/usr/include/mjpegtools/liblavplay.h is in libmjpegtools-dev 1:2.1.0+debian-2.1.
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* liblavplay - a librarified Linux Audio Video PLAYback
*
* Copyright (C) 2000 Rainer Johanni <Rainer@Johanni.de>
* Extended by: Gernot Ziegler <gz@lysator.liu.se>
* Ronald Bultje <rbultje@ronald.bitfreak.net>
* & many others
*
* A library for playing back MJPEG video via software MJPEG
* decompression (using SDL) or via hardware MJPEG video
* devices such as the Pinnacle/Miro DC10(+), Iomega Buz,
* the Linux Media Labs LML33, the Matrox Marvel G200,
* Matrox Marvel G400 and the Rainbow Runner G-series.
*
* 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.
*/
#include <lav_io.h>
#include <editlist.h>
enum {
LAVPLAY_MSG_ERROR = 0,
LAVPLAY_MSG_WARNING = 1,
LAVPLAY_MSG_INFO = 2,
LAVPLAY_MSG_DEBUG = 3
};
enum {
LAVPLAY_STATE_STOP = 0, /* uninitialized state */
LAVPLAY_STATE_PAUSED = 1, /* also known as: speed = 0 */
LAVPLAY_STATE_PLAYING = 2 /* speed != 0 */
};
typedef struct {
int stats_changed; /* has anything bad happened? */
unsigned int frame; /* current frame which is being played back */
unsigned int num_corrs_a; /* Number of corrections because video ahead audio */
unsigned int num_corrs_b; /* Number of corrections because video behind audio */
unsigned int num_aerr; /* Number of audio buffers in error */
unsigned int num_asamps;
unsigned int nsync; /* Number of syncs */
unsigned int nqueue; /* Number of frames queued */
int play_speed; /* current playback speed */
int audio; /* whether audio is currently turned on */
int norm; /* [0-2] playback norm: 0 = PAL, 1 = NTSC, 2 = SECAM */
double tdiff; /* video/audio time difference (sync debug purposes) */
} video_playback_stats;
typedef struct {
char playback_mode; /* [HSC] H = hardware/on-screen, C = hardware/on-card, S = software (SDL) */
int horizontal_offset; /* Horizontal offset of the video when using hardware playback */
int vertical_offset; /* Vertical offset of the video when using hardware playback */
int exchange_fields; /* [0-1] whether to exchange the fields (for interlaced video) */
int zoom_to_fit; /* [0-1] zooms video to fit the screen as good as possible */
int flicker_reduction; /* [0-1] whether to use flicker reduction */
int sdl_width; /* width of the SDL playback window in case of software playback */
int sdl_height; /* height of the SDL playback window in case of software playback */
int soft_full_screen; /* [0-1] set software-driven full-screen/screen-output, 1 = yes, 0 = no */
int vw_x_offset; /* onscreen hardware playback video window X offset */
int vw_y_offset; /* onscreen hardware playback video window Y offset */
const char *video_dev; /* the video device */
const char *display; /* the X-display (only important for -H) */
int audio; /* When play audio, 0:never, or sum of 1:forward, 2:reverse, 4:fast, 8:pause */
int use_write; /* whether to use "write" (1) or mmap (0) for audio playback */
const char *audio_dev; /* the audio device */
int continuous; /* [0-1] 0 = quit when the video has been played, 1 = continue cycle */
int sync_correction; /* [0-1] Whether to enable sync correction, 0 = no, 1 = yes */
int sync_skip_frames; /* [0-1] If video is behind audio: 1 = skip video, 0 = insert audio */
int sync_ins_frames; /* [0-1] If video is ahead of audio: 1 = insert video, 0 = skip audio */
int MJPG_numbufs; /* Number of MJPEG-buffers */
int preserve_pathnames; /* [0-1] Don't canonicalise pathnames
* when creating edit lists */
EditList *editlist; /* the main editlist */
void (*output_statistics)(video_playback_stats *stats); /* speaks for itself */
void (*msg_callback)(int type, char* message); /* callback for error/info/warn messages */
void (*state_changed)(int new_state); /* changed state */
void (*get_video_frame)(uint8_t *buffer, int *len, long num); /* functions for manually submitting video/audio */
void (*get_audio_sample)(uint8_t *buff, int *samps, long num); /* functions for manually submitting video/audio */
void *settings; /* private info - don't touch :-) (type UNKNOWN) */
} lavplay_t;
/* malloc the pointer and set default options */
lavplay_t *lavplay_malloc(void);
/* the whole video-playback cycle */
int lavplay_main(lavplay_t *info);
/* stop playing back (which also deinitializes everything) */
int lavplay_stop(lavplay_t *info);
/* free info and quit if necessary */
int lavplay_free(lavplay_t *info);
/* Wait until playback is finished */
void lavplay_busy(lavplay_t *info);
/*** Methods for searching through the video stream ***/
/* go to a specific frame, if framenum<0, then it's 'total_frames - framenum' */
int lavplay_set_frame(lavplay_t *info, long framenum);
/* increase (numframes>0) or decrease (numframes<0) a number of frames */
int lavplay_increase_frame(lavplay_t *info, long numframes);
/* set the playback speed, if speed<0, then we're playing backwards */
int lavplay_set_speed(lavplay_t *info, int speed);
/*** Methods for simple video editing (cut/paste) ***/
/* cut a number of frames into a buffer */
int lavplay_edit_cut(lavplay_t *info, long start, long end);
/* copy a number of frames into a buffer */
int lavplay_edit_copy(lavplay_t *info, long start, long end);
/* paste frames from the buffer into a certain position */
int lavplay_edit_paste(lavplay_t *info, long destination);
/* add a number of frames from a new movie to a certain position in the current movie */
int lavplay_edit_addmovie(lavplay_t *info, char *movie, long start, long end, long destination);
/* move a number of frames to a different position */
int lavplay_edit_move(lavplay_t *info, long start, long end, long destination);
/* delete a number of frames from the current movie */
int lavplay_edit_delete(lavplay_t *info, long start, long end);
/* set the part of the movie that will actually be played, start<0 means whole movie */
int lavplay_edit_set_playable(lavplay_t *info, long start, long end);
/*** Control sound during video playback */
/* mutes or unmutes audio (1 = on, 0 = off) */
int lavplay_toggle_audio(lavplay_t *info, int audio);
/*** Methods for saving the currently played movie to editlists or open new movies */
/* save a certain range of frames to an editlist */
int lavplay_save_selection(lavplay_t *info, char *filename, long start, long end);
/* save the whole current movie to an editlist */
int lavplay_save_all(lavplay_t *info, char *filename);
/* open a new (series of) movie */
int lavplay_open(lavplay_t *info, char **files, int num_files);
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