mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
221 lines
7.6 KiB
ArmAsm
221 lines
7.6 KiB
ArmAsm
/**
|
|
* Copyright (C) 2010 Mans Rullgard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "asm.S"
|
|
|
|
.syntax unified
|
|
|
|
.macro rac_get_prob h, bs, buf, cw, pr, t0, t1
|
|
adds \bs, \bs, \t0
|
|
lsl \cw, \cw, \t0
|
|
lsl \t0, \h, \t0
|
|
rsb \h, \pr, #256
|
|
ldrhcs \t1, [\buf], #2
|
|
smlabb \h, \t0, \pr, \h
|
|
rev16cs \t1, \t1
|
|
orrcs \cw, \cw, \t1, lsl \bs
|
|
subcs \bs, \bs, #16
|
|
lsr \h, \h, #8
|
|
cmp \cw, \h, lsl #16
|
|
subge \cw, \cw, \h, lsl #16
|
|
subge \h, \t0, \h
|
|
.endm
|
|
|
|
.macro rac_get_128 h, bs, buf, cw, t0, t1
|
|
adds \bs, \bs, \t0
|
|
lsl \cw, \cw, \t0
|
|
lsl \t0, \h, \t0
|
|
ldrhcs \t1, [\buf], #2
|
|
mov \h, #128
|
|
rev16cs \t1, \t1
|
|
add \h, \h, \t0, lsl #7
|
|
orrcs \cw, \cw, \t1, lsl \bs
|
|
subcs \bs, \bs, #16
|
|
lsr \h, \h, #8
|
|
cmp \cw, \h, lsl #16
|
|
subge \cw, \cw, \h, lsl #16
|
|
subge \h, \t0, \h
|
|
.endm
|
|
|
|
function ff_decode_block_coeffs_armv6, export=1
|
|
push {r0,r1,r4-r11,lr}
|
|
movrel lr, X(ff_vp56_norm_shift)
|
|
ldrd r4, r5, [sp, #44] @ token_prob, qmul
|
|
cmp r3, #0
|
|
ldr r11, [r5]
|
|
ldm r0, {r5-r7} @ high, bits, buf
|
|
pkhtbne r11, r11, r11, asr #16
|
|
ldr r8, [r0, #16] @ code_word
|
|
0:
|
|
ldrb r9, [lr, r5]
|
|
add r3, r3, #1
|
|
ldrb r0, [r4, #1]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
blt 2f
|
|
|
|
ldrb r9, [lr, r5]
|
|
ldrb r0, [r4, #2]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
ldrb r9, [lr, r5]
|
|
bge 3f
|
|
|
|
add r4, r3, r3, lsl #5
|
|
sxth r12, r11
|
|
add r4, r2, r4
|
|
adds r6, r6, r9
|
|
add r4, r4, #11
|
|
lsl r8, r8, r9
|
|
ldrhcs r10, [r7], #2
|
|
lsl r9, r5, r9
|
|
mov r5, #128
|
|
rev16cs r10, r10
|
|
add r5, r5, r9, lsl #7
|
|
orrcs r8, r8, r10, lsl r6
|
|
subcs r6, r6, #16
|
|
lsr r5, r5, #8
|
|
cmp r8, r5, lsl #16
|
|
movrel r10, zigzag_scan-1
|
|
subge r8, r8, r5, lsl #16
|
|
subge r5, r9, r5
|
|
ldrb r10, [r10, r3]
|
|
rsbge r12, r12, #0
|
|
cmp r3, #16
|
|
strh r12, [r1, r10]
|
|
bge 6f
|
|
5:
|
|
ldrb r9, [lr, r5]
|
|
ldrb r0, [r4]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
pkhtb r11, r11, r11, asr #16
|
|
bge 0b
|
|
|
|
6:
|
|
ldr r0, [sp]
|
|
ldr r9, [r0, #12]
|
|
cmp r7, r9
|
|
movhi r7, r9
|
|
stm r0, {r5-r7} @ high, bits, buf
|
|
str r8, [r0, #16] @ code_word
|
|
|
|
add sp, sp, #8
|
|
mov r0, r3
|
|
pop {r4-r11,pc}
|
|
2:
|
|
add r4, r3, r3, lsl #5
|
|
cmp r3, #16
|
|
add r4, r2, r4
|
|
pkhtb r11, r11, r11, asr #16
|
|
bne 0b
|
|
b 6b
|
|
3:
|
|
ldrb r0, [r4, #3]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
ldrb r9, [lr, r5]
|
|
bge 1f
|
|
|
|
mov r12, #2
|
|
ldrb r0, [r4, #4]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r12, #1
|
|
ldrb r9, [lr, r5]
|
|
blt 4f
|
|
ldrb r0, [r4, #5]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r12, #1
|
|
ldrb r9, [lr, r5]
|
|
b 4f
|
|
1:
|
|
ldrb r0, [r4, #6]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
ldrb r9, [lr, r5]
|
|
bge 3f
|
|
|
|
ldrb r0, [r4, #7]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
ldrb r9, [lr, r5]
|
|
bge 2f
|
|
|
|
mov r12, #5
|
|
mov r0, #159
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r12, r12, #1
|
|
ldrb r9, [lr, r5]
|
|
b 4f
|
|
2:
|
|
mov r12, #7
|
|
mov r0, #165
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r12, r12, #2
|
|
ldrb r9, [lr, r5]
|
|
mov r0, #145
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r12, r12, #1
|
|
ldrb r9, [lr, r5]
|
|
b 4f
|
|
3:
|
|
ldrb r0, [r4, #8]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
addge r4, r4, #1
|
|
ldrb r9, [lr, r5]
|
|
movge r12, #2
|
|
movlt r12, #0
|
|
ldrb r0, [r4, #9]
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
mov r9, #8
|
|
addge r12, r12, #1
|
|
movrel r4, ff_vp8_dct_cat_prob
|
|
lsl r9, r9, r12
|
|
ldr r4, [r4, r12, lsl #2]
|
|
add r12, r9, #3
|
|
mov r1, #0
|
|
ldrb r0, [r4], #1
|
|
1:
|
|
ldrb r9, [lr, r5]
|
|
lsl r1, r1, #1
|
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10
|
|
ldrb r0, [r4], #1
|
|
addge r1, r1, #1
|
|
cmp r0, #0
|
|
bne 1b
|
|
ldrb r9, [lr, r5]
|
|
add r12, r12, r1
|
|
ldr r1, [sp, #4]
|
|
4:
|
|
add r4, r3, r3, lsl #5
|
|
add r4, r2, r4
|
|
add r4, r4, #22
|
|
rac_get_128 r5, r6, r7, r8, r9, r10
|
|
rsbge r12, r12, #0
|
|
smulbb r12, r12, r11
|
|
movrel r9, zigzag_scan-1
|
|
ldrb r9, [r9, r3]
|
|
cmp r3, #16
|
|
strh r12, [r1, r9]
|
|
bge 6b
|
|
b 5b
|
|
endfunc
|
|
|
|
.section .rodata
|
|
zigzag_scan:
|
|
.byte 0, 2, 8, 16
|
|
.byte 10, 4, 6, 12
|
|
.byte 18, 24, 26, 20
|
|
.byte 14, 22, 28, 30
|