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mpv/video/out/vo_wayland.c

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/*
* This file is part of mpv video player.
* Copyright © 2013 Alexander Preisinger <alexander.preisinger@gmail.com>
*
* 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <libavutil/common.h>
#include "config.h"
#include "vo.h"
#include "sub/sub.h"
#include "video/vfcap.h"
#include "video/mp_image.h"
#include "mpvcore/mp_msg.h"
#include "video/sws_utils.h"
#include "wayland_common.h"
#include "wayland-version.h"
#define MAX_BUFFERS 2
// minium target version for the new formats (1.2.90)
#define MINIMUM_VERSION (1 << 16 | 2 << 8 | 90)
#define CURRENT_VERSION (WAYLAND_VERSION_MAJOR << 16 | \
WAYLAND_VERSION_MINOR << 8 | \
WAYLAND_VERSION_MICRO)
static void draw_image(struct vo *vo, mp_image_t *mpi);
static const struct wl_callback_listener frame_listener;
static const struct wl_buffer_listener buffer_listener;
static const struct wl_shm_listener shm_listener;
struct fmtentry {
enum wl_shm_format wl_fmt;
enum mp_imgfmt mp_fmt;
};
// the first 2 Formats should be available on most platforms
// all other formats are optional
// the waylad byte order is reversed
static const struct fmtentry fmttable[] = {
{WL_SHM_FORMAT_ARGB8888, IMGFMT_BGRA}, // 8b 8g 8r 8a
{WL_SHM_FORMAT_XRGB8888, IMGFMT_BGR0},
#if CURRENT_VERSION >= MINIMUM_VERSION
{WL_SHM_FORMAT_RGB332, IMGFMT_BGR8}, // 3b 3g 2r
{WL_SHM_FORMAT_BGR233, IMGFMT_RGB8}, // 3r 3g 3b,
{WL_SHM_FORMAT_XRGB4444, IMGFMT_BGR12_LE}, // 4b 4g 4r 4a
{WL_SHM_FORMAT_XBGR4444, IMGFMT_RGB12_LE}, // 4r 4g 4b 4a
{WL_SHM_FORMAT_RGBX4444, IMGFMT_RGB12_BE}, // 4a 4b 4g 4r
{WL_SHM_FORMAT_BGRX4444, IMGFMT_BGR12_BE}, // 4a 4r 4g 4b
{WL_SHM_FORMAT_ARGB4444, IMGFMT_BGR12_LE},
{WL_SHM_FORMAT_ABGR4444, IMGFMT_RGB12_LE},
{WL_SHM_FORMAT_RGBA4444, IMGFMT_RGB12_BE},
{WL_SHM_FORMAT_BGRA4444, IMGFMT_BGR12_BE},
{WL_SHM_FORMAT_XRGB1555, IMGFMT_BGR15_LE}, // 5b 5g 5r 1a
{WL_SHM_FORMAT_XBGR1555, IMGFMT_RGB15_LE}, // 5r 5g 5b 1a
{WL_SHM_FORMAT_RGBX5551, IMGFMT_RGB15_BE}, // 1a 5g 5b 5r
{WL_SHM_FORMAT_BGRX5551, IMGFMT_BGR15_BE}, // 1a 5r 5g 5b
{WL_SHM_FORMAT_ARGB1555, IMGFMT_BGR15_LE},
{WL_SHM_FORMAT_ABGR1555, IMGFMT_RGB15_LE},
{WL_SHM_FORMAT_RGBA5551, IMGFMT_RGB15_BE},
{WL_SHM_FORMAT_BGRA5551, IMGFMT_BGR15_BE},
{WL_SHM_FORMAT_RGB565, IMGFMT_BGR16_LE}, // 5b 6g 5r
{WL_SHM_FORMAT_BGR565, IMGFMT_RGB16_LE}, // 5r 6g 5b
{WL_SHM_FORMAT_RGB888, IMGFMT_BGR24}, // 8b 8g 8r
{WL_SHM_FORMAT_BGR888, IMGFMT_RGB24}, // 8r 8g 8b
{WL_SHM_FORMAT_XBGR8888, IMGFMT_RGB0},
{WL_SHM_FORMAT_RGBX8888, IMGFMT_0BGR},
{WL_SHM_FORMAT_BGRX8888, IMGFMT_0RGB},
{WL_SHM_FORMAT_ABGR8888, IMGFMT_RGBA},
{WL_SHM_FORMAT_RGBA8888, IMGFMT_ABGR},
{WL_SHM_FORMAT_BGRA8888, IMGFMT_ARGB},
#endif
};
#define MAX_FORMAT_ENTRIES (sizeof(fmttable) / sizeof(fmttable[0]))
#define DEFAULT_FORMAT_ENTRY 1
#define DEFAULT_ALPHA_FORMAT_ENTRY 0
struct buffer {
struct wl_buffer *wlbuf;
bool is_busy;
bool is_new;
void *shm_data;
size_t shm_size;
};
struct supported_format {
const struct fmtentry *fmt;
bool is_alpha;
struct wl_list link;
};
struct priv {
struct vo *vo;
struct vo_wayland_state *wl;
struct wl_list format_list;
const struct fmtentry *pref_format;
int bytes_per_pixel;
int stride;
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;
struct mp_image_params in_format;
struct wl_callback *redraw_callback;
struct buffer buffers[MAX_BUFFERS];
struct buffer *front_buffer;
struct buffer *back_buffer;
struct buffer tmp_buffer;
struct mp_image *original_image;
int width; // width of the original image
int height;
int x, y; // coords for resizing
bool resize_attach;
// options
int enable_alpha;
int use_default;
};
/* copied from weston clients */
static int set_cloexec_or_close(int fd)
{
long flags;
if (fd == -1)
return -1;
if ((flags = fcntl(fd, F_GETFD)) == -1)
goto err;
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
goto err;
return fd;
err:
close(fd);
return -1;
}
static int create_tmpfile_cloexec(char *tmpname)
{
int fd;
#ifdef HAVE_MKOSTEMP
fd = mkostemp(tmpname, O_CLOEXEC);
if (fd >= 0)
unlink(tmpname);
#else
fd = mkstemp(tmpname);
if (fd >= 0) {
fd = set_cloexec_or_close(fd);
unlink(tmpname);
}
#endif
return fd;
}
static int os_create_anonymous_file(off_t size)
{
static const char template[] = "/mpv-temp-XXXXXX";
const char *path;
char *name;
int fd;
path = getenv("XDG_RUNTIME_DIR");
if (!path) {
errno = ENOENT;
return -1;
}
name = malloc(strlen(path) + sizeof(template));
if (!name)
return -1;
strcpy(name, path);
strcat(name, template);
fd = create_tmpfile_cloexec(name);
free(name);
if (fd < 0)
return -1;
if (ftruncate(fd, size) < 0) {
close(fd);
return -1;
}
return fd;
}
static bool is_alpha_format(const struct fmtentry *fmt)
{
return !!(mp_imgfmt_get_desc(fmt->mp_fmt).flags & MP_IMGFLAG_ALPHA);
}
static void buffer_swap(struct priv *p)
{
if (!p->back_buffer->is_new)
return;
struct buffer *tmp = p->back_buffer;
p->back_buffer = p->front_buffer;
p->front_buffer = tmp;
// after swap set is_new to false, but keep busy
p->back_buffer->is_new = false;
}
// returns NULL if the back_buffer contains a new image or if the back buffer
// is busy (unlikely)
static struct buffer * buffer_get_back(struct priv *p)
{
if (p->back_buffer->is_new || p->back_buffer->is_busy)
return NULL;
p->back_buffer->is_busy = true;
return p->back_buffer;
}
static bool buffer_finalise_back(struct priv *p)
{
p->back_buffer->is_new = true;
p->back_buffer->is_busy = false;
return true;
}
static struct buffer * buffer_get_front(struct priv *p)
{
p->front_buffer->is_busy = true;
return p->front_buffer;
}
static bool buffer_finalise_front(struct priv *p)
{
p->front_buffer->is_new = false; // is_busy is reset on handle_release
return true;
}
static struct mp_image buffer_get_mp_image(struct priv *p, struct buffer *buf)
{
struct mp_image img = {0};
mp_image_set_params(&img, &p->sws->dst);
img.planes[0] = buf->shm_data;
img.stride[0] = p->stride;
return img;
}
static bool create_shm_buffer(struct priv *p,
struct buffer *buffer,
int width,
int height,
uint32_t format)
{
struct wl_shm_pool *pool;
int fd, size;
void *data;
p->stride = FFALIGN(width * p->bytes_per_pixel, SWS_MIN_BYTE_ALIGN);
size = p->stride * height;
fd = os_create_anonymous_file(size);
if (fd < 0) {
MP_ERR(p->wl, "creating a buffer file for %d B failed: %m", size);
return false;
}
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
MP_ERR(p->wl, "mmap failed: %m\n");
close(fd);
return false;
}
pool = wl_shm_create_pool(p->wl->display.shm, fd, size);
buffer->wlbuf = wl_shm_pool_create_buffer(pool, 0, width, height,
p->stride, format);
wl_buffer_add_listener(buffer->wlbuf, &buffer_listener, buffer);
wl_shm_pool_destroy(pool);
close(fd);
buffer->shm_size = size;
buffer->shm_data = data;
buffer->is_new = false;
buffer->is_busy = false;
return true;
}
static void destroy_shm_buffer(struct buffer *buffer)
{
if (buffer->wlbuf) {
wl_buffer_destroy(buffer->wlbuf);
buffer->wlbuf = NULL;
}
if (buffer->shm_data) {
munmap(buffer->shm_data, buffer->shm_size);
buffer->shm_data = NULL;
buffer->shm_size = 0;
}
}
static bool reinit_shm_buffers(struct priv *p, int width, int height)
{
bool ret = true;
enum wl_shm_format fmt = p->pref_format->wl_fmt;
for (int i = 0; ret && i < MAX_BUFFERS; ++i) {
destroy_shm_buffer(&p->buffers[i]);
ret = create_shm_buffer(p, &p->buffers[i], width, height, fmt);
}
return ret;
}
static bool redraw_frame(struct priv *p)
{
if (!p->original_image)
return false;
draw_image(p->vo, p->original_image);
return true;
}
static mp_image_t *get_screenshot(struct priv *p)
{
if (!p->original_image)
return NULL;
return mp_image_new_ref(p->original_image);
}
static bool resize(struct priv *p)
{
struct vo_wayland_state *wl = p->wl;
// if the newly resized buffer isn't attached, then don't resize again,
// because the front buffer might be empty and the temporary buffer might
// still be valid
if (p->resize_attach)
return false;
int32_t x = wl->window.sh_x;
int32_t y = wl->window.sh_y;
wl->vo->dwidth = wl->window.sh_width;
wl->vo->dheight = wl->window.sh_height;
vo_get_src_dst_rects(p->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;
MP_DBG(wl, "resizing %dx%d -> %dx%d\n", wl->window.width,
wl->window.height,
p->dst_w,
p->dst_h);
if (x != 0)
x = wl->window.width - p->dst_w;
if (y != 0)
y = wl->window.height - p->dst_h;
mp_sws_set_from_cmdline(p->sws);
p->sws->src = p->in_format;
p->sws->dst = (struct mp_image_params) {
.imgfmt = p->pref_format->mp_fmt,
.w = p->dst_w,
.h = p->dst_h,
.d_w = p->dst_w,
.d_h = p->dst_h,
};
mp_image_params_guess_csp(&p->sws->dst);
if (mp_sws_reinit(p->sws) < 0)
return false;
// copy pointers
p->tmp_buffer = *p->front_buffer;
p->front_buffer->shm_data = NULL;
p->front_buffer->wlbuf = NULL;
if (!reinit_shm_buffers(p, p->dst_w, p->dst_h)) {
MP_ERR(wl, "failed to resize buffers\n");
return false;
}
wl->window.width = p->dst_w;
wl->window.height = p->dst_h;
// if no alpha enabled format is used then create an opaque region to allow
// the compositor to optimize the drawing of the window
if (!p->enable_alpha) {
struct wl_region *opaque =
wl_compositor_create_region(wl->display.compositor);
wl_region_add(opaque, 0, 0, p->dst_w, p->dst_h);
wl_surface_set_opaque_region(wl->window.surface, opaque);
wl_region_destroy(opaque);
}
p->x = x;
p->y = y;
p->resize_attach = true;
p->wl->window.events = 0;
p->vo->want_redraw = true;
return true;
}
/* wayland listeners */
static void buffer_handle_release(void *data, struct wl_buffer *buffer)
{
struct buffer *buf = data;
buf->is_busy = false;
}
static const struct wl_buffer_listener buffer_listener = {
buffer_handle_release
};
static void frame_handle_redraw(void *data,
struct wl_callback *callback,
uint32_t time)
{
struct priv *p = data;
struct vo_wayland_state *wl = p->wl;
struct buffer *buf = buffer_get_front(p);
if (p->resize_attach) {
wl_surface_attach(wl->window.surface, buf->wlbuf, p->x, p->y);
wl_surface_damage(wl->window.surface, 0, 0, p->dst_w, p->dst_h);
wl_surface_commit(wl->window.surface);
if (callback)
wl_callback_destroy(callback);
p->redraw_callback = NULL;
buffer_finalise_front(p);
p->resize_attach = false;
destroy_shm_buffer(&p->tmp_buffer);
// I have to destroy the callback and return early to avoid black flickers
// I don't exactly know why this, but I guess the back buffer is still
// empty. The callback loop will be restored on the next flip_page call
return;
}
wl_surface_attach(wl->window.surface, buf->wlbuf, 0, 0);
wl_surface_damage(wl->window.surface, 0, 0, p->dst_w, p->dst_h);
if (callback)
wl_callback_destroy(callback);
p->redraw_callback = wl_surface_frame(wl->window.surface);
wl_callback_add_listener(p->redraw_callback, &frame_listener, p);
wl_surface_commit(wl->window.surface);
buffer_finalise_front(p);
}
static const struct wl_callback_listener frame_listener = {
frame_handle_redraw
};
static void shm_handle_format(void *data,
struct wl_shm *wl_shm,
uint32_t format)
{
struct priv *p = data;
for (int i = 0; i < MAX_FORMAT_ENTRIES; ++i) {
if (fmttable[i].wl_fmt == format) {
MP_INFO(p->wl, "format %s supported by hw\n",
mp_imgfmt_to_name(fmttable[i].mp_fmt));
struct supported_format *sf = talloc(p, struct supported_format);
sf->fmt = &fmttable[i];
sf->is_alpha = is_alpha_format(sf->fmt);
wl_list_insert(&p->format_list, &sf->link);
}
}
}
static const struct wl_shm_listener shm_listener = {
shm_handle_format
};
/* mpv interface */
static void draw_image(struct vo *vo, mp_image_t *mpi)
{
struct priv *p = vo->priv;
struct buffer *buf = buffer_get_back(p);
if (!buf) {
MP_WARN(p->wl, "can't draw, back buffer is busy\n");
return;
}
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 img = buffer_get_mp_image(p, buf);
mp_sws_scale(p->sws, &img, &src);
mp_image_setrefp(&p->original_image, mpi);
buffer_finalise_back(p);
}
static void draw_osd(struct vo *vo, struct osd_state *osd)
{
struct priv *p = vo->priv;
struct mp_image img = buffer_get_mp_image(p, p->back_buffer);
osd_draw_on_image(osd, p->osd, osd->vo_pts, 0, &img);
}
static void flip_page(struct vo *vo)
{
struct priv *p = vo->priv;
buffer_swap(p);
if (!p->redraw_callback) {
MP_INFO(p->wl, "restart frame callback\n");
frame_handle_redraw(p, NULL, 0);
}
}
static int query_format(struct vo *vo, uint32_t format)
{
struct priv *p = vo->priv;
struct supported_format *sf;
wl_list_for_each_reverse(sf, &p->format_list, link) {
if (sf->fmt->mp_fmt == format)
return VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_CSP_SUPPORTED;
}
if (mp_sws_supported_format(format))
return VFCAP_CSP_SUPPORTED;
return 0;
}
static int reconfig(struct vo *vo, struct mp_image_params *fmt, int flags)
{
struct priv *p = vo->priv;
mp_image_unrefp(&p->original_image);
p->width = vo->dwidth;
p->height = vo->dheight;
p->in_format = *fmt;
struct supported_format *sf;
// find the same format first
wl_list_for_each(sf, &p->format_list, link) {
if (sf->fmt->mp_fmt == fmt->imgfmt && (p->enable_alpha == sf->is_alpha)) {
p->pref_format = sf->fmt;
break;
}
}
// if the format is not supported choose one of the fancy formats next
// the default formats are always last
if (!p->pref_format) {
wl_list_for_each(sf, &p->format_list, link) {
if (p->enable_alpha == sf->is_alpha) {
p->pref_format = sf->fmt;
break;
}
}
}
// if use default is enable overwrite the auto selected one
if (p->use_default) {
if (p->enable_alpha)
p->pref_format = &fmttable[DEFAULT_ALPHA_FORMAT_ENTRY];
else
p->pref_format = &fmttable[DEFAULT_FORMAT_ENTRY];
}
p->bytes_per_pixel = mp_imgfmt_get_desc(p->pref_format->mp_fmt).bytes[0];
MP_VERBOSE(p->wl, "bytes per pixel: %d\n", p->bytes_per_pixel);
if (!reinit_shm_buffers(p, p->width, p->height)) {
MP_ERR(p->wl, "failed to initialise buffers\n");
return -1;
}
vo_wayland_config(vo, vo->dwidth, vo->dheight, flags);
return 0;
}
static void uninit(struct vo *vo)
{
struct priv *p = vo->priv;
for (int i = 0; i < MAX_BUFFERS; ++i)
destroy_shm_buffer(&p->buffers[i]);
talloc_free(p->original_image);
vo_wayland_uninit(vo);
}
static int preinit(struct vo *vo)
{
struct priv *p = vo->priv;
if (!vo_wayland_init(vo)) {
MP_ERR(p->wl, "could not initalise backend\n");
return -1;
}
p->vo = vo;
p->wl = vo->wayland;
p->sws = mp_sws_alloc(vo);
p->front_buffer = &p->buffers[1];
p->back_buffer = &p->buffers[0];
wl_list_init(&p->format_list);
wl_shm_add_listener(p->wl->display.shm, &shm_listener, p);
wl_display_dispatch(p->wl->display.display);
return 0;
}
static int control(struct vo *vo, uint32_t request, void *data)
{
struct priv *p = vo->priv;
switch (request) {
case VOCTRL_GET_PANSCAN:
return VO_TRUE;
case VOCTRL_SET_PANSCAN:
resize(p);
return VO_TRUE;
case VOCTRL_REDRAW_FRAME:
return redraw_frame(p);
case VOCTRL_WINDOW_TO_OSD_COORDS:
{
// OSD is rendered into the scaled image
float *c = data;
struct mp_rect *dst = &p->dst;
c[0] = av_clipf(c[0], dst->x0, dst->x1) - dst->x0;
c[1] = av_clipf(c[1], dst->y0, dst->y1) - dst->y0;
return VO_TRUE;
}
case VOCTRL_SCREENSHOT:
{
struct voctrl_screenshot_args *args = data;
args->out_image = get_screenshot(p);
return true;
}
}
int events = 0;
int r = vo_wayland_control(vo, &events, request, data);
// NOTE: VO_EVENT_EXPOSE is never returned by the wayland backend
if (events & VO_EVENT_RESIZE)
resize(p);
return r;
}
#define OPT_BASE_STRUCT struct priv
const struct vo_driver video_out_wayland = {
.info = &(const vo_info_t) {
"Wayland SHM video output",
"wayland",
"Alexander Preisinger <alexander.preisinger@gmail.com>",
""
},
.priv_size = sizeof(struct priv),
.preinit = preinit,
.query_format = query_format,
.reconfig = reconfig,
.control = control,
.draw_image = draw_image,
.draw_osd = draw_osd,
.flip_page = flip_page,
.uninit = uninit,
.options = (const struct m_option[]) {
OPT_FLAG("alpha", enable_alpha, 0),
OPT_FLAG("default-format", use_default, 0),
{0}
},
};
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