GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/h261.c Lines: 14 36 38.9 %
Date: 2019-11-18 18:00:01 Branches: 3 14 21.4 %

Line Branch Exec Source
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/*
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 * H.261 common code
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 * Copyright (c) 2004 Maarten Daniels
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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
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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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 * 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 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 FFmpeg; 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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 * H.261 codec
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 */
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#include "avcodec.h"
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#include "h261.h"
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#define IS_FIL(a)    ((a) & MB_TYPE_H261_FIL)
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uint8_t ff_h261_rl_table_store[2][2 * MAX_RUN + MAX_LEVEL + 3];
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static void h261_loop_filter(uint8_t *src, int stride)
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{
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    int x, y, xy, yz;
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    int temp[64];
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    for (x = 0; x < 8; x++) {
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        temp[x]         = 4 * src[x];
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        temp[x + 7 * 8] = 4 * src[x + 7 * stride];
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    }
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    for (y = 1; y < 7; y++) {
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        for (x = 0; x < 8; x++) {
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            xy       = y * stride + x;
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            yz       = y * 8      + x;
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            temp[yz] = src[xy - stride] + 2 * src[xy] + src[xy + stride];
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        }
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    }
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    for (y = 0; y < 8; y++) {
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        src[y * stride]     = (temp[y * 8]     + 2) >> 2;
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        src[y * stride + 7] = (temp[y * 8 + 7] + 2) >> 2;
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        for (x = 1; x < 7; x++) {
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            xy      = y * stride + x;
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            yz      = y * 8      + x;
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            src[xy] = (temp[yz - 1] + 2 * temp[yz] + temp[yz + 1] + 8) >> 4;
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        }
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    }
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}
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205957
void ff_h261_loop_filter(MpegEncContext *s)
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{
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205957
    H261Context *h       = (H261Context *)s;
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205957
    const int linesize   = s->linesize;
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205957
    const int uvlinesize = s->uvlinesize;
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205957
    uint8_t *dest_y      = s->dest[0];
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205957
    uint8_t *dest_cb     = s->dest[1];
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    uint8_t *dest_cr     = s->dest[2];
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    if (!(IS_FIL(h->mtype)))
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205957
        return;
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    h261_loop_filter(dest_y,                    linesize);
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    h261_loop_filter(dest_y + 8,                linesize);
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    h261_loop_filter(dest_y + 8 * linesize,     linesize);
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    h261_loop_filter(dest_y + 8 * linesize + 8, linesize);
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    h261_loop_filter(dest_cb, uvlinesize);
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    h261_loop_filter(dest_cr, uvlinesize);
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}
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av_cold void ff_h261_common_init(void)
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{
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    static int done = 0;
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    if (done)
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        return;
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    ff_rl_init(&ff_h261_rl_tcoeff, ff_h261_rl_table_store);
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    done = 1;
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}