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avcodec/vp9dsp: add DC only versions for idct/idct.

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before:
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  16.29s user 0.02s system 99% cpu 16.323 total
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  16.32s user 0.01s system 99% cpu 16.351 total
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  16.27s user 0.05s system 99% cpu 16.335 total

after:
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  15.22s user 0.03s system 99% cpu 15.257 total
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  15.20s user 0.02s system 99% cpu 15.237 total
  ./ffmpeg -v 0 -nostats -i ~/samples/vp9/etv.webm -f null -  15.19s user 0.02s system 99% cpu 15.227 total
This commit is contained in:
Clément Bœsch 2013-11-22 20:16:09 +01:00
parent 2e97e24409
commit 64821f5a7c
1 changed files with 22 additions and 0 deletions
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22
libavcodec/vp9dsp.c
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@ -853,6 +853,12 @@ static av_cold void vp9dsp_intrapred_init(VP9DSPContext *dsp)
#undef init_intra_pred
}
#define has_dconly_idct_idct 1
#define has_dconly_iadst_idct 0
#define has_dconly_idct_iadst 0
#define has_dconly_iadst_iadst 0
#define has_dconly_iwht_iwht 0
#define itxfm_wrapper(type_a, type_b, sz, bits) \
static void type_a##_##type_b##_##sz##x##sz##_add_c(uint8_t *dst, \
ptrdiff_t stride, \
@ -860,6 +866,22 @@ static void type_a##_##type_b##_##sz##x##sz##_add_c(uint8_t *dst, \
{ \
int i, j; \
int16_t tmp[sz * sz], out[sz]; \
\
if (has_dconly_##type_a##_##type_b && eob == 1) { \
const int t = (((block[0] * 11585 + (1 << 13)) >> 14) \
* 11585 + (1 << 13)) >> 14; \
block[0] = 0; \
for (i = 0; i < sz; i++) { \
for (j = 0; j < sz; j++) \
dst[j * stride] = av_clip_uint8(dst[j * stride] + \
(bits ? \
(t + (1 << (bits - 1))) >> bits : \
t)); \
dst++; \
} \
return; \
} \
\
for (i = 0; i < sz; i++) \
type_a##sz##_1d(block + i, sz, tmp + i * sz, 0); \
memset(block, 0, sz * sz * sizeof(*block)); \