1 /*
2 * Copyright (c) 2007, 2013, 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.ByteArrayInputStream;
29 import java.io.File;
30 import java.io.IOException;
31 import java.io.InputStream;
32 import java.net.URL;
33
34 import javax.sound.sampled.AudioFormat;
35 import javax.sound.sampled.AudioInputStream;
36 import javax.sound.sampled.AudioSystem;
37 import javax.sound.sampled.UnsupportedAudioFileException;
38
39 /**
40 * This class is used to create AudioFloatInputStream from AudioInputStream and
41 * byte buffers.
42 *
43 * @author Karl Helgason
44 */
45 public abstract class AudioFloatInputStream {
46
47 private static class BytaArrayAudioFloatInputStream
48 extends AudioFloatInputStream {
49
50 private int pos = 0;
51 private int markpos = 0;
52 private final AudioFloatConverter converter;
53 private final AudioFormat format;
54 private final byte[] buffer;
55 private final int buffer_offset;
56 private final int buffer_len;
57 private final int framesize_pc;
58
59 BytaArrayAudioFloatInputStream(AudioFloatConverter converter,
60 byte[] buffer, int offset, int len) {
61 this.converter = converter;
62 this.format = converter.getFormat();
63 this.buffer = buffer;
64 this.buffer_offset = offset;
65 framesize_pc = format.getFrameSize() / format.getChannels();
66 this.buffer_len = len / framesize_pc;
67
68 }
69
70 @Override
71 public AudioFormat getFormat() {
72 return format;
73 }
74
75 @Override
76 public long getFrameLength() {
77 return buffer_len;// / format.getFrameSize();
78 }
79
80 @Override
81 public int read(float[] b, int off, int len) throws IOException {
82 if (b == null)
83 throw new NullPointerException();
84 if (off < 0 || len < 0 || len > b.length - off)
85 throw new IndexOutOfBoundsException();
86 if (pos >= buffer_len)
87 return -1;
88 if (len == 0)
89 return 0;
90 if (pos + len > buffer_len)
91 len = buffer_len - pos;
92 converter.toFloatArray(buffer, buffer_offset + pos * framesize_pc,
93 b, off, len);
94 pos += len;
95 return len;
96 }
97
98 @Override
99 public long skip(long len) throws IOException {
100 if (pos >= buffer_len)
101 return -1;
102 if (len <= 0)
103 return 0;
104 if (pos + len > buffer_len)
105 len = buffer_len - pos;
106 pos += len;
107 return len;
108 }
109
110 @Override
111 public int available() throws IOException {
112 return buffer_len - pos;
113 }
114
115 @Override
116 public void close() throws IOException {
117 }
118
119 @Override
120 public void mark(int readlimit) {
121 markpos = pos;
122 }
123
124 @Override
125 public boolean markSupported() {
126 return true;
127 }
128
129 @Override
130 public void reset() throws IOException {
131 pos = markpos;
132 }
133 }
134
135 private static class DirectAudioFloatInputStream
136 extends AudioFloatInputStream {
137
138 private final AudioInputStream stream;
139 private AudioFloatConverter converter;
140 private final int framesize_pc; // framesize / channels
141 private byte[] buffer;
142
143 DirectAudioFloatInputStream(AudioInputStream stream) {
144 converter = AudioFloatConverter.getConverter(stream.getFormat());
145 if (converter == null) {
146 AudioFormat format = stream.getFormat();
147 AudioFormat newformat;
148
149 AudioFormat[] formats = AudioSystem.getTargetFormats(
150 AudioFormat.Encoding.PCM_SIGNED, format);
151 if (formats.length != 0) {
152 newformat = formats[0];
153 } else {
154 float samplerate = format.getSampleRate();
155 int samplesizeinbits = format.getSampleSizeInBits();
156 int framesize = format.getFrameSize();
157 float framerate = format.getFrameRate();
158 samplesizeinbits = 16;
159 framesize = format.getChannels() * (samplesizeinbits / 8);
160 framerate = samplerate;
161
162 newformat = new AudioFormat(
163 AudioFormat.Encoding.PCM_SIGNED, samplerate,
164 samplesizeinbits, format.getChannels(), framesize,
165 framerate, false);
166 }
167
168 stream = AudioSystem.getAudioInputStream(newformat, stream);
169 converter = AudioFloatConverter.getConverter(stream.getFormat());
170 }
171 framesize_pc = stream.getFormat().getFrameSize()
172 / stream.getFormat().getChannels();
173 this.stream = stream;
174 }
175
176 @Override
177 public AudioFormat getFormat() {
178 return stream.getFormat();
179 }
180
181 @Override
182 public long getFrameLength() {
183 return stream.getFrameLength();
184 }
185
186 @Override
187 public int read(float[] b, int off, int len) throws IOException {
188 int b_len = len * framesize_pc;
189 if (buffer == null || buffer.length < b_len)
190 buffer = new byte[b_len];
191 int ret = stream.read(buffer, 0, b_len);
192 if (ret == -1)
193 return -1;
194 converter.toFloatArray(buffer, b, off, ret / framesize_pc);
195 return ret / framesize_pc;
196 }
197
198 @Override
199 public long skip(long len) throws IOException {
200 long b_len = len * framesize_pc;
201 long ret = stream.skip(b_len);
202 if (ret == -1)
203 return -1;
204 return ret / framesize_pc;
205 }
206
207 @Override
208 public int available() throws IOException {
209 return stream.available() / framesize_pc;
210 }
211
212 @Override
213 public void close() throws IOException {
214 stream.close();
215 }
216
217 @Override
218 public void mark(int readlimit) {
219 stream.mark(readlimit * framesize_pc);
220 }
221
222 @Override
223 public boolean markSupported() {
224 return stream.markSupported();
225 }
226
227 @Override
228 public void reset() throws IOException {
229 stream.reset();
230 }
231 }
232
233 public static AudioFloatInputStream getInputStream(URL url)
234 throws UnsupportedAudioFileException, IOException {
235 return new DirectAudioFloatInputStream(AudioSystem
236 .getAudioInputStream(url));
237 }
238
239 public static AudioFloatInputStream getInputStream(File file)
240 throws UnsupportedAudioFileException, IOException {
241 return new DirectAudioFloatInputStream(AudioSystem
242 .getAudioInputStream(file));
243 }
244
245 public static AudioFloatInputStream getInputStream(InputStream stream)
246 throws UnsupportedAudioFileException, IOException {
247 return new DirectAudioFloatInputStream(AudioSystem
248 .getAudioInputStream(stream));
249 }
250
251 public static AudioFloatInputStream getInputStream(
252 AudioInputStream stream) {
253 return new DirectAudioFloatInputStream(stream);
254 }
255
256 public static AudioFloatInputStream getInputStream(AudioFormat format,
257 byte[] buffer, int offset, int len) {
258 AudioFloatConverter converter = AudioFloatConverter
259 .getConverter(format);
260 if (converter != null)
261 return new BytaArrayAudioFloatInputStream(converter, buffer,
262 offset, len);
263
264 InputStream stream = new ByteArrayInputStream(buffer, offset, len);
265 long aLen = format.getFrameSize() == AudioSystem.NOT_SPECIFIED
266 ? AudioSystem.NOT_SPECIFIED : len / format.getFrameSize();
267 AudioInputStream astream = new AudioInputStream(stream, format, aLen);
268 return getInputStream(astream);
269 }
270
271 public abstract AudioFormat getFormat();
272
273 public abstract long getFrameLength();
274
275 public abstract int read(float[] b, int off, int len) throws IOException;
276
277 public final int read(float[] b) throws IOException {
278 return read(b, 0, b.length);
279 }
280
281 public final float read() throws IOException {
282 float[] b = new float[1];
283 int ret = read(b, 0, 1);
284 if (ret == -1 || ret == 0)
285 return 0;
286 return b[0];
287 }
288
289 public abstract long skip(long len) throws IOException;
290
291 public abstract int available() throws IOException;
292
293 public abstract void close() throws IOException;
294
295 public abstract void mark(int readlimit);
296
297 public abstract boolean markSupported();
298
299 public abstract void reset() throws IOException;
300 }