mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
cd: rewrite pcm
This commit is contained in:
notaz
parent
d0132772f7
commit
33be04ca5f
7 changed files with 171 additions and 160 deletions
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@ -318,6 +318,10 @@ void pcd_state_loaded(void)
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pcd_state_loaded_mem();
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memset(Pico_mcd->pcm_mixbuf, 0, sizeof(Pico_mcd->pcm_mixbuf));
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Pico_mcd->pcm_mixbuf_dirty = 0;
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Pico_mcd->pcm_mixpos = 0;
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// old savestates..
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cycles = pcd_cycles_m68k_to_s68k(SekCycleAim);
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diff = cycles - SekCycleAimS68k;
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@ -340,6 +344,8 @@ void pcd_state_loaded(void)
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if (Pico_mcd->scd.Status_CDC & 0x08)
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Update_CDC_TRansfer(Pico_mcd->s68k_regs[4] & 7);
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}
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if (Pico_mcd->pcm.update_cycles == 0)
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Pico_mcd->pcm.update_cycles = cycles;
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}
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// vim:shiftwidth=2:ts=2:expandtab
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@ -10,7 +10,6 @@
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#include "../memory.h"
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#include "gfx_cd.h"
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#include "pcm.h"
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uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
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uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
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@ -834,13 +833,10 @@ regs_done:
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a &= 0x7fff;
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if (a >= 0x2000)
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d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
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else if (a >= 0x20) {
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a &= 0x1e;
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d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;
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if (a & 2)
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d >>= 8;
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}
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return d & 0xff;
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else if (a >= 0x20)
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d = pcd_pcm_read(a >> 1);
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return d;
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}
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return s68k_unmapped_read8(a);
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@ -864,16 +860,12 @@ static u32 PicoReadS68k16_pr(u32 a)
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// PCM
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if ((a & 0x8000) == 0x0000) {
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//elprintf(EL_ANOMALY, "FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);
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a &= 0x7fff;
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if (a >= 0x2000)
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d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];
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else if (a >= 0x20) {
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a &= 0x1e;
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d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;
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if (a & 2) d >>= 8;
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}
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elprintf(EL_CDREGS, "ret = %04x", d);
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d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
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else if (a >= 0x20)
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d = pcd_pcm_read(a >> 1);
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return d;
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}
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@ -898,7 +890,7 @@ static void PicoWriteS68k8_pr(u32 a, u32 d)
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if (a >= 0x2000)
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Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
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else if (a < 0x12)
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pcm_write(a>>1, d);
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pcd_pcm_write(a>>1, d);
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return;
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}
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@ -932,7 +924,7 @@ static void PicoWriteS68k16_pr(u32 a, u32 d)
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if (a >= 0x2000)
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Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
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else if (a < 0x12)
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pcm_write(a>>1, d & 0xff);
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pcd_pcm_write(a>>1, d & 0xff);
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return;
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}
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@ -56,6 +56,8 @@
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.extern s68k_poll_detect
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.extern gfx_cd_read
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.extern gfx_cd_write16
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.extern pcd_pcm_write
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.extern pcd_pcm_read
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.extern PicoCpuCS68k
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.extern PicoRead8_io
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.extern PicoRead16_io
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@ -447,23 +449,15 @@ m_s68k_read8_pcm:
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@ must not trash r3 and r12
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ldr r1, =(Pico+0x22200)
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bic r0, r0, #0xff0000
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@ bic r0, r0, #0x008000
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ldr r1, [r1]
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mov r2, #0x110000
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orr r2, r2, #0x002200
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cmp r0, #0x2000
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bge m_s68k_read8_pcm_ram
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cmp r0, #0x20
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movlt r0, #0
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bxlt lr
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orr r2, r2, #(0x48+8) @ pcm.ch + addr_offset
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add r1, r1, r2
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and r2, r0, #0x1c
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ldr r1, [r1, r2, lsl #2]
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tst r0, #2
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moveq r0, r1, lsr #PCM_STEP_SHIFT
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movne r0, r1, lsr #(PCM_STEP_SHIFT+8)
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and r0, r0, #0xff
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movge r0, r0, lsr #1
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bge pcd_pcm_read
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mov r0, #0
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bx lr
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m_s68k_read8_pcm_ram:
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@ -600,7 +594,7 @@ m_s68k_write8_pcm:
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bic r0, r0, #0xff0000
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cmp r0, #0x12
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movlt r0, r0, lsr #1
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blt pcm_write
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blt pcd_pcm_write
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cmp r0, #0x2000
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bxlt lr
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215
pico/cd/pcm.c
215
pico/cd/pcm.c
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@ -1,19 +1,21 @@
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/*
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* Emulation routines for the RF5C164 PCM chip
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* (C) notaz, 2007
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* (C) notaz, 2007, 2013
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*
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* This work is licensed under the terms of MAME license.
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* See COPYING file in the top-level directory.
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*/
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#include <assert.h>
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#include "../pico_int.h"
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#include "pcm.h"
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static unsigned int g_rate = 0; // 18.14 fixed point
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#define PCM_STEP_SHIFT 11
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PICO_INTERNAL_ASM void pcm_write(unsigned int a, unsigned int d)
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void pcd_pcm_write(unsigned int a, unsigned int d)
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{
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//printf("pcm_write(%i, %02x)\n", a, d);
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unsigned int cycles = SekCyclesDoneS68k();
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if ((int)(cycles - Pico_mcd->pcm.update_cycles) >= 384)
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pcd_pcm_sync(cycles);
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if (a < 7)
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{
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@ -21,82 +23,78 @@ PICO_INTERNAL_ASM void pcm_write(unsigned int a, unsigned int d)
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}
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else if (a == 7) // control register
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{
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if (d & 0x40) Pico_mcd->pcm.cur_ch = d & 7;
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else Pico_mcd->pcm.bank = d & 0xf;
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if (d & 0x40)
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Pico_mcd->pcm.cur_ch = d & 7;
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else
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Pico_mcd->pcm.bank = d & 0xf;
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Pico_mcd->pcm.control = d;
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// dprintf("pcm control=%02x", Pico_mcd->pcm.control);
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elprintf(EL_CD, "pcm control %02x", Pico_mcd->pcm.control);
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}
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else if (a == 8) // sound on/off
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else if (a == 8 && Pico_mcd->pcm.enabled != (u_char)~d)
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{
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if (!(Pico_mcd->pcm.enabled & 0x01)) Pico_mcd->pcm.ch[0].addr =
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Pico_mcd->pcm.ch[0].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x02)) Pico_mcd->pcm.ch[1].addr =
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Pico_mcd->pcm.ch[1].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x04)) Pico_mcd->pcm.ch[2].addr =
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Pico_mcd->pcm.ch[2].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x08)) Pico_mcd->pcm.ch[3].addr =
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Pico_mcd->pcm.ch[3].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x10)) Pico_mcd->pcm.ch[4].addr =
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Pico_mcd->pcm.ch[4].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x20)) Pico_mcd->pcm.ch[5].addr =
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Pico_mcd->pcm.ch[5].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x40)) Pico_mcd->pcm.ch[6].addr =
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Pico_mcd->pcm.ch[6].regs[6] << (PCM_STEP_SHIFT + 8);
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if (!(Pico_mcd->pcm.enabled & 0x80)) Pico_mcd->pcm.ch[7].addr =
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Pico_mcd->pcm.ch[7].regs[6] << (PCM_STEP_SHIFT + 8);
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// printf("addr %x %x %x %x %x %x %x %x\n", Pico_mcd->pcm.ch[0].addr, Pico_mcd->pcm.ch[1].addr
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// , Pico_mcd->pcm.ch[2].addr, Pico_mcd->pcm.ch[3].addr, Pico_mcd->pcm.ch[4].addr, Pico_mcd->pcm.ch[5].addr
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// , Pico_mcd->pcm.ch[6].addr, Pico_mcd->pcm.ch[7].addr);
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Pico_mcd->pcm.enabled = ~d;
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//printf("enabled=%02x\n", Pico_mcd->pcm.enabled);
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}
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}
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PICO_INTERNAL void pcm_set_rate(int rate)
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{
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float step = 31.8 * 1024.0 / (float) rate; // max <4 @ 8000Hz
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step *= 256*256/4;
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g_rate = (unsigned int) step;
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if (step - (float) g_rate >= 0.5) g_rate++;
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elprintf(EL_STATUS, "g_rate: %f %08x\n", (double)step, g_rate);
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}
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PICO_INTERNAL void pcm_update(int *buffer, int length, int stereo)
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{
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struct pcm_chan *ch;
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unsigned int step, addr;
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int mul_l, mul_r, smp;
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int i, j, k;
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int *out;
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// PCM disabled or all channels off (to be checked by caller)
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//if (!(Pico_mcd->pcm.control & 0x80) || !Pico_mcd->pcm.enabled) return;
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//printf("-- upd %i\n", length);
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// sound on/off
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int was_enabled = Pico_mcd->pcm.enabled;
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int i;
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for (i = 0; i < 8; i++)
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if (!(was_enabled & (1 << i)))
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Pico_mcd->pcm.ch[i].addr =
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Pico_mcd->pcm.ch[i].regs[6] << (PCM_STEP_SHIFT + 8);
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Pico_mcd->pcm.enabled = ~d;
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}
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}
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unsigned int pcd_pcm_read(unsigned int a)
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{
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unsigned int d, cycles = SekCyclesDoneS68k();
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if ((int)(cycles - Pico_mcd->pcm.update_cycles) >= 384)
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pcd_pcm_sync(cycles);
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d = Pico_mcd->pcm.ch[(a >> 1) & 7].addr >> PCM_STEP_SHIFT;
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if (a & 1)
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d >>= 8;
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return d & 0xff;
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}
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void pcd_pcm_sync(unsigned int to)
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{
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unsigned int cycles = Pico_mcd->pcm.update_cycles;
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int mul_l, mul_r, inc, smp;
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struct pcm_chan *ch;
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unsigned int addr;
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int c, s, steps;
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int *out;
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if ((int)(to - cycles) < 384)
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return;
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steps = (to - cycles) / 384;
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// PCM disabled or all channels off
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if (!(Pico_mcd->pcm.control & 0x80) || !Pico_mcd->pcm.enabled)
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goto end;
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out = Pico_mcd->pcm_mixbuf + Pico_mcd->pcm_mixpos * 2;
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Pico_mcd->pcm_mixbuf_dirty = 1;
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if (Pico_mcd->pcm_mixpos + steps > PCM_MIXBUF_LEN)
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// shouldn't happen
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steps = PCM_MIXBUF_LEN - Pico_mcd->pcm_mixpos;
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for (c = 0; c < 8; c++)
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{
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if (!(Pico_mcd->pcm.enabled & (1 << i))) continue; // channel disabled
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if (!(Pico_mcd->pcm.enabled & (1 << c)))
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continue; // channel disabled
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out = buffer;
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ch = &Pico_mcd->pcm.ch[i];
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addr = ch->addr; // >> PCM_STEP_SHIFT;
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mul_l = ((int)ch->regs[0] * (ch->regs[1] & 0xf)) >> (5+1); // (env * pan) >> 5
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ch = &Pico_mcd->pcm.ch[c];
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addr = ch->addr;
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inc = *(unsigned short *)&ch->regs[2];
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mul_l = ((int)ch->regs[0] * (ch->regs[1] & 0xf)) >> (5+1);
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mul_r = ((int)ch->regs[0] * (ch->regs[1] >> 4)) >> (5+1);
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step = ((unsigned int)(*(unsigned short *)&ch->regs[2]) * g_rate) >> 14; // freq step
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// fprintf(stderr, "step=%i, cstep=%i, mul_l=%i, mul_r=%i, ch=%i, addr=%x, en=%02x\n",
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// *(unsigned short *)&ch->regs[2], step, mul_l, mul_r, i, addr, Pico_mcd->pcm.enabled);
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if (!stereo && mul_l < mul_r) mul_l = mul_r;
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for (j = 0; j < length; j++)
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for (s = 0; s < steps; s++, addr = (addr + inc) & 0x7FFFFFF)
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{
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// printf("addr=%08x\n", addr);
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smp = Pico_mcd->pcm_ram[addr >> PCM_STEP_SHIFT];
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// test for loop signal
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@ -105,33 +103,64 @@ PICO_INTERNAL void pcm_update(int *buffer, int length, int stereo)
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addr = *(unsigned short *)&ch->regs[4]; // loop_addr
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smp = Pico_mcd->pcm_ram[addr];
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addr <<= PCM_STEP_SHIFT;
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if (smp == 0xff) break;
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}
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if (smp & 0x80) smp = -(smp & 0x7f);
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*out++ += smp * mul_l; // max 128 * 119 = 15232
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if(stereo)
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*out++ += smp * mul_r;
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// update address register
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k = (addr >> PCM_STEP_SHIFT) + 1;
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addr = (addr + step) & 0x7FFFFFF;
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for(; k < (addr >> PCM_STEP_SHIFT); k++)
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{
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if (Pico_mcd->pcm_ram[k] == 0xff)
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{
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addr = (unsigned int)(*(unsigned short *)&ch->regs[4]) << PCM_STEP_SHIFT; // loop_addr
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if (smp == 0xff)
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break;
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}
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}
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}
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if (Pico_mcd->pcm_ram[addr >> PCM_STEP_SHIFT] == 0xff)
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addr = (unsigned int)(*(unsigned short *)&ch->regs[4]) << PCM_STEP_SHIFT; // loop_addr
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if (smp & 0x80)
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smp = -(smp & 0x7f);
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out[s*2 ] += smp * mul_l; // max 128 * 119 = 15232
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out[s*2+1] += smp * mul_r;
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}
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ch->addr = addr;
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}
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end:
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Pico_mcd->pcm.update_cycles = cycles + steps * 384;
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Pico_mcd->pcm_mixpos += steps;
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}
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void pcd_pcm_update(int *buf32, int length, int stereo)
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{
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int step, *pcm;
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int p = 0;
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pcd_pcm_sync(SekCyclesDoneS68k());
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if (!Pico_mcd->pcm_mixbuf_dirty || !(PicoOpt & POPT_EN_MCD_PCM))
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goto out;
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step = (Pico_mcd->pcm_mixpos << 16) / length;
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pcm = Pico_mcd->pcm_mixbuf;
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if (stereo) {
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while (length-- > 0) {
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*buf32++ += pcm[0];
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*buf32++ += pcm[1];
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p += step;
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pcm += (p >> 16) * 2;
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p &= 0xffff;
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}
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}
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else {
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while (length-- > 0) {
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// mostly unused
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*buf32++ += pcm[0];
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p += step;
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pcm += (p >> 16) * 2;
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p &= 0xffff;
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}
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}
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memset(Pico_mcd->pcm_mixbuf, 0,
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Pico_mcd->pcm_mixpos * 2 * sizeof(Pico_mcd->pcm_mixbuf[0]));
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out:
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Pico_mcd->pcm_mixbuf_dirty = 0;
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Pico_mcd->pcm_mixpos = 0;
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}
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// vim:shiftwidth=2:ts=2:expandtab
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@ -1,7 +0,0 @@
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#define PCM_STEP_SHIFT 11
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PICO_INTERNAL_ASM void pcm_write(unsigned int a, unsigned int d);
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PICO_INTERNAL void pcm_set_rate(int rate);
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PICO_INTERNAL void pcm_update(int *buffer, int length, int stereo);
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@ -378,13 +378,15 @@ struct PicoSRAM
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#include "cd/LC89510.h"
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#include "cd/gfx_cd.h"
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#define PCM_MIXBUF_LEN ((12500000 / 384) / 50 + 1)
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|
||||
struct mcd_pcm
|
||||
{
|
||||
unsigned char control; // reg7
|
||||
unsigned char enabled; // reg8
|
||||
unsigned char cur_ch;
|
||||
unsigned char bank;
|
||||
int pad1;
|
||||
unsigned int update_cycles;
|
||||
|
||||
struct pcm_chan // 08, size 0x10
|
||||
{
|
||||
|
|
@ -445,6 +447,9 @@ typedef struct
|
|||
CDC cdc;
|
||||
_scd scd;
|
||||
Rot_Comp rot_comp;
|
||||
int pcm_mixbuf[PCM_MIXBUF_LEN * 2];
|
||||
int pcm_mixpos;
|
||||
int pcm_mixbuf_dirty;
|
||||
} mcd_state;
|
||||
|
||||
// XXX: this will need to be reworked for cart+cd support.
|
||||
|
|
@ -656,6 +661,12 @@ void pcd_run_cpus(int m68k_cycles);
|
|||
void pcd_soft_reset(void);
|
||||
void pcd_state_loaded(void);
|
||||
|
||||
// cd/pcm.c
|
||||
void pcd_pcm_sync(unsigned int to);
|
||||
void pcd_pcm_update(int *buffer, int length, int stereo);
|
||||
void pcd_pcm_write(unsigned int a, unsigned int d);
|
||||
unsigned int pcd_pcm_read(unsigned int a);
|
||||
|
||||
// pico/pico.c
|
||||
PICO_INTERNAL void PicoInitPico(void);
|
||||
PICO_INTERNAL void PicoReratePico(void);
|
||||
|
|
|
|||
|
|
@ -11,7 +11,6 @@
|
|||
#include "ym2612.h"
|
||||
#include "sn76496.h"
|
||||
#include "../pico_int.h"
|
||||
#include "../cd/pcm.h"
|
||||
#include "../cd/cue.h"
|
||||
#include "mix.h"
|
||||
|
||||
|
|
@ -161,9 +160,6 @@ void PsndRerate(int preserve_state)
|
|||
// recalculate dac info
|
||||
dac_recalculate();
|
||||
|
||||
if (PicoAHW & PAHW_MCD)
|
||||
pcm_set_rate(PsndRate);
|
||||
|
||||
// clear all buffers
|
||||
memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);
|
||||
memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));
|
||||
|
|
@ -201,14 +197,6 @@ PICO_INTERNAL void PsndDoDAC(int line_to)
|
|||
short *d = PsndOut + pos;
|
||||
for (; len > 0; len--, d++) *d = dout;
|
||||
}
|
||||
|
||||
#if 0
|
||||
if (do_pcm) {
|
||||
int *d = PsndBuffer;
|
||||
d += (PicoOpt&8) ? pos*2 : pos;
|
||||
pcm_update(d, len, 1);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
// cdda
|
||||
|
|
@ -309,9 +297,7 @@ static int PsndRender(int offset, int length)
|
|||
int buf32_updated = 0;
|
||||
int *buf32 = PsndBuffer+offset;
|
||||
int stereo = (PicoOpt & 8) >> 3;
|
||||
// emulating CD && PCM option enabled && PCM chip on && have enabled channels
|
||||
int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&
|
||||
(Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;
|
||||
|
||||
offset <<= stereo;
|
||||
|
||||
pprof_start(sound);
|
||||
|
|
@ -346,8 +332,8 @@ static int PsndRender(int offset, int length)
|
|||
(void)buf32_updated;
|
||||
|
||||
// CD: PCM sound
|
||||
if (do_pcm) {
|
||||
pcm_update(buf32, length, stereo);
|
||||
if (PicoAHW & PAHW_MCD) {
|
||||
pcd_pcm_update(buf32, length, stereo);
|
||||
//buf32_updated = 1;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue