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8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
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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).
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25 
26 package com.sun.media.sound;
27 
28 import java.util.Arrays;
29 
30 import javax.sound.sampled.AudioFormat;
31 
32 /**
33  * This class is used to store audio buffer.
34  *
35  * @author Karl Helgason
36  */
37 public final class SoftAudioBuffer {
38 
39     private int size;
40     private float[] buffer;
41     private boolean empty = true;
42     private AudioFormat format;
43     private AudioFloatConverter converter;
44     private byte[] converter_buffer;
45 
SoftAudioBuffer(int size, AudioFormat format)46     public SoftAudioBuffer(int size, AudioFormat format) {
47         this.size = size;
48         this.format = format;
49         converter = AudioFloatConverter.getConverter(format);
50     }
51 
swap(SoftAudioBuffer swap)52     public void swap(SoftAudioBuffer swap)
53     {
54         int bak_size = size;
55         float[] bak_buffer = buffer;
56         boolean bak_empty = empty;
57         AudioFormat bak_format = format;
58         AudioFloatConverter bak_converter = converter;
59         byte[] bak_converter_buffer = converter_buffer;
60 
61         size = swap.size;
62         buffer = swap.buffer;
63         empty = swap.empty;
64         format = swap.format;
65         converter = swap.converter;
66         converter_buffer = swap.converter_buffer;
67 
68         swap.size = bak_size;
69         swap.buffer = bak_buffer;
70         swap.empty = bak_empty;
71         swap.format = bak_format;
72         swap.converter = bak_converter;
73         swap.converter_buffer = bak_converter_buffer;
74     }
75 
getFormat()76     public AudioFormat getFormat() {
77         return format;
78     }
79 
getSize()80     public int getSize() {
81         return size;
82     }
83 
clear()84     public void clear() {
85         if (!empty) {
86             Arrays.fill(buffer, 0);
87             empty = true;
88         }
89     }
90 
isSilent()91     public boolean isSilent() {
92         return empty;
93     }
94 
array()95     public float[] array() {
96         empty = false;
97         if (buffer == null)
98             buffer = new float[size];
99         return buffer;
100     }
101 
get(byte[] buffer, int channel)102     public void get(byte[] buffer, int channel) {
103 
104         int framesize_pc = (format.getFrameSize() / format.getChannels());
105         int c_len = size * framesize_pc;
106         if (converter_buffer == null || converter_buffer.length < c_len)
107             converter_buffer = new byte[c_len];
108 
109         if (format.getChannels() == 1) {
110             converter.toByteArray(array(), size, buffer);
111         } else {
112             converter.toByteArray(array(), size, converter_buffer);
113             if (channel >= format.getChannels())
114                 return;
115             int z_stepover = format.getChannels() * framesize_pc;
116             int k_stepover = framesize_pc;
117             for (int j = 0; j < framesize_pc; j++) {
118                 int k = j;
119                 int z = channel * framesize_pc + j;
120                 for (int i = 0; i < size; i++) {
121                     buffer[z] = converter_buffer[k];
122                     z += z_stepover;
123                     k += k_stepover;
124                 }
125             }
126         }
127     }
128 }
129