mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
248 lines
8.4 KiB
248 lines
8.4 KiB
/* |
|
* Copyright (C) 2010 Mans Rullgard |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg 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. |
|
* |
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "asm.S" |
|
|
|
.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 |
|
it cs |
|
ldrhcs \t1, [\buf], #2 |
|
smlabb \h, \t0, \pr, \h |
|
T itttt cs |
|
rev16cs \t1, \t1 |
|
A orrcs \cw, \cw, \t1, lsl \bs |
|
T lslcs \t1, \t1, \bs |
|
T orrcs \cw, \cw, \t1 |
|
subcs \bs, \bs, #16 |
|
lsr \h, \h, #8 |
|
cmp \cw, \h, lsl #16 |
|
itt ge |
|
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 |
|
it cs |
|
ldrhcs \t1, [\buf], #2 |
|
mov \h, #128 |
|
it cs |
|
rev16cs \t1, \t1 |
|
add \h, \h, \t0, lsl #7 |
|
A orrcs \cw, \cw, \t1, lsl \bs |
|
T ittt cs |
|
T lslcs \t1, \t1, \bs |
|
T orrcs \cw, \cw, \t1 |
|
subcs \bs, \bs, #16 |
|
lsr \h, \h, #8 |
|
cmp \cw, \h, lsl #16 |
|
itt ge |
|
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 |
|
it ne |
|
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 |
|
it cs |
|
ldrhcs r10, [r7], #2 |
|
lsl r9, r5, r9 |
|
mov r5, #128 |
|
it cs |
|
rev16cs r10, r10 |
|
add r5, r5, r9, lsl #7 |
|
T ittt cs |
|
T lslcs r10, r10, r6 |
|
T orrcs r8, r8, r10 |
|
A orrcs r8, r8, r10, lsl r6 |
|
subcs r6, r6, #16 |
|
lsr r5, r5, #8 |
|
cmp r8, r5, lsl #16 |
|
movrel r10, zigzag_scan-1 |
|
itt ge |
|
subge r8, r8, r5, lsl #16 |
|
subge r5, r9, r5 |
|
ldrb r10, [r10, r3] |
|
it ge |
|
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 |
|
it hi |
|
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 |
|
it ge |
|
addge r12, #1 |
|
ldrb r9, [lr, r5] |
|
blt 4f |
|
ldrb r0, [r4, #5] |
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10 |
|
it ge |
|
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 |
|
it ge |
|
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 |
|
it ge |
|
addge r12, r12, #2 |
|
ldrb r9, [lr, r5] |
|
mov r0, #145 |
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10 |
|
it ge |
|
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 |
|
it ge |
|
addge r4, r4, #1 |
|
ldrb r9, [lr, r5] |
|
ite ge |
|
movge r12, #2 |
|
movlt r12, #0 |
|
ldrb r0, [r4, #9] |
|
rac_get_prob r5, r6, r7, r8, r0, r9, r10 |
|
mov r9, #8 |
|
it ge |
|
addge r12, r12, #1 |
|
movrel r4, X(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 |
|
it ge |
|
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 |
|
it ge |
|
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 |
|
|
|
const zigzag_scan |
|
.byte 0, 2, 8, 16 |
|
.byte 10, 4, 6, 12 |
|
.byte 18, 24, 26, 20 |
|
.byte 14, 22, 28, 30 |
|
endconst
|
|
|