mpv/core/input/input.h

/*
 * 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_INPUT_H
#define MPLAYER_INPUT_H

#include <stdbool.h>
#include "core/bstr.h"
#include "core/m_option.h"

// All command IDs
enum mp_command_type {
    MP_CMD_IGNORE,
    MP_CMD_SEEK,
    MP_CMD_QUIT,
    MP_CMD_PLAYLIST_NEXT,
    MP_CMD_PLAYLIST_PREV,
    MP_CMD_OSD,
    MP_CMD_TV_STEP_CHANNEL,
    MP_CMD_TV_STEP_NORM,
    MP_CMD_TV_STEP_CHANNEL_LIST,
    MP_CMD_SCREENSHOT,
    MP_CMD_LOADFILE,
    MP_CMD_LOADLIST,
    MP_CMD_PLAYLIST_CLEAR,
    MP_CMD_SUB_STEP,
    MP_CMD_TV_SET_CHANNEL,
    MP_CMD_EDL_MARK,
    MP_CMD_TV_LAST_CHANNEL,
    MP_CMD_TV_SET_FREQ,
    MP_CMD_TV_SET_NORM,
    MP_CMD_FRAME_STEP,
    MP_CMD_SPEED_MULT,
    MP_CMD_RUN,
    MP_CMD_SUB_ADD,
    MP_CMD_SUB_REMOVE,
    MP_CMD_SUB_RELOAD,
    MP_CMD_KEYDOWN_EVENTS,
    MP_CMD_SET,
    MP_CMD_GET_PROPERTY,
    MP_CMD_PRINT_TEXT,
    MP_CMD_SHOW_TEXT,
    MP_CMD_SHOW_PROGRESS,
    MP_CMD_RADIO_STEP_CHANNEL,
    MP_CMD_RADIO_SET_CHANNEL,
    MP_CMD_RADIO_SET_FREQ,
    MP_CMD_SET_MOUSE_POS,
    MP_CMD_ADD,
    MP_CMD_CYCLE,
    MP_CMD_RADIO_STEP_FREQ,
    MP_CMD_TV_STEP_FREQ,
    MP_CMD_TV_START_SCAN,
    MP_CMD_STOP,

    /// DVB commands
    MP_CMD_DVB_SET_CHANNEL = 5101,

    /// Audio Filter commands
    MP_CMD_AF_SWITCH,
    MP_CMD_AF_ADD,
    MP_CMD_AF_DEL,
    MP_CMD_AF_CLR,
    MP_CMD_AF_CMDLINE,

    MP_CMD_SHOW_CHAPTERS,
    MP_CMD_SHOW_TRACKS,

    /// Video output commands
    MP_CMD_VO_CMDLINE,
};

#define MP_CMD_MAX_ARGS 10

// Error codes for the drivers

// An error occurred but we can continue
#define MP_INPUT_ERROR -1
// A fatal error occurred, this driver should be removed
#define MP_INPUT_DEAD -2
// No input was available
#define MP_INPUT_NOTHING -3
//! Input will be available if you try again
#define MP_INPUT_RETRY -4
// Key FIFO was full - release events may be lost, zero button-down status
#define MP_INPUT_RELEASE_ALL -5

enum mp_on_osd {
    MP_ON_OSD_NO = 0,           // prefer not using OSD
    MP_ON_OSD_AUTO = 1,         // use default behavior of the specific command
    MP_ON_OSD_BAR = 2,          // force a bar, if applicable
    MP_ON_OSD_MSG = 4,          // force a message, if applicable
};

enum mp_input_section_flags {
    // If a key binding is not defined in the current section, search the
    // default section for it ("default" refers to bindings with no section
    // specified, not to the default input.conf aka builtin key bindings)
    MP_INPUT_NO_DEFAULT_SECTION = 1,
};

struct input_ctx;

struct mp_cmd_arg {
    struct m_option type;
    bool optional;
    union {
        int i;
        float f;
        char *s;
    } v;
};

typedef struct mp_cmd {
    int id;
    char *name;
    struct mp_cmd_arg args[MP_CMD_MAX_ARGS];
    int nargs;
    int pausing;
    enum mp_on_osd on_osd;
    bstr original;
    struct mp_cmd *queue_next;
} mp_cmd_t;


// Executing this command will abort playback (play something else, or quit).
bool mp_input_is_abort_cmd(int cmd_id);

/* Add a new command input source.
 * "fd" is a file descriptor (use a negative value if you don't use any fd)
 * "select" tells whether to use select() on the fd to determine when to
 * try reading.
 * "read_func" is optional. If NULL a default function which reads data
 * directly from the fd will be used. It must return either text data
 * or one of the MP_INPUT error codes above.
 * "close_func" will be called when closing. Can be NULL. Its return value
 * is ignored (it's only there to allow using standard close() as the func).
 */
int mp_input_add_cmd_fd(struct input_ctx *ictx, int fd, int select,
                        int read_func(int fd, char *dest, int size),
                        int close_func(int fd));

// This removes a cmd driver, you usually don't need to use it.
void mp_input_rm_cmd_fd(struct input_ctx *ictx, int fd);

/* The args are similar to the cmd version above, except you must give
 * a read_func, and it should return key codes (ASCII plus keycodes.h).
 */
int mp_input_add_key_fd(struct input_ctx *ictx, int fd, int select,
                        int read_func(void *ctx, int fd),
                        int close_func(int fd), void *ctx);

// Feed a keypress (alternative to being returned from read_func above)
void mp_input_feed_key(struct input_ctx *ictx, int code);

// As for the cmd one you usually don't need this function.
void mp_input_rm_key_fd(struct input_ctx *ictx, int fd);

// Get input key from its name.
int mp_input_get_key_from_name(const char *name);

// Add a command to the command queue.
int mp_input_queue_cmd(struct input_ctx *ictx, struct mp_cmd *cmd);

/* Return next available command, or sleep up to "time" ms if none is
 * available. If "peek_only" is true return a reference to the command
 * but leave it queued.
 */
struct mp_cmd *mp_input_get_cmd(struct input_ctx *ictx, int time,
                                int peek_only);

// Parse text and return corresponding struct mp_cmd.
// The location parameter is for error messages.
struct mp_cmd *mp_input_parse_cmd(bstr str, const char *location);

// After getting a command from mp_input_get_cmd you need to free it using this
// function
void mp_cmd_free(struct mp_cmd *cmd);

// This creates a copy of a command (used by the auto repeat stuff).
struct mp_cmd *mp_cmd_clone(struct mp_cmd *cmd);

// Set current input section
// flags is a bitfield of enum mp_input_section_flags values
void mp_input_set_section(struct input_ctx *ictx, char *name, int flags);

// Get current input section
char *mp_input_get_section(struct input_ctx *ictx);

// Initialize the input system
struct input_conf;
struct input_ctx *mp_input_init(struct input_conf *input_conf);

void mp_input_uninit(struct input_ctx *ictx);

struct m_config;
void mp_input_register_options(struct m_config *cfg);

// Wake up sleeping input loop from another thread.
void mp_input_wakeup(struct input_ctx *ictx);

// Interruptible usleep:  (used by demux)
int mp_input_check_interrupt(struct input_ctx *ictx, int time);

extern int async_quit_request;

#endif /* MPLAYER_INPUT_H */