export callback prototypes

[aler9]

No description provided.

[codecov]

Codecov Report

Merging #61 (fe825b5) into main (219dc9b) will increase coverage by 0.15%.
The diff coverage is 35.29%.

@@            Coverage Diff             @@
##             main      #61      +/-   ##
==========================================
+ Coverage   70.90%   71.06%   +0.15%     
==========================================
  Files          49       49              
  Lines        4479     4479              
==========================================
+ Hits         3176     3183       +7     
+ Misses       1013     1007       -6     
+ Partials      290      289       -1     

Files Changed	Coverage Δ
client_downloader_primary.go	32.97% <ø> (ø)
client_processor_fmp4.go	58.42% <16.66%> (ø)
client.go	83.33% <42.85%> (ø)
client_processor_mpegts.go	61.25% <50.00%> (ø)

... and 1 file with indirect coverage changes

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