GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mpegvideodsp.c Lines: 5 62 8.1 %
Date: 2019-11-18 18:00:01 Branches: 0 12 0.0 %

Line Branch Exec Source
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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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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "mpegvideodsp.h"
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static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
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                   int x16, int y16, int rounder)
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{
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    const int A = (16 - x16) * (16 - y16);
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    const int B = (x16)      * (16 - y16);
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    const int C = (16 - x16) * (y16);
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    const int D = (x16)      * (y16);
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    int i;
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    for (i = 0; i < h; i++) {
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        dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8;
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        dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8;
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        dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8;
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        dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8;
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        dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8;
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        dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8;
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        dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8;
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        dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8;
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        dst   += stride;
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        src   += stride;
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    }
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}
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void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
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              int dxx, int dxy, int dyx, int dyy, int shift, int r,
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              int width, int height)
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{
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    int y, vx, vy;
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    const int s = 1 << shift;
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    width--;
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    height--;
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    for (y = 0; y < h; y++) {
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        int x;
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        vx = ox;
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        vy = oy;
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        for (x = 0; x < 8; x++) { // FIXME: optimize
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            int index;
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            int src_x  = vx >> 16;
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            int src_y  = vy >> 16;
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            int frac_x = src_x & (s - 1);
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            int frac_y = src_y & (s - 1);
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            src_x >>= shift;
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            src_y >>= shift;
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            if ((unsigned) src_x < width) {
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                if ((unsigned) src_y < height) {
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                    index = src_x + src_y * stride;
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                    dst[y * stride + x] =
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                        ((src[index]                        * (s - frac_x) +
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                          src[index + 1]          * frac_x) * (s - frac_y) +
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                         (src[index + stride]               * (s - frac_x) +
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                          src[index + stride + 1] * frac_x) *      frac_y  +
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                         r) >> (shift * 2);
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                } else {
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                    index = src_x + av_clip(src_y, 0, height) * stride;
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                    dst[y * stride + x] =
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                        ((src[index]               * (s - frac_x) +
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                          src[index + 1] * frac_x) *  s           +
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                         r) >> (shift * 2);
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                }
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            } else {
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                if ((unsigned) src_y < height) {
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                    index = av_clip(src_x, 0, width) + src_y * stride;
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                    dst[y * stride + x] =
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                        ((src[index]                    * (s - frac_y) +
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                          src[index + stride] * frac_y) *  s           +
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                         r) >> (shift * 2);
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                } else {
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                    index = av_clip(src_x, 0, width) +
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                            av_clip(src_y, 0, height) * stride;
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                    dst[y * stride + x] = src[index];
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                }
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            }
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            vx += dxx;
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            vy += dyx;
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        }
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        ox += dxy;
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        oy += dyy;
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    }
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}
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av_cold void ff_mpegvideodsp_init(MpegVideoDSPContext *c)
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{
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    c->gmc1 = gmc1_c;
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    c->gmc  = ff_gmc_c;
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    if (ARCH_PPC)
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        ff_mpegvideodsp_init_ppc(c);
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    if (ARCH_X86)
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        ff_mpegvideodsp_init_x86(c);
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}