| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.media; |
| |
| import java.lang.ref.WeakReference; |
| import java.io.OutputStream; |
| import java.io.IOException; |
| import java.lang.IllegalArgumentException; |
| import java.lang.IllegalStateException; |
| import java.lang.Thread; |
| import java.nio.ByteBuffer; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.util.Log; |
| |
| /** |
| * The AudioRecord class manages the audio resources for Java applications |
| * to record audio from the audio input hardware of the platform. This is |
| * achieved by "pulling" (reading) the data from the AudioRecord object. The |
| * application is responsible for polling the AudioRecord object in time using one of |
| * the following three methods: {@link #read(byte[],int, int)}, {@link #read(short[], int, int)} |
| * or {@link #read(ByteBuffer, int)}. The choice of which method to use will be based |
| * on the audio data storage format that is the most convenient for the user of AudioRecord. |
| * <p>Upon creation, an AudioRecord object initializes its associated audio buffer that it will |
| * fill with the new audio data. The size of this buffer, specified during the construction, |
| * determines how long an AudioRecord can record before "over-running" data that has not |
| * been read yet. Data should be from the audio hardware in chunks of sizes inferior to |
| * the total recording buffer size. |
| */ |
| public class AudioRecord |
| { |
| //--------------------------------------------------------- |
| // Constants |
| //-------------------- |
| /** |
| * State of an AudioRecord that was not successfully initialized upon creation |
| */ |
| public static final int STATE_UNINITIALIZED = 0; |
| /** |
| * State of an AudioRecord that is ready to be used |
| */ |
| public static final int STATE_INITIALIZED = 1; |
| |
| /** |
| * State of an AudioRecord this is not recording |
| */ |
| public static final int RECORDSTATE_STOPPED = 1; // matches SL_RECORDSTATE_STOPPED |
| /** |
| * State of an AudioRecord this is recording |
| */ |
| public static final int RECORDSTATE_RECORDING = 3;// matches SL_RECORDSTATE_RECORDING |
| |
| // Error codes: |
| // to keep in sync with frameworks/base/core/jni/android_media_AudioRecord.cpp |
| /** |
| * Denotes a successful operation. |
| */ |
| public static final int SUCCESS = 0; |
| /** |
| * Denotes a generic operation failure. |
| */ |
| public static final int ERROR = -1; |
| /** |
| * Denotes a failure due to the use of an invalid value. |
| */ |
| public static final int ERROR_BAD_VALUE = -2; |
| /** |
| * Denotes a failure due to the improper use of a method. |
| */ |
| public static final int ERROR_INVALID_OPERATION = -3; |
| |
| private static final int AUDIORECORD_ERROR_SETUP_ZEROFRAMECOUNT = -16; |
| private static final int AUDIORECORD_ERROR_SETUP_INVALIDCHANNELCOUNT = -17; |
| private static final int AUDIORECORD_ERROR_SETUP_INVALIDFORMAT = -18; |
| private static final int AUDIORECORD_ERROR_SETUP_INVALIDSTREAMTYPE = -19; |
| private static final int AUDIORECORD_ERROR_SETUP_NATIVEINITFAILED = -20; |
| |
| // Events: |
| // to keep in sync with frameworks/base/include/media/AudioRecord.h |
| /** |
| * Event id for when the recording head has reached a previously set marker. |
| */ |
| private static final int NATIVE_EVENT_MARKER = 2; |
| /** |
| * Event id for when the previously set update period has passed during recording. |
| */ |
| private static final int NATIVE_EVENT_NEW_POS = 3; |
| |
| private final static String TAG = "AudioRecord-Java"; |
| |
| |
| //--------------------------------------------------------- |
| // Used exclusively by native code |
| //-------------------- |
| /** |
| * Accessed by native methods: provides access to C++ AudioRecord object |
| */ |
| @SuppressWarnings("unused") |
| private int mNativeRecorderInJavaObj; |
| /** |
| * Accessed by native methods: provides access to record source constants |
| */ |
| @SuppressWarnings("unused") |
| private final static int SOURCE_DEFAULT = MediaRecorder.AudioSource.DEFAULT; |
| @SuppressWarnings("unused") |
| private final static int SOURCE_MIC = MediaRecorder.AudioSource.MIC; |
| /** |
| * Accessed by native methods: provides access to the callback data. |
| */ |
| @SuppressWarnings("unused") |
| private int mNativeCallbackCookie; |
| |
| |
| //--------------------------------------------------------- |
| // Member variables |
| //-------------------- |
| /** |
| * The audio data sampling rate in Hz. |
| */ |
| private int mSampleRate = 22050; |
| /** |
| * The number of input audio channels (1 is mono, 2 is stereo) |
| */ |
| private int mChannelCount = 1; |
| /** |
| * The current audio channel configuration |
| */ |
| private int mChannelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO; |
| /** |
| * The encoding of the audio samples. |
| * @see AudioFormat#ENCODING_PCM_8BIT |
| * @see AudioFormat#ENCODING_PCM_16BIT |
| */ |
| private int mAudioFormat = AudioFormat.ENCODING_PCM_16BIT; |
| /** |
| * Where the audio data is recorded from. |
| */ |
| private int mRecordSource = MediaRecorder.AudioSource.DEFAULT; |
| /** |
| * Indicates the state of the AudioRecord instance. |
| */ |
| private int mState = STATE_UNINITIALIZED; |
| /** |
| * Indicates the recording state of the AudioRecord instance. |
| */ |
| private int mRecordingState = RECORDSTATE_STOPPED; |
| /** |
| * Lock to make sure mRecordingState updates are reflecting the actual state of the object. |
| */ |
| private Object mRecordingStateLock = new Object(); |
| /** |
| * The listener the AudioRecord notifies when a previously set marker is reached. |
| * @see #setMarkerReachedListener(OnMarkerReachedListener) |
| */ |
| private OnMarkerReachedListener mMarkerListener = null; |
| /** |
| * Lock to protect marker listener updates against event notifications |
| */ |
| private final Object mMarkerListenerLock = new Object(); |
| /** |
| * The listener the AudioRecord notifies periodically during recording. |
| * @see #setPeriodicNotificationListener(OnPeriodicNotificationListener) |
| */ |
| private OnPeriodicNotificationListener mPeriodicListener = null; |
| /** |
| * Lock to protect periodic listener updates against event notifications |
| */ |
| private final Object mPeriodicListenerLock = new Object(); |
| /** |
| * Handler for events coming from the native code |
| */ |
| private NativeEventHandler mNativeEventHandler = null; |
| /** |
| * Size of the native audio buffer. |
| */ |
| private int mNativeBufferSizeInBytes = 0; |
| |
| |
| //--------------------------------------------------------- |
| // Constructor, Finalize |
| //-------------------- |
| /** |
| * Class constructor. |
| * @param audioSource the recording source. See {@link MediaRecorder.AudioSource} for |
| * recording source definitions. |
| * @param sampleRateInHz the sample rate expressed in Hertz. Examples of rates are (but |
| * not limited to) 44100, 22050 and 11025. |
| * @param channelConfig describes the configuration of the audio channels. |
| * See {@link AudioFormat#CHANNEL_CONFIGURATION_MONO} and |
| * {@link AudioFormat#CHANNEL_CONFIGURATION_STEREO} |
| * @param audioFormat the format in which the audio data is represented. |
| * See {@link AudioFormat#ENCODING_PCM_16BIT} and |
| * {@link AudioFormat#ENCODING_PCM_8BIT} |
| * @param bufferSizeInBytes the total size (in bytes) of the buffer where audio data is written |
| * to during the recording. New audio data can be read from this buffer in smaller chunks |
| * than this size. |
| * @throws java.lang.IllegalArgumentException |
| */ |
| public AudioRecord(int audioSource, int sampleRateInHz, int channelConfig, int audioFormat, |
| int bufferSizeInBytes) |
| throws IllegalArgumentException { |
| mState = STATE_UNINITIALIZED; |
| mRecordingState = RECORDSTATE_STOPPED; |
| |
| audioParamCheck(audioSource, sampleRateInHz, channelConfig, audioFormat); |
| |
| audioBuffSizeCheck(bufferSizeInBytes); |
| |
| // native initialization |
| //TODO: update native initialization when information about hardware init failure |
| // due to capture device already open is available. |
| int initResult = native_setup( new WeakReference<AudioRecord>(this), |
| mRecordSource, mSampleRate, mChannelCount, mAudioFormat, mNativeBufferSizeInBytes); |
| if (initResult != SUCCESS) { |
| loge("Error code "+initResult+" when initializing native AudioRecord object."); |
| return; // with mState == STATE_UNINITIALIZED |
| } |
| |
| mState = STATE_INITIALIZED; |
| } |
| |
| |
| // Convenience method for the constructor's parameter checks. |
| // This is where constructor IllegalArgumentException-s are thrown |
| // postconditions: |
| // mRecordSource is valid |
| // mChannelCount is valid |
| // mAudioFormat is valid |
| // mSampleRate is valid |
| private void audioParamCheck(int audioSource, int sampleRateInHz, |
| int channelConfig, int audioFormat) { |
| |
| //-------------- |
| // audio source |
| if ( (audioSource != MediaRecorder.AudioSource.DEFAULT) |
| && (audioSource != MediaRecorder.AudioSource.MIC) ) { |
| throw (new IllegalArgumentException("Invalid audio source.")); |
| } else { |
| mRecordSource = audioSource; |
| } |
| |
| //-------------- |
| // sample rate |
| if ( (sampleRateInHz < 4000) || (sampleRateInHz > 48000) ) { |
| throw (new IllegalArgumentException(sampleRateInHz |
| + "Hz is not a supported sample rate.")); |
| } else { |
| mSampleRate = sampleRateInHz; |
| } |
| |
| //-------------- |
| // channel config |
| switch (channelConfig) { |
| case AudioFormat.CHANNEL_CONFIGURATION_DEFAULT: |
| case AudioFormat.CHANNEL_CONFIGURATION_MONO: |
| mChannelCount = 1; |
| mChannelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO; |
| break; |
| case AudioFormat.CHANNEL_CONFIGURATION_STEREO: |
| mChannelCount = 2; |
| mChannelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_STEREO; |
| break; |
| default: |
| mChannelCount = 0; |
| mChannelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_INVALID; |
| throw (new IllegalArgumentException("Unsupported channel configuration.")); |
| } |
| |
| //-------------- |
| // audio format |
| switch (audioFormat) { |
| case AudioFormat.ENCODING_DEFAULT: |
| mAudioFormat = AudioFormat.ENCODING_PCM_16BIT; |
| break; |
| case AudioFormat.ENCODING_PCM_16BIT: |
| case AudioFormat.ENCODING_PCM_8BIT: |
| mAudioFormat = audioFormat; |
| break; |
| default: |
| mAudioFormat = AudioFormat.ENCODING_INVALID; |
| throw (new IllegalArgumentException("Unsupported sample encoding." |
| + " Should be ENCODING_PCM_8BIT or ENCODING_PCM_16BIT.")); |
| } |
| } |
| |
| |
| // Convenience method for the contructor's audio buffer size check. |
| // preconditions: |
| // mChannelCount is valid |
| // mAudioFormat is AudioFormat.ENCODING_PCM_8BIT OR AudioFormat.ENCODING_PCM_16BIT |
| // postcondition: |
| // mNativeBufferSizeInBytes is valid (multiple of frame size, positive) |
| private void audioBuffSizeCheck(int audioBufferSize) { |
| // NB: this section is only valid with PCM data. |
| // To update when supporting compressed formats |
| int frameSizeInBytes = mChannelCount |
| * (mAudioFormat == AudioFormat.ENCODING_PCM_8BIT ? 1 : 2); |
| if ((audioBufferSize % frameSizeInBytes != 0) || (audioBufferSize < 1)) { |
| throw (new IllegalArgumentException("Invalid audio buffer size.")); |
| } |
| |
| mNativeBufferSizeInBytes = audioBufferSize; |
| } |
| |
| |
| // Convenience method for the creation of the native event handler |
| // It is called only when a non-null event listener is set. |
| // precondition: |
| // mNativeEventHandler is null |
| private void createNativeEventHandler() { |
| Looper looper; |
| if ((looper = Looper.myLooper()) != null) { |
| mNativeEventHandler = new NativeEventHandler(this, looper); |
| } else if ((looper = Looper.getMainLooper()) != null) { |
| mNativeEventHandler = new NativeEventHandler(this, looper); |
| } else { |
| mNativeEventHandler = null; |
| } |
| } |
| |
| |
| /** |
| * Releases the native AudioRecord resources. |
| */ |
| public void release() { |
| try { |
| stop(); |
| } catch(IllegalStateException ise) { |
| // don't raise an exception, we're releasing the resources. |
| } |
| native_release(); |
| mState = STATE_UNINITIALIZED; |
| } |
| |
| |
| @Override |
| protected void finalize() { |
| native_finalize(); |
| } |
| |
| |
| //-------------------------------------------------------------------------- |
| // Getters |
| //-------------------- |
| /** |
| * Returns the configured audio data sample rate in Hz |
| */ |
| public int getSampleRate() { |
| return mSampleRate; |
| } |
| |
| /** |
| * Returns the audio recording source. |
| * @see MediaRecorder.AudioSource |
| */ |
| public int getAudioSource() { |
| return mRecordSource; |
| } |
| |
| /** |
| * Returns the configured audio data format. See {@link AudioFormat#ENCODING_PCM_16BIT} |
| * and {@link AudioFormat#ENCODING_PCM_8BIT}. |
| */ |
| public int getAudioFormat() { |
| return mAudioFormat; |
| } |
| |
| /** |
| * Returns the configured channel configuration. |
| * See {@link AudioFormat#CHANNEL_CONFIGURATION_MONO} |
| * and {@link AudioFormat#CHANNEL_CONFIGURATION_STEREO}. |
| */ |
| public int getChannelConfiguration() { |
| return mChannelConfiguration; |
| } |
| |
| /** |
| * Returns the configured number of channels. |
| */ |
| public int getChannelCount() { |
| return mChannelCount; |
| } |
| |
| /** |
| * Returns the state of the AudioRecord instance. This is useful after the |
| * AudioRecord instance has been created to check if it was initialized |
| * properly. This ensures that the appropriate hardware resources have been |
| * acquired. |
| * @see AudioRecord#STATE_INITIALIZED |
| * @see AudioRecord#STATE_UNINITIALIZED |
| */ |
| public int getState() { |
| return mState; |
| } |
| |
| /** |
| * Returns the recording state of the AudioRecord instance. |
| * @see AudioRecord#RECORDSTATE_STOPPED |
| * @see AudioRecord#RECORDSTATE_RECORDING |
| */ |
| public int getRecordingState() { |
| return mRecordingState; |
| } |
| |
| /** |
| * @return marker position in frames |
| */ |
| public int getNotificationMarkerPosition() { |
| return native_get_marker_pos(); |
| } |
| |
| /** |
| * @return update period in frames |
| */ |
| public int getPositionNotificationPeriod() { |
| return native_get_pos_update_period(); |
| } |
| |
| /** |
| * {@hide} |
| * Returns the minimum buffer size required for the successful creation of an AudioRecord |
| * object. |
| * @param sampleRateInHz the sample rate expressed in Hertz. |
| * @param channelConfig describes the configuration of the audio channels. |
| * See {@link AudioFormat#CHANNEL_CONFIGURATION_MONO} and |
| * {@link AudioFormat#CHANNEL_CONFIGURATION_STEREO} |
| * @param audioFormat the format in which the audio data is represented. |
| * See {@link AudioFormat#ENCODING_PCM_16BIT}. |
| * @return {@link #ERROR_BAD_VALUE} if the recording parameters are not supported by the |
| * hardware, or an invalid parameter was passed, |
| * or {@link #ERROR} if the implementation was unable to query the hardware for its |
| * output properties, |
| * or the minimum buffer size expressed in of bytes. |
| */ |
| static public int getMinBufferSize(int sampleRateInHz, int channelConfig, int audioFormat) { |
| int channelCount = 0; |
| switch(channelConfig) { |
| case AudioFormat.CHANNEL_CONFIGURATION_DEFAULT: |
| case AudioFormat.CHANNEL_CONFIGURATION_MONO: |
| channelCount = 1; |
| break; |
| case AudioFormat.CHANNEL_CONFIGURATION_STEREO: |
| channelCount = 2; |
| break; |
| case AudioFormat.CHANNEL_CONFIGURATION_INVALID: |
| default: |
| loge("getMinBufferSize(): Invalid channel configuration."); |
| return AudioRecord.ERROR_BAD_VALUE; |
| } |
| |
| // PCM_8BIT is not supported at the moment |
| if (audioFormat != AudioFormat.ENCODING_PCM_16BIT) { |
| loge("getMinBufferSize(): Invalid audio format."); |
| return AudioRecord.ERROR_BAD_VALUE; |
| } |
| |
| int size = native_get_min_buff_size(sampleRateInHz, channelCount, audioFormat); |
| if (size == 0) { |
| return AudioRecord.ERROR_BAD_VALUE; |
| } |
| else if (size == -1) { |
| return AudioRecord.ERROR; |
| } |
| else { |
| return size; |
| } |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Transport control methods |
| //-------------------- |
| /** |
| * Starts recording from the AudioRecord instance. |
| * @throws IllegalStateException |
| */ |
| public void startRecording() |
| throws IllegalStateException { |
| if (mState != STATE_INITIALIZED) { |
| throw(new IllegalStateException("startRecording() called on an " |
| +"uninitialized AudioRecord.")); |
| } |
| |
| // start recording |
| synchronized(mRecordingStateLock) { |
| native_start(); |
| mRecordingState = RECORDSTATE_RECORDING; |
| } |
| } |
| |
| |
| |
| /** |
| * Stops recording. |
| * @throws IllegalStateException |
| */ |
| public void stop() |
| throws IllegalStateException { |
| if (mState != STATE_INITIALIZED) { |
| throw(new IllegalStateException("stop() called on an uninitialized AudioRecord.")); |
| } |
| |
| // stop recording |
| synchronized(mRecordingStateLock) { |
| native_stop(); |
| mRecordingState = RECORDSTATE_STOPPED; |
| } |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Audio data supply |
| //-------------------- |
| /** |
| * Reads audio data from the audio hardware for recording into a buffer. |
| * @param audioData the array to which the recorded audio data is written. |
| * @param offsetInBytes index in audioData from which the data is written. |
| * @param sizeInBytes the number of requested bytes. |
| * @return the number of bytes that were read or or {@link #ERROR_INVALID_OPERATION} |
| * if the object wasn't properly initialized, or {@link #ERROR_BAD_VALUE} if |
| * the parameters don't resolve to valid data and indexes. |
| * The number of bytes will not exceed sizeInBytes. |
| */ |
| public int read(byte[] audioData, int offsetInBytes, int sizeInBytes) { |
| if (mState != STATE_INITIALIZED) { |
| return ERROR_INVALID_OPERATION; |
| } |
| |
| if ( (audioData == null) || (offsetInBytes < 0 ) || (sizeInBytes < 0) |
| || (offsetInBytes + sizeInBytes > audioData.length)) { |
| return ERROR_BAD_VALUE; |
| } |
| |
| return native_read_in_byte_array(audioData, offsetInBytes, sizeInBytes); |
| } |
| |
| |
| /** |
| * Reads audio data from the audio hardware for recording into a buffer. |
| * @param audioData the array to which the recorded audio data is written. |
| * @param offsetInShorts index in audioData from which the data is written. |
| * @param sizeInShorts the number of requested shorts. |
| * @return the number of bytes that were read or or {@link #ERROR_INVALID_OPERATION} |
| * if the object wasn't properly initialized, or {@link #ERROR_BAD_VALUE} if |
| * the parameters don't resolve to valid data and indexes. |
| * The number of shorts will not exceed sizeInShorts. |
| */ |
| public int read(short[] audioData, int offsetInShorts, int sizeInShorts) { |
| if (mState != STATE_INITIALIZED) { |
| return ERROR_INVALID_OPERATION; |
| } |
| |
| if ( (audioData == null) || (offsetInShorts < 0 ) || (sizeInShorts < 0) |
| || (offsetInShorts + sizeInShorts > audioData.length)) { |
| return ERROR_BAD_VALUE; |
| } |
| |
| return native_read_in_short_array(audioData, offsetInShorts, sizeInShorts); |
| } |
| |
| |
| /** |
| * Reads audio data from the audio hardware for recording into a direct buffer. If this buffer |
| * is not a direct buffer, this method will always return 0. |
| * @param audioBuffer the direct buffer to which the recorded audio data is written. |
| * @param sizeInBytes the number of requested bytes. |
| * @return the number of bytes that were read or or {@link #ERROR_INVALID_OPERATION} |
| * if the object wasn't properly initialized, or {@link #ERROR_BAD_VALUE} if |
| * the parameters don't resolve to valid data and indexes. |
| * The number of bytes will not exceed sizeInBytes. |
| */ |
| public int read(ByteBuffer audioBuffer, int sizeInBytes) { |
| if (mState != STATE_INITIALIZED) { |
| return ERROR_INVALID_OPERATION; |
| } |
| |
| if ( (audioBuffer == null) || (sizeInBytes < 0) ) { |
| return ERROR_BAD_VALUE; |
| } |
| |
| return native_read_in_direct_buffer(audioBuffer, sizeInBytes); |
| } |
| |
| |
| //-------------------------------------------------------------------------- |
| // Initialization / configuration |
| //-------------------- |
| /** |
| * Sets the listener the AudioRecord notifies when a previously set marker is reached. |
| * @param listener |
| */ |
| public void setMarkerReachedListener(OnMarkerReachedListener listener) { |
| synchronized (mMarkerListenerLock) { |
| mMarkerListener = listener; |
| } |
| if ((listener != null) && (mNativeEventHandler == null)) { |
| createNativeEventHandler(); |
| } |
| } |
| |
| |
| /** |
| * Sets the listener the AudioRecord notifies periodically during recording. |
| * @param listener |
| */ |
| public void setPeriodicNotificationListener(OnPeriodicNotificationListener listener) { |
| synchronized (mPeriodicListenerLock) { |
| mPeriodicListener = listener; |
| } |
| if ((listener != null) && (mNativeEventHandler == null)) { |
| createNativeEventHandler(); |
| } |
| } |
| |
| |
| /** |
| * Sets the marker position at which the listener, if set with |
| * {@link #setMarkerReachedListener(OnMarkerReachedListener)}, is called. |
| * @param markerInFrames marker position expressed in frames |
| * @return error code or success, see {@link #SUCCESS}, {@link #ERROR_BAD_VALUE}, |
| * {@link #ERROR_INVALID_OPERATION} |
| */ |
| public int setNotificationMarkerPosition(int markerInFrames) { |
| return native_set_marker_pos(markerInFrames); |
| } |
| |
| |
| /** |
| * Sets the period at which the listener, if set with |
| * {@link #setPositionNotificationPeriod(int)}, is called. |
| * @param periodInFrames update period expressed in frames |
| * @return error code or success, see {@link #SUCCESS}, {@link #ERROR_INVALID_OPERATION} |
| */ |
| public int setPositionNotificationPeriod(int periodInFrames) { |
| return native_set_pos_update_period(periodInFrames); |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Interface definitions |
| //-------------------- |
| /** |
| * Interface definition for a callback to be invoked when an AudioRecord has |
| * reached a notification marker set by setNotificationMarkerPosition(). |
| */ |
| public interface OnMarkerReachedListener { |
| /** |
| * Called on the listener to notify it that the previously set marker has been reached |
| * by the recording head. |
| */ |
| void onMarkerReached(AudioRecord recorder); |
| } |
| |
| |
| /** |
| * Interface definition for a callback to be invoked for each periodic AudioRecord |
| * update during recording. The update interval is set by setPositionNotificationPeriod(). |
| */ |
| public interface OnPeriodicNotificationListener { |
| /** |
| * Called on the listener to periodically notify it that the recording head has reached |
| * a multiple of the notification period. |
| */ |
| void onPeriodicNotification(AudioRecord recorder); |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Inner classes |
| //-------------------- |
| /** |
| * Helper class to handle the forwarding of native events to the appropriate listeners |
| */ |
| private class NativeEventHandler extends Handler |
| { |
| private AudioRecord mAudioRecord; |
| |
| public NativeEventHandler(AudioRecord ar, Looper looper) { |
| super(looper); |
| mAudioRecord = ar; |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| if (mAudioRecord == null) { |
| return; |
| } |
| switch(msg.what) { |
| case NATIVE_EVENT_MARKER: |
| synchronized (mMarkerListenerLock) { |
| if (mAudioRecord.mMarkerListener != null) { |
| mAudioRecord.mMarkerListener.onMarkerReached(mAudioRecord); |
| } |
| } |
| break; |
| case NATIVE_EVENT_NEW_POS: |
| synchronized (mPeriodicListenerLock) { |
| if (mAudioRecord.mPeriodicListener != null) { |
| mAudioRecord.mPeriodicListener.onPeriodicNotification(mAudioRecord); |
| } |
| } |
| break; |
| default: |
| Log.e(TAG, "[ android.media.AudioRecord.NativeEventHandler ] " + |
| "Unknown event type: " + msg.what); |
| break; |
| } |
| } |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Java methods called from the native side |
| //-------------------- |
| @SuppressWarnings("unused") |
| private static void postEventFromNative(Object audiorecord_ref, |
| int what, int arg1, int arg2, Object obj) { |
| //logd("Event posted from the native side: event="+ what + " args="+ arg1+" "+arg2); |
| AudioRecord recorder = (AudioRecord)((WeakReference)audiorecord_ref).get(); |
| if (recorder == null) { |
| return; |
| } |
| |
| if (recorder.mNativeEventHandler != null) { |
| Message m = recorder.mNativeEventHandler.obtainMessage(what, arg1, arg2, obj); |
| recorder.mNativeEventHandler.sendMessage(m); |
| } |
| |
| } |
| |
| |
| //--------------------------------------------------------- |
| // Native methods called from the Java side |
| //-------------------- |
| |
| private native final int native_setup(Object audiorecord_this, |
| int recordSource, int sampleRate, int nbChannels, int audioFormat, int buffSizeInBytes); |
| |
| private native final void native_finalize(); |
| |
| private native final void native_release(); |
| |
| private native final void native_start(); |
| |
| private native final void native_stop(); |
| |
| private native final int native_read_in_byte_array(byte[] audioData, |
| int offsetInBytes, int sizeInBytes); |
| |
| private native final int native_read_in_short_array(short[] audioData, |
| int offsetInShorts, int sizeInShorts); |
| |
| private native final int native_read_in_direct_buffer(Object jBuffer, int sizeInBytes); |
| |
| private native final int native_set_marker_pos(int marker); |
| private native final int native_get_marker_pos(); |
| |
| private native final int native_set_pos_update_period(int updatePeriod); |
| private native final int native_get_pos_update_period(); |
| |
| static private native final int native_get_min_buff_size( |
| int sampleRateInHz, int channelCount, int audioFormat); |
| |
| |
| //--------------------------------------------------------- |
| // Utility methods |
| //------------------ |
| |
| private static void logd(String msg) { |
| Log.d(TAG, "[ android.media.AudioRecord ] " + msg); |
| } |
| |
| private static void loge(String msg) { |
| Log.e(TAG, "[ android.media.AudioRecord ] " + msg); |
| } |
| |
| } |
| |
| |
| |
| |
| |
