LCOV - code coverage report
Current view: top level - libavcodec - imgconvert.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 104 1.9 %
Date: 2017-12-17 16:07:53 Functions: 1 8 12.5 %

          Line data    Source code
       1             : /*
       2             :  * Misc image conversion routines
       3             :  * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * misc image conversion routines
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "internal.h"
      29             : #include "mathops.h"
      30             : #include "libavutil/avassert.h"
      31             : #include "libavutil/colorspace.h"
      32             : #include "libavutil/common.h"
      33             : #include "libavutil/pixdesc.h"
      34             : #include "libavutil/internal.h"
      35             : #include "libavutil/imgutils.h"
      36             : 
      37             : #if FF_API_GETCHROMA
      38           0 : void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
      39             : {
      40           0 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
      41           0 :     av_assert0(desc);
      42           0 :     *h_shift = desc->log2_chroma_w;
      43           0 :     *v_shift = desc->log2_chroma_h;
      44           0 : }
      45             : #endif
      46             : 
      47           0 : int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt,
      48             :                              enum AVPixelFormat src_pix_fmt,
      49             :                              int has_alpha)
      50             : {
      51           0 :     return av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
      52             : }
      53             : 
      54        1292 : enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
      55             :                                             enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
      56             : {
      57        1292 :     return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
      58             : }
      59             : 
      60           0 : enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
      61             :                                             enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
      62             : {
      63           0 :     return avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
      64             : }
      65             : 
      66           0 : enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
      67             :                                             enum AVPixelFormat src_pix_fmt,
      68             :                                             int has_alpha, int *loss_ptr){
      69             :     int i;
      70             : 
      71           0 :     enum AVPixelFormat best = AV_PIX_FMT_NONE;
      72             : 
      73           0 :     for(i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++)
      74           0 :         best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, loss_ptr);
      75             : 
      76           0 :     return best;
      77             : }
      78             : 
      79             : #if FF_API_AVPICTURE
      80             : FF_DISABLE_DEPRECATION_WARNINGS
      81             : /* return true if yuv planar */
      82           0 : static inline int is_yuv_planar(const AVPixFmtDescriptor *desc)
      83             : {
      84             :     int i;
      85           0 :     int planes[4] = { 0 };
      86             : 
      87           0 :     if (     desc->flags & AV_PIX_FMT_FLAG_RGB
      88           0 :         || !(desc->flags & AV_PIX_FMT_FLAG_PLANAR))
      89           0 :         return 0;
      90             : 
      91             :     /* set the used planes */
      92           0 :     for (i = 0; i < desc->nb_components; i++)
      93           0 :         planes[desc->comp[i].plane] = 1;
      94             : 
      95             :     /* if there is an unused plane, the format is not planar */
      96           0 :     for (i = 0; i < desc->nb_components; i++)
      97           0 :         if (!planes[i])
      98           0 :             return 0;
      99           0 :     return 1;
     100             : }
     101             : 
     102           0 : int av_picture_crop(AVPicture *dst, const AVPicture *src,
     103             :                     enum AVPixelFormat pix_fmt, int top_band, int left_band)
     104             : {
     105           0 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     106             :     int y_shift;
     107             :     int x_shift;
     108             :     int max_step[4];
     109             : 
     110           0 :     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
     111           0 :         return -1;
     112             : 
     113           0 :     y_shift = desc->log2_chroma_h;
     114           0 :     x_shift = desc->log2_chroma_w;
     115           0 :     av_image_fill_max_pixsteps(max_step, NULL, desc);
     116             : 
     117           0 :     if (is_yuv_planar(desc)) {
     118           0 :     dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
     119           0 :     dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
     120           0 :     dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
     121             :     } else{
     122           0 :         if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
     123           0 :             return -1;
     124           0 :         dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]);
     125             :     }
     126             : 
     127           0 :     dst->linesize[0] = src->linesize[0];
     128           0 :     dst->linesize[1] = src->linesize[1];
     129           0 :     dst->linesize[2] = src->linesize[2];
     130           0 :     return 0;
     131             : }
     132             : 
     133           0 : int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
     134             :                    enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
     135             :             int *color)
     136             : {
     137           0 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     138             :     uint8_t *optr;
     139             :     int y_shift;
     140             :     int x_shift;
     141             :     int yheight;
     142             :     int i, y;
     143             :     int max_step[4];
     144             : 
     145           0 :     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
     146           0 :         return -1;
     147             : 
     148           0 :     if (!is_yuv_planar(desc)) {
     149           0 :         if (src)
     150           0 :             return -1; //TODO: Not yet implemented
     151             : 
     152           0 :         av_image_fill_max_pixsteps(max_step, NULL, desc);
     153             : 
     154           0 :         if (padtop || padleft) {
     155           0 :             memset(dst->data[0], color[0],
     156           0 :                     dst->linesize[0] * padtop + (padleft * max_step[0]));
     157             :         }
     158             : 
     159           0 :         if (padleft || padright) {
     160           0 :             optr = dst->data[0] + dst->linesize[0] * padtop +
     161           0 :                     (dst->linesize[0] - (padright * max_step[0]));
     162           0 :             yheight = height - 1 - (padtop + padbottom);
     163           0 :             for (y = 0; y < yheight; y++) {
     164           0 :                 memset(optr, color[0], (padleft + padright) * max_step[0]);
     165           0 :                 optr += dst->linesize[0];
     166             :             }
     167             :         }
     168             : 
     169           0 :         if (padbottom || padright) {
     170           0 :             optr = dst->data[0] + dst->linesize[0] * (height - padbottom) -
     171           0 :                     (padright * max_step[0]);
     172           0 :             memset(optr, color[0], dst->linesize[0] * padbottom +
     173           0 :                     (padright * max_step[0]));
     174             :         }
     175             : 
     176           0 :         return 0;
     177             :     }
     178             : 
     179           0 :     for (i = 0; i < 3; i++) {
     180           0 :         x_shift = i ? desc->log2_chroma_w : 0;
     181           0 :         y_shift = i ? desc->log2_chroma_h : 0;
     182             : 
     183           0 :         if (padtop || padleft) {
     184           0 :             memset(dst->data[i], color[i],
     185           0 :                 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
     186             :         }
     187             : 
     188           0 :         if (padleft || padright) {
     189           0 :             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
     190           0 :                 (dst->linesize[i] - (padright >> x_shift));
     191           0 :             yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
     192           0 :             for (y = 0; y < yheight; y++) {
     193           0 :                 memset(optr, color[i], (padleft + padright) >> x_shift);
     194           0 :                 optr += dst->linesize[i];
     195             :             }
     196             :         }
     197             : 
     198           0 :         if (src) { /* first line */
     199           0 :             uint8_t *iptr = src->data[i];
     200           0 :             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
     201           0 :                     (padleft >> x_shift);
     202           0 :             memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
     203           0 :             iptr += src->linesize[i];
     204           0 :             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
     205           0 :                 (dst->linesize[i] - (padright >> x_shift));
     206           0 :             yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
     207           0 :             for (y = 0; y < yheight; y++) {
     208           0 :                 memset(optr, color[i], (padleft + padright) >> x_shift);
     209           0 :                 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
     210           0 :                        (width - padleft - padright) >> x_shift);
     211           0 :                 iptr += src->linesize[i];
     212           0 :                 optr += dst->linesize[i];
     213             :             }
     214             :         }
     215             : 
     216           0 :         if (padbottom || padright) {
     217           0 :             optr = dst->data[i] + dst->linesize[i] *
     218           0 :                 ((height - padbottom) >> y_shift) - (padright >> x_shift);
     219           0 :             memset(optr, color[i],dst->linesize[i] *
     220           0 :                 (padbottom >> y_shift) + (padright >> x_shift));
     221             :         }
     222             :     }
     223             : 
     224           0 :     return 0;
     225             : }
     226             : FF_ENABLE_DEPRECATION_WARNINGS
     227             : #endif /* FF_API_AVPICTURE */

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