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Non-functional MP3 playing support.

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git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@152 ed5b42cb-e716-0410-a449-f6a68f950b19
This commit is contained in:
Michael Bayne
2007-02-08 19:04:59 +00:00
parent 15a4d1d075
commit ea9f4d481e
3 changed files with 223 additions and 55 deletions
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src/java/com/threerings/openal/Stream.java
+48 -55
View File
@@ -35,16 +35,14 @@ import org.lwjgl.openal.AL10;
public abstract class Stream
{
/**
* Creates a new stream. Call {@link #dispose} when finished with the
* stream.
* Creates a new stream. Call {@link #dispose} when finished with the stream.
*
* @param soundmgr a reference to the sound manager that will update the
* stream
* @param soundmgr a reference to the sound manager that will update the stream
*/
public Stream (SoundManager soundmgr)
{
_soundmgr = soundmgr;
// create the source and buffers
_nbuf = BufferUtils.createIntBuffer(NUM_BUFFERS);
_nbuf.limit(1);
@@ -53,11 +51,11 @@ public abstract class Stream
_nbuf.clear();
AL10.alGenBuffers(_nbuf);
_nbuf.get(_bufferIds);
// register with sound manager
_soundmgr.addStream(this);
}
/**
* Sets the base gain of the stream.
*/
@@ -68,7 +66,7 @@ public abstract class Stream
AL10.alSourcef(_sourceId, AL10.AL_GAIN, _gain);
}
}
/**
* Sets the pitch of the stream.
*/
@@ -77,7 +75,7 @@ public abstract class Stream
_pitch = pitch;
AL10.alSourcef(_sourceId, AL10.AL_PITCH, _pitch);
}
/**
* Determines whether this stream is currently playing.
*/
@@ -85,7 +83,7 @@ public abstract class Stream
{
return _state == AL10.AL_PLAYING;
}
/**
* Starts playing this stream.
*/
@@ -102,7 +100,7 @@ public abstract class Stream
AL10.alSourcePlay(_sourceId);
_state = AL10.AL_PLAYING;
}
/**
* Pauses this stream.
*/
@@ -115,7 +113,7 @@ public abstract class Stream
AL10.alSourcePause(_sourceId);
_state = AL10.AL_PAUSED;
}
/**
* Stops this stream.
*/
@@ -128,10 +126,10 @@ public abstract class Stream
AL10.alSourceStop(_sourceId);
_state = AL10.AL_STOPPED;
}
/**
* Fades this stream in over the specified interval. If the stream isn't
* playing, it will be started.
* Fades this stream in over the specified interval. If the stream isn't playing, it will be
* started.
*/
public void fadeIn (float interval)
{
@@ -143,7 +141,7 @@ public abstract class Stream
_fadeInterval = interval;
_fadeElapsed = 0f;
}
/**
* Fades this stream out over the specified interval.
*
@@ -155,10 +153,9 @@ public abstract class Stream
_fadeInterval = interval;
_fadeElapsed = 0f;
}
/**
* Releases the resources held by this stream and removes it from
* the manager.
* Releases the resources held by this stream and removes it from the manager.
*/
public void dispose ()
{
@@ -166,7 +163,7 @@ public abstract class Stream
if (_state != AL10.AL_STOPPED) {
stop();
}
// delete the source and buffers
_nbuf.clear();
_nbuf.put(_sourceId).flip();
@@ -174,15 +171,14 @@ public abstract class Stream
_nbuf.clear();
_nbuf.put(_bufferIds).flip();
AL10.alDeleteBuffers(_nbuf);
// remove from manager
_soundmgr.removeStream(this);
}
/**
* Updates the state of this stream, loading data into buffers and
* adjusting gain as necessary. Called periodically by the
* {@link SoundManager}.
* Updates the state of this stream, loading data into buffers and adjusting gain as necessary.
* Called periodically by the {@link SoundManager}.
*
* @param time the amount of time elapsed since the last update
*/
@@ -193,7 +189,7 @@ public abstract class Stream
if (_state != AL10.AL_PLAYING) {
return;
}
// find out how many buffers have been played and unqueue them
int played = AL10.alGetSourcei(_sourceId, AL10.AL_BUFFERS_PROCESSED);
if (played == 0) {
@@ -207,18 +203,17 @@ public abstract class Stream
}
_nbuf.flip();
AL10.alSourceUnqueueBuffers(_sourceId, _nbuf);
// enqueue up to the number of buffers played
queueBuffers(played);
// find out if we're still playing; if not and we have buffers queued,
// we must restart
// find out if we're still playing; if not and we have buffers queued, we must restart
_state = AL10.alGetSourcei(_sourceId, AL10.AL_SOURCE_STATE);
if (_qlen > 0 && _state != AL10.AL_PLAYING) {
play();
}
}
/**
* Updates the gain of the stream according to the fade state.
*/
@@ -239,7 +234,7 @@ public abstract class Stream
_fadeMode = FadeMode.NONE;
}
}
/**
* Queues (up to) the specified number of buffers.
*/
@@ -258,13 +253,12 @@ public abstract class Stream
_nbuf.flip();
AL10.alSourceQueueBuffers(_sourceId, _nbuf);
}
/**
* Populates the identified buffer with as much data as it can hold.
*
* @return true if data was read into the buffer and it should be enqueued,
* false if the end of the stream has been reached and no data was read
* into the buffer
* @return true if data was read into the buffer and it should be enqueued, false if the end of
* the stream has been reached and no data was read into the buffer
*/
protected boolean populateBuffer (int bufferId)
{
@@ -285,66 +279,65 @@ public abstract class Stream
AL10.alBufferData(bufferId, getFormat(), _abuf, getFrequency());
return true;
}
/**
* Returns the OpenAL audio format of the stream.
*/
protected abstract int getFormat ();
/**
* Returns the stream's playback frequency in samples per second.
*/
protected abstract int getFrequency ();
/**
* Populates the given buffer with audio data.
*
* @return the total number of bytes read into the buffer, or -1 if the
* end of the stream has been reached
* @return the total number of bytes read into the buffer, or -1 if the end of the stream has
* been reached
*/
protected abstract int populateBuffer (ByteBuffer buf)
throws IOException;
/** The manager to which the stream was added. */
protected SoundManager _soundmgr;
/** The source through which the stream plays. */
protected int _sourceId;
/** The buffers through which we cycle. */
protected int[] _bufferIds = new int[NUM_BUFFERS];
/** The starting index and length of the current queue in
* {@link #_bufferIds}. */
/** The starting index and length of the current queue in {@link #_bufferIds}. */
protected int _qidx, _qlen;
/** The pitch of the stream. */
protected float _pitch = 1f;
/** The gain of the stream. */
protected float _gain = 1f;
/** The interval and elapsed time for fading. */
protected float _fadeInterval, _fadeElapsed;
/** The type of fading being performed. */
protected FadeMode _fadeMode = FadeMode.NONE;
/** The buffer used to store names. */
protected IntBuffer _nbuf;
/** The buffer used to store audio data temporarily. */
protected ByteBuffer _abuf;
/** The OpenAL state of the stream. */
protected int _state = AL10.AL_INITIAL;
/** The size of the buffers in bytes. */
protected static final int BUFFER_SIZE = 131072;
/** The number of buffers to use. */
protected static final int NUM_BUFFERS = 4;
/** Fading modes. */
protected enum FadeMode { NONE, IN, OUT, OUT_DISPOSE };
}