mpv/libvo/video_out.h

/*
 * Copyright (C) Aaron Holtzman - Aug 1999
 * Strongly modified, most parts rewritten: A'rpi/ESP-team - 2000-2001
 * (C) MPlayer developers
 *
 * This file is part of MPlayer.
 *
 * MPlayer 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.
 *
 * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef MPLAYER_VIDEO_OUT_H
#define MPLAYER_VIDEO_OUT_H

#include <inttypes.h>
#include <stdbool.h>

#include "libmpcodecs/img_format.h"
#include "mpcommon.h"

#define VO_EVENT_EXPOSE 1
#define VO_EVENT_RESIZE 2
#define VO_EVENT_KEYPRESS 4
#define VO_EVENT_REINIT 8
#define VO_EVENT_MOVE 16

enum mp_voctrl {
    /* does the device support the required format */
    VOCTRL_QUERY_FORMAT = 1,
    /* signal a device reset seek */
    VOCTRL_RESET,
    /* used to switch to fullscreen */
    VOCTRL_FULLSCREEN,
    /* signal a device pause */
    VOCTRL_PAUSE,
    /* start/resume playback */
    VOCTRL_RESUME,
    /* libmpcodecs direct rendering */
    VOCTRL_GET_IMAGE,
    VOCTRL_DRAW_IMAGE,
    VOCTRL_GET_PANSCAN,
    VOCTRL_SET_PANSCAN,
    VOCTRL_SET_EQUALIZER,               // struct voctrl_set_equalizer_args
    VOCTRL_GET_EQUALIZER,               // struct voctrl_get_equalizer_args
    VOCTRL_DUPLICATE_FRAME,

    VOCTRL_START_SLICE,

    VOCTRL_NEWFRAME,
    VOCTRL_SKIPFRAME,
    VOCTRL_REDRAW_FRAME,

    VOCTRL_ONTOP,
    VOCTRL_ROOTWIN,
    VOCTRL_BORDER,
    VOCTRL_DRAW_EOSD,
    VOCTRL_GET_EOSD_RES,                // struct mp_eosd_res
    VOCTRL_QUERY_EOSD_FORMAT,           // int

    VOCTRL_SET_DEINTERLACE,
    VOCTRL_GET_DEINTERLACE,

    VOCTRL_UPDATE_SCREENINFO,

    VOCTRL_SET_YUV_COLORSPACE,          // struct mp_csp_details
    VOCTRL_GET_YUV_COLORSPACE,          // struct mp_csp_details

    VOCTRL_SCREENSHOT,                  // struct voctrl_screenshot_args

    VOCTRL_SET_COMMAND_LINE,            // char*
};

// VOCTRL_SET_EQUALIZER
struct voctrl_set_equalizer_args {
    const char *name;
    int value;
};

// VOCTRL_GET_EQUALIZER
struct voctrl_get_equalizer_args {
    const char *name;
    int *valueptr;
};

// VOCTRL_SCREENSHOT
struct voctrl_screenshot_args {
    // 0: Save image of the currently displayed video frame, in original
    //    resolution.
    // 1: Save full screenshot of the window. Should contain OSD, EOSD, and the
    //    scaled video.
    // The value of this variable can be ignored if only a single method is
    // implemented.
    int full_window;
    // Will be set to a newly allocated image, that contains the screenshot.
    // The caller has to free the pointer with free_mp_image().
    // It is not specified whether the image data is a copy or references the
    // image data directly.
    // Is never NULL. (Failure has to be indicated by returning VO_FALSE.)
    struct mp_image *out_image;
};

typedef struct {
  int x,y;
  int w,h;
} mp_win_t;

#define VO_TRUE		1
#define VO_FALSE	0
#define VO_ERROR	-1
#define VO_NOTAVAIL	-2
#define VO_NOTIMPL	-3

#define VOFLAG_FULLSCREEN	0x01
#define VOFLAG_MODESWITCHING	0x02
#define VOFLAG_SWSCALE		0x04
#define VOFLAG_FLIPPING		0x08
#define VOFLAG_HIDDEN		0x10  //< Use to create a hidden window
#define VOFLAG_STEREO		0x20  //< Use to create a stereo-capable window

typedef struct vo_info_s
{
    /* driver name ("Matrox Millennium G200/G400" */
    const char *name;
    /* short name (for config strings) ("vdpau") */
    const char *short_name;
    /* author ("Aaron Holtzman <aholtzma@ess.engr.uvic.ca>") */
    const char *author;
    /* any additional comments */
    const char *comment;
} vo_info_t;

struct vo;
struct osd_state;
struct mp_image;

struct vo_driver {
    // Driver uses new API
    bool is_new;
    // Driver buffers or adds (deinterlace) frames and will keep track
    // of pts values itself
    bool buffer_frames;

    const vo_info_t *info;
    /*
     * Preinitializes driver (real INITIALIZATION)
     *   arg - currently it's vo_subdevice
     *   returns: zero on successful initialization, non-zero on error.
     */
    int (*preinit)(struct vo *vo, const char *arg);
    /*
     * Initialize (means CONFIGURE) the display driver.
     * params:
     *   width,height: image source size
     *   d_width,d_height: size of the requested window size, just a hint
     *   fullscreen: flag, 0=windowd 1=fullscreen, just a hint
     *   title: window title, if available
     *   format: fourcc of pixel format
     * returns : zero on successful initialization, non-zero on error.
     */
    int (*config)(struct vo *vo, uint32_t width, uint32_t height,
                  uint32_t d_width, uint32_t d_height, uint32_t fullscreen,
                  uint32_t format);

    /*
     * Control interface
     */
    int (*control)(struct vo *vo, uint32_t request, void *data);

    void (*draw_image)(struct vo *vo, struct mp_image *mpi, double pts);

    /*
     * Get extra frames from the VO, such as those added by VDPAU
     * deinterlace. Preparing the next such frame if any could be done
     * automatically by the VO after a previous flip_page(), but having
     * it as a separate step seems to allow making code more robust.
     */
    void (*get_buffered_frame)(struct vo *vo, bool eof);

    /*
     * Draw a planar YUV slice to the buffer:
     * params:
     *   src[3] = source image planes (Y,U,V)
     *   stride[3] = source image planes line widths (in bytes)
     *   w,h = width*height of area to be copied (in Y pixels)
     *   x,y = position at the destination image (in Y pixels)
     */
    int (*draw_slice)(struct vo *vo, uint8_t *src[], int stride[], int w,
                      int h, int x, int y);

    /*
     * Draws OSD to the screen buffer
     */
    void (*draw_osd)(struct vo *vo, struct osd_state *osd);

    /*
     * Blit/Flip buffer to the screen. Must be called after each frame!
     */
    void (*flip_page)(struct vo *vo);
    void (*flip_page_timed)(struct vo *vo, unsigned int pts_us, int duration);

    /*
     * This func is called after every frames to handle keyboard and
     * other events. It's called in PAUSE mode too!
     */
    void (*check_events)(struct vo *vo);

    /*
     * Closes driver. Should restore the original state of the system.
     */
    void (*uninit)(struct vo *vo);

    // Size of private struct for automatic allocation (0 doesn't allocate)
    int priv_size;

    // If not NULL, it's copied into the newly allocated private struct.
    const void *priv_defaults;

    // List of options to parse into priv struct (requires privsize to be set)
    const struct m_option *options;
};

struct vo {
    int config_ok;  // Last config call was successful?
    int config_count;  // Total number of successful config calls

    bool frame_loaded;  // Is there a next frame the VO could flip to?
    struct mp_image *waiting_mpi;
    double next_pts;    // pts value of the next frame if any
    double next_pts2;   // optional pts of frame after that
    bool want_redraw;   // visible frame wrong (window resize), needs refresh
    bool redrawing;     // between redrawing frame and flipping it
    bool hasframe;      // >= 1 frame has been drawn, so redraw is possible

    double flip_queue_offset; // queue flip events at most this much in advance

    const struct vo_driver *driver;
    void *priv;
    struct MPOpts *opts;
    struct vo_x11_state *x11;
    struct vo_w32_state *w32;
    struct mp_fifo *key_fifo;
    struct encode_lavc_context *encode_lavc_ctx;
    struct input_ctx *input_ctx;
    int event_fd;  // check_events() should be called when this has input
    int registered_fd;  // set to event_fd when registered in input system

    // requested position/resolution
    int dx;
    int dy;
    int dwidth;
    int dheight;

    int panscan_x;
    int panscan_y;
    float panscan_amount;
    float monitor_aspect;
    struct aspect_data {
        int orgw; // real width
        int orgh; // real height
        int prew; // prescaled width
        int preh; // prescaled height
        int scrw; // horizontal resolution
        int scrh; // vertical resolution
        float asp;
    } aspdat;

    char *window_title;
};

struct vo *init_best_video_out(struct MPOpts *opts,
                               struct mp_fifo *key_fifo,
                               struct input_ctx *input_ctx,
                               struct encode_lavc_context *encode_lavc_ctx);
int vo_config(struct vo *vo, uint32_t width, uint32_t height,
                     uint32_t d_width, uint32_t d_height, uint32_t flags,
                     uint32_t format);
void list_video_out(void);

int vo_control(struct vo *vo, uint32_t request, void *data);
int vo_draw_image(struct vo *vo, struct mp_image *mpi, double pts);
int vo_redraw_frame(struct vo *vo);
int vo_get_buffered_frame(struct vo *vo, bool eof);
void vo_skip_frame(struct vo *vo);
int vo_draw_slice(struct vo *vo, uint8_t *src[], int stride[], int w, int h, int x, int y);
void vo_new_frame_imminent(struct vo *vo);
void vo_draw_osd(struct vo *vo, struct osd_state *osd);
void vo_flip_page(struct vo *vo, unsigned int pts_us, int duration);
void vo_check_events(struct vo *vo);
void vo_seek_reset(struct vo *vo);
void vo_destroy(struct vo *vo);

const char *vo_get_window_title(struct vo *vo);

// NULL terminated array of all drivers
extern const struct vo_driver *video_out_drivers[];

extern int xinerama_screen;
extern int xinerama_x;
extern int xinerama_y;

extern int vo_grabpointer;
extern int vo_vsync;
extern int vo_fs;
extern int vo_fsmode;
extern float vo_panscan;
extern int vo_adapter_num;
extern int vo_refresh_rate;
extern int vo_keepaspect;
extern int vo_rootwin;
extern int vo_border;

extern int vo_nomouse_input;
extern int enable_mouse_movements;

extern int vo_pts;
extern float vo_fps;

extern int vo_colorkey;

extern int64_t WinID;

struct mp_keymap {
  int from;
  int to;
};
int lookup_keymap_table(const struct mp_keymap *map, int key);
struct vo_rect {
  int left, right, top, bottom, width, height;
};
void calc_src_dst_rects(struct vo *vo, int src_width, int src_height,
                        struct vo_rect *src, struct vo_rect *dst,
                        struct vo_rect *borders, const struct vo_rect *crop);
void vo_mouse_movement(struct vo *vo, int posx, int posy);

static inline int aspect_scaling(void)
{
  return vo_keepaspect || vo_fs;
}

#endif /* MPLAYER_VIDEO_OUT_H */