vlc_input.h

mips版本的VLC视频服务器

    if( !a )
        return NULL;
    a->psz_name = strdup( psz_name ? psz_name : "" );
    a->psz_mime = strdup( psz_mime ? psz_mime : "" );
    a->psz_description = strdup( psz_description ? psz_description : "" );
    a->i_data = i_data;
    a->p_data = NULL;
    if( i_data > 0 )
    {
        a->p_data = malloc( i_data );
        if( a->p_data && p_data )
            memcpy( a->p_data, p_data, i_data );
    }
    return a;
}
static inline input_attachment_t *vlc_input_attachment_Duplicate( const input_attachment_t *a )
{
    return vlc_input_attachment_New( a->psz_name, a->psz_mime, a->psz_description,
                                     a->p_data, a->i_data );
}
static inline void vlc_input_attachment_Delete( input_attachment_t *a )
{
    if( !a )
        return;
    free( a->psz_name );
    free( a->psz_mime );
    free( a->psz_description );
    free( a->p_data );
    free( a );
}

/*****************************************************************************
 * input defines/constants.
 *****************************************************************************/

/* i_update field of access_t/demux_t */
#define INPUT_UPDATE_NONE       0x0000
#define INPUT_UPDATE_SIZE       0x0001
#define INPUT_UPDATE_TITLE      0x0010
#define INPUT_UPDATE_SEEKPOINT  0x0020
#define INPUT_UPDATE_META       0x0040
#define INPUT_UPDATE_SIGNAL     0x0080

/** Get the input item for an input thread
 * FIXME see src/input/item.c but is is unsafe unless
 * you hold p_input
 */
VLC_EXPORT(input_item_t*, input_GetItem, (input_thread_t*));

typedef struct input_thread_private_t input_thread_private_t;

/**
 * Main structure representing an input thread. This structure is mostly
 * private. The only public fields are READ-ONLY. You must use the helpers
 * to modify them
 */
struct input_thread_t
{
    VLC_COMMON_MEMBERS;

    bool b_eof;
    bool b_preparsing;
    bool b_dead;

    int i_state;
    bool b_can_pace_control;
    int64_t     i_time;     /* Current time */

    /* Internal caching common to all inputs */
    mtime_t i_pts_delay;

    /* All other data is input_thread is PRIVATE. You can't access it
     * outside of src/input */
    input_thread_private_t *p;
};

/**
 * Record prefix string.
 * TODO make it configurable.
 */
#define INPUT_RECORD_PREFIX "vlc-record-%Y-%m-%d-%H:%M:%S-$ N-$ p"

/*****************************************************************************
 * Input events and variables
 *****************************************************************************/

/**
 * \defgroup inputvariable Input variables
 *
 * The input provides multiples variable you can write to and/or read from.
 *
 * TODO complete the documentation.
 * The read only variables are:
 *  - "length"
 *  - "can-seek" (if you can seek, it doesn't say if 'bar display' has be shown
 *    or not, for that check position != 0.0)
 *  - "can-pause"
 *  - "can-rate"
 *  - "can-rewind"
 *  - "can-record" (if a stream can be recorded while playing)
 *  - "teletext-es" to get the index of spu track that is teletext -1 if no teletext)
 *  - "signal-quality"
 *  - "signal-strength"
 *  - "cache" (level of data cached [0 .. 1])
 *
 * The read-write variables are:
 *  - state (\see input_state_e)
 *  - rate, rate-slower, rate-faster
 *  - position, position-offset
 *  - time, time-offset
 *  - title, next-title, prev-title
 *  - chapter, next-chapter, next-chapter-prev
 *  - program, audio-es, video-es, spu-es
 *  - audio-delay, spu-delay
 *  - bookmark (bookmark list)
 *  - record
 *  - frame-next
 *  - navigation (list of "title %2i")
 *  - "title %2i"
 *
 * The variable used for event is
 *  - intf-event (\see input_event_type_e)
 */

/**
 * Input state
 *
 * This enum is used by the variable "state"
 */
typedef enum input_state_e
{
    INIT_S = 0,
    OPENING_S,
    PLAYING_S,
    PAUSE_S,
    END_S,
    ERROR_S,
} input_state_e;

/**
 * Input rate.
 *
 * It is an integer used by the variable "rate" in the
 * range [INPUT_RATE_MIN, INPUT_RATE_MAX] the default value
 * being INPUT_RATE_DEFAULT.
 *
 * A value lower than INPUT_RATE_DEFAULT plays faster.
 * A value higher than INPUT_RATE_DEFAULT plays slower.
 */

/**
 * Default rate value
 */
#define INPUT_RATE_DEFAULT  1000
/**
 * Minimal rate value
 */
#define INPUT_RATE_MIN        32            /* Up to 32/1 */
/**
 * Maximal rate value
 */
#define INPUT_RATE_MAX     32000            /* Up to 1/32 */

/**
 * Input events
 *
 * You can catch input event by adding a callback on the variable "intf-event".
 * This variable is an integer that will hold a input_event_type_e value.
 */
typedef enum input_event_type_e
{
    /* "state" has changed */
    INPUT_EVENT_STATE,
    /* "rate" has changed */
    INPUT_EVENT_RATE,
    /* At least one of "position" or "time" or "length" has changed */
    INPUT_EVENT_TIMES,

    /* A title has been added or removed or selected.
     * It imply that chapter has changed (not chapter event is sent) */
    INPUT_EVENT_TITLE,
    /* A chapter has been added or removed or selected. */
    INPUT_EVENT_CHAPTER,

    /* A program has been added or removed or selected */
    INPUT_EVENT_PROGRAM,
    /* A ES has been added or removed or selected */
    INPUT_EVENT_ES,
    /* "teletext-es" has changed */
    INPUT_EVENT_TELETEXT,

    /* "record" has changed */
    INPUT_EVENT_RECORD,

    /* A vout has been created/deleted by *the input* */
    INPUT_EVENT_VOUT,

    /* input_item_t media has changed */
    INPUT_EVENT_ITEM_META,
    /* input_item_t info has changed */
    INPUT_EVENT_ITEM_INFO,
    /* input_item_t name has changed */
    INPUT_EVENT_ITEM_NAME,

    /* Input statistics have been updated */
    INPUT_EVENT_STATISTICS,
    /* At least one of "signal-quality" or "signal-strength" has changed */
    INPUT_EVENT_SIGNAL,

    /* "audio-delay" has changed */
    INPUT_EVENT_AUDIO_DELAY,
    /* "spu-delay" has changed */
    INPUT_EVENT_SUBTITLE_DELAY,

    /* "bookmark" has changed */
    INPUT_EVENT_BOOKMARK,

    /* cache" has changed */
    INPUT_EVENT_CACHE,

} input_event_type_e;

/** @}*/

/*****************************************************************************
 * Prototypes
 *****************************************************************************/

/* input_CreateThread
 * Release the returned input_thread_t using vlc_object_release() */
#define input_CreateThread(a,b) __input_CreateThread(VLC_OBJECT(a),b)
VLC_EXPORT( input_thread_t *, __input_CreateThread, ( vlc_object_t *, input_item_t * ) );

#define input_Preparse(a,b) __input_Preparse(VLC_OBJECT(a),b)
VLC_EXPORT( int, __input_Preparse, ( vlc_object_t *, input_item_t * ) );

#define input_Read(a,b,c) __input_Read(VLC_OBJECT(a),b, c)
VLC_EXPORT( int, __input_Read, ( vlc_object_t *, input_item_t *, bool ) );
VLC_EXPORT( void,             input_StopThread,     ( input_thread_t * ) );

enum input_query_e
{
    /* input variable "position" */
    INPUT_GET_POSITION,         /* arg1= double *       res=    */
    INPUT_SET_POSITION,         /* arg1= double         res=can fail    */

    /* input variable "length" */
    INPUT_GET_LENGTH,           /* arg1= int64_t *      res=can fail    */

    /* input variable "time" */
    INPUT_GET_TIME,             /* arg1= int64_t *      res=    */
    INPUT_SET_TIME,             /* arg1= int64_t        res=can fail    */

    /* input variable "rate" (1 is DEFAULT_RATE) */
    INPUT_GET_RATE,             /* arg1= int *          res=    */
    INPUT_SET_RATE,             /* arg1= int            res=can fail    */

    /* input variable "state" */
    INPUT_GET_STATE,            /* arg1= int *          res=    */
    INPUT_SET_STATE,            /* arg1= int            res=can fail    */

    /* input variable "audio-delay" and "sub-delay" */
    INPUT_GET_AUDIO_DELAY,      /* arg1 = int* res=can fail */
    INPUT_SET_AUDIO_DELAY,      /* arg1 = int  res=can fail */
    INPUT_GET_SPU_DELAY,        /* arg1 = int* res=can fail */
    INPUT_SET_SPU_DELAY,        /* arg1 = int  res=can fail */

    /* Meta datas */
    INPUT_ADD_INFO,   /* arg1= char* arg2= char* arg3=...     res=can fail */
    INPUT_GET_INFO,   /* arg1= char* arg2= char* arg3= char** res=can fail */
    INPUT_DEL_INFO,   /* arg1= char* arg2= char*              res=can fail */
    INPUT_SET_NAME,   /* arg1= char* res=can fail    */

    /* Input config options */
    INPUT_ADD_OPTION,      /* arg1= char * arg2= char *  res=can fail*/

    /* Input properties */
    INPUT_GET_VIDEO_FPS,         /* arg1= double *        res=can fail */

    /* bookmarks */
    INPUT_GET_BOOKMARK,    /* arg1= seekpoint_t *               res=can fail */
    INPUT_GET_BOOKMARKS,   /* arg1= seekpoint_t *** arg2= int * res=can fail */
    INPUT_CLEAR_BOOKMARKS, /* res=can fail */
    INPUT_ADD_BOOKMARK,    /* arg1= seekpoint_t *  res=can fail   */
    INPUT_CHANGE_BOOKMARK, /* arg1= seekpoint_t * arg2= int * res=can fail   */
    INPUT_DEL_BOOKMARK,    /* arg1= seekpoint_t *  res=can fail   */
    INPUT_SET_BOOKMARK,    /* arg1= int  res=can fail    */

    /* Attachments */
    INPUT_GET_ATTACHMENTS, /* arg1=input_attachment_t***, arg2=int*  res=can fail */
    INPUT_GET_ATTACHMENT,  /* arg1=input_attachment_t**, arg2=char*  res=can fail */

    /* On the fly input slave */
    INPUT_ADD_SLAVE,       /* arg1= const char * */
    INPUT_ADD_SUBTITLE,    /* arg1= const char *, arg2=bool b_check_extension */

    /* On the fly record while playing */
    INPUT_SET_RECORD_STATE, /* arg1=bool    res=can fail */
    INPUT_GET_RECORD_STATE, /* arg1=bool*   res=can fail */

    /* ES */
    INPUT_RESTART_ES,       /* arg1=int (-AUDIO/VIDEO/SPU_ES for the whole category) */
};

VLC_EXPORT( int, input_vaControl,( input_thread_t *, int i_query, va_list  ) );
VLC_EXPORT( int, input_Control,  ( input_thread_t *, int i_query, ...  ) );

/**
 * It will return the current state of the input.
 * Provided for convenience.
 */
static inline input_state_e input_GetState( input_thread_t * p_input )
{
    input_state_e state = INIT_S;
    input_Control( p_input, INPUT_GET_STATE, &state );
    return state;
}
/**
 * It will add a new subtitle source to the input.
 * Provided for convenience.
 */
static inline int input_AddSubtitle( input_thread_t *p_input, const char *psz_url, bool b_check_extension )
{
    return input_Control( p_input, INPUT_ADD_SUBTITLE, psz_url, b_check_extension );
}

/* */
typedef struct input_clock_t input_clock_t;
VLC_EXPORT( decoder_t *, input_DecoderNew, ( input_thread_t *, es_format_t *, input_clock_t *, sout_instance_t * ) );
VLC_EXPORT( void, input_DecoderDelete, ( decoder_t * ) );
VLC_EXPORT( void, input_DecoderDecode,( decoder_t *, block_t * ) );

/**
 * This function allows to split a MRL into access, demux and path part.
 *
 *  You should not write into access and demux string as they may not point into
 * the provided buffer.
 *  The buffer provided by psz_dup will be modified.
 */
VLC_EXPORT( void, input_SplitMRL, ( const char **ppsz_access, const char **ppsz_demux, char **ppsz_path, char *psz_dup ) );

/**
 * This function creates a sane filename path.
 */
VLC_EXPORT( char *, input_CreateFilename, ( vlc_object_t *, const char *psz_path, const char *psz_prefix, const char *psz_extension ) );

#endif