1. 18 Nov, 2016 2 commits
  2. 17 Nov, 2016 22 commits
  3. 16 Nov, 2016 13 commits
  4. 15 Nov, 2016 3 commits
    • Michael Niedermayer's avatar
      avcodec/rv40: Test remaining space in loop of get_dimension() · 1546d487
      Michael Niedermayer authored
      Fixes infinite loop
      Fixes: 178/fuzz-3-ffmpeg_VIDEO_AV_CODEC_ID_RV40_fuzzer
      
      Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
      1546d487
    • Andreas Cadhalpun's avatar
      mlz: limit next_code to data buffer size · 1abcd972
      Andreas Cadhalpun authored
      This fixes a heap-buffer-overflow detected by AddressSanitizer.
      Reviewed-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
      Signed-off-by: 's avatarAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
      1abcd972
    • Martin Storsjö's avatar
      aarch64: vp9: Implement NEON loop filters · f1212e47
      Martin Storsjö authored
      This work is sponsored by, and copyright, Google.
      
      These are ported from the ARM version; thanks to the larger
      amount of registers available, we can do the loop filters with
      16 pixels at a time. The implementation is fully templated, with
      a single macro which can generate versions for both 8 and
      16 pixels wide, for both 4, 8 and 16 pixels loop filters
      (and the 4/8 mixed versions as well).
      
      For the 8 pixel wide versions, it is pretty close in speed (the
      v_4_8 and v_8_8 filters are the best examples of this; the h_4_8
      and h_8_8 filters seem to get some gain in the load/transpose/store
      part). For the 16 pixels wide ones, we get a speedup of around
      1.2-1.4x compared to the 32 bit version.
      
      Examples of runtimes vs the 32 bit version, on a Cortex A53:
                                             ARM AArch64
      vp9_loop_filter_h_4_8_neon:          144.0   127.2
      vp9_loop_filter_h_8_8_neon:          207.0   182.5
      vp9_loop_filter_h_16_8_neon:         415.0   328.7
      vp9_loop_filter_h_16_16_neon:        672.0   558.6
      vp9_loop_filter_mix2_h_44_16_neon:   302.0   203.5
      vp9_loop_filter_mix2_h_48_16_neon:   365.0   305.2
      vp9_loop_filter_mix2_h_84_16_neon:   365.0   305.2
      vp9_loop_filter_mix2_h_88_16_neon:   376.0   305.2
      vp9_loop_filter_mix2_v_44_16_neon:   193.2   128.2
      vp9_loop_filter_mix2_v_48_16_neon:   246.7   218.4
      vp9_loop_filter_mix2_v_84_16_neon:   248.0   218.5
      vp9_loop_filter_mix2_v_88_16_neon:   302.0   218.2
      vp9_loop_filter_v_4_8_neon:           89.0    88.7
      vp9_loop_filter_v_8_8_neon:          141.0   137.7
      vp9_loop_filter_v_16_8_neon:         295.0   272.7
      vp9_loop_filter_v_16_16_neon:        546.0   453.7
      
      The speedup vs C code in checkasm tests is around 2-7x, which is
      pretty much the same as for the 32 bit version. Even if these functions
      are faster than their 32 bit equivalent, the C version that we compare
      to also became around 1.3-1.7x faster than the C version in 32 bit.
      
      Based on START_TIMER/STOP_TIMER wrapping around a few individual
      functions, the speedup vs C code is around 4-5x.
      
      Examples of runtimes vs C on a Cortex A57 (for a slightly older version
      of the patch):
                               A57 gcc-5.3  neon
      loop_filter_h_4_8_neon:        256.6  93.4
      loop_filter_h_8_8_neon:        307.3 139.1
      loop_filter_h_16_8_neon:       340.1 254.1
      loop_filter_h_16_16_neon:      827.0 407.9
      loop_filter_mix2_h_44_16_neon: 524.5 155.4
      loop_filter_mix2_h_48_16_neon: 644.5 173.3
      loop_filter_mix2_h_84_16_neon: 630.5 222.0
      loop_filter_mix2_h_88_16_neon: 697.3 222.0
      loop_filter_mix2_v_44_16_neon: 598.5 100.6
      loop_filter_mix2_v_48_16_neon: 651.5 127.0
      loop_filter_mix2_v_84_16_neon: 591.5 167.1
      loop_filter_mix2_v_88_16_neon: 855.1 166.7
      loop_filter_v_4_8_neon:        271.7  65.3
      loop_filter_v_8_8_neon:        312.5 106.9
      loop_filter_v_16_8_neon:       473.3 206.5
      loop_filter_v_16_16_neon:      976.1 327.8
      
      The speed-up compared to the C functions is 2.5 to 6 and the cortex-a57
      is again 30-50% faster than the cortex-a53.
      
      This is an adapted cherry-pick from libav commits
      9d2afd1e and
      31756abe.
      Signed-off-by: 's avatarRonald S. Bultje <rsbultje@gmail.com>
      f1212e47