Choggbuster is a set of python scripts aimed at automated preprocessing of video DVDs for archival and filtering
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/*
* Copyright (C) 2001 Rich Wareham <richwareham@users.sourceforge.net>
*
* This file is part of libdvdnav, a DVD navigation library.
*
* 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 libdvdnav; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* This header defines events and event types
*/
/*
* DVDNAV_BLOCK_OK
*
* A regular data block from the DVD has been returned.
* This one should be demuxed and decoded for playback.
*/
#define DVDNAV_BLOCK_OK 0
/*
* DVDNAV_NOP
*
* Just ignore this.
*/
#define DVDNAV_NOP 1
/*
* DVDNAV_STILL_FRAME
*
* We have reached a still frame. The player application should wait
* the amount of time specified by the still's length while still handling
* user input to make menus and other interactive stills work.
* The last delivered frame should be kept showing.
* Once the still has timed out, call dvdnav_skip_still().
* A length of 0xff means an infinite still which has to be skipped
* indirectly by some user interaction.
*/
#define DVDNAV_STILL_FRAME 2
typedef struct {
/* The length (in seconds) the still frame should be displayed for,
* or 0xff if infinite. */
int length;
} dvdnav_still_event_t;
/*
* DVDNAV_SPU_STREAM_CHANGE
*
* Inform the SPU decoding/overlaying engine to switch SPU channels.
*/
#define DVDNAV_SPU_STREAM_CHANGE 3
typedef struct {
/* The physical (MPEG) stream number for widescreen SPU display.
* Use this, if you blend the SPU on an anamorphic image before
* unsqueezing it. */
int physical_wide;
/* The physical (MPEG) stream number for letterboxed display.
* Use this, if you blend the SPU on an anamorphic image after
* unsqueezing it. */
int physical_letterbox;
/* The physical (MPEG) stream number for pan&scan display.
* Use this, if you blend the SPU on an anamorphic image after
* unsqueezing it the pan&scan way. */
int physical_pan_scan;
/* The logical (DVD) stream number. */
int logical;
} dvdnav_spu_stream_change_event_t;
/*
* DVDNAV_AUDIO_STREAM_CHANGE
*
* Inform the audio decoder to switch channels.
*/
#define DVDNAV_AUDIO_STREAM_CHANGE 4
typedef struct {
/* The physical (MPEG) stream number. */
int physical;
/* The logical (DVD) stream number. */
int logical;
} dvdnav_audio_stream_change_event_t;
/*
* DVDNAV_VTS_CHANGE
*
* Some status information like video aspect and video scale permissions do
* not change inside a VTS. Therefore this event can be used to query such
* information only when necessary and update the decoding/displaying
* accordingly.
*/
#define DVDNAV_VTS_CHANGE 5
typedef struct {
int old_vtsN; /* the old VTS number */
DVDDomain_t old_domain; /* the old domain */
int new_vtsN; /* the new VTS number */
DVDDomain_t new_domain; /* the new domain */
} dvdnav_vts_change_event_t;
/*
* DVDNAV_CELL_CHANGE
*
* Some status information like the current Title and Part numbers do not
* change inside a cell. Therefore this event can be used to query such
* information only when necessary and update the decoding/displaying
* accordingly.
* Some useful information for accurate time display is also reported
* together with this event.
*/
#define DVDNAV_CELL_CHANGE 6
typedef struct {
int cellN; /* the new cell number */
int pgN; /* the current program number */
int64_t cell_length; /* the length of the current cell in sectors */
int64_t pg_length; /* the length of the current program in sectors */
int64_t pgc_length; /* the length of the current program chain in PTS ticks */
int64_t cell_start; /* the start offset of the current cell relatively to the PGC in sectors */
int64_t pg_start; /* the start offset of the current PG relatively to the PGC in sectors */
} dvdnav_cell_change_event_t;
/*
* DVDNAV_NAV_PACKET
*
* NAV packets are useful for various purposes. They define the button
* highlight areas and VM commands of DVD menus, so they should in any
* case be sent to the SPU decoder/overlaying engine for the menus to work.
* NAV packets also provide a way to detect PTS discontinuities, because
* they carry the start and end PTS values for the current VOBU.
* (pci.vobu_s_ptm and pci.vobu_e_ptm) Whenever the start PTS of the
* current NAV does not match the end PTS of the previous NAV, a PTS
* discontinuity has occured.
* NAV packets can also be used for time display, because they are
* timestamped relatively to the current Cell.
*/
#define DVDNAV_NAV_PACKET 7
/*
* DVDNAV_STOP
*
* Applications should end playback here. A subsequent dvdnav_get_next_block()
* call will restart the VM from the beginning of the DVD.
*/
#define DVDNAV_STOP 8
/*
* DVDNAV_HIGHLIGHT
*
* The current button highlight changed. Inform the overlaying engine to
* highlight a different button. Please note, that at the moment only mode 1
* highlights are reported this way. That means, when the button highlight
* has been moved around by some function call, you will receive an event
* telling you the new button. But when a button gets activated, you have
* to handle the mode 2 highlighting (that is some different colour the
* button turns to on activation) in your application.
*/
#define DVDNAV_HIGHLIGHT 9
typedef struct {
/* highlight mode: 0 - hide, 1 - show, 2 - activate, currently always 1 */
int display;
/* FIXME: these fields are currently not set */
uint32_t palette; /* The CLUT entries for the highlight palette
(4-bits per entry -> 4 entries) */
uint16_t sx,sy,ex,ey; /* The start/end x,y positions */
uint32_t pts; /* Highlight PTS to match with SPU */
/* button number for the SPU decoder/overlaying engine */
uint32_t buttonN;
} dvdnav_highlight_event_t;
/*
* DVDNAV_SPU_CLUT_CHANGE
*
* Inform the SPU decoder/overlaying engine to update its colour lookup table.
* The CLUT is given as 16 uint32_t's in the buffer.
*/
#define DVDNAV_SPU_CLUT_CHANGE 10
/*
* DVDNAV_HOP_CHANNEL
*
* A non-seamless operation has been performed. Applications can drop all
* their internal fifo's content, which will speed up the response.
*/
#define DVDNAV_HOP_CHANNEL 12
/*
* DVDNAV_WAIT
*
* We have reached a point in DVD playback, where timing is critical.
* Player application with internal fifos can introduce state
* inconsistencies, because libdvdnav is always the fifo's length
* ahead in the stream compared to what the application sees.
* Such applications should wait until their fifos are empty
* when they receive this type of event.
* Once this is achieved, call dvdnav_skip_wait().
*/
#define DVDNAV_WAIT 13