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• avcodec/mjpegenc_huffman : Avoid AV_QSORT to sort entries by length

  2 avril, par Andreas Rheinhardt

  avcodec/mjpegenc_huffman: Avoid AV_QSORT to sort entries by length
  
  It is unnecessary, as we already have the entries sorted by
  probability and therefore implicitly by length. All we need
  on top of that to build the tree is the number of entries
  of a given length.
  Doing so gives a 3.6% speedup of ff_mjpeg_encode_huffman_close()
  here; it also saves about 640B of .text here.
  
  The new code puts values with higher probability to the left
  of the tree. The old code did not and therefore
  the FATE checksums needed to be updated. Due to MJPEG's
  0xFF unescaping file sizes as well as file checksums
  needed to be updated; the decoded picture hashes stayed
  the same. Given that codes on the left of the tree have
  on average fewer bits set than codes on the right, the
  file sizes mostly improve (all except vsynth3-mjpeg-444).
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mjpegenc_huffman.c
  • [DH] libavcodec/tests/mjpegenc_huffman.c
  • [DH] tests/ref/fate/jpg-icc
  • [DH] tests/ref/lavf/jpg
  • [DH] tests/ref/lavf/smjpeg
  • [DH] tests/ref/seek/lavf-jpg
  • [DH] tests/ref/vsynth/vsynth1-mjpeg-422
  • [DH] tests/ref/vsynth/vsynth1-mjpeg-444
  • [DH] tests/ref/vsynth/vsynth1-mjpeg-huffman
  • [DH] tests/ref/vsynth/vsynth1-mjpeg-trell-huffman
  • [DH] tests/ref/vsynth/vsynth2-mjpeg-422
  • [DH] tests/ref/vsynth/vsynth2-mjpeg-444
  • [DH] tests/ref/vsynth/vsynth2-mjpeg-huffman
  • [DH] tests/ref/vsynth/vsynth2-mjpeg-trell-huffman
  • [DH] tests/ref/vsynth/vsynth3-mjpeg-422
  • [DH] tests/ref/vsynth/vsynth3-mjpeg-444
  • [DH] tests/ref/vsynth/vsynth3-mjpeg-huffman
  • [DH] tests/ref/vsynth/vsynth3-mjpeg-trell-huffman
  • [DH] tests/ref/vsynth/vsynth_lena-mjpeg-422
  • [DH] tests/ref/vsynth/vsynth_lena-mjpeg-444
  • [DH] tests/ref/vsynth/vsynth_lena-mjpeg-huffman
  • [DH] tests/ref/vsynth/vsynth_lena-mjpeg-trell-huffman

• avocdec/mjpegenc_huffman : Avoid redundant loop

  2 avril, par Andreas Rheinhardt

  avocdec/mjpegenc_huffman: Avoid redundant loop
  
  There is no point in iterating over the list twice.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mjpegenc_huffman.c

• avcodec/mjpegenc_huffman : Make ff_mjpegenc_huffman_compute_bits() static

  2 avril, par Andreas Rheinhardt

  avcodec/mjpegenc_huffman: Make ff_mjpegenc_huffman_compute_bits() static
  
  Only used here and in a test tool.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mjpegenc_huffman.c
  • [DH] libavcodec/mjpegenc_huffman.h
  • [DH] libavcodec/tests/mjpegenc_huffman.c

• avcodec/aacenc_is : Make ff_aac_is_encoding_err() static

  2 avril, par Andreas Rheinhardt

  avcodec/aacenc_is: Make ff_aac_is_encoding_err() static
  
  Possible since 9b11fefb88c770b9c1d4d4583c61c6abde6c033c.
  Also remove a now always-zero parameter.
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/aacenc_is.c
  • [DH] libavcodec/aacenc_is.h

• avcodec/ffv1 : Allocate unit only when needed and only as large as needed

  2 avril, par Michael Niedermayer

  avcodec/ffv1: Allocate unit only when needed and only as large as needed
  
  That is instead of a fixed 65536, we now allocate only as many as there
  are pixels.
  We also allocate only for the encoder and only when remapping is enabled
  and only for 32bit per sample
  
  This should reduce memory consumption, the 2nd array will be
  dealt with in a future commit
  
  Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/ffv1.h
  • [DH] libavcodec/ffv1enc.c