[FFmpeg-cvslog] avcodec/cbs_h2645: create a reference to the existing buffer when decomposing slice units

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Fri Apr 27 20:44:39 2018 -0300| [0807a771600956e1f3e36a202fd3877418541eb0] | committer: James Almer

avcodec/cbs_h2645: create a reference to the existing buffer when decomposing slice units

Reviewed-by: Mark Thompson <sw at jkqxz.net>
Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0807a771600956e1f3e36a202fd3877418541eb0
---

 libavcodec/cbs_h2645.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
index 5585831cf6..5e5598f377 100644
--- a/libavcodec/cbs_h2645.c
+++ b/libavcodec/cbs_h2645.c
@@ -776,15 +776,10 @@ static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
             }
 
             slice->data_size = len - pos / 8;
-            slice->data_ref  = av_buffer_alloc(slice->data_size +
-                                               AV_INPUT_BUFFER_PADDING_SIZE);
+            slice->data_ref  = av_buffer_ref(unit->data_ref);
             if (!slice->data_ref)
                 return AVERROR(ENOMEM);
-            slice->data = slice->data_ref->data;
-            memcpy(slice->data,
-                   unit->data + pos / 8, slice->data_size);
-            memset(slice->data + slice->data_size, 0,
-                   AV_INPUT_BUFFER_PADDING_SIZE);
+            slice->data = unit->data + pos / 8;
             slice->data_bit_start = pos % 8;
         }
         break;
@@ -946,15 +941,10 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
             }
 
             slice->data_size = len - pos / 8;
-            slice->data_ref  = av_buffer_alloc(slice->data_size +
-                                               AV_INPUT_BUFFER_PADDING_SIZE);
+            slice->data_ref  = av_buffer_ref(unit->data_ref);
             if (!slice->data_ref)
                 return AVERROR(ENOMEM);
-            slice->data = slice->data_ref->data;
-            memcpy(slice->data,
-                   unit->data + pos / 8, slice->data_size);
-            memset(slice->data + slice->data_size, 0,
-                   AV_INPUT_BUFFER_PADDING_SIZE);
+            slice->data = unit->data + pos / 8;
             slice->data_bit_start = pos % 8;
         }
         break;