问题
I've been looking for a while now for any java library that allows me to encode and decode a PCM-AMR audio stream that is sent through a TCP socket connection. Without having to use Android's JNI.
Is there anything that can help me?
In the worst case scenario. How can I do it using any C++ library with JNI? (any reference of how to use ffmpeg with JNI will be appreciated)
Hope you can help me.
回答1:
Note that pcm usually means RAW and note encoded downstream of the microphone (hardware ) that generated the signal. amr-nb, amr-wb are encoded. So, i suggest that you resolve exactly what type of bytestream that you have on the socket..
Then, IMO , on android, ffmpeg libs provide robust , wide choice of TO/FROM Codecs and the way to convert.
See any of the main github [android-ffmpeg] projects, acouple of which are below:
guardian
halfninja
Its a bit of learn curve to sort thru all the JNI/Android stuff. IMO if you are doing low-level media stuff like this , you have little alternate to mastering JNI.
来源：https://stackoverflow.com/questions/15167663/encoder-decoder-pcm-to-amr-android