LCOV - code coverage report
Current view: top level - libavfilter - vf_fftfilt.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 156 0.0 %
Date: 2017-12-18 20:14:19 Functions: 0 15 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or modify it
       7             :  * under the terms of the GNU Lesser General Public License as published
       8             :  * by the Free Software Foundation; either version 2.1 of the License,
       9             :  * 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             :  * FFT domain filtering.
      24             :  */
      25             : 
      26             : #include "libavfilter/internal.h"
      27             : #include "libavutil/common.h"
      28             : #include "libavutil/imgutils.h"
      29             : #include "libavutil/opt.h"
      30             : #include "libavutil/pixdesc.h"
      31             : #include "libavcodec/avfft.h"
      32             : #include "libavutil/eval.h"
      33             : 
      34             : #define MAX_PLANES 4
      35             : 
      36             : enum EvalMode {
      37             :     EVAL_MODE_INIT,
      38             :     EVAL_MODE_FRAME,
      39             :     EVAL_MODE_NB
      40             : };
      41             : 
      42             : typedef struct FFTFILTContext {
      43             :     const AVClass *class;
      44             : 
      45             :     int eval_mode;
      46             :     int depth;
      47             :     int nb_planes;
      48             :     int planewidth[MAX_PLANES];
      49             :     int planeheight[MAX_PLANES];
      50             : 
      51             :     RDFTContext *hrdft[MAX_PLANES];
      52             :     RDFTContext *vrdft[MAX_PLANES];
      53             :     RDFTContext *ihrdft[MAX_PLANES];
      54             :     RDFTContext *ivrdft[MAX_PLANES];
      55             :     int rdft_hbits[MAX_PLANES];
      56             :     int rdft_vbits[MAX_PLANES];
      57             :     size_t rdft_hlen[MAX_PLANES];
      58             :     size_t rdft_vlen[MAX_PLANES];
      59             :     FFTSample *rdft_hdata[MAX_PLANES];
      60             :     FFTSample *rdft_vdata[MAX_PLANES];
      61             : 
      62             :     int dc[MAX_PLANES];
      63             :     char *weight_str[MAX_PLANES];
      64             :     AVExpr *weight_expr[MAX_PLANES];
      65             :     double *weight[MAX_PLANES];
      66             : 
      67             : } FFTFILTContext;
      68             : 
      69             : static const char *const var_names[] = {   "X",   "Y",   "W",   "H",   "N", NULL        };
      70             : enum                                   { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_N, VAR_VARS_NB };
      71             : 
      72             : enum { Y = 0, U, V };
      73             : 
      74             : #define OFFSET(x) offsetof(FFTFILTContext, x)
      75             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
      76             : 
      77             : static const AVOption fftfilt_options[] = {
      78             :     { "dc_Y",  "adjust gain in Y plane",              OFFSET(dc[Y]),      AV_OPT_TYPE_INT,    {.i64 = 0},      0,     1000,     FLAGS },
      79             :     { "dc_U",  "adjust gain in U plane",              OFFSET(dc[U]),      AV_OPT_TYPE_INT,    {.i64 = 0},      0,     1000,     FLAGS },
      80             :     { "dc_V",  "adjust gain in V plane",              OFFSET(dc[V]),      AV_OPT_TYPE_INT,    {.i64 = 0},      0,     1000,     FLAGS },
      81             :     { "weight_Y", "set luminance expression in Y plane",   OFFSET(weight_str[Y]), AV_OPT_TYPE_STRING, {.str = "1"}, CHAR_MIN, CHAR_MAX, FLAGS },
      82             :     { "weight_U", "set chrominance expression in U plane", OFFSET(weight_str[U]), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
      83             :     { "weight_V", "set chrominance expression in V plane", OFFSET(weight_str[V]), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
      84             :     { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
      85             :          { "init",  "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT},  .flags = FLAGS, .unit = "eval" },
      86             :          { "frame", "eval expressions per-frame",                  0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
      87             :     {NULL},
      88             : };
      89             : 
      90             : AVFILTER_DEFINE_CLASS(fftfilt);
      91             : 
      92           0 : static inline double lum(void *priv, double x, double y, int plane)
      93             : {
      94           0 :     FFTFILTContext *s = priv;
      95           0 :     return s->rdft_vdata[plane][(int)x * s->rdft_vlen[plane] + (int)y];
      96             : }
      97             : 
      98           0 : static double weight_Y(void *priv, double x, double y) { return lum(priv, x, y, Y); }
      99           0 : static double weight_U(void *priv, double x, double y) { return lum(priv, x, y, U); }
     100           0 : static double weight_V(void *priv, double x, double y) { return lum(priv, x, y, V); }
     101             : 
     102           0 : static void copy_rev (FFTSample *dest, int w, int w2)
     103             : {
     104             :     int i;
     105             : 
     106           0 :     for (i = w; i < w + (w2-w)/2; i++)
     107           0 :         dest[i] = dest[2*w - i - 1];
     108             : 
     109           0 :     for (; i < w2; i++)
     110           0 :         dest[i] = dest[w2 - i];
     111           0 : }
     112             : 
     113             : /*Horizontal pass - RDFT*/
     114           0 : static void rdft_horizontal(FFTFILTContext *s, AVFrame *in, int w, int h, int plane)
     115             : {
     116             :     int i, j;
     117             : 
     118           0 :     for (i = 0; i < h; i++) {
     119           0 :         for (j = 0; j < w; j++)
     120           0 :             s->rdft_hdata[plane][i * s->rdft_hlen[plane] + j] = *(in->data[plane] + in->linesize[plane] * i + j);
     121             : 
     122           0 :         copy_rev(s->rdft_hdata[plane] + i * s->rdft_hlen[plane], w, s->rdft_hlen[plane]);
     123             :     }
     124             : 
     125           0 :     for (i = 0; i < h; i++)
     126           0 :         av_rdft_calc(s->hrdft[plane], s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
     127           0 : }
     128             : 
     129             : /*Vertical pass - RDFT*/
     130           0 : static void rdft_vertical(FFTFILTContext *s, int h, int plane)
     131             : {
     132             :     int i, j;
     133             : 
     134           0 :     for (i = 0; i < s->rdft_hlen[plane]; i++) {
     135           0 :         for (j = 0; j < h; j++)
     136           0 :             s->rdft_vdata[plane][i * s->rdft_vlen[plane] + j] =
     137           0 :             s->rdft_hdata[plane][j * s->rdft_hlen[plane] + i];
     138           0 :         copy_rev(s->rdft_vdata[plane] + i * s->rdft_vlen[plane], h, s->rdft_vlen[plane]);
     139             :     }
     140             : 
     141           0 :     for (i = 0; i < s->rdft_hlen[plane]; i++)
     142           0 :         av_rdft_calc(s->vrdft[plane], s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
     143           0 : }
     144             : /*Vertical pass - IRDFT*/
     145           0 : static void irdft_vertical(FFTFILTContext *s, int h, int plane)
     146             : {
     147             :     int i, j;
     148             : 
     149           0 :     for (i = 0; i < s->rdft_hlen[plane]; i++)
     150           0 :         av_rdft_calc(s->ivrdft[plane], s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
     151             : 
     152           0 :     for (i = 0; i < s->rdft_hlen[plane]; i++)
     153           0 :         for (j = 0; j < h; j++)
     154           0 :             s->rdft_hdata[plane][j * s->rdft_hlen[plane] + i] =
     155           0 :             s->rdft_vdata[plane][i * s->rdft_vlen[plane] + j];
     156           0 : }
     157             : 
     158             : /*Horizontal pass - IRDFT*/
     159           0 : static void irdft_horizontal(FFTFILTContext *s, AVFrame *out, int w, int h, int plane)
     160             : {
     161             :     int i, j;
     162             : 
     163           0 :     for (i = 0; i < h; i++)
     164           0 :         av_rdft_calc(s->ihrdft[plane], s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
     165             : 
     166           0 :     for (i = 0; i < h; i++)
     167           0 :         for (j = 0; j < w; j++)
     168           0 :             *(out->data[plane] + out->linesize[plane] * i + j) = av_clip(s->rdft_hdata[plane][i
     169           0 :                                                                          *s->rdft_hlen[plane] + j] * 4 /
     170           0 :                                                                          (s->rdft_hlen[plane] *
     171           0 :                                                                           s->rdft_vlen[plane]), 0, 255);
     172           0 : }
     173             : 
     174           0 : static av_cold int initialize(AVFilterContext *ctx)
     175             : {
     176           0 :     FFTFILTContext *s = ctx->priv;
     177           0 :     int ret = 0, plane;
     178             : 
     179           0 :     if (!s->dc[U] && !s->dc[V]) {
     180           0 :         s->dc[U] = s->dc[Y];
     181           0 :         s->dc[V] = s->dc[Y];
     182             :     } else {
     183           0 :         if (!s->dc[U]) s->dc[U] = s->dc[V];
     184           0 :         if (!s->dc[V]) s->dc[V] = s->dc[U];
     185             :     }
     186             : 
     187           0 :     if (!s->weight_str[U] && !s->weight_str[V]) {
     188           0 :         s->weight_str[U] = av_strdup(s->weight_str[Y]);
     189           0 :         s->weight_str[V] = av_strdup(s->weight_str[Y]);
     190             :     } else {
     191           0 :         if (!s->weight_str[U]) s->weight_str[U] = av_strdup(s->weight_str[V]);
     192           0 :         if (!s->weight_str[V]) s->weight_str[V] = av_strdup(s->weight_str[U]);
     193             :     }
     194             : 
     195           0 :     for (plane = 0; plane < 3; plane++) {
     196             :         static double (*p[])(void *, double, double) = { weight_Y, weight_U, weight_V };
     197           0 :         const char *const func2_names[] = {"weight_Y", "weight_U", "weight_V", NULL };
     198           0 :         double (*func2[])(void *, double, double) = { weight_Y, weight_U, weight_V, p[plane], NULL };
     199             : 
     200           0 :         ret = av_expr_parse(&s->weight_expr[plane], s->weight_str[plane], var_names,
     201             :                             NULL, NULL, func2_names, func2, 0, ctx);
     202           0 :         if (ret < 0)
     203           0 :             break;
     204             :     }
     205           0 :     return ret;
     206             : }
     207             : 
     208           0 : static void do_eval(FFTFILTContext *s, AVFilterLink *inlink, int plane)
     209             : {
     210             :     double values[VAR_VARS_NB];
     211             :     int i, j;
     212             : 
     213           0 :     values[VAR_N] = inlink->frame_count_out;
     214           0 :     values[VAR_W] = s->planewidth[plane];
     215           0 :     values[VAR_H] = s->planeheight[plane];
     216             : 
     217           0 :     for (i = 0; i < s->rdft_hlen[plane]; i++) {
     218           0 :         values[VAR_X] = i;
     219           0 :         for (j = 0; j < s->rdft_vlen[plane]; j++) {
     220           0 :             values[VAR_Y] = j;
     221           0 :             s->weight[plane][i * s->rdft_vlen[plane] + j] =
     222           0 :             av_expr_eval(s->weight_expr[plane], values, s);
     223             :         }
     224             :     }
     225           0 : }
     226             : 
     227           0 : static int config_props(AVFilterLink *inlink)
     228             : {
     229           0 :     FFTFILTContext *s = inlink->dst->priv;
     230             :     const AVPixFmtDescriptor *desc;
     231             :     int rdft_hbits, rdft_vbits, i, plane;
     232             : 
     233           0 :     desc = av_pix_fmt_desc_get(inlink->format);
     234           0 :     s->depth = desc->comp[0].depth;
     235           0 :     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
     236           0 :     s->planewidth[0] = s->planewidth[3] = inlink->w;
     237           0 :     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
     238           0 :     s->planeheight[0] = s->planeheight[3] = inlink->h;
     239             : 
     240           0 :     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
     241             : 
     242           0 :     for (i = 0; i < desc->nb_components; i++) {
     243           0 :         int w = s->planewidth[i];
     244           0 :         int h = s->planeheight[i];
     245             : 
     246             :         /* RDFT - Array initialization for Horizontal pass*/
     247           0 :         for (rdft_hbits = 1; 1 << rdft_hbits < w*10/9; rdft_hbits++);
     248           0 :         s->rdft_hbits[i] = rdft_hbits;
     249           0 :         s->rdft_hlen[i] = 1 << rdft_hbits;
     250           0 :         if (!(s->rdft_hdata[i] = av_malloc_array(h, s->rdft_hlen[i] * sizeof(FFTSample))))
     251           0 :             return AVERROR(ENOMEM);
     252             : 
     253           0 :         if (!(s->hrdft[i] = av_rdft_init(s->rdft_hbits[i], DFT_R2C)))
     254           0 :             return AVERROR(ENOMEM);
     255           0 :         if (!(s->ihrdft[i] = av_rdft_init(s->rdft_hbits[i], IDFT_C2R)))
     256           0 :             return AVERROR(ENOMEM);
     257             : 
     258             :         /* RDFT - Array initialization for Vertical pass*/
     259           0 :         for (rdft_vbits = 1; 1 << rdft_vbits < h*10/9; rdft_vbits++);
     260           0 :         s->rdft_vbits[i] = rdft_vbits;
     261           0 :         s->rdft_vlen[i] = 1 << rdft_vbits;
     262           0 :         if (!(s->rdft_vdata[i] = av_malloc_array(s->rdft_hlen[i], s->rdft_vlen[i] * sizeof(FFTSample))))
     263           0 :             return AVERROR(ENOMEM);
     264             : 
     265           0 :         if (!(s->vrdft[i] = av_rdft_init(s->rdft_vbits[i], DFT_R2C)))
     266           0 :             return AVERROR(ENOMEM);
     267           0 :         if (!(s->ivrdft[i] = av_rdft_init(s->rdft_vbits[i], IDFT_C2R)))
     268           0 :             return AVERROR(ENOMEM);
     269             :     }
     270             : 
     271             :     /*Luminance value - Array initialization*/
     272           0 :     for (plane = 0; plane < 3; plane++) {
     273           0 :         if(!(s->weight[plane] = av_malloc_array(s->rdft_hlen[plane], s->rdft_vlen[plane] * sizeof(double))))
     274           0 :             return AVERROR(ENOMEM);
     275             : 
     276           0 :         if (s->eval_mode == EVAL_MODE_INIT)
     277           0 :             do_eval(s, inlink, plane);
     278             :     }
     279           0 :     return 0;
     280             : }
     281             : 
     282           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     283             : {
     284           0 :     AVFilterContext *ctx = inlink->dst;
     285           0 :     AVFilterLink *outlink = inlink->dst->outputs[0];
     286           0 :     FFTFILTContext *s = ctx->priv;
     287             :     AVFrame *out;
     288             :     int i, j, plane;
     289             : 
     290           0 :     out = ff_get_video_buffer(outlink, inlink->w, inlink->h);
     291           0 :     if (!out) {
     292           0 :         av_frame_free(&in);
     293           0 :         return AVERROR(ENOMEM);
     294             :     }
     295             : 
     296           0 :     av_frame_copy_props(out, in);
     297             : 
     298           0 :     for (plane = 0; plane < s->nb_planes; plane++) {
     299           0 :         int w = s->planewidth[plane];
     300           0 :         int h = s->planeheight[plane];
     301             : 
     302           0 :         if (s->eval_mode == EVAL_MODE_FRAME)
     303           0 :             do_eval(s, inlink, plane);
     304             : 
     305           0 :         rdft_horizontal(s, in, w, h, plane);
     306           0 :         rdft_vertical(s, h, plane);
     307             : 
     308             :         /*Change user defined parameters*/
     309           0 :         for (i = 0; i < s->rdft_hlen[plane]; i++)
     310           0 :             for (j = 0; j < s->rdft_vlen[plane]; j++)
     311           0 :                 s->rdft_vdata[plane][i * s->rdft_vlen[plane] + j] *=
     312           0 :                   s->weight[plane][i * s->rdft_vlen[plane] + j];
     313             : 
     314           0 :         s->rdft_vdata[plane][0] += s->rdft_hlen[plane] * s->rdft_vlen[plane] * s->dc[plane];
     315             : 
     316           0 :         irdft_vertical(s, h, plane);
     317           0 :         irdft_horizontal(s, out, w, h, plane);
     318             :     }
     319             : 
     320           0 :     av_frame_free(&in);
     321           0 :     return ff_filter_frame(outlink, out);
     322             : }
     323             : 
     324           0 : static av_cold void uninit(AVFilterContext *ctx)
     325             : {
     326           0 :     FFTFILTContext *s = ctx->priv;
     327             :     int i;
     328           0 :     for (i = 0; i < MAX_PLANES; i++) {
     329           0 :         av_free(s->rdft_hdata[i]);
     330           0 :         av_free(s->rdft_vdata[i]);
     331           0 :         av_expr_free(s->weight_expr[i]);
     332           0 :         av_free(s->weight[i]);
     333           0 :         av_rdft_end(s->hrdft[i]);
     334           0 :         av_rdft_end(s->ihrdft[i]);
     335           0 :         av_rdft_end(s->vrdft[i]);
     336           0 :         av_rdft_end(s->ivrdft[i]);
     337             :     }
     338           0 : }
     339             : 
     340           0 : static int query_formats(AVFilterContext *ctx)
     341             : {
     342             :     static const enum AVPixelFormat pixel_fmts_fftfilt[] = {
     343             :         AV_PIX_FMT_GRAY8,
     344             :         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
     345             :         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
     346             :         AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
     347             :         AV_PIX_FMT_NONE
     348             :     };
     349             : 
     350           0 :     AVFilterFormats *fmts_list = ff_make_format_list(pixel_fmts_fftfilt);
     351           0 :     if (!fmts_list)
     352           0 :         return AVERROR(ENOMEM);
     353           0 :     return ff_set_common_formats(ctx, fmts_list);
     354             : }
     355             : 
     356             : static const AVFilterPad fftfilt_inputs[] = {
     357             :     {
     358             :         .name = "default",
     359             :         .type = AVMEDIA_TYPE_VIDEO,
     360             :         .config_props = config_props,
     361             :         .filter_frame = filter_frame,
     362             :     },
     363             :     { NULL }
     364             : };
     365             : 
     366             : static const AVFilterPad fftfilt_outputs[] = {
     367             :     {
     368             :         .name = "default",
     369             :         .type = AVMEDIA_TYPE_VIDEO,
     370             :     },
     371             :     { NULL }
     372             : };
     373             : 
     374             : AVFilter ff_vf_fftfilt = {
     375             :     .name            = "fftfilt",
     376             :     .description     = NULL_IF_CONFIG_SMALL("Apply arbitrary expressions to pixels in frequency domain."),
     377             :     .priv_size       = sizeof(FFTFILTContext),
     378             :     .priv_class      = &fftfilt_class,
     379             :     .inputs          = fftfilt_inputs,
     380             :     .outputs         = fftfilt_outputs,
     381             :     .query_formats   = query_formats,
     382             :     .init            = initialize,
     383             :     .uninit          = uninit,
     384             :     .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
     385             : };

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