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audio improvement wip

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@33 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-02-08 23:19:53 +00:00
parent f80d67e12b
commit 85f8e92973
11 changed files with 65 additions and 27 deletions
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9
Pico/sound/sound.c
View file

@ -227,6 +227,7 @@ void sound_clear(void)
int sound_render(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
@ -248,11 +249,15 @@ int sound_render(int offset, int length)
// Add in the stereo FM buffer
if (PicoOpt & 1)
YM2612UpdateOne(buf32, length, stereo, 1);
buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);
//printf("active_chs: %02x\n", buf32_updated);
// CD: PCM sound
if (do_pcm)
if (do_pcm) {
pcm_update(buf32, length, stereo);
//buf32_updated = 1;
}
// CD: CDDA audio
if ((PicoMCD & 1) && (PicoOpt & 0x800))

23
Pico/sound/ym2612.c
View file

@ -841,7 +841,7 @@ typedef struct
UINT32 eg_timer;
UINT32 eg_timer_add;
UINT32 pack; // 4c: stereo, lastchan, disabled, lfo_enabled | pan_r, pan_l, ams[2] | AMmasks[4] | FB[4] | lfo_ampm[16]
UINT32 algo; /* 50 */
UINT32 algo; /* 50: algo[3], was_update */
INT32 op1_out;
} chan_rend_context;
@ -1077,6 +1077,7 @@ static void chan_render_loop(chan_rend_context *ct, int *buffer, int length)
} else {
buffer[scounter] += smp;
}
ct->algo = 8; // algo is only used in asm, here only bit3 is used
}
/* update phase counters AFTER output calculations */
@ -1091,7 +1092,7 @@ void chan_render_loop(chan_rend_context *ct, int *buffer, unsigned short length)
#endif
static void chan_render(int *buffer, int length, FM_CH *CH, UINT32 flags) // flags: stereo, lastchan, disabled, ?, pan_r, pan_l
static int chan_render(int *buffer, int length, FM_CH *CH, UINT32 flags) // flags: stereo, lastchan, disabled, ?, pan_r, pan_l
{
chan_rend_context ct;
@ -1193,6 +1194,8 @@ static void chan_render(int *buffer, int length, FM_CH *CH, UINT32 flags) // fla
CH->SLOT[SLOT3].phase = ct.phase3;
CH->SLOT[SLOT4].phase = ct.phase4;
CH->mem_value = ct.mem;
return (ct.algo & 8) >> 3; // had output
}
/* update phase increment and envelope generator */
@ -1587,6 +1590,7 @@ INT32 *ym2612_dacout;
int YM2612UpdateOne_(int *buffer, int length, int stereo, int is_buf_empty)
{
int pan;
int active_chs = 0;
// if !is_buf_empty, it means it has valid samples to mix with, else it may contain trash
if (is_buf_empty) memset32(buffer, 0, length<<stereo);
@ -1613,14 +1617,15 @@ int YM2612UpdateOne_(int *buffer, int length, int stereo, int is_buf_empty)
if (stereo) stereo = 1;
/* mix to 32bit dest */
chan_render(buffer, length, &ym2612.CH[0], stereo|((pan&0x003)<<4)); // flags: stereo, lastchan, disabled, ?, pan_r, pan_l
chan_render(buffer, length, &ym2612.CH[1], stereo|((pan&0x00c)<<2));
chan_render(buffer, length, &ym2612.CH[2], stereo|((pan&0x030) ));
chan_render(buffer, length, &ym2612.CH[3], stereo|((pan&0x0c0)>>2));
chan_render(buffer, length, &ym2612.CH[4], stereo|((pan&0x300)>>4));
chan_render(buffer, length, &ym2612.CH[5], stereo|((pan&0xc00)>>6)|(ym2612.dacen<<2)|2);
// flags: stereo, lastchan, disabled, ?, pan_r, pan_l
active_chs |= chan_render(buffer, length, &ym2612.CH[0], stereo|((pan&0x003)<<4)) << 0;
active_chs |= chan_render(buffer, length, &ym2612.CH[1], stereo|((pan&0x00c)<<2)) << 1;
active_chs |= chan_render(buffer, length, &ym2612.CH[2], stereo|((pan&0x030) )) << 2;
active_chs |= chan_render(buffer, length, &ym2612.CH[3], stereo|((pan&0x0c0)>>2)) << 3;
active_chs |= chan_render(buffer, length, &ym2612.CH[4], stereo|((pan&0x300)>>4)) << 4;
active_chs |= chan_render(buffer, length, &ym2612.CH[5], stereo|((pan&0xc00)>>6)|(ym2612.dacen<<2)|2) << 5;
return 1; // buffer updated
return active_chs; // 1 if buffer updated
}

9
Pico/sound/ym2612.h
View file

@ -162,7 +162,7 @@ void *YM2612GetRegs(void);
#define YM2612PicoStateLoad YM2612PicoStateLoad_
#else
/* GP2X specific */
#include "../../platform/gp2x/940ctl_ym2612.h"
#include "../../platform/gp2x/940ctl.h"
extern int PicoOpt;
#define YM2612Init(baseclock,rate) { \
if (PicoOpt&0x200) YM2612Init_940(baseclock, rate); \
@ -172,10 +172,9 @@ extern int PicoOpt;
if (PicoOpt&0x200) YM2612ResetChip_940(); \
else YM2612ResetChip_(); \
}
#define YM2612UpdateOne(buffer,length,stereo,is_buf_empty) { \
if (PicoOpt&0x200) YM2612UpdateOne_940(buffer, length, stereo, is_buf_empty); \
else YM2612UpdateOne_(buffer, length, stereo, is_buf_empty); \
}
#define YM2612UpdateOne(buffer,length,stereo,is_buf_empty) \
(PicoOpt&0x200) ? YM2612UpdateOne_940(buffer, length, stereo, is_buf_empty) : \
YM2612UpdateOne_(buffer, length, stereo, is_buf_empty);
#define YM2612Write(a,v) \
(PicoOpt&0x200) ? YM2612Write_940(a, v) : YM2612Write_(a, v)
#define YM2612Read() \

6
Pico/sound/ym2612.s
View file

@ -2,6 +2,8 @@
@ it does not seem to give much performance increase (if any at all), so don't use it if it causes trouble.
@ - notaz, 2006
@ vim:filetype=armasm
.equiv SLOT1, 0
.equiv SLOT2, 2
.equiv SLOT3, 1
@ -725,7 +727,7 @@ upd_slot1:
@ lr=context, r12=pack (stereo, lastchan, disabled, lfo_enabled | pan_r, pan_l, ams[2] | AMmasks[4] | FB[4] | lfo_ampm[16])
@ r0-r2=scratch, r3=sin_tab/scratch, r4=(length<<8)|algo, r5=tl_tab/slot,
@ r0-r2=scratch, r3=sin_tab/scratch, r4=(length<<8)|unused[4],was_update,algo[3], r5=tl_tab/slot,
@ r6-r7=vol_out[4], r8=eg_timer, r9=eg_timer_add[31:16], r10=op1_out, r11=buffer
.global chan_render_loop @ chan_rend_context *ct, int *buffer, int length
@ -856,6 +858,7 @@ crl_algo_done:
@ -- WRITE SAMPLE --
tst r0, r0
beq ctl_sample_skip
orr r4, r4, #8 @ have_output
tst r12, #1
beq ctl_sample_mono
@ -908,6 +911,7 @@ crl_do_phase:
crl_loop_end:
str r8, [lr, #0x44] @ eg_timer
str r12, [lr, #0x4c] @ pack (for lfo_ampm)
str r4, [lr, #0x50] @ was_update
str r10, [lr, #0x54] @ op1_out
ldmfd sp!, {r4-r11,pc}