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vtdec: optimize renegotiation

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::negotiate can be called several times before the CAPS event is sent downstream
so use the currently configured output state caps instead of the pad current
caps when deciding whether to recreate the VTSession or not.

This leads to creating/destroying less VTSessions which makes renegotiation more
reliable especially when using hw decoding.
This commit is contained in:
Alessandro Decina 2016-06-02 11:36:57 +10:00
parent 9e442d5cc0
commit bf444301f9
1 changed files with 9 additions and 3 deletions
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12
sys/applemedia/vtdec.c
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@ -245,6 +245,12 @@ gst_vtdec_negotiate (GstVideoDecoder * decoder)
if (features)
features = gst_caps_features_copy (features);
output_state = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (vtdec));
if (output_state) {
prevcaps = gst_caps_ref (output_state->caps);
gst_video_codec_state_unref (output_state);
}
output_state = gst_video_decoder_set_output_state (GST_VIDEO_DECODER (vtdec),
format, vtdec->video_info.width, vtdec->video_info.height,
vtdec->input_state);
@ -265,10 +271,10 @@ gst_vtdec_negotiate (GstVideoDecoder * decoder)
}
gst_caps_unref (caps);
prevcaps = gst_pad_get_current_caps (decoder->srcpad);
if (!prevcaps || !gst_caps_is_equal (prevcaps, output_state->caps)) {
GST_INFO_OBJECT (vtdec, "negotiated output format %" GST_PTR_FORMAT,
output_state->caps);
GST_INFO_OBJECT (vtdec,
"negotiated output format %" GST_PTR_FORMAT " previous %"
GST_PTR_FORMAT, output_state->caps, prevcaps);
if (vtdec->session) {
gst_vtdec_push_frames_if_needed (vtdec, TRUE, FALSE);