mirror of
https://git.videolan.org/git/ffmpeg.git
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97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/*
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*
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* Original MPlayer filters by Richard Felker.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* FFmpeg 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/mem.h"
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#include "libavutil/x86/asm.h"
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#include "libavfilter/vf_eq.h"
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#if HAVE_MMX_INLINE && HAVE_6REGS
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static void process_MMX(EQParameters *param, uint8_t *dst, int dst_stride,
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const uint8_t *src, int src_stride, int w, int h)
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{
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int i;
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int pel;
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int dstep = dst_stride - w;
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int sstep = src_stride - w;
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short brvec[4];
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short contvec[4];
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int contrast = (int) (param->contrast * 256 * 16);
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int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32;
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brvec[0] = brvec[1] = brvec[2] = brvec[3] = brightness;
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contvec[0] = contvec[1] = contvec[2] = contvec[3] = contrast;
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while (h--) {
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__asm__ volatile (
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"movq (%5), %%mm3 \n\t"
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"movq (%6), %%mm4 \n\t"
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"pxor %%mm0, %%mm0 \n\t"
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"movl %4, %%eax \n\t"
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".p2align 4 \n\t"
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"1: \n\t"
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"movq (%0), %%mm1 \n\t"
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"movq (%0), %%mm2 \n\t"
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"punpcklbw %%mm0, %%mm1\n\t"
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"punpckhbw %%mm0, %%mm2\n\t"
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"psllw $4, %%mm1 \n\t"
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"psllw $4, %%mm2 \n\t"
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"pmulhw %%mm4, %%mm1 \n\t"
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"pmulhw %%mm4, %%mm2 \n\t"
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"paddw %%mm3, %%mm1 \n\t"
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"paddw %%mm3, %%mm2 \n\t"
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"packuswb %%mm2, %%mm1 \n\t"
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"add $8, %0 \n\t"
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"movq %%mm1, (%1) \n\t"
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"add $8, %1 \n\t"
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"decl %%eax \n\t"
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"jnz 1b \n\t"
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: "=r" (src), "=r" (dst)
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: "0" (src), "1" (dst), "r" (w>>3), "r" (brvec), "r" (contvec)
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: "%eax"
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);
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for (i = w&7; i; i--) {
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pel = ((*src++ * contrast) >> 12) + brightness;
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if (pel & ~255)
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pel = (-pel) >> 31;
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*dst++ = pel;
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}
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src += sstep;
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dst += dstep;
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}
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__asm__ volatile ( "emms \n\t" ::: "memory" );
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}
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#endif
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av_cold void ff_eq_init_x86(EQContext *eq)
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{
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#if HAVE_MMX_INLINE && HAVE_6REGS
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int cpu_flags = av_get_cpu_flags();
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if (cpu_flags & AV_CPU_FLAG_MMX) {
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eq->process = process_MMX;
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}
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#endif
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}
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