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vtenc: report latency

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This commit is contained in:
Alessandro Decina 2014-12-10 19:44:01 +11:00
parent b03acbf584
commit 8166487a00
2 changed files with 36 additions and 1 deletions
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36
sys/applemedia/vtenc.c
View file

@ -249,7 +249,7 @@ gst_vtenc_init (GstVTEnc * self)
/* These could be controlled by properties later */
self->dump_properties = FALSE;
self->dump_attributes = FALSE;
self->latency_frames = -1;
self->session = NULL;
}
@ -342,6 +342,7 @@ gst_vtenc_set_quality (GstVTEnc * self, gdouble quality)
{
GST_OBJECT_LOCK (self);
self->quality = quality;
GST_INFO_OBJECT (self, "setting quality %f", quality);
if (self->session != NULL) {
gst_vtenc_session_configure_property_double (self, self->session,
kVTCompressionPropertyKey_Quality, quality);
@ -897,6 +898,37 @@ gst_vtenc_session_configure_property_double (GstVTEnc * self,
return status;
}
static void
gst_vtenc_update_latency (GstVTEnc * self)
{
OSStatus status;
CFNumberRef value;
int frames = 0;
GstClockTime frame_duration;
GstClockTime latency;
if (self->video_info.fps_d == 0) {
GST_INFO_OBJECT (self, "framerate not known, can't set latency");
return;
}
status = VTSessionCopyProperty (self->session,
kVTCompressionPropertyKey_NumberOfPendingFrames, NULL, &value);
CFNumberGetValue (value, kCFNumberSInt32Type, &frames);
if (self->latency_frames == -1 || self->latency_frames != frames) {
self->latency_frames = frames;
frame_duration = gst_util_uint64_scale (GST_SECOND,
self->video_info.fps_d, self->video_info.fps_n);
latency = frame_duration * frames;
GST_INFO_OBJECT (self,
"latency status %d frames %d fps %d/%d time %" GST_TIME_FORMAT, status,
frames, self->video_info.fps_n, self->video_info.fps_d,
GST_TIME_ARGS (latency));
gst_video_encoder_set_latency (GST_VIDEO_ENCODER (self), latency, latency);
}
CFRelease (value);
}
static GstFlowReturn
gst_vtenc_encode_frame (GstVTEnc * self, GstVideoCodecFrame * frame)
{
@ -1082,6 +1114,8 @@ gst_vtenc_encode_frame (GstVTEnc * self, GstVideoCodecFrame * frame)
gst_video_codec_frame_unref (outframe);
break;
}
gst_vtenc_update_latency (self);
}
ret =

1
sys/applemedia/vtenc.h
View file

@ -63,6 +63,7 @@ struct _GstVTEnc
gdouble quality;
gint max_keyframe_interval;
GstClockTime max_keyframe_interval_duration;
gint latency_frames;
gboolean dump_properties;
gboolean dump_attributes;