2 * 11/19/04 1.0 moved to LGPL.
4 * 29/05/01 Michael Scheerer, Fixed some C++ to Java porting bugs.
6 * 16/07/01 Michael Scheerer, Catched a bug in method
7 * read_sampledata, which causes an outOfIndexException.
9 * 12/12/99 Initial version. Adapted from javalayer.java
10 * and Subband*.java. mdm@techie.com
12 * 02/28/99 Initial version : javalayer.java by E.B
13 *-----------------------------------------------------------------------
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as published
16 * by the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *----------------------------------------------------------------------
32 * Implements decoding of MPEG Audio Layer II frames.
34 @LATTICE("L<SH,SH<H,SH*")
35 @METHODDEFAULT("OUT<V,V<SH,SH<IN,SH*,THISLOC=V,GLOBALLOC=IN")
36 class LayerIIDecoder extends LayerIDecoder implements FrameDecoder
39 public LayerIIDecoder()
44 protected void createSubbands()
46 @LOC("V,LayerIIDecoder.SH") int i;
47 if (mode == Header.SINGLE_CHANNEL)
48 for (i = 0; i < num_subbands; ++i)
49 subbands[i] = new SubbandLayer2(i);
50 else if (mode == Header.JOINT_STEREO)
52 for (i = 0; i < header.intensity_stereo_bound(); ++i)
53 subbands[i] = new SubbandLayer2Stereo(i);
54 for (; i < num_subbands; ++i)
55 subbands[i] = new SubbandLayer2IntensityStereo(i);
59 for (i = 0; i < num_subbands; ++i)
60 subbands[i] = new SubbandLayer2Stereo(i);
65 protected void readScaleFactorSelection()
67 // eom note: num_subbands is defined in LayerIDecoder so it has (THIS, LayerIDecoder) Loc
68 for (@LOC("V,LayerIIDecoder.SH") int i = 0; i < num_subbands; ++i){
69 ((SubbandLayer2)subbands[i]).read_scalefactor_selection(stream, crc);
76 * Class for layer II subbands in single channel mode.
78 @LATTICE("S<L,L<H,L<ARR,ARR<F,SN<F,GN<F,F<H,H<SH,SN*,GN*")
79 @METHODDEFAULT("OUT<V,V<SH,SH<THIS,THIS<IN,SH*,THISLOC=THIS,GLOBALLOC=IN")
80 static class SubbandLayer2 extends Subband
82 // this table contains 3 requantized samples for each legal codeword
83 // when grouped in 5 bits, i.e. 3 quantizationsteps per sample
84 @LOC("H") public static final float grouping_5bits[] = new float[]
86 -2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f,
87 0.0f, -2.0f/3.0f, -2.0f/3.0f,
88 2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f,
89 -2.0f/3.0f, 0.0f, -2.0f/3.0f,
90 0.0f, 0.0f, -2.0f/3.0f,
91 2.0f/3.0f, 0.0f, -2.0f/3.0f,
92 -2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f,
93 0.0f, 2.0f/3.0f, -2.0f/3.0f,
94 2.0f/3.0f, 2.0f/3.0f, -2.0f/3.0f,
95 -2.0f/3.0f, -2.0f/3.0f, 0.0f,
96 0.0f, -2.0f/3.0f, 0.0f,
97 2.0f/3.0f, -2.0f/3.0f, 0.0f,
98 -2.0f/3.0f, 0.0f, 0.0f,
100 2.0f/3.0f, 0.0f, 0.0f,
101 -2.0f/3.0f, 2.0f/3.0f, 0.0f,
102 0.0f, 2.0f/3.0f, 0.0f,
103 2.0f/3.0f, 2.0f/3.0f, 0.0f,
104 -2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f,
105 0.0f, -2.0f/3.0f, 2.0f/3.0f,
106 2.0f/3.0f, -2.0f/3.0f, 2.0f/3.0f,
107 -2.0f/3.0f, 0.0f, 2.0f/3.0f,
108 0.0f, 0.0f, 2.0f/3.0f,
109 2.0f/3.0f, 0.0f, 2.0f/3.0f,
110 -2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f,
111 0.0f, 2.0f/3.0f, 2.0f/3.0f,
112 2.0f/3.0f, 2.0f/3.0f, 2.0f/3.0f
115 // this table contains 3 requantized samples for each legal codeword
116 // when grouped in 7 bits, i.e. 5 quantizationsteps per sample
117 @LOC("H") public static final float grouping_7bits[] = new float[]
119 -0.8f, -0.8f, -0.8f, -0.4f, -0.8f, -0.8f, 0.0f, -0.8f, -0.8f, 0.4f, -0.8f, -0.8f, 0.8f, -0.8f, -0.8f,
120 -0.8f, -0.4f, -0.8f, -0.4f, -0.4f, -0.8f, 0.0f, -0.4f, -0.8f, 0.4f, -0.4f, -0.8f, 0.8f, -0.4f, -0.8f,
121 -0.8f, 0.0f, -0.8f, -0.4f, 0.0f, -0.8f, 0.0f, 0.0f, -0.8f, 0.4f, 0.0f, -0.8f, 0.8f, 0.0f, -0.8f,
122 -0.8f, 0.4f, -0.8f, -0.4f, 0.4f, -0.8f, 0.0f, 0.4f, -0.8f, 0.4f, 0.4f, -0.8f, 0.8f, 0.4f, -0.8f,
123 -0.8f, 0.8f, -0.8f, -0.4f, 0.8f, -0.8f, 0.0f, 0.8f, -0.8f, 0.4f, 0.8f, -0.8f, 0.8f, 0.8f, -0.8f,
124 -0.8f, -0.8f, -0.4f, -0.4f, -0.8f, -0.4f, 0.0f, -0.8f, -0.4f, 0.4f, -0.8f, -0.4f, 0.8f, -0.8f, -0.4f,
125 -0.8f, -0.4f, -0.4f, -0.4f, -0.4f, -0.4f, 0.0f, -0.4f, -0.4f, 0.4f, -0.4f, -0.4f, 0.8f, -0.4f, -0.4f,
126 -0.8f, 0.0f, -0.4f, -0.4f, 0.0f, -0.4f, 0.0f, 0.0f, -0.4f, 0.4f, 0.0f, -0.4f, 0.8f, 0.0f, -0.4f,
127 -0.8f, 0.4f, -0.4f, -0.4f, 0.4f, -0.4f, 0.0f, 0.4f, -0.4f, 0.4f, 0.4f, -0.4f, 0.8f, 0.4f, -0.4f,
128 -0.8f, 0.8f, -0.4f, -0.4f, 0.8f, -0.4f, 0.0f, 0.8f, -0.4f, 0.4f, 0.8f, -0.4f, 0.8f, 0.8f, -0.4f,
129 -0.8f, -0.8f, 0.0f, -0.4f, -0.8f, 0.0f, 0.0f, -0.8f, 0.0f, 0.4f, -0.8f, 0.0f, 0.8f, -0.8f, 0.0f,
130 -0.8f, -0.4f, 0.0f, -0.4f, -0.4f, 0.0f, 0.0f, -0.4f, 0.0f, 0.4f, -0.4f, 0.0f, 0.8f, -0.4f, 0.0f,
131 -0.8f, 0.0f, 0.0f, -0.4f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.4f, 0.0f, 0.0f, 0.8f, 0.0f, 0.0f,
132 -0.8f, 0.4f, 0.0f, -0.4f, 0.4f, 0.0f, 0.0f, 0.4f, 0.0f, 0.4f, 0.4f, 0.0f, 0.8f, 0.4f, 0.0f,
133 -0.8f, 0.8f, 0.0f, -0.4f, 0.8f, 0.0f, 0.0f, 0.8f, 0.0f, 0.4f, 0.8f, 0.0f, 0.8f, 0.8f, 0.0f,
134 -0.8f, -0.8f, 0.4f, -0.4f, -0.8f, 0.4f, 0.0f, -0.8f, 0.4f, 0.4f, -0.8f, 0.4f, 0.8f, -0.8f, 0.4f,
135 -0.8f, -0.4f, 0.4f, -0.4f, -0.4f, 0.4f, 0.0f, -0.4f, 0.4f, 0.4f, -0.4f, 0.4f, 0.8f, -0.4f, 0.4f,
136 -0.8f, 0.0f, 0.4f, -0.4f, 0.0f, 0.4f, 0.0f, 0.0f, 0.4f, 0.4f, 0.0f, 0.4f, 0.8f, 0.0f, 0.4f,
137 -0.8f, 0.4f, 0.4f, -0.4f, 0.4f, 0.4f, 0.0f, 0.4f, 0.4f, 0.4f, 0.4f, 0.4f, 0.8f, 0.4f, 0.4f,
138 -0.8f, 0.8f, 0.4f, -0.4f, 0.8f, 0.4f, 0.0f, 0.8f, 0.4f, 0.4f, 0.8f, 0.4f, 0.8f, 0.8f, 0.4f,
139 -0.8f, -0.8f, 0.8f, -0.4f, -0.8f, 0.8f, 0.0f, -0.8f, 0.8f, 0.4f, -0.8f, 0.8f, 0.8f, -0.8f, 0.8f,
140 -0.8f, -0.4f, 0.8f, -0.4f, -0.4f, 0.8f, 0.0f, -0.4f, 0.8f, 0.4f, -0.4f, 0.8f, 0.8f, -0.4f, 0.8f,
141 -0.8f, 0.0f, 0.8f, -0.4f, 0.0f, 0.8f, 0.0f, 0.0f, 0.8f, 0.4f, 0.0f, 0.8f, 0.8f, 0.0f, 0.8f,
142 -0.8f, 0.4f, 0.8f, -0.4f, 0.4f, 0.8f, 0.0f, 0.4f, 0.8f, 0.4f, 0.4f, 0.8f, 0.8f, 0.4f, 0.8f,
143 -0.8f, 0.8f, 0.8f, -0.4f, 0.8f, 0.8f, 0.0f, 0.8f, 0.8f, 0.4f, 0.8f, 0.8f, 0.8f, 0.8f, 0.8f
146 // this table contains 3 requantized samples for each legal codeword
147 // when grouped in 10 bits, i.e. 9 quantizationsteps per sample
148 @LOC("H") public static final float grouping_10bits[] =
150 -8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
151 -2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 0.0f, -8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
152 4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
153 -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
154 -2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 0.0f, -6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
155 4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
156 -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
157 -2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 0.0f, -4.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
158 4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
159 -8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
160 -2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 0.0f, -2.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
161 4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
162 -8.0f/9.0f, 0.0f, -8.0f/9.0f, -6.0f/9.0f, 0.0f, -8.0f/9.0f, -4.0f/9.0f, 0.0f, -8.0f/9.0f,
163 -2.0f/9.0f, 0.0f, -8.0f/9.0f, 0.0f, 0.0f, -8.0f/9.0f, 2.0f/9.0f, 0.0f, -8.0f/9.0f,
164 4.0f/9.0f, 0.0f, -8.0f/9.0f, 6.0f/9.0f, 0.0f, -8.0f/9.0f, 8.0f/9.0f, 0.0f, -8.0f/9.0f,
165 -8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
166 -2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 0.0f, 2.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
167 4.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f,
168 -8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
169 -2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 0.0f, 4.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
170 4.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, -8.0f/9.0f,
171 -8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f,
172 -2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 0.0f, 6.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f,
173 4.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f,
174 -8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f,
175 -2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 0.0f, 8.0f/9.0f, -8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f,
176 4.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f,
177 -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
178 -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 0.0f, -8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
179 4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
180 -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
181 -2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 0.0f, -6.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
182 4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
183 -8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
184 -2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 0.0f, -4.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
185 4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
186 -8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
187 -2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 0.0f, -2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
188 4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
189 -8.0f/9.0f, 0.0f, -6.0f/9.0f, -6.0f/9.0f, 0.0f, -6.0f/9.0f, -4.0f/9.0f, 0.0f, -6.0f/9.0f,
190 -2.0f/9.0f, 0.0f, -6.0f/9.0f, 0.0f, 0.0f, -6.0f/9.0f, 2.0f/9.0f, 0.0f, -6.0f/9.0f,
191 4.0f/9.0f, 0.0f, -6.0f/9.0f, 6.0f/9.0f, 0.0f, -6.0f/9.0f, 8.0f/9.0f, 0.0f, -6.0f/9.0f,
192 -8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f,
193 -2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 0.0f, 2.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f,
194 4.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f,
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368 4.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -8.0f/9.0f, 8.0f/9.0f,
369 -8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f,
370 -2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 0.0f, -6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f,
371 4.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f,
372 -8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
373 -2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 0.0f, -4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
374 4.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f,
375 -8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
376 -2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 0.0f, -2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
377 4.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -2.0f/9.0f, 8.0f/9.0f,
378 -8.0f/9.0f, 0.0f, 8.0f/9.0f, -6.0f/9.0f, 0.0f, 8.0f/9.0f, -4.0f/9.0f, 0.0f, 8.0f/9.0f,
379 -2.0f/9.0f, 0.0f, 8.0f/9.0f, 0.0f, 0.0f, 8.0f/9.0f, 2.0f/9.0f, 0.0f, 8.0f/9.0f,
380 4.0f/9.0f, 0.0f, 8.0f/9.0f, 6.0f/9.0f, 0.0f, 8.0f/9.0f, 8.0f/9.0f, 0.0f, 8.0f/9.0f,
381 -8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
382 -2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 0.0f, 2.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
383 4.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f,
384 -8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f,
385 -2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 0.0f, 4.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f,
386 4.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 4.0f/9.0f, 8.0f/9.0f,
387 -8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f,
388 -2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 0.0f, 6.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f,
389 4.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f,
390 -8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, -4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
391 -2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 0.0f, 8.0f/9.0f, 8.0f/9.0f, 2.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f,
392 4.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 6.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f, 8.0f/9.0f
395 // data taken from ISO/IEC DIS 11172, Annexes 3-B.2[abcd] and 3-B.4:
397 // subbands 0-2 in tables 3-B.2a and 2b: (index is allocation)
398 @LOC("F") public static final int table_ab1_codelength[] =
400 { 0, 5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
402 @LOC("F") public static final float table_ab1_groupingtables[][] =
403 // pointer to sample grouping table, or NULL-pointer if ungrouped
404 { null, grouping_5bits, null, null, null, null, null, null, null, null, null, null, null, null, null, null };
406 @LOC("F") public static final float table_ab1_factor[] =
407 // factor for requantization: (real)sample * factor - 1.0 gives requantized sample
408 { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f,
409 1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f,
410 1.0f/4096.0f, 1.0f/8192.0f, 1.0f/16384.0f, 1.0f/32768.0f };
412 @LOC("F") public static final float table_ab1_c[] =
413 // factor c for requantization from table 3-B.4
414 { 0.0f, 1.33333333333f, 1.14285714286f, 1.06666666666f, 1.03225806452f,
415 1.01587301587f, 1.00787401575f, 1.00392156863f, 1.00195694716f, 1.00097751711f,
416 1.00048851979f, 1.00024420024f, 1.00012208522f, 1.00006103888f, 1.00003051851f,
419 @LOC("F") public static final float table_ab1_d[] =
420 // addend d for requantization from table 3-B.4
421 { 0.0f, 0.50000000000f, 0.25000000000f, 0.12500000000f, 0.06250000000f,
422 0.03125000000f, 0.01562500000f, 0.00781250000f, 0.00390625000f, 0.00195312500f,
423 0.00097656250f, 0.00048828125f, 0.00024414063f, 0.00012207031f, 0.00006103516f,
426 // subbands 3-... tables 3-B.2a and 2b:
427 @LOC("F") public static final float[] table_ab234_groupingtables[] =
428 { null, grouping_5bits, grouping_7bits, null, grouping_10bits, null, null, null, null, null, null, null, null, null, null, null };
430 // subbands 3-10 in tables 3-B.2a and 2b:
431 @LOC("F") public static final int table_ab2_codelength[] =
432 { 0, 5, 7, 3, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16 };
433 @LOC("F") public static final float table_ab2_factor[] =
434 { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f,
435 1.0f/32.0f, 1.0f/64.0f, 1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f,
436 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f, 1.0f/32768.0f };
437 @LOC("F") public static final float table_ab2_c[] =
438 { 0.0f, 1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f,
439 1.06666666666f, 1.03225806452f, 1.01587301587f, 1.00787401575f, 1.00392156863f,
440 1.00195694716f, 1.00097751711f, 1.00048851979f, 1.00024420024f, 1.00012208522f,
442 @LOC("F") public static final float table_ab2_d[] =
443 { 0.0f, 0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f,
444 0.12500000000f, 0.06250000000f, 0.03125000000f, 0.01562500000f, 0.00781250000f,
445 0.00390625000f, 0.00195312500f, 0.00097656250f, 0.00048828125f, 0.00024414063f,
448 // subbands 11-22 in tables 3-B.2a and 2b:
449 @LOC("F") public static final int table_ab3_codelength[] = { 0, 5, 7, 3, 10, 4, 5, 16 };
450 @LOC("F") public static final float table_ab3_factor[] =
451 { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32768.0f };
452 @LOC("F") public static final float table_ab3_c[] =
453 { 0.0f, 1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f,
454 1.06666666666f, 1.03225806452f, 1.00001525902f };
455 @LOC("F") public static final float table_ab3_d[] =
456 { 0.0f, 0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f,
457 0.12500000000f, 0.06250000000f, 0.00003051758f };
459 // subbands 23-... in tables 3-B.2a and 2b:
460 @LOC("F") public static final int table_ab4_codelength[] = { 0, 5, 7, 16 };
461 @LOC("F") public static final float table_ab4_factor[] = { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/32768.0f };
462 @LOC("F") public static final float table_ab4_c[] = { 0.0f, 1.33333333333f, 1.60000000000f, 1.00001525902f };
463 @LOC("F") public static final float table_ab4_d[] = { 0.0f, 0.50000000000f, 0.50000000000f, 0.00003051758f };
465 // subbands in tables 3-B.2c and 2d:
466 @LOC("F") public static final int table_cd_codelength[] =
467 { 0, 5, 7, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
468 @LOC("F") public static final float table_cd_groupingtables[][] =
469 { null, grouping_5bits, grouping_7bits, grouping_10bits, null, null, null, null, null, null, null, null, null, null, null, null };
470 @LOC("F") public static final float table_cd_factor[] =
471 { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f,
472 1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f,
473 1.0f/8192.0f, 1.0f/16384.0f };
474 @LOC("F") public static final float table_cd_c[] =
475 { 0.0f, 1.33333333333f, 1.60000000000f, 1.77777777777f, 1.06666666666f,
476 1.03225806452f, 1.01587301587f, 1.00787401575f, 1.00392156863f, 1.00195694716f,
477 1.00097751711f, 1.00048851979f, 1.00024420024f, 1.00012208522f, 1.00006103888f,
479 @LOC("F") public static final float table_cd_d[] =
480 { 0.0f, 0.50000000000f, 0.50000000000f, 0.50000000000f, 0.12500000000f,
481 0.06250000000f, 0.03125000000f, 0.01562500000f, 0.00781250000f, 0.00390625000f,
482 0.00195312500f, 0.00097656250f, 0.00048828125f, 0.00024414063f, 0.00012207031f,
487 @LOC("F") protected int subbandnumber;
488 @LOC("F") protected int allocation;
489 @LOC("ARR") protected int scfsi;
490 @LOC("L") protected float scalefactor1;
491 @LOC("L") protected float scalefactor2;
492 @LOC("L") protected float scalefactor3;
493 @LOC("ARR") protected int[] codelength = {0};
494 @LOC("ARR") protected float groupingtable[][] = new float[2][];
495 //protected float[][] groupingtable = {{0},{0}} ;
496 @LOC("ARR") protected float[] factor = {0.0f};
497 @LOC("GN") protected int groupnumber;
498 @LOC("SN") protected int samplenumber;
499 @LOC("L") protected float[] samples = new float[3];
500 @LOC("ARR") protected float[] c = {0.0f};
501 @LOC("ARR") protected float[] d = {0.0f};
505 public SubbandLayer2(@LOC("IN") int subbandnumber)
507 this.subbandnumber = subbandnumber;
508 groupnumber = samplenumber = 0;
516 protected int get_allocationlength (@LOC("IN") Header header)
518 if (header.version() == Header.MPEG1)
520 @LOC("SH") int channel_bitrate = header.bitrate_index();
522 // calculate bitrate per channel:
523 if (header.mode() != Header.SINGLE_CHANNEL)
524 if (channel_bitrate == 4)
527 channel_bitrate -= 4;
529 if (channel_bitrate == 1 || channel_bitrate == 2)
530 // table 3-B.2c or 3-B.2d
531 if (subbandnumber <= 1)
536 // tables 3-B.2a or 3-B.2b
537 if (subbandnumber <= 10)
539 else if (subbandnumber <= 22)
545 { // MPEG-2 LSF -- Jeff
547 // table B.1 of ISO/IEC 13818-3
548 if (subbandnumber <= 3)
550 else if (subbandnumber <= 10)
560 protected void prepare_sample_reading(@LOC("IN") Header header, @LOC("IN") int allocation,
561 //float[][] groupingtable,
562 @LOC("IN") int channel,
563 @LOC("V") float[] factor, @LOC("V") int[] codelength,
564 @LOC("V") float[] c, @LOC("V") float[] d)
566 @LOC("SH")int channel_bitrate = header.bitrate_index();
567 // calculate bitrate per channel:
568 if (header.mode() != Header.SINGLE_CHANNEL)
569 if (channel_bitrate == 4)
572 channel_bitrate -= 4;
574 if (channel_bitrate == 1 || channel_bitrate == 2)
576 // table 3-B.2c or 3-B.2d
577 groupingtable[channel] = table_cd_groupingtables[allocation];
578 factor[0] = table_cd_factor[allocation];
579 codelength[0] = table_cd_codelength[allocation];
580 c[0] = table_cd_c[allocation];
581 d[0] = table_cd_d[allocation];
585 // tables 3-B.2a or 3-B.2b
586 if (subbandnumber <= 2)
588 groupingtable[channel] = table_ab1_groupingtables[allocation];
589 factor[0] = table_ab1_factor[allocation];
590 codelength[0] = table_ab1_codelength[allocation];
591 c[0] = table_ab1_c[allocation];
592 d[0] = table_ab1_d[allocation];
596 groupingtable[channel] = table_ab234_groupingtables[allocation];
597 if (subbandnumber <= 10)
599 factor[0] = table_ab2_factor[allocation];
600 codelength[0] = table_ab2_codelength[allocation];
601 c[0] = table_ab2_c[allocation];
602 d[0] = table_ab2_d[allocation];
604 else if (subbandnumber <= 22)
606 factor[0] = table_ab3_factor[allocation];
607 codelength[0] = table_ab3_codelength[allocation];
608 c[0] = table_ab3_c[allocation];
609 d[0] = table_ab3_d[allocation];
613 factor[0] = table_ab4_factor[allocation];
614 codelength[0] = table_ab4_codelength[allocation];
615 c[0] = table_ab4_c[allocation];
616 d[0] = table_ab4_d[allocation];
626 @LATTICE("OUT<V,V<SH,SH<IN,SH*,THISLOC=OUT,GLOBALLOC=IN")
627 public void read_allocation(@LOC("IN") Bitstream stream, @LOC("IN") Header header, @LOC("IN") Crc16 crc)
629 @LOC("V") int length = get_allocationlength(header);
630 allocation = stream.get_bits(length);
632 crc.add_bits(allocation, length);
638 public void read_scalefactor_selection (@LOC("IN") Bitstream stream, @LOC("IN") Crc16 crc)
642 scfsi = stream.get_bits(2);
643 if (crc != null) crc.add_bits(scfsi, 2);
650 public void read_scalefactor (@LOC("IN") Bitstream stream, @LOC("IN") Header header)
657 scalefactor1 = scalefactors[stream.get_bits(6)];
658 scalefactor2 = scalefactors[stream.get_bits(6)];
659 scalefactor3 = scalefactors[stream.get_bits(6)];
662 scalefactor1 = scalefactor2 = scalefactors[stream.get_bits(6)];
663 scalefactor3 = scalefactors[stream.get_bits(6)];
666 scalefactor1 = scalefactor2 = scalefactor3 = scalefactors[stream.get_bits(6)];
669 scalefactor1 = scalefactors[stream.get_bits(6)];
670 scalefactor2 = scalefactor3 = scalefactors[stream.get_bits(6)];
673 prepare_sample_reading(header, allocation, 0,
674 factor, codelength, c, d);
681 // @LATTICE("OUT<V,V<SH,SH<TEMP,TEMP<TMP,TMP<THIS,THIS<IN,SH*,TEMP*,TMP*,THISLOC=THIS,GLOBALLOC=IN")
682 @LATTICE("OUT<V,V<TEMP,TEMP<TMP,TMP<SH,SH<THIS,THIS<IN,SH*,TEMP*,TMP*,THISLOC=THIS,GLOBALLOC=IN")
684 public boolean read_sampledata (@LOC("IN") Bitstream stream)
687 if (groupingtable[0] != null)
689 @LOC("SH") int samplecode = stream.get_bits(codelength[0]);
690 // create requantized samples:
691 samplecode += samplecode << 1;
692 //float[] target = samples; //subbed in variable to reduce areas
693 //float[] source = groupingtable[0]; //subbed in variable to reduce areas
697 target[tmp++] = source[samplecode + temp];
699 target[tmp++] = source[samplecode + temp];
701 target[tmp] = source[samplecode + temp];
704 @LOC("TMP") int tmp = 0;
705 @LOC("TEMP") int temp = samplecode;
707 // if(temp > source.length - 3) temp = source.length - 3;
708 if(temp > groupingtable[0].length - 3) temp = groupingtable[0].length - 3;
710 samples[tmp] = groupingtable[0][temp];
712 samples[tmp] = groupingtable[0][temp];
714 samples[tmp] = groupingtable[0][temp];
716 // memcpy (samples, groupingtable + samplecode, 3 * sizeof (real));
720 samples[0] = (float) ((stream.get_bits(codelength[0])) * factor[0] - 1.0);
721 samples[1] = (float) ((stream.get_bits(codelength[0])) * factor[0] - 1.0);
722 samples[2] = (float) ((stream.get_bits(codelength[0])) * factor[0] - 1.0);
726 if (++groupnumber == 12)
736 public boolean put_next_sample(@LOC("IN") int channels, @LOC("IN") SynthesisFilter filter1, @LOC("IN") SynthesisFilter filter2)
738 if ((allocation != 0) && (channels != OutputChannels.RIGHT_CHANNEL))
740 @LOC("SH") float sample = samples[samplenumber];
742 if (groupingtable[0] == null)
743 sample = (sample + d[0]) * c[0];
744 if (groupnumber <= 4)
745 sample *= scalefactor1;
746 else if (groupnumber <= 8)
747 sample *= scalefactor2;
749 sample *= scalefactor3;
750 filter1.input_sample(sample, subbandnumber);
753 if (++samplenumber == 3)
761 * Class for layer II subbands in joint stereo mode.
763 @LATTICE("S<L,L<H,L<ARR,ARR<F,SN<F,GN<F,F<H,H<SH,SN*,GN*,L*")
764 @METHODDEFAULT("OUT<V,V<SH,SH<THIS,THIS<IN,SH*,THISLOC=THIS,GLOBALLOC=IN")
765 static class SubbandLayer2IntensityStereo extends SubbandLayer2
767 @LOC("ARR") protected int channel2_scfsi;
768 @LOC("L") protected float channel2_scalefactor1;
769 @LOC("L") protected float channel2_scalefactor2;
770 @LOC("L") protected float channel2_scalefactor3;
775 public SubbandLayer2IntensityStereo (@LOC("IN") int subbandnumber)
777 super(subbandnumber);
783 public void read_allocation(@LOC("IN") Bitstream stream, @LOC("IN") Header header, @LOC("IN") Crc16 crc)
785 super.read_allocation (stream, header, crc);
791 public void read_scalefactor_selection(@LOC("IN") Bitstream stream, @LOC("IN") Crc16 crc)
795 scfsi = stream.get_bits(2);
796 channel2_scfsi = stream.get_bits(2);
799 crc.add_bits(scfsi, 2);
800 crc.add_bits(channel2_scfsi, 2);
808 public void read_scalefactor(@LOC("IN") Bitstream stream, @LOC("IN") Header header)
812 super.read_scalefactor(stream, header);
813 switch (channel2_scfsi)
816 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
817 channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
818 channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
822 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
823 channel2_scalefactor2 = channel2_scalefactor1;
824 channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
828 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
829 channel2_scalefactor2 = channel2_scalefactor1;
830 channel2_scalefactor3 = channel2_scalefactor2;
834 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
835 channel2_scalefactor2 = scalefactors[stream.get_bits (6)];
836 channel2_scalefactor3 = channel2_scalefactor2;
847 public boolean read_sampledata(@LOC("IN") Bitstream stream)
849 return super.read_sampledata (stream);
855 @LATTICE("S2<S1,S1<THIS,THIS<GLOBAL,GLOBAL<IN,S1*,THISLOC=THIS,GLOBALLOC=GLOBAL")
857 public boolean put_next_sample(@LOC("IN") int channels, @LOC("IN") SynthesisFilter filter1, @LOC("IN") SynthesisFilter filter2)
861 @LOC("S1") float sample = samples[samplenumber];
863 if (groupingtable[0] == null)
864 sample = (sample + d[0]) * c[0];
865 if (channels == OutputChannels.BOTH_CHANNELS)
867 @LOC("S2") float sample2 = sample;
868 if (groupnumber <= 4)
870 sample *= scalefactor1;
871 sample2 *= channel2_scalefactor1;
873 else if (groupnumber <= 8)
875 sample *= scalefactor2;
876 sample2 *= channel2_scalefactor2;
880 sample *= scalefactor3;
881 sample2 *= channel2_scalefactor3;
883 filter1.input_sample(sample, subbandnumber);
884 filter2.input_sample(sample2, subbandnumber);
886 else if (channels == OutputChannels.LEFT_CHANNEL)
888 if (groupnumber <= 4)
889 sample *= scalefactor1;
890 else if (groupnumber <= 8)
891 sample *= scalefactor2;
893 sample *= scalefactor3;
894 filter1.input_sample(sample, subbandnumber);
898 if (groupnumber <= 4)
899 sample *= channel2_scalefactor1;
900 else if (groupnumber <= 8)
901 sample *= channel2_scalefactor2;
903 sample *= channel2_scalefactor3;
904 filter1.input_sample(sample, subbandnumber);
908 if (++samplenumber == 3)
916 * Class for layer II subbands in stereo mode.
918 @LATTICE("S<L,L<H,L<ARR,ARR<F,SN<F,GN<F,F<H,H<SH,SN*,GN*")
919 @METHODDEFAULT("OUT<V,V<SH,SH<THIS,THIS<IN,SH*,THISLOC=THIS,GLOBALLOC=IN")
920 static class SubbandLayer2Stereo extends SubbandLayer2
922 @LOC("F")protected int channel2_allocation;
923 @LOC("ARR") protected int channel2_scfsi;
924 @LOC("L") protected float channel2_scalefactor1;
925 @LOC("L") protected float channel2_scalefactor2;
926 @LOC("L") protected float channel2_scalefactor3;
927 //protected boolean channel2_grouping; ???? Never used!
928 @LOC("ARR") protected int[] channel2_codelength = {0};
929 //protected float[][] channel2_groupingtable = {{0},{0}};
930 @LOC("ARR") protected float[] channel2_factor = {0.0f};
931 @LOC("L") protected float[] channel2_samples;
932 @LOC("ARR") protected float[] channel2_c = {0.0f};
933 @LOC("ARR") protected float[] channel2_d = {0.0f};
938 public SubbandLayer2Stereo(@LOC("IN") int subbandnumber)
940 super(subbandnumber);
941 channel2_samples = new float[3];
947 @LATTICE("OUT<SH,SH<THIS,THIS<V,V<IN,SH*,THISLOC=THIS,GLOBALLOC=IN")
948 public void read_allocation(@LOC("IN") Bitstream stream, @LOC("IN") Header header, @LOC("IN") Crc16 crc)
950 @LOC("V") int length = get_allocationlength(header);
951 allocation = stream.get_bits(length);
952 channel2_allocation = stream.get_bits(length);
955 crc.add_bits(allocation, length);
956 crc.add_bits(channel2_allocation, length);
963 public void read_scalefactor_selection(@LOC("IN") Bitstream stream, @LOC("IN") Crc16 crc)
967 scfsi = stream.get_bits(2);
969 crc.add_bits(scfsi, 2);
971 if (channel2_allocation != 0)
973 channel2_scfsi = stream.get_bits(2);
975 crc.add_bits(channel2_scfsi, 2);
982 public void read_scalefactor(@LOC("IN") Bitstream stream, @LOC("IN") Header header)
984 super.read_scalefactor(stream, header);
985 if (channel2_allocation != 0)
987 switch (channel2_scfsi)
990 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
991 channel2_scalefactor2 = scalefactors[stream.get_bits(6)];
992 channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
996 channel2_scalefactor1 = channel2_scalefactor2 =
997 scalefactors[stream.get_bits(6)];
998 channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
1002 channel2_scalefactor1 = channel2_scalefactor2 =
1003 channel2_scalefactor3 = scalefactors[stream.get_bits(6)];
1007 channel2_scalefactor1 = scalefactors[stream.get_bits(6)];
1008 channel2_scalefactor2 = channel2_scalefactor3 =
1009 scalefactors[stream.get_bits(6)];
1012 prepare_sample_reading(header, channel2_allocation, 1,
1013 channel2_factor, channel2_codelength, channel2_c,
1021 @LATTICE("OUT<V,V<TEMP,TEMP<SH,TEMP<TMP,TMP<THIS,THIS<IN,SH*,TEMP*,TMP*,THISLOC=THIS,GLOBALLOC=IN")
1023 public boolean read_sampledata (@LOC("IN") Bitstream stream)
1025 @LOC("V")boolean returnvalue = super.read_sampledata(stream);
1027 if (channel2_allocation != 0)
1028 if (groupingtable[1] != null)
1030 @LOC("SH") int samplecode = stream.get_bits(channel2_codelength[0]);
1031 // create requantized samples:
1032 samplecode += samplecode << 1;
1034 float[] target = channel2_samples;
1035 float[] source = channel2_groupingtable[0];
1038 target[tmp++] = source[samplecode + temp];
1040 target[tmp++] = source[samplecode + temp];
1042 target[tmp] = source[samplecode + temp];
1043 // memcpy (channel2_samples, channel2_groupingtable + samplecode, 3 * sizeof (real));
1045 @LOC("V") float[] target = channel2_samples;
1046 @LOC("V") float[] source = groupingtable[1];
1047 @LOC("TMP") int tmp = 0;
1048 @LOC("TEMP") int temp = samplecode;
1049 target[tmp] = source[temp];
1051 target[tmp] = source[temp];
1053 target[tmp] = source[temp];
1058 channel2_samples[0] = (float) ((stream.get_bits(channel2_codelength[0])) *
1059 channel2_factor[0] - 1.0);
1060 channel2_samples[1] = (float) ((stream.get_bits(channel2_codelength[0])) *
1061 channel2_factor[0] - 1.0);
1062 channel2_samples[2] = (float) ((stream.get_bits(channel2_codelength[0])) *
1063 channel2_factor[0] - 1.0);
1072 public boolean put_next_sample(@LOC("IN") int channels, @LOC("IN") SynthesisFilter filter1, @LOC("IN") SynthesisFilter filter2)
1074 @LOC("V") boolean returnvalue = super.put_next_sample(channels, filter1, filter2);
1075 if ((channel2_allocation != 0) && (channels != OutputChannels.LEFT_CHANNEL))
1077 @LOC("SH") float sample = channel2_samples[samplenumber - 1];
1079 if (groupingtable[1] == null)
1080 sample = (sample + channel2_d[0]) * channel2_c[0];
1082 if (groupnumber <= 4)
1083 sample *= channel2_scalefactor1;
1084 else if (groupnumber <= 8)
1085 sample *= channel2_scalefactor2;
1087 sample *= channel2_scalefactor3;
1088 if (channels == OutputChannels.BOTH_CHANNELS)
1089 filter2.input_sample(sample, subbandnumber);
1091 filter1.input_sample(sample, subbandnumber);