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Deactivated Lowpass and DC filters to fix audio level issue

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root
2021-05-22 17:25:00 +02:00
parent e9b9b9d81f
commit 45e3128e13
1 changed files with 50 additions and 50 deletions
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100
pico/sound/mix_arm.S
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@@ -177,21 +177,21 @@ m16_32_s2_no_unal2:
@ filter out DC offset
@ in=int_sample (max 20 bit), y=filter memory, r8=tmp
.macro DCfilt in y
rsb r8, \y, \in, lsl #12 @ fixpoint 20.12
add \y, \y, r8, asr #12 @ alpha = 1-1/4094
sub \in, \in, \y, asr #12
.endm
@.macro DCfilt in y
@ rsb r8, \y, \in, lsl #12 @ fixpoint 20.12
@ add \y, \y, r8, asr #12 @ alpha = 1-1/4094
@ sub \in, \in, \y, asr #12
@.endm
@ lowpass filter
@ in=int_sample (max 20 bit), y=filter memory, r12=alpha(Q8), r8=tmp
.macro LPfilt in y
@.macro LPfilt in y
@ asr r8, \y, #8
@ rsb r8, r8, \in, lsl #4 @ fixpoint 20.12
sub r8, \in, \y, asr #12 @ fixpoint 20.12
mla \y, r8, r12, \y
asr \in, \y, #12
.endm
@ sub r8, \in, \y, asr #12 @ fixpoint 20.12
@ mla \y, r8, r12, \y
@ asr \in, \y, #12
@.endm
@ mix 32bit audio (with 16bits really used, upper bits indicate overflow) with normal 16 bit audio with left channel only
@@ -220,14 +220,14 @@ m32_16l_st_loop:
add r6, r6, r12,asr #16
add r7, r7, r12,asr #16
ldr r12,[sp]
LPfilt r4, r3
LPfilt r5, lr
LPfilt r6, r3
LPfilt r7, lr
DCfilt r4, r10
DCfilt r5, r11
DCfilt r6, r10
DCfilt r7, r11
@ LPfilt r4, r3
@ LPfilt r5, lr
@ LPfilt r6, r3
@ LPfilt r7, lr
@ DCfilt r4, r10
@ DCfilt r5, r11
@ DCfilt r6, r10
@ DCfilt r7, r11
mov r12,#1
Limitsh r4
Limitsh r5
@@ -248,10 +248,10 @@ m32_16l_st_end:
add r4, r4, r6
add r5, r5, r6
ldr r12,[sp]
LPfilt r4, r3
LPfilt r5, lr
DCfilt r4, r10
DCfilt r5, r11
@ LPfilt r4, r3
@ LPfilt r5, lr
@ DCfilt r4, r10
@ DCfilt r5, r11
mov r12,#1
Limitsh r4
Limitsh r5
@@ -286,8 +286,8 @@ mix_32_to_16_mono:
sub r2, r2, #1
add r4, r4, r5
ldr r12,[sp]
LPfilt r4, r11
DCfilt r4, r10
@ LPfilt r4, r11
@ DCfilt r4, r10
mov r12,#1
Limit r4
strh r4, [r0], #2
@@ -306,14 +306,14 @@ m32_16_mo_loop:
mov r12,r12,lsl #16
add r6, r6, r12,asr #16
ldr r12,[sp]
LPfilt r4, r11
LPfilt r5, r11
LPfilt r6, r11
LPfilt r7, r11
DCfilt r4, r10
DCfilt r5, r10
DCfilt r6, r10
DCfilt r7, r10
@ LPfilt r4, r11
@ LPfilt r5, r11
@ LPfilt r6, r11
@ LPfilt r7, r11
@ DCfilt r4, r10
@ DCfilt r5, r10
@ DCfilt r6, r10
@ DCfilt r7, r10
mov r12,#1
Limitsh r4
Limitsh r5
@@ -335,10 +335,10 @@ m32_16_mo_end:
mov r6, r6, lsl #16
add r4, r4, r6, asr #16
ldr r12,[sp]
LPfilt r4, r11
LPfilt r5, r11
DCfilt r4, r10
DCfilt r5, r10
@ LPfilt r4, r11
@ LPfilt r5, r11
@ DCfilt r4, r10
@ DCfilt r5, r10
mov r12,#1
Limitsh r4
Limitsh r5
@@ -352,8 +352,8 @@ m32_16_mo_no_unal2:
ldr r4, [r1], #4
add r4, r4, r5
ldr r12,[sp]
LPfilt r4, r11
DCfilt r4, r10
@ LPfilt r4, r11
@ DCfilt r4, r10
mov r12,#1
Limit r4
strh r4, [r0], #2
@@ -411,14 +411,14 @@ m32_16l_st_l_loop:
mov r6, r6, asr r9
mov r7, r7, asr r9
ldr r12,[sp]
LPfilt r4, r3
LPfilt r5, lr
LPfilt r6, r3
LPfilt r7, lr
DCfilt r4, r10
DCfilt r5, r11
DCfilt r6, r10
DCfilt r7, r11
@ LPfilt r4, r3
@ LPfilt r5, lr
@ LPfilt r6, r3
@ LPfilt r7, lr
@ DCfilt r4, r10
@ DCfilt r5, r11
@ DCfilt r6, r10
@ DCfilt r7, r11
mov r12,#1
Limitsh r4
Limitsh r5
@@ -441,10 +441,10 @@ m32_16l_st_l_end:
mov r4, r4, asr r9
mov r5, r5, asr r9
ldr r12,[sp]
LPfilt r4, r3
LPfilt r5, lr
DCfilt r4, r10
DCfilt r5, r11
@ LPfilt r4, r3
@ LPfilt r5, lr
@ DCfilt r4, r10
@ DCfilt r5, r11
mov r12,#1
Limitsh r4
Limitsh r5