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ARMv6 optimised get_pixels 

Originally committed as revision 21701 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-09 16:13:38 +00:00
parent d2578ff9f1
commit f73a626ae4
2 changed files with 25 additions and 0 deletions
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22
libavcodec/arm/dsputil_armv6.S
View File

@ -287,6 +287,28 @@ function ff_add_pixels_clamped_armv6, export=1
pop {r4-r8,pc}
.endfunc
function ff_get_pixels_armv6, export=1
pld [r1, r2]
push {r4-r8, lr}
mov lr, #8
1:
ldrd r4, r5, [r1], r2
subs lr, lr, #1
uxtb16 r6, r4
uxtb16 r4, r4, ror #8
uxtb16 r12, r5
uxtb16 r8, r5, ror #8
pld [r1, r2]
pkhbt r5, r6, r4, lsl #16
pkhtb r6, r4, r6, asr #16
pkhbt r7, r12, r8, lsl #16
pkhtb r12, r8, r12, asr #16
stm r0!, {r5,r6,r7,r12}
bgt 1b
pop {r4-r8, pc}
.endfunc
function ff_pix_abs16_armv6, export=1
ldr r0, [sp]
push {r4-r9, lr}

3
libavcodec/arm/dsputil_init_armv6.c
View File

@ -50,6 +50,8 @@ void ff_add_pixels_clamped_armv6(const DCTELEM *block,
uint8_t *restrict pixels,
int line_size);
void ff_get_pixels_armv6(DCTELEM *block, const uint8_t *pixels, int stride);
int ff_pix_abs16_armv6(void *s, uint8_t *blk1, uint8_t *blk2,
int line_size, int h);
int ff_pix_abs16_x2_armv6(void *s, uint8_t *blk1, uint8_t *blk2,
@ -92,6 +94,7 @@ void av_cold ff_dsputil_init_armv6(DSPContext* c, AVCodecContext *avctx)
c->avg_pixels_tab[1][0] = ff_avg_pixels8_armv6;
c->add_pixels_clamped = ff_add_pixels_clamped_armv6;
c->get_pixels = ff_get_pixels_armv6;
c->pix_abs[0][0] = ff_pix_abs16_armv6;
c->pix_abs[0][1] = ff_pix_abs16_x2_armv6;