As of the latest released version of Android ( CupCake ), the API contains an class called AudioTrack(). This class allows users to stream local buffered PCM audio directly to the audio hardware. In previous releases stream output was only available while reading from a FILE or a URL.

Here is an example of playing a PCM file. You can find the yes_08k.pcm file in the Android sources in /external/srec/tests/pcm

public void onCreate(Bundle savedInstanceState) {
    byte[] byteData;
    super.onCreate(savedInstanceState);

    try {
        // Open the file and load the entire file into a byte array
        File oFile = new File( "/sdcard/yes_08k.pcm");
        byteData = new byte[(int) oFile.length()];
        FileInputStream in = new FileInputStream( oFile );
        in.read( byteData );
        in.close(); 

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    catch (IOException e) {
        e.printStackTrace();
    }

    int intSize = android.media.AudioTrack.getMinBufferSize(8000,
                                                            AudioFormat.CHANNEL_CONFIGURATION_MONO,
                                                            AudioFormat.ENCODING_PCM_16BIT);

    AudioTrack oTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 8000,
                                       AudioFormat.CHANNEL_CONFIGURATION_MONO,
                                       AudioFormat.ENCODING_PCM_16BIT, intSize,
                                       AudioTrack.MODE_STREAM);

    // Start playing data that is written
    oTrack.play();

    // Write the byte array to the track
    oTrack.write(byteData, 0, byteData.length);

    // Done writting to the track
    oTrack.stop();
}

If you have a WAV file and your not sure of the Hz or Bit rate use the ‘file‘ UNIX command. Most WAV files are just PCM with a small header and should also work with the above example with a small bit of sound corruption at the beginning as the WAV header is read in as PCM data.

$ file yes.wav
yes.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz

I hope this encourages people! We will have sound on Android CupCake!

]]> http://www.supergnes.com/blog/?feed=rss2&p=211 http://www.supergnes.com/blog/?p=202 http://www.supergnes.com/blog/?p=202#comments Thu, 20 May 2010 06:40:39 +0000 admin http://www.supergnes.com/blog/?p=202 SuperGNES Lite has been released to Android Market! It’s time (if you haven’t already) to give this SNES emulator a spin! The only differences between the full version and lite is save state support and multiple cheat codes. All the other features are available free of charge! Please give it a try and give us your feedback. Thanks!

SuperGNES Lite

Here is the full list of titles that are now playable with SA-1 support.

• Super Mario RPG: Legend of the Seven Stars
• Kirby Super Star
• Kirby’s Dream Land 3
• Super Bomberman Panic Bomber World
• SD Gundam G NEXT
• Dragon Ball Z: Hyper Dimension
• Daisenryaku Expert WWII: War in Europe
• Derby Jockey 2
• SD F-1 Grand Prix
• Itoi Shigesato no Bass Tsuri No. 1
• J. League ‘96 Dream Stadium
• Jikkyou Oshaberi Parodius
• Jumpin’ Derby
• Kakinoki Shogi
• Marvelous: Mouhitotsu no Takarajima
• Masters New: Haruka Naru Augusta 3
• PGA Tour ‘96
• Super Robot Taisen Gaiden: Masō Kishin - The Lord Of Elemental
• Mini 4WD Shining Scorpion Let’s & Go!!
• Pebble Beach no Hotou: New Tournament Edition
• PGA European Tour
• Power Rangers Zeo: Battle Racers
• Shin Shogi Club
• Shogi Saikyou
• Shogi Saikyou 2

Dedicated to the gamers,
Nate SuperGNES Dev

After working hard to development on screen controls we finally found a control configuration that is easy to use and allows for precise game control. The newest screen only phones have been in desperate need of better controls as most games have been modeled around the hard keyboard. What we have created is a controller pad using on screen buttons, combined with the track ball or D-Pad for directional controls. For the track ball you simply scroll in the direction you want to go, press the ball in to continue your path of travel and release it to stop. When you want to super speed and jump hold the speed button down and then slide your thumb down to the jump button to press both buttons at the same time. Theses controls have proven to be quite effective in kicking some koopa shell and we hope to add some more controller skins in the future. Checkout the in-game screen shot using the new touch controls.

• CPU and APU Cores
• Keyboard Controls
• Game Scanner with cover art
• DSP1-4
• Sound. It’s really slow right now but everything is rendering correct.

Here is what isn’t working yet or not available.

• SA1, SuperFX, C4
• Screen Controls (just ran out of time on this one)
• Certain games are crashing an exhibit graphical glitches

And here is what will not be enabled for the beta.

• Save State (Well technically you can save but just you can’t load)
• Save / Load SRAM or battery backup

We are working on a release candidate right now and will email everyone today as soon as we get it together.