/* * Copyright (C) 2007 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 android.hardware.Camera; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.util.Log; import android.view.Surface; import java.io.FileDescriptor; import java.io.FileOutputStream; import java.io.IOException; import java.lang.ref.WeakReference; /** * Used to record audio and video. The recording control is based on a * simple state machine (see below). * *

*

* *

A common case of using MediaRecorder to record audio works as follows: * *

MediaRecorder recorder = new MediaRecorder();
 * recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
 * recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
 * recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
 * recorder.setOutputFile(PATH_NAME);
 * recorder.prepare();
 * recorder.start();   // Recording is now started
 * ...
 * recorder.stop();
 * recorder.reset();   // You can reuse the object by going back to setAudioSource() step
 * recorder.release(); // Now the object cannot be reused
 * 
* *

Applications may want to register for informational and error * events in order to be informed of some internal update and possible * runtime errors during recording. Registration for such events is * done by setting the appropriate listeners (via calls * (to {@link #setOnInfoListener(OnInfoListener)}setOnInfoListener and/or * {@link #setOnErrorListener(OnErrorListener)}setOnErrorListener). * In order to receive the respective callback associated with these listeners, * applications are required to create MediaRecorder objects on threads with a * Looper running (the main UI thread by default already has a Looper running). * *

Note: Currently, MediaRecorder does not work on the emulator. * *

*

Developer Guides

*

For more information about how to use MediaRecorder for recording video, read the * Camera developer guide. * For more information about how to use MediaRecorder for recording sound, read the * Audio Capture developer guide.

*
*/ public class MediaRecorder { static { System.loadLibrary("media_jni"); native_init(); } private final static String TAG = "MediaRecorder"; // The two fields below are accessed by native methods @SuppressWarnings("unused") private int mNativeContext; @SuppressWarnings("unused") private Surface mSurface; private String mPath; private FileDescriptor mFd; private EventHandler mEventHandler; private OnErrorListener mOnErrorListener; private OnInfoListener mOnInfoListener; /** * Default constructor. */ public MediaRecorder() { Looper looper; if ((looper = Looper.myLooper()) != null) { mEventHandler = new EventHandler(this, looper); } else if ((looper = Looper.getMainLooper()) != null) { mEventHandler = new EventHandler(this, looper); } else { mEventHandler = null; } /* Native setup requires a weak reference to our object. * It's easier to create it here than in C++. */ native_setup(new WeakReference(this)); } /** * Sets a Camera to use for recording. Use this function to switch * quickly between preview and capture mode without a teardown of * the camera object. {@link android.hardware.Camera#unlock()} should be * called before this. Must call before prepare(). * * @param c the Camera to use for recording */ public native void setCamera(Camera c); /** * Sets a Surface to show a preview of recorded media (video). Calls this * before prepare() to make sure that the desirable preview display is * set. If {@link #setCamera(Camera)} is used and the surface has been * already set to the camera, application do not need to call this. If * this is called with non-null surface, the preview surface of the camera * will be replaced by the new surface. If this method is called with null * surface or not called at all, media recorder will not change the preview * surface of the camera. * * @param sv the Surface to use for the preview * @see android.hardware.Camera#setPreviewDisplay(android.view.SurfaceHolder) */ public void setPreviewDisplay(Surface sv) { mSurface = sv; } /** * Defines the audio source. These constants are used with * {@link MediaRecorder#setAudioSource(int)}. */ public final class AudioSource { /* Do not change these values without updating their counterparts * in system/core/include/system/audio.h! */ private AudioSource() {} /** Default audio source **/ public static final int DEFAULT = 0; /** Microphone audio source */ public static final int MIC = 1; /** Voice call uplink (Tx) audio source */ public static final int VOICE_UPLINK = 2; /** Voice call downlink (Rx) audio source */ public static final int VOICE_DOWNLINK = 3; /** Voice call uplink + downlink audio source */ public static final int VOICE_CALL = 4; /** Microphone audio source with same orientation as camera if available, the main * device microphone otherwise */ public static final int CAMCORDER = 5; /** Microphone audio source tuned for voice recognition if available, behaves like * {@link #DEFAULT} otherwise. */ public static final int VOICE_RECOGNITION = 6; /** Microphone audio source tuned for voice communications such as VoIP. It * will for instance take advantage of echo cancellation or automatic gain control * if available. It otherwise behaves like {@link #DEFAULT} if no voice processing * is applied. */ public static final int VOICE_COMMUNICATION = 7; } /** * Defines the video source. These constants are used with * {@link MediaRecorder#setVideoSource(int)}. */ public final class VideoSource { /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ private VideoSource() {} public static final int DEFAULT = 0; /** Camera video source */ public static final int CAMERA = 1; /** @hide */ public static final int GRALLOC_BUFFER = 2; } /** * Defines the output format. These constants are used with * {@link MediaRecorder#setOutputFormat(int)}. */ public final class OutputFormat { /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ private OutputFormat() {} public static final int DEFAULT = 0; /** 3GPP media file format*/ public static final int THREE_GPP = 1; /** MPEG4 media file format*/ public static final int MPEG_4 = 2; /** The following formats are audio only .aac or .amr formats */ /** * AMR NB file format * @deprecated Deprecated in favor of MediaRecorder.OutputFormat.AMR_NB */ public static final int RAW_AMR = 3; /** AMR NB file format */ public static final int AMR_NB = 3; /** AMR WB file format */ public static final int AMR_WB = 4; /** @hide AAC ADIF file format */ public static final int AAC_ADIF = 5; /** AAC ADTS file format */ public static final int AAC_ADTS = 6; /** @hide Stream over a socket, limited to a single stream */ public static final int OUTPUT_FORMAT_RTP_AVP = 7; /** @hide H.264/AAC data encapsulated in MPEG2/TS */ public static final int OUTPUT_FORMAT_MPEG2TS = 8; }; /** * Defines the audio encoding. These constants are used with * {@link MediaRecorder#setAudioEncoder(int)}. */ public final class AudioEncoder { /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ private AudioEncoder() {} public static final int DEFAULT = 0; /** AMR (Narrowband) audio codec */ public static final int AMR_NB = 1; /** AMR (Wideband) audio codec */ public static final int AMR_WB = 2; /** AAC Low Complexity (AAC-LC) audio codec */ public static final int AAC = 3; /** High Efficiency AAC (HE-AAC) audio codec */ public static final int HE_AAC = 4; /** Enhanced Low Delay AAC (AAC-ELD) audio codec */ public static final int AAC_ELD = 5; } /** * Defines the video encoding. These constants are used with * {@link MediaRecorder#setVideoEncoder(int)}. */ public final class VideoEncoder { /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ private VideoEncoder() {} public static final int DEFAULT = 0; public static final int H263 = 1; public static final int H264 = 2; public static final int MPEG_4_SP = 3; } /** * Sets the audio source to be used for recording. If this method is not * called, the output file will not contain an audio track. The source needs * to be specified before setting recording-parameters or encoders. Call * this only before setOutputFormat(). * * @param audio_source the audio source to use * @throws IllegalStateException if it is called after setOutputFormat() * @see android.media.MediaRecorder.AudioSource */ public native void setAudioSource(int audio_source) throws IllegalStateException; /** * Gets the maximum value for audio sources. * @see android.media.MediaRecorder.AudioSource */ public static final int getAudioSourceMax() { return AudioSource.VOICE_COMMUNICATION; } /** * Sets the video source to be used for recording. If this method is not * called, the output file will not contain an video track. The source needs * to be specified before setting recording-parameters or encoders. Call * this only before setOutputFormat(). * * @param video_source the video source to use * @throws IllegalStateException if it is called after setOutputFormat() * @see android.media.MediaRecorder.VideoSource */ public native void setVideoSource(int video_source) throws IllegalStateException; /** * Uses the settings from a CamcorderProfile object for recording. This method should * be called after the video AND audio sources are set, and before setOutputFile(). * If a time lapse CamcorderProfile is used, audio related source or recording * parameters are ignored. * * @param profile the CamcorderProfile to use * @see android.media.CamcorderProfile */ public void setProfile(CamcorderProfile profile) { setOutputFormat(profile.fileFormat); setVideoFrameRate(profile.videoFrameRate); setVideoSize(profile.videoFrameWidth, profile.videoFrameHeight); setVideoEncodingBitRate(profile.videoBitRate); setVideoEncoder(profile.videoCodec); if (profile.quality >= CamcorderProfile.QUALITY_TIME_LAPSE_LOW && profile.quality <= CamcorderProfile.QUALITY_TIME_LAPSE_QVGA) { // Nothing needs to be done. Call to setCaptureRate() enables // time lapse video recording. } else { setAudioEncodingBitRate(profile.audioBitRate); setAudioChannels(profile.audioChannels); setAudioSamplingRate(profile.audioSampleRate); setAudioEncoder(profile.audioCodec); } } /** * Set video frame capture rate. This can be used to set a different video frame capture * rate than the recorded video's playback rate. This method also sets the recording mode * to time lapse. In time lapse video recording, only video is recorded. Audio related * parameters are ignored when a time lapse recording session starts, if an application * sets them. * * @param fps Rate at which frames should be captured in frames per second. * The fps can go as low as desired. However the fastest fps will be limited by the hardware. * For resolutions that can be captured by the video camera, the fastest fps can be computed using * {@link android.hardware.Camera.Parameters#getPreviewFpsRange(int[])}. For higher * resolutions the fastest fps may be more restrictive. * Note that the recorder cannot guarantee that frames will be captured at the * given rate due to camera/encoder limitations. However it tries to be as close as * possible. */ public void setCaptureRate(double fps) { // Make sure that time lapse is enabled when this method is called. setParameter(String.format("time-lapse-enable=1")); double timeBetweenFrameCapture = 1 / fps; int timeBetweenFrameCaptureMs = (int) (1000 * timeBetweenFrameCapture); setParameter(String.format("time-between-time-lapse-frame-capture=%d", timeBetweenFrameCaptureMs)); } /** * Sets the orientation hint for output video playback. * This method should be called before prepare(). This method will not * trigger the source video frame to rotate during video recording, but to * add a composition matrix containing the rotation angle in the output * video if the output format is OutputFormat.THREE_GPP or * OutputFormat.MPEG_4 so that a video player can choose the proper * orientation for playback. Note that some video players may choose * to ignore the compostion matrix in a video during playback. * * @param degrees the angle to be rotated clockwise in degrees. * The supported angles are 0, 90, 180, and 270 degrees. * @throws IllegalArgumentException if the angle is not supported. * */ public void setOrientationHint(int degrees) { if (degrees != 0 && degrees != 90 && degrees != 180 && degrees != 270) { throw new IllegalArgumentException("Unsupported angle: " + degrees); } setParameter("video-param-rotation-angle-degrees=" + degrees); } /** * Set and store the geodata (latitude and longitude) in the output file. * This method should be called before prepare(). The geodata is * stored in udta box if the output format is OutputFormat.THREE_GPP * or OutputFormat.MPEG_4, and is ignored for other output formats. * The geodata is stored according to ISO-6709 standard. * * @param latitude latitude in degrees. Its value must be in the * range [-90, 90]. * @param longitude longitude in degrees. Its value must be in the * range [-180, 180]. * * @throws IllegalArgumentException if the given latitude or * longitude is out of range. * */ public void setLocation(float latitude, float longitude) { int latitudex10000 = (int) (latitude * 10000 + 0.5); int longitudex10000 = (int) (longitude * 10000 + 0.5); if (latitudex10000 > 900000 || latitudex10000 < -900000) { String msg = "Latitude: " + latitude + " out of range."; throw new IllegalArgumentException(msg); } if (longitudex10000 > 1800000 || longitudex10000 < -1800000) { String msg = "Longitude: " + longitude + " out of range"; throw new IllegalArgumentException(msg); } setParameter("param-geotag-latitude=" + latitudex10000); setParameter("param-geotag-longitude=" + longitudex10000); } /** * Sets the format of the output file produced during recording. Call this * after setAudioSource()/setVideoSource() but before prepare(). * *

It is recommended to always use 3GP format when using the H.263 * video encoder and AMR audio encoder. Using an MPEG-4 container format * may confuse some desktop players.

* * @param output_format the output format to use. The output format * needs to be specified before setting recording-parameters or encoders. * @throws IllegalStateException if it is called after prepare() or before * setAudioSource()/setVideoSource(). * @see android.media.MediaRecorder.OutputFormat */ public native void setOutputFormat(int output_format) throws IllegalStateException; /** * Sets the width and height of the video to be captured. Must be called * after setVideoSource(). Call this after setOutFormat() but before * prepare(). * * @param width the width of the video to be captured * @param height the height of the video to be captured * @throws IllegalStateException if it is called after * prepare() or before setOutputFormat() */ public native void setVideoSize(int width, int height) throws IllegalStateException; /** * Sets the frame rate of the video to be captured. Must be called * after setVideoSource(). Call this after setOutFormat() but before * prepare(). * * @param rate the number of frames per second of video to capture * @throws IllegalStateException if it is called after * prepare() or before setOutputFormat(). * * NOTE: On some devices that have auto-frame rate, this sets the * maximum frame rate, not a constant frame rate. Actual frame rate * will vary according to lighting conditions. */ public native void setVideoFrameRate(int rate) throws IllegalStateException; /** * Sets the maximum duration (in ms) of the recording session. * Call this after setOutFormat() but before prepare(). * After recording reaches the specified duration, a notification * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} * and recording will be stopped. Stopping happens asynchronously, there * is no guarantee that the recorder will have stopped by the time the * listener is notified. * * @param max_duration_ms the maximum duration in ms (if zero or negative, disables the duration limit) * */ public native void setMaxDuration(int max_duration_ms) throws IllegalArgumentException; /** * Sets the maximum filesize (in bytes) of the recording session. * Call this after setOutFormat() but before prepare(). * After recording reaches the specified filesize, a notification * will be sent to the {@link android.media.MediaRecorder.OnInfoListener} * with a "what" code of {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} * and recording will be stopped. Stopping happens asynchronously, there * is no guarantee that the recorder will have stopped by the time the * listener is notified. * * @param max_filesize_bytes the maximum filesize in bytes (if zero or negative, disables the limit) * */ public native void setMaxFileSize(long max_filesize_bytes) throws IllegalArgumentException; /** * Sets the audio encoder to be used for recording. If this method is not * called, the output file will not contain an audio track. Call this after * setOutputFormat() but before prepare(). * * @param audio_encoder the audio encoder to use. * @throws IllegalStateException if it is called before * setOutputFormat() or after prepare(). * @see android.media.MediaRecorder.AudioEncoder */ public native void setAudioEncoder(int audio_encoder) throws IllegalStateException; /** * Sets the video encoder to be used for recording. If this method is not * called, the output file will not contain an video track. Call this after * setOutputFormat() and before prepare(). * * @param video_encoder the video encoder to use. * @throws IllegalStateException if it is called before * setOutputFormat() or after prepare() * @see android.media.MediaRecorder.VideoEncoder */ public native void setVideoEncoder(int video_encoder) throws IllegalStateException; /** * Sets the audio sampling rate for recording. Call this method before prepare(). * Prepare() may perform additional checks on the parameter to make sure whether * the specified audio sampling rate is applicable. The sampling rate really depends * on the format for the audio recording, as well as the capabilities of the platform. * For instance, the sampling rate supported by AAC audio coding standard ranges * from 8 to 96 kHz, the sampling rate supported by AMRNB is 8kHz, and the sampling * rate supported by AMRWB is 16kHz. Please consult with the related audio coding * standard for the supported audio sampling rate. * * @param samplingRate the sampling rate for audio in samples per second. */ public void setAudioSamplingRate(int samplingRate) { if (samplingRate <= 0) { throw new IllegalArgumentException("Audio sampling rate is not positive"); } setParameter("audio-param-sampling-rate=" + samplingRate); } /** * Sets the number of audio channels for recording. Call this method before prepare(). * Prepare() may perform additional checks on the parameter to make sure whether the * specified number of audio channels are applicable. * * @param numChannels the number of audio channels. Usually it is either 1 (mono) or 2 * (stereo). */ public void setAudioChannels(int numChannels) { if (numChannels <= 0) { throw new IllegalArgumentException("Number of channels is not positive"); } setParameter("audio-param-number-of-channels=" + numChannels); } /** * Sets the audio encoding bit rate for recording. Call this method before prepare(). * Prepare() may perform additional checks on the parameter to make sure whether the * specified bit rate is applicable, and sometimes the passed bitRate will be clipped * internally to ensure the audio recording can proceed smoothly based on the * capabilities of the platform. * * @param bitRate the audio encoding bit rate in bits per second. */ public void setAudioEncodingBitRate(int bitRate) { if (bitRate <= 0) { throw new IllegalArgumentException("Audio encoding bit rate is not positive"); } setParameter("audio-param-encoding-bitrate=" + bitRate); } /** * Sets the video encoding bit rate for recording. Call this method before prepare(). * Prepare() may perform additional checks on the parameter to make sure whether the * specified bit rate is applicable, and sometimes the passed bitRate will be * clipped internally to ensure the video recording can proceed smoothly based on * the capabilities of the platform. * * @param bitRate the video encoding bit rate in bits per second. */ public void setVideoEncodingBitRate(int bitRate) { if (bitRate <= 0) { throw new IllegalArgumentException("Video encoding bit rate is not positive"); } setParameter("video-param-encoding-bitrate=" + bitRate); } /** * Currently not implemented. It does nothing. * @deprecated Time lapse mode video recording using camera still image capture * is not desirable, and will not be supported. * @hide */ public void setAuxiliaryOutputFile(FileDescriptor fd) { Log.w(TAG, "setAuxiliaryOutputFile(FileDescriptor) is no longer supported."); } /** * Currently not implemented. It does nothing. * @deprecated Time lapse mode video recording using camera still image capture * is not desirable, and will not be supported. * @hide */ public void setAuxiliaryOutputFile(String path) { Log.w(TAG, "setAuxiliaryOutputFile(String) is no longer supported."); } /** * Pass in the file descriptor of the file to be written. Call this after * setOutputFormat() but before prepare(). * * @param fd an open file descriptor to be written into. * @throws IllegalStateException if it is called before * setOutputFormat() or after prepare() */ public void setOutputFile(FileDescriptor fd) throws IllegalStateException { mPath = null; mFd = fd; } /** * Sets the path of the output file to be produced. Call this after * setOutputFormat() but before prepare(). * * @param path The pathname to use. * @throws IllegalStateException if it is called before * setOutputFormat() or after prepare() */ public void setOutputFile(String path) throws IllegalStateException { mFd = null; mPath = path; } // native implementation private native void _setOutputFile(FileDescriptor fd, long offset, long length) throws IllegalStateException, IOException; private native void _prepare() throws IllegalStateException, IOException; /** * Prepares the recorder to begin capturing and encoding data. This method * must be called after setting up the desired audio and video sources, * encoders, file format, etc., but before start(). * * @throws IllegalStateException if it is called after * start() or before setOutputFormat(). * @throws IOException if prepare fails otherwise. */ public void prepare() throws IllegalStateException, IOException { if (mPath != null) { FileOutputStream fos = new FileOutputStream(mPath); try { _setOutputFile(fos.getFD(), 0, 0); } finally { fos.close(); } } else if (mFd != null) { _setOutputFile(mFd, 0, 0); } else { throw new IOException("No valid output file"); } _prepare(); } /** * Begins capturing and encoding data to the file specified with * setOutputFile(). Call this after prepare(). * *

Since API level 13, if applications set a camera via * {@link #setCamera(Camera)}, the apps can use the camera after this method * call. The apps do not need to lock the camera again. However, if this * method fails, the apps should still lock the camera back. The apps should * not start another recording session during recording. * * @throws IllegalStateException if it is called before * prepare(). */ public native void start() throws IllegalStateException; /** * Stops recording. Call this after start(). Once recording is stopped, * you will have to configure it again as if it has just been constructed. * Note that a RuntimeException is intentionally thrown to the * application, if no valid audio/video data has been received when stop() * is called. This happens if stop() is called immediately after * start(). The failure lets the application take action accordingly to * clean up the output file (delete the output file, for instance), since * the output file is not properly constructed when this happens. * * @throws IllegalStateException if it is called before start() */ public native void stop() throws IllegalStateException; /** * Restarts the MediaRecorder to its idle state. After calling * this method, you will have to configure it again as if it had just been * constructed. */ public void reset() { native_reset(); // make sure none of the listeners get called anymore mEventHandler.removeCallbacksAndMessages(null); } private native void native_reset(); /** * Returns the maximum absolute amplitude that was sampled since the last * call to this method. Call this only after the setAudioSource(). * * @return the maximum absolute amplitude measured since the last call, or * 0 when called for the first time * @throws IllegalStateException if it is called before * the audio source has been set. */ public native int getMaxAmplitude() throws IllegalStateException; /* Do not change this value without updating its counterpart * in include/media/mediarecorder.h! */ /** Unspecified media recorder error. * @see android.media.MediaRecorder.OnErrorListener */ public static final int MEDIA_RECORDER_ERROR_UNKNOWN = 1; /** * Interface definition for a callback to be invoked when an error * occurs while recording. */ public interface OnErrorListener { /** * Called when an error occurs while recording. * * @param mr the MediaRecorder that encountered the error * @param what the type of error that has occurred: *

* @param extra an extra code, specific to the error type */ void onError(MediaRecorder mr, int what, int extra); } /** * Register a callback to be invoked when an error occurs while * recording. * * @param l the callback that will be run */ public void setOnErrorListener(OnErrorListener l) { mOnErrorListener = l; } /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ /** Unspecified media recorder error. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_UNKNOWN = 1; /** A maximum duration had been setup and has now been reached. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_MAX_DURATION_REACHED = 800; /** A maximum filesize had been setup and has now been reached. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED = 801; /** informational events for individual tracks, for testing purpose. * The track informational event usually contains two parts in the ext1 * arg of the onInfo() callback: bit 31-28 contains the track id; and * the rest of the 28 bits contains the informational event defined here. * For example, ext1 = (1 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the * track id is 1 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE; * while ext1 = (0 << 28 | MEDIA_RECORDER_TRACK_INFO_TYPE) if the track * id is 0 for informational event MEDIA_RECORDER_TRACK_INFO_TYPE. The * application should extract the track id and the type of informational * event from ext1, accordingly. * * FIXME: * Please update the comment for onInfo also when these * events are unhidden so that application knows how to extract the track * id and the informational event type from onInfo callback. * * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_LIST_START = 1000; /** Signal the completion of the track for the recording session. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS = 1000; /** Indicate the recording progress in time (ms) during recording. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME = 1001; /** Indicate the track type: 0 for Audio and 1 for Video. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_TYPE = 1002; /** Provide the track duration information. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_DURATION_MS = 1003; /** Provide the max chunk duration in time (ms) for the given track. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS = 1004; /** Provide the total number of recordd frames. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES = 1005; /** Provide the max spacing between neighboring chunks for the given track. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS = 1006; /** Provide the elapsed time measuring from the start of the recording * till the first output frame of the given track is received, excluding * any intentional start time offset of a recording session for the * purpose of eliminating the recording sound in the recorded file. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS = 1007; /** Provide the start time difference (delay) betweeen this track and * the start of the movie. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS = 1008; /** Provide the total number of data (in kilo-bytes) encoded. * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES = 1009; /** * {@hide} */ public static final int MEDIA_RECORDER_TRACK_INFO_LIST_END = 2000; /** * Interface definition for a callback to be invoked when an error * occurs while recording. */ public interface OnInfoListener { /** * Called when an error occurs while recording. * * @param mr the MediaRecorder that encountered the error * @param what the type of error that has occurred: * * @param extra an extra code, specific to the error type */ void onInfo(MediaRecorder mr, int what, int extra); } /** * Register a callback to be invoked when an informational event occurs while * recording. * * @param listener the callback that will be run */ public void setOnInfoListener(OnInfoListener listener) { mOnInfoListener = listener; } private class EventHandler extends Handler { private MediaRecorder mMediaRecorder; public EventHandler(MediaRecorder mr, Looper looper) { super(looper); mMediaRecorder = mr; } /* Do not change these values without updating their counterparts * in include/media/mediarecorder.h! */ private static final int MEDIA_RECORDER_EVENT_LIST_START = 1; private static final int MEDIA_RECORDER_EVENT_ERROR = 1; private static final int MEDIA_RECORDER_EVENT_INFO = 2; private static final int MEDIA_RECORDER_EVENT_LIST_END = 99; /* Events related to individual tracks */ private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_START = 100; private static final int MEDIA_RECORDER_TRACK_EVENT_ERROR = 100; private static final int MEDIA_RECORDER_TRACK_EVENT_INFO = 101; private static final int MEDIA_RECORDER_TRACK_EVENT_LIST_END = 1000; @Override public void handleMessage(Message msg) { if (mMediaRecorder.mNativeContext == 0) { Log.w(TAG, "mediarecorder went away with unhandled events"); return; } switch(msg.what) { case MEDIA_RECORDER_EVENT_ERROR: case MEDIA_RECORDER_TRACK_EVENT_ERROR: if (mOnErrorListener != null) mOnErrorListener.onError(mMediaRecorder, msg.arg1, msg.arg2); return; case MEDIA_RECORDER_EVENT_INFO: case MEDIA_RECORDER_TRACK_EVENT_INFO: if (mOnInfoListener != null) mOnInfoListener.onInfo(mMediaRecorder, msg.arg1, msg.arg2); return; default: Log.e(TAG, "Unknown message type " + msg.what); return; } } } /** * Called from native code when an interesting event happens. This method * just uses the EventHandler system to post the event back to the main app thread. * We use a weak reference to the original MediaRecorder object so that the native * code is safe from the object disappearing from underneath it. (This is * the cookie passed to native_setup().) */ private static void postEventFromNative(Object mediarecorder_ref, int what, int arg1, int arg2, Object obj) { MediaRecorder mr = (MediaRecorder)((WeakReference)mediarecorder_ref).get(); if (mr == null) { return; } if (mr.mEventHandler != null) { Message m = mr.mEventHandler.obtainMessage(what, arg1, arg2, obj); mr.mEventHandler.sendMessage(m); } } /** * Releases resources associated with this MediaRecorder object. * It is good practice to call this method when you're done * using the MediaRecorder. In particular, whenever an Activity * of an application is paused (its onPause() method is called), * or stopped (its onStop() method is called), this method should be * invoked to release the MediaRecorder object, unless the application * has a special need to keep the object around. In addition to * unnecessary resources (such as memory and instances of codecs) * being held, failure to call this method immediately if a * MediaRecorder object is no longer needed may also lead to * continuous battery consumption for mobile devices, and recording * failure for other applications if no multiple instances of the * same codec are supported on a device. Even if multiple instances * of the same codec are supported, some performance degradation * may be expected when unnecessary multiple instances are used * at the same time. */ public native void release(); private static native final void native_init(); private native final void native_setup(Object mediarecorder_this) throws IllegalStateException; private native final void native_finalize(); private native void setParameter(String nameValuePair); @Override protected void finalize() { native_finalize(); } }