srt, udp: support reading and writing MPEG-1 audio streams

[aler9]

No description provided.

[codecov]

Codecov Report

Merging #2147 (f55691b) into main (bc3084a) will decrease coverage by 0.33%.
Report is 1 commits behind head on main.
The diff coverage is 8.48%.

@@            Coverage Diff             @@
##             main    #2147      +/-   ##
==========================================
- Coverage   61.17%   60.85%   -0.33%     
==========================================
  Files         113      113              
  Lines       12527    12598      +71     
==========================================
+ Hits         7664     7667       +3     
- Misses       4311     4378      +67     
- Partials      552      553       +1     

Files Changed	Coverage Δ
internal/core/rtmp_conn.go	61.18% <0.00%> (ø)
internal/core/rtmp_source.go	67.40% <0.00%> (-0.75%)	⬇️
internal/core/srt_source.go	41.01% <0.00%> (-5.49%)	⬇️
internal/core/udp_source.go	0.00% <0.00%> (ø)
internal/formatprocessor/mpeg1audio.go	0.00% <0.00%> (ø)
internal/formatprocessor/processor.go	45.45% <0.00%> (ø)
internal/rtmp/reader.go	43.25% <0.00%> (ø)
internal/rtmp/writer.go	45.71% <0.00%> (ø)
internal/core/srt_conn.go	44.69% <11.84%> (-1.99%)	⬇️
internal/core/hls_source.go	65.54% <50.00%> (ø)
... and 1 more

... and 2 files with indirect coverage changes

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