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Diffstat (limited to 'songdbj/com/jcraft/jorbis/Block.java')
-rw-r--r-- | songdbj/com/jcraft/jorbis/Block.java | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/songdbj/com/jcraft/jorbis/Block.java b/songdbj/com/jcraft/jorbis/Block.java new file mode 100644 index 0000000000..8fd15f76bf --- /dev/null +++ b/songdbj/com/jcraft/jorbis/Block.java | |||
@@ -0,0 +1,188 @@ | |||
1 | /* JOrbis | ||
2 | * Copyright (C) 2000 ymnk, JCraft,Inc. | ||
3 | * | ||
4 | * Written by: 2000 ymnk<ymnk@jcraft.com> | ||
5 | * | ||
6 | * Many thanks to | ||
7 | * Monty <monty@xiph.org> and | ||
8 | * The XIPHOPHORUS Company http://www.xiph.org/ . | ||
9 | * JOrbis has been based on their awesome works, Vorbis codec. | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or | ||
12 | * modify it under the terms of the GNU Library General Public License | ||
13 | * as published by the Free Software Foundation; either version 2 of | ||
14 | * the License, or (at your option) any later version. | ||
15 | |||
16 | * This program is distributed in the hope that it will be useful, | ||
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 | * GNU Library General Public License for more details. | ||
20 | * | ||
21 | * You should have received a copy of the GNU Library General Public | ||
22 | * License along with this program; if not, write to the Free Software | ||
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
24 | */ | ||
25 | |||
26 | package com.jcraft.jorbis; | ||
27 | |||
28 | import com.jcraft.jogg.*; | ||
29 | |||
30 | public class Block{ | ||
31 | ///necessary stream state for linking to the framing abstraction | ||
32 | float[][] pcm=new float[0][]; // this is a pointer into local storage | ||
33 | Buffer opb=new Buffer(); | ||
34 | |||
35 | int lW; | ||
36 | int W; | ||
37 | int nW; | ||
38 | int pcmend; | ||
39 | int mode; | ||
40 | |||
41 | int eofflag; | ||
42 | long granulepos; | ||
43 | long sequence; | ||
44 | DspState vd; // For read-only access of configuration | ||
45 | |||
46 | // local storage to avoid remallocing; it's up to the mapping to | ||
47 | // structure it | ||
48 | //byte[] localstore; | ||
49 | //int localtop; | ||
50 | //int localalloc; | ||
51 | //int totaluse; | ||
52 | //AllocChain reap; | ||
53 | |||
54 | // bitmetrics for the frame | ||
55 | int glue_bits; | ||
56 | int time_bits; | ||
57 | int floor_bits; | ||
58 | int res_bits; | ||
59 | |||
60 | public Block(DspState vd){ | ||
61 | this.vd=vd; | ||
62 | // localalloc=0; | ||
63 | // localstore=null; | ||
64 | if(vd.analysisp!=0){ | ||
65 | opb.writeinit(); | ||
66 | } | ||
67 | } | ||
68 | |||
69 | public void init(DspState vd){ | ||
70 | this.vd=vd; | ||
71 | } | ||
72 | |||
73 | // int alloc(int bytes){ | ||
74 | // bytes=(bytes+(8-1))&(~(8-1)); | ||
75 | // if(bytes+localtop>localalloc){ | ||
76 | // if(localstore!=null){ | ||
77 | // AllocChain link=new AllocChain(); | ||
78 | // totaluse+=localtop; | ||
79 | // link.next=reap; | ||
80 | // link.ptr=localstore; | ||
81 | // reap=link; | ||
82 | // } | ||
83 | // // highly conservative | ||
84 | // localalloc=bytes; | ||
85 | // localstore=new byte[localalloc]; | ||
86 | // localtop=0; | ||
87 | // } | ||
88 | // { | ||
89 | // int foo=localtop; | ||
90 | // //void *ret=(void *)(((char *)vb->localstore)+vb->localtop); | ||
91 | // localtop+=bytes; | ||
92 | // return foo; | ||
93 | // } | ||
94 | // } | ||
95 | |||
96 | // reap the chain, pull the ripcord | ||
97 | // void ripcord(){ | ||
98 | // // reap the chain | ||
99 | // while(reap!=null){ | ||
100 | // AllocChain next=reap.next; | ||
101 | // //free(reap->ptr); | ||
102 | // reap.ptr=null; | ||
103 | // //memset(reap,0,sizeof(struct alloc_chain)); | ||
104 | // //free(reap); | ||
105 | // reap=next; | ||
106 | // } | ||
107 | // // consolidate storage | ||
108 | // if(totaluse!=0){ | ||
109 | // //vb->localstore=realloc(vb->localstore,vb->totaluse+vb->localalloc); | ||
110 | // byte[] foo=new byte[totaluse+localalloc]; | ||
111 | // System.arraycopy(localstore, 0, foo, 0, localstore.length); | ||
112 | // localstore=foo; | ||
113 | // localalloc+=totaluse; | ||
114 | // totaluse=0; | ||
115 | // } | ||
116 | // // pull the ripcord | ||
117 | // localtop=0; | ||
118 | // reap=null; | ||
119 | // } | ||
120 | |||
121 | public int clear(){ | ||
122 | if(vd!=null){ | ||
123 | if(vd.analysisp!=0){ | ||
124 | opb.writeclear(); | ||
125 | } | ||
126 | } | ||
127 | //ripcord(); | ||
128 | //if(localstore!=null) | ||
129 | // localstore=null; | ||
130 | //memset(vb,0,sizeof(vorbis_block)); | ||
131 | return(0); | ||
132 | } | ||
133 | |||
134 | public int synthesis(Packet op){ | ||
135 | Info vi=vd.vi; | ||
136 | |||
137 | // first things first. Make sure decode is ready | ||
138 | // ripcord(); | ||
139 | opb.readinit(op.packet_base, op.packet, op.bytes); | ||
140 | |||
141 | // Check the packet type | ||
142 | if(opb.read(1)!=0){ | ||
143 | // Oops. This is not an audio data packet | ||
144 | return(-1); | ||
145 | } | ||
146 | |||
147 | // read our mode and pre/post windowsize | ||
148 | int _mode=opb.read(vd.modebits); | ||
149 | if(_mode==-1)return(-1); | ||
150 | |||
151 | mode=_mode; | ||
152 | W=vi.mode_param[mode].blockflag; | ||
153 | if(W!=0){ | ||
154 | lW=opb.read(1); | ||
155 | nW=opb.read(1); | ||
156 | if(nW==-1) return(-1); | ||
157 | } | ||
158 | else{ | ||
159 | lW=0; | ||
160 | nW=0; | ||
161 | } | ||
162 | |||
163 | // more setup | ||
164 | granulepos=op.granulepos; | ||
165 | sequence=op.packetno-3; // first block is third packet | ||
166 | eofflag=op.e_o_s; | ||
167 | |||
168 | // alloc pcm passback storage | ||
169 | pcmend=vi.blocksizes[W]; | ||
170 | //pcm=alloc(vi.channels); | ||
171 | if(pcm.length<vi.channels){ | ||
172 | pcm=new float[vi.channels][]; | ||
173 | } | ||
174 | for(int i=0;i<vi.channels;i++){ | ||
175 | if(pcm[i]==null || pcm[i].length<pcmend){ | ||
176 | pcm[i]=new float[pcmend]; | ||
177 | //pcm[i]=alloc(pcmend); | ||
178 | } | ||
179 | else{ | ||
180 | for(int j=0;j<pcmend;j++){ pcm[i][j]=0; } | ||
181 | } | ||
182 | } | ||
183 | |||
184 | // unpack_header enforces range checking | ||
185 | int type=vi.map_type[vi.mode_param[mode].mapping]; | ||
186 | return(FuncMapping.mapping_P[type].inverse(this, vd.mode[mode])); | ||
187 | } | ||
188 | } | ||