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videodecoder: Add debug output tracking decode-after-flush

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Track how long it takes to generate the first buffer after a flush
as a simple measure of how efficient the decoder is at skipping /
rushing to get to the first decode.
This commit is contained in:
Jan Schmidt 2017-03-16 13:56:10 +11:00
parent 97001a886a
commit 2d3e69dca3
1 changed files with 21 additions and 0 deletions
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21
gst-libs/gst/video/gstvideodecoder.c
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@ -401,6 +401,12 @@ struct _GstVideoDecoderPrivate
/* flags */
gboolean use_default_pad_acceptcaps;
#ifndef GST_DISABLE_DEBUG
/* Diagnostic time for reporting the time
* from flush to first output */
GstClockTime last_reset_time;
#endif
};
static GstElementClass *parent_class = NULL;
@ -2080,6 +2086,10 @@ gst_video_decoder_reset (GstVideoDecoder * decoder, gboolean full,
priv->time = 0;
GST_OBJECT_UNLOCK (decoder);
#ifndef GST_DISABLE_DEBUG
priv->last_reset_time = gst_util_get_timestamp ();
#endif
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
@ -3176,6 +3186,17 @@ gst_video_decoder_clip_and_push_buf (GstVideoDecoder * decoder, GstBuffer * buf)
if (G_UNLIKELY (priv->error_count))
priv->error_count = 0;
#ifndef GST_DISABLE_DEBUG
if (G_UNLIKELY (priv->last_reset_time != GST_CLOCK_TIME_NONE)) {
GstClockTime elapsed = gst_util_get_timestamp () - priv->last_reset_time;
/* First buffer since reset, report how long we took */
GST_INFO_OBJECT (decoder, "First buffer since flush took %" GST_TIME_FORMAT
" to produce", GST_TIME_ARGS (elapsed));
priv->last_reset_time = GST_CLOCK_TIME_NONE;
}
#endif
ret = gst_pad_push (decoder->srcpad, buf);
done: