ed9c66f584
Instead of using the predict buffer, the decoder now writes
the predictor into the recon buffer. For blocks with eob=0,
unnecessary idcts can be eliminated. This gave a performance
boost of ~1.8% for the HD clips used.
Tero: Added needed changes to ARM side and scheduled some
assembly code to prevent interlocks.
Patch Set 6: Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
into this commit because of similarities in the idct
functions.
Patch Set 7: EC bug fix.
Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6
71 lines
2.0 KiB
NASM
71 lines
2.0 KiB
NASM
;
|
|
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
|
|
;
|
|
; Use of this source code is governed by a BSD-style license and patent
|
|
; grant that can be found in the LICENSE file in the root of the source
|
|
; tree. All contributing project authors may be found in the AUTHORS
|
|
; file in the root of the source tree.
|
|
;
|
|
|
|
EXPORT |vp8_dc_only_idct_add_v6|
|
|
|
|
AREA |.text|, CODE, READONLY
|
|
|
|
;void vp8_dc_only_idct_add_c(short input_dc, unsigned char *pred_ptr,
|
|
; int pred_stride, unsigned char *dst_ptr,
|
|
; int dst_stride)
|
|
; r0 input_dc
|
|
; r1 pred_ptr
|
|
; r2 pred_stride
|
|
; r3 dst_ptr
|
|
; sp dst_stride
|
|
|
|
|vp8_dc_only_idct_add_v6| PROC
|
|
stmdb sp!, {r4 - r7}
|
|
|
|
add r0, r0, #4 ; input_dc += 4
|
|
ldr r12, c0x0000FFFF
|
|
ldr r4, [r1], r2
|
|
and r0, r12, r0, asr #3 ; input_dc >> 3 + mask
|
|
ldr r6, [r1], r2
|
|
orr r0, r0, r0, lsl #16 ; a1 | a1
|
|
|
|
ldr r12, [sp, #16] ; dst stride
|
|
|
|
uxtab16 r5, r0, r4 ; a1+2 | a1+0
|
|
uxtab16 r4, r0, r4, ror #8 ; a1+3 | a1+1
|
|
uxtab16 r7, r0, r6
|
|
uxtab16 r6, r0, r6, ror #8
|
|
usat16 r5, #8, r5
|
|
usat16 r4, #8, r4
|
|
usat16 r7, #8, r7
|
|
usat16 r6, #8, r6
|
|
orr r5, r5, r4, lsl #8
|
|
orr r7, r7, r6, lsl #8
|
|
ldr r4, [r1], r2
|
|
str r5, [r3], r12
|
|
ldr r6, [r1]
|
|
str r7, [r3], r12
|
|
|
|
uxtab16 r5, r0, r4
|
|
uxtab16 r4, r0, r4, ror #8
|
|
uxtab16 r7, r0, r6
|
|
uxtab16 r6, r0, r6, ror #8
|
|
usat16 r5, #8, r5
|
|
usat16 r4, #8, r4
|
|
usat16 r7, #8, r7
|
|
usat16 r6, #8, r6
|
|
orr r5, r5, r4, lsl #8
|
|
orr r7, r7, r6, lsl #8
|
|
str r5, [r3], r12
|
|
str r7, [r3]
|
|
|
|
ldmia sp!, {r4 - r7}
|
|
bx lr
|
|
|
|
ENDP ; |vp8_dc_only_idct_add_v6|
|
|
|
|
; Constant Pool
|
|
c0x0000FFFF DCD 0x0000FFFF
|
|
END
|