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/*
* Copyright (C) 2000, 2001 Martin Norbäck, Hĺkan Hjort
*
* This file is part of libdvdnav, a DVD navigation library. It is modified
* from a file originally part of the Ogle DVD player.
*
* libdvdnav is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libdvdnav 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* $Id$
*
*/
#ifndef DECODER_H_INCLUDED
#define DECODER_H_INCLUDED
/* link command types */
typedef enum {
LinkNoLink = 0,
LinkTopC = 1,
LinkNextC = 2,
LinkPrevC = 3,
LinkTopPG = 5,
LinkNextPG = 6,
LinkPrevPG = 7,
LinkTopPGC = 9,
LinkNextPGC = 10,
LinkPrevPGC = 11,
LinkGoUpPGC = 12,
LinkTailPGC = 13,
LinkRSM = 16,
LinkPGCN,
LinkPTTN,
LinkPGN,
LinkCN,
Exit,
JumpTT, /* 22 */
JumpVTS_TT,
JumpVTS_PTT,
JumpSS_FP,
JumpSS_VMGM_MENU,
JumpSS_VTSM,
JumpSS_VMGM_PGC,
CallSS_FP, /* 29 */
CallSS_VMGM_MENU,
CallSS_VTSM,
CallSS_VMGM_PGC,
PlayThis
} link_cmd_t;
/* a link's data set */
typedef struct {
link_cmd_t command;
uint16_t data1;
uint16_t data2;
uint16_t data3;
} link_t;
/* the VM registers */
typedef struct {
uint16_t SPRM[24];
uint16_t GPRM[16];
uint8_t GPRM_mode[16]; /* Need to have some thing to indicate normal/counter mode for every GPRM */
struct timeval GPRM_time[16]; /* For counter mode */
} registers_t;
/* a VM command data set */
typedef struct {
uint64_t instruction;
uint64_t examined;
registers_t *registers;
} command_t;
/* the big VM function, executing the given commands and writing
* the link where to continue, the return value indicates if a jump
* has been performed */
int32_t vmEval_CMD(vm_cmd_t commands[], int32_t num_commands,
registers_t *registers, link_t *return_values);
/* extracts some bits from the command */
uint32_t vm_getbits(command_t* command, int32_t start, int32_t count);
#ifdef TRACE
/* for debugging: prints a link in readable form */
void vm_print_link(link_t value);
/* for debugging: dumps VM registers */
void vm_print_registers( registers_t *registers );
#endif
#endif /* DECODER_H_INCLUDED */

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