Mercurial > hg > pulseaudio
view src/java/org/classpath/icedtea/pulseaudio/PulseAudioTargetDataLine.java @ 151:350bc72ba495
2008-09-29 Omair Majid <omajid@redhat.com>
* src/java/org/classpath/icedtea/pulseaudio/PulseAudioTargetDataLine.java
fragmentBuffer is a new class variable that stores partial fragments.
(read): Modified function to work mostly in java. Also takes care of
partial fragments that occur when PulseAudio's fragment size does not
match the buffer length provided by java.
* src/java/org/classpath/icedtea/pulseaudio/Stream.java
(native_pa_stream_read): Removed function.
(read): Removed function.
* src/native/org_classpath_icedtea_pulseaudio_Stream.c
(Java_org_classpath_icedtea_pulseaudio_Stream_native_1pa_1stream_1read):
Commented out function.
* unittests/org/classpath/icedtea/pulseadio/PulseAudioTargetDataLineTest.java
(testOpenWithFormat): Fixed output message.
author | Omair Majid <omajid@redhat.com> |
---|---|
date | Mon, 29 Sep 2008 15:16:15 -0400 |
parents | f29cbcfbc354 |
children | b185dd9217bb |
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/* PulseAudioTargetDataLine.java Copyright (C) 2008 Red Hat, Inc. This file is part of IcedTea. IcedTea is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. IcedTea is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with IcedTea; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package org.classpath.icedtea.pulseaudio; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.LineEvent; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.TargetDataLine; public class PulseAudioTargetDataLine extends PulseAudioDataLine implements TargetDataLine { /* * This contains the data from the PulseAudio buffer that has since been * dropped. If 20 bytes of a fragment of size 200 are read, the other 180 * are dumped in this */ byte[] fragmentBuffer; public PulseAudioTargetDataLine(EventLoop eventLoop, AudioFormat[] formats, AudioFormat defaultFormat) { supportedFormats = formats; this.eventLoop = eventLoop; this.defaultFormat = defaultFormat; this.currentFormat = defaultFormat; } @Override public void close() { if (!isOpen) { throw new IllegalStateException( "Line cant be closed if it isnt open"); } PulseAudioMixer parentMixer = PulseAudioMixer.getInstance(); parentMixer.removeTargetLine(this); super.close(); } @Override public void open(AudioFormat format, int bufferSize) throws LineUnavailableException { if (isOpen) { throw new IllegalStateException("already open"); } super.open(format, bufferSize); framesSinceOpen = 0; PulseAudioMixer parentMixer = PulseAudioMixer.getInstance(); parentMixer.addTargetLine(this); } @Override public void open(AudioFormat format) throws LineUnavailableException { open(format, DEFAULT_BUFFER_SIZE); } protected void connectLine(int bufferSize, Stream masterStream) throws LineUnavailableException { int fragmentSize = bufferSize / 10 > 500 ? bufferSize / 10 : 500; StreamBufferAttributes bufferAttributes = new StreamBufferAttributes( bufferSize, 0, 0, 0, fragmentSize); synchronized (eventLoop.threadLock) { stream.connectForRecording(Stream.DEFAULT_DEVICE, bufferAttributes); } } @Override public int read(byte[] data, int offset, int length) { if (!isOpen) { throw new IllegalStateException("must call open() before read()"); } int frameSize = currentFormat.getFrameSize(); if (length % frameSize != 0) { throw new IllegalArgumentException( "amount of data to read does not represent an integral number of frames"); } if (length < 0) { throw new IllegalArgumentException("length is negative"); } if (length + offset > data.length) { throw new ArrayIndexOutOfBoundsException("index: " + (length + offset) + " array size: " + data.length); } int position = offset; int remainingLength = length; int sizeRead = 0; /* bytes read on each iteration of loop */ int bytesRead; /* * to read, we first take stuff from the fragmentBuffer */ /* on first read() of the line, fragmentBuffer is null */ if (fragmentBuffer != null) { boolean fragmentBufferSmaller = fragmentBuffer.length < length; int smallerBufferLength = Math.min(fragmentBuffer.length, length); System.arraycopy(fragmentBuffer, 0, data, position, smallerBufferLength); if (!fragmentBufferSmaller) { /* * if fragment was larger, then we already have all the data we * need. clean up the buffer before returning. Make a new * fragmentBuffer from the remaining bytes */ int remainingBytesInFragment = (fragmentBuffer.length - length); byte[] newFragmentBuffer = new byte[remainingBytesInFragment]; System.arraycopy(fragmentBuffer, length, newFragmentBuffer, 0, newFragmentBuffer.length); fragmentBuffer = newFragmentBuffer; return length; } /* done with fragment buffer, remove it */ bytesRead = smallerBufferLength; sizeRead += bytesRead; position += bytesRead; remainingLength -= bytesRead; fragmentBuffer = null; } /* * if we need to read more data, then we read from PulseAudio's buffer */ while (remainingLength != 0) { byte[] currentFragment; synchronized (eventLoop.threadLock) { /* read a fragment, and drop it from the server */ currentFragment = stream.peek(); stream.drop(); if (currentFragment == null) { System.out .println("DEBUG: PulseAudioTargetDataLine:read(): error in stream.peek()"); return sizeRead; } bytesRead = Math.min(currentFragment.length, remainingLength); /* * we read more than we required, save the rest of the data in * the fragmentBuffer */ if (bytesRead < currentFragment.length) { /* allocate a buffer to store unsaved data */ fragmentBuffer = new byte[currentFragment.length - bytesRead]; /* copy over the unsaved data */ System.arraycopy(currentFragment, bytesRead, fragmentBuffer, 0, fragmentBuffer.length - bytesRead); } System.arraycopy(currentFragment, 0, data, position, bytesRead); sizeRead += bytesRead; position += bytesRead; remainingLength -= bytesRead; framesSinceOpen += bytesRead / currentFormat.getFrameSize(); } } // all the data should have been played by now assert (sizeRead == length); /* * FIXME when the stream is flushed() etc, instead of returning length * this should unblock and return the the size of data written so far */ return sizeRead; } @Override public void drain() { if (!isOpen) { throw new IllegalStateException("must call open() before drain()"); } // blocks when there is data on the line // http://www.jsresources.org/faq_audio.html#stop_drain_tdl while (isStarted) { try { Thread.sleep(100); } catch (InterruptedException e) { } } } @Override public void flush() { if (!isOpen) { throw new IllegalStateException("Line must be open"); } Operation operation; synchronized (eventLoop.threadLock) { operation = stream.flush(); } operation.waitForCompletion(); operation.releaseReference(); } public int available() { if (!isOpen) { throw new IllegalStateException("Line must be open"); } synchronized (eventLoop.threadLock) { return stream.getReableSize(); } } public int getFramePosition() { return (int) framesSinceOpen; } public long getLongFramePosition() { return framesSinceOpen; } public long getMicrosecondPosition() { return (long) (framesSinceOpen / currentFormat.getFrameRate()); } /* * A TargetData starts when we ask it to and continues playing until we ask * it to stop. there are no buffer underruns/overflows or anything so we * will just fire the LineEvents manually */ @Override public void start() { super.start(); fireLineEvent(new LineEvent(this, LineEvent.Type.START, framesSinceOpen)); } @Override public void stop() { super.stop(); fireLineEvent(new LineEvent(this, LineEvent.Type.STOP, framesSinceOpen)); } }