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• tests/swscale : calculate theoretical expected SSIM

  4 mars, par Niklas Haas

  tests/swscale: calculate theoretical expected SSIM
  
  We can calculate with some confidence the theoretical expected SSIM
  from an "ideal" conversion, by computing the reference SSIM level
  for an image dithered with uniformly distributed quatization noise.
  
  This gives us an additional safety net to check for regressions even in
  the absence of a reference to compare against.
  

  • [DH] libswscale/tests/swscale.c

• swscale : aarch64 : Simplify the assignment of lumToYV12

  4 mars, par Martin Storsjö

  swscale: aarch64: Simplify the assignment of lumToYV12
  
  We normally don't need else statements here; the common pattern
  is to assign lower level SIMD implementations first, then
  conditionally reassign higher level ones afterwards, if supported.
  
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DH] libswscale/aarch64/swscale.c

• avcodec/aarch64/vvc : Optimize NEON version of vvc_dmvr

  3 mars, par Krzysztof Pyrkosz

  avcodec/aarch64/vvc: Optimize NEON version of vvc_dmvr
  
  This patch replaces blocks of instructions performing rounding and
  widening shifts with one-liners achieving the same result.
  
  Before and after on A78
  dmvr_8_12x20_neon:                                      86.2 ( 6.90x)
  dmvr_8_20x12_neon:                                      94.8 ( 5.93x)
  dmvr_8_20x20_neon:                                     141.5 ( 6.50x)
  dmvr_12_12x20_neon:                                    158.0 ( 3.76x)
  dmvr_12_20x12_neon:                                    151.2 ( 3.73x)
  dmvr_12_20x20_neon:                                    247.2 ( 3.71x)
  dmvr_hv_8_12x20_neon:                                  423.2 ( 3.75x)
  dmvr_hv_8_20x12_neon:                                  434.0 ( 3.69x)
  dmvr_hv_8_20x20_neon:                                  706.0 ( 3.69x)
  
  dmvr_8_12x20_neon:                                      77.2 ( 7.70x)
  dmvr_8_20x12_neon:                                      66.5 ( 8.49x)
  dmvr_8_20x20_neon:                                      92.2 ( 9.90x)
  dmvr_12_12x20_neon:                                     80.2 ( 7.38x)
  dmvr_12_20x12_neon:                                     58.2 ( 9.59x)
  dmvr_12_20x20_neon:                                     90.0 (10.15x)
  dmvr_hv_8_12x20_neon:                                  369.0 ( 4.34x)
  dmvr_hv_8_20x12_neon:                                  355.8 ( 4.49x)
  dmvr_hv_8_20x20_neon:                                  574.2 ( 4.51x)
  
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/aarch64/vvc/inter.S

• swscale/aarch64 : dotprod implementation of rgba32_to_Y

  3 mars, par Krzysztof Pyrkosz

  swscale/aarch64: dotprod implementation of rgba32_to_Y
  
  The idea is to split the 16 bit coefficients into lower and upper half,
  invoke udot for the lower half, shift by 8, and follow by udot for the
  upper half.
  
  Benchmark on A78:
  bgra_to_y_128_c:                                       682.0 ( 1.00x)
  bgra_to_y_128_neon:                                    181.2 ( 3.76x)
  bgra_to_y_128_dotprod:                                 117.8 ( 5.79x)
  bgra_to_y_1080_c:                                     5742.5 ( 1.00x)
  bgra_to_y_1080_neon:                                  1472.5 ( 3.90x)
  bgra_to_y_1080_dotprod:                                906.5 ( 6.33x)
  bgra_to_y_1920_c:                                    10194.0 ( 1.00x)
  bgra_to_y_1920_neon:                                  2589.8 ( 3.94x)
  bgra_to_y_1920_dotprod:                               1573.8 ( 6.48x)
  
  Signed-off-by: Martin Storsjö <martin@martin.st>
  

  • [DH] libswscale/aarch64/input.S
  • [DH] libswscale/aarch64/swscale.c

• avcodec/mpeg12enc : Simplify writing bits

  3 mars, par Andreas Rheinhardt

  avcodec/mpeg12enc: Simplify writing bits
  
  Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mpeg12enc.c