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# org.apache.cordova.media

This plugin provides the ability to record and play back audio files on a device.

__NOTE__: The current implementation does not adhere to a W3C
specification for media capture, and is provided for convenience only.
A future implementation will adhere to the latest W3C specification
and may deprecate the current APIs.

This plugin defines a global `Media` Constructor.

Although in the global scope, it is not available until after the `deviceready` event.

    document.addEventListener("deviceready", onDeviceReady, false);
    function onDeviceReady() {
        console.log(Media);
    }

## Installation

    cordova plugin add org.apache.cordova.media

## Supported Platforms

- Android
- BlackBerry 10
- iOS
- Windows Phone 7 and 8
- Tizen
- Windows 8

## Windows Phone Quirks

- Only one media file can be played back at a time.

- There are strict restrictions on how your application interacts with other media. See the [Microsoft documentation for details][url].

[url]: http://msdn.microsoft.com/en-us/library/windowsphone/develop/hh184838(v=vs.92).aspx

## Media

    var media = new Media(src, mediaSuccess, [mediaError], [mediaStatus]);

### Parameters

- __src__: A URI containing the audio content. _(DOMString)_

- __mediaSuccess__: (Optional) The callback that executes after a `Media` object has completed the current play, record, or stop action. _(Function)_

- __mediaError__: (Optional) The callback that executes if an error occurs. _(Function)_

- __mediaStatus__: (Optional) The callback that executes to indicate status changes. _(Function)_

### Constants

The following constants are reported as the only parameter to the
`mediaStatus` callback:

- `Media.MEDIA_NONE`     = 0;
- `Media.MEDIA_STARTING` = 1;
- `Media.MEDIA_RUNNING`  = 2;
- `Media.MEDIA_PAUSED`   = 3;
- `Media.MEDIA_STOPPED`  = 4;

### Methods

- `media.getCurrentPosition`: Returns the current position within an audio file.

- `media.getDuration`: Returns the duration of an audio file.

- `media.play`: Start or resume playing an audio file.

- `media.pause`: Pause playback of an audio file.

- `media.release`: Releases the underlying operating system's audio resources.

- `media.seekTo`: Moves the position within the audio file.

- `media.setVolume`: Set the volume for audio playback.

- `media.startRecord`: Start recording an audio file.

- `media.stopRecord`: Stop recording an audio file.

- `media.stop`: Stop playing an audio file.

### Additional ReadOnly Parameters

- __position__: The position within the audio playback, in seconds.
    - Not automatically updated during play; call `getCurrentPosition` to update.

- __duration__: The duration of the media, in seconds.


## media.getCurrentPosition

Returns the current position within an audio file.  Also updates the `Media` object's `position` parameter.

    media.getCurrentPosition(mediaSuccess, [mediaError]);

### Parameters

- __mediaSuccess__: The callback that is passed the current position in seconds.

- __mediaError__: (Optional) The callback to execute if an error occurs.

### Quick Example

    // Audio player
    //
    var my_media = new Media(src, onSuccess, onError);

    // Update media position every second
    var mediaTimer = setInterval(function () {
        // get media position
        my_media.getCurrentPosition(
            // success callback
            function (position) {
                if (position > -1) {
                    console.log((position) + " sec");
                }
            },
            // error callback
            function (e) {
                console.log("Error getting pos=" + e);
            }
        );
    }, 1000);


## media.getDuration

Returns the duration of an audio file in seconds. If the duration is unknown, it returns a value of -1.


    media.getDuration();

### Quick Example

    // Audio player
    //
    var my_media = new Media(src, onSuccess, onError);

    // Get duration
    var counter = 0;
    var timerDur = setInterval(function() {
        counter = counter + 100;
        if (counter > 2000) {
            clearInterval(timerDur);
        }
        var dur = my_media.getDuration();
        if (dur > 0) {
            clearInterval(timerDur);
            document.getElementById('audio_duration').innerHTML = (dur) + " sec";
        }
    }, 100);


## media.pause

Pauses playing an audio file.

    media.pause();


### Quick Example

    // Play audio
    //
    function playAudio(url) {
        // Play the audio file at url
        var my_media = new Media(url,
            // success callback
            function () { console.log("playAudio():Audio Success"); },
            // error callback
            function (err) { console.log("playAudio():Audio Error: " + err); }
        );

        // Play audio
        my_media.play();

        // Pause after 10 seconds
        setTimeout(function () {
            media.pause();
        }, 10000);
    }


## media.play

Starts or resumes playing an audio file.

    media.play();


### Quick Example

    // Play audio
    //
    function playAudio(url) {
        // Play the audio file at url
        var my_media = new Media(url,
            // success callback
            function () {
                console.log("playAudio():Audio Success");
            },
            // error callback
            function (err) {
                console.log("playAudio():Audio Error: " + err);
            }
        );
        // Play audio
        my_media.play();
    }


### iOS Quirks

- __numberOfLoops__: Pass this option to the `play` method to specify
  the number of times you want the media file to play, e.g.:

        var myMedia = new Media("http://audio.ibeat.org/content/p1rj1s/p1rj1s_-_rockGuitar.mp3")
        myMedia.play({ numberOfLoops: 2 })

- __playAudioWhenScreenIsLocked__: Pass in this option to the `play`
  method to specify whether you want to allow playback when the screen
  is locked.  If set to `true` (the default value), the state of the
  hardware mute button is ignored, e.g.:

        var myMedia = new Media("http://audio.ibeat.org/content/p1rj1s/p1rj1s_-_rockGuitar.mp3")
        myMedia.play({ playAudioWhenScreenIsLocked : false })

- __order of file search__: When only a file name or simple path is
  provided, iOS searches in the `www` directory for the file, then in
  the application's `documents/tmp` directory:

        var myMedia = new Media("audio/beer.mp3")
        myMedia.play()  // first looks for file in www/audio/beer.mp3 then in <application>/documents/tmp/audio/beer.mp3

## media.release

Releases the underlying operating system's audio resources.
This is particularly important for Android, since there are a finite amount of
OpenCore instances for media playback. Applications should call the `release`
function for any `Media` resource that is no longer needed.

    media.release();


### Quick Example

    // Audio player
    //
    var my_media = new Media(src, onSuccess, onError);

    my_media.play();
    my_media.stop();
    my_media.release();


## media.seekTo

Sets the current position within an audio file.

    media.seekTo(milliseconds);

### Parameters

- __milliseconds__: The position to set the playback position within the audio, in milliseconds.


### Quick Example

    // Audio player
    //
    var my_media = new Media(src, onSuccess, onError);
        my_media.play();
    // SeekTo to 10 seconds after 5 seconds
    setTimeout(function() {
        my_media.seekTo(10000);
    }, 5000);


### BlackBerry 10 Quirks

- Not supported on BlackBerry OS 5 devices.

## media.setVolume

Set the volume for an audio file.

    media.setVolume(volume);

### Parameters

- __volume__: The volume to set for playback.  The value must be within the range of 0.0 to 1.0.

### Supported Platforms

- Android
- iOS

### Quick Example

    // Play audio
    //
    function playAudio(url) {
        // Play the audio file at url
        var my_media = new Media(url,
            // success callback
            function() {
                console.log("playAudio():Audio Success");
            },
            // error callback
            function(err) {
                console.log("playAudio():Audio Error: "+err);
        });

        // Play audio
        my_media.play();

        // Mute volume after 2 seconds
        setTimeout(function() {
            my_media.setVolume('0.0');
        }, 2000);

        // Set volume to 1.0 after 5 seconds
        setTimeout(function() {
            my_media.setVolume('1.0');
        }, 5000);
    }


## media.startRecord

Starts recording an audio file.

    media.startRecord();

### Supported Platforms

- Android
- iOS
- Windows Phone 7 and 8
- Windows 8

### Quick Example

    // Record audio
    //
    function recordAudio() {
        var src = "myrecording.mp3";
        var mediaRec = new Media(src,
            // success callback
            function() {
                console.log("recordAudio():Audio Success");
            },

            // error callback
            function(err) {
                console.log("recordAudio():Audio Error: "+ err.code);
            });

        // Record audio
        mediaRec.startRecord();
    }


### Android Quirks

- Android devices record audio in Adaptive Multi-Rate format. The specified file should end with a _.amr_ extension.
- The hardware volume controls are wired up to the media volume while any Media objects are alive. Once the last created Media object has `release()` called on it, the volume controls revert to their default behaviour. The controls are also reset on page navigation, as this releases all Media objects.

### iOS Quirks

- iOS only records to files of type _.wav_ and returns an error if the file name extension is not correct.

- If a full path is not provided, the recording is placed in the application's `documents/tmp` directory. This can be accessed via the `File` API using `LocalFileSystem.TEMPORARY`. Any subdirectory specified at record time must already exist.

- Files can be recorded and played back using the documents URI:

        var myMedia = new Media("documents://beer.mp3")

### Windows 8 Quirks

- If a full path is not provided, the recording is placed in the AppData/temp directory. This can be accessed via the `File` API using `LocalFileSystem.TEMPORARY` or 'ms-appdata:///temp/<filename>' URI.

- Any subdirectory specified at record time must already exist.

### Tizen Quirks

- Not supported on Tizen devices.

## media.stop

Stops playing an audio file.

    media.stop();

### Quick Example

    // Play audio
    //
    function playAudio(url) {
        // Play the audio file at url
        var my_media = new Media(url,
            // success callback
            function() {
                console.log("playAudio():Audio Success");
            },
            // error callback
            function(err) {
                console.log("playAudio():Audio Error: "+err);
            }
        );

        // Play audio
        my_media.play();

        // Pause after 10 seconds
        setTimeout(function() {
            my_media.stop();
        }, 10000);
    }


## media.stopRecord

Stops recording an audio file.

    media.stopRecord();

### Supported Platforms

- Android
- iOS
- Windows Phone 7 and 8
- Windows 8

### Quick Example

    // Record audio
    //
    function recordAudio() {
        var src = "myrecording.mp3";
        var mediaRec = new Media(src,
            // success callback
            function() {
                console.log("recordAudio():Audio Success");
            },

            // error callback
            function(err) {
                console.log("recordAudio():Audio Error: "+ err.code);
            }
        );

        // Record audio
        mediaRec.startRecord();

        // Stop recording after 10 seconds
        setTimeout(function() {
            mediaRec.stopRecord();
        }, 10000);
    }


### Tizen Quirks

- Not supported on Tizen devices.

## MediaError

A `MediaError` object is returned to the `mediaError` callback
function when an error occurs.

### Properties

- __code__: One of the predefined error codes listed below.

- __message__: An error message describing the details of the error.

### Constants

- `MediaError.MEDIA_ERR_ABORTED`        = 1
- `MediaError.MEDIA_ERR_NETWORK`        = 2
- `MediaError.MEDIA_ERR_DECODE`         = 3
- `MediaError.MEDIA_ERR_NONE_SUPPORTED` = 4