LCOV - code coverage report
Current view: top level - src/libavutil - imgutils.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 192 223 86.1 %
Date: 2017-01-21 09:32:20 Functions: 15 15 100.0 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : /**
      20             :  * @file
      21             :  * misc image utilities
      22             :  */
      23             : 
      24             : #include "avassert.h"
      25             : #include "common.h"
      26             : #include "imgutils.h"
      27             : #include "internal.h"
      28             : #include "intreadwrite.h"
      29             : #include "log.h"
      30             : #include "mathematics.h"
      31             : #include "pixdesc.h"
      32             : #include "rational.h"
      33             : 
      34      300950 : void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
      35             :                                 const AVPixFmtDescriptor *pixdesc)
      36             : {
      37             :     int i;
      38      300950 :     memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
      39      300950 :     if (max_pixstep_comps)
      40      300629 :         memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
      41             : 
      42     1504750 :     for (i = 0; i < 4; i++) {
      43     1203800 :         const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
      44     1203800 :         if (comp->step > max_pixsteps[comp->plane]) {
      45      813875 :             max_pixsteps[comp->plane] = comp->step;
      46      813875 :             if (max_pixstep_comps)
      47      813071 :                 max_pixstep_comps[comp->plane] = i;
      48             :         }
      49             :     }
      50      300950 : }
      51             : 
      52             : static inline
      53     1168859 : int image_get_linesize(int width, int plane,
      54             :                        int max_step, int max_step_comp,
      55             :                        const AVPixFmtDescriptor *desc)
      56             : {
      57             :     int s, shifted_w, linesize;
      58             : 
      59     1168859 :     if (!desc)
      60           0 :         return AVERROR(EINVAL);
      61             : 
      62     1168859 :     if (width < 0)
      63           0 :         return AVERROR(EINVAL);
      64     1168859 :     s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0;
      65     1168859 :     shifted_w = ((width + (1 << s) - 1)) >> s;
      66     1168859 :     if (shifted_w && max_step > INT_MAX / shifted_w)
      67           0 :         return AVERROR(EINVAL);
      68     1168859 :     linesize = max_step * shifted_w;
      69             : 
      70     1168859 :     if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)
      71        6320 :         linesize = (linesize + 7) >> 3;
      72     1168859 :     return linesize;
      73             : }
      74             : 
      75      754252 : int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
      76             : {
      77      754252 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
      78             :     int max_step     [4];       /* max pixel step for each plane */
      79             :     int max_step_comp[4];       /* the component for each plane which has the max pixel step */
      80             : 
      81      754252 :     if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
      82      743033 :         return AVERROR(EINVAL);
      83             : 
      84       11219 :     av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
      85       11219 :     return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc);
      86             : }
      87             : 
      88      289410 : int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
      89             : {
      90             :     int i, ret;
      91      289410 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
      92             :     int max_step     [4];       /* max pixel step for each plane */
      93             :     int max_step_comp[4];       /* the component for each plane which has the max pixel step */
      94             : 
      95      289410 :     memset(linesizes, 0, 4*sizeof(linesizes[0]));
      96             : 
      97      289410 :     if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
      98           0 :         return AVERROR(EINVAL);
      99             : 
     100      289410 :     av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
     101     1447050 :     for (i = 0; i < 4; i++) {
     102     1157640 :         if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0)
     103           0 :             return ret;
     104     1157640 :         linesizes[i] = ret;
     105             :     }
     106             : 
     107      289410 :     return 0;
     108             : }
     109             : 
     110      199089 : int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
     111             :                            uint8_t *ptr, const int linesizes[4])
     112             : {
     113      199089 :     int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 };
     114             : 
     115      199089 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     116      199089 :     memset(data     , 0, sizeof(data[0])*4);
     117             : 
     118      199089 :     if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
     119           0 :         return AVERROR(EINVAL);
     120             : 
     121      199089 :     data[0] = ptr;
     122      199089 :     if (linesizes[0] > (INT_MAX - 1024) / height)
     123           0 :         return AVERROR(EINVAL);
     124      199089 :     size[0] = linesizes[0] * height;
     125             : 
     126      397087 :     if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
     127      197998 :         desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
     128        1139 :         data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */
     129        1139 :         return size[0] + 256 * 4;
     130             :     }
     131             : 
     132      989750 :     for (i = 0; i < 4; i++)
     133      791800 :         has_plane[desc->comp[i].plane] = 1;
     134             : 
     135      197950 :     total_size = size[0];
     136      536798 :     for (i = 1; i < 4 && has_plane[i]; i++) {
     137      338848 :         int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
     138      338848 :         data[i] = data[i-1] + size[i-1];
     139      338848 :         h = (height + (1 << s) - 1) >> s;
     140      338848 :         if (linesizes[i] > INT_MAX / h)
     141           0 :             return AVERROR(EINVAL);
     142      338848 :         size[i] = h * linesizes[i];
     143      338848 :         if (total_size > INT_MAX - size[i])
     144           0 :             return AVERROR(EINVAL);
     145      338848 :         total_size += size[i];
     146             :     }
     147             : 
     148      197950 :     return total_size;
     149             : }
     150             : 
     151        5899 : int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
     152             : {
     153             :     int i;
     154             : 
     155      972043 :     for (i = 0; i < 256; i++) {
     156             :         int r, g, b;
     157             : 
     158      968269 :         switch (pix_fmt) {
     159             :         case AV_PIX_FMT_RGB8:
     160      119040 :             r = (i>>5    )*36;
     161      119040 :             g = ((i>>2)&7)*36;
     162      119040 :             b = (i&3     )*85;
     163      119040 :             break;
     164             :         case AV_PIX_FMT_BGR8:
     165      254208 :             b = (i>>6    )*85;
     166      254208 :             g = ((i>>3)&7)*36;
     167      254208 :             r = (i&7     )*36;
     168      254208 :             break;
     169             :         case AV_PIX_FMT_RGB4_BYTE:
     170      105216 :             r = (i>>3    )*255;
     171      105216 :             g = ((i>>1)&3)*85;
     172      105216 :             b = (i&1     )*255;
     173      105216 :             break;
     174             :         case AV_PIX_FMT_BGR4_BYTE:
     175       98560 :             b = (i>>3    )*255;
     176       98560 :             g = ((i>>1)&3)*85;
     177       98560 :             r = (i&1     )*255;
     178       98560 :             break;
     179             :         case AV_PIX_FMT_GRAY8:
     180      389120 :             r = b = g = i;
     181      389120 :             break;
     182             :         default:
     183        2125 :             return AVERROR(EINVAL);
     184             :         }
     185      966144 :         pal[i] = b + (g << 8) + (r << 16) + (0xFFU << 24);
     186             :     }
     187             : 
     188        3774 :     return 0;
     189             : }
     190             : 
     191          34 : int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
     192             :                    int w, int h, enum AVPixelFormat pix_fmt, int align)
     193             : {
     194          34 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     195             :     int i, ret;
     196             :     uint8_t *buf;
     197             : 
     198          34 :     if (!desc)
     199           0 :         return AVERROR(EINVAL);
     200             : 
     201          34 :     if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
     202           0 :         return ret;
     203          34 :     if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0)
     204           0 :         return ret;
     205             : 
     206         170 :     for (i = 0; i < 4; i++)
     207         136 :         linesizes[i] = FFALIGN(linesizes[i], align);
     208             : 
     209          34 :     if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
     210           0 :         return ret;
     211          34 :     buf = av_malloc(ret + align);
     212          34 :     if (!buf)
     213           0 :         return AVERROR(ENOMEM);
     214          34 :     if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
     215           0 :         av_free(buf);
     216           0 :         return ret;
     217             :     }
     218          34 :     if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
     219           1 :         avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
     220           1 :         if (align < 4) {
     221           0 :             av_log(NULL, AV_LOG_ERROR, "Formats with a palette require a minimum alignment of 4\n");
     222           0 :             return AVERROR(EINVAL);
     223             :         }
     224             :     }
     225             : 
     226          68 :     if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
     227          35 :          desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) &&
     228           1 :         pointers[1] - pointers[0] > linesizes[0] * h) {
     229             :         /* zero-initialize the padding before the palette */
     230           0 :         memset(pointers[0] + linesizes[0] * h, 0,
     231           0 :                pointers[1] - pointers[0] - linesizes[0] * h);
     232             :     }
     233             : 
     234          34 :     return ret;
     235             : }
     236             : 
     237             : typedef struct ImgUtils {
     238             :     const AVClass *class;
     239             :     int   log_offset;
     240             :     void *log_ctx;
     241             : } ImgUtils;
     242             : 
     243             : static const AVClass imgutils_class = {
     244             :     .class_name = "IMGUTILS",
     245             :     .item_name  = av_default_item_name,
     246             :     .version    = LIBAVUTIL_VERSION_INT,
     247             :     .log_level_offset_offset   = offsetof(ImgUtils, log_offset),
     248             :     .parent_log_context_offset = offsetof(ImgUtils, log_ctx),
     249             : };
     250             : 
     251      743033 : int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
     252             : {
     253      743033 :     ImgUtils imgutils = {
     254             :         .class      = &imgutils_class,
     255             :         .log_offset = log_offset,
     256             :         .log_ctx    = log_ctx,
     257             :     };
     258      743033 :     int64_t stride = av_image_get_linesize(pix_fmt, w, 0);
     259      743033 :     if (stride <= 0)
     260      743033 :         stride = 8LL*w;
     261      743033 :     stride += 128*8;
     262             : 
     263      743033 :     if ((int)w<=0 || (int)h<=0 || stride >= INT_MAX || stride*(uint64_t)(h+128) >= INT_MAX) {
     264        2159 :         av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
     265        2159 :         return AVERROR(EINVAL);
     266             :     }
     267             : 
     268      740874 :     if (max_pixels < INT64_MAX) {
     269      319490 :         if (w*(int64_t)h > max_pixels) {
     270           0 :             av_log(&imgutils, AV_LOG_ERROR,
     271             :                     "Picture size %ux%u exceeds specified max pixel count %"PRId64", see the documentation if you wish to increase it\n",
     272             :                     w, h, max_pixels);
     273           0 :             return AVERROR(EINVAL);
     274             :         }
     275             :     }
     276             : 
     277      740874 :     return 0;
     278             : }
     279             : 
     280      423543 : int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
     281             : {
     282      423543 :     return av_image_check_size2(w, h, INT64_MAX, AV_PIX_FMT_NONE, log_offset, log_ctx);
     283             : }
     284             : 
     285      126442 : int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
     286             : {
     287             :     int64_t scaled_dim;
     288             : 
     289      126442 :     if (sar.den <= 0 || sar.num < 0)
     290           5 :         return AVERROR(EINVAL);
     291             : 
     292      126437 :     if (!sar.num || sar.num == sar.den)
     293      121723 :         return 0;
     294             : 
     295        4714 :     if (sar.num < sar.den)
     296         865 :         scaled_dim = av_rescale_rnd(w, sar.num, sar.den, AV_ROUND_ZERO);
     297             :     else
     298        3849 :         scaled_dim = av_rescale_rnd(h, sar.den, sar.num, AV_ROUND_ZERO);
     299             : 
     300        4714 :     if (scaled_dim > 0)
     301        4705 :         return 0;
     302             : 
     303           9 :     return AVERROR(EINVAL);
     304             : }
     305             : 
     306       20395 : void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
     307             :                          const uint8_t *src, int src_linesize,
     308             :                          int bytewidth, int height)
     309             : {
     310       20395 :     if (!dst || !src)
     311           0 :         return;
     312       20395 :     av_assert0(abs(src_linesize) >= bytewidth);
     313       20395 :     av_assert0(abs(dst_linesize) >= bytewidth);
     314     4098478 :     for (;height > 0; height--) {
     315     4078083 :         memcpy(dst, src, bytewidth);
     316     4078083 :         dst += dst_linesize;
     317     4078083 :         src += src_linesize;
     318             :     }
     319             : }
     320             : 
     321        4839 : void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
     322             :                    const uint8_t *src_data[4], const int src_linesizes[4],
     323             :                    enum AVPixelFormat pix_fmt, int width, int height)
     324             : {
     325        4839 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     326             : 
     327        4839 :     if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
     328           0 :         return;
     329             : 
     330        9469 :     if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
     331        4630 :         desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
     332         272 :         av_image_copy_plane(dst_data[0], dst_linesizes[0],
     333             :                             src_data[0], src_linesizes[0],
     334             :                             width, height);
     335             :         /* copy the palette */
     336         272 :         memcpy(dst_data[1], src_data[1], 4*256);
     337             :     } else {
     338        4567 :         int i, planes_nb = 0;
     339             : 
     340       18929 :         for (i = 0; i < desc->nb_components; i++)
     341       14362 :             planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
     342             : 
     343       15750 :         for (i = 0; i < planes_nb; i++) {
     344       11183 :             int h = height;
     345       11183 :             int bwidth = av_image_get_linesize(pix_fmt, width, i);
     346       11183 :             if (bwidth < 0) {
     347           0 :                 av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n");
     348           0 :                 return;
     349             :             }
     350       11183 :             if (i == 1 || i == 2) {
     351        6438 :                 h = AV_CEIL_RSHIFT(height, desc->log2_chroma_h);
     352             :             }
     353       22366 :             av_image_copy_plane(dst_data[i], dst_linesizes[i],
     354       22366 :                                 src_data[i], src_linesizes[i],
     355             :                                 bwidth, h);
     356             :         }
     357             :     }
     358             : }
     359             : 
     360      191803 : int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
     361             :                          const uint8_t *src, enum AVPixelFormat pix_fmt,
     362             :                          int width, int height, int align)
     363             : {
     364             :     int ret, i;
     365             : 
     366      191803 :     ret = av_image_check_size(width, height, 0, NULL);
     367      191803 :     if (ret < 0)
     368           0 :         return ret;
     369             : 
     370      191803 :     ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width);
     371      191803 :     if (ret < 0)
     372           0 :         return ret;
     373             : 
     374      959015 :     for (i = 0; i < 4; i++)
     375      767212 :         dst_linesize[i] = FFALIGN(dst_linesize[i], align);
     376             : 
     377      191803 :     return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize);
     378             : }
     379             : 
     380      174365 : int av_image_get_buffer_size(enum AVPixelFormat pix_fmt,
     381             :                              int width, int height, int align)
     382             : {
     383             :     uint8_t *data[4];
     384             :     int linesize[4];
     385             :     int ret;
     386      174365 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     387      174365 :     if (!desc)
     388           0 :         return AVERROR(EINVAL);
     389             : 
     390      174365 :     ret = av_image_check_size(width, height, 0, NULL);
     391      174365 :     if (ret < 0)
     392           0 :         return ret;
     393             : 
     394             :     // do not include palette for these pseudo-paletted formats
     395      174365 :     if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
     396        2088 :         return FFALIGN(width, align) * height;
     397             : 
     398      172277 :     return av_image_fill_arrays(data, linesize, NULL, pix_fmt,
     399             :                                 width, height, align);
     400             : }
     401             : 
     402       74721 : int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
     403             :                             const uint8_t * const src_data[4],
     404             :                             const int src_linesize[4],
     405             :                             enum AVPixelFormat pix_fmt,
     406             :                             int width, int height, int align)
     407             : {
     408       74721 :     int i, j, nb_planes = 0, linesize[4];
     409       74721 :     int size = av_image_get_buffer_size(pix_fmt, width, height, align);
     410       74721 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     411             :     int ret;
     412             : 
     413       74721 :     if (size > dst_size || size < 0 || !desc)
     414           0 :         return AVERROR(EINVAL);
     415             : 
     416      299254 :     for (i = 0; i < desc->nb_components; i++)
     417      224533 :         nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
     418             : 
     419       74721 :     nb_planes++;
     420             : 
     421       74721 :     ret = av_image_fill_linesizes(linesize, pix_fmt, width);
     422       74721 :     av_assert0(ret >= 0); // was checked previously
     423             : 
     424      276295 :     for (i = 0; i < nb_planes; i++) {
     425      201574 :         int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
     426      201574 :         const uint8_t *src = src_data[i];
     427      201574 :         h = (height + (1 << shift) - 1) >> shift;
     428             : 
     429    44153657 :         for (j = 0; j < h; j++) {
     430    43952083 :             memcpy(dst, src, linesize[i]);
     431    43952083 :             dst += FFALIGN(linesize[i], align);
     432    43952083 :             src += src_linesize[i];
     433             :         }
     434             :     }
     435             : 
     436       74721 :     if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
     437         286 :         uint32_t *d32 = (uint32_t *)dst;
     438             : 
     439       73502 :         for (i = 0; i<256; i++)
     440       73216 :             AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i));
     441             :     }
     442             : 
     443       74721 :     return size;
     444             : }

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