1 /*
2 * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.media.sound;
27
28 import java.io.DataInputStream;
29 import java.io.IOException;
30 import java.io.InputStream;
31
32 import javax.sound.sampled.AudioFileFormat.Type;
33 import javax.sound.sampled.AudioFormat;
34 import javax.sound.sampled.AudioSystem;
35 import javax.sound.sampled.UnsupportedAudioFileException;
36
37 /**
38 * AIFF file reader and writer.
39 *
40 * @author Kara Kytle
41 * @author Jan Borgersen
42 * @author Florian Bomers
43 */
44 public final class AiffFileReader extends SunFileReader {
45
46 @Override
47 StandardFileFormat getAudioFileFormatImpl(final InputStream stream)
48 throws UnsupportedAudioFileException, IOException {
49 DataInputStream dis = new DataInputStream(stream);
50
51 AudioFormat format = null;
52
53 // Read the magic number
54 int magic = dis.readInt();
55
56 // $$fb: fix for 4369044: javax.sound.sampled.AudioSystem.getAudioInputStream() works wrong with Cp037
57 if (magic != AiffFileFormat.AIFF_MAGIC) {
58 // not AIFF, throw exception
59 throw new UnsupportedAudioFileException("not an AIFF file");
60 }
61
62 long /* unsigned 32bit */ frameLength = 0;
63 int length = dis.readInt();
64 int iffType = dis.readInt();
65
66 final long totallength;
67 if(length <= 0 ) {
68 length = AudioSystem.NOT_SPECIFIED;
69 totallength = AudioSystem.NOT_SPECIFIED;
70 } else {
71 totallength = length + 8;
72 }
73
74 // Is this an AIFC or just plain AIFF file.
75 boolean aifc = false;
76 // $$fb: fix for 4369044: javax.sound.sampled.AudioSystem.getAudioInputStream() works wrong with Cp037
77 if (iffType == AiffFileFormat.AIFC_MAGIC) {
78 aifc = true;
79 }
80
81 // Loop through the AIFF chunks until
82 // we get to the SSND chunk.
83 boolean ssndFound = false;
84 while (!ssndFound) {
85 // Read the chunk name
86 int chunkName = dis.readInt();
87 int chunkLen = dis.readInt();
88
89 int chunkRead = 0;
90
91 // Switch on the chunk name.
92 switch (chunkName) {
93 case AiffFileFormat.FVER_MAGIC:
94 // Ignore format version for now.
95 break;
96
97 case AiffFileFormat.COMM_MAGIC:
98 // AIFF vs. AIFC
99 // $$fb: fix for 4399551: Repost of bug candidate: cannot replay aif file (Review ID: 108108)
100 if ((!aifc && chunkLen < 18) || (aifc && chunkLen < 22)) {
101 throw new UnsupportedAudioFileException("Invalid AIFF/COMM chunksize");
102 }
103 // Read header info.
104 int channels = dis.readUnsignedShort();
105 if (channels <= 0) {
106 throw new UnsupportedAudioFileException("Invalid number of channels");
107 }
108 frameLength = dis.readInt() & 0xffffffffL; // numSampleFrames
109
110 int sampleSizeInBits = dis.readUnsignedShort();
111 if (sampleSizeInBits < 1 || sampleSizeInBits > 32) {
112 throw new UnsupportedAudioFileException("Invalid AIFF/COMM sampleSize");
113 }
114 float sampleRate = (float) read_ieee_extended(dis);
115 chunkRead += (2 + 4 + 2 + 10);
116
117 // If this is not AIFC then we assume it's
118 // a linearly encoded file.
119 AudioFormat.Encoding encoding = AudioFormat.Encoding.PCM_SIGNED;
120
121 if (aifc) {
122 int enc = dis.readInt(); chunkRead += 4;
123 switch (enc) {
124 case AiffFileFormat.AIFC_PCM:
125 encoding = AudioFormat.Encoding.PCM_SIGNED;
126 break;
127 case AiffFileFormat.AIFC_ULAW:
128 encoding = AudioFormat.Encoding.ULAW;
129 sampleSizeInBits = 8; // Java Sound convention
130 break;
131 default:
132 throw new UnsupportedAudioFileException("Invalid AIFF encoding");
133 }
134 }
135 int frameSize = calculatePCMFrameSize(sampleSizeInBits, channels);
136 //$fb what's that ??
137 //if (sampleSizeInBits == 8) {
138 // encoding = AudioFormat.Encoding.PCM_SIGNED;
139 //}
140 format = new AudioFormat(encoding, sampleRate,
141 sampleSizeInBits, channels,
142 frameSize, sampleRate, true);
143 break;
144 case AiffFileFormat.SSND_MAGIC:
145 // Data chunk.
146 int dataOffset = dis.readInt(); // for now unused in javasound
147 int blocksize = dis.readInt(); // for now unused in javasound
148 chunkRead += 8;
149 ssndFound = true;
150 break;
151 } // switch
152 // skip the remainder of this chunk
153 if (!ssndFound) {
154 int toSkip = chunkLen - chunkRead;
155 if (toSkip > 0) {
156 dis.skipBytes(toSkip);
157 }
158 }
159 } // while
160
161 if (format == null) {
162 throw new UnsupportedAudioFileException("missing COMM chunk");
163 }
164 Type type = aifc ? Type.AIFC : Type.AIFF;
165
166 return new AiffFileFormat(type, totallength, format, frameLength);
167 }
168
169 // HELPER METHODS
170 /**
171 * read_ieee_extended
172 * Extended precision IEEE floating-point conversion routine.
173 * @argument DataInputStream
174 * @return double
175 * @exception IOException
176 */
177 private double read_ieee_extended(DataInputStream dis) throws IOException {
178
179 double f = 0;
180 int expon = 0;
181 long hiMant = 0, loMant = 0;
182 long t1, t2;
183 double HUGE = 3.40282346638528860e+38;
184
185
186 expon = dis.readUnsignedShort();
187
188 t1 = (long)dis.readUnsignedShort();
189 t2 = (long)dis.readUnsignedShort();
190 hiMant = t1 << 16 | t2;
191
192 t1 = (long)dis.readUnsignedShort();
193 t2 = (long)dis.readUnsignedShort();
194 loMant = t1 << 16 | t2;
195
196 if (expon == 0 && hiMant == 0 && loMant == 0) {
197 f = 0;
198 } else {
199 if (expon == 0x7FFF)
200 f = HUGE;
201 else {
202 expon -= 16383;
203 expon -= 31;
204 f = (hiMant * Math.pow(2, expon));
205 expon -= 32;
206 f += (loMant * Math.pow(2, expon));
207 }
208 }
209
210 return f;
211 }
212 }