1 package org.sipdroid.media.codecs;

     2 

     3 public class GSM extends Codec {

     4 

     5 	public static final CodecInfo mCodecInfo = new CodecInfo();

     6 

     7 	static {

     8 		System.loadLibrary("gsm");

     9 		mCodecInfo.displayName = "GSM";

    10 		mCodecInfo.rtpPayloadName = "GSM";

    11 		mCodecInfo.description = "GSM Full Rate codec";

    12 		mCodecInfo.rtpPayloadCode = 3;

    13 		mCodecInfo.samplingRate = 8000;

    14 		mCodecInfo.rtpSampleDivider = 1;

    15 		mCodecInfo.minFrameTimeMsecs = 20;

    16 		mCodecInfo.codecFrameSize = 33;

    17 		CodecManager.registerAudioCodec(new GSM());

    18 	}

    19 

    20 	public class GSMContext extends Context {

    21 		public long ctx;

    22 	}

    23 

    24 	@Override

    25 	public Context initDecoder() {

    26 		GSMContext decoderCtx = new GSMContext();

    27 		decoderCtx.ctx = GSMJNI.create();

    28 		return decoderCtx;

    29 	}

    30 

    31 	@Override

    32 	public Context initEncoder() {

    33 		GSMContext encoderCtx = new GSMContext();

    34 		encoderCtx.ctx = GSMJNI.create();

    35 		return encoderCtx;

    36 	}

    37 

    38 	@Override

    39 	public void cleanDecoder(Context ctx) {

    40 		GSMJNI.destroy(((GSMContext)ctx).ctx);

    41 	}

    42 

    43 	@Override

    44 	public void cleanEncoder(Context ctx) {

    45 		GSMJNI.destroy(((GSMContext)ctx).ctx);

    46 	}

    47 

    48 	@Override

    49 	public int decode(Context ctx, byte[] indata, int inoffset, int size,

    50 			short[] outsample, int outoffset) {

    51 		return GSMJNI.decode(((GSMContext)ctx).ctx, indata, inoffset, outsample, outoffset);

    52 	}

    53 

    54 	@Override

    55 	public int encode(Context ctx, short[] insample, int inoffset, int size,

    56 			byte[] outdata, int outoffset) {

    57 		GSMJNI.encode(((GSMContext)ctx).ctx, insample, inoffset, outdata, outoffset);

    58 		return size;

    59 	}

    60 

    61 	@Override

    62 	public CodecInfo getInfo() {

    63 		return mCodecInfo;

    64 	}

    65 

    66 	static public void load(){

    67 	}

    68 }