245 lines
9.2 KiB
C
245 lines
9.2 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||
|
|
* \/ \/ \/ \/ \/
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 Michael Sevakis (jhMikeS)
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version 2
|
||
|
|
* of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
|
* KIND, either express or implied.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
#if !SPC_NOINTERP
|
||
|
|
|
||
|
|
#define SPC_GAUSSIAN_FAST_INTERP
|
||
|
|
static inline int gaussian_fast_interp( int16_t const* samples,
|
||
|
|
int32_t position,
|
||
|
|
int16_t const* fwd,
|
||
|
|
int16_t const* rev )
|
||
|
|
{
|
||
|
|
int output;
|
||
|
|
int t0, t1, t2, t3;
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
/* NOTE: often-unaligned accesses */
|
||
|
|
"ldr %[t0], [%[samp]] \n" /* t0=i0i1 */
|
||
|
|
"ldr %[t2], [%[fwd]] \n" /* t2=f0f1 */
|
||
|
|
"ldr %[t1], [%[samp], #4] \n" /* t1=i2i3 */
|
||
|
|
"ldr %[t3], [%[rev]] \n" /* t3=r0r1 */
|
||
|
|
"smuad %[out], %[t0], %[t2] \n" /* out=f0*i0+f1*i1 */
|
||
|
|
"smladx %[out], %[t1], %[t3], %[out] \n" /* out+=r1*i2+r0*i3 */
|
||
|
|
: [out]"=r"(output),
|
||
|
|
[t0]"=&r"(t0), [t1]"=&r"(t1), [t2]"=&r"(t2), [t3]"=r"(t3)
|
||
|
|
: [fwd]"r"(fwd), [rev]"r"(rev),
|
||
|
|
[samp]"r"(samples + (position >> 12)));
|
||
|
|
|
||
|
|
return output;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPC_GAUSSIAN_FAST_AMP
|
||
|
|
static inline int gaussian_fast_amp( struct voice_t* voice, int output,
|
||
|
|
int* amp_0, int* amp_1 )
|
||
|
|
{
|
||
|
|
int t0;
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
"mov %[t0], %[out], asr #(11-5) \n" /* To do >> 16 below */
|
||
|
|
"mul %[out], %[t0], %[envx] \n"
|
||
|
|
: [out]"+r"(output), [t0]"=&r"(t0)
|
||
|
|
: [envx]"r"((int) voice->envx));
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
"smulwb %[a0], %[out], %[v0] \n" /* amp * vol >> 16 */
|
||
|
|
"smulwb %[a1], %[out], %[v1] \n"
|
||
|
|
: [a0]"=&r"(*amp_0), [a1]"=r"(*amp_1)
|
||
|
|
: [out]"r"(output),
|
||
|
|
[v0]"r"(voice->volume [0]),
|
||
|
|
[v1]"r"(voice->volume [1]));
|
||
|
|
|
||
|
|
return output >> 5; /* 'output' still 5 bits too big */
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPC_GAUSSIAN_SLOW_INTERP
|
||
|
|
static inline int gaussian_slow_interp( int16_t const* samples,
|
||
|
|
int32_t position,
|
||
|
|
int16_t const* fwd,
|
||
|
|
int16_t const* rev )
|
||
|
|
{
|
||
|
|
int output;
|
||
|
|
int t0, t1, t2, t3;
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
/* NOTE: often-unaligned accesses */
|
||
|
|
"ldr %[t0], [%[samp]] \n" /* t0=i0i1 */
|
||
|
|
"ldr %[t2], [%[fwd]] \n" /* t2=f0f1 */
|
||
|
|
"ldr %[t1], [%[samp], #4] \n" /* t1=i2i3 */
|
||
|
|
"ldr %[t3], [%[rev]] \n" /* t3=f2f3 */
|
||
|
|
"smulbb %[out], %[t0], %[t2] \n" /* out=f0*i0 */
|
||
|
|
"smultt %[t0], %[t0], %[t2] \n" /* t0=f1*i1 */
|
||
|
|
"smulbt %[t2], %[t1], %[t3] \n" /* t2=r1*i2 */
|
||
|
|
"smultb %[t3], %[t1], %[t3] \n" /* t3=r0*i3 */
|
||
|
|
: [out]"=r"(output),
|
||
|
|
[t0]"=&r"(t0), [t1]"=&r"(t1), [t2]"=&r"(t2), [t3]"=r"(t3)
|
||
|
|
: [fwd]"r"(fwd), [rev]"r"(rev),
|
||
|
|
[samp]"r"(samples + (position >> 12)));
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
"mov %[out], %[out], asr #12 \n"
|
||
|
|
"add %[t0], %[out], %[t0], asr #12 \n"
|
||
|
|
"add %[t2], %[t0], %[t2], asr #12 \n"
|
||
|
|
"pkhbt %[t0], %[t2], %[t3], asl #4 \n" /* t3[31:16], t2[15:0] */
|
||
|
|
"sadd16 %[t0], %[t0], %[t0] \n" /* t3[31:16]*2, t2[15:0]*2 */
|
||
|
|
"qsubaddx %[out], %[t0], %[t0] \n" /* out[15:0]=
|
||
|
|
* sat16(t3[31:16]+t2[15:0]) */
|
||
|
|
: [out]"+r"(output),
|
||
|
|
[t0]"+r"(t0), [t2]"+r"(t2), [t3]"+r"(t3));
|
||
|
|
|
||
|
|
/* output will be sign-extended in next step */
|
||
|
|
return output;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPC_GAUSSIAN_SLOW_AMP
|
||
|
|
static inline int gaussian_slow_amp( struct voice_t* voice, int output,
|
||
|
|
int* amp_0, int* amp_1 )
|
||
|
|
{
|
||
|
|
asm volatile (
|
||
|
|
"smulbb %[out], %[out], %[envx]"
|
||
|
|
: [out]"+r"(output)
|
||
|
|
: [envx]"r"(voice->envx));
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
"mov %[out], %[out], asr #11 \n"
|
||
|
|
"bic %[out], %[out], #0x1 \n"
|
||
|
|
"smulbb %[amp_0], %[out], %[v0] \n"
|
||
|
|
"smulbb %[amp_1], %[out], %[v1] \n"
|
||
|
|
: [out]"+r"(output),
|
||
|
|
[amp_0]"=&r"(*amp_0), [amp_1]"=r"(*amp_1)
|
||
|
|
: [v0]"r"(voice->volume[0]), [v1]"r"(voice->volume[1]));
|
||
|
|
|
||
|
|
return output;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !SPC_NOINTERP */
|
||
|
|
|
||
|
|
#if !SPC_NOECHO
|
||
|
|
|
||
|
|
#define SPC_DSP_ECHO_APPLY
|
||
|
|
|
||
|
|
/* Echo filter history */
|
||
|
|
static int32_t fir_buf[FIR_BUF_CNT] IBSS_ATTR_SPC
|
||
|
|
__attribute__(( aligned(FIR_BUF_ALIGN*1) ));
|
||
|
|
|
||
|
|
static inline void echo_init( struct Spc_Dsp* this )
|
||
|
|
{
|
||
|
|
this->fir.ptr = fir_buf;
|
||
|
|
ci->memset( fir_buf, 0, sizeof fir_buf );
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void echo_apply(struct Spc_Dsp* this,
|
||
|
|
uint8_t* const echo_ptr, int* out_0, int* out_1)
|
||
|
|
{
|
||
|
|
/* Keep last 8 samples */
|
||
|
|
int32_t* fir_ptr;
|
||
|
|
int t0;
|
||
|
|
asm volatile (
|
||
|
|
"ldr %[t0], [%[ep]] \n"
|
||
|
|
"add %[p], %[t_p], #4 \n"
|
||
|
|
"bic %[t_p], %[p], %[mask] \n"
|
||
|
|
"str %[t0], [%[p], #-4] \n"
|
||
|
|
/* duplicate at +8 eliminates wrap checking below */
|
||
|
|
"str %[t0], [%[p], #28] \n"
|
||
|
|
: [p]"=&r"(fir_ptr), [t_p]"+r"(this->fir.ptr),
|
||
|
|
[t0]"=&r"(t0)
|
||
|
|
: [ep]"r"(echo_ptr), [mask]"i"(~FIR_BUF_MASK));
|
||
|
|
|
||
|
|
int32_t* fir_coeff = (int32_t *)this->fir.coeff;
|
||
|
|
|
||
|
|
asm volatile ( /* L0R0 = acc0 */
|
||
|
|
"ldmia %[p]!, { r2-r5 } \n" /* L1R1-L4R4 = r2-r5 */
|
||
|
|
"ldmia %[c]!, { r0-r1 } \n" /* C0C1-C2C3 = r0-r1 */
|
||
|
|
"pkhbt %[acc0], %[t0], r2, asl #16 \n" /* L0R0,L1R1->L0L1,R0R1 */
|
||
|
|
"pkhtb r2, r2, %[t0], asr #16 \n"
|
||
|
|
"smuad %[acc0], %[acc0], r0 \n" /* acc0=L0*C0+L1*C1 */
|
||
|
|
"smuad %[acc1], r2, r0 \n" /* acc1=R0*C0+R1*C1 */
|
||
|
|
"pkhbt %[t0], r3, r4, asl #16 \n" /* L2R2,L3R3->L2L3,R2R3 */
|
||
|
|
"pkhtb r4, r4, r3, asr #16 \n"
|
||
|
|
"smlad %[acc0], %[t0], r1, %[acc0] \n" /* acc0+=L2*C2+L3*C3 */
|
||
|
|
"smlad %[acc1], r4, r1, %[acc1] \n" /* acc1+=R2*C2+R3*C3 */
|
||
|
|
"ldmia %[p], { r2-r4 } \n" /* L5R5-L7R7 = r2-r4 */
|
||
|
|
"ldmia %[c], { r0-r1 } \n" /* C4C5-C6C7 = r0-r1 */
|
||
|
|
"pkhbt %[t0], r5, r2, asl #16 \n" /* L4R4,L5R5->L4L5,R4R5 */
|
||
|
|
"pkhtb r2, r2, r5, asr #16 \n"
|
||
|
|
"smlad %[acc0], %[t0], r0, %[acc0] \n" /* acc0+=L4*C4+L5*C5 */
|
||
|
|
"smlad %[acc1], r2, r0, %[acc1] \n" /* acc1+=R4*C4+R5*C5 */
|
||
|
|
"pkhbt %[t0], r3, r4, asl #16 \n" /* L6R6,L7R7->L6L7,R6R7 */
|
||
|
|
"pkhtb r4, r4, r3, asr #16 \n"
|
||
|
|
"smlad %[acc0], %[t0], r1, %[acc0] \n" /* acc0+=L6*C6+L7*C7 */
|
||
|
|
"smlad %[acc1], r4, r1, %[acc1] \n" /* acc1+=R6*C6+R7*C7 */
|
||
|
|
: [t0]"+r"(t0), [acc0]"=&r"(*out_0), [acc1]"=&r"(*out_1),
|
||
|
|
[p]"+r"(fir_ptr), [c]"+r"(fir_coeff)
|
||
|
|
:
|
||
|
|
: "r0", "r1", "r2", "r3", "r4", "r5");
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPC_DSP_ECHO_FEEDBACK
|
||
|
|
static inline void echo_feedback(struct Spc_Dsp* this, uint8_t* echo_ptr,
|
||
|
|
int echo_0, int echo_1, int fb_0, int fb_1)
|
||
|
|
{
|
||
|
|
int e0, e1;
|
||
|
|
asm volatile (
|
||
|
|
"mov %[e0], %[ei0], asl #7 \n"
|
||
|
|
"mov %[e1], %[ei1], asl #7 \n"
|
||
|
|
"mla %[e0], %[fb0], %[ef], %[e0] \n"
|
||
|
|
"mla %[e1], %[fb1], %[ef], %[e1] \n"
|
||
|
|
: [e0]"=&r"(e0), [e1]"=&r"(e1)
|
||
|
|
: [ei0]"r"(echo_0), [ei1]"r"(echo_1),
|
||
|
|
[fb0]"r"(fb_0), [fb1]"r"(fb_1),
|
||
|
|
[ef]"r"((int)this->r.g.echo_feedback));
|
||
|
|
asm volatile (
|
||
|
|
"ssat %[e0], #16, %[e0], asr #14 \n"
|
||
|
|
"ssat %[e1], #16, %[e1], asr #14 \n"
|
||
|
|
"pkhbt %[e0], %[e0], %[e1], lsl #16 \n"
|
||
|
|
"str %[e0], [%[ep]] \n"
|
||
|
|
: [e0]"+r"(e0), [e1]"+r"(e1)
|
||
|
|
: [ep]"r"((int32_t *)echo_ptr));
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPC_DSP_GENERATE_OUTPUT
|
||
|
|
static inline void echo_output( struct Spc_Dsp* this, int global_muting,
|
||
|
|
int global_vol_0, int global_vol_1, int chans_0, int chans_1,
|
||
|
|
int fb_0, int fb_1, int* out_0, int* out_1 )
|
||
|
|
{
|
||
|
|
int t0, t1;
|
||
|
|
|
||
|
|
asm volatile (
|
||
|
|
"mul %[t0], %[gv0], %[ch0] \n"
|
||
|
|
"mul %[t1], %[gv1], %[ch1] \n"
|
||
|
|
: [t0]"=&r"(t0), [t1]"=r"(t1)
|
||
|
|
: [gv0]"r"(global_vol_0), [gv1]"r"(global_vol_1),
|
||
|
|
[ch0]"r"(chans_0), [ch1]"r"(chans_1));
|
||
|
|
asm volatile (
|
||
|
|
"mla %[t0], %[i0], %[ev0], %[t0] \n"
|
||
|
|
"mla %[t1], %[i1], %[ev1], %[t1] \n"
|
||
|
|
: [t0]"+r"(t0), [t1]"+r"(t1)
|
||
|
|
: [i0]"r"(fb_0), [i1]"r"(fb_1),
|
||
|
|
[ev0]"r"((int)this->r.g.echo_volume_0),
|
||
|
|
[ev1]"r"((int)this->r.g.echo_volume_1));
|
||
|
|
asm volatile (
|
||
|
|
"mov %[o0], %[t0], asr %[gm] \n"
|
||
|
|
"mov %[o1], %[t1], asr %[gm] \n"
|
||
|
|
: [o0]"=&r"(*out_0), [o1]"=r"(*out_1)
|
||
|
|
: [t0]"r"(t0), [t1]"r"(t1),
|
||
|
|
[gm]"r"(global_muting));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* SPC_NOECHO */
|