Add interactive pause/resume functionality

[GitHub pull_request - edited]

alsa-project/tinycompress pull request #14 was edited from LaurentiuM1234:

We want to be able to interactively pause and resume the stream.

Initially, when trying to play an MP3 song, cplay would hang during the polling on compress_write. The cause for this was the fact that, after calling `get_codec_mp3`, the file pointer would point to the first MP3 data, leaving out the first MP3 header. I'm assuming that this would cause the codec to be unable to process the received frames since it wouldn't be able to find the first MP3 header.

In order to be able to use the pause/resume functionality on MP3 streams, this problem had to be addressed before adding the actual functionality.

Request URL   : https://github.com/alsa-project/tinycompress/pull/14
Patch URL     : https://github.com/alsa-project/tinycompress/pull/14.patch
Repository URL: https://github.com/alsa-project/tinycompress