LCOV - code coverage report
Current view: top level - libavfilter - vf_scale.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 210 286 73.4 %
Date: 2017-12-11 04:34:20 Functions: 12 13 92.3 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2007 Bobby Bingham
       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             : /**
      22             :  * @file
      23             :  * scale video filter
      24             :  */
      25             : 
      26             : #include <stdio.h>
      27             : #include <string.h>
      28             : 
      29             : #include "avfilter.h"
      30             : #include "formats.h"
      31             : #include "internal.h"
      32             : #include "scale.h"
      33             : #include "video.h"
      34             : #include "libavutil/avstring.h"
      35             : #include "libavutil/internal.h"
      36             : #include "libavutil/mathematics.h"
      37             : #include "libavutil/opt.h"
      38             : #include "libavutil/parseutils.h"
      39             : #include "libavutil/pixdesc.h"
      40             : #include "libavutil/imgutils.h"
      41             : #include "libavutil/avassert.h"
      42             : #include "libswscale/swscale.h"
      43             : 
      44             : enum EvalMode {
      45             :     EVAL_MODE_INIT,
      46             :     EVAL_MODE_FRAME,
      47             :     EVAL_MODE_NB
      48             : };
      49             : 
      50             : typedef struct ScaleContext {
      51             :     const AVClass *class;
      52             :     struct SwsContext *sws;     ///< software scaler context
      53             :     struct SwsContext *isws[2]; ///< software scaler context for interlaced material
      54             :     AVDictionary *opts;
      55             : 
      56             :     /**
      57             :      * New dimensions. Special values are:
      58             :      *   0 = original width/height
      59             :      *  -1 = keep original aspect
      60             :      *  -N = try to keep aspect but make sure it is divisible by N
      61             :      */
      62             :     int w, h;
      63             :     char *size_str;
      64             :     unsigned int flags;         ///sws flags
      65             :     double param[2];            // sws params
      66             : 
      67             :     int hsub, vsub;             ///< chroma subsampling
      68             :     int slice_y;                ///< top of current output slice
      69             :     int input_is_pal;           ///< set to 1 if the input format is paletted
      70             :     int output_is_pal;          ///< set to 1 if the output format is paletted
      71             :     int interlaced;
      72             : 
      73             :     char *w_expr;               ///< width  expression string
      74             :     char *h_expr;               ///< height expression string
      75             :     char *flags_str;
      76             : 
      77             :     char *in_color_matrix;
      78             :     char *out_color_matrix;
      79             : 
      80             :     int in_range;
      81             :     int out_range;
      82             : 
      83             :     int out_h_chr_pos;
      84             :     int out_v_chr_pos;
      85             :     int in_h_chr_pos;
      86             :     int in_v_chr_pos;
      87             : 
      88             :     int force_original_aspect_ratio;
      89             : 
      90             :     int nb_slices;
      91             : 
      92             :     int eval_mode;              ///< expression evaluation mode
      93             : 
      94             : } ScaleContext;
      95             : 
      96             : AVFilter ff_vf_scale2ref;
      97             : 
      98        3044 : static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
      99             : {
     100        3044 :     ScaleContext *scale = ctx->priv;
     101             :     int ret;
     102             : 
     103        3044 :     if (scale->size_str && (scale->w_expr || scale->h_expr)) {
     104           0 :         av_log(ctx, AV_LOG_ERROR,
     105             :                "Size and width/height expressions cannot be set at the same time.\n");
     106           0 :             return AVERROR(EINVAL);
     107             :     }
     108             : 
     109        3044 :     if (scale->w_expr && !scale->h_expr)
     110           0 :         FFSWAP(char *, scale->w_expr, scale->size_str);
     111             : 
     112        3044 :     if (scale->size_str) {
     113             :         char buf[32];
     114           0 :         if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
     115           0 :             av_log(ctx, AV_LOG_ERROR,
     116             :                    "Invalid size '%s'\n", scale->size_str);
     117           0 :             return ret;
     118             :         }
     119           0 :         snprintf(buf, sizeof(buf)-1, "%d", scale->w);
     120           0 :         av_opt_set(scale, "w", buf, 0);
     121           0 :         snprintf(buf, sizeof(buf)-1, "%d", scale->h);
     122           0 :         av_opt_set(scale, "h", buf, 0);
     123             :     }
     124        3044 :     if (!scale->w_expr)
     125        2254 :         av_opt_set(scale, "w", "iw", 0);
     126        3044 :     if (!scale->h_expr)
     127        2254 :         av_opt_set(scale, "h", "ih", 0);
     128             : 
     129        6088 :     av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
     130        3044 :            scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
     131             : 
     132        3044 :     scale->flags = 0;
     133             : 
     134        3044 :     if (scale->flags_str) {
     135        3044 :         const AVClass *class = sws_get_class();
     136        3044 :         const AVOption    *o = av_opt_find(&class, "sws_flags", NULL, 0,
     137             :                                            AV_OPT_SEARCH_FAKE_OBJ);
     138        3044 :         int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
     139        3044 :         if (ret < 0)
     140           0 :             return ret;
     141             :     }
     142        3044 :     scale->opts = *opts;
     143        3044 :     *opts = NULL;
     144             : 
     145        3044 :     return 0;
     146             : }
     147             : 
     148        3044 : static av_cold void uninit(AVFilterContext *ctx)
     149             : {
     150        3044 :     ScaleContext *scale = ctx->priv;
     151        3044 :     sws_freeContext(scale->sws);
     152        3044 :     sws_freeContext(scale->isws[0]);
     153        3044 :     sws_freeContext(scale->isws[1]);
     154        3044 :     scale->sws = NULL;
     155        3044 :     av_dict_free(&scale->opts);
     156        3044 : }
     157             : 
     158        3035 : static int query_formats(AVFilterContext *ctx)
     159             : {
     160             :     AVFilterFormats *formats;
     161             :     enum AVPixelFormat pix_fmt;
     162             :     int ret;
     163             : 
     164        3035 :     if (ctx->inputs[0]) {
     165        3035 :         const AVPixFmtDescriptor *desc = NULL;
     166        3035 :         formats = NULL;
     167      561475 :         while ((desc = av_pix_fmt_desc_next(desc))) {
     168      555405 :             pix_fmt = av_pix_fmt_desc_get_id(desc);
     169      634315 :             if ((sws_isSupportedInput(pix_fmt) ||
     170       78910 :                  sws_isSupportedEndiannessConversion(pix_fmt))
     171      476495 :                 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
     172           0 :                 return ret;
     173             :             }
     174             :         }
     175        3035 :         if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
     176           0 :             return ret;
     177             :     }
     178        3035 :     if (ctx->outputs[0]) {
     179        3035 :         const AVPixFmtDescriptor *desc = NULL;
     180        3035 :         formats = NULL;
     181      561475 :         while ((desc = av_pix_fmt_desc_next(desc))) {
     182      555405 :             pix_fmt = av_pix_fmt_desc_get_id(desc);
     183      676805 :             if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
     184      121400 :                  sws_isSupportedEndiannessConversion(pix_fmt))
     185      434005 :                 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
     186           0 :                 return ret;
     187             :             }
     188             :         }
     189        3035 :         if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
     190           0 :             return ret;
     191             :     }
     192             : 
     193        3035 :     return 0;
     194             : }
     195             : 
     196       37987 : static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
     197             : {
     198       37987 :     if (!s)
     199           0 :         s = "bt601";
     200             : 
     201       37987 :     if (s && strstr(s, "bt709")) {
     202           0 :         colorspace = AVCOL_SPC_BT709;
     203       37987 :     } else if (s && strstr(s, "fcc")) {
     204           0 :         colorspace = AVCOL_SPC_FCC;
     205       37987 :     } else if (s && strstr(s, "smpte240m")) {
     206           0 :         colorspace = AVCOL_SPC_SMPTE240M;
     207       37987 :     } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
     208           0 :         colorspace = AVCOL_SPC_BT470BG;
     209       37987 :     } else if (s && strstr(s, "bt2020")) {
     210           0 :         colorspace = AVCOL_SPC_BT2020_NCL;
     211             :     }
     212             : 
     213       37987 :     if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
     214           0 :         colorspace = AVCOL_SPC_BT470BG;
     215             :     }
     216             : 
     217       37987 :     return sws_getCoefficients(colorspace);
     218             : }
     219             : 
     220        2994 : static int config_props(AVFilterLink *outlink)
     221             : {
     222        2994 :     AVFilterContext *ctx = outlink->src;
     223        2994 :     AVFilterLink *inlink0 = outlink->src->inputs[0];
     224        5988 :     AVFilterLink *inlink  = ctx->filter == &ff_vf_scale2ref ?
     225        5987 :                             outlink->src->inputs[1] :
     226        2993 :                             outlink->src->inputs[0];
     227        2994 :     enum AVPixelFormat outfmt = outlink->format;
     228        2994 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
     229        2994 :     ScaleContext *scale = ctx->priv;
     230             :     int w, h;
     231             :     int ret;
     232             : 
     233        2994 :     if ((ret = ff_scale_eval_dimensions(ctx,
     234        2994 :                                         scale->w_expr, scale->h_expr,
     235             :                                         inlink, outlink,
     236             :                                         &w, &h)) < 0)
     237           0 :         goto fail;
     238             : 
     239             :     /* Note that force_original_aspect_ratio may overwrite the previous set
     240             :      * dimensions so that it is not divisible by the set factors anymore. */
     241        2994 :     if (scale->force_original_aspect_ratio) {
     242           0 :         int tmp_w = av_rescale(h, inlink->w, inlink->h);
     243           0 :         int tmp_h = av_rescale(w, inlink->h, inlink->w);
     244             : 
     245           0 :         if (scale->force_original_aspect_ratio == 1) {
     246           0 :              w = FFMIN(tmp_w, w);
     247           0 :              h = FFMIN(tmp_h, h);
     248             :         } else {
     249           0 :              w = FFMAX(tmp_w, w);
     250           0 :              h = FFMAX(tmp_h, h);
     251             :         }
     252             :     }
     253             : 
     254             :     if (w > INT_MAX || h > INT_MAX ||
     255             :         (h * inlink->w) > INT_MAX  ||
     256             :         (w * inlink->h) > INT_MAX)
     257             :         av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
     258             : 
     259        2994 :     outlink->w = w;
     260        2994 :     outlink->h = h;
     261             : 
     262             :     /* TODO: make algorithm configurable */
     263             : 
     264        5899 :     scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
     265        2905 :                           desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
     266        2994 :     if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
     267        5988 :     scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL ||
     268        2994 :                            av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
     269             : 
     270        2994 :     if (scale->sws)
     271           1 :         sws_freeContext(scale->sws);
     272        2994 :     if (scale->isws[0])
     273           0 :         sws_freeContext(scale->isws[0]);
     274        2994 :     if (scale->isws[1])
     275           0 :         sws_freeContext(scale->isws[1]);
     276        2994 :     scale->isws[0] = scale->isws[1] = scale->sws = NULL;
     277        5625 :     if (inlink0->w == outlink->w &&
     278        5254 :         inlink0->h == outlink->h &&
     279        5246 :         !scale->out_color_matrix &&
     280        5246 :         scale->in_range == scale->out_range &&
     281        2623 :         inlink0->format == outlink->format)
     282             :         ;
     283             :     else {
     284        2825 :         struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
     285             :         int i;
     286             : 
     287        2825 :         for (i = 0; i < 3; i++) {
     288        2825 :             int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos;
     289        2825 :             struct SwsContext **s = swscs[i];
     290        2825 :             *s = sws_alloc_context();
     291        2825 :             if (!*s)
     292           0 :                 return AVERROR(ENOMEM);
     293             : 
     294        2825 :             av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
     295        2825 :             av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
     296        2825 :             av_opt_set_int(*s, "src_format", inlink0->format, 0);
     297        2825 :             av_opt_set_int(*s, "dstw", outlink->w, 0);
     298        2825 :             av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
     299        2825 :             av_opt_set_int(*s, "dst_format", outfmt, 0);
     300        2825 :             av_opt_set_int(*s, "sws_flags", scale->flags, 0);
     301        2825 :             av_opt_set_int(*s, "param0", scale->param[0], 0);
     302        2825 :             av_opt_set_int(*s, "param1", scale->param[1], 0);
     303        2825 :             if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
     304           0 :                 av_opt_set_int(*s, "src_range",
     305           0 :                                scale->in_range == AVCOL_RANGE_JPEG, 0);
     306        2825 :             if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
     307           0 :                 av_opt_set_int(*s, "dst_range",
     308           0 :                                scale->out_range == AVCOL_RANGE_JPEG, 0);
     309             : 
     310        2825 :             if (scale->opts) {
     311        2608 :                 AVDictionaryEntry *e = NULL;
     312        7824 :                 while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
     313        2608 :                     if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
     314           0 :                         return ret;
     315             :                 }
     316             :             }
     317             :             /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
     318             :              * MPEG-2 chroma positions are used by convention
     319             :              * XXX: support other 4:2:0 pixel formats */
     320        2825 :             if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
     321        2166 :                 in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
     322             :             }
     323             : 
     324        2825 :             if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
     325         344 :                 out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
     326             :             }
     327             : 
     328        2825 :             av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
     329        2825 :             av_opt_set_int(*s, "src_v_chr_pos", in_v_chr_pos, 0);
     330        2825 :             av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
     331        2825 :             av_opt_set_int(*s, "dst_v_chr_pos", out_v_chr_pos, 0);
     332             : 
     333        2825 :             if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
     334           0 :                 return ret;
     335        2825 :             if (!scale->interlaced)
     336        2825 :                 break;
     337             :         }
     338             :     }
     339             : 
     340        2994 :     if (inlink0->sample_aspect_ratio.num){
     341         198 :         outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
     342             :     } else
     343        2796 :         outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
     344             : 
     345        8982 :     av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n",
     346        2994 :            inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
     347             :            inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
     348        2994 :            outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
     349             :            outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
     350             :            scale->flags);
     351        2994 :     return 0;
     352             : 
     353           0 : fail:
     354           0 :     return ret;
     355             : }
     356             : 
     357           1 : static int config_props_ref(AVFilterLink *outlink)
     358             : {
     359           1 :     AVFilterLink *inlink = outlink->src->inputs[1];
     360             : 
     361           1 :     outlink->w = inlink->w;
     362           1 :     outlink->h = inlink->h;
     363           1 :     outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
     364           1 :     outlink->time_base = inlink->time_base;
     365           1 :     outlink->frame_rate = inlink->frame_rate;
     366             : 
     367           1 :     return 0;
     368             : }
     369             : 
     370           5 : static int request_frame(AVFilterLink *outlink)
     371             : {
     372           5 :     return ff_request_frame(outlink->src->inputs[0]);
     373             : }
     374             : 
     375           5 : static int request_frame_ref(AVFilterLink *outlink)
     376             : {
     377           5 :     return ff_request_frame(outlink->src->inputs[1]);
     378             : }
     379             : 
     380       37987 : static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
     381             : {
     382       37987 :     ScaleContext *scale = link->dst->priv;
     383             :     const uint8_t *in[4];
     384             :     uint8_t *out[4];
     385             :     int in_stride[4],out_stride[4];
     386             :     int i;
     387             : 
     388      189935 :     for(i=0; i<4; i++){
     389      151948 :         int vsub= ((i+1)&2) ? scale->vsub : 0;
     390      151948 :          in_stride[i] = cur_pic->linesize[i] * mul;
     391      151948 :         out_stride[i] = out_buf->linesize[i] * mul;
     392      151948 :          in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
     393      151948 :         out[i] = out_buf->data[i] +            field  * out_buf->linesize[i];
     394             :     }
     395       37987 :     if(scale->input_is_pal)
     396        3918 :          in[1] = cur_pic->data[1];
     397       37987 :     if(scale->output_is_pal)
     398        1628 :         out[1] = out_buf->data[1];
     399             : 
     400       37987 :     return sws_scale(sws, in, in_stride, y/mul, h,
     401             :                          out,out_stride);
     402             : }
     403             : 
     404       45999 : static int filter_frame(AVFilterLink *link, AVFrame *in)
     405             : {
     406       45999 :     ScaleContext *scale = link->dst->priv;
     407       45999 :     AVFilterLink *outlink = link->dst->outputs[0];
     408             :     AVFrame *out;
     409       45999 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
     410             :     char buf[32];
     411             :     int in_range;
     412             : 
     413       45999 :     if (in->colorspace == AVCOL_SPC_YCGCO)
     414           0 :         av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
     415             : 
     416       45999 :     if(   in->width  != link->w
     417       45998 :        || in->height != link->h
     418       45998 :        || in->format != link->format
     419       45998 :        || in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || in->sample_aspect_ratio.num != link->sample_aspect_ratio.num) {
     420             :         int ret;
     421             : 
     422           2 :         if (scale->eval_mode == EVAL_MODE_INIT) {
     423           2 :             snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
     424           2 :             av_opt_set(scale, "w", buf, 0);
     425           2 :             snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
     426           2 :             av_opt_set(scale, "h", buf, 0);
     427             :         }
     428             : 
     429           2 :         link->dst->inputs[0]->format = in->format;
     430           2 :         link->dst->inputs[0]->w      = in->width;
     431           2 :         link->dst->inputs[0]->h      = in->height;
     432             : 
     433           2 :         link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
     434           2 :         link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
     435             : 
     436             : 
     437           2 :         if ((ret = config_props(outlink)) < 0)
     438           0 :             return ret;
     439             :     }
     440             : 
     441       45999 :     if (!scale->sws)
     442        8012 :         return ff_filter_frame(outlink, in);
     443             : 
     444       37987 :     scale->hsub = desc->log2_chroma_w;
     445       37987 :     scale->vsub = desc->log2_chroma_h;
     446             : 
     447       37987 :     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     448       37987 :     if (!out) {
     449           0 :         av_frame_free(&in);
     450           0 :         return AVERROR(ENOMEM);
     451             :     }
     452             : 
     453       37987 :     av_frame_copy_props(out, in);
     454       37987 :     out->width  = outlink->w;
     455       37987 :     out->height = outlink->h;
     456             : 
     457       37987 :     if(scale->output_is_pal)
     458        1628 :         avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
     459             : 
     460       37987 :     in_range = in->color_range;
     461             : 
     462       37987 :     if (   scale->in_color_matrix
     463           0 :         || scale->out_color_matrix
     464           0 :         || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
     465           0 :         || in_range != AVCOL_RANGE_UNSPECIFIED
     466           0 :         || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
     467             :         int in_full, out_full, brightness, contrast, saturation;
     468             :         const int *inv_table, *table;
     469             : 
     470       37987 :         sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
     471             :                                  (int **)&table, &out_full,
     472             :                                  &brightness, &contrast, &saturation);
     473             : 
     474       37987 :         if (scale->in_color_matrix)
     475       37987 :             inv_table = parse_yuv_type(scale->in_color_matrix, in->colorspace);
     476       37987 :         if (scale->out_color_matrix)
     477           0 :             table     = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED);
     478       37987 :         else if (scale->in_color_matrix)
     479       37987 :             table = inv_table;
     480             : 
     481       37987 :         if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
     482           0 :             in_full  = (scale-> in_range == AVCOL_RANGE_JPEG);
     483       37987 :         else if (in_range != AVCOL_RANGE_UNSPECIFIED)
     484        4604 :             in_full  = (in_range == AVCOL_RANGE_JPEG);
     485       37987 :         if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
     486           0 :             out_full = (scale->out_range == AVCOL_RANGE_JPEG);
     487             : 
     488       37987 :         sws_setColorspaceDetails(scale->sws, inv_table, in_full,
     489             :                                  table, out_full,
     490             :                                  brightness, contrast, saturation);
     491       37987 :         if (scale->isws[0])
     492           0 :             sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
     493             :                                      table, out_full,
     494             :                                      brightness, contrast, saturation);
     495       37987 :         if (scale->isws[1])
     496           0 :             sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
     497             :                                      table, out_full,
     498             :                                      brightness, contrast, saturation);
     499             : 
     500       37987 :         out->color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
     501             :     }
     502             : 
     503       75974 :     av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
     504       37987 :               (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
     505       37987 :               (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
     506             :               INT_MAX);
     507             : 
     508       37987 :     if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
     509           0 :         scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
     510           0 :         scale_slice(link, out, in, scale->isws[1], 0,  link->h   /2, 2, 1);
     511       37987 :     }else if (scale->nb_slices) {
     512           0 :         int i, slice_h, slice_start, slice_end = 0;
     513           0 :         const int nb_slices = FFMIN(scale->nb_slices, link->h);
     514           0 :         for (i = 0; i < nb_slices; i++) {
     515           0 :             slice_start = slice_end;
     516           0 :             slice_end   = (link->h * (i+1)) / nb_slices;
     517           0 :             slice_h     = slice_end - slice_start;
     518           0 :             scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
     519             :         }
     520             :     }else{
     521       37987 :         scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
     522             :     }
     523             : 
     524       37987 :     av_frame_free(&in);
     525       37987 :     return ff_filter_frame(outlink, out);
     526             : }
     527             : 
     528           5 : static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
     529             : {
     530           5 :     AVFilterLink *outlink = link->dst->outputs[1];
     531             : 
     532           5 :     return ff_filter_frame(outlink, in);
     533             : }
     534             : 
     535           0 : static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
     536             :                            char *res, int res_len, int flags)
     537             : {
     538           0 :     ScaleContext *scale = ctx->priv;
     539             :     int ret;
     540             : 
     541           0 :     if (   !strcmp(cmd, "width")  || !strcmp(cmd, "w")
     542           0 :         || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
     543             : 
     544           0 :         int old_w = scale->w;
     545           0 :         int old_h = scale->h;
     546           0 :         AVFilterLink *outlink = ctx->outputs[0];
     547             : 
     548           0 :         av_opt_set(scale, cmd, args, 0);
     549           0 :         if ((ret = config_props(outlink)) < 0) {
     550           0 :             scale->w = old_w;
     551           0 :             scale->h = old_h;
     552             :         }
     553             :     } else
     554           0 :         ret = AVERROR(ENOSYS);
     555             : 
     556           0 :     return ret;
     557             : }
     558             : 
     559        2770 : static const AVClass *child_class_next(const AVClass *prev)
     560             : {
     561        2770 :     return prev ? NULL : sws_get_class();
     562             : }
     563             : 
     564             : #define OFFSET(x) offsetof(ScaleContext, x)
     565             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
     566             : 
     567             : static const AVOption scale_options[] = {
     568             :     { "w",     "Output video width",          OFFSET(w_expr),    AV_OPT_TYPE_STRING,        .flags = FLAGS },
     569             :     { "width", "Output video width",          OFFSET(w_expr),    AV_OPT_TYPE_STRING,        .flags = FLAGS },
     570             :     { "h",     "Output video height",         OFFSET(h_expr),    AV_OPT_TYPE_STRING,        .flags = FLAGS },
     571             :     { "height","Output video height",         OFFSET(h_expr),    AV_OPT_TYPE_STRING,        .flags = FLAGS },
     572             :     { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
     573             :     { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
     574             :     { "size",   "set video size",          OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
     575             :     { "s",      "set video size",          OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
     576             :     {  "in_color_matrix", "set input YCbCr type",   OFFSET(in_color_matrix),  AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
     577             :     { "out_color_matrix", "set output YCbCr type",  OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
     578             :     {  "in_range", "set input color range",  OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
     579             :     { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
     580             :     { "auto",   NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
     581             :     { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
     582             :     { "full",   NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
     583             :     { "limited",NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
     584             :     { "jpeg",   NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
     585             :     { "mpeg",   NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
     586             :     { "tv",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
     587             :     { "pc",     NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
     588             :     { "in_v_chr_pos",   "input vertical chroma position in luma grid/256"  ,   OFFSET(in_v_chr_pos),  AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
     589             :     { "in_h_chr_pos",   "input horizontal chroma position in luma grid/256",   OFFSET(in_h_chr_pos),  AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
     590             :     { "out_v_chr_pos",   "output vertical chroma position in luma grid/256"  , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
     591             :     { "out_h_chr_pos",   "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
     592             :     { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, "force_oar" },
     593             :     { "disable",  NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
     594             :     { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
     595             :     { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
     596             :     { "param0", "Scaler param 0",             OFFSET(param[0]),  AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT  }, INT_MIN, INT_MAX, FLAGS },
     597             :     { "param1", "Scaler param 1",             OFFSET(param[1]),  AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT  }, INT_MIN, INT_MAX, FLAGS },
     598             :     { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
     599             :     { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
     600             :          { "init",  "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT},  .flags = FLAGS, .unit = "eval" },
     601             :          { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
     602             :     { NULL }
     603             : };
     604             : 
     605             : static const AVClass scale_class = {
     606             :     .class_name       = "scale",
     607             :     .item_name        = av_default_item_name,
     608             :     .option           = scale_options,
     609             :     .version          = LIBAVUTIL_VERSION_INT,
     610             :     .category         = AV_CLASS_CATEGORY_FILTER,
     611             :     .child_class_next = child_class_next,
     612             : };
     613             : 
     614             : static const AVFilterPad avfilter_vf_scale_inputs[] = {
     615             :     {
     616             :         .name         = "default",
     617             :         .type         = AVMEDIA_TYPE_VIDEO,
     618             :         .filter_frame = filter_frame,
     619             :     },
     620             :     { NULL }
     621             : };
     622             : 
     623             : static const AVFilterPad avfilter_vf_scale_outputs[] = {
     624             :     {
     625             :         .name         = "default",
     626             :         .type         = AVMEDIA_TYPE_VIDEO,
     627             :         .config_props = config_props,
     628             :     },
     629             :     { NULL }
     630             : };
     631             : 
     632             : AVFilter ff_vf_scale = {
     633             :     .name            = "scale",
     634             :     .description     = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
     635             :     .init_dict       = init_dict,
     636             :     .uninit          = uninit,
     637             :     .query_formats   = query_formats,
     638             :     .priv_size       = sizeof(ScaleContext),
     639             :     .priv_class      = &scale_class,
     640             :     .inputs          = avfilter_vf_scale_inputs,
     641             :     .outputs         = avfilter_vf_scale_outputs,
     642             :     .process_command = process_command,
     643             : };
     644             : 
     645             : static const AVClass scale2ref_class = {
     646             :     .class_name       = "scale2ref",
     647             :     .item_name        = av_default_item_name,
     648             :     .option           = scale_options,
     649             :     .version          = LIBAVUTIL_VERSION_INT,
     650             :     .category         = AV_CLASS_CATEGORY_FILTER,
     651             :     .child_class_next = child_class_next,
     652             : };
     653             : 
     654             : static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
     655             :     {
     656             :         .name         = "default",
     657             :         .type         = AVMEDIA_TYPE_VIDEO,
     658             :         .filter_frame = filter_frame,
     659             :     },
     660             :     {
     661             :         .name         = "ref",
     662             :         .type         = AVMEDIA_TYPE_VIDEO,
     663             :         .filter_frame = filter_frame_ref,
     664             :     },
     665             :     { NULL }
     666             : };
     667             : 
     668             : static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
     669             :     {
     670             :         .name         = "default",
     671             :         .type         = AVMEDIA_TYPE_VIDEO,
     672             :         .config_props = config_props,
     673             :         .request_frame= request_frame,
     674             :     },
     675             :     {
     676             :         .name         = "ref",
     677             :         .type         = AVMEDIA_TYPE_VIDEO,
     678             :         .config_props = config_props_ref,
     679             :         .request_frame= request_frame_ref,
     680             :     },
     681             :     { NULL }
     682             : };
     683             : 
     684             : AVFilter ff_vf_scale2ref = {
     685             :     .name            = "scale2ref",
     686             :     .description     = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
     687             :     .init_dict       = init_dict,
     688             :     .uninit          = uninit,
     689             :     .query_formats   = query_formats,
     690             :     .priv_size       = sizeof(ScaleContext),
     691             :     .priv_class      = &scale2ref_class,
     692             :     .inputs          = avfilter_vf_scale2ref_inputs,
     693             :     .outputs         = avfilter_vf_scale2ref_outputs,
     694             :     .process_command = process_command,
     695             : };

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