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mpv/video/out/vo_xv.c
wm4 3b4682183c vo_xv: try harder to get correctly aligned pointers/strides 
To get guaranteed alignment for the chroma planes with typical YV12
playback, we have to double the alignment on the image width, as the
chroma planes have half the image width.

Clear the image with black instead of green to hide scaling artifacts
on the right border of the screen.

(It might be possible to create the image layout ourselves by not
calling XvShmCreateImage(), and filling in our own image width and exact
strides, but that's probably too risky: the Xv client library sends an
X protocol request to query the real image dimension and strides. It is
unknown to me whether X servers or drivers would generally accept an
image with mismatching parameters, even if the image is conceptually
valid.)

Allocate the image with av_malloc() in the non-SHM case. I suspect the
non-SHM case doesn't matter much, though.
2012-12-03 21:08:51 +01:00

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/*
* X11 Xv interface
*
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <libavutil/common.h>
#include "config.h"
#ifdef HAVE_SHM
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#endif
// Note: depends on the inclusion of X11/extensions/XShm.h
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>
#include "core/options.h"
#include "talloc.h"
#include "core/mp_msg.h"
#include "vo.h"
#include "video/vfcap.h"
#include "video/mp_image.h"
#include "video/filter/vf.h"
#include "x11_common.h"
#include "video/memcpy_pic.h"
#include "sub/sub.h"
#include "sub/draw_bmp.h"
#include "aspect.h"
#include "video/csputils.h"
#include "core/subopt-helper.h"
static const vo_info_t info = {
"X11/Xv",
"xv",
"Gerd Knorr <kraxel@goldbach.in-berlin.de> and others",
""
};
struct xvctx {
XvAdaptorInfo *ai;
XvImageFormatValues *fo;
unsigned int formats, adaptors, xv_format;
int current_buf;
int current_ip_buf;
int num_buffers;
int total_buffers;
int visible_buf;
XvImage *xvimage[2];
struct mp_draw_sub_backup *osd_backup;
uint32_t image_width;
uint32_t image_height;
uint32_t image_format;
struct mp_csp_details cached_csp;
int is_paused;
struct mp_rect src_rect;
struct mp_rect dst_rect;
uint32_t max_width, max_height; // zero means: not set
int mode_switched;
#ifdef HAVE_SHM
XShmSegmentInfo Shminfo[2];
int Shmem_Flag;
#endif
};
static void allocate_xvimage(struct vo *, int);
static void deallocate_xvimage(struct vo *vo, int foo);
static struct mp_image get_xv_buffer(struct vo *vo, int buf_index);
static void read_xv_csp(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
struct vo_x11_state *x11 = vo->x11;
struct mp_csp_details *cspc = &ctx->cached_csp;
*cspc = (struct mp_csp_details) MP_CSP_DETAILS_DEFAULTS;
int bt709_enabled;
if (vo_xv_get_eq(vo, x11->xv_port, "bt_709", &bt709_enabled))
cspc->format = bt709_enabled == 100 ? MP_CSP_BT_709 : MP_CSP_BT_601;
}
static void resize(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
// Can't be used, because the function calculates screen-space coordinates,
// while we need video-space.
struct mp_osd_res unused;
vo_get_src_dst_rects(vo, &ctx->src_rect, &ctx->dst_rect, &unused);
struct mp_rect *dst = &ctx->dst_rect;
int dw = dst->x1 - dst->x0, dh = dst->y1 - dst->y0;
vo_x11_clearwindow_part(vo, vo->x11->window, dw, dh);
vo_xv_draw_colorkey(vo, dst->x0, dst->y0, dw, dh);
read_xv_csp(vo);
}
/*
* connect to server, create and map window,
* allocate colors and (shared) memory
*/
static int config(struct vo *vo, uint32_t width, uint32_t height,
uint32_t d_width, uint32_t d_height, uint32_t flags,
uint32_t format)
{
struct vo_x11_state *x11 = vo->x11;
XVisualInfo vinfo;
XSetWindowAttributes xswa;
XWindowAttributes attribs;
unsigned long xswamask;
int depth;
struct xvctx *ctx = vo->priv;
int i;
ctx->image_height = height;
ctx->image_width = width;
ctx->image_format = format;
if ((ctx->max_width != 0 && ctx->max_height != 0)
&& (ctx->image_width > ctx->max_width
|| ctx->image_height > ctx->max_height)) {
mp_tmsg(MSGT_VO, MSGL_ERR, "Source image dimensions are too high: %ux%u (maximum is %ux%u)\n",
ctx->image_width, ctx->image_height, ctx->max_width,
ctx->max_height);
return -1;
}
ctx->visible_buf = -1;
/* check image formats */
ctx->xv_format = 0;
for (i = 0; i < ctx->formats; i++) {
mp_msg(MSGT_VO, MSGL_V, "Xvideo image format: 0x%x (%4.4s) %s\n",
ctx->fo[i].id, (char *) &ctx->fo[i].id,
(ctx->fo[i].format == XvPacked) ? "packed" : "planar");
if (ctx->fo[i].id == format)
ctx->xv_format = ctx->fo[i].id;
}
if (!ctx->xv_format)
return -1;
{
#ifdef CONFIG_XF86VM
int vm = flags & VOFLAG_MODESWITCHING;
if (vm) {
vo_vm_switch(vo);
ctx->mode_switched = 1;
}
#endif
XGetWindowAttributes(x11->display, DefaultRootWindow(x11->display),
&attribs);
depth = attribs.depth;
if (depth != 15 && depth != 16 && depth != 24 && depth != 32)
depth = 24;
XMatchVisualInfo(x11->display, x11->screen, depth, TrueColor, &vinfo);
xswa.border_pixel = 0;
xswamask = CWBorderPixel;
if (x11->xv_ck_info.method == CK_METHOD_BACKGROUND) {
xswa.background_pixel = x11->xv_colorkey;
xswamask |= CWBackPixel;
}
vo_x11_create_vo_window(vo, &vinfo, vo->dx, vo->dy, vo->dwidth,
vo->dheight, flags, CopyFromParent, "xv");
XChangeWindowAttributes(x11->display, x11->window, xswamask, &xswa);
#ifdef CONFIG_XF86VM
if (vm) {
/* Grab the mouse pointer in our window */
if (vo_grabpointer)
XGrabPointer(x11->display, x11->window, True, 0, GrabModeAsync,
GrabModeAsync, x11->window, None, CurrentTime);
XSetInputFocus(x11->display, x11->window, RevertToNone,
CurrentTime);
}
#endif
}
mp_msg(MSGT_VO, MSGL_V, "using Xvideo port %d for hw scaling\n",
x11->xv_port);
// In case config has been called before
for (i = 0; i < ctx->total_buffers; i++)
deallocate_xvimage(vo, i);
ctx->num_buffers = 2;
ctx->total_buffers = ctx->num_buffers;
for (i = 0; i < ctx->total_buffers; i++)
allocate_xvimage(vo, i);
ctx->current_buf = 0;
ctx->current_ip_buf = 0;
resize(vo);
return 0;
}
static void allocate_xvimage(struct vo *vo, int foo)
{
struct xvctx *ctx = vo->priv;
struct vo_x11_state *x11 = vo->x11;
/*
* allocate XvImages. FIXME: no error checking, without
* mit-shm this will bomb... trzing to fix ::atmos
*/
#ifdef HAVE_SHM
if (x11->display_is_local && XShmQueryExtension(x11->display))
ctx->Shmem_Flag = 1;
else {
ctx->Shmem_Flag = 0;
mp_tmsg(MSGT_VO, MSGL_INFO, "[VO_XV] Shared memory not supported\nReverting to normal Xv.\n");
}
int aligned_w = FFALIGN(ctx->image_width, 32);
if (ctx->Shmem_Flag) {
ctx->xvimage[foo] =
(XvImage *) XvShmCreateImage(x11->display, x11->xv_port,
ctx->xv_format, NULL,
aligned_w, ctx->image_height,
&ctx->Shminfo[foo]);
ctx->Shminfo[foo].shmid = shmget(IPC_PRIVATE,
ctx->xvimage[foo]->data_size,
IPC_CREAT | 0777);
ctx->Shminfo[foo].shmaddr = (char *) shmat(ctx->Shminfo[foo].shmid, 0,
0);
ctx->Shminfo[foo].readOnly = False;
ctx->xvimage[foo]->data = ctx->Shminfo[foo].shmaddr;
XShmAttach(x11->display, &ctx->Shminfo[foo]);
XSync(x11->display, False);
shmctl(ctx->Shminfo[foo].shmid, IPC_RMID, 0);
} else
#endif
{
ctx->xvimage[foo] =
(XvImage *) XvCreateImage(x11->display, x11->xv_port,
ctx->xv_format, NULL, aligned_w,
ctx->image_height);
ctx->xvimage[foo]->data = av_malloc(ctx->xvimage[foo]->data_size);
XSync(x11->display, False);
}
struct mp_image img = get_xv_buffer(vo, foo);
vf_mpi_clear(&img, 0, 0, img.w, img.h);
return;
}
static void deallocate_xvimage(struct vo *vo, int foo)
{
struct xvctx *ctx = vo->priv;
#ifdef HAVE_SHM
if (ctx->Shmem_Flag) {
XShmDetach(vo->x11->display, &ctx->Shminfo[foo]);
shmdt(ctx->Shminfo[foo].shmaddr);
} else
#endif
{
av_free(ctx->xvimage[foo]->data);
}
XFree(ctx->xvimage[foo]);
XSync(vo->x11->display, False);
return;
}
static inline void put_xvimage(struct vo *vo, XvImage *xvi)
{
struct xvctx *ctx = vo->priv;
struct vo_x11_state *x11 = vo->x11;
struct mp_rect *src = &ctx->src_rect;
struct mp_rect *dst = &ctx->dst_rect;
int dw = dst->x1 - dst->x0, dh = dst->y1 - dst->y0;
int sw = src->x1 - src->x0, sh = src->y1 - src->y0;
#ifdef HAVE_SHM
if (ctx->Shmem_Flag) {
XvShmPutImage(x11->display, x11->xv_port, x11->window, x11->vo_gc, xvi,
src->x0, src->y0, sw, sh,
dst->x0, dst->y0, dw, dh,
False);
} else
#endif
{
XvPutImage(x11->display, x11->xv_port, x11->window, x11->vo_gc, xvi,
src->x0, src->y0, sw, sh,
dst->x0, dst->y0, dw, dh);
}
}
static struct mp_image get_xv_buffer(struct vo *vo, int buf_index)
{
struct xvctx *ctx = vo->priv;
XvImage *xv_image = ctx->xvimage[buf_index];
struct mp_image img = {0};
img.w = img.width = ctx->image_width;
img.h = img.height = ctx->image_height;
mp_image_setfmt(&img, ctx->image_format);
bool swapuv = ctx->image_format == IMGFMT_YV12;
for (int n = 0; n < img.num_planes; n++) {
int sn = n > 0 && swapuv ? (n == 1 ? 2 : 1) : n;
img.planes[n] = xv_image->data + xv_image->offsets[sn];
img.stride[n] = xv_image->pitches[sn];
}
mp_image_set_colorspace_details(&img, &ctx->cached_csp);
return img;
}
static void check_events(struct vo *vo)
{
int e = vo_x11_check_events(vo);
if (e & VO_EVENT_EXPOSE || e & VO_EVENT_RESIZE) {
resize(vo);
vo->want_redraw = true;
}
}
static void draw_osd(struct vo *vo, struct osd_state *osd)
{
struct xvctx *ctx = vo->priv;
struct mp_image img = get_xv_buffer(vo, ctx->current_buf);
struct mp_rect *src = &ctx->src_rect;
struct mp_rect *dst = &ctx->dst_rect;
int dw = dst->x1 - dst->x0, dh = dst->y1 - dst->y0;
int sw = src->x1 - src->x0, sh = src->y1 - src->y0;
double xvpar = (double)dw / dh * sh / sw;
struct mp_osd_res res = {
.w = ctx->image_width,
.h = ctx->image_height,
.display_par = vo->monitor_par / xvpar,
.video_par = vo->aspdat.par,
};
osd_draw_on_image_bk(osd, res, osd->vo_pts, 0, ctx->osd_backup, &img);
}
static int redraw_frame(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
struct mp_image img = get_xv_buffer(vo, ctx->visible_buf);
mp_draw_sub_backup_restore(ctx->osd_backup, &img);
ctx->current_buf = ctx->visible_buf;
return true;
}
static void flip_page(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
put_xvimage(vo, ctx->xvimage[ctx->current_buf]);
/* remember the currently visible buffer */
ctx->visible_buf = ctx->current_buf;
ctx->current_buf = (ctx->current_buf + 1) % ctx->num_buffers;
XFlush(vo->x11->display);
return;
}
static int draw_slice(struct vo *vo, uint8_t *image[], int stride[], int w,
int h, int x, int y)
{
struct xvctx *ctx = vo->priv;
uint8_t *dst;
XvImage *current_image = ctx->xvimage[ctx->current_buf];
dst = current_image->data + current_image->offsets[0]
+ current_image->pitches[0] * y + x;
memcpy_pic(dst, image[0], w, h, current_image->pitches[0], stride[0]);
x /= 2;
y /= 2;
w /= 2;
h /= 2;
dst = current_image->data + current_image->offsets[1]
+ current_image->pitches[1] * y + x;
if (ctx->image_format != IMGFMT_YV12)
memcpy_pic(dst, image[1], w, h, current_image->pitches[1], stride[1]);
else
memcpy_pic(dst, image[2], w, h, current_image->pitches[1], stride[2]);
dst = current_image->data + current_image->offsets[2]
+ current_image->pitches[2] * y + x;
if (ctx->image_format == IMGFMT_YV12)
memcpy_pic(dst, image[1], w, h, current_image->pitches[1], stride[1]);
else
memcpy_pic(dst, image[2], w, h, current_image->pitches[1], stride[2]);
mp_draw_sub_backup_reset(ctx->osd_backup);
return 0;
}
static mp_image_t *get_screenshot(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
struct mp_image img = get_xv_buffer(vo, ctx->visible_buf);
struct mp_image *res = alloc_mpi(img.w, img.h, img.imgfmt);
copy_mpi(res, &img);
vf_clone_mpi_attributes(res, &img);
// try to get an image without OSD
mp_draw_sub_backup_restore(ctx->osd_backup, res);
res->display_w = vo->aspdat.prew;
res->display_h = vo->aspdat.preh;
return res;
}
static uint32_t draw_image(struct vo *vo, mp_image_t *mpi)
{
struct xvctx *ctx = vo->priv;
if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)
; // done
else if (mpi->flags & MP_IMGFLAG_PLANAR)
draw_slice(vo, mpi->planes, mpi->stride, mpi->w, mpi->h, 0, 0);
else if (mpi->flags & MP_IMGFLAG_YUV)
// packed YUV:
memcpy_pic(ctx->xvimage[ctx->current_buf]->data +
ctx->xvimage[ctx->current_buf]->offsets[0], mpi->planes[0],
mpi->w * (mpi->bpp / 8), mpi->h,
ctx->xvimage[ctx->current_buf]->pitches[0], mpi->stride[0]);
else
return false;
mp_draw_sub_backup_reset(ctx->osd_backup);
return true;
}
static int query_format(struct xvctx *ctx, uint32_t format)
{
uint32_t i;
int flag = VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_OSD | VFCAP_ACCEPT_STRIDE; // FIXME! check for DOWN
/* check image formats */
for (i = 0; i < ctx->formats; i++) {
if (ctx->fo[i].id == format)
return flag; //xv_format = fo[i].id;
}
return 0;
}
static void uninit(struct vo *vo)
{
struct xvctx *ctx = vo->priv;
int i;
ctx->visible_buf = -1;
if (ctx->ai)
XvFreeAdaptorInfo(ctx->ai);
ctx->ai = NULL;
if (ctx->fo) {
XFree(ctx->fo);
ctx->fo = NULL;
}
for (i = 0; i < ctx->total_buffers; i++)
deallocate_xvimage(vo, i);
#ifdef CONFIG_XF86VM
if (ctx->mode_switched)
vo_vm_close(vo);
#endif
// uninit() shouldn't get called unless initialization went past vo_init()
vo_x11_uninit(vo);
}
static int preinit(struct vo *vo, const char *arg)
{
XvPortID xv_p;
int busy_ports = 0;
unsigned int i;
strarg_t ck_src_arg = { 0, NULL };
strarg_t ck_method_arg = { 0, NULL };
struct xvctx *ctx = talloc_zero(vo, struct xvctx);
vo->priv = ctx;
int xv_adaptor = -1;
if (!vo_init(vo))
return -1;
struct vo_x11_state *x11 = vo->x11;
const opt_t subopts[] =
{
/* name arg type arg var test */
{ "port", OPT_ARG_INT, &x11->xv_port, int_pos },
{ "adaptor", OPT_ARG_INT, &xv_adaptor, int_non_neg },
{ "ck", OPT_ARG_STR, &ck_src_arg, xv_test_ck },
{ "ck-method", OPT_ARG_STR, &ck_method_arg, xv_test_ckm },
{ NULL }
};
x11->xv_port = 0;
/* parse suboptions */
if (subopt_parse(arg, subopts) != 0) {
return -1;
}
/* modify colorkey settings according to the given options */
xv_setup_colorkeyhandling(vo, ck_method_arg.str, ck_src_arg.str);
/* check for Xvideo extension */
unsigned int ver, rel, req, ev, err;
if (Success != XvQueryExtension(x11->display, &ver, &rel, &req, &ev, &err)) {
mp_tmsg(MSGT_VO, MSGL_ERR, "[VO_XV] Sorry, Xv not supported by this X11 version/driver\n[VO_XV] ******** Try with -vo x11 *********\n");
goto error;
}
/* check for Xvideo support */
if (Success !=
XvQueryAdaptors(x11->display, DefaultRootWindow(x11->display),
&ctx->adaptors, &ctx->ai)) {
mp_tmsg(MSGT_VO, MSGL_ERR, "[VO_XV] XvQueryAdaptors failed.\n");
goto error;
}
/* check adaptors */
if (x11->xv_port) {
int port_found;
for (port_found = 0, i = 0; !port_found && i < ctx->adaptors; i++) {
if ((ctx->ai[i].type & XvInputMask)
&& (ctx->ai[i].type & XvImageMask)) {
for (xv_p = ctx->ai[i].base_id;
xv_p < ctx->ai[i].base_id + ctx->ai[i].num_ports;
++xv_p) {
if (xv_p == x11->xv_port) {
port_found = 1;
break;
}
}
}
}
if (port_found) {
if (XvGrabPort(x11->display, x11->xv_port, CurrentTime))
x11->xv_port = 0;
} else {
mp_tmsg(MSGT_VO, MSGL_WARN, "[VO_XV] Invalid port parameter, overriding with port 0.\n");
x11->xv_port = 0;
}
}
for (i = 0; i < ctx->adaptors && x11->xv_port == 0; i++) {
/* check if adaptor number has been specified */
if (xv_adaptor != -1 && xv_adaptor != i)
continue;
if ((ctx->ai[i].type & XvInputMask) && (ctx->ai[i].type & XvImageMask)) {
for (xv_p = ctx->ai[i].base_id;
xv_p < ctx->ai[i].base_id + ctx->ai[i].num_ports; ++xv_p)
if (!XvGrabPort(x11->display, xv_p, CurrentTime)) {
x11->xv_port = xv_p;
mp_msg(MSGT_VO, MSGL_V,
"[VO_XV] Using Xv Adapter #%d (%s)\n",
i, ctx->ai[i].name);
break;
} else {
mp_tmsg(MSGT_VO, MSGL_WARN, "[VO_XV] Could not grab port %i.\n",
(int) xv_p);
++busy_ports;
}
}
}
if (!x11->xv_port) {
if (busy_ports)
mp_tmsg(MSGT_VO, MSGL_ERR,
"[VO_XV] Could not find free Xvideo port - maybe another process is already\n"\
"[VO_XV] using it. Close all video applications, and try again. If that does\n"\
"[VO_XV] not help, see 'mpv -vo help' for other (non-xv) video out drivers.\n");
else
mp_tmsg(MSGT_VO, MSGL_ERR,
"[VO_XV] It seems there is no Xvideo support for your video card available.\n"\
"[VO_XV] Run 'xvinfo' to verify its Xv support and read\n"\
"[VO_XV] DOCS/HTML/en/video.html#xv!\n"\
"[VO_XV] See 'mpv -vo help' for other (non-xv) video out drivers.\n"\
"[VO_XV] Try -vo x11.\n");
goto error;
}
if (!vo_xv_init_colorkey(vo)) {
goto error; // bail out, colorkey setup failed
}
vo_xv_enable_vsync(vo);
vo_xv_get_max_img_dim(vo, &ctx->max_width, &ctx->max_height);
ctx->fo = XvListImageFormats(x11->display, x11->xv_port,
(int *) &ctx->formats);
ctx->osd_backup = talloc_steal(ctx, mp_draw_sub_backup_new());
return 0;
error:
uninit(vo); // free resources
return -1;
}
static int control(struct vo *vo, uint32_t request, void *data)
{
struct xvctx *ctx = vo->priv;
struct vo_x11_state *x11 = vo->x11;
switch (request) {
case VOCTRL_PAUSE:
return (ctx->is_paused = 1);
case VOCTRL_RESUME:
return (ctx->is_paused = 0);
case VOCTRL_QUERY_FORMAT:
return query_format(ctx, *((uint32_t *) data));
case VOCTRL_DRAW_IMAGE:
return draw_image(vo, data);
case VOCTRL_GET_PANSCAN:
return VO_TRUE;
case VOCTRL_FULLSCREEN:
vo_x11_fullscreen(vo);
/* indended, fallthrough to update panscan on fullscreen/windowed switch */
case VOCTRL_SET_PANSCAN:
resize(vo);
return VO_TRUE;
case VOCTRL_SET_EQUALIZER: {
vo->want_redraw = true;
struct voctrl_set_equalizer_args *args = data;
return vo_xv_set_eq(vo, x11->xv_port, args->name, args->value);
}
case VOCTRL_GET_EQUALIZER: {
struct voctrl_get_equalizer_args *args = data;
return vo_xv_get_eq(vo, x11->xv_port, args->name, args->valueptr);
}
case VOCTRL_SET_YUV_COLORSPACE:;
struct mp_csp_details* given_cspc = data;
int is_709 = given_cspc->format == MP_CSP_BT_709;
vo_xv_set_eq(vo, x11->xv_port, "bt_709", is_709 * 200 - 100);
read_xv_csp(vo);
vo->want_redraw = true;
return true;
case VOCTRL_GET_YUV_COLORSPACE:;
struct mp_csp_details* cspc = data;
read_xv_csp(vo);
*cspc = ctx->cached_csp;
return true;
case VOCTRL_ONTOP:
vo_x11_ontop(vo);
return VO_TRUE;
case VOCTRL_UPDATE_SCREENINFO:
update_xinerama_info(vo);
return VO_TRUE;
case VOCTRL_REDRAW_FRAME:
return redraw_frame(vo);
case VOCTRL_SCREENSHOT: {
struct voctrl_screenshot_args *args = data;
args->out_image = get_screenshot(vo);
return true;
}
}
return VO_NOTIMPL;
}
const struct vo_driver video_out_xv = {
.is_new = 1,
.info = &info,
.preinit = preinit,
.config = config,
.control = control,
.draw_slice = draw_slice,
.draw_osd = draw_osd,
.flip_page = flip_page,
.check_events = check_events,
.uninit = uninit
};
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