| /* |
| * 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.app.ActivityThread; |
| 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.IOException; |
| import java.io.RandomAccessFile; |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * Used to record audio and video. The recording control is based on a |
| * simple state machine (see below). |
| * |
| * <p><img src="{@docRoot}images/mediarecorder_state_diagram.gif" border="0" /> |
| * </p> |
| * |
| * <p>A common case of using MediaRecorder to record audio works as follows: |
| * |
| * <pre>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 |
| * </pre> |
| * |
| * <p>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). |
| * |
| * <p><strong>Note:</strong> Currently, MediaRecorder does not work on the emulator. |
| * |
| * <div class="special reference"> |
| * <h3>Developer Guides</h3> |
| * <p>For more information about how to use MediaRecorder for recording video, read the |
| * <a href="{@docRoot}guide/topics/media/camera.html#capture-video">Camera</a> developer guide. |
| * For more information about how to use MediaRecorder for recording sound, read the |
| * <a href="{@docRoot}guide/topics/media/audio-capture.html">Audio Capture</a> developer guide.</p> |
| * </div> |
| */ |
| 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 long 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; |
| } |
| |
| String packageName = ActivityThread.currentPackageName(); |
| /* Native setup requires a weak reference to our object. |
| * It's easier to create it here than in C++. |
| */ |
| native_setup(new WeakReference<MediaRecorder>(this), packageName); |
| } |
| |
| /** |
| * Sets a {@link android.hardware.Camera} to use for recording. |
| * |
| * <p>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 {@link #prepare}.</p> |
| * |
| * @param c the Camera to use for recording |
| * @deprecated Use {@link #getSurface} and the {@link android.hardware.camera2} API instead. |
| */ |
| @Deprecated |
| public native void setCamera(Camera c); |
| |
| /** |
| * Gets the surface to record from when using SURFACE video source. |
| * |
| * <p> May only be called after {@link #prepare}. Frames rendered to the Surface before |
| * {@link #start} will be discarded.</p> |
| * |
| * @throws IllegalStateException if it is called before {@link #prepare}, after |
| * {@link #stop}, or is called when VideoSource is not set to SURFACE. |
| * @see android.media.MediaRecorder.VideoSource |
| */ |
| public native Surface getSurface(); |
| |
| /** |
| * 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 { |
| |
| private AudioSource() {} |
| |
| /** @hide */ |
| public final static int AUDIO_SOURCE_INVALID = -1; |
| |
| /* Do not change these values without updating their counterparts |
| * in system/core/include/system/audio.h! |
| */ |
| |
| /** 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; |
| |
| /** |
| * Audio source for a submix of audio streams to be presented remotely. |
| * <p> |
| * An application can use this audio source to capture a mix of audio streams |
| * that should be transmitted to a remote receiver such as a Wifi display. |
| * While recording is active, these audio streams are redirected to the remote |
| * submix instead of being played on the device speaker or headset. |
| * </p><p> |
| * Certain streams are excluded from the remote submix, including |
| * {@link AudioManager#STREAM_RING}, {@link AudioManager#STREAM_ALARM}, |
| * and {@link AudioManager#STREAM_NOTIFICATION}. These streams will continue |
| * to be presented locally as usual. |
| * </p><p> |
| * Capturing the remote submix audio requires the |
| * {@link android.Manifest.permission#CAPTURE_AUDIO_OUTPUT} permission. |
| * This permission is reserved for use by system components and is not available to |
| * third-party applications. |
| * </p> |
| */ |
| public static final int REMOTE_SUBMIX = 8; |
| |
| /** |
| * Audio source for preemptible, low-priority software hotword detection |
| * It presents the same gain and pre processing tuning as {@link #VOICE_RECOGNITION}. |
| * <p> |
| * An application should use this audio source when it wishes to do |
| * always-on software hotword detection, while gracefully giving in to any other application |
| * that might want to read from the microphone. |
| * </p> |
| * This is a hidden audio source. |
| * @hide |
| */ |
| protected static final int HOTWORD = 1999; |
| } |
| |
| /** |
| * 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 |
| * <p> |
| * Using the {@link android.hardware.Camera} API as video source. |
| * </p> |
| */ |
| public static final int CAMERA = 1; |
| /** Surface video source |
| * <p> |
| * Using a Surface as video source. |
| * </p><p> |
| * This flag must be used when recording from an |
| * {@link android.hardware.camera2} API source. |
| * </p><p> |
| * When using this video source type, use {@link MediaRecorder#getSurface()} |
| * to retrieve the surface created by MediaRecorder. |
| */ |
| public static final int SURFACE = 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; |
| |
| /** VP8/VORBIS data in a WEBM container */ |
| public static final int WEBM = 9; |
| }; |
| |
| /** |
| * 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; |
| /** Ogg Vorbis audio codec */ |
| public static final int VORBIS = 6; |
| } |
| |
| /** |
| * 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; |
| public static final int VP8 = 4; |
| } |
| |
| /** |
| * 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.REMOTE_SUBMIX; |
| } |
| |
| /** |
| * 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("time-lapse-enable=1"); |
| |
| double timeBetweenFrameCapture = 1 / fps; |
| long timeBetweenFrameCaptureUs = (long) (1000000 * timeBetweenFrameCapture); |
| setParameter("time-between-time-lapse-frame-capture=" + timeBetweenFrameCaptureUs); |
| } |
| |
| /** |
| * 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(). |
| * |
| * <p>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.</p> |
| * |
| * @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) { |
| RandomAccessFile file = new RandomAccessFile(mPath, "rws"); |
| try { |
| _setOutputFile(file.getFD(), 0, 0); |
| } finally { |
| file.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(). |
| * |
| * <p>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 or mediaplayer.h! |
| */ |
| /** Unspecified media recorder error. |
| * @see android.media.MediaRecorder.OnErrorListener |
| */ |
| public static final int MEDIA_RECORDER_ERROR_UNKNOWN = 1; |
| /** Media server died. In this case, the application must release the |
| * MediaRecorder object and instantiate a new one. |
| * @see android.media.MediaRecorder.OnErrorListener |
| */ |
| public static final int MEDIA_ERROR_SERVER_DIED = 100; |
| |
| /** |
| * 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: |
| * <ul> |
| * <li>{@link #MEDIA_RECORDER_ERROR_UNKNOWN} |
| * <li>{@link #MEDIA_ERROR_SERVER_DIED} |
| * </ul> |
| * @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: |
| * <ul> |
| * <li>{@link #MEDIA_RECORDER_INFO_UNKNOWN} |
| * <li>{@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} |
| * <li>{@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} |
| * </ul> |
| * @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, |
| String clientName) throws IllegalStateException; |
| |
| private native final void native_finalize(); |
| |
| private native void setParameter(String nameValuePair); |
| |
| @Override |
| protected void finalize() { native_finalize(); } |
| } |
