No there is no way to play a segment of a media file.
On Dec 19, 9:52 am, Kenneth Loafman <kenneth.loaf...@gmail.com> wrote:
> Is there a way to set the length of the segment to play like
> setDataSource() has? I'm not seeing it.
>
> ...Thanks,
> ...Ken
>
> On Fri, 19 Dec 2008 09:03:30 -0800 (PST), Dave Sparks
>
> <davidspa...@android.com> wrote:
>
> >setDataSource() with offset is for playing an embedded media file. In
> >other words, there must be a valid WAVE header at the specified
> >offset. An example use case is a resource file that contains many WAVE
> >files with a table of contents at the beginning.
>
> >You can call seekTo() to start playback at time offset.
>
> >On Dec 19, 8:28 am, Kenneth Loafman <kenneth.loaf...@gmail.com> wrote:
> >> This code segment:
>
> >> > path = "/data/noise.wav";
> >> > file = new File(path);
>
> >> > tx.setText("Prepping audio...");
> >> > Log.i(TAG, "Prepping audio");
>
> >> > for (int i = 0; i < nPlay; ++i) {
> >> > myPlayers[i] = new MediaPlayer();
> >> > randFile[i] = new RandomAccessFile(file, "r");
> >> > myPlayers[i].setAudioStreamType(AudioManager.STREAM_MUSIC);
> >> > myPlayers[i].setDataSource(randFile[i].getFD(),
> >> > i * segSize,
> >> > segSize);
> >> > Log.i(TAG, "Prepping: " + i);
> >> > myPlayers[i].prepare();
> >> > }
>
> >> produces this log:
>
> >> >12-19 10:05:38.369: INFO/SilentSpeech(3427): Prepping audio
> >> >12-19 10:05:38.409: INFO/SilentSpeech(3427): Prepping: 0
> >> >12-19 10:05:38.449: INFO/SilentSpeech(3427): Prepping: 1
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): error: Prepare failed.:
> >> >status=0xFFFFFFFC
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): java.io.IOException:
> >> >Prepare failed.: status=0xFFFFFFFC
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.media.MediaPlayer.prepare(Native Method)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >com.android.silentspeech.SSActivity.playAudio(SSActivity.java:55)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >com.android.silentspeech.SSActivity.onCreate(SSActivity.java:38)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1122)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2103)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2156)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.ActivityThread.access$1800(ActivityThread.java:112)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.ActivityThread$H.handleMessage(ActivityThread.java:1580)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.os.Handler.dispatchMessage(Handler.java:88)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.os.Looper.loop(Looper.java:123)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >android.app.ActivityThread.main(ActivityThread.java:3742)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >java.lang.reflect.Method.invokeNative(Native Method)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >java.lang.reflect.Method.invoke(Method.java:515)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497)
> >> >12-19 10:05:38.469: ERROR/SilentSpeech(3427): at
> >> >dalvik.system.NativeStart.main(Native Method)
>
> >> If I replace "i * segSize" with "0" to always start at the front, it
> >> works. Strange.
>
> >> Does this mean that:
> >> 1) setDataSource() does not work with offset? -or-
> >> 2) do I need to put a file header at each offset?
>
> >> If the answer is 2, is there an option to take raw input?
>
> >> ...Thanks,
> >> ...Ken
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