mpv/libvo/vo_xv.c

/* vo_xv.c, X11 Xv interface */

// Number of buffers _FOR_DOUBLEBUFFERING_MODE_
// Use option -double to enable double buffering! (default: single buffer)
#define NUM_BUFFERS 3

/*
Buffer allocation:

-nodr:
  1: TEMP
  2: 2*TEMP

-dr:
  1: TEMP
  3: 2*STATIC+TEMP
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

#include "config.h"
#include "options.h"
#include "talloc.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "video_out.h"
#include "libmpcodecs/vfcap.h"
#include "libmpcodecs/mp_image.h"
#include "osd.h"

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <errno.h>

#include "x11_common.h"

#include "fastmemcpy.h"
#include "sub.h"
#include "aspect.h"

#include "subopt-helper.h"

#include "input/input.h"
#include "mp_fifo.h"

#ifdef CONFIG_GUI
#include "gui/interface.h"
#endif

#include "libavutil/common.h"

static const vo_info_t info = {
    "X11/Xv",
    "xv",
    "Gerd Knorr <kraxel@goldbach.in-berlin.de> and others",
    ""
};

#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>

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 have_visible_image_copy;
    int have_next_image_copy;
    int visible_buf;
    XvImage *xvimage[NUM_BUFFERS + 1];
    uint32_t image_width;
    uint32_t image_height;
    uint32_t image_format;
    int is_paused;
    uint32_t drwX, drwY;
    uint32_t max_width, max_height; // zero means: not set
    int event_fd_registered; // for uninit called from preinit
    int mode_switched;
    void (*draw_alpha_fnc)(void *ctx, int x0, int y0, int w, int h,
                           unsigned char *src, unsigned char *srca,
                           int stride);
#ifdef HAVE_SHM
    XShmSegmentInfo Shminfo[NUM_BUFFERS];
    int Shmem_Flag;
#endif
};

static void allocate_xvimage(struct vo *, int);


static void draw_alpha_yv12(void *p, int x0, int y0, int w, int h,
                            unsigned char *src, unsigned char *srca,
                            int stride)
{
    struct vo *vo = p;
    struct xvctx *ctx = vo->priv;
    x0 += ctx->image_width * (vo->panscan_x >> 1)
                           / (vo->dwidth + vo->panscan_x);
    vo_draw_alpha_yv12(w, h, src, srca, stride,
                       ctx->xvimage[ctx->current_buf]->data +
                       ctx->xvimage[ctx->current_buf]->offsets[0] +
                       ctx->xvimage[ctx->current_buf]->pitches[0] * y0 + x0,
                       ctx->xvimage[ctx->current_buf]->pitches[0]);
}

static void draw_alpha_yuy2(void *p, int x0, int y0, int w, int h,
                            unsigned char *src, unsigned char *srca,
                            int stride)
{
    struct vo *vo = p;
    struct xvctx *ctx = vo->priv;
    x0 += ctx->image_width * (vo->panscan_x >> 1)
                           / (vo->dwidth + vo->panscan_x);
    vo_draw_alpha_yuy2(w, h, src, srca, stride,
                       ctx->xvimage[ctx->current_buf]->data +
                       ctx->xvimage[ctx->current_buf]->offsets[0] +
                       ctx->xvimage[ctx->current_buf]->pitches[0] * y0 + 2 * x0,
                       ctx->xvimage[ctx->current_buf]->pitches[0]);
}

static void draw_alpha_uyvy(void *p, int x0, int y0, int w, int h,
                            unsigned char *src, unsigned char *srca,
                            int stride)
{
    struct vo *vo = p;
    struct xvctx *ctx = vo->priv;
    x0 += ctx->image_width * (vo->panscan_x >> 1)
                           / (vo->dwidth + vo->panscan_x);
    vo_draw_alpha_yuy2(w, h, src, srca, stride,
                       ctx->xvimage[ctx->current_buf]->data +
                       ctx->xvimage[ctx->current_buf]->offsets[0] +
                       ctx->xvimage[ctx->current_buf]->pitches[0] * y0 + 2 * x0 + 1,
                       ctx->xvimage[ctx->current_buf]->pitches[0]);
}

static void draw_alpha_null(void *p, int x0, int y0, int w, int h,
                            unsigned char *src, unsigned char *srca,
                            int stride)
{
}


static void deallocate_xvimage(struct vo *vo, int foo);

static void calc_drwXY(struct vo *vo, uint32_t *drwX, uint32_t *drwY)
{
    struct MPOpts *opts = vo->opts;
    *drwX = *drwY = 0;
    if (vo_fs) {
        aspect(vo, &vo->dwidth, &vo->dheight, A_ZOOM);
        vo->dwidth = FFMIN(vo->dwidth, opts->vo_screenwidth);
        vo->dheight = FFMIN(vo->dheight, opts->vo_screenheight);
        *drwX = (opts->vo_screenwidth - vo->dwidth) / 2;
        *drwY = (opts->vo_screenheight - vo->dheight) / 2;
        mp_msg(MSGT_VO, MSGL_V, "[xv-fs] dx: %d dy: %d dw: %d dh: %d\n", *drwX,
               *drwY, vo->dwidth, vo->dheight);
    } else if (WinID == 0) {
        *drwX = vo->dx;
        *drwY = vo->dy;
    }
}

/*
 * 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,
                  char *title, uint32_t format)
{
    struct MPOpts *opts = vo->opts;
    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_msg(MSGT_VO, MSGL_ERR, MSGTR_VO_XV_ImagedimTooHigh,
               ctx->image_width, ctx->image_height, ctx->max_width,
               ctx->max_height);
        return -1;
    }

    ctx->is_paused = 0;
    ctx->visible_buf = -1;
    ctx->have_visible_image_copy = false;
    ctx->have_next_image_copy = false;

    /* 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_GUI
    if (use_gui)
        guiGetEvent(guiSetShVideo, 0);  // the GUI will set up / resize the window
    else
#endif
    {
#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.background_pixel = 0;
        if (x11->xv_ck_info.method == CK_METHOD_BACKGROUND)
            xswa.background_pixel = x11->xv_colorkey;
        xswa.border_pixel = 0;
        xswamask = CWBackPixel | CWBorderPixel;

        vo_x11_create_vo_window(vo, &vinfo, vo->dx, vo->dy, vo->dwidth,
                                vo->dheight, flags, CopyFromParent, "xv",
                                title);
        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);

    switch (ctx->xv_format) {
    case IMGFMT_YV12:
    case IMGFMT_I420:
    case IMGFMT_IYUV:
        ctx->draw_alpha_fnc = draw_alpha_yv12;
        break;
    case IMGFMT_YUY2:
    case IMGFMT_YVYU:
        ctx->draw_alpha_fnc = draw_alpha_yuy2;
        break;
    case IMGFMT_UYVY:
        ctx->draw_alpha_fnc = draw_alpha_uyvy;
        break;
    default:
        ctx->draw_alpha_fnc = draw_alpha_null;
    }

    // In case config has been called before
    for (i = 0; i < ctx->total_buffers; i++)
        deallocate_xvimage(vo, i);

    ctx->num_buffers =
        vo_doublebuffering ? (vo_directrendering ? NUM_BUFFERS : 2) : 1;
    ctx->total_buffers = ctx->num_buffers + 1;

    for (i = 0; i < ctx->total_buffers; i++)
        allocate_xvimage(vo, i);

    ctx->current_buf = 0;
    ctx->current_ip_buf = 0;

    if ((flags & VOFLAG_FULLSCREEN) && WinID <= 0)
        vo_fs = 1;
    calc_drwXY(vo, &ctx->drwX, &ctx->drwY);

    panscan_calc(vo);

    vo_xv_draw_colorkey(vo, ctx->drwX - (vo->panscan_x >> 1),
                        ctx->drwY - (vo->panscan_y >> 1),
                        vo->dwidth + vo->panscan_x - 1,
                        vo->dheight + vo->panscan_y - 1);

    mp_msg(MSGT_VO, MSGL_V, "[xv] dx: %d dy: %d dw: %d dh: %d\n", ctx->drwX,
           ctx->drwY, vo->dwidth, vo->dheight);

    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_msg(MSGT_VO, MSGL_INFO, MSGTR_LIBVO_XV_SharedMemoryNotSupported);
    }
    if (ctx->Shmem_Flag) {
        ctx->xvimage[foo] =
            (XvImage *) XvShmCreateImage(x11->display, x11->xv_port,
                                         ctx->xv_format, NULL,
                                         ctx->image_width, 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, ctx->image_width,
                                      ctx->image_height);
        ctx->xvimage[foo]->data = malloc(ctx->xvimage[foo]->data_size);
        XSync(x11->display, False);
    }
    memset(ctx->xvimage[foo]->data, 128, ctx->xvimage[foo]->data_size);
    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
    {
        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;
#ifdef HAVE_SHM
    if (ctx->Shmem_Flag) {
        XvShmPutImage(x11->display, x11->xv_port, x11->window, x11->vo_gc, xvi,
                      0, 0, ctx->image_width, ctx->image_height,
                      ctx->drwX - (vo->panscan_x >> 1),
                      ctx->drwY - (vo->panscan_y >> 1),
                      vo->dwidth + vo->panscan_x, vo->dheight + vo->panscan_y,
                      False);
    } else
#endif
    {
        XvPutImage(x11->display, x11->xv_port, x11->window, x11->vo_gc, xvi, 0,
                   0, ctx->image_width, ctx->image_height,
                   ctx->drwX - (vo->panscan_x >> 1),
                   ctx->drwY - (vo->panscan_y >> 1),
                   vo->dwidth + vo->panscan_x, vo->dheight + vo->panscan_y);
    }
}

// Only copies luma for planar formats as draw_alpha doesn't change others */
void copy_backup_image(struct vo *vo, int dest, int src)
{
    struct xvctx *ctx = vo->priv;

    XvImage *vb = ctx->xvimage[dest];
    XvImage *cp = ctx->xvimage[src];
    memcpy_pic(vb->data + vb->offsets[0], cp->data + cp->offsets[0],
               vb->width, vb->height,
               vb->pitches[0], cp->pitches[0]);
}

static void check_events(struct vo *vo)
{
    struct xvctx *ctx = vo->priv;
    struct vo_x11_state *x11 = vo->x11;
    int e = vo_x11_check_events(vo);

    if (e & VO_EVENT_RESIZE)
        calc_drwXY(vo, &ctx->drwX, &ctx->drwY);

    if (e & VO_EVENT_EXPOSE || e & VO_EVENT_RESIZE) {
        vo_xv_draw_colorkey(vo, ctx->drwX - (vo->panscan_x >> 1),
                            ctx->drwY - (vo->panscan_y >> 1),
                            vo->dwidth + vo->panscan_x - 1,
                            vo->dheight + vo->panscan_y - 1);
    }

    if ((e & VO_EVENT_EXPOSE || e & VO_EVENT_RESIZE) && ctx->is_paused) {
        /* did we already draw a buffer */
        if (ctx->visible_buf != -1) {
            /* redraw the last visible buffer */
            put_xvimage(vo, ctx->xvimage[ctx->visible_buf]);
        }
    }
}

static void draw_osd(struct vo *vo, struct osd_state *osd)
{
    struct xvctx *ctx = vo->priv;

    osd_draw_text(osd,
                  ctx->image_width -
                  ctx->image_width * vo->panscan_x / (vo->dwidth +
                                                      vo->panscan_x),
                  ctx->image_height, ctx->draw_alpha_fnc, vo);
}

static int redraw_osd(struct vo *vo, struct osd_state *osd)
{
    struct xvctx *ctx = vo->priv;

    // Could check if OSD was empty
    if (!ctx->have_visible_image_copy)
        return false;

    copy_backup_image(vo, ctx->visible_buf, ctx->num_buffers);
    int temp = ctx->current_buf;
    ctx->current_buf = ctx->visible_buf;
    draw_osd(vo, osd);
    ctx->current_buf = temp;
    put_xvimage(vo, ctx->xvimage[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->have_visible_image_copy = ctx->have_next_image_copy;
    ctx->have_next_image_copy = false;

    if (ctx->num_buffers > 1) {
        ctx->current_buf = vo_directrendering ? 0 : ((ctx->current_buf + 1) %
                                                     ctx->num_buffers);
        XFlush(vo->x11->display);
    } else
        XSync(vo->x11->display, False);
    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]);

    return 0;
}

static int draw_frame(struct vo *vo, uint8_t *src[])
{
    return VO_ERROR;
}

static uint32_t draw_image(struct vo *vo, mp_image_t *mpi)
{
    struct xvctx *ctx = vo->priv;

    ctx->have_next_image_copy = false;

    if (mpi->flags & MP_IMGFLAG_DIRECT)
        // direct rendering:
        ctx->current_buf = (int) (mpi->priv);        // hack!
    else 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;

    if (ctx->is_paused) {
        copy_backup_image(vo, ctx->num_buffers, ctx->current_buf);
        ctx->have_next_image_copy = true;
    }
    return true;
}

static uint32_t get_image(struct xvctx *ctx, mp_image_t *mpi)
{
    // we shouldn't change current_buf unless we do DR!
    int buf = ctx->current_buf;

    if (mpi->type == MP_IMGTYPE_STATIC && ctx->num_buffers > 1)
        return VO_FALSE;        // it is not static
    if (mpi->imgfmt != ctx->image_format)
        return VO_FALSE;        // needs conversion :(
    if (mpi->flags & MP_IMGFLAG_READABLE
        && (mpi->type == MP_IMGTYPE_IPB || mpi->type == MP_IMGTYPE_IP)) {
        // reference (I/P) frame of IP or IPB:
        if (ctx->num_buffers < 2)
            return VO_FALSE;    // not enough
        ctx->current_ip_buf ^= 1;
        // for IPB with 2 buffers we can DR only one of the 2 P frames:
        if (mpi->type == MP_IMGTYPE_IPB && ctx->num_buffers < 3
            && ctx->current_ip_buf)
            return VO_FALSE;
        buf = ctx->current_ip_buf;
        if (mpi->type == MP_IMGTYPE_IPB)
            ++buf;              // preserve space for B
    }
    if (mpi->height > ctx->xvimage[buf]->height)
        return VO_FALSE;        //buffer to small
    if (mpi->width * (mpi->bpp / 8) > ctx->xvimage[buf]->pitches[0])
        return VO_FALSE;        //buffer to small
    if ((mpi->flags & (MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_ACCEPT_WIDTH))
        || (mpi->width * (mpi->bpp / 8) == ctx->xvimage[buf]->pitches[0])) {
        ctx->current_buf = buf;
        XvImage *current_image = ctx->xvimage[ctx->current_buf];
        mpi->planes[0] = current_image->data + current_image->offsets[0];
        mpi->stride[0] = current_image->pitches[0];
        mpi->width = mpi->stride[0] / (mpi->bpp / 8);
        if (mpi->flags & MP_IMGFLAG_PLANAR) {
            if (mpi->flags & MP_IMGFLAG_SWAPPED) {
                // I420
                mpi->planes[1] = current_image->data
                               + current_image->offsets[1];
                mpi->planes[2] = current_image->data
                               + current_image->offsets[2];
                mpi->stride[1] = current_image->pitches[1];
                mpi->stride[2] = current_image->pitches[2];
            } else {
                // YV12
                mpi->planes[1] = current_image->data
                               + current_image->offsets[2];
                mpi->planes[2] = current_image->data
                               + current_image->offsets[1];
                mpi->stride[1] = current_image->pitches[2];
                mpi->stride[2] = current_image->pitches[1];
            }
        }
        mpi->flags |= MP_IMGFLAG_DIRECT;
        mpi->priv = (void *) ctx->current_buf;
        return VO_TRUE;
    }
    return VO_FALSE;
}

static int query_format(struct xvctx *ctx, uint32_t format)
{
    uint32_t i;
    int flag = VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_HWSCALE_UP | VFCAP_HWSCALE_DOWN | 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
    if (ctx->event_fd_registered)
        mp_input_rm_key_fd(vo->input_ctx, ConnectionNumber(vo->x11->display));
    // uninit() shouldn't get called unless initialization went past vo_init()
    vo_x11_uninit(vo);
}

static int x11_fd_callback(void *ctx, int fd)
{
    struct vo *vo = ctx;
    check_events(vo);
    return mplayer_get_key(vo->key_fifo, 0);
}

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;
    struct vo_x11_state *x11 = vo->x11;
    int xv_adaptor = -1;

    opt_t subopts[] = {
        /* name         arg type     arg var         test */
        {"port", OPT_ARG_INT, &x11->xv_port, (opt_test_f) int_pos},
        {"adaptor", OPT_ARG_INT, &xv_adaptor, (opt_test_f) 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);

    if (!vo_init(vo))
        return -1;

    /* check for Xvideo extension */
    unsigned int ver, rel, req, ev, err;
    if (Success != XvQueryExtension(x11->display, &ver, &rel, &req, &ev, &err)) {
        mp_msg(MSGT_VO, MSGL_ERR, MSGTR_LIBVO_XV_XvNotSupportedByX11);
        goto error;
    }

    /* check for Xvideo support */
    if (Success !=
        XvQueryAdaptors(x11->display, DefaultRootWindow(x11->display),
                        &ctx->adaptors, &ctx->ai)) {
        mp_msg(MSGT_VO, MSGL_ERR, MSGTR_LIBVO_XV_XvQueryAdaptorsFailed);
        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_msg(MSGT_VO, MSGL_WARN, MSGTR_LIBVO_XV_InvalidPortParameter);
            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_msg(MSGT_VO, MSGL_WARN, MSGTR_LIBVO_XV_CouldNotGrabPort,
                           (int) xv_p);
                    ++busy_ports;
                }
        }
    }
    if (!x11->xv_port) {
        if (busy_ports)
            mp_msg(MSGT_VO, MSGL_ERR, MSGTR_LIBVO_XV_CouldNotFindFreePort);
        else
            mp_msg(MSGT_VO, MSGL_ERR, MSGTR_LIBVO_XV_NoXvideoSupport);
        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);

    mp_input_add_key_fd(vo->input_ctx, ConnectionNumber(x11->display), 1,
                        x11_fd_callback, NULL, vo);
    ctx->event_fd_registered = 1;
    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_GET_IMAGE:
        return get_image(ctx, data);
    case VOCTRL_DRAW_IMAGE:
        return draw_image(vo, data);
    case VOCTRL_GUISUPPORT:
        return VO_TRUE;
    case VOCTRL_GET_PANSCAN:
        if (!vo->config_ok || !vo_fs)
            return VO_FALSE;
        return VO_TRUE;
    case VOCTRL_FULLSCREEN:
        vo_x11_fullscreen(vo);
        /* indended, fallthrough to update panscan on fullscreen/windowed switch */
    case VOCTRL_SET_PANSCAN:
        if ((vo_fs && (vo_panscan != vo->panscan_amount))
            || (!vo_fs && vo->panscan_amount)) {
            int old_y = vo->panscan_y;

            panscan_calc(vo);

            if (old_y != vo->panscan_y) {
                vo_x11_clearwindow_part(vo, x11->window,
                                        vo->dwidth + vo->panscan_x - 1,
                                        vo->dheight + vo->panscan_y - 1, 1);
                vo_xv_draw_colorkey(vo, ctx->drwX - (vo->panscan_x >> 1),
                                    ctx->drwY - (vo->panscan_y >> 1),
                                    vo->dwidth + vo->panscan_x - 1,
                                    vo->dheight + vo->panscan_y - 1);
                flip_page(vo);
            }
        }
        return VO_TRUE;
    case VOCTRL_SET_EQUALIZER:
        {
            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_ONTOP:
        vo_x11_ontop(vo);
        return VO_TRUE;
    case VOCTRL_UPDATE_SCREENINFO:
        update_xinerama_info(vo);
        return VO_TRUE;
    case VOCTRL_REDRAW_OSD:
        return redraw_osd(vo, data);
    }
    return VO_NOTIMPL;
}

const struct vo_driver video_out_xv = {
    .is_new = 1,
    .info = &info,
    .preinit = preinit,
    .config = config,
    .control = control,
    .draw_frame = draw_frame,
    .draw_slice = draw_slice,
    .draw_osd = draw_osd,
    .flip_page = flip_page,
    .check_events = check_events,
    .uninit = uninit
};