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mpv/video/out/vo_x11.c
wm4 2337e2861f vo_x11: don't call X11 "crap" 
X11 is in fact beautiful and superior to Wayland. Instead, just state
what the problem is in most cases: software scaling. (We have
accelerated X11 rendering in vo_gpu and others.)
2020-02-11 21:43:53 +01:00

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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];
int depth;
GC gc;
uint32_t image_width;
uint32_t image_height;
struct mp_rect src;
struct mp_rect dst;
int src_w, src_h;
int dst_w, dst_h;
struct mp_osd_res osd;
struct mp_sws_context *sws;
XVisualInfo vinfo;
int current_buf;
bool reset_view;
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;
}
const struct fmt_entry {
uint32_t mpfmt;
int depth;
int byte_order;
unsigned red_mask;
unsigned green_mask;
unsigned blue_mask;
} mp_to_x_fmt[] = {
{IMGFMT_0RGB, 32, MSBFirst, 0x00FF0000, 0x0000FF00, 0x000000FF},
{IMGFMT_0RGB, 32, LSBFirst, 0x0000FF00, 0x00FF0000, 0xFF000000},
{IMGFMT_0BGR, 32, MSBFirst, 0x000000FF, 0x0000FF00, 0x00FF0000},
{IMGFMT_0BGR, 32, LSBFirst, 0xFF000000, 0x00FF0000, 0x0000FF00},
{IMGFMT_RGB0, 32, MSBFirst, 0xFF000000, 0x00FF0000, 0x0000FF00},
{IMGFMT_RGB0, 32, LSBFirst, 0x000000FF, 0x0000FF00, 0x00FF0000},
{IMGFMT_BGR0, 32, MSBFirst, 0x0000FF00, 0x00FF0000, 0xFF000000},
{IMGFMT_BGR0, 32, LSBFirst, 0x00FF0000, 0x0000FF00, 0x000000FF},
{IMGFMT_RGB565, 16, LSBFirst, 0x0000F800, 0x000007E0, 0x0000001F},
{0}
};
static int reconfig(struct vo *vo, struct mp_image_params *fmt)
{
struct priv *p = vo->priv;
mp_image_unrefp(&p->original_image);
p->sws->src = *fmt;
vo_x11_config_vo_window(vo);
if (!resize(vo))
return -1;
return 0;
}
static bool resize(struct vo *vo)
{
struct priv *p = vo->priv;
for (int i = 0; i < 2; i++)
freeMyXImage(p, i);
vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);
p->src_w = p->src.x1 - p->src.x0;
p->src_h = p->src.y1 - p->src.y0;
p->dst_w = p->dst.x1 - p->dst.x0;
p->dst_h = p->dst.y1 - p->dst.y0;
// p->osd contains the parameters assuming OSD rendering in window
// coordinates, but OSD can only be rendered in the intersection
// between window and video rectangle (i.e. not into panscan borders).
p->osd.w = p->dst_w;
p->osd.h = p->dst_h;
p->osd.mt = MPMIN(0, p->osd.mt);
p->osd.mb = MPMIN(0, p->osd.mb);
p->osd.mr = MPMIN(0, p->osd.mr);
p->osd.ml = MPMIN(0, p->osd.ml);
mp_input_set_mouse_transform(vo->input_ctx, &p->dst, NULL);
p->image_width = (p->dst_w + 7) & (~7);
p->image_height = p->dst_h;
for (int i = 0; i < 2; i++) {
if (!getMyXImage(p, i))
return false;
}
const struct fmt_entry *fmte = mp_to_x_fmt;
while (fmte->mpfmt) {
if (fmte->depth == p->myximage[0]->bits_per_pixel &&
fmte->byte_order == p->myximage[0]->byte_order &&
fmte->red_mask == p->myximage[0]->red_mask &&
fmte->green_mask == p->myximage[0]->green_mask &&
fmte->blue_mask == p->myximage[0]->blue_mask)
break;
fmte++;
}
if (!fmte->mpfmt) {
MP_ERR(vo, "X server image format not supported, use another VO.\n");
return false;
}
p->sws->dst = (struct mp_image_params) {
.imgfmt = fmte->mpfmt,
.w = p->dst_w,
.h = p->dst_h,
.p_w = 1,
.p_h = 1,
};
mp_image_params_guess_csp(&p->sws->dst);
if (mp_sws_reinit(p->sws) < 0)
return false;
p->reset_view = true;
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->reset_view) {
XFillRectangle(vo->x11->display, vo->x11->window, p->gc, 0, 0, vo->dwidth, vo->dheight);
p->reset_view = false;
}
if (p->Shmem_Flag) {
XShmPutImage(vo->x11->display, vo->x11->window, p->gc, x_image,
0, 0, p->dst.x0, p->dst.y0, p->dst_w, p->dst_h,
True);
vo->x11->ShmCompletionWaitCount++;
} else {
XPutImage(vo->x11->display, vo->x11->window, p->gc, x_image,
0, 0, p->dst.x0, p->dst.y0, p->dst_w, p->dst_h);
}
}
static struct mp_image get_x_buffer(struct priv *p, int buf_index)
{
struct mp_image img = {0};
mp_image_set_params(&img, &p->sws->dst);
img.planes[0] = p->myximage[buf_index]->data;
img.stride[0] =
p->image_width * ((p->myximage[buf_index]->bits_per_pixel + 7) / 8);
return img;
}
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 = get_x_buffer(p, p->current_buf);
if (mpi) {
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);
mp_sws_scale(p->sws, &img, &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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