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mpv/video/out/vo_x11.c

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/*
* Original author: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <libswscale/swscale.h>
#include "config.h"
#include "vo.h"
#include "video/csputils.h"
#include "video/mp_image.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <errno.h>
#include "x11_common.h"
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include "sub/osd.h"
#include "sub/draw_bmp.h"
#include "video/sws_utils.h"
#include "video/fmt-conversion.h"
#include "common/msg.h"
#include "input/input.h"
#include "options/options.h"
#include "osdep/timer.h"
struct priv {
struct vo *vo;
struct mp_image *original_image;
XImage *myximage[2];
struct mp_image mp_ximages[2];
int depth;
GC gc;
uint32_t image_width;
uint32_t image_height;
struct mp_rect src;
struct mp_rect dst;
struct mp_osd_res osd;
struct mp_sws_context *sws;
XVisualInfo vinfo;
int current_buf;
int Shmem_Flag;
XShmSegmentInfo Shminfo[2];
int Shm_Warned_Slow;
};
static bool resize(struct vo *vo);
static bool getMyXImage(struct priv *p, int foo)
{
struct vo *vo = p->vo;
if (vo->x11->display_is_local && XShmQueryExtension(vo->x11->display)) {
p->Shmem_Flag = 1;
vo->x11->ShmCompletionEvent = XShmGetEventBase(vo->x11->display)
+ ShmCompletion;
} else {
p->Shmem_Flag = 0;
MP_WARN(vo, "Shared memory not supported\nReverting to normal Xlib\n");
}
if (p->Shmem_Flag) {
p->myximage[foo] =
XShmCreateImage(vo->x11->display, p->vinfo.visual, p->depth,
ZPixmap, NULL, &p->Shminfo[foo], p->image_width,
p->image_height);
if (p->myximage[foo] == NULL) {
MP_WARN(vo, "Shared memory error,disabling ( Ximage error )\n");
goto shmemerror;
}
p->Shminfo[foo].shmid = shmget(IPC_PRIVATE,
p->myximage[foo]->bytes_per_line *
p->myximage[foo]->height,
IPC_CREAT | 0777);
if (p->Shminfo[foo].shmid < 0) {
XDestroyImage(p->myximage[foo]);
MP_WARN(vo, "Shared memory error,disabling ( seg id error )\n");
goto shmemerror;
}
p->Shminfo[foo].shmaddr = (char *) shmat(p->Shminfo[foo].shmid, 0, 0);
if (p->Shminfo[foo].shmaddr == ((char *) -1)) {
XDestroyImage(p->myximage[foo]);
MP_WARN(vo, "Shared memory error,disabling ( address error )\n");
goto shmemerror;
}
p->myximage[foo]->data = p->Shminfo[foo].shmaddr;
p->Shminfo[foo].readOnly = False;
XShmAttach(vo->x11->display, &p->Shminfo[foo]);
XSync(vo->x11->display, False);
shmctl(p->Shminfo[foo].shmid, IPC_RMID, 0);
} else {
shmemerror:
p->Shmem_Flag = 0;
MP_VERBOSE(vo, "Not using SHM.\n");
p->myximage[foo] =
XCreateImage(vo->x11->display, p->vinfo.visual, p->depth, ZPixmap,
0, NULL, p->image_width, p->image_height, 8, 0);
if (!p->myximage[foo]) {
MP_WARN(vo, "could not allocate image");
return false;
}
p->myximage[foo]->data =
calloc(1, p->myximage[foo]->bytes_per_line * p->image_height + 32);
}
return true;
}
static void freeMyXImage(struct priv *p, int foo)
{
struct vo *vo = p->vo;
if (p->Shmem_Flag) {
XShmDetach(vo->x11->display, &p->Shminfo[foo]);
XDestroyImage(p->myximage[foo]);
shmdt(p->Shminfo[foo].shmaddr);
} else {
if (p->myximage[foo])
XDestroyImage(p->myximage[foo]);
}
p->myximage[foo] = NULL;
}
#define MAKE_MASK(comp) (((1ul << (comp).size) - 1) << (comp).offset)
static int reconfig(struct vo *vo, struct mp_image_params *fmt)
{
struct priv *p = vo->priv;
mp_image_unrefp(&p->original_image);
vo_x11_config_vo_window(vo);
if (!resize(vo))
return -1;
return 0;
}
static bool resize(struct vo *vo)
{
struct priv *p = vo->priv;
// Attempt to align. We don't know the size in bytes yet (????), so just
// assume worst case (1 byte per pixel).
int nw = MPMAX(1, MP_ALIGN_UP(vo->dwidth, MP_IMAGE_BYTE_ALIGN));
int nh = MPMAX(1, vo->dheight);
if (nw > p->image_width || nh > p->image_height) {
for (int i = 0; i < 2; i++)
freeMyXImage(p, i);
p->image_width = nw;
p->image_height = nh;
for (int i = 0; i < 2; i++) {
if (!getMyXImage(p, i)) {
p->image_width = 0;
p->image_height = 0;
return false;
}
}
}
int mpfmt = 0;
for (int fmt = IMGFMT_START; fmt < IMGFMT_END; fmt++) {
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
if ((desc.flags & MP_IMGFLAG_HAS_COMPS) && desc.num_planes == 1 &&
(desc.flags & MP_IMGFLAG_COLOR_MASK) == MP_IMGFLAG_COLOR_RGB &&
(desc.flags & MP_IMGFLAG_TYPE_MASK) == MP_IMGFLAG_TYPE_UINT &&
(desc.flags & MP_IMGFLAG_NE) && !(desc.flags & MP_IMGFLAG_ALPHA) &&
desc.bpp[0] <= 8 * sizeof(unsigned long) &&
p->myximage[0]->bits_per_pixel == desc.bpp[0] &&
p->myximage[0]->byte_order == MP_SELECT_LE_BE(LSBFirst, MSBFirst))
{
// desc.comps[] uses little endian bit offsets, so "swap" the
// offsets here.
if (MP_SELECT_LE_BE(0, 1)) {
// Except for formats that use byte swapping; for these, the
// offsets are in native endian. There is no way to distinguish
// which one a given format is (could even be both), and using
// mp_find_other_endian() is just a guess.
if (!mp_find_other_endian(fmt)) {
for (int c = 0; c < 3; c++) {
desc.comps[c].offset =
desc.bpp[0] - desc.comps[c].size -desc.comps[c].offset;
}
}
}
if (p->myximage[0]->red_mask == MAKE_MASK(desc.comps[0]) &&
p->myximage[0]->green_mask == MAKE_MASK(desc.comps[1]) &&
p->myximage[0]->blue_mask == MAKE_MASK(desc.comps[2]))
{
mpfmt = fmt;
break;
}
}
}
if (!mpfmt) {
MP_ERR(vo, "X server image format not supported, use another VO.\n");
return false;
}
MP_VERBOSE(vo, "Using mp format: %s\n", mp_imgfmt_to_name(mpfmt));
for (int i = 0; i < 2; i++) {
struct mp_image *img = &p->mp_ximages[i];
*img = (struct mp_image){0};
mp_image_setfmt(img, mpfmt);
mp_image_set_size(img, p->image_width, p->image_height);
img->planes[0] = p->myximage[i]->data;
img->stride[0] = p->myximage[i]->bytes_per_line;
mp_image_params_guess_csp(&img->params);
}
vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);
if (vo->params) {
p->sws->src = *vo->params;
p->sws->src.w = mp_rect_w(p->src);
p->sws->src.h = mp_rect_h(p->src);
p->sws->dst = p->mp_ximages[0].params;
p->sws->dst.w = mp_rect_w(p->dst);
p->sws->dst.h = mp_rect_h(p->dst);
if (mp_sws_reinit(p->sws) < 0)
return false;
}
vo->want_redraw = true;
return true;
}
static void Display_Image(struct priv *p, XImage *myximage)
{
struct vo *vo = p->vo;
XImage *x_image = p->myximage[p->current_buf];
if (p->Shmem_Flag) {
XShmPutImage(vo->x11->display, vo->x11->window, p->gc, x_image,
0, 0, 0, 0, vo->dwidth, vo->dheight, True);
vo->x11->ShmCompletionWaitCount++;
} else {
XPutImage(vo->x11->display, vo->x11->window, p->gc, x_image,
0, 0, 0, 0, vo->dwidth, vo->dheight);
}
}
static void wait_for_completion(struct vo *vo, int max_outstanding)
{
struct priv *ctx = vo->priv;
struct vo_x11_state *x11 = vo->x11;
if (ctx->Shmem_Flag) {
while (x11->ShmCompletionWaitCount > max_outstanding) {
if (!ctx->Shm_Warned_Slow) {
MP_WARN(vo, "can't keep up! Waiting"
" for XShm completion events...\n");
ctx->Shm_Warned_Slow = 1;
}
mp_sleep_us(1000);
vo_x11_check_events(vo);
}
}
}
static void flip_page(struct vo *vo)
{
struct priv *p = vo->priv;
Display_Image(p, p->myximage[p->current_buf]);
p->current_buf = (p->current_buf + 1) % 2;
}
// Note: REDRAW_FRAME can call this with NULL.
static void draw_image(struct vo *vo, mp_image_t *mpi)
{
struct priv *p = vo->priv;
wait_for_completion(vo, 1);
struct mp_image *img = &p->mp_ximages[p->current_buf];
if (mpi) {
mp_image_clear_rc_inv(img, p->dst);
struct mp_image src = *mpi;
struct mp_rect src_rc = p->src;
src_rc.x0 = MP_ALIGN_DOWN(src_rc.x0, src.fmt.align_x);
src_rc.y0 = MP_ALIGN_DOWN(src_rc.y0, src.fmt.align_y);
mp_image_crop_rc(&src, src_rc);
struct mp_image dst = *img;
mp_image_crop_rc(&dst, p->dst);
mp_sws_scale(p->sws, &dst, &src);
} else {
mp_image_clear(img, 0, 0, img->w, img->h);
}
osd_draw_on_image(vo->osd, p->osd, mpi ? mpi->pts : 0, 0, img);
if (mpi != p->original_image) {
talloc_free(p->original_image);
p->original_image = mpi;
}
}
static int query_format(struct vo *vo, int format)
{
struct priv *p = vo->priv;
if (mp_sws_supports_formats(p->sws, IMGFMT_RGB0, format))
return 1;
return 0;
}
static void uninit(struct vo *vo)
{
struct priv *p = vo->priv;
if (p->myximage[0])
freeMyXImage(p, 0);
if (p->myximage[1])
freeMyXImage(p, 1);
if (p->gc)
XFreeGC(vo->x11->display, p->gc);
talloc_free(p->original_image);
vo_x11_uninit(vo);
}
static int preinit(struct vo *vo)
{
struct priv *p = vo->priv;
p->vo = vo;
p->sws = mp_sws_alloc(vo);
p->sws->log = vo->log;
mp_sws_enable_cmdline_opts(p->sws, vo->global);
if (!vo_x11_init(vo))
goto error;
struct vo_x11_state *x11 = vo->x11;
XWindowAttributes attribs;
XGetWindowAttributes(x11->display, x11->rootwin, &attribs);
p->depth = attribs.depth;
if (!XMatchVisualInfo(x11->display, x11->screen, p->depth,
TrueColor, &p->vinfo))
goto error;
MP_VERBOSE(vo, "selected visual: %d\n", (int)p->vinfo.visualid);
if (!vo_x11_create_vo_window(vo, &p->vinfo, "x11"))
goto error;
p->gc = XCreateGC(x11->display, x11->window, 0, NULL);
MP_WARN(vo, "Warning: this legacy VO has bad performance. Consider fixing "
"your graphics drivers, or not forcing the x11 VO.\n");
return 0;
error:
uninit(vo);
return -1;
}
static int control(struct vo *vo, uint32_t request, void *data)
{
struct priv *p = vo->priv;
switch (request) {
case VOCTRL_SET_PANSCAN:
if (vo->config_ok)
resize(vo);
return VO_TRUE;
case VOCTRL_REDRAW_FRAME:
draw_image(vo, p->original_image);
return true;
}
int events = 0;
int r = vo_x11_control(vo, &events, request, data);
if (vo->config_ok && (events & (VO_EVENT_EXPOSE | VO_EVENT_RESIZE)))
resize(vo);
vo_event(vo, events);
return r;
}
const struct vo_driver video_out_x11 = {
.description = "X11 (software scaling)",
.name = "x11",
.priv_size = sizeof(struct priv),
.preinit = preinit,
.query_format = query_format,
.reconfig = reconfig,
.control = control,
.draw_image = draw_image,
.flip_page = flip_page,
.wakeup = vo_x11_wakeup,
.wait_events = vo_x11_wait_events,
.uninit = uninit,
};
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