Bug 918

It is possible to reproduce this bug using the MovieSimple test by simply passing -vid -2 and produces no audio output for audio only playback.

passing -vid -1 work and produce audio output for audio only playback.

-2 == GLMediaPlayer.STREAM_ID_NONE == OFF
-1 == AUTO

Reproducer:
java -cp jogamp-all-platforms/jar/jogl-test.jar:jogamp-all-platforms/jar/gluegen-rt.jar:jogamp-all-platforms/jar/jogl-all.jar:jogamp-all-platforms/jar/joal.jar com.jogamp.opengl.test.junit.jogl.demos.es2.av.MovieSimple -vid -2

Main issue:
StreamWorker did not get created and started for -vid -2 
inside src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
textureCount = 0; for -vid -2

StreamWorker is responsible for decoding both audio and video in a separate thread.

TODO: review StreamWorker for -vid -2
TODO: review StreamWorker, GLMediaPlayer and FFMPEGMediaPlayer when to stop using an audio only stream. The current implementation decide to stop when it encounter an end of stream _video_ frame.

Suggested fix:

diff --git a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java b/src
index 86e19c9..7bc61b7 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
@@ -528,7 +528,7 @@ public abstract class GLMediaPlayerImpl implements GLMediaPl
             this.vid = vid;
             this.aid = aid;
             if ( this.streamLoc != null ) {
-                if( TEXTURE_COUNT_MIN < textureCount ) {
+                if( streamWorker == null ) {
                     streamWorker = new StreamWorker();
                 } else {
                     new Thread() {

    Bug 918 (1/2): Use StreamWorker in 'Audio Only' mode, since no 'getNextTexture(..)' is issued here!
    
    Thanks to Xerxes to analyze this issue thoroughly.
    
    TODO: Implement EOS for 'Audio Only' and test seek, pause, etc .. - Apply manual tests in MovieSimple

a1be0f69bacb315e40a017b8997ef1c610da576e
    GLMediaPlayer: Fix Deadlock if EOS happens after pause/resume (seek) - 
   Tested w/ seeking 'Audio Only' and Matroska
    
    Test stream was default of MovieSimple:
      http://video.webmfiles.org/big-buck-bunny_trailer.webm
    
    while disabling video (-vid -2)

8a8ed735f6631b2da7bf605c5c3dda4e0fc13905
    Determine StreamWorker usage after init
      - To support audio only files, we need to determine to use StreamWorker
        after completion of stream-init.
    
    Fix seek(..)
      - FFMPeg: pos0 needs to use aPTS for audio-only
      - Clip target time [0..duration[
    
    Fallback for EOS Detection
      In case the backend does not report proper EOS:
    
      - Utilize 'nullFramesCount >= MAX' -> EOS,
        where MAX is number of frames for 3s play duraction
        and where 'nullFramesCount' is increased if no valid packet is available
        and no decoded-video or -audio in the queue.
    
      - Utilize pts > duration -> EOS
    
    MovieSimple uses full GLEventListener for 'Audio Only' as well to test seek
      - Matroska seek for audio-only leads to EOS ..
        http://video.webmfiles.org/big-buck-bunny_trailer.webm
    
      - MP4 audio-only seek works
        http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4
    
    MovieSimple/MovieCube:
      - Use audio-pts in audio-only to calc target time
    
    Tested:
      - A, V and A+V
      - Pause, Stop and Seek
      - GNU/Linux

d42b236ef139dcc8d8713535893c7870b55d420c
    ALAudioSink: Fix stop and flush of OpenAL source
    
    - stopImpl() shall always issue alSourceStop(..) if state is not STOPPED
    - Remove 'flush' hint for dequeueBuffer(..), we perform proper flush in respective method, see below
    - flush() needs to issue:
       - stopImpl() - which should already dequeue all buffers
       - Explicitly dequeue all buffers: via 'alSourcei(alSource[0], AL.AL_BUFFER, 0)'
       - Then dequeue manually processed buffers: dequeueBuffer( false /* wait */ );
       - And dequeue _all_ buffers: dequeueForceAll();


a0b23035bf9de987f5ad1b00fe3630c102f4e513
    Fix EOS Regression: Only use pts>duration for EOS if duration > 0 
   (camera or other sources may not have duration)
    
    Regression of commit 8a8ed735f6631b2da7bf605c5c3dda4e0fc13905

Tested on Android as well ..