LCOV - code coverage report
Current view: top level - libavfilter - f_select.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 160 196 81.6 %
Date: 2017-12-11 04:34:20 Functions: 10 11 90.9 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2011 Stefano Sabatini
       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             :  * filter for selecting which frame passes in the filterchain
      24             :  */
      25             : 
      26             : #include "libavutil/avstring.h"
      27             : #include "libavutil/eval.h"
      28             : #include "libavutil/fifo.h"
      29             : #include "libavutil/internal.h"
      30             : #include "libavutil/opt.h"
      31             : #include "libavutil/pixelutils.h"
      32             : #include "avfilter.h"
      33             : #include "audio.h"
      34             : #include "formats.h"
      35             : #include "internal.h"
      36             : #include "video.h"
      37             : 
      38             : static const char *const var_names[] = {
      39             :     "TB",                ///< timebase
      40             : 
      41             :     "pts",               ///< original pts in the file of the frame
      42             :     "start_pts",         ///< first PTS in the stream, expressed in TB units
      43             :     "prev_pts",          ///< previous frame PTS
      44             :     "prev_selected_pts", ///< previous selected frame PTS
      45             : 
      46             :     "t",                 ///< timestamp expressed in seconds
      47             :     "start_t",           ///< first PTS in the stream, expressed in seconds
      48             :     "prev_t",            ///< previous frame time
      49             :     "prev_selected_t",   ///< previously selected time
      50             : 
      51             :     "pict_type",         ///< the type of picture in the movie
      52             :     "I",
      53             :     "P",
      54             :     "B",
      55             :     "S",
      56             :     "SI",
      57             :     "SP",
      58             :     "BI",
      59             :     "PICT_TYPE_I",
      60             :     "PICT_TYPE_P",
      61             :     "PICT_TYPE_B",
      62             :     "PICT_TYPE_S",
      63             :     "PICT_TYPE_SI",
      64             :     "PICT_TYPE_SP",
      65             :     "PICT_TYPE_BI",
      66             : 
      67             :     "interlace_type",    ///< the frame interlace type
      68             :     "PROGRESSIVE",
      69             :     "TOPFIRST",
      70             :     "BOTTOMFIRST",
      71             : 
      72             :     "consumed_samples_n",///< number of samples consumed by the filter (only audio)
      73             :     "samples_n",         ///< number of samples in the current frame (only audio)
      74             :     "sample_rate",       ///< sample rate (only audio)
      75             : 
      76             :     "n",                 ///< frame number (starting from zero)
      77             :     "selected_n",        ///< selected frame number (starting from zero)
      78             :     "prev_selected_n",   ///< number of the last selected frame
      79             : 
      80             :     "key",               ///< tell if the frame is a key frame
      81             :     "pos",               ///< original position in the file of the frame
      82             : 
      83             :     "scene",
      84             : 
      85             :     "concatdec_select",  ///< frame is within the interval set by the concat demuxer
      86             : 
      87             :     NULL
      88             : };
      89             : 
      90             : enum var_name {
      91             :     VAR_TB,
      92             : 
      93             :     VAR_PTS,
      94             :     VAR_START_PTS,
      95             :     VAR_PREV_PTS,
      96             :     VAR_PREV_SELECTED_PTS,
      97             : 
      98             :     VAR_T,
      99             :     VAR_START_T,
     100             :     VAR_PREV_T,
     101             :     VAR_PREV_SELECTED_T,
     102             : 
     103             :     VAR_PICT_TYPE,
     104             :     VAR_I,
     105             :     VAR_P,
     106             :     VAR_B,
     107             :     VAR_S,
     108             :     VAR_SI,
     109             :     VAR_SP,
     110             :     VAR_BI,
     111             :     VAR_PICT_TYPE_I,
     112             :     VAR_PICT_TYPE_P,
     113             :     VAR_PICT_TYPE_B,
     114             :     VAR_PICT_TYPE_S,
     115             :     VAR_PICT_TYPE_SI,
     116             :     VAR_PICT_TYPE_SP,
     117             :     VAR_PICT_TYPE_BI,
     118             : 
     119             :     VAR_INTERLACE_TYPE,
     120             :     VAR_INTERLACE_TYPE_P,
     121             :     VAR_INTERLACE_TYPE_T,
     122             :     VAR_INTERLACE_TYPE_B,
     123             : 
     124             :     VAR_CONSUMED_SAMPLES_N,
     125             :     VAR_SAMPLES_N,
     126             :     VAR_SAMPLE_RATE,
     127             : 
     128             :     VAR_N,
     129             :     VAR_SELECTED_N,
     130             :     VAR_PREV_SELECTED_N,
     131             : 
     132             :     VAR_KEY,
     133             :     VAR_POS,
     134             : 
     135             :     VAR_SCENE,
     136             : 
     137             :     VAR_CONCATDEC_SELECT,
     138             : 
     139             :     VAR_VARS_NB
     140             : };
     141             : 
     142             : typedef struct SelectContext {
     143             :     const AVClass *class;
     144             :     char *expr_str;
     145             :     AVExpr *expr;
     146             :     double var_values[VAR_VARS_NB];
     147             :     int do_scene_detect;            ///< 1 if the expression requires scene detection variables, 0 otherwise
     148             :     av_pixelutils_sad_fn sad;       ///< Sum of the absolute difference function (scene detect only)
     149             :     double prev_mafd;               ///< previous MAFD                           (scene detect only)
     150             :     AVFrame *prev_picref;           ///< previous frame                          (scene detect only)
     151             :     double select;
     152             :     int select_out;                 ///< mark the selected output pad index
     153             :     int nb_outputs;
     154             : } SelectContext;
     155             : 
     156             : #define OFFSET(x) offsetof(SelectContext, x)
     157             : #define DEFINE_OPTIONS(filt_name, FLAGS)                            \
     158             : static const AVOption filt_name##_options[] = {                     \
     159             :     { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
     160             :     { "e",    "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
     161             :     { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
     162             :     { "n",       "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
     163             :     { NULL }                                                            \
     164             : }
     165             : 
     166             : static int request_frame(AVFilterLink *outlink);
     167             : 
     168           3 : static av_cold int init(AVFilterContext *ctx)
     169             : {
     170           3 :     SelectContext *select = ctx->priv;
     171             :     int i, ret;
     172             : 
     173           3 :     if ((ret = av_expr_parse(&select->expr, select->expr_str,
     174             :                              var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
     175           0 :         av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
     176             :                select->expr_str);
     177           0 :         return ret;
     178             :     }
     179           3 :     select->do_scene_detect = !!strstr(select->expr_str, "scene");
     180             : 
     181          12 :     for (i = 0; i < select->nb_outputs; i++) {
     182           3 :         AVFilterPad pad = { 0 };
     183             : 
     184           3 :         pad.name = av_asprintf("output%d", i);
     185           3 :         if (!pad.name)
     186           0 :             return AVERROR(ENOMEM);
     187           3 :         pad.type = ctx->filter->inputs[0].type;
     188           3 :         pad.request_frame = request_frame;
     189           3 :         if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
     190           0 :             av_freep(&pad.name);
     191           0 :             return ret;
     192             :         }
     193             :     }
     194             : 
     195           3 :     return 0;
     196             : }
     197             : 
     198             : #define INTERLACE_TYPE_P 0
     199             : #define INTERLACE_TYPE_T 1
     200             : #define INTERLACE_TYPE_B 2
     201             : 
     202           3 : static int config_input(AVFilterLink *inlink)
     203             : {
     204           3 :     SelectContext *select = inlink->dst->priv;
     205             : 
     206           3 :     select->var_values[VAR_N]          = 0.0;
     207           3 :     select->var_values[VAR_SELECTED_N] = 0.0;
     208             : 
     209           3 :     select->var_values[VAR_TB] = av_q2d(inlink->time_base);
     210             : 
     211           3 :     select->var_values[VAR_PREV_PTS]          = NAN;
     212           3 :     select->var_values[VAR_PREV_SELECTED_PTS] = NAN;
     213           3 :     select->var_values[VAR_PREV_SELECTED_T]   = NAN;
     214           3 :     select->var_values[VAR_PREV_T]            = NAN;
     215           3 :     select->var_values[VAR_START_PTS]         = NAN;
     216           3 :     select->var_values[VAR_START_T]           = NAN;
     217             : 
     218           3 :     select->var_values[VAR_I]  = AV_PICTURE_TYPE_I;
     219           3 :     select->var_values[VAR_P]  = AV_PICTURE_TYPE_P;
     220           3 :     select->var_values[VAR_B]  = AV_PICTURE_TYPE_B;
     221           3 :     select->var_values[VAR_SI] = AV_PICTURE_TYPE_SI;
     222           3 :     select->var_values[VAR_SP] = AV_PICTURE_TYPE_SP;
     223           3 :     select->var_values[VAR_BI] = AV_PICTURE_TYPE_BI;
     224           3 :     select->var_values[VAR_PICT_TYPE_I]  = AV_PICTURE_TYPE_I;
     225           3 :     select->var_values[VAR_PICT_TYPE_P]  = AV_PICTURE_TYPE_P;
     226           3 :     select->var_values[VAR_PICT_TYPE_B]  = AV_PICTURE_TYPE_B;
     227           3 :     select->var_values[VAR_PICT_TYPE_SI] = AV_PICTURE_TYPE_SI;
     228           3 :     select->var_values[VAR_PICT_TYPE_SP] = AV_PICTURE_TYPE_SP;
     229           3 :     select->var_values[VAR_PICT_TYPE_BI] = AV_PICTURE_TYPE_BI;
     230             : 
     231           3 :     select->var_values[VAR_INTERLACE_TYPE_P] = INTERLACE_TYPE_P;
     232           3 :     select->var_values[VAR_INTERLACE_TYPE_T] = INTERLACE_TYPE_T;
     233           3 :     select->var_values[VAR_INTERLACE_TYPE_B] = INTERLACE_TYPE_B;
     234             : 
     235           3 :     select->var_values[VAR_PICT_TYPE]         = NAN;
     236           3 :     select->var_values[VAR_INTERLACE_TYPE]    = NAN;
     237           3 :     select->var_values[VAR_SCENE]             = NAN;
     238           3 :     select->var_values[VAR_CONSUMED_SAMPLES_N] = NAN;
     239           3 :     select->var_values[VAR_SAMPLES_N]          = NAN;
     240             : 
     241           3 :     select->var_values[VAR_SAMPLE_RATE] =
     242           3 :         inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
     243             : 
     244           3 :     if (select->do_scene_detect) {
     245           1 :         select->sad = av_pixelutils_get_sad_fn(3, 3, 2, select); // 8x8 both sources aligned
     246           1 :         if (!select->sad)
     247           0 :             return AVERROR(EINVAL);
     248             :     }
     249           3 :     return 0;
     250             : }
     251             : 
     252        1308 : static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
     253             : {
     254        1308 :     double ret = 0;
     255        1308 :     SelectContext *select = ctx->priv;
     256        1308 :     AVFrame *prev_picref = select->prev_picref;
     257             : 
     258        2615 :     if (prev_picref &&
     259        2614 :         frame->height == prev_picref->height &&
     260        1307 :         frame->width  == prev_picref->width) {
     261        1307 :         int x, y, nb_sad = 0;
     262        1307 :         int64_t sad = 0;
     263             :         double mafd, diff;
     264        1307 :         uint8_t *p1 =      frame->data[0];
     265        1307 :         uint8_t *p2 = prev_picref->data[0];
     266        1307 :         const int p1_linesize =       frame->linesize[0];
     267        1307 :         const int p2_linesize = prev_picref->linesize[0];
     268             : 
     269       40517 :         for (y = 0; y < frame->height - 7; y += 8) {
     270     4744410 :             for (x = 0; x < frame->width*3 - 7; x += 8) {
     271     4705200 :                 sad += select->sad(p1 + x, p1_linesize, p2 + x, p2_linesize);
     272     4705200 :                 nb_sad += 8 * 8;
     273             :             }
     274       39210 :             p1 += 8 * p1_linesize;
     275       39210 :             p2 += 8 * p2_linesize;
     276             :         }
     277        1307 :         emms_c();
     278        1307 :         mafd = nb_sad ? (double)sad / nb_sad : 0;
     279        1307 :         diff = fabs(mafd - select->prev_mafd);
     280        1307 :         ret  = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
     281        1307 :         select->prev_mafd = mafd;
     282        1307 :         av_frame_free(&prev_picref);
     283             :     }
     284        1308 :     select->prev_picref = av_frame_clone(frame);
     285        1308 :     return ret;
     286             : }
     287             : 
     288        1408 : static double get_concatdec_select(AVFrame *frame, int64_t pts)
     289             : {
     290        1408 :     AVDictionary *metadata = frame->metadata;
     291        1408 :     AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
     292        1408 :     AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
     293        1408 :     if (start_time_entry) {
     294           0 :         int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
     295           0 :         if (pts >= start_time) {
     296           0 :             if (duration_entry) {
     297           0 :               int64_t duration = strtoll(duration_entry->value, NULL, 10);
     298           0 :               if (pts < start_time + duration)
     299           0 :                   return -1;
     300             :               else
     301           0 :                   return 0;
     302             :             }
     303           0 :             return -1;
     304             :         }
     305           0 :         return 0;
     306             :     }
     307        1408 :     return NAN;
     308             : }
     309             : 
     310             : #define D2TS(d)  (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
     311             : #define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
     312             : 
     313        1408 : static void select_frame(AVFilterContext *ctx, AVFrame *frame)
     314             : {
     315        1408 :     SelectContext *select = ctx->priv;
     316        1408 :     AVFilterLink *inlink = ctx->inputs[0];
     317             :     double res;
     318             : 
     319        1408 :     if (isnan(select->var_values[VAR_START_PTS]))
     320           3 :         select->var_values[VAR_START_PTS] = TS2D(frame->pts);
     321        1408 :     if (isnan(select->var_values[VAR_START_T]))
     322           3 :         select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
     323             : 
     324        1408 :     select->var_values[VAR_N  ] = inlink->frame_count_out;
     325        1408 :     select->var_values[VAR_PTS] = TS2D(frame->pts);
     326        1408 :     select->var_values[VAR_T  ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
     327        1408 :     select->var_values[VAR_POS] = frame->pkt_pos == -1 ? NAN : frame->pkt_pos;
     328        1408 :     select->var_values[VAR_KEY] = frame->key_frame;
     329        1408 :     select->var_values[VAR_CONCATDEC_SELECT] = get_concatdec_select(frame, av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q));
     330             : 
     331        1408 :     switch (inlink->type) {
     332           0 :     case AVMEDIA_TYPE_AUDIO:
     333           0 :         select->var_values[VAR_SAMPLES_N] = frame->nb_samples;
     334           0 :         break;
     335             : 
     336        1408 :     case AVMEDIA_TYPE_VIDEO:
     337        1408 :         select->var_values[VAR_INTERLACE_TYPE] =
     338        1408 :             !frame->interlaced_frame ? INTERLACE_TYPE_P :
     339           0 :         frame->top_field_first ? INTERLACE_TYPE_T : INTERLACE_TYPE_B;
     340        1408 :         select->var_values[VAR_PICT_TYPE] = frame->pict_type;
     341        1408 :         if (select->do_scene_detect) {
     342             :             char buf[32];
     343        1308 :             select->var_values[VAR_SCENE] = get_scene_score(ctx, frame);
     344             :             // TODO: document metadata
     345        1308 :             snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
     346        1308 :             av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
     347             :         }
     348        1408 :         break;
     349             :     }
     350             : 
     351        1408 :     select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
     352        1408 :     av_log(inlink->dst, AV_LOG_DEBUG,
     353             :            "n:%f pts:%f t:%f key:%d",
     354             :            select->var_values[VAR_N],
     355             :            select->var_values[VAR_PTS],
     356             :            select->var_values[VAR_T],
     357             :            frame->key_frame);
     358             : 
     359        1408 :     switch (inlink->type) {
     360        1408 :     case AVMEDIA_TYPE_VIDEO:
     361        4224 :         av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
     362        1408 :                (!frame->interlaced_frame) ? 'P' :
     363           0 :                frame->top_field_first     ? 'T' : 'B',
     364        1408 :                av_get_picture_type_char(frame->pict_type),
     365             :                select->var_values[VAR_SCENE]);
     366        1408 :         break;
     367           0 :     case AVMEDIA_TYPE_AUDIO:
     368           0 :         av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
     369             :                frame->nb_samples,
     370             :                select->var_values[VAR_CONSUMED_SAMPLES_N]);
     371           0 :         break;
     372             :     }
     373             : 
     374        1408 :     if (res == 0) {
     375        1356 :         select->select_out = -1; /* drop */
     376          52 :     } else if (isnan(res) || res < 0) {
     377           0 :         select->select_out = 0; /* first output */
     378             :     } else {
     379          52 :         select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
     380             :     }
     381             : 
     382        1408 :     av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
     383             : 
     384        1408 :     if (res) {
     385          52 :         select->var_values[VAR_PREV_SELECTED_N]   = select->var_values[VAR_N];
     386          52 :         select->var_values[VAR_PREV_SELECTED_PTS] = select->var_values[VAR_PTS];
     387          52 :         select->var_values[VAR_PREV_SELECTED_T]   = select->var_values[VAR_T];
     388          52 :         select->var_values[VAR_SELECTED_N] += 1.0;
     389          52 :         if (inlink->type == AVMEDIA_TYPE_AUDIO)
     390           0 :             select->var_values[VAR_CONSUMED_SAMPLES_N] += frame->nb_samples;
     391             :     }
     392             : 
     393        1408 :     select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
     394        1408 :     select->var_values[VAR_PREV_T]   = select->var_values[VAR_T];
     395        1408 : }
     396             : 
     397        1408 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     398             : {
     399        1408 :     AVFilterContext *ctx = inlink->dst;
     400        1408 :     SelectContext *select = ctx->priv;
     401             : 
     402        1408 :     select_frame(ctx, frame);
     403        1408 :     if (select->select)
     404          52 :         return ff_filter_frame(ctx->outputs[select->select_out], frame);
     405             : 
     406        1356 :     av_frame_free(&frame);
     407        1356 :     return 0;
     408             : }
     409             : 
     410        1412 : static int request_frame(AVFilterLink *outlink)
     411             : {
     412        1412 :     AVFilterLink *inlink = outlink->src->inputs[0];
     413        1412 :     int ret = ff_request_frame(inlink);
     414        1412 :     return ret;
     415             : }
     416             : 
     417           3 : static av_cold void uninit(AVFilterContext *ctx)
     418             : {
     419           3 :     SelectContext *select = ctx->priv;
     420             :     int i;
     421             : 
     422           3 :     av_expr_free(select->expr);
     423           3 :     select->expr = NULL;
     424             : 
     425           6 :     for (i = 0; i < ctx->nb_outputs; i++)
     426           3 :         av_freep(&ctx->output_pads[i].name);
     427             : 
     428           3 :     if (select->do_scene_detect) {
     429           1 :         av_frame_free(&select->prev_picref);
     430             :     }
     431           3 : }
     432             : 
     433           3 : static int query_formats(AVFilterContext *ctx)
     434             : {
     435           3 :     SelectContext *select = ctx->priv;
     436             : 
     437           3 :     if (!select->do_scene_detect) {
     438           2 :         return ff_default_query_formats(ctx);
     439             :     } else {
     440             :         int ret;
     441             :         static const enum AVPixelFormat pix_fmts[] = {
     442             :             AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
     443             :             AV_PIX_FMT_NONE
     444             :         };
     445           1 :         AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     446             : 
     447           1 :         if (!fmts_list)
     448           0 :             return AVERROR(ENOMEM);
     449           1 :         ret = ff_set_common_formats(ctx, fmts_list);
     450           1 :         if (ret < 0)
     451           0 :             return ret;
     452             :     }
     453           1 :     return 0;
     454             : }
     455             : 
     456             : #if CONFIG_ASELECT_FILTER
     457             : 
     458             : DEFINE_OPTIONS(aselect, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
     459             : AVFILTER_DEFINE_CLASS(aselect);
     460             : 
     461           0 : static av_cold int aselect_init(AVFilterContext *ctx)
     462             : {
     463           0 :     SelectContext *select = ctx->priv;
     464             :     int ret;
     465             : 
     466           0 :     if ((ret = init(ctx)) < 0)
     467           0 :         return ret;
     468             : 
     469           0 :     if (select->do_scene_detect) {
     470           0 :         av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
     471           0 :         return AVERROR(EINVAL);
     472             :     }
     473             : 
     474           0 :     return 0;
     475             : }
     476             : 
     477             : static const AVFilterPad avfilter_af_aselect_inputs[] = {
     478             :     {
     479             :         .name         = "default",
     480             :         .type         = AVMEDIA_TYPE_AUDIO,
     481             :         .config_props = config_input,
     482             :         .filter_frame = filter_frame,
     483             :     },
     484             :     { NULL }
     485             : };
     486             : 
     487             : AVFilter ff_af_aselect = {
     488             :     .name        = "aselect",
     489             :     .description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
     490             :     .init        = aselect_init,
     491             :     .uninit      = uninit,
     492             :     .priv_size   = sizeof(SelectContext),
     493             :     .inputs      = avfilter_af_aselect_inputs,
     494             :     .priv_class  = &aselect_class,
     495             :     .flags       = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
     496             : };
     497             : #endif /* CONFIG_ASELECT_FILTER */
     498             : 
     499             : #if CONFIG_SELECT_FILTER
     500             : 
     501             : DEFINE_OPTIONS(select, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
     502             : AVFILTER_DEFINE_CLASS(select);
     503             : 
     504           3 : static av_cold int select_init(AVFilterContext *ctx)
     505             : {
     506             :     int ret;
     507             : 
     508           3 :     if ((ret = init(ctx)) < 0)
     509           0 :         return ret;
     510             : 
     511           3 :     return 0;
     512             : }
     513             : 
     514             : static const AVFilterPad avfilter_vf_select_inputs[] = {
     515             :     {
     516             :         .name         = "default",
     517             :         .type         = AVMEDIA_TYPE_VIDEO,
     518             :         .config_props = config_input,
     519             :         .filter_frame = filter_frame,
     520             :     },
     521             :     { NULL }
     522             : };
     523             : 
     524             : AVFilter ff_vf_select = {
     525             :     .name          = "select",
     526             :     .description   = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
     527             :     .init          = select_init,
     528             :     .uninit        = uninit,
     529             :     .query_formats = query_formats,
     530             :     .priv_size     = sizeof(SelectContext),
     531             :     .priv_class    = &select_class,
     532             :     .inputs        = avfilter_vf_select_inputs,
     533             :     .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
     534             : };
     535             : #endif /* CONFIG_SELECT_FILTER */

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