1 files changed, 129 insertions, 0 deletions
diff --git a/src/main/java/com/jsyn/util/soundfile/AudioFileParser.java b/src/main/java/com/jsyn/util/soundfile/AudioFileParser.java
new file mode 100644
index 0000000..e7bb066
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+++ b/src/main/java/com/jsyn/util/soundfile/AudioFileParser.java
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+/*
+ * Copyright 2001 Phil Burk, Mobileer Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jsyn.util.soundfile;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+import com.jsyn.data.FloatSample;
+import com.jsyn.data.SampleMarker;
+
+/**
+ * Base class for various types of audio specific file parsers.
+ * 
+ * @author (C) 2001 Phil Burk, SoftSynth.com
+ */
+
+abstract class AudioFileParser implements ChunkHandler {
+    IFFParser parser;
+    protected byte[] byteData;
+    boolean ifLoadData = true; /* If true, load sound data into memory. */
+    long dataPosition; /*
+                        * Number of bytes from beginning of file where sound data resides.
+                        */
+    protected int bitsPerSample;
+    protected int bytesPerFrame; // in the file
+    protected int bytesPerSample; // in the file
+    protected HashMap<Integer, SampleMarker> cueMap = new HashMap<Integer, SampleMarker>();
+    protected short samplesPerFrame;
+    protected double frameRate;
+    protected int numFrames;
+    protected double originalPitch = 60.0;
+    protected int sustainBegin = -1;
+    protected int sustainEnd = -1;
+
+    public AudioFileParser() {
+    }
+
+    /**
+     * @return Number of bytes from beginning of stream where sound data resides.
+     */
+    public long getDataPosition() {
+        return dataPosition;
+    }
+
+    /**
+     * This can be read by another thread when load()ing a sample to determine how many bytes have
+     * been read so far.
+     */
+    public synchronized long getNumBytesRead() {
+        IFFParser p = parser; // prevent race
+        if (p != null)
+            return p.getOffset();
+        else
+            return 0;
+    }
+
+    /**
+     * This can be read by another thread when load()ing a sample to determine how many bytes need
+     * to be read.
+     */
+    public synchronized long getFileSize() {
+        IFFParser p = parser; // prevent race
+        if (p != null)
+            return p.getFileSize();
+        else
+            return 0;
+    }
+
+    protected SampleMarker findOrCreateCuePoint(int uniqueID) {
+        SampleMarker cuePoint = cueMap.get(uniqueID);
+        if (cuePoint == null) {
+            cuePoint = new SampleMarker();
+            cueMap.put(uniqueID, cuePoint);
+        }
+        return cuePoint;
+    }
+
+    public FloatSample load(IFFParser parser) throws IOException {
+        this.parser = parser;
+        parser.parseAfterHead(this);
+        return finish();
+    }
+
+    abstract FloatSample finish() throws IOException;
+
+    FloatSample makeSample(float[] floatData) throws IOException {
+        FloatSample floatSample = new FloatSample(floatData, samplesPerFrame);
+
+        floatSample.setChannelsPerFrame(samplesPerFrame);
+        floatSample.setFrameRate(frameRate);
+        floatSample.setPitch(originalPitch);
+
+        if (sustainBegin >= 0) {
+            floatSample.setSustainBegin(sustainBegin);
+            floatSample.setSustainEnd(sustainEnd);
+        }
+
+        for (SampleMarker marker : cueMap.values()) {
+            floatSample.addMarker(marker);
+        }
+
+        /* Set Sustain Loop by assuming first two markers are loop points. */
+        if (floatSample.getMarkerCount() >= 2) {
+            floatSample.setSustainBegin(floatSample.getMarker(0).position);
+            floatSample.setSustainEnd(floatSample.getMarker(1).position);
+        }
+        return floatSample;
+    }
+
+    protected String parseString(IFFParser parser, int textLength) throws IOException {
+        byte[] bar = new byte[textLength];
+        parser.read(bar);
+        return new String(bar);
+    }
+}