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/*
* Copyright (C) 2014 Andrew Comminos
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package se.lublin.humla.audio.javacpp;
import com.googlecode.javacpp.IntPointer;
import com.googlecode.javacpp.Loader;
import com.googlecode.javacpp.Pointer;
import com.googlecode.javacpp.annotation.Cast;
import com.googlecode.javacpp.annotation.Platform;
import java.nio.ByteBuffer;
import se.lublin.humla.audio.IDecoder;
import se.lublin.humla.exception.NativeAudioException;
import se.lublin.humla.protocol.AudioHandler;
/**
* Created by andrew on 20/10/13.
*/
@Platform(library="jnicelt7", cinclude={"<celt.h>","<celt_types.h>"})
public class CELT7 {
public static final int CELT_GET_BITSTREAM_VERSION = 2000;
public static final int CELT_SET_VBR_RATE_REQUEST = 6;
public static final int CELT_SET_PREDICTION_REQUEST = 4;
static {
Loader.load();
}
public static native Pointer celt_mode_create(int sampleRate, int frameSize, IntPointer error);
public static native int celt_mode_info(@Cast("const CELTMode*") Pointer mode, int request, IntPointer value);
public static native void celt_mode_destroy(@Cast("CELTMode*") Pointer mode);
public static native Pointer celt_decoder_create(@Cast("CELTMode*") Pointer mode, int channels, IntPointer error);
public static native int celt_decode(@Cast("CELTDecoder*") Pointer st, @Cast("const unsigned char*") ByteBuffer data, int len, short[] pcm);
public static native int celt_decode_float(@Cast("CELTDecoder*") Pointer st, @Cast("const unsigned char*") ByteBuffer data, int len, float[] pcm);
public static native int celt_decoder_ctl(@Cast("CELTDecoder*") Pointer st, int request, Pointer val);
public static native void celt_decoder_destroy(@Cast("CELTDecoder*") Pointer st);
public static native Pointer celt_encoder_create(@Cast("const CELTMode *") Pointer mode, int channels, IntPointer error);
public static native int celt_encoder_ctl(@Cast("CELTEncoder*")Pointer state, int request, Pointer val);
public static native int celt_encoder_ctl(@Cast("CELTEncoder*")Pointer state, int request, int val);
public static native int celt_encode(@Cast("CELTEncoder *") Pointer state, @Cast("const short *") short[] pcm, @Cast("short *") short[] optionalSynthesis, @Cast("unsigned char *") byte[] compressed, int nbCompressedBytes);
public static native void celt_encoder_destroy(@Cast("CELTEncoder *") Pointer state);
/**
* @return an integer describing the CELT bitstream version.
*/
public static int getBitstreamVersion() {
IntPointer versionPtr = new IntPointer();
Pointer modePtr = celt_mode_create(AudioHandler.SAMPLE_RATE, AudioHandler.FRAME_SIZE, null);
celt_mode_info(modePtr, CELT_GET_BITSTREAM_VERSION, versionPtr);
celt_mode_destroy(modePtr);
return versionPtr.get();
}
public static class CELT7Decoder implements IDecoder {
private Pointer mMode;
private Pointer mState;
public CELT7Decoder(int sampleRate, int frameSize, int channels) throws NativeAudioException {
IntPointer error = new IntPointer(1);
error.put(0);
mMode = celt_mode_create(sampleRate, frameSize, error);
if(error.get() < 0) throw new NativeAudioException("CELT 0.7.0 decoder initialization failed with error: "+error.get());
mState = celt_decoder_create(mMode, channels, error);
if(error.get() < 0) throw new NativeAudioException("CELT 0.7.0 decoder initialization failed with error: "+error.get());
}
@Override
public int decodeFloat(ByteBuffer input, int inputSize, float[] output, int frameSize) throws NativeAudioException {
int result = celt_decode_float(mState, input, inputSize, output);
if(result < 0) throw new NativeAudioException("CELT 0.7.0 decoding failed with error: "+result);
return frameSize;
}
@Override
public int decodeShort(ByteBuffer input, int inputSize, short[] output, int frameSize) throws NativeAudioException {
int result = celt_decode(mState, input, inputSize, output);
if(result < 0) throw new NativeAudioException("CELT 0.7.0 decoding failed with error: "+result);
return frameSize;
}
@Override
public void destroy() {
celt_decoder_destroy(mState);
celt_mode_destroy(mMode);
}
}
}
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