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Code Issues Releases Activity

avcodec/h264: mmx 4:2:2 idct add8 function

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2.87 times faster (1830 vs. 638 cycles)
This commit is contained in:
James Darnley 2016-11-28 18:22:17 +01:00
parent 815ea8c6cc
commit 1dae7ffa0b
2 changed files with 38 additions and 1 deletions
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32
libavcodec/x86/h264_idct.asm
View File

@ -697,6 +697,38 @@ cglobal h264_idct_add8_8, 5, 8 + npicregs, 0, dst1, block_offset, block, stride,
call h264_idct_add8_mmx_plane
RET
cglobal h264_idct_add8_422_8, 5, 8 + npicregs, 0, dst1, block_offset, block, stride, nnzc, cntr, coeff, dst2, picreg
; dst1, block_offset, block, stride, nnzc, cntr, coeff, dst2, picreg
movsxdifnidn r3, r3d
%ifdef PIC
lea picregq, [scan8_mem]
%endif
%if ARCH_X86_64
mov dst2q, r0
%endif
mov r5, 16 ; i
add r2, 512 ; i * 16 * sizeof(dctcoef) ; #define dctcoef int16_t
call h264_idct_add8_mmx_plane
add r5, 4
call h264_idct_add8_mmx_plane
%if ARCH_X86_64
add dst2q, gprsize ; dest[1]
%else
add r0mp, gprsize
%endif
add r5, 4 ; set to 32
add r2, 256 ; set to i * 16 * sizeof(dctcoef)
call h264_idct_add8_mmx_plane
add r5, 4
call h264_idct_add8_mmx_plane
RET
h264_idct_add8_mmxext_plane:
movsxdifnidn r3, r3d
.nextblock:

7
libavcodec/x86/h264dsp_init.c
View File

@ -78,6 +78,8 @@ IDCT_ADD_REP_FUNC2(, 8, 8, sse2)
IDCT_ADD_REP_FUNC2(, 8, 10, sse2)
IDCT_ADD_REP_FUNC2(, 8, 10, avx)
IDCT_ADD_REP_FUNC2(, 8_422, 8, mmx)
void ff_h264_luma_dc_dequant_idct_mmx(int16_t *output, int16_t *input, int qmul);
void ff_h264_luma_dc_dequant_idct_sse2(int16_t *output, int16_t *input, int qmul);
@ -228,8 +230,11 @@ av_cold void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
c->h264_idct_add16 = ff_h264_idct_add16_8_mmx;
c->h264_idct8_add4 = ff_h264_idct8_add4_8_mmx;
if (chroma_format_idc <= 1)
if (chroma_format_idc <= 1) {
c->h264_idct_add8 = ff_h264_idct_add8_8_mmx;
} else {
c->h264_idct_add8 = ff_h264_idct_add8_422_8_mmx;
}
c->h264_idct_add16intra = ff_h264_idct_add16intra_8_mmx;
if (cpu_flags & AV_CPU_FLAG_CMOV)
c->h264_luma_dc_dequant_idct = ff_h264_luma_dc_dequant_idct_mmx;