[libav-commits] hevc: Refactor decode_nal_sei_frame_packing_arrangement

Luca Barbato git at libav.org
Tue Dec 17 17:43:03 CET 2013


Module: libav
Branch: master
Commit: 3a149e23d37f06d49ab0bb013a3b9cb0224bba5c

Author:    Luca Barbato <lu_zero at gentoo.org>
Committer: Vittorio Giovara <vittorio.giovara at gmail.com>
Date:      Fri Dec 13 15:39:45 2013 +0000

hevc: Refactor decode_nal_sei_frame_packing_arrangement

Directly set the fields when necessary.

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

---

 libavcodec/hevc_sei.c |   19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index eed7b33..b011596 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -49,31 +49,26 @@ static void decode_nal_sei_decoded_picture_hash(HEVCContext *s)
 static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
 {
     GetBitContext *gb = &s->HEVClc.gb;
-    int cancel, type, quincunx, content;
 
     get_ue_golomb(gb);                  // frame_packing_arrangement_id
-    cancel = get_bits1(gb);             // frame_packing_cancel_flag
-    if (cancel == 0) {
-        type     = get_bits(gb, 7);     // frame_packing_arrangement_type
-        quincunx = get_bits1(gb);       // quincunx_sampling_flag
-        content  = get_bits(gb, 6);     // content_interpretation_type
+    s->sei_frame_packing_present = !get_bits1(gb);
+
+    if (s->sei_frame_packing_present) {
+        s->frame_packing_arrangement_type = get_bits(gb, 7);
+        s->quincunx_subsampling           = get_bits1(gb);
+        s->content_interpretation_type    = get_bits(gb, 6);
 
         // the following skips spatial_flipping_flag frame0_flipped_flag
         // field_views_flag current_frame_is_frame0_flag
         // frame0_self_contained_flag frame1_self_contained_flag
         skip_bits(gb, 6);
 
-        if (quincunx == 0 && type != 5)
+        if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
             skip_bits(gb, 16);  // frame[01]_grid_position_[xy]
         skip_bits(gb, 8);       // frame_packing_arrangement_reserved_byte
         skip_bits1(gb);         // frame_packing_arrangement_persistance_flag
     }
     skip_bits1(gb);             // upsampled_aspect_ratio_flag
-
-    s->sei_frame_packing_present      = (cancel == 0);
-    s->frame_packing_arrangement_type = type;
-    s->content_interpretation_type    = content;
-    s->quincunx_subsampling           = quincunx;
 }
 
 static int decode_nal_sei_message(HEVCContext *s)



More information about the libav-commits mailing list