3 * (c) Copyright Dave, 2004
\r
4 * (C) notaz, 2006-2009
\r
6 * This work is licensed under the terms of MAME license.
\r
7 * See COPYING file in the top-level directory.
\r
12 #include "sn76496.h"
\r
13 #include "../pico_int.h"
\r
14 #include "../cd/cue.h"
\r
17 #define SIMPLE_WRITE_SOUND 0
\r
19 void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;
\r
21 // master int buffer to mix to
\r
22 static int PsndBuffer[2*(44100+100)/50];
\r
25 static unsigned short dac_info[312+4]; // pppppppp ppppllll, p - pos in buff, l - length to write for this sample
\r
27 // cdda output buffer
\r
28 short cdda_out_buffer[2*1152];
\r
32 int PsndLen=0; // number of mono samples, multiply by 2 for stereo
\r
33 int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60
\r
34 int PsndLen_exc_cnt=0;
\r
36 short *PsndOut=NULL; // PCM data buffer
\r
39 int timer_a_next_oflow, timer_a_step; // in z80 cycles
\r
40 int timer_b_next_oflow, timer_b_step;
\r
43 extern int *sn76496_regs;
\r
46 static void dac_recalculate(void)
\r
48 int i, dac_cnt, pos, len, lines = Pico.m.pal ? 312 : 262, mid = Pico.m.pal ? 68 : 93;
\r
50 if (PsndLen <= lines)
\r
57 for(i=226; i != 225; i++)
\r
59 if (i >= lines) i = 0;
\r
67 dac_info[i] = (pos<<4)|len;
\r
75 for(i = 225; i != 224; i++)
\r
77 if (i >= lines) i = 0;
\r
79 while(dac_cnt >= 0) {
\r
83 if (i == mid) // midpoint
\r
84 while(pos+len < PsndLen/2) {
\r
89 dac_info[i] = (pos<<4)|len;
\r
93 for(len = 0, i = pos; i < PsndLen; i++) len++;
\r
94 if (PsndLen_exc_add) len++;
\r
95 dac_info[224] = (pos<<4)|len;
\r
97 mid = (dac_info[lines-1] & 0xfff0) + ((dac_info[lines-1] & 0xf) << 4);
\r
98 for (i = lines; i < sizeof(dac_info) / sizeof(dac_info[0]); i++)
\r
100 //for(i=len=0; i < lines; i++) {
\r
101 // printf("%03i : %03i : %i\n", i, dac_info[i]>>4, dac_info[i]&0xf);
\r
102 // len+=dac_info[i]&0xf;
\r
104 //printf("rate is %i, len %f\n", PsndRate, (double)PsndRate/(Pico.m.pal ? 50.0 : 60.0));
\r
105 //printf("len total: %i, last pos: %i\n", len, pos);
\r
110 PICO_INTERNAL void PsndReset(void)
\r
112 // PsndRerate calls YM2612Init, which also resets
\r
118 // to be called after changing sound rate or chips
\r
119 void PsndRerate(int preserve_state)
\r
121 void *state = NULL;
\r
122 int target_fps = Pico.m.pal ? 50 : 60;
\r
124 if (preserve_state) {
\r
125 state = malloc(0x204);
\r
126 if (state == NULL) return;
\r
127 ym2612_pack_state();
\r
128 memcpy(state, YM2612GetRegs(), 0x204);
\r
130 YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);
\r
131 if (preserve_state) {
\r
132 // feed it back it's own registers, just like after loading state
\r
133 memcpy(YM2612GetRegs(), state, 0x204);
\r
134 ym2612_unpack_state();
\r
135 if ((PicoAHW & PAHW_MCD) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))
\r
139 if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state
\r
140 SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);
\r
141 if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state
\r
146 // calculate PsndLen
\r
147 PsndLen=PsndRate / target_fps;
\r
148 PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;
\r
151 // recalculate dac info
\r
154 // clear all buffers
\r
155 memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);
\r
156 memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));
\r
161 PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;
\r
163 if (PicoAHW & PAHW_PICO)
\r
168 PICO_INTERNAL void PsndDoDAC(int line_to)
\r
170 int pos, pos1, len;
\r
171 int dout = ym2612.dacout;
\r
172 int line_from = PsndDacLine;
\r
174 if (line_to >= 312)
\r
177 PsndDacLine = line_to + 1;
\r
179 pos =dac_info[line_from]>>4;
\r
180 pos1=dac_info[line_to];
\r
181 len = ((pos1>>4)-pos) + (pos1&0xf);
\r
184 if (PicoOpt & POPT_EN_STEREO) {
\r
185 short *d = PsndOut + pos*2;
\r
186 for (; len > 0; len--, d+=2) *d = dout;
\r
188 short *d = PsndOut + pos;
\r
189 for (; len > 0; len--, d++) *d = dout;
\r
194 static pm_file *cdda_stream = NULL;
\r
196 static void cdda_raw_update(int *buffer, int length)
\r
198 int ret, cdda_bytes, mult = 1;
\r
199 if (cdda_stream == NULL)
\r
202 cdda_bytes = length*4;
\r
203 if (PsndRate <= 22050 + 100) mult = 2;
\r
204 if (PsndRate < 22050 - 100) mult = 4;
\r
205 cdda_bytes *= mult;
\r
207 ret = pm_read(cdda_out_buffer, cdda_bytes, cdda_stream);
\r
208 if (ret < cdda_bytes) {
\r
209 memset((char *)cdda_out_buffer + ret, 0, cdda_bytes - ret);
\r
210 cdda_stream = NULL;
\r
216 case 1: mix_16h_to_32(buffer, cdda_out_buffer, length*2); break;
\r
217 case 2: mix_16h_to_32_s1(buffer, cdda_out_buffer, length*2); break;
\r
218 case 4: mix_16h_to_32_s2(buffer, cdda_out_buffer, length*2); break;
\r
222 PICO_INTERNAL void cdda_start_play(void)
\r
224 int lba_offset, index, lba_length, i;
\r
226 elprintf(EL_STATUS, "cdda play track #%i", Pico_mcd->scd.Cur_Track);
\r
228 index = Pico_mcd->scd.Cur_Track - 1;
\r
230 lba_offset = Pico_mcd->scd.Cur_LBA - Track_to_LBA(index + 1);
\r
231 if (lba_offset < 0) lba_offset = 0;
\r
232 lba_offset += Pico_mcd->TOC.Tracks[index].Offset;
\r
234 // find the actual file for this track
\r
235 for (i = index; i > 0; i--)
\r
236 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;
\r
238 if (Pico_mcd->TOC.Tracks[i].F == NULL) {
\r
239 elprintf(EL_STATUS|EL_ANOMALY, "no track?!");
\r
243 if (Pico_mcd->TOC.Tracks[i].ftype == CT_MP3)
\r
247 lba_length = Pico_mcd->TOC.Tracks[i].Length;
\r
248 for (i++; i < Pico_mcd->TOC.Last_Track; i++) {
\r
249 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;
\r
250 lba_length += Pico_mcd->TOC.Tracks[i].Length;
\r
254 pos1024 = lba_offset * 1024 / lba_length;
\r
256 mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
\r
260 cdda_stream = Pico_mcd->TOC.Tracks[i].F;
\r
261 PicoCDBufferFlush(); // buffering relies on fp not being touched
\r
262 pm_seek(cdda_stream, lba_offset * 2352, SEEK_SET);
\r
263 if (Pico_mcd->TOC.Tracks[i].ftype == CT_WAV)
\r
265 // skip headers, assume it's 44kHz stereo uncompressed
\r
266 pm_seek(cdda_stream, 44, SEEK_CUR);
\r
271 PICO_INTERNAL void PsndClear(void)
\r
274 if (PsndLen_exc_add) len++;
\r
275 if (PicoOpt & POPT_EN_STEREO)
\r
276 memset32((int *) PsndOut, 0, len); // assume PsndOut to be aligned
\r
278 short *out = PsndOut;
\r
279 if ((long)out & 2) { *out++ = 0; len--; }
\r
280 memset32((int *) out, 0, len/2);
\r
281 if (len & 1) out[len-1] = 0;
\r
286 static int PsndRender(int offset, int length)
\r
288 int buf32_updated = 0;
\r
289 int *buf32 = PsndBuffer+offset;
\r
290 int stereo = (PicoOpt & 8) >> 3;
\r
294 pprof_start(sound);
\r
296 #if !SIMPLE_WRITE_SOUND
\r
297 if (offset == 0) { // should happen once per frame
\r
298 // compensate for float part of PsndLen
\r
299 PsndLen_exc_cnt += PsndLen_exc_add;
\r
300 if (PsndLen_exc_cnt >= 0x10000) {
\r
301 PsndLen_exc_cnt -= 0x10000;
\r
308 if (PicoOpt & POPT_EN_PSG)
\r
309 SN76496Update(PsndOut+offset, length, stereo);
\r
311 if (PicoAHW & PAHW_PICO) {
\r
312 PicoPicoPCMUpdate(PsndOut+offset, length, stereo);
\r
316 // Add in the stereo FM buffer
\r
317 if (PicoOpt & POPT_EN_FM) {
\r
318 buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);
\r
320 memset32(buf32, 0, length<<stereo);
\r
322 //printf("active_chs: %02x\n", buf32_updated);
\r
323 (void)buf32_updated;
\r
326 if (PicoAHW & PAHW_MCD) {
\r
327 pcd_pcm_update(buf32, length, stereo);
\r
328 //buf32_updated = 1;
\r
332 // CD mode, cdda enabled, not data track, CDC is reading
\r
333 if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_CDDA) &&
\r
334 !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))
\r
336 // note: only 44, 22 and 11 kHz supported, with forced stereo
\r
337 int index = Pico_mcd->scd.Cur_Track - 1;
\r
339 if (Pico_mcd->TOC.Tracks[index].ftype == CT_MP3)
\r
340 mp3_update(buf32, length, stereo);
\r
342 cdda_raw_update(buf32, length);
\r
345 if ((PicoAHW & PAHW_32X) && (PicoOpt & POPT_EN_PWM))
\r
346 p32x_pwm_update(buf32, length, stereo);
\r
348 // convert + limit to normal 16bit output
\r
349 PsndMix_32_to_16l(PsndOut+offset, buf32, length);
\r
356 // to be called on 224 or line_sample scanlines only
\r
357 PICO_INTERNAL void PsndGetSamples(int y)
\r
359 #if SIMPLE_WRITE_SOUND
\r
360 if (y != 224) return;
\r
361 PsndRender(0, PsndLen);
\r
362 if (PicoWriteSound)
\r
363 PicoWriteSound(PsndLen * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));
\r
366 static int curr_pos = 0;
\r
371 curr_pos += PsndRender(curr_pos, PsndLen-PsndLen/2);
\r
372 else curr_pos = PsndRender(0, PsndLen);
\r
375 else emustatus &= ~2;
\r
376 if (PicoWriteSound)
\r
377 PicoWriteSound(curr_pos * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));
\r
378 // clear sound buffer
\r
381 else if (emustatus & 3) {
\r
384 curr_pos = PsndRender(0, PsndLen/2);
\r
389 PICO_INTERNAL void PsndGetSamplesMS(void)
\r
391 int stereo = (PicoOpt & 8) >> 3;
\r
392 int length = PsndLen;
\r
394 #if !SIMPLE_WRITE_SOUND
\r
395 // compensate for float part of PsndLen
\r
396 PsndLen_exc_cnt += PsndLen_exc_add;
\r
397 if (PsndLen_exc_cnt >= 0x10000) {
\r
398 PsndLen_exc_cnt -= 0x10000;
\r
404 if (PicoOpt & POPT_EN_PSG)
\r
405 SN76496Update(PsndOut, length, stereo);
\r
407 // upmix to "stereo" if needed
\r
410 for (i = length, p = (void *)PsndOut; i > 0; i--, p++)
\r
414 if (PicoWriteSound != NULL)
\r
415 PicoWriteSound(length * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));
\r