Add PayloadToMimeType map to StreamInfo

[5ur3]

https://github.com/pion/interceptor/pull/346

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:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 63.16%. Comparing base (4c1af4c) to head (801af07). :warning: Report is 27 commits behind head on master.

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@@             Coverage Diff             @@
##           master    #3175       +/-   ##
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- Coverage   78.03%   63.16%   -14.87%     
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  Files          93       72       -21     
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- Hits         9184     2967     -6217     
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[5ur3]

Thanks for reviewing it, is it possible to change the member in StreamInfo so it would fit? For example:

• Add a member that would contain only payload type and mime type (minimum amount of redundant information needed for RED FEC decoder interceptor implementation)
• Store negotiated codecs information in private field and make a getter method: StreamInfo.GetCodecForPayloadType(uint8) (RTPCodecParameters, error)

Or maybe it can be merged if I provide an example of using this new StreamInfo API by contributing RED FEC decoder interceptor to pion/interceptor/pkg/?

[JoTurk]

Add a member that would contain only payload type and mime type (minimum amount of redundant information needed for RED FEC decoder interceptor implementation)

This sound like a good call, we should only add the information that we need, We might need to refactor streaminfo by the next major version anyways so it contains a slice of codec values.

[5ur3]

@JoeTurki Is this better? I have replaced the Codecs field with the PayloadToMimeType map

[JoTurk]

@JoeTurki Is this better? I have replaced the Codecs field with the PayloadToMimeType map

I like this more, but maybe we need to explain what it's doing in the code or maybe rename it to something more readable, not sure what will work best, but as of right now for someone reading the code they might have hard time understanding what it's actually doing!