diff options
Diffstat (limited to 'songdbj/javazoom/jl/decoder/SampleBuffer.java')
-rw-r--r-- | songdbj/javazoom/jl/decoder/SampleBuffer.java | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/songdbj/javazoom/jl/decoder/SampleBuffer.java b/songdbj/javazoom/jl/decoder/SampleBuffer.java new file mode 100644 index 0000000000..ba4bfa060f --- /dev/null +++ b/songdbj/javazoom/jl/decoder/SampleBuffer.java | |||
@@ -0,0 +1,132 @@ | |||
1 | /* | ||
2 | * 11/19/04 1.0 moved to LGPL. | ||
3 | * | ||
4 | * 12/12/99 Initial Version based on FileObuffer. mdm@techie.com. | ||
5 | * | ||
6 | * FileObuffer: | ||
7 | * 15/02/99 Java Conversion by E.B ,javalayer@javazoom.net | ||
8 | * | ||
9 | *----------------------------------------------------------------------- | ||
10 | * This program is free software; you can redistribute it and/or modify | ||
11 | * it under the terms of the GNU Library General Public License as published | ||
12 | * by the Free Software Foundation; either version 2 of the License, or | ||
13 | * (at your option) any later version. | ||
14 | * | ||
15 | * This program is distributed in the hope that it will be useful, | ||
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 | * GNU Library General Public License for more details. | ||
19 | * | ||
20 | * You should have received a copy of the GNU Library General Public | ||
21 | * License along with this program; if not, write to the Free Software | ||
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
23 | *---------------------------------------------------------------------- | ||
24 | */ | ||
25 | |||
26 | package javazoom.jl.decoder; | ||
27 | |||
28 | /** | ||
29 | * The <code>SampleBuffer</code> class implements an output buffer | ||
30 | * that provides storage for a fixed size block of samples. | ||
31 | */ | ||
32 | public class SampleBuffer extends Obuffer | ||
33 | { | ||
34 | private short[] buffer; | ||
35 | private int[] bufferp; | ||
36 | private int channels; | ||
37 | private int frequency; | ||
38 | |||
39 | /** | ||
40 | * Constructor | ||
41 | */ | ||
42 | public SampleBuffer(int sample_frequency, int number_of_channels) | ||
43 | { | ||
44 | buffer = new short[OBUFFERSIZE]; | ||
45 | bufferp = new int[MAXCHANNELS]; | ||
46 | channels = number_of_channels; | ||
47 | frequency = sample_frequency; | ||
48 | |||
49 | for (int i = 0; i < number_of_channels; ++i) | ||
50 | bufferp[i] = (short)i; | ||
51 | |||
52 | } | ||
53 | |||
54 | public int getChannelCount() | ||
55 | { | ||
56 | return this.channels; | ||
57 | } | ||
58 | |||
59 | public int getSampleFrequency() | ||
60 | { | ||
61 | return this.frequency; | ||
62 | } | ||
63 | |||
64 | public short[] getBuffer() | ||
65 | { | ||
66 | return this.buffer; | ||
67 | } | ||
68 | |||
69 | public int getBufferLength() | ||
70 | { | ||
71 | return bufferp[0]; | ||
72 | } | ||
73 | |||
74 | /** | ||
75 | * Takes a 16 Bit PCM sample. | ||
76 | */ | ||
77 | public void append(int channel, short value) | ||
78 | { | ||
79 | buffer[bufferp[channel]] = value; | ||
80 | bufferp[channel] += channels; | ||
81 | } | ||
82 | |||
83 | public void appendSamples(int channel, float[] f) | ||
84 | { | ||
85 | int pos = bufferp[channel]; | ||
86 | |||
87 | short s; | ||
88 | float fs; | ||
89 | for (int i=0; i<32;) | ||
90 | { | ||
91 | fs = f[i++]; | ||
92 | fs = (fs>32767.0f ? 32767.0f | ||
93 | : (fs < -32767.0f ? -32767.0f : fs)); | ||
94 | |||
95 | s = (short)fs; | ||
96 | buffer[pos] = s; | ||
97 | pos += channels; | ||
98 | } | ||
99 | |||
100 | bufferp[channel] = pos; | ||
101 | } | ||
102 | |||
103 | |||
104 | /** | ||
105 | * Write the samples to the file (Random Acces). | ||
106 | */ | ||
107 | public void write_buffer(int val) | ||
108 | { | ||
109 | |||
110 | //for (int i = 0; i < channels; ++i) | ||
111 | // bufferp[i] = (short)i; | ||
112 | |||
113 | } | ||
114 | |||
115 | public void close() | ||
116 | {} | ||
117 | |||
118 | /** | ||
119 | * | ||
120 | */ | ||
121 | public void clear_buffer() | ||
122 | { | ||
123 | for (int i = 0; i < channels; ++i) | ||
124 | bufferp[i] = (short)i; | ||
125 | } | ||
126 | |||
127 | /** | ||
128 | * | ||
129 | */ | ||
130 | public void set_stop_flag() | ||
131 | {} | ||
132 | } | ||