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comparison libblastem.c @ 1889:377f110e4cea

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Report more accurate frame and sample rates to frontend in libretro target
author Michael Pavone <pavone@retrodev.com>
date Sat, 21 Sep 2019 20:26:12 -0700
parents 62e8a8833e39
children 81b059e3ded6
comparison
equal deleted inserted replaced
1888:bd60e74fd173 1889:377f110e4cea
124 overscan_right = 14; 124 overscan_right = 14;
125 } 125 }
126 } 126 }
127 } 127 }
128 128
129 static int32_t sample_rate;
129 RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info) 130 RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info)
130 { 131 {
131 update_overscan(); 132 update_overscan();
132 last_width = LINEBUF_SIZE; 133 last_width = LINEBUF_SIZE;
133 info->geometry.base_width = info->geometry.max_width = LINEBUF_SIZE - (overscan_left + overscan_right); 134 info->geometry.base_width = info->geometry.max_width = LINEBUF_SIZE - (overscan_left + overscan_right);
134 info->geometry.base_height = (video_standard == VID_NTSC ? 243 : 294) - (overscan_top + overscan_bot); 135 info->geometry.base_height = (video_standard == VID_NTSC ? 243 : 294) - (overscan_top + overscan_bot);
135 last_height = info->geometry.base_height; 136 last_height = info->geometry.base_height;
136 info->geometry.max_height = info->geometry.base_height * 2; 137 info->geometry.max_height = info->geometry.base_height * 2;
137 info->geometry.aspect_ratio = 0; 138 info->geometry.aspect_ratio = 0;
138 info->timing.fps = video_standard == VID_NTSC ? 60 : 50; 139 double master_clock = video_standard == VID_NTSC ? 53693175 : 53203395;
139 info->timing.sample_rate = 53267; //approximate sample rate of YM2612 140 double lines = video_standard == VID_NTSC ? 262 : 313;
141 info->timing.fps = master_clock / (3420.0 * lines);
142 info->timing.sample_rate = master_clock / (7 * 6 * 24); //sample rate of YM2612
143 sample_rate = info->timing.sample_rate;
140 } 144 }
141 145
142 RETRO_API void retro_set_controller_port_device(unsigned port, unsigned device) 146 RETRO_API void retro_set_controller_port_device(unsigned port, unsigned device)
143 { 147 {
144 } 148 }
414 418
415 static void check_put_sample(void) 419 static void check_put_sample(void)
416 { 420 {
417 for (int i = 0; i < num_audio_sources; i++) 421 for (int i = 0; i < num_audio_sources; i++)
418 { 422 {
419 int32_t min_samples = audio_sources[i]->freq / 53267; 423 int32_t min_samples = audio_sources[i]->freq / sample_rate;
420 if (audio_sources[i]->num_samples < min_samples) { 424 if (audio_sources[i]->num_samples < min_samples) {
421 return; 425 return;
422 } 426 }
423 } 427 }
424 int16_t left = 0, right = 0; 428 int16_t left = 0, right = 0;