class QueueInputFormatDetails

If the input format details are still the same as specified during

StreamProcessor creation, this message is unnecessary and does not need

to be sent.

If the stream doesn't exist yet, this message creates the stream.

The server won't send OnOutputConstraints() until after the client has

sent at least one QueueInput* message.

All servers must permit QueueInputFormatDetails() at the start of a

stream without failing, as long as the new format is supported by the

StreamProcessor instance. Technically this allows for a server to only

support the exact input format set during StreamProcessor creation, and

that is by design. A client that tries to switch formats and gets a

StreamProcessor channel failure should try again one more time with a

fresh StreamProcessor instance created with CodecFactory using the new

input format during creation, before giving up.

These format details override the format details specified during stream

processor creation for this stream only. The next stream will default

back to the format details set during stream processor creation.

This message is permitted at the start of the first stream (just like at

the start of any stream). The format specified need not match what was

specified during stream processor creation, but if it doesn't match, the

StreamProcessor channel might close as described above.