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comparison ym2612.c @ 884:252dfd29831d

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Selecting a second game from the menu now works
author Michael Pavone <pavone@retrodev.com>
date Fri, 13 Nov 2015 22:56:59 -0800
parents 46bb673eed4e
children 0ee8cfcc06d1
comparison
equal deleted inserted replaced
883:9f149f0e98b7 884:252dfd29831d
102 102
103 ym2612_context * log_context = NULL; 103 ym2612_context * log_context = NULL;
104 104
105 void ym_finalize_log() 105 void ym_finalize_log()
106 { 106 {
107 if (!log_context) {
108 return;
109 }
107 for (int i = 0; i < NUM_CHANNELS; i++) { 110 for (int i = 0; i < NUM_CHANNELS; i++) {
108 if (log_context->channels[i].logfile) { 111 if (log_context->channels[i].logfile) {
109 wave_finalize(log_context->channels[i].logfile); 112 wave_finalize(log_context->channels[i].logfile);
110 } 113 }
111 } 114 }
115 log_context = NULL;
112 } 116 }
113 #define BUFFER_INC_RES 1000000000UL 117 #define BUFFER_INC_RES 1000000000UL
114 118
115 void ym_adjust_master_clock(ym2612_context * context, uint32_t master_clock) 119 void ym_adjust_master_clock(ym2612_context * context, uint32_t master_clock)
116 { 120 {
122 #define log2(x) (log(x)/log(2)) 126 #define log2(x) (log(x)/log(2))
123 #endif 127 #endif
124 128
125 void ym_init(ym2612_context * context, uint32_t sample_rate, uint32_t master_clock, uint32_t clock_div, uint32_t sample_limit, uint32_t options) 129 void ym_init(ym2612_context * context, uint32_t sample_rate, uint32_t master_clock, uint32_t clock_div, uint32_t sample_limit, uint32_t options)
126 { 130 {
131 static uint8_t registered_finalize;
127 dfopen(debug_file, "ym_debug.txt", "w"); 132 dfopen(debug_file, "ym_debug.txt", "w");
128 memset(context, 0, sizeof(*context)); 133 memset(context, 0, sizeof(*context));
129 context->audio_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2); 134 context->audio_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2);
130 context->back_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2); 135 context->back_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2);
131 context->sample_rate = sample_rate; 136 context->sample_rate = sample_rate;
155 } 160 }
156 } 161 }
157 } 162 }
158 if (options & YM_OPT_WAVE_LOG) { 163 if (options & YM_OPT_WAVE_LOG) {
159 log_context = context; 164 log_context = context;
160 atexit(ym_finalize_log); 165 if (!registered_finalize) {
166 atexit(ym_finalize_log);
167 registered_finalize = 1;
168 }
161 } 169 }
162 if (!did_tbl_init) { 170 if (!did_tbl_init) {
163 //populate sine table 171 //populate sine table
164 for (int32_t i = 0; i < 512; i++) { 172 for (int32_t i = 0; i < 512; i++) {
165 double sine = sin( ((double)(i*2+1) / SINE_TABLE_SIZE) * M_PI_2 ); 173 double sine = sin( ((double)(i*2+1) / SINE_TABLE_SIZE) * M_PI_2 );
214 lfo_pm_table[freq * 256 + pms * 32 + step] = value; 222 lfo_pm_table[freq * 256 + pms * 32 + step] = value;
215 } 223 }
216 } 224 }
217 } 225 }
218 } 226 }
227 }
228
229 void ym_free(ym2612_context *context)
230 {
231 if (context == log_context) {
232 ym_finalize_log();
233 }
234 free(context->audio_buffer);
235 //TODO: Figure out how to make this 100% safe
236 //audio thread could still be using this
237 free(context->back_buffer);
238 free(context);
219 } 239 }
220 240
221 #define YM_VOLUME_MULTIPLIER 2 241 #define YM_VOLUME_MULTIPLIER 2
222 #define YM_VOLUME_DIVIDER 3 242 #define YM_VOLUME_DIVIDER 3
223 #define YM_MOD_SHIFT 1 243 #define YM_MOD_SHIFT 1