mpv/video/out/vo.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 "video/img_format.h"
#include "common/common.h"
#include "options/options.h"

#define VO_EVENT_EXPOSE 1
#define VO_EVENT_RESIZE 2
#define VO_EVENT_ICC_PROFILE_PATH_CHANGED 4

enum mp_voctrl {
    /* signal a device reset seek */
    VOCTRL_RESET = 1,
    /* Handle input and redraw events, called by vo_check_events() */
    VOCTRL_CHECK_EVENTS,
    /* used to switch to fullscreen */
    VOCTRL_FULLSCREEN,
    /* signal a device pause */
    VOCTRL_PAUSE,
    /* start/resume playback */
    VOCTRL_RESUME,

    VOCTRL_GET_PANSCAN,
    VOCTRL_SET_PANSCAN,
    VOCTRL_SET_EQUALIZER,               // struct voctrl_set_equalizer_args*
    VOCTRL_GET_EQUALIZER,               // struct voctrl_get_equalizer_args*

    /* for hardware decoding */
    VOCTRL_GET_HWDEC_INFO,              // struct mp_hwdec_info*

    VOCTRL_REDRAW_FRAME,

    VOCTRL_ONTOP,
    VOCTRL_BORDER,
    VOCTRL_UPDATE_WINDOW_TITLE,         // char*

    VOCTRL_SET_CURSOR_VISIBILITY,       // bool*

    VOCTRL_KILL_SCREENSAVER,
    VOCTRL_RESTORE_SCREENSAVER,

    VOCTRL_SET_DEINTERLACE,
    VOCTRL_GET_DEINTERLACE,

    VOCTRL_WINDOW_TO_OSD_COORDS,        // float[2] (x/y)
    VOCTRL_GET_WINDOW_SIZE,             // int[2] (w/h)
    VOCTRL_SET_WINDOW_SIZE,             // int[2] (w/h)

    // The VO is supposed to set  "known" fields, and leave the others
    // untouched or set to 0.
    // imgfmt/w/h/d_w/d_h can be omitted for convenience.
    VOCTRL_GET_COLORSPACE,              // struct mp_image_params*

    VOCTRL_SCREENSHOT,                  // struct voctrl_screenshot_args*

    VOCTRL_SET_COMMAND_LINE,            // char**

    VOCTRL_GET_ICC_PROFILE_PATH,        // char**

    VOCTRL_GET_PREF_DEINT,              // int*
};

// 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 image with talloc_free().
    // 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;
    // Whether the VO rendered OSD/subtitles into out_image
    bool has_osd;
};

#define VO_TRUE         true
#define VO_FALSE        false
#define VO_ERROR        -1
#define VO_NOTAVAIL     -2
#define VO_NOTIMPL      -3

#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
#define VOFLAG_GL_DEBUG         0x40  // Hint to request debug OpenGL context
#define VOFLAG_ALPHA            0x80  // Hint to request alpha framebuffer

// VO does handle mp_image_params.rotate in 90 degree steps
#define VO_CAP_ROTATE90 1

#define VO_MAX_QUEUE 5

struct vo;
struct osd_state;
struct mp_image;
struct mp_image_params;

struct vo_driver {
    // Encoding functionality, which can be invoked via --o only.
    bool encode;

    // VO_CAP_* bits
    int caps;

    const char *name;
    const char *description;

    /*
     *   returns: zero on successful initialization, non-zero on error.
     */
    int (*preinit)(struct vo *vo);

    /*
     * Whether the given image format is supported and config() will succeed.
     * format: one of IMGFMT_*
     * returns: 0 on not supported, otherwise a bitmask of VFCAP_* values
     */
    int (*query_format)(struct vo *vo, uint32_t format);

    /*
     * Optional. Can be used to convert the input image into something VO
     * internal, such as GPU surfaces. Ownership of mpi is passed to the
     * function, and the returned image is owned by the caller.
     * The following guarantees are given:
     * - mpi has the format with which the VO was configured
     * - the returned image can be arbitrary, and the VO merely manages its
     *   lifetime
     * - images passed to draw_image are always passed through this function
     * - the maximum number of images kept alive is not over vo->max_video_queue
     * - if vo->max_video_queue is large enough, some images may be buffered ahead
     */
    struct mp_image *(*filter_image)(struct vo *vo, struct mp_image *mpi);

    /*
     * Initialize or reconfigure the display driver.
     *   params: video parameters, like pixel format and frame size
     *   flags: combination of VOFLAG_ values
     * returns: < 0 on error, >= 0 on success
     */
    int (*reconfig)(struct vo *vo, struct mp_image_params *params, int flags);

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

    /*
     * Render the given frame to the VO's backbuffer. This operation will be
     * followed by a draw_osd and a flip_page[_timed] call.
     * mpi belongs to the caller; if the VO needs it longer, it has to create
     * a new reference to mpi.
     */
    void (*draw_image)(struct vo *vo, struct mp_image *mpi);

    /*
     * 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!
     * pts_us is the frame presentation time, linked to mp_time_us().
     * pts_us is 0 if the frame should be presented immediately.
     * duration is estimated time in us until the next frame is shown.
     * duration is -1 if it is unknown or unset.
     */
    void (*flip_page)(struct vo *vo);
    void (*flip_page_timed)(struct vo *vo, int64_t pts_us, int duration);

    /*
     * 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 {
    struct mp_log *log; // Using e.g. "[vo/vdpau]" as prefix
    int config_ok;      // Last config call was successful?
    struct mp_image_params *params; // Configured parameters (as in vo_reconfig)

    bool probing;

    bool untimed;       // non-interactive, don't do sleep calls in playloop

    bool want_redraw;   // visible frame wrong (window resize), needs refresh
    bool hasframe;      // >= 1 frame has been drawn, so redraw is possible
    double wakeup_period; // if > 0, this sets the maximum wakeup period for event polling

    double flip_queue_offset; // queue flip events at most this much in advance
    int max_video_queue; // queue this many decoded video frames (<=VO_MAX_QUEUE)

    // Frames to display; the next (i.e. oldest, lowest PTS) image has index 0.
    struct mp_image *video_queue[VO_MAX_QUEUE];
    int num_video_queue;

    const struct vo_driver *driver;
    void *priv;
    struct mp_vo_opts *opts;
    struct mpv_global *global;
    struct vo_x11_state *x11;
    struct vo_w32_state *w32;
    struct vo_cocoa_state *cocoa;
    struct vo_wayland_state *wayland;
    struct encode_lavc_context *encode_lavc_ctx;
    struct input_ctx *input_ctx;
    int event_fd;  // check_events() should be called when this has input

    // current window state
    int dwidth;
    int dheight;
    float monitor_par;

    char *window_title;
};

struct mpv_global;
struct vo *init_best_video_out(struct mpv_global *global,
                               struct input_ctx *input_ctx,
                               struct encode_lavc_context *encode_lavc_ctx);
int vo_reconfig(struct vo *vo, struct mp_image_params *p, int flags);

int vo_control(struct vo *vo, uint32_t request, void *data);
void vo_queue_image(struct vo *vo, struct mp_image *mpi);
int vo_redraw_frame(struct vo *vo);
bool vo_get_want_redraw(struct vo *vo);
bool vo_has_next_frame(struct vo *vo, bool eof);
double vo_get_next_pts(struct vo *vo, int index);
bool vo_needs_new_image(struct vo *vo);
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, int64_t 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);

struct mp_keymap {
  int from;
  int to;
};
int lookup_keymap_table(const struct mp_keymap *map, int key);

void vo_mouse_movement(struct vo *vo, int posx, int posy);
void vo_drop_files(struct vo *vo, int num_files, char **files);

struct mp_osd_res;
void vo_get_src_dst_rects(struct vo *vo, struct mp_rect *out_src,
                          struct mp_rect *out_dst, struct mp_osd_res *out_osd);

#endif /* MPLAYER_VIDEO_OUT_H */