avfilter/avfilter: Remove unused partial_buf

It is unused since 02aa0701ae.
The corresponding size field is write-only since then.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavfilter/af_firequalizer.c

@@ -837,7 +837,7 @@ static int config_input(AVFilterLink *inlink)
            inlink->sample_rate, inlink->channels, s->analysis_rdft_len, s->rdft_len, s->fir_len, s->nsamples_max);
 
     if (s->fixed)
-        inlink->min_samples = inlink->max_samples = inlink->partial_buf_size = s->nsamples_max;
+        inlink->min_samples = inlink->max_samples = s->nsamples_max;
 
     return generate_kernel(ctx, SELECT_GAIN(s), SELECT_GAIN_ENTRY(s));
 }

libavfilter/af_loudnorm.c

@@ -504,8 +504,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         s->pts +=
         out->nb_samples =
         inlink->min_samples =
-        inlink->max_samples =
-        inlink->partial_buf_size = subframe_length;
+        inlink->max_samples = subframe_length;
 
         s->frame_type = INNER_FRAME;
         break;
@@ -761,8 +760,7 @@ static int config_input(AVFilterLink *inlink)
 
     if (s->frame_type != LINEAR_MODE) {
         inlink->min_samples =
-        inlink->max_samples =
-        inlink->partial_buf_size = frame_size(inlink->sample_rate, 3000);
+        inlink->max_samples = frame_size(inlink->sample_rate, 3000);
     }
 
     s->pts = AV_NOPTS_VALUE;

libavfilter/af_lv2.c

@@ -380,7 +380,7 @@ static int config_output(AVFilterLink *outlink)
          lilv_plugin_has_feature(s->plugin, s->boundedBlockLength))) {
         AVFilterLink *inlink = ctx->inputs[0];
 
-        inlink->partial_buf_size = inlink->min_samples = inlink->max_samples = 4096;
+        inlink->min_samples = inlink->max_samples = 4096;
     }
 
     return 0;

libavfilter/af_replaygain.c

@@ -359,7 +359,6 @@ static int config_input(AVFilterLink *inlink)
 
     s->yule_hist_i   = 20;
     s->butter_hist_i = 4;
-    inlink->partial_buf_size =
     inlink->min_samples =
     inlink->max_samples = inlink->sample_rate / 20;
 

libavfilter/avf_aphasemeter.c

@@ -131,7 +131,6 @@ static int config_input(AVFilterLink *inlink)
 
     if (s->do_video) {
         nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
-        inlink->partial_buf_size =
         inlink->min_samples =
         inlink->max_samples = nb_samples;
     }

libavfilter/avfilter.c

@@ -177,7 +177,6 @@ void avfilter_link_free(AVFilterLink **link)
     if (!*link)
         return;
 
-    av_frame_free(&(*link)->partial_buf);
     ff_framequeue_free(&(*link)->fifo);
     ff_frame_pool_uninit((FFFramePool**)&(*link)->frame_pool);
 

libavfilter/avfilter.h

@@ -548,20 +548,9 @@ struct AVFilterLink {
      */
     AVRational frame_rate;
 
-    /**
-     * Buffer partially filled with samples to achieve a fixed/minimum size.
-     */
-    AVFrame *partial_buf;
-
-    /**
-     * Size of the partial buffer to allocate.
-     * Must be between min_samples and max_samples.
-     */
-    int partial_buf_size;
-
     /**
      * Minimum number of samples to filter at once. If filter_frame() is
-     * called with fewer samples, it will accumulate them in partial_buf.
+     * called with fewer samples, it will accumulate them in fifo.
      * This field and the related ones must not be changed after filtering
      * has started.
      * If 0, all related fields are ignored.

libavfilter/buffersink.c

@@ -199,8 +199,7 @@ void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
 {
     AVFilterLink *inlink = ctx->inputs[0];
 
-    inlink->min_samples = inlink->max_samples =
-    inlink->partial_buf_size = frame_size;
+    inlink->min_samples = inlink->max_samples = frame_size;
 }
 
 #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \

libavfilter/f_ebur128.c

@@ -413,8 +413,7 @@ static int config_audio_input(AVFilterLink *inlink)
      * filter_frame()). */
     if (ebur128->metadata || (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS))
         inlink->min_samples =
-        inlink->max_samples =
-        inlink->partial_buf_size = inlink->sample_rate / 10;
+        inlink->max_samples = inlink->sample_rate / 10;
     return 0;
 }