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Vorbis SPI support. Combination of JOrbis, JavaSPI and Tritonus-Share.
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/* JOrbis
* Copyright (C) 2000 ymnk, JCraft,Inc.
*
* Written by: 2000 ymnk
*
* Many thanks to
* Monty and
* The XIPHOPHORUS Company http://www.xiph.org/ .
* JOrbis has been based on their awesome works, Vorbis codec.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.github.trilarion.jcraft.jorbis;
import com.github.trilarion.jcraft.jogg.Buffer;
import com.github.trilarion.jcraft.jogg.Packet;
public class Info{
private static final int OV_EBADPACKET=-136;
private static final int OV_ENOTAUDIO=-135;
private static byte[] _vorbis="vorbis".getBytes();
private static final int VI_TIMEB=1;
// private static final int VI_FLOORB=1;
private static final int VI_FLOORB=2;
// private static final int VI_RESB=1;
private static final int VI_RESB=3;
private static final int VI_MAPB=1;
private static final int VI_WINDOWB=1;
public int version;
public int channels;
public int rate;
// The below bitrate declarations are *hints*.
// Combinations of the three values carry the following implications:
//
// all three set to the same value:
// implies a fixed rate bitstream
// only nominal set:
// implies a VBR stream that averages the nominal bitrate. No hard
// upper/lower limit
// upper and or lower set:
// implies a VBR bitstream that obeys the bitrate limits. nominal
// may also be set to give a nominal rate.
// none set:
// the coder does not care to speculate.
int bitrate_upper;
int bitrate_nominal;
int bitrate_lower;
// Vorbis supports only short and long blocks, but allows the
// encoder to choose the sizes
int[] blocksizes=new int[2];
// modes are the primary means of supporting on-the-fly different
// blocksizes, different channel mappings (LR or mid-side),
// different residue backends, etc. Each mode consists of a
// blocksize flag and a mapping (along with the mapping setup
int modes;
int maps;
int times;
int floors;
int residues;
int books;
int psys; // encode only
InfoMode[] mode_param=null;
int[] map_type=null;
Object[] map_param=null;
int[] time_type=null;
Object[] time_param=null;
int[] floor_type=null;
Object[] floor_param=null;
int[] residue_type=null;
Object[] residue_param=null;
StaticCodeBook[] book_param=null;
PsyInfo[] psy_param=new PsyInfo[64]; // encode only
// for block long/sort tuning; encode only
int envelopesa;
float preecho_thresh;
float preecho_clamp;
// used by synthesis, which has a full, alloced vi
public void init(){
rate=0;
}
public void clear(){
for(int i=0; ibook_param)free(vi->book_param);
book_param=null;
for(int i=0; i=VI_TIMEB){
clear();
return (-1);
}
time_param[i]=FuncTime.time_P[time_type[i]].unpack(this, opb);
if(time_param[i]==null){
clear();
return (-1);
}
}
// floor backend settings
floors=opb.read(6)+1;
if(floor_type==null||floor_type.length!=floors)
floor_type=new int[floors];
if(floor_param==null||floor_param.length!=floors)
floor_param=new Object[floors];
for(int i=0; i=VI_FLOORB){
clear();
return (-1);
}
floor_param[i]=FuncFloor.floor_P[floor_type[i]].unpack(this, opb);
if(floor_param[i]==null){
clear();
return (-1);
}
}
// residue backend settings
residues=opb.read(6)+1;
if(residue_type==null||residue_type.length!=residues)
residue_type=new int[residues];
if(residue_param==null||residue_param.length!=residues)
residue_param=new Object[residues];
for(int i=0; i=VI_RESB){
clear();
return (-1);
}
residue_param[i]=FuncResidue.residue_P[residue_type[i]].unpack(this, opb);
if(residue_param[i]==null){
clear();
return (-1);
}
}
// map backend settings
maps=opb.read(6)+1;
if(map_type==null||map_type.length!=maps)
map_type=new int[maps];
if(map_param==null||map_param.length!=maps)
map_param=new Object[maps];
for(int i=0; i=VI_MAPB){
clear();
return (-1);
}
map_param[i]=FuncMapping.mapping_P[map_type[i]].unpack(this, opb);
if(map_param[i]==null){
clear();
return (-1);
}
}
// mode settings
modes=opb.read(6)+1;
if(mode_param==null||mode_param.length!=modes)
mode_param=new InfoMode[modes];
for(int i=0; i=VI_WINDOWB)
||(mode_param[i].transformtype>=VI_WINDOWB)
||(mode_param[i].mapping>=maps)){
clear();
return (-1);
}
}
if(opb.read(1)!=1){
clear();
return (-1);
}
return (0);
}
// The Vorbis header is in three packets; the initial small packet in
// the first page that identifies basic parameters, a second packet
// with bitstream comments and a third packet that holds the
// codebook.
public int synthesis_headerin(Comment vc, Packet op){
Buffer opb=new Buffer();
if(op!=null){
opb.readinit(op.packet_base, op.packet, op.bytes);
// Which of the three types of header is this?
// Also verify header-ness, vorbis
{
byte[] buffer=new byte[6];
int packtype=opb.read(8);
opb.read(buffer, 6);
if(buffer[0]!='v'||buffer[1]!='o'||buffer[2]!='r'||buffer[3]!='b'
||buffer[4]!='i'||buffer[5]!='s'){
// not a vorbis header
return (-1);
}
switch(packtype){
case 0x01: // least significant *bit* is read first
if(op.b_o_s==0){
// Not the initial packet
return (-1);
}
if(rate!=0){
// previously initialized info header
return (-1);
}
return (unpack_info(opb));
case 0x03: // least significant *bit* is read first
if(rate==0){
// um... we didn't get the initial header
return (-1);
}
return (vc.unpack(opb));
case 0x05: // least significant *bit* is read first
if(rate==0||vc.vendor==null){
// um... we didn;t get the initial header or comments yet
return (-1);
}
return (unpack_books(opb));
default:
// Not a valid vorbis header type
//return(-1);
break;
}
}
}
return (-1);
}
// pack side
int pack_info(Buffer opb){
// preamble
opb.write(0x01, 8);
opb.write(_vorbis);
// basic information about the stream
opb.write(0x00, 32);
opb.write(channels, 8);
opb.write(rate, 32);
opb.write(bitrate_upper, 32);
opb.write(bitrate_nominal, 32);
opb.write(bitrate_lower, 32);
opb.write(Util.ilog2(blocksizes[0]), 4);
opb.write(Util.ilog2(blocksizes[1]), 4);
opb.write(1, 1);
return (0);
}
int pack_books(Buffer opb){
opb.write(0x05, 8);
opb.write(_vorbis);
// books
opb.write(books-1, 8);
for(int i=0; i1){
modebits++;
v>>>=1;
}
/* read our mode and pre/post windowsize */
mode=opb.read(modebits);
}
if(mode==-1)
return (OV_EBADPACKET);
return (blocksizes[mode_param[mode].blockflag]);
}
public String toString(){
return "version:"+new Integer(version)+", channels:"+new Integer(channels)
+", rate:"+new Integer(rate)+", bitrate:"+new Integer(bitrate_upper)
+","+new Integer(bitrate_nominal)+","+new Integer(bitrate_lower);
}
}
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