Commits on Apr 14, 2020

1. Replace bitfields in caption_frame_cell_t and caption_frame_state_t s… …

   …tructs with uint8_t
   
   Contrary to what one might believe, this actually reduces the size of
   the structs due to alignment constraints. On Linux x86-64 clang/gcc it
   reduces the size of the caption_frame_t struct from 7760 bytes to 6800
   bytes, on Windows x86-64 MSVC from 11600 bytes to 6800 bytes.
   
   It also causes simpler and potentially faster assembly to be generated
   as the values can be directly accessed as uint8_t instead of having to
   extract the corresponding bits with bitwise operations.

   

   sdroege committed Apr 14, 2020
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