avfilter/f_cue: use inlink fifo for queueing frames

Signed-off-by: Marton Balint <cus@passwd.hu>

libavfilter/f_cue.c

@@ -22,7 +22,6 @@
 #include "libavutil/time.h"
 #include "avfilter.h"
 #include "filters.h"
-#include "framequeue.h"
 #include "internal.h"
 
 typedef struct CueContext {
@@ -32,73 +31,49 @@ typedef struct CueContext {
     int64_t preroll;
     int64_t buffer;
     int status;
-    FFFrameQueue queue;
 } CueContext;
 
-static av_cold int init(AVFilterContext *ctx)
-{
-    CueContext *s = ctx->priv;
-    ff_framequeue_init(&s->queue, &ctx->graph->internal->frame_queues);
-    return 0;
-}
-
-static av_cold void uninit(AVFilterContext *ctx)
-{
-    CueContext *s = ctx->priv;
-    ff_framequeue_free(&s->queue);
-}
-
 static int activate(AVFilterContext *ctx)
 {
     AVFilterLink *inlink = ctx->inputs[0];
     AVFilterLink *outlink = ctx->outputs[0];
     CueContext *s = ctx->priv;
-    int64_t pts;
-    AVFrame *frame = NULL;
 
     FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
 
-    if (s->status < 3 || s->status == 5) {
-        int ret = ff_inlink_consume_frame(inlink, &frame);
-        if (ret < 0)
-            return ret;
-        if (frame)
-            pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
-    }
+    if (ff_inlink_queued_frames(inlink)) {
+        AVFrame *frame = ff_inlink_peek_frame(inlink, 0);
+        int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
 
-    if (!s->status && frame) {
-        s->first_pts = pts;
-        s->status++;
-    }
-    if (s->status == 1 && frame) {
-        if (pts - s->first_pts < s->preroll)
-            return ff_filter_frame(outlink, frame);
-        s->first_pts = pts;
-        s->status++;
-    }
-    if (s->status == 2 && frame) {
-        int ret = ff_framequeue_add(&s->queue, frame);
-        if (ret < 0) {
-            av_frame_free(&frame);
-            return ret;
+        if (!s->status) {
+            s->first_pts = pts;
+            s->status++;
         }
-        frame = NULL;
-        if (!(pts - s->first_pts < s->buffer && (av_gettime() - s->cue) < 0))
+        if (s->status == 1) {
+            if (pts - s->first_pts < s->preroll) {
+                ff_inlink_consume_frame(inlink, &frame);
+                return ff_filter_frame(outlink, frame);
+            }
+            s->first_pts = pts;
             s->status++;
+        }
+        if (s->status == 2) {
+            frame = ff_inlink_peek_frame(inlink, ff_inlink_queued_frames(inlink) - 1);
+            pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
+            if (!(pts - s->first_pts < s->buffer && (av_gettime() - s->cue) < 0))
+                s->status++;
+        }
+        if (s->status == 3) {
+            int64_t diff;
+            while ((diff = (av_gettime() - s->cue)) < 0)
+                av_usleep(av_clip(-diff / 2, 100, 1000000));
+            s->status++;
+        }
+        if (s->status == 4) {
+            ff_inlink_consume_frame(inlink, &frame);
+            return ff_filter_frame(outlink, frame);
+        }
     }
-    if (s->status == 3) {
-        int64_t diff;
-        while ((diff = (av_gettime() - s->cue)) < 0)
-            av_usleep(av_clip(-diff / 2, 100, 1000000));
-        s->status++;
-    }
-    if (s->status == 4) {
-        if (ff_framequeue_queued_frames(&s->queue))
-            return ff_filter_frame(outlink, ff_framequeue_take(&s->queue));
-        s->status++;
-    }
-    if (s->status == 5 && frame)
-        return ff_filter_frame(outlink, frame);
 
     FF_FILTER_FORWARD_STATUS(inlink, outlink);
     FF_FILTER_FORWARD_WANTED(outlink, inlink);
@@ -140,8 +115,6 @@ AVFilter ff_vf_cue = {
     .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
     .priv_size   = sizeof(CueContext),
     .priv_class  = &cue_class,
-    .init        = init,
-    .uninit      = uninit,
     .inputs      = cue_inputs,
     .outputs     = cue_outputs,
     .activate    = activate,
@@ -173,8 +146,6 @@ AVFilter ff_af_acue = {
     .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
     .priv_size   = sizeof(CueContext),
     .priv_class  = &acue_class,
-    .init        = init,
-    .uninit      = uninit,
     .inputs      = acue_inputs,
     .outputs     = acue_outputs,
     .activate    = activate,