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117 lines
3.8 KiB
117 lines
3.8 KiB
;****************************************************************************** |
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;* x86 optimized dithering format conversion |
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;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
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;* |
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;* This file is part of Libav. |
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;* |
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;* Libav is free software; you can redistribute it and/or |
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;* modify it under the terms of the GNU Lesser General Public |
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;* License as published by the Free Software Foundation; either |
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;* version 2.1 of the License, or (at your option) any later version. |
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;* |
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;* Libav is distributed in the hope that it will be useful, |
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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;* Lesser General Public License for more details. |
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;* |
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;* You should have received a copy of the GNU Lesser General Public |
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;* License along with Libav; if not, write to the Free Software |
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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;****************************************************************************** |
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%include "libavutil/x86/x86util.asm" |
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SECTION_RODATA 32 |
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; 1.0f / (2.0f * INT32_MAX) |
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pf_dither_scale: times 8 dd 2.32830643762e-10 |
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pf_s16_scale: times 4 dd 32753.0 |
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SECTION_TEXT |
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;------------------------------------------------------------------------------ |
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; void ff_quantize(int16_t *dst, float *src, float *dither, int len); |
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;------------------------------------------------------------------------------ |
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INIT_XMM sse2 |
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cglobal quantize, 4,4,3, dst, src, dither, len |
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lea lenq, [2*lend] |
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add dstq, lenq |
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lea srcq, [srcq+2*lenq] |
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lea ditherq, [ditherq+2*lenq] |
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neg lenq |
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mova m2, [pf_s16_scale] |
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.loop: |
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mulps m0, m2, [srcq+2*lenq] |
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mulps m1, m2, [srcq+2*lenq+mmsize] |
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addps m0, [ditherq+2*lenq] |
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addps m1, [ditherq+2*lenq+mmsize] |
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cvtps2dq m0, m0 |
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cvtps2dq m1, m1 |
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packssdw m0, m1 |
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mova [dstq+lenq], m0 |
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add lenq, mmsize |
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jl .loop |
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REP_RET |
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;------------------------------------------------------------------------------ |
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; void ff_dither_int_to_float_rectangular(float *dst, int *src, int len) |
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;------------------------------------------------------------------------------ |
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%macro DITHER_INT_TO_FLOAT_RECTANGULAR 0 |
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cglobal dither_int_to_float_rectangular, 3,3,3, dst, src, len |
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lea lenq, [4*lend] |
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add srcq, lenq |
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add dstq, lenq |
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neg lenq |
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mova m0, [pf_dither_scale] |
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.loop: |
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cvtdq2ps m1, [srcq+lenq] |
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cvtdq2ps m2, [srcq+lenq+mmsize] |
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mulps m1, m1, m0 |
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mulps m2, m2, m0 |
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mova [dstq+lenq], m1 |
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mova [dstq+lenq+mmsize], m2 |
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add lenq, 2*mmsize |
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jl .loop |
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REP_RET |
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%endmacro |
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INIT_XMM sse2 |
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DITHER_INT_TO_FLOAT_RECTANGULAR |
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INIT_YMM avx |
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DITHER_INT_TO_FLOAT_RECTANGULAR |
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;------------------------------------------------------------------------------ |
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; void ff_dither_int_to_float_triangular(float *dst, int *src0, int len) |
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;------------------------------------------------------------------------------ |
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%macro DITHER_INT_TO_FLOAT_TRIANGULAR 0 |
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cglobal dither_int_to_float_triangular, 3,4,5, dst, src0, len, src1 |
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lea lenq, [4*lend] |
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lea src1q, [src0q+2*lenq] |
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add src0q, lenq |
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add dstq, lenq |
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neg lenq |
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mova m0, [pf_dither_scale] |
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.loop: |
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cvtdq2ps m1, [src0q+lenq] |
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cvtdq2ps m2, [src0q+lenq+mmsize] |
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cvtdq2ps m3, [src1q+lenq] |
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cvtdq2ps m4, [src1q+lenq+mmsize] |
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addps m1, m1, m3 |
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addps m2, m2, m4 |
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mulps m1, m1, m0 |
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mulps m2, m2, m0 |
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mova [dstq+lenq], m1 |
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mova [dstq+lenq+mmsize], m2 |
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add lenq, 2*mmsize |
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jl .loop |
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REP_RET |
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%endmacro |
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INIT_XMM sse2 |
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DITHER_INT_TO_FLOAT_TRIANGULAR |
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INIT_YMM avx |
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DITHER_INT_TO_FLOAT_TRIANGULAR
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