mirror of
https://git.ffmpeg.org/ffmpeg.git
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144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/*
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* Copyright (C) 2003 Mike Melanson
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* Copyright (C) 2003 Dr. Tim Ferguson
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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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* id RoQ Video common functions based on work by Dr. Tim Ferguson
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*/
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#include "avcodec.h"
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#include "roqvideo.h"
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static inline void block_copy(unsigned char *out, unsigned char *in,
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int outstride, int instride, int sz)
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{
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int rows = sz;
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while(rows--) {
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memcpy(out, in, sz);
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out += outstride;
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in += instride;
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}
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}
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void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
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{
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unsigned char *bptr;
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int boffs,stride;
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stride = ri->current_frame->linesize[0];
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boffs = y*stride + x;
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bptr = ri->current_frame->data[0] + boffs;
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bptr[0 ] = cell->y[0];
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bptr[1 ] = cell->y[1];
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bptr[stride ] = cell->y[2];
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bptr[stride+1] = cell->y[3];
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stride = ri->current_frame->linesize[1];
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boffs = y*stride + x;
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bptr = ri->current_frame->data[1] + boffs;
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bptr[0 ] =
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bptr[1 ] =
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bptr[stride ] =
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bptr[stride+1] = cell->u;
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bptr = ri->current_frame->data[2] + boffs;
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bptr[0 ] =
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bptr[1 ] =
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bptr[stride ] =
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bptr[stride+1] = cell->v;
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}
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void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
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{
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unsigned char *bptr;
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int boffs,stride;
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stride = ri->current_frame->linesize[0];
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boffs = y*stride + x;
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bptr = ri->current_frame->data[0] + boffs;
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bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = cell->y[0];
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bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = cell->y[1];
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bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = cell->y[2];
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bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3];
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stride = ri->current_frame->linesize[1];
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boffs = y*stride + x;
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bptr = ri->current_frame->data[1] + boffs;
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bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
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bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
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bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
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bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->u;
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bptr = ri->current_frame->data[2] + boffs;
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bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
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bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
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bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
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bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->v;
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}
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static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax,
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int deltay, int sz)
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{
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int mx, my, cp;
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mx = x + deltax;
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my = y + deltay;
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/* check MV against frame boundaries */
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if ((mx < 0) || (mx > ri->width - sz) ||
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(my < 0) || (my > ri->height - sz)) {
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av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
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mx, my, ri->width, ri->height);
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return;
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}
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if (!ri->last_frame->data[0]) {
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av_log(ri->avctx, AV_LOG_ERROR, "Invalid decode type. Invalid header?\n");
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return;
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}
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for(cp = 0; cp < 3; cp++) {
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int outstride = ri->current_frame->linesize[cp];
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int instride = ri->last_frame ->linesize[cp];
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block_copy(ri->current_frame->data[cp] + y*outstride + x,
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ri->last_frame->data[cp] + my*instride + mx,
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outstride, instride, sz);
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}
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}
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void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
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int deltax, int deltay)
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{
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apply_motion_generic(ri, x, y, deltax, deltay, 4);
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}
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void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
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int deltax, int deltay)
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{
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apply_motion_generic(ri, x, y, deltax, deltay, 8);
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}
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