19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.media; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.InputStream; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * AmrInputStream 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic final class AmrInputStream extends InputStream 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static { 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.loadLibrary("media_jni"); 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static String TAG = "AmrInputStream"; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // frame is 20 msec at 8.000 khz 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int SAMPLES_PER_FRAME = 8000 * 20 / 1000; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // pcm input stream 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private InputStream mInputStream; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // native handle 42b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private long mGae; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // result amr stream 4530c918ce7fbe171944b28fc91b3f22b3d631872dGlenn Kasten private final byte[] mBuf = new byte[SAMPLES_PER_FRAME * 2]; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mBufIn = 0; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mBufOut = 0; 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // helper for bytewise read() 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private byte[] mOneByte = new byte[1]; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create a new AmrInputStream, which converts 16 bit PCM to AMR 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param inputStream InputStream containing 16 bit PCM. 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public AmrInputStream(InputStream inputStream) { 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInputStream = inputStream; 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGae = GsmAmrEncoderNew(); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project GsmAmrEncoderInitialize(mGae); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int read() throws IOException { 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int rtn = read(mOneByte, 0, 1); 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return rtn == 1 ? (0xff & mOneByte[0]) : -1; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int read(byte[] b) throws IOException { 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return read(b, 0, b.length); 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int read(byte[] b, int offset, int length) throws IOException { 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGae == 0) throw new IllegalStateException("not open"); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // local buffer of amr encoded audio empty 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mBufOut >= mBufIn) { 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // reset the buffer 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBufOut = 0; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBufIn = 0; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fetch a 20 msec frame of pcm 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < SAMPLES_PER_FRAME * 2; ) { 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = mInputStream.read(mBuf, i, SAMPLES_PER_FRAME * 2 - i); 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (n == -1) return -1; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project i += n; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // encode it 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBufIn = GsmAmrEncoderEncode(mGae, mBuf, 0, mBuf, 0); 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // return encoded audio to user 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (length > mBufIn - mBufOut) length = mBufIn - mBufOut; 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mBuf, mBufOut, b, offset, length); 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBufOut += length; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return length; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void close() throws IOException { 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mInputStream != null) mInputStream.close(); 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInputStream = null; 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGae != 0) GsmAmrEncoderCleanup(mGae); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGae != 0) GsmAmrEncoderDelete(mGae); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGae = 0; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void finalize() throws Throwable { 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGae != 0) { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project close(); 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("someone forgot to close AmrInputStream"); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // AudioRecord JNI interface 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 131b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private static native long GsmAmrEncoderNew(); 132b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private static native void GsmAmrEncoderInitialize(long gae); 133b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private static native int GsmAmrEncoderEncode(long gae, 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byte[] pcm, int pcmOffset, byte[] amr, int amrOffset) throws IOException; 135b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private static native void GsmAmrEncoderCleanup(long gae); 136b348c3fd87bff8641bb0c2fc475742f1847a4784Ashok Bhat private static native void GsmAmrEncoderDelete(long gae); 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 139