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• mpeg12dec : avoid signed overflow in bitrate calculation

  17 décembre 2016, par Anton Khirnov

  mpeg12dec: avoid signed overflow in bitrate calculation
  
  CC: libav-stable@libav.org
  Bug-Id: 981
  Found-By: Agostino Sarubbo
  

  • [DBH] libavcodec/mpeg12dec.c

• mpegvideo_parser : avoid signed overflow in bitrate calculation

  17 décembre 2016, par Anton Khirnov

  mpegvideo_parser: avoid signed overflow in bitrate calculation
  
  CC: libav-stable@libav.org
  Bug-Id: 981
  Found-By: Agostino Sarubbo
  

  • [DBH] libavcodec/mpegvideo_parser.c

• mov : fix a possible invalid read in mov_read_mac_string()

  17 décembre 2016, par Anton Khirnov

  mov: fix a possible invalid read in mov_read_mac_string()
  
  When the input string is too large, so the second condition in if ()
  fails, the code will erroneously execute the else branch, indexing the
  mac_to_unicode table with a negative index.
  
  CC: libav-stable@libav.org
  Bug-Id: 1000
  Found-By: Kamil Frankowicz
  

  • [DBH] libavformat/mov.c

• aarch64 : vp9mc : Calculate less unused data in the 4 pixel wide horizontal filter

  17 décembre 2016, par Martin Storsjö

  aarch64: vp9mc: Calculate less unused data in the 4 pixel wide horizontal filter
  
  No measured speedup on a Cortex A53, but other cores might benefit.
  
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DBH] libavcodec/aarch64/vp9mc_neon.S

• arm : vp9mc : Calculate less unused data in the 4 pixel wide horizontal filter

  17 décembre 2016, par Martin Storsjö

  arm: vp9mc: Calculate less unused data in the 4 pixel wide horizontal filter
  
  Before:                    Cortex A7      A8     A9     A53
  vp9_put_8tap_smooth_4h_neon:   378.1   273.2  340.7   229.5
  After:
  vp9_put_8tap_smooth_4h_neon:   352.1   222.2  290.5   229.5
  
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DBH] libavcodec/arm/vp9mc_neon.S