex); |
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380 } |
364
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381 current_psg = context->audio_buffer; |
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382 SDL_CondSignal(audio_ready); |
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383 |
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384 context->audio_buffer = context->back_buffer; |
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385 context->back_buffer = current_psg; |
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386 SDL_UnlockMutex(audio_mutex); |
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387 context->buffer_pos = 0; |
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388 } |
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389 |
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390 void render_wait_ym(ym2612_context * context) |
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391 { |
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392 SDL_LockMutex(audio_mutex); |
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393 while (current_ym != NULL) { |
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394 SDL_CondWait(ym_cond, audio_mutex); |
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395 } |
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396 current_ym = context->audio_buffer; |
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397 SDL_CondSignal(audio_ready); |
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398 |
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399 context->audio_buffer = context->back_buffer; |
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400 context->back_buffer = current_ym; |
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401 SDL_UnlockMutex(audio_mutex); |
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402 context->buffer_pos = 0; |
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403 } |
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404 |
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405 void render_fps(uint32_t fps) |
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406 { |
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407 frame_delay = 1000/fps; |
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408 } |
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409 |
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410 uint32_t render_audio_buffer() |
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411 { |
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412 return buffer_samples; |
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413 } |
342
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414 |
354
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415 uint32_t render_sample_rate() |
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416 { |
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417 return sample_rate; |
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418 } |
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419 |
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420 |