LCOV - code coverage report
Current view: top level - libavfilter - vf_swaprect.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 87 96 90.6 %
Date: 2017-12-10 21:22:29 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 Paul B. Mahol
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "libavutil/avstring.h"
      22             : #include "libavutil/eval.h"
      23             : #include "libavutil/imgutils.h"
      24             : #include "libavutil/opt.h"
      25             : #include "libavutil/pixdesc.h"
      26             : 
      27             : #include "avfilter.h"
      28             : #include "formats.h"
      29             : #include "internal.h"
      30             : #include "video.h"
      31             : 
      32             : typedef struct SwapRectContext {
      33             :     const AVClass *class;
      34             :     char *w, *h;
      35             :     char *x1, *y1;
      36             :     char *x2, *y2;
      37             : 
      38             :     int nb_planes;
      39             :     int pixsteps[4];
      40             : 
      41             :     const AVPixFmtDescriptor *desc;
      42             :     uint8_t *temp;
      43             : } SwapRectContext;
      44             : 
      45             : #define OFFSET(x) offsetof(SwapRectContext, x)
      46             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
      47             : static const AVOption swaprect_options[] = {
      48             :     { "w",  "set rect width",                     OFFSET(w),  AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
      49             :     { "h",  "set rect height",                    OFFSET(h),  AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
      50             :     { "x1", "set 1st rect x top left coordinate", OFFSET(x1), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
      51             :     { "y1", "set 1st rect y top left coordinate", OFFSET(y1), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
      52             :     { "x2", "set 2nd rect x top left coordinate", OFFSET(x2), AV_OPT_TYPE_STRING, {.str="0"},   0, 0, .flags = FLAGS },
      53             :     { "y2", "set 2nd rect y top left coordinate", OFFSET(y2), AV_OPT_TYPE_STRING, {.str="0"},   0, 0, .flags = FLAGS },
      54             :     { NULL },
      55             : };
      56             : 
      57             : AVFILTER_DEFINE_CLASS(swaprect);
      58             : 
      59           1 : static int query_formats(AVFilterContext *ctx)
      60             : {
      61           1 :     AVFilterFormats *pix_fmts = NULL;
      62             :     int fmt, ret;
      63             : 
      64         184 :     for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
      65         183 :         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
      66         532 :         if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
      67         182 :               desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
      68         330 :               desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
      69         163 :             (ret = ff_add_format(&pix_fmts, fmt)) < 0)
      70           0 :             return ret;
      71             :     }
      72             : 
      73           1 :     return ff_set_common_formats(ctx, pix_fmts);
      74             : }
      75             : 
      76             : static const char *const var_names[] = {   "w",   "h",   "a",   "n",   "t",   "pos",   "sar",   "dar",        NULL };
      77             : enum                                   { VAR_W, VAR_H, VAR_A, VAR_N, VAR_T, VAR_POS, VAR_SAR, VAR_DAR, VAR_VARS_NB };
      78             : 
      79          50 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
      80             : {
      81          50 :     AVFilterContext *ctx = inlink->dst;
      82          50 :     AVFilterLink *outlink = ctx->outputs[0];
      83          50 :     SwapRectContext *s = ctx->priv;
      84             :     double var_values[VAR_VARS_NB];
      85             :     int x1[4], y1[4];
      86             :     int x2[4], y2[4];
      87             :     int aw[4], ah[4];
      88             :     int lw[4], lh[4];
      89             :     int pw[4], ph[4];
      90             :     double dw,  dh;
      91             :     double dx1, dy1;
      92             :     double dx2, dy2;
      93             :     int y, p, w, h, ret;
      94             : 
      95          50 :     var_values[VAR_W]   = inlink->w;
      96          50 :     var_values[VAR_H]   = inlink->h;
      97          50 :     var_values[VAR_A]   = (float) inlink->w / inlink->h;
      98          50 :     var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
      99          50 :     var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
     100          50 :     var_values[VAR_N]   = inlink->frame_count_out;
     101          50 :     var_values[VAR_T]   = in->pts == AV_NOPTS_VALUE ? NAN : in->pts * av_q2d(inlink->time_base);
     102          50 :     var_values[VAR_POS] = in->pkt_pos ? NAN : in->pkt_pos;
     103             : 
     104          50 :     ret = av_expr_parse_and_eval(&dw, s->w,
     105             :                                  var_names, &var_values[0],
     106             :                                  NULL, NULL, NULL, NULL,
     107             :                                  0, 0, ctx);
     108          50 :     if (ret < 0)
     109           0 :         return ret;
     110             : 
     111          50 :     ret = av_expr_parse_and_eval(&dh, s->h,
     112             :                                  var_names, &var_values[0],
     113             :                                  NULL, NULL, NULL, NULL,
     114             :                                  0, 0, ctx);
     115          50 :     if (ret < 0)
     116           0 :         return ret;
     117             : 
     118          50 :     ret = av_expr_parse_and_eval(&dx1, s->x1,
     119             :                                  var_names, &var_values[0],
     120             :                                  NULL, NULL, NULL, NULL,
     121             :                                  0, 0, ctx);
     122          50 :     if (ret < 0)
     123           0 :         return ret;
     124             : 
     125          50 :     ret = av_expr_parse_and_eval(&dy1, s->y1,
     126             :                                  var_names, &var_values[0],
     127             :                                  NULL, NULL, NULL, NULL,
     128             :                                  0, 0, ctx);
     129          50 :     if (ret < 0)
     130           0 :         return ret;
     131             : 
     132          50 :     ret = av_expr_parse_and_eval(&dx2, s->x2,
     133             :                                  var_names, &var_values[0],
     134             :                                  NULL, NULL, NULL, NULL,
     135             :                                  0, 0, ctx);
     136          50 :     if (ret < 0)
     137           0 :         return ret;
     138             : 
     139          50 :     ret = av_expr_parse_and_eval(&dy2, s->y2,
     140             :                                  var_names, &var_values[0],
     141             :                                  NULL, NULL, NULL, NULL,
     142             :                                  0, 0, ctx);
     143          50 :     if (ret < 0)
     144           0 :         return ret;
     145             : 
     146          50 :     w = dw; h = dh; x1[0] = dx1; y1[0] = dy1; x2[0] = dx2; y2[0] = dy2;
     147             : 
     148          50 :     x1[0] = av_clip(x1[0], 0, inlink->w - 1);
     149          50 :     y1[0] = av_clip(y1[0], 0, inlink->w - 1);
     150             : 
     151          50 :     x2[0] = av_clip(x2[0], 0, inlink->w - 1);
     152          50 :     y2[0] = av_clip(y2[0], 0, inlink->w - 1);
     153             : 
     154          50 :     ah[1] = ah[2] = FF_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
     155          50 :     ah[0] = ah[3] = h;
     156          50 :     aw[1] = aw[2] = FF_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
     157          50 :     aw[0] = aw[3] = w;
     158             : 
     159          50 :     w = FFMIN3(w, inlink->w - x1[0], inlink->w - x2[0]);
     160          50 :     h = FFMIN3(h, inlink->h - y1[0], inlink->h - y2[0]);
     161             : 
     162          50 :     ph[1] = ph[2] = FF_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
     163          50 :     ph[0] = ph[3] = h;
     164          50 :     pw[1] = pw[2] = FF_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
     165          50 :     pw[0] = pw[3] = w;
     166             : 
     167          50 :     lh[1] = lh[2] = FF_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
     168          50 :     lh[0] = lh[3] = inlink->h;
     169          50 :     lw[1] = lw[2] = FF_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
     170          50 :     lw[0] = lw[3] = inlink->w;
     171             : 
     172          50 :     x1[1] = x1[2] = FF_CEIL_RSHIFT(x1[0], s->desc->log2_chroma_w);
     173          50 :     x1[0] = x1[3] = x1[0];
     174          50 :     y1[1] = y1[2] = FF_CEIL_RSHIFT(y1[0], s->desc->log2_chroma_h);
     175          50 :     y1[0] = y1[3] = y1[0];
     176             : 
     177          50 :     x2[1] = x2[2] = FF_CEIL_RSHIFT(x2[0], s->desc->log2_chroma_w);
     178          50 :     x2[0] = x2[3] = x2[0];
     179          50 :     y2[1] = y2[2] = FF_CEIL_RSHIFT(y2[0], s->desc->log2_chroma_h);
     180          50 :     y2[0] = y2[3] = y2[0];
     181             : 
     182         200 :     for (p = 0; p < s->nb_planes; p++) {
     183         150 :         if (ph[p] == ah[p] && pw[p] == aw[p]) {
     184         150 :             uint8_t *src = in->data[p] + y1[p] * in->linesize[p] + x1[p] * s->pixsteps[p];
     185         150 :             uint8_t *dst = in->data[p] + y2[p] * in->linesize[p] + x2[p] * s->pixsteps[p];
     186             : 
     187       14550 :             for (y = 0; y < ph[p]; y++) {
     188       14400 :                 memcpy(s->temp, src, pw[p] * s->pixsteps[p]);
     189       14400 :                 memmove(src, dst, pw[p] * s->pixsteps[p]);
     190       14400 :                 memcpy(dst, s->temp, pw[p] * s->pixsteps[p]);
     191       14400 :                 src += in->linesize[p];
     192       14400 :                 dst += in->linesize[p];
     193             :             }
     194             :         }
     195             :     }
     196             : 
     197          50 :     return ff_filter_frame(outlink, in);
     198             : }
     199             : 
     200           1 : static int config_input(AVFilterLink *inlink)
     201             : {
     202           1 :     AVFilterContext *ctx = inlink->dst;
     203           1 :     SwapRectContext *s = ctx->priv;
     204             : 
     205           2 :     if (!s->w  || !s->h  ||
     206           3 :         !s->x1 || !s->y1 ||
     207           2 :         !s->x2 || !s->y2)
     208           0 :         return AVERROR(EINVAL);
     209             : 
     210           1 :     s->desc = av_pix_fmt_desc_get(inlink->format);
     211           1 :     av_image_fill_max_pixsteps(s->pixsteps, NULL, s->desc);
     212           1 :     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
     213             : 
     214           1 :     s->temp = av_malloc_array(inlink->w, s->pixsteps[0]);
     215           1 :     if (!s->temp)
     216           0 :         return AVERROR(ENOMEM);
     217             : 
     218           1 :     return 0;
     219             : }
     220             : 
     221           1 : static av_cold void uninit(AVFilterContext *ctx)
     222             : {
     223           1 :     SwapRectContext *s = ctx->priv;
     224           1 :     av_freep(&s->temp);
     225           1 : }
     226             : 
     227             : static const AVFilterPad inputs[] = {
     228             :     {
     229             :         .name           = "default",
     230             :         .type           = AVMEDIA_TYPE_VIDEO,
     231             :         .filter_frame   = filter_frame,
     232             :         .config_props   = config_input,
     233             :         .needs_writable = 1,
     234             :     },
     235             :     { NULL }
     236             : };
     237             : 
     238             : static const AVFilterPad outputs[] = {
     239             :     {
     240             :         .name = "default",
     241             :         .type = AVMEDIA_TYPE_VIDEO,
     242             :     },
     243             :     { NULL }
     244             : };
     245             : 
     246             : AVFilter ff_vf_swaprect = {
     247             :     .name          = "swaprect",
     248             :     .description   = NULL_IF_CONFIG_SMALL("Swap 2 rectangular objects in video."),
     249             :     .priv_size     = sizeof(SwapRectContext),
     250             :     .priv_class    = &swaprect_class,
     251             :     .query_formats = query_formats,
     252             :     .uninit        = uninit,
     253             :     .inputs        = inputs,
     254             :     .outputs       = outputs,
     255             :     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
     256             : };

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