console_video.h

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2007 Luigi Rizzo
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */
 
/*
 * Common header for console video support
 *
 * $Revision$
 */
 
#ifndef CONSOLE_VIDEO_H
#define CONSOLE_VIDEO_H
 
#if !defined(HAVE_VIDEO_CONSOLE) || !defined(HAVE_FFMPEG)
#define CONSOLE_VIDEO_CMDS                  \
        "console {device}"
#else
 
#include <ffmpeg/avcodec.h>
#ifndef OLD_FFMPEG
#include <ffmpeg/swscale.h>     /* requires a recent ffmpeg */
#endif
 
#define CONSOLE_VIDEO_CMDS          \
    "console {videodevice|videocodec"   \
    "|video_size|bitrate|fps|qmin"      \
    "|sendvideo|keypad"         \
    "|sdl_videodriver"          \
    "|device|startgui|stopgui"      \
    "}"
 
#endif  /* HAVE_VIDEO_CONSOLE and others */
 
#define SRC_WIN_W   80  /* width of video thumbnails */
#define SRC_WIN_H   60  /* height of video thumbnails */
/* we only support a limited number of video sources in the GUI,
 * because we need screen estate to switch between them.
 */
#define MAX_VIDEO_SOURCES   9
 
/*
 * In many places we use buffers to store the raw frames (but not only),
 * so here is a structure to keep all the info. data = NULL means the
 * structure is not initialized, so the other fields are invalid.
 * size = 0 means the buffer is not malloc'ed so we don't have to free it.
 */
struct fbuf_t {     /* frame buffers, dynamically allocated */
    uint8_t *data;  /* memory, malloced if size > 0, just reference
             * otherwise */
    int size;   /* total size in bytes */
    int used;   /* space used so far */
    int ebit;   /* bits to ignore at the end */
    int x;  /* origin, if necessary */
    int y;
    int w;  /* size */
    int h;
    int pix_fmt;
    /* offsets and size of the copy in Picture-in-Picture mode */
    int win_x;
    int win_y;
    int win_w;
    int win_h;
};
 
void fbuf_free(struct fbuf_t *);
 
/* descriptor for a grabber */
struct grab_desc {
    const char *name;
    void *(*open)(const char *name, struct fbuf_t *geom, int fps);
    struct fbuf_t *(*read)(void *d);
    void (*move)(void *d, int dx, int dy);
    void *(*close)(void *d);
};
 
extern struct grab_desc *console_grabbers[];
 
struct video_desc;      /* opaque type for video support */
struct video_desc *get_video_desc(struct ast_channel *c);
 
/* linked by console_video.o */
int console_write_video(struct ast_channel *chan, struct ast_frame *f);
extern int console_video_formats;
int console_video_cli(struct video_desc *env, const char *var, int fd);
int console_video_config(struct video_desc **penv, const char *var, const char *val);
void console_video_uninit(struct video_desc *env);
void console_video_start(struct video_desc *env, struct ast_channel *owner);
int get_gui_startup(struct video_desc* env);
 
/* console_board.c */
 
/* Where do we send the keyboard/keypad output */
enum kb_output {
    KO_NONE,
    KO_INPUT,   /* the local input window */
    KO_DIALED,  /* the 'dialed number' window */
    KO_MESSAGE, /* the 'message' window */
};
 
enum drag_window {  /* which window are we dragging */
    DRAG_NONE,
    DRAG_LOCAL, /* local video */
    DRAG_REMOTE,    /* remote video */
    DRAG_DIALED,    /* dialed number */
    DRAG_INPUT, /* input window */
    DRAG_MESSAGE,   /* message window */
    DRAG_PIP,   /* picture in picture */
};
 
/*! \brief support for drag actions */
struct drag_info {
    int     x_start;    /* last known mouse position */
    int     y_start;
    enum drag_window drag_window;
};
/*! \brief info related to the gui: button status, mouse coords, etc. */
struct board;
/* !\brief print a message on a board */
void move_message_board(struct board *b, int dy);
int print_message(struct board *b, const char *s);
 
/*! \brief return the whole text from a board */
const char *read_message(const struct board *b);
 
/*! \brief reset the board to blank */
int reset_board(struct board *b);
 
/*! \brief deallocates memory space for a board */
void delete_board(struct board *b);
#endif /* CONSOLE_VIDEO_H */
/* end of file */