Dear all:
I need the help desparately.
The code is attached below.
If you guys don't mind take a look at the code below and see how to fit
speex's AEC into it.
Help me look at the #defines, and give me some suggestions on the AEC
parameters, I totally have no idea about them.
Feel free to do anything with the code, if it is by any chance valuable.
Any ideas or suggestions or sharing is highly appreciated.
I believe someone has already made AEC to work?!
But beware, this will be used in my Voip program, so it should be async by
nature.
/**
* com_peterhi_Speex.h
*/
#include <jni.h>
#ifndef _Included_com_peterhi_Speex
#define _Included_com_peterhi_Speex
#ifdef __cplusplus
extern "C" {
#endif
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_encoder__(JNIEnv *, jclass);
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_decoder__(JNIEnv *, jclass);
JNIEXPORT void JNICALL Java_com_peterhi_Speex_encoder__I(JNIEnv *, jclass,
jint);
JNIEXPORT void JNICALL Java_com_peterhi_Speex_decoder__I(JNIEnv *, jclass,
jint);
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_encode(JNIEnv *, jclass, jint,
jbyteArray, jbyteArray);
JNIEXPORT void JNICALL Java_com_peterhi_Speex_decode(JNIEnv *, jclass, jint,
jbyteArray, jint, jbyteArray);
#ifdef __cplusplus
}
#endif
#endif
/************************************************************************************************************/
/**
* com_peterhi_Speex.c
*/
#include <speex/speex.h>
#include <speex/speex_preprocess.h>
#include <speex/speex_resampler.h>
#include "com_peterhi_Speex.h"
#define TYPE_ENCODE 1
#define TYPE_DECODE 2
#define DSP_FRAME_SIZE 160
#define ENC_FRAME_SIZE 320
#define FRAME_RATE 8000
int yes = 1;
int quality = 10;
float rate = 8000;
typedef struct {
int type;
SpeexBits bits;
void* pSt;
SpeexPreprocessState* pPre;
// Perhaps the echo state here?
} Codec;
/**
* Creates a new encoder state
*/
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_encoder__(JNIEnv* env, jclass c)
{
Codec* pCodec = malloc(sizeof(Codec));
speex_bits_init(&pCodec->bits);
pCodec->type = TYPE_ENCODE;
pCodec->pSt = speex_encoder_init(speex_lib_get_mode(SPEEX_MODEID_NB));
pCodec->pPre = speex_preprocess_state_init(DSP_FRAME_SIZE, FRAME_RATE);
speex_encoder_ctl(pCodec->pSt, SPEEX_SET_QUALITY, &quality);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_AGC, &yes);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_AGC_LEVEL,
&rate);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_DEREVERB,
&yes);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_DEREVERB_DECAY,
&yes);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_DEREVERB_LEVEL,
&yes);
speex_preprocess_ctl(pCodec->pPre, SPEEX_PREPROCESS_SET_DENOISE,
&yes);
// Any idea how to setup AEC here?
return (jint )pCodec;
}
/**
* Creates a new decoder state
*/
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_decoder__(JNIEnv* env, jclass c)
{
Codec* pCodec = malloc(sizeof(Codec));
speex_bits_init(&pCodec->bits);
pCodec->type = TYPE_DECODE;
pCodec->pSt = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_NB));
return (jint )pCodec;
}
/**
* Destroys a new encoder state
*/
JNIEXPORT void JNICALL Java_com_peterhi_Speex_encoder__I(JNIEnv* env, jclass c,
jint p)
{
Codec* pCodec = (Codec* )p;
if (pCodec->type != TYPE_ENCODE)
{
return;
}
speex_preprocess_state_destroy(pCodec->pPre);
speex_encoder_destroy(pCodec->pSt);
speex_bits_destroy(&pCodec->bits);
free(pCodec);
}
/**
* Destroys a new decoder state
*/
JNIEXPORT void JNICALL Java_com_peterhi_Speex_decoder__I(JNIEnv* env, jclass c,
jint p)
{
Codec* pCodec = (Codec* )p;
if (pCodec->type != TYPE_DECODE)
{
return;
}
speex_bits_destroy(&pCodec->bits);
speex_decoder_destroy(pCodec->pSt);
free(pCodec);
}
/**
* Encode a byte array.
*/
JNIEXPORT jint JNICALL Java_com_peterhi_Speex_encode(JNIEnv* env, jclass c, jint
p, jbyteArray buf1, jbyteArray buf2)
{
jbyte* bytes1 = (*env)->GetByteArrayElements(env, buf1, JNI_FALSE);
jbyte* bytes2 = (*env)->GetByteArrayElements(env, buf2, JNI_FALSE);
int len1 = (*env)->GetArrayLength(env, buf1);
int len2 = (*env)->GetArrayLength(env, buf2);
jint ret = 0;
Codec* pCodec = (Codec* )p;
if (pCodec->type != TYPE_ENCODE)
{
return ret;
}
// How to use AEC to cancel?
speex_preprocess_run(pCodec->pPre, (spx_int16_t* )bytes1);
speex_bits_reset(&pCodec->bits);
speex_encode_int(pCodec->pSt, (spx_int16_t* )bytes1,
&pCodec->bits);
ret = speex_bits_write(&pCodec->bits, bytes2, len2);
(*env)->SetByteArrayRegion(env, buf1, 0, len1, bytes1);
(*env)->SetByteArrayRegion(env, buf2, 0, len2, bytes2);
(*env)->ReleaseByteArrayElements(env, buf1, bytes1, 0);
(*env)->ReleaseByteArrayElements(env, buf2, bytes2, 0);
return ret;
}
/**
* Decode a byte array.
*/
JNIEXPORT void JNICALL Java_com_peterhi_Speex_decode(JNIEnv* env, jclass c, jint
p, jbyteArray buf1, jint len, jbyteArray buf2)
{
jbyte* bytes1 = (*env)->GetByteArrayElements(env, buf1, JNI_FALSE);
jbyte* bytes2 = (*env)->GetByteArrayElements(env, buf2, JNI_FALSE);
int len1 = (*env)->GetArrayLength(env, buf1);
int len2 = (*env)->GetArrayLength(env, buf2);
Codec* pCodec = (Codec* )p;
if (pCodec->type != TYPE_DECODE)
{
return;
}
speex_bits_read_from(&pCodec->bits, bytes1, len);
speex_decode_int(pCodec->pSt, &pCodec->bits, (spx_int16_t*
)bytes2);
(*env)->SetByteArrayRegion(env, buf1, 0, len1, bytes1);
(*env)->SetByteArrayRegion(env, buf2, 0, len2, bytes2);
(*env)->ReleaseByteArrayElements(env, buf1, bytes1, 0);
(*env)->ReleaseByteArrayElements(env, buf2, bytes2, 0);
}
/**************************************************************************************/
/*
* Speex.java
*
* 21 May 2008
*
* copyright : (C) 2008 by Yun Tao Hai and Beijing Teng Yun Software Inc.
* email : hytparadisee at gmail.com
*
* 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 2 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, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package com.peterhi;
public class Speex {
static {
System.loadLibrary("speexjni");
}
public static native int encoder();
public static native int decoder();
public static native void encoder(int peer);
public static native void decoder(int peer);
public static native int encode(int peer, byte[] in, byte[] out);
public static native void decode(int peer, byte[] in, int len, byte[] out);
}
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