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lukeweberlukeweber
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First of ilbc for android
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‎AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.tuenti.androidilbc"
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android:versionCode="1"
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android:versionName="1.0">
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<uses-sdk android:minSdkVersion="3" />
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</manifest>

‎README.md

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iLBC Android
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==========
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[Internet low bitrate codec](http://en.wikipedia.org/wiki/Internet_Low_Bit_Rate_Codec). This is a swc that wraps the base functionality of the iLBC codec now maintained by google as part of the [WebRTC](http://www.webrtc.org/) project.
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Based loosely on an android version of iLBC at http://code.google.com/p/android-ilbc.
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Changes
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* Built based on webrtc code instead of rfc
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* Adds option to use noise supression from webrtc in the encode method.
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Codec.java included in this project should be compatible with the Demo.java found at http://code.google.com/p/android-ilbc/source/browse/src/com/googlecode/androidilbc/Demo.java except for the package name. As well to make that demo work, you would have to update the AndroidManifest.xml for your purposes.

‎jni/Android.mk

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#ARCH_ARM_HAVE_ARMV7A := true
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TARGET_ARCH := arm
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# Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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#
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# Use of this source code is governed by a BSD-style license
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# that can be found in the LICENSE file in the root of the source
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# tree. An additional intellectual property rights grant can be found
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# in the file PATENTS. All contributing project authors may
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# be found in the AUTHORS file in the root of the source tree.
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ILBC_WRAPPER_MAIN_PATH := $(call my-dir)
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include $(ILBC_WRAPPER_MAIN_PATH)/webrtc/src/common_audio/signal_processing/Android.mk
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include $(ILBC_WRAPPER_MAIN_PATH)/webrtc/src/modules/audio_coding/codecs/ilbc/Android.mk
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include $(ILBC_WRAPPER_MAIN_PATH)/webrtc/src/modules/audio_processing/ns/Android.mk
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LOCAL_PATH := $(ILBC_WRAPPER_MAIN_PATH)
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include $(CLEAR_VARS)
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LOCAL_ARM_MODE := arm
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LOCAL_MODULE_TAGS := optional
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LOCAL_SRC_FILES :=\
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iLBC_codec.c
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LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
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LOCAL_C_INCLUDES := \
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$(LOCAL_PATH)/webrtc/src/modules/audio_coding/codecs/ilbc/interface \
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$(LOCAL_PATH)/webrtc/src/modules/audio_coding/codecs/ilbc/ \
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$(LOCAL_PATH)/webrtc/src/common_audio/signal_processing/include \
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$(LOCAL_PATH)/webrtc/src/modules/audio_processing/ns/include/ \
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$(LOCAL_PATH)/webrtc/src/
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LOCAL_WHOLE_STATIC_LIBRARIES := \
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libwebrtc_ns \
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libwebrtc_spl \
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libwebrtc_ilbc
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LOCAL_MODULE := iLBC_codec
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include $(BUILD_SHARED_LIBRARY)

‎jni/Applicaiton.mk

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# ARMv7 is significanly faster due to the use of the hardware FPU
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APP_STL := gnustl_static
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APP_ABI := armeabi armeabi-v7a
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APP_OPTIM := release
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APP_BUILD_SCRIPT := /Users/lukeweber/iLBC-android-wrapper/jni/Android.mk
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# APP_CPPFLAGS += -fexceptions -frtti

‎jni/iLBC_codec.c

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#include "jni.h"
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "ilbc.h"
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#include "noise_suppression_x.h"
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#include "defines.h"
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#define LOG_TAG "iLBC_codec"
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#include <android/log.h>
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#define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
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#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG , LOG_TAG, __VA_ARGS__)
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#define LOGI(...) __android_log_print(ANDROID_LOG_INFO , LOG_TAG, __VA_ARGS__)
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#define LOGW(...) __android_log_print(ANDROID_LOG_WARN , LOG_TAG, __VA_ARGS__)
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#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR , LOG_TAG, __VA_ARGS__)
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#define JNI_COPY 0
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static iLBC_encinst_t *Enc_Inst = NULL;
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static iLBC_decinst_t *Dec_Inst = NULL;
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static NsxHandle *nsxInst = NULL;
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const short MODE = 30;//30ms
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const short FRAME_SAMPLES = 240;//MODE << 3;//240
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const short FRAME_SIZE = 480;//FRAME_SAMPLES * sizeof(short);//480
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static int encoding, decoding, encoderReset, decoderReset;
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static void noise_supression(short* a, int samples, int ns_mode){
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short tmp_input[80];
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if(nsxInst == NULL){
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WebRtcNsx_Create(&nsxInst);
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WebRtcNsx_Init(nsxInst, 8000);//8000 hz sampling
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WebRtcNsx_set_policy(nsxInst, ns_mode);//0: Mild, 1: Medium , 2: Aggressive
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}
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int i;
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for (i = 0; i < samples; i+= 80){
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memcpy(tmp_input, &a[i], 80 * sizeof(short));
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WebRtcNsx_Process(nsxInst, tmp_input, NULL, (short *)&a[i], NULL);
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}
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}
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static void reset_encoder_impl(){
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if(!encoding){
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WebRtcIlbcfix_EncoderFree(Enc_Inst);
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Enc_Inst = NULL;
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WebRtcNsx_Free(nsxInst);
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nsxInst = NULL;
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encoderReset = 0;
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} else {
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encoderReset = 1;
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}
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}
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jint Java_com_tuenti_androidilbc_Codec_resetEncoder(JNIEnv *env, jobject this){
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reset_encoder_impl();
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return 1;
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}
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jint Java_com_tuenti_androidilbc_Codec_encode(JNIEnv *env, jobject this,
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jbyteArray src, jint src_offset, jint src_len, jbyteArray dest, jint ns_mode)
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{
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jsize src_size, dest_size;
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jbyte *src_bytes, *dest_bytes;
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int bytes_remaining, bytes_encoded, num_samples;
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encoding = 1;
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if(Enc_Inst == NULL){
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WebRtcIlbcfix_EncoderCreate(&Enc_Inst);
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WebRtcIlbcfix_EncoderInit(Enc_Inst, MODE);
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}
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src_size = (*env)->GetArrayLength(env, src);
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src_bytes = (*env)->GetByteArrayElements(env, src, JNI_COPY);
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dest_size = (*env)->GetArrayLength(env, dest);
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dest_bytes = (*env)->GetByteArrayElements(env, dest, JNI_COPY);
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src_bytes += src_offset;
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bytes_remaining = src_len;
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int truncated = bytes_remaining % FRAME_SIZE;
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if(truncated){
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bytes_remaining -= truncated;
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LOGW("Ignoring last %d bytes, input must be divisible by %d", truncated, FRAME_SIZE);
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}
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if(ns_mode < 0 || ns_mode > 2){
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LOGE("Noise supression must be set to a value of 0-3, 0:Off, 1: Mild, 2: Medium , 3: Aggressive");
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return -1;
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}
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if(ns_mode > 0){
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noise_supression((short*)src_bytes, bytes_remaining, ns_mode -1);
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}
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while(bytes_remaining > 0){
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num_samples = WebRtcIlbcfix_Encode(Enc_Inst, (short* )src_bytes, FRAME_SAMPLES, (WebRtc_Word16 *)dest_bytes);
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src_bytes += num_samples * sizeof(short);
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dest_bytes += NO_OF_BYTES_30MS;
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bytes_remaining -= num_samples * sizeof(short);
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bytes_encoded += num_samples * sizeof(short);
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}
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src_bytes -= bytes_encoded;
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dest_bytes -= src_len;
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(*env)->ReleaseByteArrayElements(env, src, src_bytes, JNI_COPY);
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(*env)->ReleaseByteArrayElements(env, dest, dest_bytes, JNI_COPY);
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encoding = 0;
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if(encoderReset){
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reset_encoder_impl();
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}
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return bytes_encoded;
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}
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static void reset_decoder_impl(){
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if(!decoding){
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WebRtcIlbcfix_DecoderFree(Dec_Inst);
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Dec_Inst = NULL;
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decoderReset = 0;
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} else {
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decoderReset = 1;
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}
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}
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jint Java_com_tuenti_androidilbc_Codec_resetDecoder(JNIEnv *env, jobject this){
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reset_decoder_impl();
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return 1;
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}
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jint Java_com_tuenti_androidilbc_Codec_decode(JNIEnv *env, jobject this,
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jbyteArray src, jint src_offset, jint src_len, jbyteArray dest)
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{
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jsize src_size, dest_size;
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jbyte *src_bytes, *dest_bytes;
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int num_samples, bytes_remaining, bytes_decoded;
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short speechType;
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src_size = (*env)->GetArrayLength(env, src);
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src_bytes = (*env)->GetByteArrayElements(env, src, JNI_COPY);
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dest_size = (*env)->GetArrayLength(env, dest);
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dest_bytes = (*env)->GetByteArrayElements(env, dest, JNI_COPY);
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decoding = 1;
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if(Dec_Inst == NULL){
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WebRtcIlbcfix_DecoderCreate(&Dec_Inst);
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WebRtcIlbcfix_DecoderInit(Dec_Inst, MODE);
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}
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src_bytes += src_offset;
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bytes_remaining = src_len;
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int i = 0;
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while(bytes_remaining > 0){
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num_samples = WebRtcIlbcfix_Decode(Dec_Inst, (short *)src_bytes, NO_OF_BYTES_30MS, (short *)dest_bytes, &speechType);
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src_bytes += NO_OF_BYTES_30MS;
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dest_bytes += num_samples * sizeof(short);
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bytes_remaining -= NO_OF_BYTES_30MS;
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bytes_decoded += num_samples * sizeof(short);
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}
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src_bytes -= bytes_decoded;
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dest_bytes -= src_len;
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(*env)->ReleaseByteArrayElements(env, src, src_bytes, JNI_COPY);
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(*env)->ReleaseByteArrayElements(env, dest, dest_bytes, JNI_COPY);
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decoding = 0;
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if(decoderReset){
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reset_decoder_impl();
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}
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return bytes_decoded;
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}

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