yading@10:     The official guide to swresample for confused developers.
yading@10:    =========================================================
yading@10: 
yading@10: Current (simplified) Architecture:
yading@10: ---------------------------------
yading@10:                         Input
yading@10:                           v
yading@10:        __________________/|\___________
yading@10:       /                   |            \
yading@10:      /    input sample format convert   v
yading@10:     /                     | ___________/
yading@10:     |                     |/
yading@10:     |                     v
yading@10:     |         ___________/|\___________              _____________
yading@10:     |        /            |            \            |             |
yading@10:     |   Rematrix          |          resample <---->|   Buffers   |
yading@10:     |        \___________ | ___________/            |_____________|
yading@10:     v                    \|/
yading@10: Special Converter         v
yading@10:     v         ___________/|\___________              _____________
yading@10:     |        /            |            \            |             |
yading@10:     |   Rematrix          |          resample <---->|   Buffers   |
yading@10:     |        \___________ | ___________/            |_____________|
yading@10:     |                    \|/
yading@10:     |                     v
yading@10:     |                     |\___________
yading@10:     \                     |            \
yading@10:      \   output sample format convert   v
yading@10:       \_________________  | ___________/
yading@10:                          \|/
yading@10:                           v
yading@10:                         Output
yading@10: 
yading@10: Planar/Packed conversion is done when needed during sample format conversion.
yading@10: Every step can be skipped without memcpy when it is not needed.
yading@10: Either Resampling and Rematrixing can be performed first depending on which
yading@10: way it is faster.
yading@10: The Buffers are needed for resampling due to resamplng being a process that
yading@10: requires future and past data, it thus also introduces inevitably a delay when
yading@10: used.
yading@10: Internally 32bit float and 16bit int is supported currently, other formats can
yading@10: easily be added.
yading@10: Externally all sample formats in packed and planar configuration are supported
yading@10: It's also trivial to add special converters for common cases.
yading@10: If only sample format and/or packed/planar conversion is needed, it
yading@10: is performed from input to output directly in a single pass with no intermediates.