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decoder: h264: factor out DPB pruning for MVC.

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Factor out the removal process of unused inter-view only reference
pictures from the DPB, prior to the possible insertion of the current
picture.

Ideally, the compiler could still opt for generating two loops. But
at least, the code is now clearer for maintenance.
This commit is contained in:
Gwenole Beauchesne 2014-06-10 18:30:21 +02:00
parent 63fde28dfd
commit c65aec1aa6
1 changed files with 12 additions and 22 deletions
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34
gst-libs/gst/vaapi/gstvaapidecoder_h264.c
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@ -873,31 +873,21 @@ static void
dpb_prune_mvc(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
{
GstVaapiDecoderH264Private * const priv = &decoder->priv;
const gboolean is_last_picture = /* in the access unit */
GST_VAAPI_PICTURE_FLAG_IS_SET(picture, GST_VAAPI_PICTURE_FLAG_AU_END);
guint i;
// Remove all unused inter-view only reference components of the current AU
if (GST_VAAPI_PICTURE_FLAG_IS_SET(picture, GST_VAAPI_PICTURE_FLAG_AU_END)) {
i = 0;
while (i < priv->dpb_count) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (fs->view_id != picture->base.view_id &&
!fs->output_needed && !gst_vaapi_frame_store_has_reference(fs))
dpb_remove_index(decoder, i);
else
i++;
}
}
else {
i = 0;
while (i < priv->dpb_count) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (fs->view_id != picture->base.view_id &&
!fs->output_needed && !gst_vaapi_frame_store_has_reference(fs) &&
!is_inter_view_reference_for_next_frames(decoder, fs))
dpb_remove_index(decoder, i);
else
i++;
}
i = 0;
while (i < priv->dpb_count) {
GstVaapiFrameStore * const fs = priv->dpb[i];
if (fs->view_id != picture->base.view_id &&
!fs->output_needed && !gst_vaapi_frame_store_has_reference(fs) &&
(is_last_picture ||
!is_inter_view_reference_for_next_frames(decoder, fs)))
dpb_remove_index(decoder, i);
else
i++;
}
}