/* * 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.annotation.CallbackExecutor; import android.annotation.FloatRange; import android.annotation.IntDef; import android.annotation.NonNull; import android.annotation.Nullable; import android.annotation.RequiresPermission; import android.annotation.SystemApi; import android.annotation.UnsupportedAppUsage; import android.app.ActivityThread; import android.hardware.Camera; import android.os.Build; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.os.PersistableBundle; import android.util.ArrayMap; import android.util.Log; import android.util.Pair; import android.view.Surface; import com.android.internal.annotations.GuardedBy; import com.android.internal.util.Preconditions; import java.io.File; import java.io.FileDescriptor; import java.io.IOException; import java.io.RandomAccessFile; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.List; import java.util.concurrent.Executor; /** * 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 implements AudioRouting, AudioRecordingMonitor, AudioRecordingMonitorClient, MicrophoneDirection { 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") @UnsupportedAppUsage private Surface mSurface; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private String mPath; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private FileDescriptor mFd; private File mFile; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private EventHandler mEventHandler; @UnsupportedAppUsage private OnErrorListener mOnErrorListener; @UnsupportedAppUsage private OnInfoListener mOnInfoListener; private int mChannelCount; /** * 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; } mChannelCount = 1; 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(this), packageName, ActivityThread.currentOpPackageName()); } /** * Sets a {@link android.hardware.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 {@link #prepare}.

* * @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. * *

May only be called after {@link #prepare}. Frames rendered to the Surface before * {@link #start} will be discarded.

* * @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(); /** * Configures the recorder to use a persistent surface when using SURFACE video source. *

May only be called before {@link #prepare}. If called, {@link #getSurface} should * not be used and will throw IllegalStateException. Frames rendered to the Surface * before {@link #start} will be discarded.

* @param surface a persistent input surface created by * {@link MediaCodec#createPersistentInputSurface} * @throws IllegalStateException if it is called after {@link #prepare} and before * {@link #stop}. * @throws IllegalArgumentException if the surface was not created by * {@link MediaCodec#createPersistentInputSurface}. * @see MediaCodec#createPersistentInputSurface * @see MediaRecorder.VideoSource */ public void setInputSurface(@NonNull Surface surface) { if (!(surface instanceof MediaCodec.PersistentSurface)) { throw new IllegalArgumentException("not a PersistentSurface"); } native_setInputSurface(surface); } private native final void native_setInputSurface(@NonNull Surface surface); /** * 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. * An audio source defines both a default physical source of audio signal, and a recording * configuration. These constants are for instance used * in {@link MediaRecorder#setAudioSource(int)} or * {@link AudioRecord.Builder#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/media/audio/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. *

* Capturing from VOICE_UPLINK source 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. *

*/ public static final int VOICE_UPLINK = 2; /** Voice call downlink (Rx) audio source. *

* Capturing from VOICE_DOWNLINK source 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. *

*/ public static final int VOICE_DOWNLINK = 3; /** Voice call uplink + downlink audio source *

* Capturing from VOICE_CALL source 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. *

*/ public static final int VOICE_CALL = 4; /** Microphone audio source tuned for video recording, with the same orientation * as the camera if available. */ public static final int CAMCORDER = 5; /** Microphone audio source tuned for voice recognition. */ 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. */ public static final int VOICE_COMMUNICATION = 7; /** * Audio source for a submix of audio streams to be presented remotely. *

* 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. *

* 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. *

* 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. *

*/ @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_OUTPUT) public static final int REMOTE_SUBMIX = 8; /** Microphone audio source tuned for unprocessed (raw) sound if available, behaves like * {@link #DEFAULT} otherwise. */ public static final int UNPROCESSED = 9; /** * Source for capturing audio meant to be processed in real time and played back for live * performance (e.g karaoke). *

* The capture path will minimize latency and coupling with * playback path. *

*/ public static final int VOICE_PERFORMANCE = 10; /** * Source for an echo canceller to capture the reference signal to be cancelled. *

* The echo reference signal will be captured as close as possible to the DAC in order * to include all post processing applied to the playback path. *

* Capturing the echo reference 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. *

* @hide */ @SystemApi @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_OUTPUT) public static final int ECHO_REFERENCE = 1997; /** * Audio source for capturing broadcast radio tuner output. * @hide */ @SystemApi public static final int RADIO_TUNER = 1998; /** * Audio source for preemptible, low-priority software hotword detection * It presents the same gain and pre-processing tuning as {@link #VOICE_RECOGNITION}. *

* 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. *

* This is a hidden audio source. * @hide */ @SystemApi @RequiresPermission(android.Manifest.permission.CAPTURE_AUDIO_HOTWORD) public static final int HOTWORD = 1999; } /** @hide */ @IntDef({ AudioSource.DEFAULT, AudioSource.MIC, AudioSource.VOICE_UPLINK, AudioSource.VOICE_DOWNLINK, AudioSource.VOICE_CALL, AudioSource.CAMCORDER, AudioSource.VOICE_RECOGNITION, AudioSource.VOICE_COMMUNICATION, AudioSource.UNPROCESSED, AudioSource.VOICE_PERFORMANCE, }) @Retention(RetentionPolicy.SOURCE) public @interface Source {} // TODO make AudioSource static (API change) and move this method inside the AudioSource class /** * @hide * @param source An audio source to test * @return true if the source is only visible to system components */ public static boolean isSystemOnlyAudioSource(int source) { switch(source) { case AudioSource.DEFAULT: case AudioSource.MIC: case AudioSource.VOICE_UPLINK: case AudioSource.VOICE_DOWNLINK: case AudioSource.VOICE_CALL: case AudioSource.CAMCORDER: case AudioSource.VOICE_RECOGNITION: case AudioSource.VOICE_COMMUNICATION: //case REMOTE_SUBMIX: considered "system" as it requires system permissions case AudioSource.UNPROCESSED: case AudioSource.VOICE_PERFORMANCE: return false; default: return true; } } /** @hide */ public static final String toLogFriendlyAudioSource(int source) { switch(source) { case AudioSource.DEFAULT: return "DEFAULT"; case AudioSource.MIC: return "MIC"; case AudioSource.VOICE_UPLINK: return "VOICE_UPLINK"; case AudioSource.VOICE_DOWNLINK: return "VOICE_DOWNLINK"; case AudioSource.VOICE_CALL: return "VOICE_CALL"; case AudioSource.CAMCORDER: return "CAMCORDER"; case AudioSource.VOICE_RECOGNITION: return "VOICE_RECOGNITION"; case AudioSource.VOICE_COMMUNICATION: return "VOICE_COMMUNICATION"; case AudioSource.REMOTE_SUBMIX: return "REMOTE_SUBMIX"; case AudioSource.UNPROCESSED: return "UNPROCESSED"; case AudioSource.ECHO_REFERENCE: return "ECHO_REFERENCE"; case AudioSource.VOICE_PERFORMANCE: return "VOICE_PERFORMANCE"; case AudioSource.RADIO_TUNER: return "RADIO_TUNER"; case AudioSource.HOTWORD: return "HOTWORD"; case AudioSource.AUDIO_SOURCE_INVALID: return "AUDIO_SOURCE_INVALID"; default: return "unknown source " + source; } } /** * 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 *

* Using the {@link android.hardware.Camera} API as video source. *

*/ public static final int CAMERA = 1; /** Surface video source *

* Using a Surface as video source. *

* This flag must be used when recording from an * {@link android.hardware.camera2} API source. *

* 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; /** H.264/AAC data encapsulated in MPEG2/TS */ public static final int MPEG_2_TS = 8; /** VP8/VORBIS data in a WEBM container */ public static final int WEBM = 9; /** @hide HEIC data in a HEIF container */ public static final int HEIF = 10; /** Opus data in a Ogg container */ public static final int OGG = 11; }; /** * 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 (Support is optional) */ public static final int VORBIS = 6; /** Opus audio codec */ public static final int OPUS = 7; } /** * 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; public static final int HEVC = 5; } /** * 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 audioSource the audio source to use * @throws IllegalStateException if it is called after setOutputFormat() * @see android.media.MediaRecorder.AudioSource */ public native void setAudioSource(@Source int audioSource) throws IllegalStateException; /** * Gets the maximum value for audio sources. * @see android.media.MediaRecorder.AudioSource */ public static final int getAudioSourceMax() { return AudioSource.VOICE_PERFORMANCE; } /** * 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"); setParameter("time-lapse-fps=" + fps); } /** * 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. * *

When using MPEG-4 container ({@link #setOutputFormat(int)} with * {@link OutputFormat#MPEG_4}), it is recommended to set maximum duration that fits the use * case. Setting a larger than required duration may result in a larger than needed output file * because of space reserved for MOOV box expecting large movie data in this recording session. * Unused space of MOOV box is turned into FREE box in the output file.

* * @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. * *

When using MPEG-4 container ({@link #setOutputFormat(int)} with * {@link OutputFormat#MPEG_4}), it is recommended to set maximum filesize that fits the use * case. Setting a larger than required filesize may result in a larger than needed output file * because of space reserved for MOOV box expecting large movie data in this recording session. * Unused space of MOOV box is turned into FREE box in the output file.

* * @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"); } mChannelCount = numChannels; 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); } /** * Sets the desired video encoding profile and level for recording. The profile and level * must be valid for the video encoder set by {@link #setVideoEncoder}. This method can * called before or after {@link #setVideoEncoder} but it must be called before {@link #prepare}. * {@code prepare()} may perform additional checks on the parameter to make sure that the specified * profile and level are applicable, and sometimes the passed profile or level will be * discarded due to codec capablity or to ensure the video recording can proceed smoothly * based on the capabilities of the platform.
Application can also use the * {@link MediaCodecInfo.CodecCapabilities#profileLevels} to query applicable combination of profile * and level for the corresponding format. Note that the requested profile/level may not be supported by * the codec that is actually being used by this MediaRecorder instance. * @param profile declared in {@link MediaCodecInfo.CodecProfileLevel}. * @param level declared in {@link MediaCodecInfo.CodecProfileLevel}. * @throws IllegalArgumentException when an invalid profile or level value is used. */ public void setVideoEncodingProfileLevel(int profile, int level) { if (profile <= 0) { throw new IllegalArgumentException("Video encoding profile is not positive"); } if (level <= 0) { throw new IllegalArgumentException("Video encoding level is not positive"); } setParameter("video-param-encoder-profile=" + profile); setParameter("video-param-encoder-level=" + level); } /** * 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; mFile = null; mFd = fd; } /** * Pass in the file object to be written. Call this after setOutputFormat() but before prepare(). * File should be seekable. After setting the next output file, application should not use the * file until {@link #stop}. Application is responsible for cleaning up unused files after * {@link #stop} is called. * * @param file the file object to be written into. */ public void setOutputFile(File file) { mPath = null; mFd = null; mFile = file; } /** * Sets the next output file descriptor to be used when the maximum filesize is reached * on the prior output {@link #setOutputFile} or {@link #setNextOutputFile}). File descriptor * must be seekable and writable. After setting the next output file, application should not * use the file referenced by this file descriptor until {@link #stop}. It is the application's * responsibility to close the file descriptor. It is safe to do so as soon as this call returns. * Application must call this after receiving on the * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to * that output. Application will receive{@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} * when the next output file is used. Application will not be able to set a new output file if * the previous one has not been used. Application is responsible for cleaning up unused files * after {@link #stop} is called. * * @param fd an open file descriptor to be written into. * @throws IllegalStateException if it is called before prepare(). * @throws IOException if setNextOutputFile fails otherwise. */ public void setNextOutputFile(FileDescriptor fd) throws IOException { _setNextOutputFile(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; mFile = null; mPath = path; } /** * Sets the next output file to be used when the maximum filesize is reached on the prior * output {@link #setOutputFile} or {@link #setNextOutputFile}). File should be seekable. * After setting the next output file, application should not use the file until {@link #stop}. * Application must call this after receiving on the * {@link android.media.MediaRecorder.OnInfoListener} a "what" code of * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING} and before receiving a "what" code of * {@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED}. The file is not used until switching to * that output. Application will receive {@link #MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED} * when the next output file is used. Application will not be able to set a new output file if * the previous one has not been used. Application is responsible for cleaning up unused files * after {@link #stop} is called. * * @param file The file to use. * @throws IllegalStateException if it is called before prepare(). * @throws IOException if setNextOutputFile fails otherwise. */ public void setNextOutputFile(File file) throws IOException { RandomAccessFile f = new RandomAccessFile(file, "rw"); try { _setNextOutputFile(f.getFD()); } finally { f.close(); } } // native implementation private native void _setOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; private native void _setNextOutputFile(FileDescriptor fd) throws IllegalStateException, IOException; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) 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, "rw"); try { _setOutputFile(file.getFD()); } finally { file.close(); } } else if (mFd != null) { _setOutputFile(mFd); } else if (mFile != null) { RandomAccessFile file = new RandomAccessFile(mFile, "rw"); try { _setOutputFile(file.getFD()); } finally { file.close(); } } 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() or when the camera is already in use by another app. */ 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; /** * Pauses recording. Call this after start(). You may resume recording * with resume() without reconfiguration, as opposed to stop(). It does * nothing if the recording is already paused. * * When the recording is paused and resumed, the resulting output would * be as if nothing happend during paused period, immediately switching * to the resumed scene. * * @throws IllegalStateException if it is called before start() or after * stop() */ public native void pause() throws IllegalStateException; /** * Resumes recording. Call this after start(). It does nothing if the * recording is not paused. * * @throws IllegalStateException if it is called before start() or after * stop() * @see android.media.MediaRecorder#pause */ public native void resume() 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); } @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) 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: *

{@link #MEDIA_RECORDER_ERROR_UNKNOWN} *
{@link #MEDIA_ERROR_SERVER_DIED} *

* @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 info. * @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. * Note: This event will not be sent if application already set * next output file through {@link #setNextOutputFile}. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED = 801; /** A maximum filesize had been setup and current recorded file size * has reached 90% of the limit. This is sent once per file upon * reaching/passing the 90% limit. To continue the recording, applicaiton * should use {@link #setNextOutputFile} to set the next output file. * Otherwise, recording will stop when reaching maximum file size. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING = 802; /** A maximum filesize had been reached and MediaRecorder has switched * output to a new file set by application {@link #setNextOutputFile}. * For best practice, application should use this event to keep track * of whether the file previously set has been used or not. * @see android.media.MediaRecorder.OnInfoListener */ public static final int MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED = 803; /** 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 of a callback to be invoked to communicate some * info and/or warning about the recording. */ public interface OnInfoListener { /** * Called to indicate an info or a warning during recording. * * @param mr the MediaRecorder the info pertains to * @param what the type of info or warning that has occurred *

{@link #MEDIA_RECORDER_INFO_UNKNOWN} *
{@link #MEDIA_RECORDER_INFO_MAX_DURATION_REACHED} *
{@link #MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED} *

* @param extra an extra code, specific to the info 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; private static final int MEDIA_RECORDER_AUDIO_ROUTING_CHANGED = 10000; @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; case MEDIA_RECORDER_AUDIO_ROUTING_CHANGED: AudioManager.resetAudioPortGeneration(); synchronized (mRoutingChangeListeners) { for (NativeRoutingEventHandlerDelegate delegate : mRoutingChangeListeners.values()) { delegate.notifyClient(); } } return; default: Log.e(TAG, "Unknown message type " + msg.what); return; } } } //-------------------------------------------------------------------------- // Explicit Routing //-------------------- private AudioDeviceInfo mPreferredDevice = null; /** * Specifies an audio device (via an {@link AudioDeviceInfo} object) to route * the input from this MediaRecorder. * @param deviceInfo The {@link AudioDeviceInfo} specifying the audio source. * If deviceInfo is null, default routing is restored. * @return true if succesful, false if the specified {@link AudioDeviceInfo} is non-null and * does not correspond to a valid audio input device. */ @Override public boolean setPreferredDevice(AudioDeviceInfo deviceInfo) { if (deviceInfo != null && !deviceInfo.isSource()) { return false; } int preferredDeviceId = deviceInfo != null ? deviceInfo.getId() : 0; boolean status = native_setInputDevice(preferredDeviceId); if (status == true) { synchronized (this) { mPreferredDevice = deviceInfo; } } return status; } /** * Returns the selected input device specified by {@link #setPreferredDevice}. Note that this * is not guaranteed to correspond to the actual device being used for recording. */ @Override public AudioDeviceInfo getPreferredDevice() { synchronized (this) { return mPreferredDevice; } } /** * Returns an {@link AudioDeviceInfo} identifying the current routing of this MediaRecorder * Note: The query is only valid if the MediaRecorder is currently recording. * If the recorder is not recording, the returned device can be null or correspond to previously * selected device when the recorder was last active. */ @Override public AudioDeviceInfo getRoutedDevice() { int deviceId = native_getRoutedDeviceId(); if (deviceId == 0) { return null; } AudioDeviceInfo[] devices = AudioManager.getDevicesStatic(AudioManager.GET_DEVICES_INPUTS); for (int i = 0; i < devices.length; i++) { if (devices[i].getId() == deviceId) { return devices[i]; } } return null; } /* * Call BEFORE adding a routing callback handler or AFTER removing a routing callback handler. */ @GuardedBy("mRoutingChangeListeners") private void enableNativeRoutingCallbacksLocked(boolean enabled) { if (mRoutingChangeListeners.size() == 0) { native_enableDeviceCallback(enabled); } } /** * The list of AudioRouting.OnRoutingChangedListener interfaces added (with * {@link #addOnRoutingChangedListener(android.media.AudioRouting.OnRoutingChangedListener, Handler)} * by an app to receive (re)routing notifications. */ @GuardedBy("mRoutingChangeListeners") private ArrayMap mRoutingChangeListeners = new ArrayMap<>(); /** * Adds an {@link AudioRouting.OnRoutingChangedListener} to receive notifications of routing * changes on this MediaRecorder. * @param listener The {@link AudioRouting.OnRoutingChangedListener} interface to receive * notifications of rerouting events. * @param handler Specifies the {@link Handler} object for the thread on which to execute * the callback. If null, the handler on the main looper will be used. */ @Override public void addOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener, Handler handler) { synchronized (mRoutingChangeListeners) { if (listener != null && !mRoutingChangeListeners.containsKey(listener)) { enableNativeRoutingCallbacksLocked(true); mRoutingChangeListeners.put( listener, new NativeRoutingEventHandlerDelegate(this, listener, handler != null ? handler : mEventHandler)); } } } /** * Removes an {@link AudioRouting.OnRoutingChangedListener} which has been previously added * to receive rerouting notifications. * @param listener The previously added {@link AudioRouting.OnRoutingChangedListener} interface * to remove. */ @Override public void removeOnRoutingChangedListener(AudioRouting.OnRoutingChangedListener listener) { synchronized (mRoutingChangeListeners) { if (mRoutingChangeListeners.containsKey(listener)) { mRoutingChangeListeners.remove(listener); enableNativeRoutingCallbacksLocked(false); } } } private native final boolean native_setInputDevice(int deviceId); private native final int native_getRoutedDeviceId(); private native final void native_enableDeviceCallback(boolean enabled); //-------------------------------------------------------------------------- // Microphone information //-------------------- /** * Return A lists of {@link MicrophoneInfo} representing the active microphones. * By querying channel mapping for each active microphone, developer can know how * the microphone is used by each channels or a capture stream. * * @return a lists of {@link MicrophoneInfo} representing the active microphones * @throws IOException if an error occurs */ public List getActiveMicrophones() throws IOException { ArrayList activeMicrophones = new ArrayList<>(); int status = native_getActiveMicrophones(activeMicrophones); if (status != AudioManager.SUCCESS) { if (status != AudioManager.ERROR_INVALID_OPERATION) { Log.e(TAG, "getActiveMicrophones failed:" + status); } Log.i(TAG, "getActiveMicrophones failed, fallback on routed device info"); } AudioManager.setPortIdForMicrophones(activeMicrophones); // Use routed device when there is not information returned by hal. if (activeMicrophones.size() == 0) { AudioDeviceInfo device = getRoutedDevice(); if (device != null) { MicrophoneInfo microphone = AudioManager.microphoneInfoFromAudioDeviceInfo(device); ArrayList> channelMapping = new ArrayList<>(); for (int i = 0; i < mChannelCount; i++) { channelMapping.add(new Pair(i, MicrophoneInfo.CHANNEL_MAPPING_DIRECT)); } microphone.setChannelMapping(channelMapping); activeMicrophones.add(microphone); } } return activeMicrophones; } private native final int native_getActiveMicrophones( ArrayList activeMicrophones); //-------------------------------------------------------------------------- // MicrophoneDirection //-------------------- /** * Specifies the logical microphone (for processing). * * @param direction Direction constant. * @return true if sucessful. */ public boolean setPreferredMicrophoneDirection(@DirectionMode int direction) { return native_setPreferredMicrophoneDirection(direction) == 0; } /** * Specifies the zoom factor (i.e. the field dimension) for the selected microphone * (for processing). The selected microphone is determined by the use-case for the stream. * * @param zoom the desired field dimension of microphone capture. Range is from -1 (wide angle), * though 0 (no zoom) to 1 (maximum zoom). * @return true if sucessful. */ public boolean setPreferredMicrophoneFieldDimension( @FloatRange(from = -1.0, to = 1.0) float zoom) { Preconditions.checkArgument( zoom >= -1 && zoom <= 1, "Argument must fall between -1 & 1 (inclusive)"); return native_setPreferredMicrophoneFieldDimension(zoom) == 0; } private native int native_setPreferredMicrophoneDirection(int direction); private native int native_setPreferredMicrophoneFieldDimension(float zoom); //-------------------------------------------------------------------------- // Implementation of AudioRecordingMonitor interface //-------------------- AudioRecordingMonitorImpl mRecordingInfoImpl = new AudioRecordingMonitorImpl((AudioRecordingMonitorClient) this); /** * Register a callback to be notified of audio capture changes via a * {@link AudioManager.AudioRecordingCallback}. A callback is received when the capture path * configuration changes (pre-processing, format, sampling rate...) or capture is * silenced/unsilenced by the system. * @param executor {@link Executor} to handle the callbacks. * @param cb non-null callback to register */ public void registerAudioRecordingCallback(@NonNull @CallbackExecutor Executor executor, @NonNull AudioManager.AudioRecordingCallback cb) { mRecordingInfoImpl.registerAudioRecordingCallback(executor, cb); } /** * Unregister an audio recording callback previously registered with * {@link #registerAudioRecordingCallback(Executor, AudioManager.AudioRecordingCallback)}. * @param cb non-null callback to unregister */ public void unregisterAudioRecordingCallback(@NonNull AudioManager.AudioRecordingCallback cb) { mRecordingInfoImpl.unregisterAudioRecordingCallback(cb); } /** * Returns the current active audio recording for this audio recorder. * @return a valid {@link AudioRecordingConfiguration} if this recorder is active * or null otherwise. * @see AudioRecordingConfiguration */ public @Nullable AudioRecordingConfiguration getActiveRecordingConfiguration() { return mRecordingInfoImpl.getActiveRecordingConfiguration(); } //--------------------------------------------------------- // Implementation of AudioRecordingMonitorClient interface //-------------------- /** * @hide */ public int getPortId() { return native_getPortId(); } private native int native_getPortId(); /** * 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(); @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private static native final void native_init(); @UnsupportedAppUsage private native final void native_setup(Object mediarecorder_this, String clientName, String opPackageName) throws IllegalStateException; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private native final void native_finalize(); @UnsupportedAppUsage private native void setParameter(String nameValuePair); /** * Return Metrics data about the current Mediarecorder instance. * * @return a {@link PersistableBundle} containing the set of attributes and values * available for the media being generated by this instance of * MediaRecorder. * The attributes are descibed in {@link MetricsConstants}. * * Additional vendor-specific fields may also be present in * the return value. */ public PersistableBundle getMetrics() { PersistableBundle bundle = native_getMetrics(); return bundle; } private native PersistableBundle native_getMetrics(); @Override protected void finalize() { native_finalize(); } public final static class MetricsConstants { private MetricsConstants() {} /** * Key to extract the audio bitrate * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String AUDIO_BITRATE = "android.media.mediarecorder.audio-bitrate"; /** * Key to extract the number of audio channels * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String AUDIO_CHANNELS = "android.media.mediarecorder.audio-channels"; /** * Key to extract the audio samplerate * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String AUDIO_SAMPLERATE = "android.media.mediarecorder.audio-samplerate"; /** * Key to extract the audio timescale * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String AUDIO_TIMESCALE = "android.media.mediarecorder.audio-timescale"; /** * Key to extract the video capture frame rate * from the {@link MediaRecorder#getMetrics} return. * The value is a double. */ public static final String CAPTURE_FPS = "android.media.mediarecorder.capture-fps"; /** * Key to extract the video capture framerate enable value * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String CAPTURE_FPS_ENABLE = "android.media.mediarecorder.capture-fpsenable"; /** * Key to extract the intended playback frame rate * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String FRAMERATE = "android.media.mediarecorder.frame-rate"; /** * Key to extract the height (in pixels) of the captured video * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String HEIGHT = "android.media.mediarecorder.height"; /** * Key to extract the recorded movies time units * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. * A value of 1000 indicates that the movie's timing is in milliseconds. */ public static final String MOVIE_TIMESCALE = "android.media.mediarecorder.movie-timescale"; /** * Key to extract the rotation (in degrees) to properly orient the video * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String ROTATION = "android.media.mediarecorder.rotation"; /** * Key to extract the video bitrate from being used * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String VIDEO_BITRATE = "android.media.mediarecorder.video-bitrate"; /** * Key to extract the value for how often video iframes are generated * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String VIDEO_IFRAME_INTERVAL = "android.media.mediarecorder.video-iframe-interval"; /** * Key to extract the video encoding level * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String VIDEO_LEVEL = "android.media.mediarecorder.video-encoder-level"; /** * Key to extract the video encoding profile * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String VIDEO_PROFILE = "android.media.mediarecorder.video-encoder-profile"; /** * Key to extract the recorded video time units * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. * A value of 1000 indicates that the video's timing is in milliseconds. */ public static final String VIDEO_TIMESCALE = "android.media.mediarecorder.video-timescale"; /** * Key to extract the width (in pixels) of the captured video * from the {@link MediaRecorder#getMetrics} return. * The value is an integer. */ public static final String WIDTH = "android.media.mediarecorder.width"; } }

audiorecorder