diff options
Diffstat (limited to 'src/jogl/classes/jogamp/opengl/openal')
| -rw-r--r-- | src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java new file mode 100644 index 000000000..9f0561cb3 --- /dev/null +++ b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java @@ -0,0 +1,168 @@ +package jogamp.opengl.openal.av; + +import java.nio.Buffer; +import java.nio.ByteBuffer; + +import jogamp.opengl.util.av.AudioSink; + +import com.jogamp.common.nio.Buffers; +import com.jogamp.openal.*; + +public class ALAudioSink implements AudioSink { + + static ALC alc; + static AL al; + static ALCdevice device; + static ALCcontext context; + + // AudioFormat parameters + public static final int SAMPLE_RATE = 44100; + + // Chunk of audio processed at one time + public static final int BUFFER_SIZE = 1000; + public static final int SAMPLES_PER_BUFFER = BUFFER_SIZE / 2; + + // Sample time values + public static final double SAMPLE_TIME_IN_SECS = 1.0 / SAMPLE_RATE; + public static final double BUFFER_TIME_IN_SECS = SAMPLE_TIME_IN_SECS * SAMPLES_PER_BUFFER; + + private static int NUM_BUFFERS = 5; + private static int bufferNumber = 0; + private static int[] buffers = new int[NUM_BUFFERS]; + private static int[] source = new int[1]; + private static boolean initBuffer = true; + private static int frequency = 44100; + private static int format = AL.AL_FORMAT_STEREO16; + + private static boolean available = false; + + static { + + boolean joalFound = false; + try { + Class.forName("com.jogamp.openal.ALFactory"); + joalFound = true; + } catch(ClassNotFoundException e){ + // Joal not found on classpath + } + + if(joalFound) { + + alc = ALFactory.getALC(); + String deviceSpecifier; + + // Get handle to default device. + device = alc.alcOpenDevice(null); + if (device == null) { + throw new ALException("Error opening default OpenAL device"); + } + + // Get the device specifier. + deviceSpecifier = alc.alcGetString(device, ALC.ALC_DEVICE_SPECIFIER); + if (deviceSpecifier == null) { + throw new ALException("Error getting specifier for default OpenAL device"); + } + + // Create audio context. + context = alc.alcCreateContext(device, null); + if (context == null) { + throw new ALException("Error creating OpenAL context"); + } + + // Set active context. + alc.alcMakeContextCurrent(context); + + // Check for an error. + if (alc.alcGetError(device) != ALC.ALC_NO_ERROR) { + throw new ALException("Error making OpenAL context current"); + } + + al = ALFactory.getAL(); + + // Allocate buffers + al.alGenBuffers(NUM_BUFFERS, buffers, 0); + al.alGenSources(1, source, 0); + al.alSourcei(source[0], AL.AL_BUFFER, buffers[0]); + + if(al.alGetError() != AL.AL_NO_ERROR) { + throw new ALException("Error generating :("); + } + + System.out.println("OpenAL audio sink using device: " + deviceSpecifier); + available = true; + } + } + + @Override + public boolean isDataAvailable(int data_size) { + return true; + } + + @Override + public void writeData(byte[] sampleData, int data_size) { + // OpenAL consumes buffers in the background + // we first need to initialize the OpenAL buffers then + // start continous playback. + alc.alcMakeContextCurrent(context); + if(initBuffer) { + + ByteBuffer data = Buffers.newDirectByteBuffer(sampleData); + al.alBufferData(buffers[bufferNumber], format, data, data_size, frequency); + int error = al.alGetError(); + if(error != AL.AL_NO_ERROR) { + System.out.println("bufferNumber"+bufferNumber+" Data "+sampleData+" size"+data_size); + throw new ALException("Error loading :( error code: " + error); + } + + if(bufferNumber==NUM_BUFFERS-1){ + // all buffers queued + al.alSourceQueueBuffers(source[0], NUM_BUFFERS, buffers, 0); + // start playback + al.alSourcePlay(source[0]); + if(al.alGetError() != AL.AL_NO_ERROR) { + throw new ALException("Error starting :("); + } + initBuffer=false; + } + + // update buffer number to fill + bufferNumber=(bufferNumber+1)%NUM_BUFFERS; + } else { + // OpenAL is playing in the background. + // one new frame with audio data is ready + + // first wait for openal to release one buffer + int[] buffer=new int[1]; + int[] val=new int[1]; + do { + al.alGetSourcei(source[0], AL.AL_BUFFERS_PROCESSED, val, 0); + } while (val[0] <= 0); + + // fill and requeue the empty buffer + al.alSourceUnqueueBuffers(source[0], 1, buffer , 0); + Buffer data = Buffers.newDirectByteBuffer(sampleData); + al.alBufferData(buffer[0], format, data, data_size, frequency); + al.alSourceQueueBuffers(source[0], 1, buffer, 0); + if(al.alGetError() != AL.AL_NO_ERROR) { + throw new ALException("Error buffering :("); + } + + // Restart openal playback if needed + al.alGetSourcei(source[0], AL.AL_SOURCE_STATE, val, 0); + if(val[0] != al.AL_PLAYING) { + al.alSourcePlay(source[0]); + } + } + } + + @Override + public int getDataAvailable() { + int[] val=new int[1]; + al.alGetSourcei(source[0], AL.AL_BUFFERS_PROCESSED, val, 0); + return (NUM_BUFFERS-val[0])*4096; + } + + public static boolean isAvailable() { + return available; + } +} |