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13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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25 
26 package com.sun.media.sound;
27 
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.util.ArrayList;
31 import java.util.List;
32 
33 import javax.sound.sampled.AudioInputStream;
34 import javax.sound.sampled.AudioSystem;
35 
36 /**
37  * Main mixer for SoftMixingMixer.
38  *
39  * @author Karl Helgason
40  */
41 public final class SoftMixingMainMixer {
42 
43     public static final int CHANNEL_LEFT = 0;
44 
45     public static final int CHANNEL_RIGHT = 1;
46 
47     public static final int CHANNEL_EFFECT1 = 2;
48 
49     public static final int CHANNEL_EFFECT2 = 3;
50 
51     public static final int CHANNEL_EFFECT3 = 4;
52 
53     public static final int CHANNEL_EFFECT4 = 5;
54 
55     public static final int CHANNEL_LEFT_DRY = 10;
56 
57     public static final int CHANNEL_RIGHT_DRY = 11;
58 
59     public static final int CHANNEL_SCRATCH1 = 12;
60 
61     public static final int CHANNEL_SCRATCH2 = 13;
62 
63     public static final int CHANNEL_CHANNELMIXER_LEFT = 14;
64 
65     public static final int CHANNEL_CHANNELMIXER_RIGHT = 15;
66 
67     private final SoftMixingMixer mixer;
68 
69     private final AudioInputStream ais;
70 
71     private final SoftAudioBuffer[] buffers;
72 
73     private final SoftAudioProcessor reverb;
74 
75     private final SoftAudioProcessor chorus;
76 
77     private final SoftAudioProcessor agc;
78 
79     private final int nrofchannels;
80 
81     private final Object control_mutex;
82 
83     private final List<SoftMixingDataLine> openLinesList = new ArrayList<>();
84 
85     private SoftMixingDataLine[] openLines = new SoftMixingDataLine[0];
86 
getInputStream()87     public AudioInputStream getInputStream() {
88         return ais;
89     }
90 
processAudioBuffers()91     void processAudioBuffers() {
92         for (int i = 0; i < buffers.length; i++) {
93             buffers[i].clear();
94         }
95 
96         SoftMixingDataLine[] openLines;
97         synchronized (control_mutex) {
98             openLines = this.openLines;
99             for (int i = 0; i < openLines.length; i++) {
100                 openLines[i].processControlLogic();
101             }
102             chorus.processControlLogic();
103             reverb.processControlLogic();
104             agc.processControlLogic();
105         }
106         for (int i = 0; i < openLines.length; i++) {
107             openLines[i].processAudioLogic(buffers);
108         }
109 
110         chorus.processAudio();
111         reverb.processAudio();
112 
113         agc.processAudio();
114 
115     }
116 
SoftMixingMainMixer(SoftMixingMixer mixer)117     public SoftMixingMainMixer(SoftMixingMixer mixer) {
118         this.mixer = mixer;
119 
120         nrofchannels = mixer.getFormat().getChannels();
121 
122         int buffersize = (int) (mixer.getFormat().getSampleRate() / mixer
123                 .getControlRate());
124 
125         control_mutex = mixer.control_mutex;
126         buffers = new SoftAudioBuffer[16];
127         for (int i = 0; i < buffers.length; i++) {
128             buffers[i] = new SoftAudioBuffer(buffersize, mixer.getFormat());
129 
130         }
131 
132         reverb = new SoftReverb();
133         chorus = new SoftChorus();
134         agc = new SoftLimiter();
135 
136         float samplerate = mixer.getFormat().getSampleRate();
137         float controlrate = mixer.getControlRate();
138         reverb.init(samplerate, controlrate);
139         chorus.init(samplerate, controlrate);
140         agc.init(samplerate, controlrate);
141 
142         reverb.setMixMode(true);
143         chorus.setMixMode(true);
144         agc.setMixMode(false);
145 
146         chorus.setInput(0, buffers[CHANNEL_EFFECT2]);
147         chorus.setOutput(0, buffers[CHANNEL_LEFT]);
148         if (nrofchannels != 1)
149             chorus.setOutput(1, buffers[CHANNEL_RIGHT]);
150         chorus.setOutput(2, buffers[CHANNEL_EFFECT1]);
151 
152         reverb.setInput(0, buffers[CHANNEL_EFFECT1]);
153         reverb.setOutput(0, buffers[CHANNEL_LEFT]);
154         if (nrofchannels != 1)
155             reverb.setOutput(1, buffers[CHANNEL_RIGHT]);
156 
157         agc.setInput(0, buffers[CHANNEL_LEFT]);
158         if (nrofchannels != 1)
159             agc.setInput(1, buffers[CHANNEL_RIGHT]);
160         agc.setOutput(0, buffers[CHANNEL_LEFT]);
161         if (nrofchannels != 1)
162             agc.setOutput(1, buffers[CHANNEL_RIGHT]);
163 
164         InputStream in = new InputStream() {
165 
166             private final SoftAudioBuffer[] buffers = SoftMixingMainMixer.this.buffers;
167 
168             private final int nrofchannels = SoftMixingMainMixer.this.mixer
169                     .getFormat().getChannels();
170 
171             private final int buffersize = buffers[0].getSize();
172 
173             private final byte[] bbuffer = new byte[buffersize
174                     * (SoftMixingMainMixer.this.mixer.getFormat()
175                             .getSampleSizeInBits() / 8) * nrofchannels];
176 
177             private int bbuffer_pos = 0;
178 
179             private final byte[] single = new byte[1];
180 
181             public void fillBuffer() {
182                 processAudioBuffers();
183                 for (int i = 0; i < nrofchannels; i++)
184                     buffers[i].get(bbuffer, i);
185                 bbuffer_pos = 0;
186             }
187 
188             @Override
189             public int read(byte[] b, int off, int len) {
190                 int bbuffer_len = bbuffer.length;
191                 int offlen = off + len;
192                 byte[] bbuffer = this.bbuffer;
193                 while (off < offlen)
194                     if (available() == 0)
195                         fillBuffer();
196                     else {
197                         int bbuffer_pos = this.bbuffer_pos;
198                         while (off < offlen && bbuffer_pos < bbuffer_len)
199                             b[off++] = bbuffer[bbuffer_pos++];
200                         this.bbuffer_pos = bbuffer_pos;
201                     }
202                 return len;
203             }
204 
205             @Override
206             public int read() throws IOException {
207                 int ret = read(single);
208                 if (ret == -1)
209                     return -1;
210                 return single[0] & 0xFF;
211             }
212 
213             @Override
214             public int available() {
215                 return bbuffer.length - bbuffer_pos;
216             }
217 
218             @Override
219             public void close() {
220                 SoftMixingMainMixer.this.mixer.close();
221             }
222 
223         };
224 
225         ais = new AudioInputStream(in, mixer.getFormat(),
226                 AudioSystem.NOT_SPECIFIED);
227 
228     }
229 
openLine(SoftMixingDataLine line)230     public void openLine(SoftMixingDataLine line) {
231         synchronized (control_mutex) {
232             openLinesList.add(line);
233             openLines = openLinesList
234                     .toArray(new SoftMixingDataLine[openLinesList.size()]);
235         }
236     }
237 
closeLine(SoftMixingDataLine line)238     public void closeLine(SoftMixingDataLine line) {
239         synchronized (control_mutex) {
240             openLinesList.remove(line);
241             openLines = openLinesList
242                     .toArray(new SoftMixingDataLine[openLinesList.size()]);
243             if (openLines.length == 0)
244                 if (mixer.implicitOpen)
245                     mixer.close();
246         }
247     }
248 
getOpenLines()249     public SoftMixingDataLine[] getOpenLines() {
250         synchronized (control_mutex) {
251             return openLines;
252         }
253     }
254 
close()255     public void close() {
256         SoftMixingDataLine[] openLines = this.openLines;
257         for (int i = 0; i < openLines.length; i++) {
258             openLines[i].close();
259         }
260     }
261 }
262