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ARM: add new h264 idct functions

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Originally committed as revision 16312 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2008-12-25 23:13:43 +00:00
parent 337e3fd990
commit 760badc1df
2 changed files with 105 additions and 0 deletions
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12
libavcodec/arm/dsputil_neon.c
View File

@ -94,6 +94,15 @@ void ff_h264_h_loop_filter_chroma_neon(uint8_t *pix, int stride, int alpha,
void ff_h264_idct_add_neon(uint8_t *dst, DCTELEM *block, int stride);
void ff_h264_idct_dc_add_neon(uint8_t *dst, DCTELEM *block, int stride);
void ff_h264_idct_add16_neon(uint8_t *dst, const int *block_offset,
DCTELEM *block, int stride,
const uint8_t nnzc[6*8]);
void ff_h264_idct_add16intra_neon(uint8_t *dst, const int *block_offset,
DCTELEM *block, int stride,
const uint8_t nnzc[6*8]);
void ff_h264_idct_add8_neon(uint8_t **dest, const int *block_offset,
DCTELEM *block, int stride,
const uint8_t nnzc[6*8]);
void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
{
@ -166,4 +175,7 @@ void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
c->h264_idct_add = ff_h264_idct_add_neon;
c->h264_idct_dc_add = ff_h264_idct_dc_add_neon;
c->h264_idct_add16 = ff_h264_idct_add16_neon;
c->h264_idct_add16intra = ff_h264_idct_add16intra_neon;
c->h264_idct_add8 = ff_h264_idct_add8_neon;
}

93
libavcodec/arm/h264idct_neon.S
View File

@ -20,6 +20,7 @@
#include "asm.S"
preserve8
.fpu neon
.text
@ -94,3 +95,95 @@ function ff_h264_idct_dc_add_neon, export=1
vst1.32 {d1[1]}, [r0,:32], r2
bx lr
.endfunc
function ff_h264_idct_add16_neon, export=1
push {r4-r8,lr}
mov r4, r0
mov r5, r1
mov r1, r2
mov r2, r3
ldr r6, [sp, #24]
movw r7, #:lower16:scan8
movt r7, #:upper16:scan8
mov ip, #16
1: ldrb r8, [r7], #1
ldr r0, [r5], #4
ldrb r8, [r6, r8]
subs r8, r8, #1
blt 2f
ldrsh lr, [r1]
add r0, r0, r4
movne lr, #0
cmp lr, #0
adrne lr, ff_h264_idct_dc_add_neon
adreq lr, ff_h264_idct_add_neon
blx lr
2: subs ip, ip, #1
add r1, r1, #32
bne 1b
pop {r4-r8,pc}
.endfunc
function ff_h264_idct_add16intra_neon, export=1
push {r4-r8,lr}
mov r4, r0
mov r5, r1
mov r1, r2
mov r2, r3
ldr r6, [sp, #24]
movw r7, #:lower16:scan8
movt r7, #:upper16:scan8
mov ip, #16
1: ldrb r8, [r7], #1
ldr r0, [r5], #4
ldrb r8, [r6, r8]
add r0, r0, r4
cmp r8, #0
ldrsh r8, [r1]
adrne lr, ff_h264_idct_add_neon
adreq lr, ff_h264_idct_dc_add_neon
cmpeq r8, #0
blxne lr
subs ip, ip, #1
add r1, r1, #32
bne 1b
pop {r4-r8,pc}
.endfunc
function ff_h264_idct_add8_neon, export=1
push {r4-r10,lr}
ldm r0, {r4,r9}
add r5, r1, #16*4
add r1, r2, #16*32
mov r2, r3
ldr r6, [sp, #32]
movw r7, #:lower16:scan8+16
movt r7, #:upper16:scan8+16
mov ip, #8
1: ldrb r8, [r7], #1
ldr r0, [r5], #4
ldrb r8, [r6, r8]
tst ip, #4
addeq r0, r0, r4
addne r0, r0, r9
cmp r8, #0
ldrsh r8, [r1]
adrne lr, ff_h264_idct_add_neon
adreq lr, ff_h264_idct_dc_add_neon
cmpeq r8, #0
blxne lr
subs ip, ip, #1
add r1, r1, #32
bne 1b
pop {r4-r10,pc}
.endfunc
.section .rodata
scan8: .byte 4+1*8, 5+1*8, 4+2*8, 5+2*8
.byte 6+1*8, 7+1*8, 6+2*8, 7+2*8
.byte 4+3*8, 5+3*8, 4+4*8, 5+4*8
.byte 6+3*8, 7+3*8, 6+4*8, 7+4*8
.byte 1+1*8, 2+1*8
.byte 1+2*8, 2+2*8
.byte 1+4*8, 2+4*8
.byte 1+5*8, 2+5*8