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openh264dec: Try to handle frame reordering

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As openh264 has no way to attach any IDs to input frames that we then get on
the output frames, we have to assume that the input has valid PTS. We just
take the frame with the oldest PTS, and if there is no PTS information we take
the one with the oldest DTS.
This commit is contained in:
Sebastian Dröge 2014-10-02 16:33:30 +03:00
parent 8ae2af61ce
commit 0e15f47bdf
1 changed files with 27 additions and 1 deletions
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28
ext/openh264/gstopenh264dec.cpp
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@ -228,6 +228,32 @@ static gboolean gst_openh264dec_reset(GstVideoDecoder *decoder, gboolean hard)
return TRUE;
}
static GstVideoCodecFrame *
get_oldest_pts_frame (GstVideoDecoder * decoder)
{
GList *frames, *l;
GstVideoCodecFrame *oldest = NULL;
frames = gst_video_decoder_get_frames (decoder);
for (l = frames; l; l = l->next) {
GstVideoCodecFrame *tmp = (GstVideoCodecFrame *) l->data;
if (tmp->pts != GST_CLOCK_TIME_NONE &&
(oldest == NULL || oldest->pts > tmp->pts))
oldest = tmp;
}
if (oldest)
gst_video_codec_frame_ref (oldest);
else
oldest = gst_video_decoder_get_oldest_frame (decoder);
g_list_foreach (frames, (GFunc) gst_video_codec_frame_unref, NULL);
g_list_free (frames);
return oldest;
}
static GstFlowReturn gst_openh264dec_handle_frame(GstVideoDecoder *decoder, GstVideoCodecFrame *frame)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC(decoder);
@ -277,7 +303,7 @@ static GstFlowReturn gst_openh264dec_handle_frame(GstVideoDecoder *decoder, GstV
return GST_FLOW_EOS;
}
frame = gst_video_decoder_get_oldest_frame (decoder);
frame = get_oldest_pts_frame (decoder);
if (!frame) {
/* Can only happen in finish() */
return GST_FLOW_EOS;