Improve and fix LATENCY query handling

This now follows the design docs everywhere, especially the maximum latency
handling.

https://bugzilla.gnome.org/show_bug.cgi?id=744106

2 files changed, 16 insertions, 15 deletions

diff --git a/ext/x264/gstx264enc.c b/ext/x264/gstx264enc.c
index 0a2280bb..11616532 100644
--- a/ext/x264/gstx264enc.c
+++ b/ext/x264/gstx264enc.c
@@ -1728,25 +1728,27 @@ static void
 gst_x264_enc_set_latency (GstX264Enc * encoder)
 {
   GstVideoInfo *info = &encoder->input_state->info;
+  gint max_delayed_frames;
+  GstClockTime latency;
+
+  max_delayed_frames = x264_encoder_maximum_delayed_frames (encoder->x264enc);
 
   if (info->fps_n) {
-    GstClockTime latency;
-    gint max_delayed_frames;
-    max_delayed_frames = x264_encoder_maximum_delayed_frames (encoder->x264enc);
     latency = gst_util_uint64_scale_ceil (GST_SECOND * info->fps_d,
         max_delayed_frames, info->fps_n);
-
-    GST_INFO_OBJECT (encoder,
-        "Updating latency to %" GST_TIME_FORMAT " (%d frames)",
-        GST_TIME_ARGS (latency), max_delayed_frames);
-
-    gst_video_encoder_set_latency (GST_VIDEO_ENCODER (encoder), latency,
-        GST_CLOCK_TIME_NONE);
   } else {
-    /* We can't do live as we don't know our latency */
-    gst_video_encoder_set_latency (GST_VIDEO_ENCODER (encoder),
-        0, GST_CLOCK_TIME_NONE);
+    /* FIXME: Assume 25fps. This is better than reporting no latency at
+     * all and then later failing in live pipelines
+     */
+    latency = gst_util_uint64_scale_ceil (GST_SECOND * 1,
+        max_delayed_frames, 25);
   }
+
+  GST_INFO_OBJECT (encoder,
+      "Updating latency to %" GST_TIME_FORMAT " (%d frames)",
+      GST_TIME_ARGS (latency), max_delayed_frames);
+
+  gst_video_encoder_set_latency (GST_VIDEO_ENCODER (encoder), latency, latency);
 }
 
 static gboolean
diff --git a/gst/asfdemux/gstasfdemux.c b/gst/asfdemux/gstasfdemux.c
index 417e569c..ea2f14d8 100644
--- a/gst/asfdemux/gstasfdemux.c
+++ b/gst/asfdemux/gstasfdemux.c
@@ -4335,8 +4335,7 @@ gst_asf_demux_handle_src_query (GstPad * pad, GstObject * parent,
           GST_TIME_ARGS (min), GST_TIME_ARGS (max));
 
       GST_OBJECT_LOCK (demux);
-      if (min != -1)
-        min += demux->latency;
+      min += demux->latency;
       if (max != -1)
         max += demux->latency;
       GST_OBJECT_UNLOCK (demux);