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Change rounding of the horizontal DWT to match the vertical one.

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This allows some simplifications and optimizations and should
not have any effect on quality.

Originally committed as revision 10172 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-08-21 16:29:40 +00:00
parent 7506d47aa3
commit ce611a27be
6 changed files with 51 additions and 61 deletions
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44
libavcodec/i386/snowdsp_mmx.c
View File

@ -111,8 +111,7 @@ void ff_snow_horizontal_compose97i_sse2(DWTELEM *b, int width){
i = 0;
asm volatile(
"pcmpeqd %%xmm7, %%xmm7 \n\t"
"psrad $29, %%xmm7 \n\t"
"pslld $1, %%xmm7 \n\t"
::);
for(; i<w_l-7; i+=8){
asm volatile(
@ -157,25 +156,21 @@ void ff_snow_horizontal_compose97i_sse2(DWTELEM *b, int width){
"movdqu 20(%1), %%xmm6 \n\t"
"paddd (%1), %%xmm2 \n\t"
"paddd 16(%1), %%xmm6 \n\t"
"movdqa %%xmm2, %%xmm0 \n\t"
"movdqa %%xmm6, %%xmm4 \n\t"
"pslld $2, %%xmm2 \n\t"
"pslld $2, %%xmm6 \n\t"
"psubd %%xmm2, %%xmm0 \n\t"
"psubd %%xmm6, %%xmm4 \n\t"
"psrad $1, %%xmm0 \n\t"
"psrad $1, %%xmm4 \n\t"
"movdqu (%0), %%xmm2 \n\t"
"movdqu 16(%0), %%xmm6 \n\t"
"psubd %%xmm0, %%xmm2 \n\t"
"psubd %%xmm4, %%xmm6 \n\t"
"movdqu (%0), %%xmm0 \n\t"
"movdqu 16(%0), %%xmm4 \n\t"
"paddd %%xmm2, %%xmm0 \n\t"
"paddd %%xmm6, %%xmm4 \n\t"
"psrad $1, %%xmm2 \n\t"
"psrad $1, %%xmm6 \n\t"
"paddd %%xmm0, %%xmm2 \n\t"
"paddd %%xmm4, %%xmm6 \n\t"
"movdqa %%xmm2, (%2) \n\t"
"movdqa %%xmm6, 16(%2) \n\t"
:: "r"(&src[i]), "r"(&b[i]), "r"(&temp[i])
: "memory"
);
}
snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO, W_AS);
snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO+1, W_AS);
}
{
@ -291,10 +286,9 @@ void ff_snow_horizontal_compose97i_mmx(DWTELEM *b, int width){
DWTELEM * const ref = b+w2 - 1;
i = 1;
b[0] = b[0] + (((2 * ref[1] + W_BO-1) + 4 * b[0]) >> W_BS);
b[0] = b[0] + (((2 * ref[1] + W_BO) + 4 * b[0]) >> W_BS);
asm volatile(
"pcmpeqd %%mm7, %%mm7 \n\t"
"psrld $29, %%mm7 \n\t"
"pslld $1, %%mm7 \n\t"
::);
for(; i<w_l-3; i+=4){
asm volatile(
@ -333,16 +327,12 @@ void ff_snow_horizontal_compose97i_mmx(DWTELEM *b, int width){
"movq 12(%1), %%mm6 \n\t"
"paddd (%1), %%mm2 \n\t"
"paddd 8(%1), %%mm6 \n\t"
"pxor %%mm0, %%mm0 \n\t" //note: the 2 xor could be avoided if we would flip the rounding direction
"pxor %%mm4, %%mm4 \n\t"
"psubd %%mm2, %%mm0 \n\t"
"psubd %%mm6, %%mm4 \n\t"
"psrad $1, %%mm0 \n\t"
"psrad $1, %%mm4 \n\t"
"psubd %%mm0, %%mm2 \n\t"
"psubd %%mm4, %%mm6 \n\t"
"movq (%0), %%mm0 \n\t"
"movq 8(%0), %%mm4 \n\t"
"paddd %%mm2, %%mm0 \n\t"
"paddd %%mm6, %%mm4 \n\t"
"psrad $1, %%mm2 \n\t"
"psrad $1, %%mm6 \n\t"
"paddd %%mm0, %%mm2 \n\t"
"paddd %%mm4, %%mm6 \n\t"
"movq %%mm2, (%2) \n\t"
@ -351,7 +341,7 @@ void ff_snow_horizontal_compose97i_mmx(DWTELEM *b, int width){
: "memory"
);
}
snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO, W_AS);
snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -W_AM, W_AO+1, W_AS);
}
{

12
libavcodec/snow.c
View File

@ -775,7 +775,7 @@ static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref, int
int i;
assert(shift == 4);
#define LIFTS(src, ref, inv) ((inv) ? (src) + (((ref) + 4*(src))>>shift): (16*4*(src) + 4*(ref) + 8 + (5<<27))/(5*16) - (1<<23))
#define LIFTS(src, ref, inv) ((inv) ? (src) + (((ref) + 4*(src))>>shift): -((-16*4*(src) + 4*(ref) + add + 5 + (5<<27))/(5*16) - (1<<23)))
if(mirror_left){
dst[0] = LIFTS(src[0], mul*2*ref[0]+add, inverse);
dst += dst_step;
@ -1113,8 +1113,8 @@ static void horizontal_decompose97i(DWTELEM *b, int width){
DWTELEM temp[width];
const int w2= (width+1)>>1;
lift (temp+w2, b +1, b , 1, 2, 2, width, -W_AM, W_AO, W_AS, 1, 0);
liftS(temp , b , temp+w2, 1, 2, 1, width, -W_BM, W_BO, W_BS, 0, 0);
lift (temp+w2, b +1, b , 1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
liftS(temp , b , temp+w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0);
lift5(b +w2, temp+w2, temp , 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
lift (b , temp , b +w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
}
@ -1150,7 +1150,7 @@ static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, int w
#ifdef liftS
b1[i] -= (W_BM*(b0[i] + b2[i])+W_BO)>>W_BS;
#else
b1[i] = (16*4*b1[i] - 4*(b0[i] + b2[i]) + 8*5 + (5<<27)) / (5*16) - (1<<23);
b1[i] = (16*4*b1[i] - 4*(b0[i] + b2[i]) + W_BO*5 + (5<<27)) / (5*16) - (1<<23);
#endif
}
}
@ -1344,8 +1344,8 @@ void ff_snow_horizontal_compose97i(DWTELEM *b, int width){
lift (temp , b , b +w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 1);
lift5(temp+w2, b +w2, temp , 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 1);
liftS(b , temp , temp+w2, 2, 1, 1, width, W_BM, W_BO-1, W_BS, 0, 1);
lift (b+1 , temp+w2, b , 2, 1, 2, width, -W_AM, W_AO, W_AS, 1, 1);
liftS(b , temp , temp+w2, 2, 1, 1, width, W_BM, W_BO, W_BS, 0, 1);
lift (b+1 , temp+w2, b , 2, 1, 2, width, W_AM, W_AO, W_AS, 1, 0);
}
static void vertical_compose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, int width){

4
libavcodec/snow.h
View File

@ -165,11 +165,11 @@ static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELE
static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
for(; i<w; i++){
dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO-1 + 4 * src[i]) >> W_BS);
dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
}
if(width&1){
dst[w] = src[w] + ((2 * ref[w] + W_BO-1 + 4 * src[w]) >> W_BS);
dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
}
}

6
tests/ffmpeg.regression.ref
View File

@ -141,9 +141,9 @@ f8f51fa737add17f7fecaefa118b57ed *./tests/data/a-ffv1.avi
2654678 ./tests/data/a-ffv1.avi
799d3db687f6cdd7a837ec156efc171f *./tests/data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
9078723c943de5d79490f54b99e6ea9e *./tests/data/a-snow.avi
156656 ./tests/data/a-snow.avi
f2932084b52e2ede167c9ba21eae0656 *./tests/data/out.yuv
958d649d09b7361d5f00b5b3fcccbcd2 *./tests/data/a-snow.avi
156606 ./tests/data/a-snow.avi
b19cb7f9134f922326028c6bb44e96de *./tests/data/out.yuv
stddev: 23.14 PSNR:20.83 bytes:7602176
ba999e86070aa971376e7f317a022c37 *./tests/data/a-snow53.avi
3519486 ./tests/data/a-snow53.avi

6
tests/rotozoom.regression.ref
View File

@ -141,9 +141,9 @@ d72b0960e162d4998b9acbabb07e99ab *./tests/data/a-ffv1.avi
3525804 ./tests/data/a-ffv1.avi
dde5895817ad9d219f79a52d0bdfb001 *./tests/data/out.yuv
stddev: 0.00 PSNR:99.99 bytes:7602176
40a6e938ac2bd92ee12cd57925e86454 *./tests/data/a-snow.avi
68758 ./tests/data/a-snow.avi
1e356854142898c7c4aab4bfedadf235 *./tests/data/out.yuv
2cfa1bdb443d04a890208a83fd239461 *./tests/data/a-snow.avi
68872 ./tests/data/a-snow.avi
64a0495b7ab53509d3b791465262795c *./tests/data/out.yuv
stddev: 10.86 PSNR:27.40 bytes:7602176
3d0da6aeec9b80c6ee0ff4b747bdd0f0 *./tests/data/a-snow53.avi
2721980 ./tests/data/a-snow53.avi

40
tests/seek.regression.ref
View File

@ -2046,51 +2046,51 @@ ret: 0 st:-1 ts:-0.645825 flags:1
ret: 0 st: 0 dts:0.040000 pts:0.040000 pos:9610 size:1075 flags:0
----------------
tests/data/a-snow.avi
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st:-1 ts:-1.000000 flags:0
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st:-1 ts:1.894167 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46794 size:3663 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46908 size:3663 flags:1
ret: 0 st: 0 ts:0.800000 flags:0
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31726 size:3478 flags:1
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31690 size:3478 flags:1
ret:-1 st: 0 ts:-0.320000 flags:1
ret:-1 st:-1 ts:2.576668 flags:0
ret: 0 st:-1 ts:1.470835 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46794 size:3663 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46908 size:3663 flags:1
ret: 0 st: 0 ts:0.360000 flags:0
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:18006 size:3229 flags:1
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:17990 size:3229 flags:1
ret:-1 st: 0 ts:-0.760000 flags:1
ret:-1 st:-1 ts:2.153336 flags:0
ret: 0 st:-1 ts:1.047503 flags:1
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31726 size:3478 flags:1
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31690 size:3478 flags:1
ret: 0 st: 0 ts:-0.040000 flags:0
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st: 0 ts:2.840000 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63240 size:3635 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63350 size:3635 flags:1
ret: 0 st:-1 ts:1.730004 flags:0
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63240 size:3635 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63350 size:3635 flags:1
ret: 0 st:-1 ts:0.624171 flags:1
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:18006 size:3229 flags:1
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:17990 size:3229 flags:1
ret: 0 st: 0 ts:-0.480000 flags:0
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st: 0 ts:2.400000 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63240 size:3635 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63350 size:3635 flags:1
ret: 0 st:-1 ts:1.306672 flags:0
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46794 size:3663 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46908 size:3663 flags:1
ret: 0 st:-1 ts:0.200839 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st: 0 ts:-0.920000 flags:0
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2986 flags:1
ret: 0 st: 0 dts:0.000000 pts:0.000000 pos:5660 size:2987 flags:1
ret: 0 st: 0 ts:2.000000 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63240 size:3635 flags:1
ret: 0 st: 0 dts:1.920000 pts:1.920000 pos:63350 size:3635 flags:1
ret: 0 st:-1 ts:0.883340 flags:0
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31726 size:3478 flags:1
ret: 0 st: 0 dts:0.960000 pts:0.960000 pos:31690 size:3478 flags:1
ret:-1 st:-1 ts:-0.222493 flags:1
ret:-1 st: 0 ts:2.680000 flags:0
ret: 0 st: 0 ts:1.560000 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46794 size:3663 flags:1
ret: 0 st: 0 dts:1.440000 pts:1.440000 pos:46908 size:3663 flags:1
ret: 0 st:-1 ts:0.460008 flags:0
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:18006 size:3229 flags:1
ret: 0 st: 0 dts:0.480000 pts:0.480000 pos:17990 size:3229 flags:1
ret:-1 st:-1 ts:-0.645825 flags:1
----------------
tests/data/a-snow53.avi