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.
120 lines
4.3 KiB
120 lines
4.3 KiB
@ |
|
@ ARMv4-optimized IDCT functions |
|
@ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp> |
|
@ |
|
@ 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 "config.h" |
|
#include "libavutil/arm/asm.S" |
|
|
|
@ void ff_add_pixels_clamped_arm(int16_t *block, uint8_t *dest, ptrdiff_t stride) |
|
function ff_add_pixels_clamped_arm, export=1, align=5 |
|
push {r4-r10} |
|
mov r10, #8 |
|
1: |
|
ldr r4, [r1] /* load dest */ |
|
/* block[0] and block[1]*/ |
|
ldrsh r5, [r0] |
|
ldrsh r7, [r0, #2] |
|
and r6, r4, #0xFF |
|
and r8, r4, #0xFF00 |
|
add r6, r6, r5 |
|
add r8, r7, r8, lsr #8 |
|
mvn r5, r5 |
|
mvn r7, r7 |
|
tst r6, #0x100 |
|
it ne |
|
movne r6, r5, lsr #24 |
|
tst r8, #0x100 |
|
it ne |
|
movne r8, r7, lsr #24 |
|
mov r9, r6 |
|
ldrsh r5, [r0, #4] /* moved form [A] */ |
|
orr r9, r9, r8, lsl #8 |
|
/* block[2] and block[3] */ |
|
/* [A] */ |
|
ldrsh r7, [r0, #6] |
|
and r6, r4, #0xFF0000 |
|
and r8, r4, #0xFF000000 |
|
add r6, r5, r6, lsr #16 |
|
add r8, r7, r8, lsr #24 |
|
mvn r5, r5 |
|
mvn r7, r7 |
|
tst r6, #0x100 |
|
it ne |
|
movne r6, r5, lsr #24 |
|
tst r8, #0x100 |
|
it ne |
|
movne r8, r7, lsr #24 |
|
orr r9, r9, r6, lsl #16 |
|
ldr r4, [r1, #4] /* moved form [B] */ |
|
orr r9, r9, r8, lsl #24 |
|
/* store dest */ |
|
ldrsh r5, [r0, #8] /* moved form [C] */ |
|
str r9, [r1] |
|
|
|
/* load dest */ |
|
/* [B] */ |
|
/* block[4] and block[5] */ |
|
/* [C] */ |
|
ldrsh r7, [r0, #10] |
|
and r6, r4, #0xFF |
|
and r8, r4, #0xFF00 |
|
add r6, r6, r5 |
|
add r8, r7, r8, lsr #8 |
|
mvn r5, r5 |
|
mvn r7, r7 |
|
tst r6, #0x100 |
|
it ne |
|
movne r6, r5, lsr #24 |
|
tst r8, #0x100 |
|
it ne |
|
movne r8, r7, lsr #24 |
|
mov r9, r6 |
|
ldrsh r5, [r0, #12] /* moved from [D] */ |
|
orr r9, r9, r8, lsl #8 |
|
/* block[6] and block[7] */ |
|
/* [D] */ |
|
ldrsh r7, [r0, #14] |
|
and r6, r4, #0xFF0000 |
|
and r8, r4, #0xFF000000 |
|
add r6, r5, r6, lsr #16 |
|
add r8, r7, r8, lsr #24 |
|
mvn r5, r5 |
|
mvn r7, r7 |
|
tst r6, #0x100 |
|
it ne |
|
movne r6, r5, lsr #24 |
|
tst r8, #0x100 |
|
it ne |
|
movne r8, r7, lsr #24 |
|
orr r9, r9, r6, lsl #16 |
|
add r0, r0, #16 /* moved from [E] */ |
|
orr r9, r9, r8, lsl #24 |
|
subs r10, r10, #1 /* moved from [F] */ |
|
/* store dest */ |
|
str r9, [r1, #4] |
|
|
|
/* [E] */ |
|
/* [F] */ |
|
add r1, r1, r2 |
|
bne 1b |
|
|
|
pop {r4-r10} |
|
bx lr |
|
endfunc
|
|
|