files_private.h

linux下的MPEG1

/*
    $Id: files_private.h,v 1.3 2006/09/26 21:16:59 dgp85 Exp $

    Copyright (C) 2000 Herbert Valerio Riedel <[e-mail]>
              (C) 2000 Jens B. Jorgensen <[e-mail]>

    This program 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.

    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 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
*/

#ifndef __VCD_FILES_PRIVATE_H__
#define __VCD_FILES_PRIVATE_H__

#include <libvcd/files.h>
#include <libvcd/types.h>

/* random note: most stuff is big endian here */

#define ENTRIES_ID_VCD  "ENTRYVCD"
#define ENTRIES_ID_VCD3 "ENTRYSVD"
#define ENTRIES_ID_SVCD "ENTRYVCD" /* not ENTRYSVD! */

#define ENTRIES_VERSION_VCD   0x01
#define ENTRIES_SPTAG_VCD     0x00   

#define ENTRIES_VERSION_VCD11 0x01
#define ENTRIES_SPTAG_VCD11   0x00   

#define ENTRIES_VERSION_VCD2  0x02
#define ENTRIES_SPTAG_VCD2    0x00

#define ENTRIES_VERSION_SVCD  0x01
#define ENTRIES_SPTAG_SVCD    0x00

#define ENTRIES_VERSION_HQVCD 0x01
#define ENTRIES_SPTAG_HQVCD   0x00

PRAGMA_BEGIN_PACKED

typedef struct _EntriesVcd_tag {
  char ID[8];                             /* "ENTRYVCD" */
  uint8_t version;                        /* 0x02 --- VCD2.0
                                             0x01 --- SVCD, should be
                                             same as version in
                                             INFO.SVD */
  uint8_t sys_prof_tag;                   /* 0x01 if VCD1.1
                                             0x00 else */
  uint16_t entry_count;                   /* 1 <= tracks <= 500 */
  struct {     /* all fields are BCD */
    uint8_t n; /* cd track no 2 <= n <= 99 */
    msf_t msf;
  } GNUC_PACKED entry[MAX_ENTRIES];
  uint8_t reserved2[36];                  /* RESERVED, must be 0x00 */
} GNUC_PACKED _EntriesVcd; /* sector 00:04:01 */

#define EntriesVcd_SIZEOF ISO_BLOCKSIZE


#define INFO_ID_VCD   "VIDEO_CD"
#define INFO_ID_SVCD  "SUPERVCD"
#define INFO_ID_HQVCD "HQ-VCD  "

#define INFO_VERSION_VCD   0x01
#define INFO_SPTAG_VCD     0x00   

#define INFO_VERSION_VCD11 0x01
#define INFO_SPTAG_VCD11   0x01   

#define INFO_VERSION_VCD2  0x02
#define INFO_SPTAG_VCD2    0x00   

#define INFO_VERSION_SVCD  0x01
#define INFO_SPTAG_SVCD    0x00

#define INFO_VERSION_HQVCD 0x01
#define INFO_SPTAG_HQVCD   0x01

#define INFO_OFFSET_MULT   0x08

/* This one-byte field describes certain characteristics of the disc */
typedef struct {
#if defined(BITFIELD_LSBF)
  bool       reserved1 : 1;                   /* Reserved, must be zero */
  bitfield_t restriction : 2;                 /* restriction, eg. "unsuitable
                                              for kids":
                                              0x0 ==> unrestricted,
                                              0x1 ==> restricted category 1,
                                              0x2 ==> restricted category 2,
                                              0x3 ==> restricted category 3 */
  bool       special_info : 1;                /* Special Information is encoded 
                                              in the pictures */
  bool       user_data_cc : 1;                /* MPEG User Data is used
                                              for Closed Caption */
  bool       use_lid2 : 1;                    /* If == 1 and the PSD is
                                              interpreted and the next
                                              disc has the same album
                                              id then start the next
                                              disc at List ID #2,
                                              otherwise List ID #1 */ 
  bool       use_track3 : 1;                  /* If == 1 and the PSD is
                                              not interpreted  and
                                              next disc has same album
                                              id, then start next disc
                                              with track 3, otherwise
                                              start with track 2 */ 
  bool       pbc_x : 1;                       /* extended PBC available */
#else
  bool       pbc_x : 1;
  bool       use_track3 : 1;
  bool       use_lid2 : 1;
  bool       user_data_cc : 1;
  bool       special_info : 1;
  bitfield_t restriction : 2;
  bool       reserved1 : 1;
#endif
} GNUC_PACKED InfoStatusFlags;

#define InfoStatusFlags_SIZEOF 1

enum {
  VCD_FILES_VIDEO_NOSTREAM = 0,
  VCD_FILES_VIDEO_NTSC_STILL = 1,
  VCD_FILES_VIDEO_NTSC_STILL2 = 2,
  VCD_FILES_VIDEO_NTSC_MOTION = 3,
  VCD_FILES_VIDEO_PAL_STILL = 5,
  VCD_FILES_VIDEO_PAL_STILL2 = 6,
  VCD_FILES_VIDEO_PAL_MOTION = 7
};

typedef struct 
{
#if defined(BITFIELD_LSBF)
  bitfield_t audio_type : 2;                /* Audio characteristics:
                                            0x0 - No MPEG audio stream
                                            0x1 - One MPEG1 or MPEG2 audio
                                                  stream without extension
                                            0x2 - Two MPEG1 or MPEG2 audio
                                                  streams without extension
                                            0x3 - One MPEG2 multi-channel 
                                                    audio stream w/ extension*/
  bitfield_t video_type : 3;                /* Video characteristics:
                                            0x0 - No MPEG video data
                                            0x1 - NTSC still picture
                                            0x2 - Reserved (NTSC hires?)
                                            0x3 - NTSC motion picture
                                            0x4 - Reserved
                                            0x5 - PAL still picture
                                            0x6 - Reserved (PAL hires?)
                                            0x7 - PAL motion picture */
  bool       item_cont : 1;                 /* Indicates segment is continuation
                                            0x0 - 1st or only segment of item
                                            0x1 - 2nd or later
                                                  segment of item */
  bitfield_t ogt : 2;                       /* 0x0 - no OGT substream 
                                            0x1 - sub-stream 0 available
                                            0x2 - sub-stream 0 & 1 available
                                            0x3 - all OGT sub-substreams 
                                                  available */
#else
  bitfield_t ogt : 2;
  bool       item_cont : 1;
  bitfield_t video_type : 3;
  bitfield_t audio_type : 2;
#endif
} GNUC_PACKED InfoSpiContents;

#define InfoSpiContents_SIZEOF 1

typedef struct _InfoVcd_tag {
  char   ID[8];              /* const "VIDEO_CD" for
                                VCD, "SUPERVCD" or
                                "HQ-VCD  " for SVCD */
  uint8_t version;           /* 0x02 -- VCD2.0,
                                0x01 for SVCD and VCD1.x */ 
  uint8_t sys_prof_tag;      /* System Profile Tag, used
                                to define the set of
                                mandatory parts to be
                                applied for compatibility;
                                0x00 for "SUPERVCD",
                                0x01 for "HQ-VCD  ",
                                0x0n for VCDx.n */ 
  char album_desc[16];       /* album identification/desc. */
  uint16_t vol_count;        /* number of volumes in album */
  uint16_t vol_id;           /* number id of this volume in album */
  uint8_t  pal_flags[13];    /* bitset of 98 PAL(=set)/NTSC flags */
  InfoStatusFlags flags;     /* status flags bit field */
  uint32_t psd_size;         /* size of PSD.VCD file */
  msf_t    first_seg_addr;   /* first segment addresses,
                                coded BCD The location
                                of the first sector of
                                the Segment Play Item
                                Area, in the form
                                mm:ss:00. Must be
                                00:00:00 if the PSD size
                                is 0. */
  uint8_t  offset_mult;      /* offset multiplier, must be 8 */
  uint16_t lot_entries;      /* offsets in lot */
  uint16_t item_count;       /* segments used for segmentitems */
  InfoSpiContents spi_contents[MAX_SEGMENTS]; /* The next 1980 bytes
                                contain one byte for each possible
                                segment play item. Each byte indicates
                                contents. */

  uint16_t playing_time[5];  /* in seconds */
  char reserved[2];          /* Reserved, must be zero */
} GNUC_PACKED _InfoVcd;

#define InfoVcd_SIZEOF ISO_BLOCKSIZE

/* LOT.VCD
   This optional file is only necessary if the PSD size is not zero.
   This List ID Offset Table allows you to start playing the PSD from
   lists other than the default List ID number. This table has a fixed length
   of 32 sectors and maps List ID numbers into List Offsets. It's got
   an entry for each List ID Number with the 16-bit offset. Note that
   List ID 1 has an offset of 0x0000. All unused or non-user-accessible
   entries must be 0xffff. */

#define LOT_VCD_OFFSETS ((1 << 15)-1)

typedef struct _LotVcd_tag {
  uint16_t reserved;  /* Reserved, must be zero */
  uint16_t offset[LOT_VCD_OFFSETS];  /* offset given in 8 byte units */
} GNUC_PACKED _LotVcd;

#define LotVcd_SIZEOF (32*ISO_BLOCKSIZE)

/* PSD.VCD
   The PSD controls the "user interaction" mode which can be used to make
   menus, etc. The PSD contains a set of Lists. Each List defines a set of
   Items which are played in sequence. An Item can be an mpeg track (in whole
   or part) or a Segment Play Item which can subsequently be mpeg video
   with or without audio, one more more mpeg still pictures (with or without
   audio) or mpeg audio only.

   The Selection List defines the action to be taken in response to a set
   of defined user actions: Next, Previous, Default Select, Numeric, Return.

   The End List terminates the control flow or switches to the next
   disc volume.

   Each list has a unique list id number. The first must be 1, the others can
   be anything (up to 32767).

   References to PSD list addresses are expressed as an offset into the PSD
   file. The offset indicated in the file must be multiplied by the Offset
   Multiplier found in the info file (although this seems to always have to
   be 8). Unused areas are filled with zeros. List ID 1 starts at offset 0.
*/

/* ...difficult to represent as monolithic C struct... */

typedef struct {
  uint8_t  type;        /* PSD_TYPE_END_LIST */
  uint8_t  next_disc;   /* 0x00 to stop PBC or 0xnn to switch to disc no nn */
  uint16_t change_pic;  /* 0 or 1000..2979, should be still image */
  uint8_t  reserved[4]; /* padded with 0x00 */
} GNUC_PACKED PsdEndListDescriptor;

#define PsdEndListDescriptor_SIZEOF 8

typedef struct {
#if defined(BITFIELD_LSBF)
  bool       SelectionAreaFlag : 1;
  bool       CommandListFlag : 1;
  bitfield_t reserved : 6;
#else
  bitfield_t reserved : 6;
  bool       CommandListFlag : 1;
  bool       SelectionAreaFlag : 1;