| /* |
| * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> |
| * Copyright (c) 2013 Paul B Mahol |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/x86/cpu.h" |
| #include "libavutil/x86/asm.h" |
| #include "libavfilter/vf_noise.h" |
| |
| #if HAVE_INLINE_ASM |
| static void line_noise_mmx(uint8_t *dst, const uint8_t *src, |
| const int8_t *noise, int len, int shift) |
| { |
| x86_reg mmx_len= len & (~7); |
| noise += shift; |
| |
| __asm__ volatile( |
| "mov %3, %%"REG_a" \n\t" |
| "pcmpeqb %%mm7, %%mm7 \n\t" |
| "psllw $15, %%mm7 \n\t" |
| "packsswb %%mm7, %%mm7 \n\t" |
| ".p2align 4 \n\t" |
| "1: \n\t" |
| "movq (%0, %%"REG_a"), %%mm0 \n\t" |
| "movq (%1, %%"REG_a"), %%mm1 \n\t" |
| "pxor %%mm7, %%mm0 \n\t" |
| "paddsb %%mm1, %%mm0 \n\t" |
| "pxor %%mm7, %%mm0 \n\t" |
| "movq %%mm0, (%2, %%"REG_a") \n\t" |
| "add $8, %%"REG_a" \n\t" |
| " js 1b \n\t" |
| :: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len) |
| : "%"REG_a |
| ); |
| if (mmx_len != len) |
| ff_line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0); |
| } |
| |
| #if HAVE_6REGS |
| static void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src, |
| int len, const int8_t * const *shift) |
| { |
| x86_reg mmx_len = len & (~7); |
| |
| __asm__ volatile( |
| "mov %5, %%"REG_a" \n\t" |
| ".p2align 4 \n\t" |
| "1: \n\t" |
| "movq (%1, %%"REG_a"), %%mm1 \n\t" |
| "movq (%0, %%"REG_a"), %%mm0 \n\t" |
| "paddb (%2, %%"REG_a"), %%mm1 \n\t" |
| "paddb (%3, %%"REG_a"), %%mm1 \n\t" |
| "movq %%mm0, %%mm2 \n\t" |
| "movq %%mm1, %%mm3 \n\t" |
| "punpcklbw %%mm0, %%mm0 \n\t" |
| "punpckhbw %%mm2, %%mm2 \n\t" |
| "punpcklbw %%mm1, %%mm1 \n\t" |
| "punpckhbw %%mm3, %%mm3 \n\t" |
| "pmulhw %%mm0, %%mm1 \n\t" |
| "pmulhw %%mm2, %%mm3 \n\t" |
| "paddw %%mm1, %%mm1 \n\t" |
| "paddw %%mm3, %%mm3 \n\t" |
| "paddw %%mm0, %%mm1 \n\t" |
| "paddw %%mm2, %%mm3 \n\t" |
| "psrlw $8, %%mm1 \n\t" |
| "psrlw $8, %%mm3 \n\t" |
| "packuswb %%mm3, %%mm1 \n\t" |
| "movq %%mm1, (%4, %%"REG_a") \n\t" |
| "add $8, %%"REG_a" \n\t" |
| " js 1b \n\t" |
| :: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len), |
| "r" (dst+mmx_len), "g" (-mmx_len) |
| : "%"REG_a |
| ); |
| |
| if (mmx_len != len){ |
| const int8_t *shift2[3] = { shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len }; |
| ff_line_noise_avg_c(dst+mmx_len, src+mmx_len, len-mmx_len, shift2); |
| } |
| } |
| #endif /* HAVE_6REGS */ |
| |
| static void line_noise_mmxext(uint8_t *dst, const uint8_t *src, |
| const int8_t *noise, int len, int shift) |
| { |
| x86_reg mmx_len = len & (~7); |
| noise += shift; |
| |
| __asm__ volatile( |
| "mov %3, %%"REG_a" \n\t" |
| "pcmpeqb %%mm7, %%mm7 \n\t" |
| "psllw $15, %%mm7 \n\t" |
| "packsswb %%mm7, %%mm7 \n\t" |
| ".p2align 4 \n\t" |
| "1: \n\t" |
| "movq (%0, %%"REG_a"), %%mm0 \n\t" |
| "movq (%1, %%"REG_a"), %%mm1 \n\t" |
| "pxor %%mm7, %%mm0 \n\t" |
| "paddsb %%mm1, %%mm0 \n\t" |
| "pxor %%mm7, %%mm0 \n\t" |
| "movntq %%mm0, (%2, %%"REG_a") \n\t" |
| "add $8, %%"REG_a" \n\t" |
| " js 1b \n\t" |
| :: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len) |
| : "%"REG_a |
| ); |
| if (mmx_len != len) |
| ff_line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0); |
| } |
| #endif /* HAVE_INLINE_ASM */ |
| |
| av_cold void ff_noise_init_x86(NoiseContext *n) |
| { |
| #if HAVE_INLINE_ASM |
| int cpu_flags = av_get_cpu_flags(); |
| |
| if (INLINE_MMX(cpu_flags)) { |
| n->line_noise = line_noise_mmx; |
| #if HAVE_6REGS |
| n->line_noise_avg = line_noise_avg_mmx; |
| #endif |
| } |
| if (INLINE_MMXEXT(cpu_flags)) { |
| n->line_noise = line_noise_mmxext; |
| } |
| #endif |
| } |