Commits on Jul 4, 2024

1. avfilter/vf_overlay_videotoolbox: add fast code path for bgra overlay …

   The previous implementation needed to convert both main and overlay
   frames to BGRA texture and then convert back to YUV.
   This operation is bandwidth heavy.
   
   Add a faster shader when the overlay is in BGRA format which
   calculates YUV values in the shader. This eliminates the need to
   convert the main frame and does not require extra copy for the
   overlay frame, leading to more than 100% performance improvements
   overlaying 10-bit 1080p HEVC inputs on M1 Max (190fps -> 407fps).
   
   The rgb to yuv formula is currently hard-coded to premultiplied
   BT.709 matrix.

   

   gnattu committed Jul 4, 2024
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