LCOV - code coverage report
Current view: top level - libavfilter - vf_fade.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 87 146 59.6 %
Date: 2017-12-13 10:57:33 Functions: 6 9 66.7 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2010 Brandon Mintern
       3             :  * Copyright (c) 2007 Bobby Bingham
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * video fade filter
      25             :  * based heavily on vf_negate.c by Bobby Bingham
      26             :  */
      27             : 
      28             : #include "libavutil/avassert.h"
      29             : #include "libavutil/avstring.h"
      30             : #include "libavutil/common.h"
      31             : #include "libavutil/eval.h"
      32             : #include "libavutil/opt.h"
      33             : #include "libavutil/pixdesc.h"
      34             : #include "avfilter.h"
      35             : #include "drawutils.h"
      36             : #include "formats.h"
      37             : #include "internal.h"
      38             : #include "video.h"
      39             : 
      40             : #define R 0
      41             : #define G 1
      42             : #define B 2
      43             : #define A 3
      44             : 
      45             : #define Y 0
      46             : #define U 1
      47             : #define V 2
      48             : 
      49             : #define FADE_IN  0
      50             : #define FADE_OUT 1
      51             : 
      52             : typedef struct FadeContext {
      53             :     const AVClass *class;
      54             :     int type;
      55             :     int factor, fade_per_frame;
      56             :     int start_frame, nb_frames;
      57             :     int hsub, vsub, bpp;
      58             :     unsigned int black_level, black_level_scaled;
      59             :     uint8_t is_packed_rgb;
      60             :     uint8_t rgba_map[4];
      61             :     int alpha;
      62             :     uint64_t start_time, duration;
      63             :     enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
      64             :     uint8_t color_rgba[4];  ///< fade color
      65             :     int black_fade;         ///< if color_rgba is black
      66             : } FadeContext;
      67             : 
      68           2 : static av_cold int init(AVFilterContext *ctx)
      69             : {
      70           2 :     FadeContext *s = ctx->priv;
      71             : 
      72           2 :     s->fade_per_frame = (1 << 16) / s->nb_frames;
      73           2 :     s->fade_state = VF_FADE_WAITING;
      74             : 
      75           2 :     if (s->duration != 0) {
      76             :         // If duration (seconds) is non-zero, assume that we are not fading based on frames
      77           0 :         s->nb_frames = 0; // Mostly to clean up logging
      78             :     }
      79             : 
      80             :     // Choose what to log. If both time-based and frame-based options, both lines will be in the log
      81           2 :     if (s->start_frame || s->nb_frames) {
      82           4 :         av_log(ctx, AV_LOG_VERBOSE,
      83             :                "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
      84           2 :                s->type == FADE_IN ? "in" : "out", s->start_frame,
      85             :                s->nb_frames,s->alpha);
      86             :     }
      87           2 :     if (s->start_time || s->duration) {
      88           0 :         av_log(ctx, AV_LOG_VERBOSE,
      89             :                "type:%s start_time:%f duration:%f alpha:%d\n",
      90           0 :                s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
      91           0 :                (s->duration / (double)AV_TIME_BASE),s->alpha);
      92             :     }
      93             : 
      94           2 :     s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
      95           2 :     return 0;
      96             : }
      97             : 
      98           2 : static int query_formats(AVFilterContext *ctx)
      99             : {
     100           2 :     const FadeContext *s = ctx->priv;
     101             :     static const enum AVPixelFormat pix_fmts[] = {
     102             :         AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
     103             :         AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
     104             :         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
     105             :         AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ440P,
     106             :         AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
     107             :         AV_PIX_FMT_RGB24,    AV_PIX_FMT_BGR24,
     108             :         AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
     109             :         AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
     110             :         AV_PIX_FMT_NONE
     111             :     };
     112             :     static const enum AVPixelFormat pix_fmts_rgb[] = {
     113             :         AV_PIX_FMT_RGB24,    AV_PIX_FMT_BGR24,
     114             :         AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
     115             :         AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
     116             :         AV_PIX_FMT_NONE
     117             :     };
     118             :     static const enum AVPixelFormat pix_fmts_alpha[] = {
     119             :         AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
     120             :         AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
     121             :         AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
     122             :         AV_PIX_FMT_NONE
     123             :     };
     124             :     static const enum AVPixelFormat pix_fmts_rgba[] = {
     125             :         AV_PIX_FMT_ARGB,     AV_PIX_FMT_ABGR,
     126             :         AV_PIX_FMT_RGBA,     AV_PIX_FMT_BGRA,
     127             :         AV_PIX_FMT_NONE
     128             :     };
     129             :     AVFilterFormats *fmts_list;
     130             : 
     131           2 :     if (s->alpha) {
     132           0 :         if (s->black_fade)
     133           0 :             fmts_list = ff_make_format_list(pix_fmts_alpha);
     134             :         else
     135           0 :             fmts_list = ff_make_format_list(pix_fmts_rgba);
     136             :     } else {
     137           2 :         if (s->black_fade)
     138           2 :             fmts_list = ff_make_format_list(pix_fmts);
     139             :         else
     140           0 :             fmts_list = ff_make_format_list(pix_fmts_rgb);
     141             :     }
     142           2 :     if (!fmts_list)
     143           0 :         return AVERROR(ENOMEM);
     144           2 :     return ff_set_common_formats(ctx, fmts_list);
     145             : }
     146             : 
     147             : const static enum AVPixelFormat studio_level_pix_fmts[] = {
     148             :     AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
     149             :     AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
     150             :     AV_PIX_FMT_YUV440P,
     151             :     AV_PIX_FMT_NONE
     152             : };
     153             : 
     154           2 : static int config_props(AVFilterLink *inlink)
     155             : {
     156           2 :     FadeContext *s = inlink->dst->priv;
     157           2 :     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
     158             : 
     159           2 :     s->hsub = pixdesc->log2_chroma_w;
     160           2 :     s->vsub = pixdesc->log2_chroma_h;
     161             : 
     162           4 :     s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
     163           2 :              1 :
     164           0 :              av_get_bits_per_pixel(pixdesc) >> 3;
     165           2 :     s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
     166           2 :     s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
     167             : 
     168             :     /* use CCIR601/709 black level for studio-level pixel non-alpha components */
     169           2 :     s->black_level =
     170           2 :             ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 : 0;
     171             :     /* 32768 = 1 << 15, it is an integer representation
     172             :      * of 0.5 and is for rounding. */
     173           2 :     s->black_level_scaled = (s->black_level << 16) + 32768;
     174           2 :     return 0;
     175             : }
     176             : 
     177           0 : static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame,
     178             :                                         int slice_start, int slice_end,
     179             :                                         int do_alpha, int step)
     180             : {
     181             :     int i, j;
     182           0 :     const uint8_t r_idx  = s->rgba_map[R];
     183           0 :     const uint8_t g_idx  = s->rgba_map[G];
     184           0 :     const uint8_t b_idx  = s->rgba_map[B];
     185           0 :     const uint8_t a_idx  = s->rgba_map[A];
     186           0 :     const uint8_t *c = s->color_rgba;
     187             : 
     188           0 :     for (i = slice_start; i < slice_end; i++) {
     189           0 :         uint8_t *p = frame->data[0] + i * frame->linesize[0];
     190           0 :         for (j = 0; j < frame->width; j++) {
     191             : #define INTERP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
     192           0 :             p[r_idx] = INTERP(r_idx, 0);
     193           0 :             p[g_idx] = INTERP(g_idx, 1);
     194           0 :             p[b_idx] = INTERP(b_idx, 2);
     195           0 :             if (do_alpha)
     196           0 :                 p[a_idx] = INTERP(a_idx, 3);
     197           0 :             p += step;
     198             :         }
     199             :     }
     200           0 : }
     201             : 
     202           0 : static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
     203             :                             int nb_jobs)
     204             : {
     205           0 :     FadeContext *s = ctx->priv;
     206           0 :     AVFrame *frame = arg;
     207           0 :     int slice_start = (frame->height *  jobnr   ) / nb_jobs;
     208           0 :     int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
     209             : 
     210           0 :     if      (s->alpha)    filter_rgb(s, frame, slice_start, slice_end, 1, 4);
     211           0 :     else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
     212           0 :     else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
     213           0 :     else                  av_assert0(0);
     214             : 
     215           0 :     return 0;
     216             : }
     217             : 
     218         351 : static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
     219             :                              int nb_jobs)
     220             : {
     221         351 :     FadeContext *s = ctx->priv;
     222         351 :     AVFrame *frame = arg;
     223         351 :     int slice_start = (frame->height *  jobnr   ) / nb_jobs;
     224         351 :     int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
     225             :     int i, j;
     226             : 
     227       11583 :     for (i = slice_start; i < slice_end; i++) {
     228       11232 :         uint8_t *p = frame->data[0] + i * frame->linesize[0];
     229     3964896 :         for (j = 0; j < frame->width * s->bpp; j++) {
     230             :             /* s->factor is using 16 lower-order bits for decimal
     231             :              * places. 32768 = 1 << 15, it is an integer representation
     232             :              * of 0.5 and is for rounding. */
     233     3953664 :             *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
     234     3953664 :             p++;
     235             :         }
     236             :     }
     237             : 
     238         351 :     return 0;
     239             : }
     240             : 
     241         351 : static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
     242             :                                int nb_jobs)
     243             : {
     244         351 :     FadeContext *s = ctx->priv;
     245         351 :     AVFrame *frame = arg;
     246             :     int i, j, plane;
     247         351 :     const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
     248         351 :     const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
     249         351 :     int slice_start = (height *  jobnr   ) / nb_jobs;
     250         351 :     int slice_end   = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
     251             : 
     252        1053 :     for (plane = 1; plane < 3; plane++) {
     253       11934 :         for (i = slice_start; i < slice_end; i++) {
     254       11232 :             uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
     255     1988064 :             for (j = 0; j < width; j++) {
     256             :                 /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
     257             :                  * representation of 128.5. The .5 is for rounding
     258             :                  * purposes. */
     259     1976832 :                 *p = ((*p - 128) * s->factor + 8421367) >> 16;
     260     1976832 :                 p++;
     261             :             }
     262             :         }
     263             :     }
     264             : 
     265         351 :     return 0;
     266             : }
     267             : 
     268           0 : static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
     269             :                               int nb_jobs)
     270             : {
     271           0 :     FadeContext *s = ctx->priv;
     272           0 :     AVFrame *frame = arg;
     273           0 :     int plane = s->is_packed_rgb ? 0 : A;
     274           0 :     int slice_start = (frame->height *  jobnr   ) / nb_jobs;
     275           0 :     int slice_end   = (frame->height * (jobnr+1)) / nb_jobs;
     276             :     int i, j;
     277             : 
     278           0 :     for (i = slice_start; i < slice_end; i++) {
     279           0 :         uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
     280           0 :         int step = s->is_packed_rgb ? 4 : 1;
     281           0 :         for (j = 0; j < frame->width; j++) {
     282             :             /* s->factor is using 16 lower-order bits for decimal
     283             :              * places. 32768 = 1 << 15, it is an integer representation
     284             :              * of 0.5 and is for rounding. */
     285           0 :             *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
     286           0 :             p += step;
     287             :         }
     288             :     }
     289             : 
     290           0 :     return 0;
     291             : }
     292             : 
     293         100 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
     294             : {
     295         100 :     AVFilterContext *ctx = inlink->dst;
     296         100 :     FadeContext *s       = ctx->priv;
     297         100 :     double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
     298             : 
     299             :     // Calculate Fade assuming this is a Fade In
     300         100 :     if (s->fade_state == VF_FADE_WAITING) {
     301          37 :         s->factor=0;
     302          37 :         if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
     303          37 :             && inlink->frame_count_out >= s->start_frame) {
     304             :             // Time to start fading
     305           2 :             s->fade_state = VF_FADE_FADING;
     306             : 
     307             :             // Save start time in case we are starting based on frames and fading based on time
     308           2 :             if (s->start_time == 0 && s->start_frame != 0) {
     309           2 :                 s->start_time = frame_timestamp*(double)AV_TIME_BASE;
     310             :             }
     311             : 
     312             :             // Save start frame in case we are starting based on time and fading based on frames
     313           2 :             if (s->start_time != 0 && s->start_frame == 0) {
     314           0 :                 s->start_frame = inlink->frame_count_out;
     315             :             }
     316             :         }
     317             :     }
     318         100 :     if (s->fade_state == VF_FADE_FADING) {
     319          34 :         if (s->duration == 0) {
     320             :             // Fading based on frame count
     321          34 :             s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
     322          34 :             if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
     323           2 :                 s->fade_state = VF_FADE_DONE;
     324             :             }
     325             : 
     326             :         } else {
     327             :             // Fading based on duration
     328           0 :             s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
     329           0 :                             * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
     330           0 :             if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
     331           0 :                                   + s->duration/(double)AV_TIME_BASE) {
     332           0 :                 s->fade_state = VF_FADE_DONE;
     333             :             }
     334             :         }
     335             :     }
     336         100 :     if (s->fade_state == VF_FADE_DONE) {
     337          33 :         s->factor=UINT16_MAX;
     338             :     }
     339             : 
     340         100 :     s->factor = av_clip_uint16(s->factor);
     341             : 
     342             :     // Invert fade_factor if Fading Out
     343         100 :     if (s->type == FADE_OUT) {
     344          50 :         s->factor=UINT16_MAX-s->factor;
     345             :     }
     346             : 
     347         100 :     if (s->factor < UINT16_MAX) {
     348          39 :         if (s->alpha) {
     349           0 :             ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
     350           0 :                                 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
     351          39 :         } else if (s->is_packed_rgb && !s->black_fade) {
     352           0 :             ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
     353           0 :                                    FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
     354             :         } else {
     355             :             /* luma, or rgb plane in case of black */
     356          78 :             ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
     357          39 :                                 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
     358             : 
     359          39 :             if (frame->data[1] && frame->data[2]) {
     360             :                 /* chroma planes */
     361          78 :                 ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL,
     362          39 :                                     FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
     363             :             }
     364             :         }
     365             :     }
     366             : 
     367         100 :     return ff_filter_frame(inlink->dst->outputs[0], frame);
     368             : }
     369             : 
     370             : 
     371             : #define OFFSET(x) offsetof(FadeContext, x)
     372             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
     373             : 
     374             : static const AVOption fade_options[] = {
     375             :     { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
     376             :     { "t",    "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
     377             :         { "in",  "fade-in",  0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN },  .unit = "type" },
     378             :         { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
     379             :     { "start_frame", "Number of the first frame to which to apply the effect.",
     380             :                                                     OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
     381             :     { "s",           "Number of the first frame to which to apply the effect.",
     382             :                                                     OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
     383             :     { "nb_frames",   "Number of frames to which the effect should be applied.",
     384             :                                                     OFFSET(nb_frames),   AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
     385             :     { "n",           "Number of frames to which the effect should be applied.",
     386             :                                                     OFFSET(nb_frames),   AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
     387             :     { "alpha",       "fade alpha if it is available on the input", OFFSET(alpha),       AV_OPT_TYPE_BOOL, {.i64 = 0    }, 0,       1, FLAGS },
     388             :     { "start_time",  "Number of seconds of the beginning of the effect.",
     389             :                                                     OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
     390             :     { "st",          "Number of seconds of the beginning of the effect.",
     391             :                                                     OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
     392             :     { "duration",    "Duration of the effect in seconds.",
     393             :                                                     OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
     394             :     { "d",           "Duration of the effect in seconds.",
     395             :                                                     OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
     396             :     { "color",       "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
     397             :     { "c",           "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
     398             :     { NULL }
     399             : };
     400             : 
     401             : AVFILTER_DEFINE_CLASS(fade);
     402             : 
     403             : static const AVFilterPad avfilter_vf_fade_inputs[] = {
     404             :     {
     405             :         .name           = "default",
     406             :         .type           = AVMEDIA_TYPE_VIDEO,
     407             :         .config_props   = config_props,
     408             :         .filter_frame   = filter_frame,
     409             :         .needs_writable = 1,
     410             :     },
     411             :     { NULL }
     412             : };
     413             : 
     414             : static const AVFilterPad avfilter_vf_fade_outputs[] = {
     415             :     {
     416             :         .name = "default",
     417             :         .type = AVMEDIA_TYPE_VIDEO,
     418             :     },
     419             :     { NULL }
     420             : };
     421             : 
     422             : AVFilter ff_vf_fade = {
     423             :     .name          = "fade",
     424             :     .description   = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
     425             :     .init          = init,
     426             :     .priv_size     = sizeof(FadeContext),
     427             :     .priv_class    = &fade_class,
     428             :     .query_formats = query_formats,
     429             :     .inputs        = avfilter_vf_fade_inputs,
     430             :     .outputs       = avfilter_vf_fade_outputs,
     431             :     .flags         = AVFILTER_FLAG_SLICE_THREADS,
     432             : };

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