xcbgrab.c File Reference

#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <xcb/xcb.h>
#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/time.h"
#include "libavformat/avformat.h"
#include "libavformat/demux.h"
#include "libavformat/internal.h"

Go to the source code of this file.

Data Structures
struct	XCBGrabContext

Macros
#define	FOLLOW_CENTER   -1
#define	OFFSET(x)   offsetof(XCBGrabContext, x)
#define	D   AV_OPT_FLAG_DECODING_PARAM
#define	CROSSHAIR_CURSOR   34

Functions
static int	xcbgrab_reposition (AVFormatContext *s, xcb_query_pointer_reply_t *p, xcb_get_geometry_reply_t *geo)
static void	xcbgrab_image_reply_free (void *opaque, uint8_t *data)
static int	xcbgrab_frame (AVFormatContext *s, AVPacket *pkt)
static int64_t	wait_frame (AVFormatContext *s, AVPacket *pkt)
static void	xcbgrab_update_region (AVFormatContext *s, int win_x, int win_y)
static int	xcbgrab_read_packet (AVFormatContext *s, AVPacket *pkt)
static av_cold int	xcbgrab_read_close (AVFormatContext *s)
static xcb_screen_t *	get_screen (const xcb_setup_t *setup, int screen_num)
static int	pixfmt_from_pixmap_format (AVFormatContext *s, int depth, int *pix_fmt, int *bpp)
static int	create_stream (AVFormatContext *s)
static void	draw_rectangle (AVFormatContext *s)
static void	setup_window (AVFormatContext *s)
static xcb_rectangle_t	rectangle_from_corners (xcb_point_t *corner_a, xcb_point_t *corner_b)
static int	select_region (AVFormatContext *s)
static av_cold int	xcbgrab_read_header (AVFormatContext *s)

Variables
static const AVOption	options []
static const AVClass	xcbgrab_class
const FFInputFormat	ff_xcbgrab_demuxer

Macro Definition Documentation

FOLLOW_CENTER

#define FOLLOW_CENTER   -1

Definition at line 83 of file xcbgrab.c.

OFFSET

#define OFFSET

(

x

)

offsetof(XCBGrabContext, x)

Definition at line 85 of file xcbgrab.c.

D

#define D   AV_OPT_FLAG_DECODING_PARAM

Definition at line 86 of file xcbgrab.c.

CROSSHAIR_CURSOR

#define CROSSHAIR_CURSOR   34

Definition at line 708 of file xcbgrab.c.

Function Documentation

xcbgrab_reposition()

static int xcbgrab_reposition ( AVFormatContext *  s, xcb_query_pointer_reply_t *  p, xcb_get_geometry_reply_t *  geo  )

static

Definition at line 113 of file xcbgrab.c.

Referenced by xcbgrab_read_packet().

xcbgrab_image_reply_free()

static void xcbgrab_image_reply_free ( void *  opaque, uint8_t *  data  )

static

Definition at line 154 of file xcbgrab.c.

Referenced by xcbgrab_frame().

xcbgrab_frame()

static int xcbgrab_frame ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 159 of file xcbgrab.c.

Referenced by xcbgrab_read_packet().

wait_frame()

static int64_t wait_frame ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 203 of file xcbgrab.c.

Referenced by xcbgrab_read_packet().

xcbgrab_update_region()

static void xcbgrab_update_region ( AVFormatContext *  s, int  win_x, int  win_y  )

static

Definition at line 404 of file xcbgrab.c.

Referenced by xcbgrab_read_packet().

xcbgrab_read_packet()

static int xcbgrab_read_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 416 of file xcbgrab.c.

xcbgrab_read_close()

static av_cold int xcbgrab_read_close ( AVFormatContext *  s )

static

Definition at line 489 of file xcbgrab.c.

Referenced by xcbgrab_read_header().

get_screen()

static xcb_screen_t* get_screen ( const xcb_setup_t *  setup, int  screen_num  )

static

Definition at line 502 of file xcbgrab.c.

Referenced by xcbgrab_read_header().

pixfmt_from_pixmap_format()

static int pixfmt_from_pixmap_format ( AVFormatContext *  s, int  depth, int *  pix_fmt, int *  bpp  )

static

Definition at line 519 of file xcbgrab.c.

Referenced by create_stream().

create_stream()

static int create_stream ( AVFormatContext *  s )

static

Definition at line 574 of file xcbgrab.c.

Referenced by xcbgrab_read_header().

draw_rectangle()

static void draw_rectangle ( AVFormatContext *  s )

static

Definition at line 649 of file xcbgrab.c.

Referenced by setup_window().

setup_window()

static void setup_window ( AVFormatContext *  s )

static

Definition at line 672 of file xcbgrab.c.

Referenced by xcbgrab_read_header().

rectangle_from_corners()

static xcb_rectangle_t rectangle_from_corners ( xcb_point_t *  corner_a, xcb_point_t *  corner_b  )

static

Definition at line 710 of file xcbgrab.c.

Referenced by select_region().

select_region()

static int select_region ( AVFormatContext *  s )

static

Definition at line 721 of file xcbgrab.c.

Referenced by xcbgrab_read_header().

xcbgrab_read_header()

static av_cold int xcbgrab_read_header ( AVFormatContext *  s )

static

Definition at line 819 of file xcbgrab.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "window_id", "Window to capture.", OFFSET(window_id), AV_OPT_TYPE_INT, { .i64 = XCB_NONE }, 0, UINT32_MAX, D },
    { "x", "Initial x coordinate.", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
    { "y", "Initial y coordinate.", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
    { "grab_x", "Initial x coordinate.", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
    { "grab_y", "Initial y coordinate.", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
    { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, D },
    { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc" }, 0, 0, D },
    { "draw_mouse", "Draw the mouse pointer.", OFFSET(draw_mouse), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
    { "follow_mouse", "Move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region.",
      OFFSET(follow_mouse), AV_OPT_TYPE_INT, { .i64 = 0 },  FOLLOW_CENTER, INT_MAX, D, .unit = "follow_mouse" },
    { "centered", "Keep the mouse pointer at the center of grabbing region when following.", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, D, .unit = "follow_mouse" },
    { "show_region", "Show the grabbing region.", OFFSET(show_region), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D },
    { "region_border", "Set the region border thickness.", OFFSET(region_border), AV_OPT_TYPE_INT, { .i64 = 3 }, 1, 128, D },
    { "select_region", "Select the grabbing region graphically using the pointer.", OFFSET(select_region), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, D },
    { NULL },
}

Definition at line 87 of file xcbgrab.c.

xcbgrab_class

const AVClass xcbgrab_class

static

Initial value:

= {
    .class_name = "xcbgrab indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
}

Definition at line 105 of file xcbgrab.c.

ff_xcbgrab_demuxer

const FFInputFormat ff_xcbgrab_demuxer

Initial value:

= {
    .p.name         = "x11grab",
    .p.long_name    = NULL_IF_CONFIG_SMALL("X11 screen capture, using XCB"),
    .p.flags        = AVFMT_NOFILE,
    .p.priv_class   = &xcbgrab_class,
    .priv_data_size = sizeof(XCBGrabContext),
    .read_header    = xcbgrab_read_header,
    .read_packet    = xcbgrab_read_packet,
    .read_close     = xcbgrab_read_close,
}

Definition at line 908 of file xcbgrab.c.