mirror of
https://github.com/FFmpeg/FFmpeg.git
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531 lines
16 KiB
C
531 lines
16 KiB
C
/*
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* Copyright (C) 2010 David Conrad
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* Copyright (C) 2010 Ronald S. Bultje
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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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/**
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* @file
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* VP8 compatible video decoder
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*/
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#include "dsputil.h"
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#include "vp8dsp.h"
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#include "libavutil/common.h"
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// TODO: Maybe add dequant
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static void vp8_luma_dc_wht_c(DCTELEM block[4][4][16], DCTELEM dc[16])
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{
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int i, t0, t1, t2, t3;
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for (i = 0; i < 4; i++) {
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t0 = dc[0*4+i] + dc[3*4+i];
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t1 = dc[1*4+i] + dc[2*4+i];
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t2 = dc[1*4+i] - dc[2*4+i];
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t3 = dc[0*4+i] - dc[3*4+i];
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dc[0*4+i] = t0 + t1;
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dc[1*4+i] = t3 + t2;
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dc[2*4+i] = t0 - t1;
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dc[3*4+i] = t3 - t2;
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}
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for (i = 0; i < 4; i++) {
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t0 = dc[i*4+0] + dc[i*4+3] + 3; // rounding
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t1 = dc[i*4+1] + dc[i*4+2];
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t2 = dc[i*4+1] - dc[i*4+2];
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t3 = dc[i*4+0] - dc[i*4+3] + 3; // rounding
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dc[i*4+0] = 0;
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dc[i*4+1] = 0;
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dc[i*4+2] = 0;
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dc[i*4+3] = 0;
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block[i][0][0] = (t0 + t1) >> 3;
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block[i][1][0] = (t3 + t2) >> 3;
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block[i][2][0] = (t0 - t1) >> 3;
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block[i][3][0] = (t3 - t2) >> 3;
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}
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}
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static void vp8_luma_dc_wht_dc_c(DCTELEM block[4][4][16], DCTELEM dc[16])
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{
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int i, val = (dc[0] + 3) >> 3;
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dc[0] = 0;
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for (i = 0; i < 4; i++) {
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block[i][0][0] = val;
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block[i][1][0] = val;
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block[i][2][0] = val;
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block[i][3][0] = val;
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}
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}
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#define MUL_20091(a) ((((a)*20091) >> 16) + (a))
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#define MUL_35468(a) (((a)*35468) >> 16)
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static void vp8_idct_add_c(uint8_t *dst, DCTELEM block[16], ptrdiff_t stride)
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{
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int i, t0, t1, t2, t3;
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DCTELEM tmp[16];
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for (i = 0; i < 4; i++) {
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t0 = block[0*4+i] + block[2*4+i];
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t1 = block[0*4+i] - block[2*4+i];
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t2 = MUL_35468(block[1*4+i]) - MUL_20091(block[3*4+i]);
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t3 = MUL_20091(block[1*4+i]) + MUL_35468(block[3*4+i]);
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block[0*4+i] = 0;
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block[1*4+i] = 0;
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block[2*4+i] = 0;
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block[3*4+i] = 0;
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tmp[i*4+0] = t0 + t3;
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tmp[i*4+1] = t1 + t2;
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tmp[i*4+2] = t1 - t2;
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tmp[i*4+3] = t0 - t3;
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}
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for (i = 0; i < 4; i++) {
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t0 = tmp[0*4+i] + tmp[2*4+i];
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t1 = tmp[0*4+i] - tmp[2*4+i];
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t2 = MUL_35468(tmp[1*4+i]) - MUL_20091(tmp[3*4+i]);
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t3 = MUL_20091(tmp[1*4+i]) + MUL_35468(tmp[3*4+i]);
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dst[0] = av_clip_uint8(dst[0] + ((t0 + t3 + 4) >> 3));
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dst[1] = av_clip_uint8(dst[1] + ((t1 + t2 + 4) >> 3));
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dst[2] = av_clip_uint8(dst[2] + ((t1 - t2 + 4) >> 3));
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dst[3] = av_clip_uint8(dst[3] + ((t0 - t3 + 4) >> 3));
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dst += stride;
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}
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}
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static void vp8_idct_dc_add_c(uint8_t *dst, DCTELEM block[16], ptrdiff_t stride)
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{
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int i, dc = (block[0] + 4) >> 3;
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block[0] = 0;
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for (i = 0; i < 4; i++) {
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dst[0] = av_clip_uint8(dst[0] + dc);
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dst[1] = av_clip_uint8(dst[1] + dc);
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dst[2] = av_clip_uint8(dst[2] + dc);
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dst[3] = av_clip_uint8(dst[3] + dc);
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dst += stride;
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}
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}
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static void vp8_idct_dc_add4uv_c(uint8_t *dst, DCTELEM block[4][16], ptrdiff_t stride)
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{
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vp8_idct_dc_add_c(dst+stride*0+0, block[0], stride);
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vp8_idct_dc_add_c(dst+stride*0+4, block[1], stride);
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vp8_idct_dc_add_c(dst+stride*4+0, block[2], stride);
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vp8_idct_dc_add_c(dst+stride*4+4, block[3], stride);
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}
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static void vp8_idct_dc_add4y_c(uint8_t *dst, DCTELEM block[4][16], ptrdiff_t stride)
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{
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vp8_idct_dc_add_c(dst+ 0, block[0], stride);
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vp8_idct_dc_add_c(dst+ 4, block[1], stride);
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vp8_idct_dc_add_c(dst+ 8, block[2], stride);
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vp8_idct_dc_add_c(dst+12, block[3], stride);
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}
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// because I like only having two parameters to pass functions...
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#define LOAD_PIXELS\
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int av_unused p3 = p[-4*stride];\
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int av_unused p2 = p[-3*stride];\
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int av_unused p1 = p[-2*stride];\
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int av_unused p0 = p[-1*stride];\
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int av_unused q0 = p[ 0*stride];\
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int av_unused q1 = p[ 1*stride];\
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int av_unused q2 = p[ 2*stride];\
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int av_unused q3 = p[ 3*stride];
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#define clip_int8(n) (cm[n+0x80]-0x80)
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static av_always_inline void filter_common(uint8_t *p, ptrdiff_t stride, int is4tap)
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{
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LOAD_PIXELS
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int a, f1, f2;
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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a = 3*(q0 - p0);
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if (is4tap)
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a += clip_int8(p1 - q1);
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a = clip_int8(a);
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// We deviate from the spec here with c(a+3) >> 3
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// since that's what libvpx does.
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f1 = FFMIN(a+4, 127) >> 3;
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f2 = FFMIN(a+3, 127) >> 3;
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// Despite what the spec says, we do need to clamp here to
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// be bitexact with libvpx.
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p[-1*stride] = cm[p0 + f2];
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p[ 0*stride] = cm[q0 - f1];
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// only used for _inner on blocks without high edge variance
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if (!is4tap) {
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a = (f1+1)>>1;
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p[-2*stride] = cm[p1 + a];
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p[ 1*stride] = cm[q1 - a];
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}
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}
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static av_always_inline int simple_limit(uint8_t *p, ptrdiff_t stride, int flim)
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{
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LOAD_PIXELS
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return 2*FFABS(p0-q0) + (FFABS(p1-q1) >> 1) <= flim;
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}
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/**
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* E - limit at the macroblock edge
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* I - limit for interior difference
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*/
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static av_always_inline int normal_limit(uint8_t *p, ptrdiff_t stride, int E, int I)
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{
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LOAD_PIXELS
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return simple_limit(p, stride, E)
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&& FFABS(p3-p2) <= I && FFABS(p2-p1) <= I && FFABS(p1-p0) <= I
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&& FFABS(q3-q2) <= I && FFABS(q2-q1) <= I && FFABS(q1-q0) <= I;
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}
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// high edge variance
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static av_always_inline int hev(uint8_t *p, ptrdiff_t stride, int thresh)
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{
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LOAD_PIXELS
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return FFABS(p1-p0) > thresh || FFABS(q1-q0) > thresh;
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}
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static av_always_inline void filter_mbedge(uint8_t *p, ptrdiff_t stride)
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{
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int a0, a1, a2, w;
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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LOAD_PIXELS
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w = clip_int8(p1-q1);
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w = clip_int8(w + 3*(q0-p0));
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a0 = (27*w + 63) >> 7;
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a1 = (18*w + 63) >> 7;
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a2 = ( 9*w + 63) >> 7;
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p[-3*stride] = cm[p2 + a2];
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p[-2*stride] = cm[p1 + a1];
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p[-1*stride] = cm[p0 + a0];
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p[ 0*stride] = cm[q0 - a0];
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p[ 1*stride] = cm[q1 - a1];
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p[ 2*stride] = cm[q2 - a2];
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}
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#define LOOP_FILTER(dir, size, stridea, strideb, maybe_inline) \
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static maybe_inline void vp8_ ## dir ## _loop_filter ## size ## _c(uint8_t *dst, ptrdiff_t stride,\
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int flim_E, int flim_I, int hev_thresh)\
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{\
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int i;\
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\
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for (i = 0; i < size; i++)\
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if (normal_limit(dst+i*stridea, strideb, flim_E, flim_I)) {\
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if (hev(dst+i*stridea, strideb, hev_thresh))\
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filter_common(dst+i*stridea, strideb, 1);\
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else\
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filter_mbedge(dst+i*stridea, strideb);\
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}\
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}\
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\
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static maybe_inline void vp8_ ## dir ## _loop_filter ## size ## _inner_c(uint8_t *dst, ptrdiff_t stride,\
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int flim_E, int flim_I, int hev_thresh)\
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{\
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int i;\
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\
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for (i = 0; i < size; i++)\
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if (normal_limit(dst+i*stridea, strideb, flim_E, flim_I)) {\
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int hv = hev(dst+i*stridea, strideb, hev_thresh);\
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if (hv) \
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filter_common(dst+i*stridea, strideb, 1);\
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else \
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filter_common(dst+i*stridea, strideb, 0);\
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}\
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}
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LOOP_FILTER(v, 16, 1, stride,)
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LOOP_FILTER(h, 16, stride, 1,)
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#define UV_LOOP_FILTER(dir, stridea, strideb) \
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LOOP_FILTER(dir, 8, stridea, strideb, av_always_inline) \
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static void vp8_ ## dir ## _loop_filter8uv_c(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,\
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int fE, int fI, int hev_thresh)\
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{\
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vp8_ ## dir ## _loop_filter8_c(dstU, stride, fE, fI, hev_thresh);\
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vp8_ ## dir ## _loop_filter8_c(dstV, stride, fE, fI, hev_thresh);\
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}\
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static void vp8_ ## dir ## _loop_filter8uv_inner_c(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,\
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int fE, int fI, int hev_thresh)\
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{\
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vp8_ ## dir ## _loop_filter8_inner_c(dstU, stride, fE, fI, hev_thresh);\
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vp8_ ## dir ## _loop_filter8_inner_c(dstV, stride, fE, fI, hev_thresh);\
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}
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UV_LOOP_FILTER(v, 1, stride)
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UV_LOOP_FILTER(h, stride, 1)
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static void vp8_v_loop_filter_simple_c(uint8_t *dst, ptrdiff_t stride, int flim)
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{
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int i;
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for (i = 0; i < 16; i++)
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if (simple_limit(dst+i, stride, flim))
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filter_common(dst+i, stride, 1);
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}
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static void vp8_h_loop_filter_simple_c(uint8_t *dst, ptrdiff_t stride, int flim)
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{
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int i;
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for (i = 0; i < 16; i++)
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if (simple_limit(dst+i*stride, 1, flim))
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filter_common(dst+i*stride, 1, 1);
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}
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static const uint8_t subpel_filters[7][6] = {
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{ 0, 6, 123, 12, 1, 0 },
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{ 2, 11, 108, 36, 8, 1 },
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{ 0, 9, 93, 50, 6, 0 },
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{ 3, 16, 77, 77, 16, 3 },
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{ 0, 6, 50, 93, 9, 0 },
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{ 1, 8, 36, 108, 11, 2 },
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{ 0, 1, 12, 123, 6, 0 },
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};
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#define PUT_PIXELS(WIDTH) \
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static void put_vp8_pixels ## WIDTH ##_c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int x, int y) { \
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int i; \
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for (i = 0; i < h; i++, dst+= dststride, src+= srcstride) { \
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memcpy(dst, src, WIDTH); \
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} \
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}
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PUT_PIXELS(16)
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PUT_PIXELS(8)
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PUT_PIXELS(4)
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#define FILTER_6TAP(src, F, stride) \
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cm[(F[2]*src[x+0*stride] - F[1]*src[x-1*stride] + F[0]*src[x-2*stride] + \
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F[3]*src[x+1*stride] - F[4]*src[x+2*stride] + F[5]*src[x+3*stride] + 64) >> 7]
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#define FILTER_4TAP(src, F, stride) \
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cm[(F[2]*src[x+0*stride] - F[1]*src[x-1*stride] + \
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F[3]*src[x+1*stride] - F[4]*src[x+2*stride] + 64) >> 7]
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#define VP8_EPEL_H(SIZE, TAPS) \
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static void put_vp8_epel ## SIZE ## _h ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
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{ \
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const uint8_t *filter = subpel_filters[mx-1]; \
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
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int x, y; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = FILTER_ ## TAPS ## TAP(src, filter, 1); \
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dst += dststride; \
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src += srcstride; \
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} \
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}
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#define VP8_EPEL_V(SIZE, TAPS) \
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static void put_vp8_epel ## SIZE ## _v ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
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{ \
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const uint8_t *filter = subpel_filters[my-1]; \
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
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int x, y; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = FILTER_ ## TAPS ## TAP(src, filter, srcstride); \
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dst += dststride; \
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src += srcstride; \
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} \
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}
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#define VP8_EPEL_HV(SIZE, HTAPS, VTAPS) \
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static void put_vp8_epel ## SIZE ## _h ## HTAPS ## v ## VTAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
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{ \
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const uint8_t *filter = subpel_filters[mx-1]; \
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
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int x, y; \
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uint8_t tmp_array[(2*SIZE+VTAPS-1)*SIZE]; \
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uint8_t *tmp = tmp_array; \
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src -= (2-(VTAPS==4))*srcstride; \
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\
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for (y = 0; y < h+VTAPS-1; y++) { \
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for (x = 0; x < SIZE; x++) \
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tmp[x] = FILTER_ ## HTAPS ## TAP(src, filter, 1); \
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tmp += SIZE; \
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src += srcstride; \
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} \
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\
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tmp = tmp_array + (2-(VTAPS==4))*SIZE; \
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filter = subpel_filters[my-1]; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = FILTER_ ## VTAPS ## TAP(tmp, filter, SIZE); \
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dst += dststride; \
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tmp += SIZE; \
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} \
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}
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VP8_EPEL_H(16, 4)
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VP8_EPEL_H(8, 4)
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VP8_EPEL_H(4, 4)
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VP8_EPEL_H(16, 6)
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VP8_EPEL_H(8, 6)
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VP8_EPEL_H(4, 6)
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VP8_EPEL_V(16, 4)
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VP8_EPEL_V(8, 4)
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VP8_EPEL_V(4, 4)
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VP8_EPEL_V(16, 6)
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VP8_EPEL_V(8, 6)
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VP8_EPEL_V(4, 6)
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VP8_EPEL_HV(16, 4, 4)
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VP8_EPEL_HV(8, 4, 4)
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VP8_EPEL_HV(4, 4, 4)
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VP8_EPEL_HV(16, 4, 6)
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VP8_EPEL_HV(8, 4, 6)
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VP8_EPEL_HV(4, 4, 6)
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VP8_EPEL_HV(16, 6, 4)
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VP8_EPEL_HV(8, 6, 4)
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VP8_EPEL_HV(4, 6, 4)
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VP8_EPEL_HV(16, 6, 6)
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VP8_EPEL_HV(8, 6, 6)
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VP8_EPEL_HV(4, 6, 6)
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#define VP8_BILINEAR(SIZE) \
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static void put_vp8_bilinear ## SIZE ## _h_c(uint8_t *dst, ptrdiff_t stride, uint8_t *src, ptrdiff_t s2, int h, int mx, int my) \
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{ \
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int a = 8-mx, b = mx; \
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int x, y; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = (a*src[x] + b*src[x+1] + 4) >> 3; \
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dst += stride; \
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src += stride; \
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} \
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} \
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static void put_vp8_bilinear ## SIZE ## _v_c(uint8_t *dst, ptrdiff_t stride, uint8_t *src, ptrdiff_t s2, int h, int mx, int my) \
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{ \
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int c = 8-my, d = my; \
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int x, y; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = (c*src[x] + d*src[x+stride] + 4) >> 3; \
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dst += stride; \
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src += stride; \
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} \
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} \
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\
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static void put_vp8_bilinear ## SIZE ## _hv_c(uint8_t *dst, ptrdiff_t stride, uint8_t *src, ptrdiff_t s2, int h, int mx, int my) \
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{ \
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int a = 8-mx, b = mx; \
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int c = 8-my, d = my; \
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int x, y; \
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uint8_t tmp_array[(2*SIZE+1)*SIZE]; \
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uint8_t *tmp = tmp_array; \
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\
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for (y = 0; y < h+1; y++) { \
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for (x = 0; x < SIZE; x++) \
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tmp[x] = (a*src[x] + b*src[x+1] + 4) >> 3; \
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tmp += SIZE; \
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src += stride; \
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} \
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\
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tmp = tmp_array; \
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\
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for (y = 0; y < h; y++) { \
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for (x = 0; x < SIZE; x++) \
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dst[x] = (c*tmp[x] + d*tmp[x+SIZE] + 4) >> 3; \
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dst += stride; \
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tmp += SIZE; \
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} \
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}
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VP8_BILINEAR(16)
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VP8_BILINEAR(8)
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VP8_BILINEAR(4)
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#define VP8_MC_FUNC(IDX, SIZE) \
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dsp->put_vp8_epel_pixels_tab[IDX][0][0] = put_vp8_pixels ## SIZE ## _c; \
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dsp->put_vp8_epel_pixels_tab[IDX][0][1] = put_vp8_epel ## SIZE ## _h4_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][0][2] = put_vp8_epel ## SIZE ## _h6_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][1][0] = put_vp8_epel ## SIZE ## _v4_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][1][1] = put_vp8_epel ## SIZE ## _h4v4_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][1][2] = put_vp8_epel ## SIZE ## _h6v4_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][2][0] = put_vp8_epel ## SIZE ## _v6_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][2][1] = put_vp8_epel ## SIZE ## _h4v6_c; \
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dsp->put_vp8_epel_pixels_tab[IDX][2][2] = put_vp8_epel ## SIZE ## _h6v6_c
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#define VP8_BILINEAR_MC_FUNC(IDX, SIZE) \
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dsp->put_vp8_bilinear_pixels_tab[IDX][0][0] = put_vp8_pixels ## SIZE ## _c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][0][1] = put_vp8_bilinear ## SIZE ## _h_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][0][2] = put_vp8_bilinear ## SIZE ## _h_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][1][0] = put_vp8_bilinear ## SIZE ## _v_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][1][1] = put_vp8_bilinear ## SIZE ## _hv_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][1][2] = put_vp8_bilinear ## SIZE ## _hv_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][2][0] = put_vp8_bilinear ## SIZE ## _v_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][2][1] = put_vp8_bilinear ## SIZE ## _hv_c; \
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dsp->put_vp8_bilinear_pixels_tab[IDX][2][2] = put_vp8_bilinear ## SIZE ## _hv_c
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av_cold void ff_vp8dsp_init(VP8DSPContext *dsp)
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{
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dsp->vp8_luma_dc_wht = vp8_luma_dc_wht_c;
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dsp->vp8_luma_dc_wht_dc = vp8_luma_dc_wht_dc_c;
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dsp->vp8_idct_add = vp8_idct_add_c;
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dsp->vp8_idct_dc_add = vp8_idct_dc_add_c;
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dsp->vp8_idct_dc_add4y = vp8_idct_dc_add4y_c;
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dsp->vp8_idct_dc_add4uv = vp8_idct_dc_add4uv_c;
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dsp->vp8_v_loop_filter16y = vp8_v_loop_filter16_c;
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dsp->vp8_h_loop_filter16y = vp8_h_loop_filter16_c;
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dsp->vp8_v_loop_filter8uv = vp8_v_loop_filter8uv_c;
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dsp->vp8_h_loop_filter8uv = vp8_h_loop_filter8uv_c;
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dsp->vp8_v_loop_filter16y_inner = vp8_v_loop_filter16_inner_c;
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dsp->vp8_h_loop_filter16y_inner = vp8_h_loop_filter16_inner_c;
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dsp->vp8_v_loop_filter8uv_inner = vp8_v_loop_filter8uv_inner_c;
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dsp->vp8_h_loop_filter8uv_inner = vp8_h_loop_filter8uv_inner_c;
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dsp->vp8_v_loop_filter_simple = vp8_v_loop_filter_simple_c;
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dsp->vp8_h_loop_filter_simple = vp8_h_loop_filter_simple_c;
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VP8_MC_FUNC(0, 16);
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VP8_MC_FUNC(1, 8);
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VP8_MC_FUNC(2, 4);
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VP8_BILINEAR_MC_FUNC(0, 16);
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VP8_BILINEAR_MC_FUNC(1, 8);
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VP8_BILINEAR_MC_FUNC(2, 4);
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if (ARCH_X86)
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ff_vp8dsp_init_x86(dsp);
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if (HAVE_ALTIVEC)
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ff_vp8dsp_init_altivec(dsp);
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if (ARCH_ARM)
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ff_vp8dsp_init_arm(dsp);
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}
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