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dec: scale the estimated duration by number of frames

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When estimating the frame duration, the diff between two incomming timestamps
should be scaled by the amount of frames in the interval. Improves duration
estimation and DTS interpolation.
This commit is contained in:
Wim Taymans 2010-12-12 12:38:55 +01:00 committed by Wim Taymans
parent 957c728b3d
commit ec48b24291
1 changed files with 14 additions and 1 deletions
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15
ext/ffmpeg/gstffmpegdec.c
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@ -97,6 +97,7 @@ struct _GstFFMpegDec
gboolean reordered_in;
GstClockTime last_in;
GstClockTime last_diff;
guint last_frames;
gboolean reordered_out;
GstClockTime last_out;
GstClockTime next_out;
@ -499,6 +500,7 @@ gst_ffmpegdec_reset_ts (GstFFMpegDec * ffmpegdec)
{
ffmpegdec->last_in = GST_CLOCK_TIME_NONE;
ffmpegdec->last_diff = GST_CLOCK_TIME_NONE;
ffmpegdec->last_frames = 0;
ffmpegdec->last_out = GST_CLOCK_TIME_NONE;
ffmpegdec->next_out = GST_CLOCK_TIME_NONE;
ffmpegdec->reordered_in = FALSE;
@ -2491,12 +2493,22 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
ffmpegdec->reordered_in = TRUE;
ffmpegdec->last_diff = GST_CLOCK_TIME_NONE;
} else if (in_timestamp > ffmpegdec->last_in) {
GstClockTime diff;
/* keep track of timestamp diff to estimate duration */
ffmpegdec->last_diff = in_timestamp - ffmpegdec->last_in;
diff = in_timestamp - ffmpegdec->last_in;
/* need to scale with amount of frames in the interval */
if (ffmpegdec->last_frames)
diff /= ffmpegdec->last_frames;
GST_LOG_OBJECT (ffmpegdec, "estimated duration %" GST_TIME_FORMAT " %u",
GST_TIME_ARGS (diff), ffmpegdec->last_frames);
ffmpegdec->last_diff = diff;
}
}
ffmpegdec->last_in = in_timestamp;
}
ffmpegdec->last_frames = 0;
GST_LOG_OBJECT (ffmpegdec,
"Received new data of size %u, offset:%" G_GUINT64_FORMAT ", ts:%"
@ -2634,6 +2646,7 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
} else {
ffmpegdec->clear_ts = TRUE;
}
ffmpegdec->last_frames++;
GST_LOG_OBJECT (ffmpegdec, "Before (while bsize>0). bsize:%d , bdata:%p",
bsize, bdata);