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ARM: NEON optimised dct_unquantize_h263_{intra,inter} 

Originally committed as revision 23386 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-05-29 15:29:40 +00:00
parent 2c780abfdb
commit 41331b65f2
3 changed files with 123 additions and 0 deletions
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1
libavcodec/arm/Makefile
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@ -49,5 +49,6 @@ NEON-OBJS-$(CONFIG_VP6_DECODER) += arm/vp56dsp_neon.o
OBJS-$(HAVE_NEON) += arm/dsputil_init_neon.o \
arm/dsputil_neon.o \
arm/int_neon.o \
arm/mpegvideo_neon.o \
arm/simple_idct_neon.o \
$(NEON-OBJS-yes)

10
libavcodec/arm/mpegvideo_arm.c
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@ -23,6 +23,11 @@
#include "libavcodec/mpegvideo.h"
#include "mpegvideo_arm.h"
void ff_dct_unquantize_h263_inter_neon(MpegEncContext *s, DCTELEM *block,
int n, int qscale);
void ff_dct_unquantize_h263_intra_neon(MpegEncContext *s, DCTELEM *block,
int n, int qscale);
void MPV_common_init_arm(MpegEncContext *s)
{
/* IWMMXT support is a superset of armv5te, so
@ -35,4 +40,9 @@ void MPV_common_init_arm(MpegEncContext *s)
#if HAVE_IWMMXT
MPV_common_init_iwmmxt(s);
#endif
if (HAVE_NEON) {
s->dct_unquantize_h263_intra = ff_dct_unquantize_h263_intra_neon;
s->dct_unquantize_h263_inter = ff_dct_unquantize_h263_inter_neon;
}
}

112
libavcodec/arm/mpegvideo_neon.S Normal file
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@ -0,0 +1,112 @@
/*
* 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"
#define Y_DC_SCALE 0xa54
#define C_DC_SCALE 0xa58
#define AC_PRED 0xa80
#define BLOCK_LAST_INDEX 0x2278
#define INTER_SCANTAB_RASTER_END 0x2478
#define H263_AIC 0x2728
function ff_dct_unquantize_h263_inter_neon, export=1
add r0, r0, #0x2200
add r12, r0, #BLOCK_LAST_INDEX-0x2200
ldr r12, [r12, r2, lsl #2]
add r0, r0, #INTER_SCANTAB_RASTER_END-0x2200
ldrb r12, [r0, r12]
sub r2, r3, #1
lsl r0, r3, #1
orr r2, r2, #1
add r3, r12, #1
endfunc
function ff_dct_unquantize_h263_neon, export=1
vdup.16 q15, r0 @ qmul
vdup.16 q14, r2 @ qadd
vneg.s16 q13, q14
cmp r3, #4
mov r0, r1
ble 2f
1:
vld1.16 {q0}, [r0,:128]!
vclt.s16 q3, q0, #0
vld1.16 {q8}, [r0,:128]!
vceq.s16 q1, q0, #0
vmul.s16 q2, q0, q15
vclt.s16 q11, q8, #0
vmul.s16 q10, q8, q15
vbsl q3, q13, q14
vbsl q11, q13, q14
vadd.s16 q2, q2, q3
vceq.s16 q9, q8, #0
vadd.s16 q10, q10, q11
vbif q0, q2, q1
vbif q8, q10, q9
subs r3, r3, #16
vst1.16 {q0}, [r1,:128]!
vst1.16 {q8}, [r1,:128]!
bxle lr
cmp r3, #8
bgt 1b
2:
vld1.16 {d0}, [r0,:64]
vclt.s16 d3, d0, #0
vceq.s16 d1, d0, #0
vmul.s16 d2, d0, d30
vbsl d3, d26, d28
vadd.s16 d2, d2, d3
vbif d0, d2, d1
vst1.16 {d0}, [r1,:64]
bx lr
endfunc
function ff_dct_unquantize_h263_intra_neon, export=1
push {r4-r6,lr}
ldr r6, [r0, #AC_PRED]
add r5, r0, #0x2700
cmp r6, #0
movne r12, #63
bne 1f
add lr, r0, #0x2200
add r12, lr, #BLOCK_LAST_INDEX-0x2200
add lr, lr, #INTER_SCANTAB_RASTER_END-0x2200
ldr r12, [r12, r2, lsl #2]
ldrb r12, [lr, r12]
1: ldr r5, [r5, #H263_AIC-0x2700]
ldrsh r4, [r1]
cmp r5, #0
mov r5, r1
movne r2, #0
bne 2f
cmp r2, #4
addge r0, r0, #4
sub r2, r3, #1
ldr r6, [r0, #Y_DC_SCALE]
orr r2, r2, #1
smulbb r4, r4, r6
2: lsl r0, r3, #1
add r3, r12, #1
bl ff_dct_unquantize_h263_neon
vmov.16 d0[0], r4
vst1.16 {d0[0]}, [r5]
pop {r4-r6,pc}
endfunc