lavfi: remove FF_LINK_FLAG_REQUEST_LOOP.

It has no longer any effect.

31 files changed, 2 insertions, 103 deletions

diff --git a/libavfilter/af_afade.c b/libavfilter/af_afade.c
index 7168eba4b5..2f1822203d 100644
--- a/libavfilter/af_afade.c
+++ b/libavfilter/af_afade.c
@@ -611,7 +611,6 @@ static int acrossfade_config_output(AVFilterLink *outlink)
     outlink->time_base   = ctx->inputs[0]->time_base;
     outlink->channel_layout = ctx->inputs[0]->channel_layout;
     outlink->channels = ctx->inputs[0]->channels;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
 
     switch (outlink->format) {
     case AV_SAMPLE_FMT_DBL:  s->crossfade_samples = crossfade_samples_dbl;  break;
diff --git a/libavfilter/af_asetnsamples.c b/libavfilter/af_asetnsamples.c
index 02668e47c8..b5aa193c2d 100644
--- a/libavfilter/af_asetnsamples.c
+++ b/libavfilter/af_asetnsamples.c
@@ -77,7 +77,6 @@ static int config_props_output(AVFilterLink *outlink)
     asns->fifo = av_audio_fifo_alloc(outlink->format, outlink->channels, asns->nb_out_samples);
     if (!asns->fifo)
         return AVERROR(ENOMEM);
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
 
     return 0;
 }
diff --git a/libavfilter/af_atempo.c b/libavfilter/af_atempo.c
index 49d49ee2a9..7b3d57cceb 100644
--- a/libavfilter/af_atempo.c
+++ b/libavfilter/af_atempo.c
@@ -1046,8 +1046,6 @@ static int config_props(AVFilterLink *inlink)
     int sample_rate = (int)inlink->sample_rate;
     int channels = av_get_channel_layout_nb_channels(inlink->channel_layout);
 
-    ctx->outputs[0]->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
     return yae_reset(atempo, format, sample_rate, channels);
 }
 
diff --git a/libavfilter/af_compand.c b/libavfilter/af_compand.c
index 6724121350..3848d67bd9 100644
--- a/libavfilter/af_compand.c
+++ b/libavfilter/af_compand.c
@@ -531,7 +531,6 @@ static int config_output(AVFilterLink *outlink)
     if (err)
         return err;
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     s->compand = compand_delay;
     return 0;
 }
diff --git a/libavfilter/af_dynaudnorm.c b/libavfilter/af_dynaudnorm.c
index e58564871a..8f0c2d0858 100644
--- a/libavfilter/af_dynaudnorm.c
+++ b/libavfilter/af_dynaudnorm.c
@@ -305,12 +305,6 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static inline double fade(double prev, double next, int pos,
                           double *fade_factors[2])
 {
@@ -721,7 +715,6 @@ static const AVFilterPad avfilter_af_dynaudnorm_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_AUDIO,
-        .config_props  = config_output,
         .request_frame = request_frame,
     },
     { NULL }
diff --git a/libavfilter/af_silenceremove.c b/libavfilter/af_silenceremove.c
index 00a3959b10..3389d647af 100644
--- a/libavfilter/af_silenceremove.c
+++ b/libavfilter/af_silenceremove.c
@@ -153,13 +153,6 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
-    return 0;
-}
-
 static double compute_rms(SilenceRemoveContext *s, double sample)
 {
     double new_sum;
@@ -463,7 +456,6 @@ static const AVFilterPad silenceremove_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_AUDIO,
-        .config_props  = config_output,
         .request_frame = request_frame,
     },
     { NULL }
diff --git a/libavfilter/avf_showfreqs.c b/libavfilter/avf_showfreqs.c
index 5dfa2df4d5..8961d3cce5 100644
--- a/libavfilter/avf_showfreqs.c
+++ b/libavfilter/avf_showfreqs.c
@@ -300,7 +300,6 @@ static int config_output(AVFilterLink *outlink)
         s->scale += s->window_func_lut[i] * s->window_func_lut[i];
     }
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
     outlink->sample_aspect_ratio = (AVRational){1,1};
     outlink->w = s->w;
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index b9fadb3d59..51926bfe96 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -1097,7 +1097,6 @@ static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
     int nb_channels = av_frame_get_channels(frame);
     int ret = 0;
 
-    link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     /* Handle framing (min_samples, max_samples) */
     while (insamples) {
         if (!pbuf) {
diff --git a/libavfilter/f_ebur128.c b/libavfilter/f_ebur128.c
index cad1119ee5..1d5c8fd0f1 100644
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@@ -337,8 +337,6 @@ static int config_video_output(AVFilterLink *outlink)
     DRAW_RECT(ebur128->graph);
     DRAW_RECT(ebur128->gauge);
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
     return 0;
 }
 
@@ -398,8 +396,6 @@ static int config_audio_output(AVFilterLink *outlink)
             return AVERROR(ENOMEM);
     }
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
 #if CONFIG_SWRESAMPLE
     if (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS) {
         int ret;
diff --git a/libavfilter/f_interleave.c b/libavfilter/f_interleave.c
index 95401cfb80..e0915b56eb 100644
--- a/libavfilter/f_interleave.c
+++ b/libavfilter/f_interleave.c
@@ -180,8 +180,6 @@ static int config_output(AVFilterLink *outlink)
             }
         }
     }
-
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     return 0;
 }
 
diff --git a/libavfilter/f_reverse.c b/libavfilter/f_reverse.c
index 37c25e9045..5bf71b38ed 100644
--- a/libavfilter/f_reverse.c
+++ b/libavfilter/f_reverse.c
@@ -62,12 +62,6 @@ static av_cold void uninit(AVFilterContext *ctx)
     av_freep(&s->frames);
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -129,7 +123,6 @@ static const AVFilterPad reverse_outputs[] = {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
-        .config_props  = config_output,
     },
     { NULL }
 };
@@ -240,7 +233,6 @@ static const AVFilterPad areverse_outputs[] = {
         .name          = "default",
         .type          = AVMEDIA_TYPE_AUDIO,
         .request_frame = areverse_request_frame,
-        .config_props  = config_output,
     },
     { NULL }
 };
diff --git a/libavfilter/framesync.c b/libavfilter/framesync.c
index bdac40b783..7920cdb379 100644
--- a/libavfilter/framesync.c
+++ b/libavfilter/framesync.c
@@ -322,7 +322,6 @@ int ff_framesync_request_frame(FFFrameSync *fs, AVFilterLink *outlink)
         return 0;
     if (fs->eof)
         return AVERROR_EOF;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     input = fs->in_request;
     ret = ff_request_frame(ctx->inputs[input]);
     if (ret == AVERROR_EOF) {
diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index 1454112433..bb947072e0 100644
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -336,20 +336,6 @@ int ff_request_frame(AVFilterLink *link);
 int ff_filter_frame(AVFilterLink *link, AVFrame *frame);
 
 /**
- * Flags for AVFilterLink.flags.
- */
-enum {
-
-    /**
-     * Frame requests may need to loop in order to be fulfilled.
-     * A filter must set this flags on an output link if it may return 0 in
-     * request_frame() without filtering a frame.
-     */
-    FF_LINK_FLAG_REQUEST_LOOP = 1,
-
-};
-
-/**
  * Allocate a new filter context and return it.
  *
  * @param filter what filter to create an instance of
diff --git a/libavfilter/trim.c b/libavfilter/trim.c
index 468dc03ca1..e8d023ec65 100644
--- a/libavfilter/trim.c
+++ b/libavfilter/trim.c
@@ -114,12 +114,6 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 #define OFFSET(x) offsetof(TrimContext, x)
 #define COMMON_OPTS                                                                                                                                                         \
     { "starti",      "Timestamp of the first frame that "                                                                                                        \
@@ -223,7 +217,6 @@ static const AVFilterPad trim_outputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
-        .config_props = config_output,
     },
     { NULL }
 };
@@ -378,7 +371,6 @@ static const AVFilterPad atrim_outputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_AUDIO,
-        .config_props = config_output,
     },
     { NULL }
 };
diff --git a/libavfilter/vf_atadenoise.c b/libavfilter/vf_atadenoise.c
index 9ce0250471..5127270ab5 100644
--- a/libavfilter/vf_atadenoise.c
+++ b/libavfilter/vf_atadenoise.c
@@ -285,12 +285,6 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -401,7 +395,6 @@ static const AVFilterPad outputs[] = {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
-        .config_props  = config_output,
     },
     { NULL }
 };
diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c
index be92bd15be..ef0e7e46b1 100644
--- a/libavfilter/vf_blend.c
+++ b/libavfilter/vf_blend.c
@@ -467,9 +467,8 @@ static int config_output(AVFilterLink *outlink)
     is_16bit = pix_desc->comp[0].depth == 16;
     s->nb_planes = av_pix_fmt_count_planes(toplink->format);
 
-    if (s->tblend)
-        outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    else if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
+    if (!s->tblend)
+        if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
             return ret;
 
     for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
diff --git a/libavfilter/vf_decimate.c b/libavfilter/vf_decimate.c
index ae15ebe36e..26f3ce0935 100644
--- a/libavfilter/vf_decimate.c
+++ b/libavfilter/vf_decimate.c
@@ -372,7 +372,6 @@ static int config_output(AVFilterLink *outlink)
     fps = av_mul_q(fps, (AVRational){dm->cycle - 1, dm->cycle});
     av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
            inlink->frame_rate.num, inlink->frame_rate.den, fps.num, fps.den);
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->time_base  = inlink->time_base;
     outlink->frame_rate = fps;
     outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
diff --git a/libavfilter/vf_detelecine.c b/libavfilter/vf_detelecine.c
index 44379a3ec7..320e90d052 100644
--- a/libavfilter/vf_detelecine.c
+++ b/libavfilter/vf_detelecine.c
@@ -170,7 +170,6 @@ static int config_output(AVFilterLink *outlink)
     av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
            inlink->frame_rate.num, inlink->frame_rate.den, fps.num, fps.den);
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->frame_rate = fps;
     outlink->time_base = av_mul_q(inlink->time_base, s->pts);
     av_log(ctx, AV_LOG_VERBOSE, "TB: %d/%d -> %d/%d\n",
diff --git a/libavfilter/vf_fieldmatch.c b/libavfilter/vf_fieldmatch.c
index b987e299c0..4225801f9d 100644
--- a/libavfilter/vf_fieldmatch.c
+++ b/libavfilter/vf_fieldmatch.c
@@ -953,7 +953,6 @@ static int config_output(AVFilterLink *outlink)
     const AVFilterLink *inlink =
         ctx->inputs[fm->ppsrc ? INPUT_CLEANSRC : INPUT_MAIN];
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->time_base = inlink->time_base;
     outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
     outlink->frame_rate = inlink->frame_rate;
diff --git a/libavfilter/vf_framerate.c b/libavfilter/vf_framerate.c
index 687b9a50fe..e8fba285d8 100644
--- a/libavfilter/vf_framerate.c
+++ b/libavfilter/vf_framerate.c
@@ -639,7 +639,6 @@ static int config_output(AVFilterLink *outlink)
 
     outlink->frame_rate = s->dest_frame_rate;
     outlink->time_base = s->dest_time_base;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
 
     ff_dlog(ctx,
            "config_output() output time base:%u/%u (%f) w:%d h:%d\n",
diff --git a/libavfilter/vf_framestep.c b/libavfilter/vf_framestep.c
index 09945e17ae..6f198b8ff5 100644
--- a/libavfilter/vf_framestep.c
+++ b/libavfilter/vf_framestep.c
@@ -49,7 +49,6 @@ static int config_output_props(AVFilterLink *outlink)
     FrameStepContext *framestep = ctx->priv;
     AVFilterLink *inlink = ctx->inputs[0];
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->frame_rate =
         av_div_q(inlink->frame_rate, (AVRational){framestep->frame_step, 1});
 
diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c
index 21011cf4dd..e4fe6cbe7f 100644
--- a/libavfilter/vf_idet.c
+++ b/libavfilter/vf_idet.c
@@ -400,12 +400,6 @@ static int query_formats(AVFilterContext *ctx)
     return ff_set_common_formats(ctx, fmts_list);
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static av_cold int init(AVFilterContext *ctx)
 {
     IDETContext *idet = ctx->priv;
@@ -440,7 +434,6 @@ static const AVFilterPad idet_outputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
-        .config_props = config_output,
         .request_frame = request_frame
     },
     { NULL }
diff --git a/libavfilter/vf_interlace.c b/libavfilter/vf_interlace.c
index dcc94133a8..c92f67b74e 100644
--- a/libavfilter/vf_interlace.c
+++ b/libavfilter/vf_interlace.c
@@ -113,7 +113,6 @@ static int config_out_props(AVFilterLink *outlink)
     // half framerate
     outlink->time_base.num *= 2;
     outlink->frame_rate.den *= 2;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
 
 
     if (s->lowpass) {
diff --git a/libavfilter/vf_palettegen.c b/libavfilter/vf_palettegen.c
index 9e723377b7..025bb53589 100644
--- a/libavfilter/vf_palettegen.c
+++ b/libavfilter/vf_palettegen.c
@@ -520,7 +520,6 @@ static int config_output(AVFilterLink *outlink)
 {
     outlink->w = outlink->h = 16;
     outlink->sample_aspect_ratio = av_make_q(1, 1);
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     return 0;
 }
 
diff --git a/libavfilter/vf_pullup.c b/libavfilter/vf_pullup.c
index ea15019ab0..79cf9eeeb4 100644
--- a/libavfilter/vf_pullup.c
+++ b/libavfilter/vf_pullup.c
@@ -220,12 +220,6 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static PullupBuffer *pullup_lock_buffer(PullupBuffer *b, int parity)
 {
     if (!b)
@@ -766,7 +760,6 @@ static const AVFilterPad pullup_outputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
-        .config_props = config_output,
     },
     { NULL }
 };
diff --git a/libavfilter/vf_random.c b/libavfilter/vf_random.c
index 663fafc24d..373a7db053 100644
--- a/libavfilter/vf_random.c
+++ b/libavfilter/vf_random.c
@@ -64,12 +64,6 @@ static av_cold int init(AVFilterContext *ctx)
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
-{
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-    return 0;
-}
-
 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -128,7 +122,6 @@ static const AVFilterPad random_outputs[] = {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
-        .config_props  = config_output,
     },
     { NULL }
 };
diff --git a/libavfilter/vf_stereo3d.c b/libavfilter/vf_stereo3d.c
index b0deba3610..19cd59c9cb 100644
--- a/libavfilter/vf_stereo3d.c
+++ b/libavfilter/vf_stereo3d.c
@@ -373,7 +373,6 @@ static int config_output(AVFilterLink *outlink)
         break;
     case ALTERNATING_RL:
     case ALTERNATING_LR:
-        outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
         fps.den        *= 2;
         tb.num         *= 2;
         break;
diff --git a/libavfilter/vf_telecine.c b/libavfilter/vf_telecine.c
index 26f0ef8abc..bb091e1f3c 100644
--- a/libavfilter/vf_telecine.c
+++ b/libavfilter/vf_telecine.c
@@ -157,7 +157,6 @@ static int config_output(AVFilterLink *outlink)
     av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
            inlink->frame_rate.num, inlink->frame_rate.den, fps.num, fps.den);
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->frame_rate = fps;
     outlink->time_base = av_mul_q(inlink->time_base, s->pts);
     av_log(ctx, AV_LOG_VERBOSE, "TB: %d/%d -> %d/%d\n",
diff --git a/libavfilter/vf_tile.c b/libavfilter/vf_tile.c
index 47569771d0..9af00bd8f5 100644
--- a/libavfilter/vf_tile.c
+++ b/libavfilter/vf_tile.c
@@ -116,8 +116,6 @@ static int config_props(AVFilterLink *outlink)
     ff_draw_init(&tile->draw, inlink->format, 0);
     ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
 
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
-
     return 0;
 }
 
diff --git a/libavfilter/vf_tinterlace.c b/libavfilter/vf_tinterlace.c
index e2f8c34385..4bdcd45c05 100644
--- a/libavfilter/vf_tinterlace.c
+++ b/libavfilter/vf_tinterlace.c
@@ -117,7 +117,6 @@ static int config_out_props(AVFilterLink *outlink)
     int i;
 
     tinterlace->vsub = desc->log2_chroma_h;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
     outlink->w = inlink->w;
     outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD ?
         inlink->h*2 : inlink->h;
diff --git a/libavfilter/vf_w3fdif.c b/libavfilter/vf_w3fdif.c
index bbd8db00d3..849a3c08b4 100644
--- a/libavfilter/vf_w3fdif.c
+++ b/libavfilter/vf_w3fdif.c
@@ -117,7 +117,6 @@ static int config_output(AVFilterLink *outlink)
     outlink->time_base.den = inlink->time_base.den * 2;
     outlink->frame_rate.num = inlink->frame_rate.num * 2;
     outlink->frame_rate.den = inlink->frame_rate.den;
-    outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
 
     return 0;
 }