mirror of https://github.com/FFmpeg/FFmpeg.git
Diego Biurrun
11 years ago
parent
86f910806b
commit
0338c39698
15 changed files with 210 additions and 118 deletions
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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 <stdint.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#include "config.h" |
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#include "h263dsp.h" |
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const uint8_t ff_h263_loop_filter_strength[32]={ |
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// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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0, 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9,10,10,10,11,11,11,12,12,12 |
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}; |
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static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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int y; |
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const int strength= ff_h263_loop_filter_strength[qscale]; |
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for(y=0; y<8; y++){ |
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int d1, d2, ad1; |
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int p0= src[y*stride-2]; |
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int p1= src[y*stride-1]; |
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int p2= src[y*stride+0]; |
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int p3= src[y*stride+1]; |
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int d = (p0 - p3 + 4*(p2 - p1)) / 8; |
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if (d<-2*strength) d1= 0; |
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else if(d<- strength) d1=-2*strength - d; |
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else if(d< strength) d1= d; |
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else if(d< 2*strength) d1= 2*strength - d; |
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else d1= 0; |
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p1 += d1; |
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p2 -= d1; |
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if(p1&256) p1= ~(p1>>31); |
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if(p2&256) p2= ~(p2>>31); |
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src[y*stride-1] = p1; |
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src[y*stride+0] = p2; |
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ad1= FFABS(d1)>>1; |
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d2= av_clip((p0-p3)/4, -ad1, ad1); |
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src[y*stride-2] = p0 - d2; |
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src[y*stride+1] = p3 + d2; |
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} |
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} |
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static void h263_v_loop_filter_c(uint8_t *src, int stride, int qscale){ |
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int x; |
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const int strength= ff_h263_loop_filter_strength[qscale]; |
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for(x=0; x<8; x++){ |
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int d1, d2, ad1; |
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int p0= src[x-2*stride]; |
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int p1= src[x-1*stride]; |
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int p2= src[x+0*stride]; |
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int p3= src[x+1*stride]; |
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int d = (p0 - p3 + 4*(p2 - p1)) / 8; |
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if (d<-2*strength) d1= 0; |
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else if(d<- strength) d1=-2*strength - d; |
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else if(d< strength) d1= d; |
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else if(d< 2*strength) d1= 2*strength - d; |
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else d1= 0; |
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p1 += d1; |
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p2 -= d1; |
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if(p1&256) p1= ~(p1>>31); |
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if(p2&256) p2= ~(p2>>31); |
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src[x-1*stride] = p1; |
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src[x+0*stride] = p2; |
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ad1= FFABS(d1)>>1; |
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d2= av_clip((p0-p3)/4, -ad1, ad1); |
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src[x-2*stride] = p0 - d2; |
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src[x+ stride] = p3 + d2; |
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} |
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} |
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av_cold void ff_h263dsp_init(H263DSPContext *ctx) |
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{ |
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ctx->h263_h_loop_filter = h263_h_loop_filter_c; |
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ctx->h263_v_loop_filter = h263_v_loop_filter_c; |
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if (ARCH_X86) |
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ff_h263dsp_init_x86(ctx); |
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} |
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@ -0,0 +1,34 @@ |
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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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#ifndef AVCODEC_H263DSP_H |
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#define AVCODEC_H263DSP_H |
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#include <stdint.h> |
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extern const uint8_t ff_h263_loop_filter_strength[32]; |
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typedef struct H263DSPContext { |
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void (*h263_h_loop_filter)(uint8_t *src, int stride, int qscale); |
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void (*h263_v_loop_filter)(uint8_t *src, int stride, int qscale); |
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} H263DSPContext; |
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void ff_h263dsp_init(H263DSPContext *ctx); |
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void ff_h263dsp_init_x86(H263DSPContext *ctx); |
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#endif /* AVCODEC_H263DSP_H */ |
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@ -0,0 +1,39 @@ |
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/*
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* Copyright (c) 2013 Diego Biurrun <diego@biurrun.de> |
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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 <stdint.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/x86/cpu.h" |
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#include "libavcodec/h263dsp.h" |
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void ff_h263_h_loop_filter_mmx(uint8_t *src, int stride, int qscale); |
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void ff_h263_v_loop_filter_mmx(uint8_t *src, int stride, int qscale); |
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av_cold void ff_h263dsp_init_x86(H263DSPContext *c) |
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{ |
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int cpu_flags = av_get_cpu_flags(); |
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if (EXTERNAL_MMX(cpu_flags)) { |
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c->h263_h_loop_filter = ff_h263_h_loop_filter_mmx; |
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c->h263_v_loop_filter = ff_h263_v_loop_filter_mmx; |
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} |
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} |
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