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vo_drm: extract vt_switcher to drm_common

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This commit is contained in:
Marcin Kurczewski 2015-04-19 09:39:58 +02:00 committed by wm4
parent bd5d047c89
commit 34d5b73fbb
4 changed files with 226 additions and 132 deletions
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151
video/out/drm_common.c Normal file
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@ -0,0 +1,151 @@
/*
* This file is part of mpv.
*
* by rr- <rr-@sakuya.pl>
*
* 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 <errno.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/vt.h>
#include <unistd.h>
#include "drm_common.h"
#include "common/common.h"
#include "common/msg.h"
#include "osdep/io.h"
#define EVT_RELEASE 1
#define EVT_ACQUIRE 2
#define EVT_INTERRUPT 255
#define HANDLER_ACQUIRE 0
#define HANDLER_RELEASE 1
static int vt_switcher_pipe[2];
static void vt_switcher_sighandler(int sig)
{
unsigned char event = sig == SIGUSR1 ? EVT_RELEASE : EVT_ACQUIRE;
write(vt_switcher_pipe[1], &event, sizeof(event));
}
int vt_switcher_init(struct vt_switcher *s, struct mp_log *log)
{
s->log = log;
s->tty_fd = -1;
vt_switcher_pipe[0] = -1;
vt_switcher_pipe[1] = -1;
if (mp_make_cloexec_pipe(vt_switcher_pipe)) {
MP_ERR(s, "Creating pipe failed: %s", mp_strerror(errno));
return -1;
}
s->tty_fd = open("/dev/tty", O_RDWR | O_CLOEXEC);
if (s->tty_fd < 0) {
MP_ERR(s, "Can't open TTY for VT control: %s", mp_strerror(errno));
return -1;
}
struct sigaction act;
act.sa_handler = vt_switcher_sighandler;
act.sa_flags = SA_RESTART;
sigemptyset(&act.sa_mask);
sigaction(SIGUSR1, &act, 0);
sigaction(SIGUSR2, &act, 0);
struct vt_mode vt_mode;
if (ioctl(s->tty_fd, VT_GETMODE, &vt_mode) < 0) {
MP_ERR(s, "VT_GETMODE failed: %s", mp_strerror(errno));
return -1;
}
vt_mode.mode = VT_PROCESS;
vt_mode.relsig = SIGUSR1;
vt_mode.acqsig = SIGUSR2;
if (ioctl(s->tty_fd, VT_SETMODE, &vt_mode) < 0) {
MP_ERR(s, "VT_SETMODE failed: %s", mp_strerror(errno));
return -1;
}
return 0;
}
void vt_switcher_acquire(struct vt_switcher *s,
void (*handler)(void*), void *user_data)
{
s->handlers[HANDLER_ACQUIRE] = handler;
s->handler_data[HANDLER_ACQUIRE] = user_data;
}
void vt_switcher_release(struct vt_switcher *s,
void (*handler)(void*), void *user_data)
{
s->handlers[HANDLER_RELEASE] = handler;
s->handler_data[HANDLER_RELEASE] = user_data;
}
void vt_switcher_interrupt_poll(struct vt_switcher *s)
{
unsigned char event = EVT_INTERRUPT;
write(vt_switcher_pipe[1], &event, sizeof(event));
}
void vt_switcher_destroy(struct vt_switcher *s)
{
close(s->tty_fd);
close(vt_switcher_pipe[0]);
close(vt_switcher_pipe[1]);
}
void vt_switcher_poll(struct vt_switcher *s, int timeout_ms)
{
struct pollfd fds[1] = {
{ .events = POLLIN, .fd = vt_switcher_pipe[0] },
};
poll(fds, 1, timeout_ms);
if (!fds[0].revents) {
return;
}
unsigned char event;
if (read(fds[0].fd, &event, sizeof(event)) != sizeof(event)) {
return;
}
switch (event) {
case EVT_RELEASE:
s->handlers[HANDLER_RELEASE](s->handler_data[HANDLER_RELEASE]);
if (ioctl(s->tty_fd, VT_RELDISP, 1) < 0) {
MP_ERR(s, "Failed to release virtual terminal\n");
}
break;
case EVT_ACQUIRE:
s->handlers[HANDLER_ACQUIRE](s->handler_data[HANDLER_ACQUIRE]);
if (ioctl(s->tty_fd, VT_RELDISP, VT_ACKACQ) < 0) {
MP_ERR(s, "Failed to acquire virtual terminal\n");
}
break;
case EVT_INTERRUPT:
break;
}
}

36
video/out/drm_common.h Normal file
View File

@ -0,0 +1,36 @@
/*
* 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/>.
*/
#ifndef MP_VT_SWITCHER_H
#define MP_VT_SWITCHER_H
struct vt_switcher {
int tty_fd;
struct mp_log *log;
void (*handlers[2])(void*);
void *handler_data[2];
};
int vt_switcher_init(struct vt_switcher *s, struct mp_log *log);
void vt_switcher_destroy(struct vt_switcher *s);
void vt_switcher_poll(struct vt_switcher *s, int timeout_ms);
void vt_switcher_interrupt_poll(struct vt_switcher *s);
void vt_switcher_acquire(struct vt_switcher *s, void (*handler)(void*), void *user_data);
void vt_switcher_release(struct vt_switcher *s, void (*handler)(void*), void *user_data);
#endif

170
video/out/vo_drm.c
View File

@ -22,21 +22,18 @@
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stdbool.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/vt.h>
#include <unistd.h>
#include <libswscale/swscale.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "osdep/io.h"
#include "osdep/timer.h"
#include "drm_common.h"
#include "common/msg.h"
#include "osdep/timer.h"
#include "sub/osd.h"
#include "video/fmt-conversion.h"
#include "video/mp_image.h"
@ -44,14 +41,8 @@
#include "vo.h"
#define USE_MASTER 0
#define EVT_RELEASE 1
#define EVT_ACQUIRE 2
#define EVT_INTERRUPT 255
#define BUF_COUNT 2
static int setup_vo_crtc(struct vo *vo);
static void release_vo_crtc(struct vo *vo);
struct modeset_buf {
uint32_t width;
uint32_t height;
@ -71,11 +62,6 @@ struct modeset_dev {
int front_buf;
};
struct vt_switcher {
int tty_fd;
struct vo *vo;
};
struct priv {
int fd;
struct vt_switcher vt_switcher;
@ -350,119 +336,6 @@ end:
static int vt_switcher_pipe[2];
static void vt_switcher_sighandler(int sig)
{
unsigned char event = sig == SIGUSR1 ? EVT_RELEASE : EVT_ACQUIRE;
write(vt_switcher_pipe[1], &event, sizeof(event));
}
static void vt_switcher_interrupt(struct vt_switcher *s)
{
unsigned char event = EVT_INTERRUPT;
write(vt_switcher_pipe[1], &event, sizeof(event));
}
static int vt_switcher_init(struct vt_switcher *s, struct vo *vo)
{
s->tty_fd = -1;
vt_switcher_pipe[0] = -1;
vt_switcher_pipe[1] = -1;
s->vo = vo;
if (mp_make_cloexec_pipe(vt_switcher_pipe)) {
MP_ERR(vo, "Creating pipe failed: %s", mp_strerror(errno));
return -1;
}
s->tty_fd = open("/dev/tty", O_RDWR | O_CLOEXEC);
if (s->tty_fd < 0) {
MP_ERR(vo, "Can't open TTY for VT control: %s", mp_strerror(errno));
return -1;
}
struct sigaction act;
act.sa_handler = vt_switcher_sighandler;
act.sa_flags = SA_RESTART;
sigemptyset(&act.sa_mask);
sigaction(SIGUSR1, &act, 0);
sigaction(SIGUSR2, &act, 0);
struct vt_mode vt_mode;
if (ioctl(s->tty_fd, VT_GETMODE, &vt_mode) < 0) {
MP_ERR(vo, "VT_GETMODE failed: %s", mp_strerror(errno));
return -1;
}
vt_mode.mode = VT_PROCESS;
vt_mode.relsig = SIGUSR1;
vt_mode.acqsig = SIGUSR2;
if (ioctl(s->tty_fd, VT_SETMODE, &vt_mode) < 0) {
MP_ERR(vo, "VT_SETMODE failed: %s", mp_strerror(errno));
return -1;
}
return 0;
}
static void vt_switcher_destroy(struct vt_switcher *s)
{
close(s->tty_fd);
close(vt_switcher_pipe[0]);
close(vt_switcher_pipe[1]);
}
static void vt_switcher_poll(struct vt_switcher *s, int timeout_ms)
{
struct pollfd fds[1] = {
{ .events = POLLIN, .fd = vt_switcher_pipe[0] },
};
poll(fds, 1, timeout_ms);
if (!fds[0].revents) return;
unsigned char event;
if (read(fds[0].fd, &event, sizeof(event)) != sizeof(event)) return;
switch (event) {
case EVT_RELEASE:
release_vo_crtc(s->vo);
if (USE_MASTER) {
//this function enables support for switching to x, weston etc.
//however, for whatever reason, it can be called only by root users.
//until things change, this is commented.
struct priv *p = s->vo->priv;
if (drmDropMaster(p->fd)) {
MP_WARN(s->vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
}
}
if (ioctl(s->tty_fd, VT_RELDISP, 1) < 0) {
MP_ERR(s->vo, "Failed to release virtual terminal\n");
}
break;
case EVT_ACQUIRE:
if (USE_MASTER) {
struct priv *p = s->vo->priv;
if (drmSetMaster(p->fd)) {
MP_WARN(s->vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
}
}
setup_vo_crtc(s->vo);
if (ioctl(s->tty_fd, VT_RELDISP, VT_ACKACQ) < 0) {
MP_ERR(s->vo, "Failed to acquire virtual terminal\n");
}
break;
case EVT_INTERRUPT:
break;
}
}
static int setup_vo_crtc(struct vo *vo)
{
struct priv *p = vo->priv;
@ -491,6 +364,36 @@ static void release_vo_crtc(struct vo *vo)
}
}
static void release_vt(void *data)
{
struct vo *vo = data;
release_vo_crtc(vo);
if (USE_MASTER) {
//this function enables support for switching to x, weston etc.
//however, for whatever reason, it can be called only by root users.
//until things change, this is commented.
struct priv *p = vo->priv;
if (drmDropMaster(p->fd)) {
MP_WARN(vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
}
}
}
static void acquire_vt(void *data)
{
struct vo *vo = data;
if (USE_MASTER) {
struct priv *p = vo->priv;
if (drmSetMaster(p->fd)) {
MP_WARN(vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
}
}
setup_vo_crtc(vo);
}
static int wait_events(struct vo *vo, int64_t until_time_us)
{
struct priv *p = vo->priv;
@ -503,7 +406,7 @@ static int wait_events(struct vo *vo, int64_t until_time_us)
static void wakeup(struct vo *vo)
{
struct priv *p = vo->priv;
vt_switcher_interrupt(&p->vt_switcher);
vt_switcher_interrupt_poll(&p->vt_switcher);
}
static int reconfig(struct vo *vo, struct mp_image_params *params, int flags)
@ -621,9 +524,12 @@ static int preinit(struct vo *vo)
p->sws = mp_sws_alloc(vo);
p->fd = -1;
if (vt_switcher_init(&p->vt_switcher, vo))
if (vt_switcher_init(&p->vt_switcher, vo->log))
goto err;
vt_switcher_acquire(&p->vt_switcher, acquire_vt, vo);
vt_switcher_release(&p->vt_switcher, release_vt, vo);
if (modeset_open(vo, &p->fd, p->device_path))
goto err;

1
wscript_build.py
View File

@ -363,6 +363,7 @@ def build(ctx):
( "video/out/wayland/memfile.c", "wayland" ),
( "video/out/win_state.c"),
( "video/out/x11_common.c", "x11" ),
( "video/out/drm_common.c", "drm" ),
## osdep
( getch2_c ),