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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 Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdbool.h>
#include <assert.h>
#include <libavutil/common.h>
#include "config.h"
#include "vo.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"
#include "sub/osd.h"
#include "sub/img_convert.h"
#include "common/msg.h"
#include "input/input.h"
#include "osdep/endian.h"
#include "osdep/timer.h"
#include "wayland_common.h"
#include "video/out/wayland/buffer.h"
static void draw_image(struct vo *vo, mp_image_t *mpi);
static void draw_osd(struct vo *vo);
static const struct wl_buffer_listener buffer_listener;
// TODO: pay attention to the reported subpixel order
static const format_t format_table[] = {
{WL_SHM_FORMAT_ARGB8888, IMGFMT_BGRA}, // 8b 8g 8r 8a
{WL_SHM_FORMAT_XRGB8888, IMGFMT_BGR0},
#if BYTE_ORDER == LITTLE_ENDIAN
{WL_SHM_FORMAT_RGB565, IMGFMT_RGB565}, // 5b 6g 5r
#endif
{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},
};
#define MAX_FORMAT_ENTRIES (sizeof(format_table) / sizeof(format_table[0]))
#define DEFAULT_FORMAT_ENTRY 1
#define DEFAULT_ALPHA_FORMAT_ENTRY 0
struct priv;
// We only use double buffering but the creation and usage is still open to
// triple buffering. Triple buffering is now removed, because double buffering
// is now pixel-perfect.
struct buffer_pool {
shm_buffer_t **buffers;
shm_buffer_t *front_buffer; // just pointers to any of the buffers
shm_buffer_t *back_buffer;
uint32_t buffer_no;
};
struct supported_format {
format_t format;
bool is_alpha;
struct wl_list link;
};
struct priv {
struct vo *vo;
struct vo_wayland_state *wl;
struct wl_list format_list;
const format_t *video_format; // pointer to element in supported_format list
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 buffer_pool video_bufpool;
struct mp_image *original_image;
int width; // width of the original image
int height;
int x, y; // coords for resizing
struct wl_surface *osd_surfaces[MAX_OSD_PARTS];
struct wl_subsurface *osd_subsurfaces[MAX_OSD_PARTS];
shm_buffer_t *osd_buffers[MAX_OSD_PARTS];
// this id tells us if the subtitle part has changed or not
int change_id[MAX_OSD_PARTS];
// options
int enable_alpha;
int use_rgb565;
};
static bool is_alpha_format(const format_t *fmt)
{
return !!(mp_imgfmt_get_desc(fmt->mp_format).flags & MP_IMGFLAG_ALPHA);
}
static const format_t* is_wayland_format_supported(struct priv *p,
enum wl_shm_format fmt)
{
struct supported_format *sf;
// find the matching format first
wl_list_for_each(sf, &p->format_list, link) {
if (sf->format.wl_format == fmt) {
return &sf->format;
}
}
return NULL;
}
// additional buffer functions
static void buffer_finalise_front(shm_buffer_t *buf)
{
SHM_BUFFER_SET_BUSY(buf);
SHM_BUFFER_CLEAR_DIRTY(buf);
}
static void buffer_finalise_back(shm_buffer_t *buf)
{
SHM_BUFFER_SET_DIRTY(buf);
}
static struct mp_image buffer_get_mp_image(struct priv *p,
shm_buffer_t *buf)
{
struct mp_image img = {0};
mp_image_set_params(&img, &p->sws->dst);
img.w = buf->stride / buf->bytes;
img.h = buf->height;
img.planes[0] = buf->data;
img.stride[0] = buf->stride;
return img;
}
// buffer pool functions
static void buffer_pool_reinit(struct priv *p,
struct buffer_pool *pool,
uint32_t buffer_no,
uint32_t width, uint32_t height,
format_t fmt,
struct wl_shm *shm)
{
if (!pool->buffers)
pool->buffers = calloc(buffer_no, sizeof(shm_buffer_t*));
pool->buffer_no = buffer_no;
for (uint32_t i = 0; i < buffer_no; ++i) {
if (pool->buffers[i] == NULL)
pool->buffers[i] = shm_buffer_create(width, height, fmt,
shm, &buffer_listener);
else
shm_buffer_resize(pool->buffers[i], width, height);
}
pool->back_buffer = pool->buffers[0];
pool->front_buffer = pool->buffers[1];
}
static bool buffer_pool_resize(struct buffer_pool *pool,
int width,
int height)
{
bool ret = true;
for (uint32_t i = 0; ret && i < pool->buffer_no; ++i)
shm_buffer_resize(pool->buffers[i], width, height);
return ret;
}
static void buffer_pool_destroy(struct buffer_pool *pool)
{
for (uint32_t i = 0; i < pool->buffer_no; ++i)
shm_buffer_destroy(pool->buffers[i]);
free(pool->buffers);
pool->front_buffer = NULL;
pool->back_buffer = NULL;
pool->buffers = NULL;
}
static void buffer_pool_swap(struct buffer_pool *pool)
{
if (SHM_BUFFER_IS_DIRTY(pool->back_buffer)) {
shm_buffer_t *tmp = pool->back_buffer;
pool->back_buffer = pool->front_buffer;
pool->front_buffer = tmp;
}
}
// returns NULL if the back buffer is busy
static shm_buffer_t * buffer_pool_get_back(struct buffer_pool *pool)
{
if (!pool->back_buffer || SHM_BUFFER_IS_BUSY(pool->back_buffer))
return NULL;
return pool->back_buffer;
}
static shm_buffer_t * buffer_pool_get_front(struct buffer_pool *pool)
{
return pool->front_buffer;
}
static bool redraw_frame(struct priv *p)
{
draw_image(p->vo, NULL);
return true;
}
static bool resize(struct priv *p)
{
struct vo_wayland_state *wl = p->wl;
if (!p->video_bufpool.back_buffer || SHM_BUFFER_IS_BUSY(p->video_bufpool.back_buffer))
return false; // skip resizing if we can't guarantee pixel perfectness!
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_input_set_mouse_transform(p->vo->input_ctx, &p->dst, NULL);
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->vo->opts->sws_opts);
p->sws->src = p->in_format;
p->sws->dst = (struct mp_image_params) {
.imgfmt = p->video_format->mp_format,
.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;
if (!buffer_pool_resize(&p->video_bufpool, p->dst_w, p->dst_h)) {
MP_ERR(wl, "failed to resize video 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.video_surface, opaque);
wl_region_destroy(opaque);
}
p->x = x;
p->y = y;
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)
{
shm_buffer_t *buf = data;
if (SHM_BUFFER_IS_ONESHOT(buf)) {
shm_buffer_destroy(buf);
return;
}
SHM_BUFFER_CLEAR_BUSY(buf);
// does nothing and returns 0 if no pending resize flag was set
shm_buffer_pending_resize(buf);
}
static const struct wl_buffer_listener buffer_listener = {
buffer_handle_release
};
static void shm_handle_format(void *data,
struct wl_shm *wl_shm,
uint32_t format)
{
struct priv *p = data;
for (uint32_t i = 0; i < MAX_FORMAT_ENTRIES; ++i) {
if (format_table[i].wl_format == format) {
MP_INFO(p->wl, "format %s supported by hw\n",
mp_imgfmt_to_name(format_table[i].mp_format));
struct supported_format *sf = talloc(p, struct supported_format);
sf->format = format_table[i];
sf->is_alpha = is_alpha_format(&sf->format);
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;
if (mpi) {
talloc_free(p->original_image);
p->original_image = mpi;
}
if (!vo_wayland_wait_frame(vo))
MP_DBG(p->wl, "discarding frame callback\n");
shm_buffer_t *buf = buffer_pool_get_back(&p->video_bufpool);
if (!buf) {
MP_VERBOSE(p->wl, "can't draw, back buffer is busy\n");
return;
}
struct mp_image img = buffer_get_mp_image(p, buf);
if (p->original_image) {
struct mp_image src = *p->original_image;
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);
}
buffer_finalise_back(buf);
draw_osd(vo);
}
static void draw_osd_cb(void *ctx, struct sub_bitmaps *imgs)
{
struct priv *p = ctx;
int id = imgs->render_index;
struct wl_surface *s = p->osd_surfaces[id];
if (imgs->change_id != p->change_id[id]) {
p->change_id[id] = imgs->change_id;
struct mp_rect bb;
if (!mp_sub_bitmaps_bb(imgs, &bb))
return;
int width = mp_rect_w(bb);
int height = mp_rect_h(bb);
if (!p->osd_buffers[id]) {
p->osd_buffers[id] = shm_buffer_create(width,
height,
format_table[DEFAULT_ALPHA_FORMAT_ENTRY],
p->wl->display.shm,
&buffer_listener);
}
else if (SHM_BUFFER_IS_BUSY(p->osd_buffers[id])) {
// freed on release in buffer_listener
// guarantees pixel perfect resizing of subtitles and osd
SHM_BUFFER_SET_ONESHOT(p->osd_buffers[id]);
p->osd_buffers[id] = shm_buffer_create(width,
height,
format_table[DEFAULT_ALPHA_FORMAT_ENTRY],
p->wl->display.shm,
&buffer_listener);
}
else {
shm_buffer_resize(p->osd_buffers[id], width, height);
}
shm_buffer_t *buf = p->osd_buffers[id];
SHM_BUFFER_SET_BUSY(buf);
struct mp_image wlimg = buffer_get_mp_image(p, buf);
for (int n = 0; n < imgs->num_parts; n++) {
struct sub_bitmap *sub = &imgs->parts[n];
memcpy_pic(wlimg.planes[0], sub->bitmap, sub->w * 4, sub->h,
wlimg.stride[0], sub->stride);
}
wl_subsurface_set_position(p->osd_subsurfaces[id], 0, 0);
wl_surface_attach(s, buf->buffer, bb.x0, bb.y0);
wl_surface_damage(s, 0, 0, width, height);
wl_surface_commit(s);
}
else {
// p->osd_buffer, guaranteed to exist here
assert(p->osd_buffers[id]);
wl_surface_attach(s, p->osd_buffers[id]->buffer, 0, 0);
wl_surface_commit(s);
}
}
static const bool osd_formats[SUBBITMAP_COUNT] = {
[SUBBITMAP_RGBA] = true,
};
static void draw_osd(struct vo *vo)
{
struct priv *p = vo->priv;
// detach all buffers and attach all needed buffers in osd_draw
// only the most recent attach & commit is applied once the parent surface
// is committed
for (int i = 0; i < MAX_OSD_PARTS; ++i) {
struct wl_surface *s = p->osd_surfaces[i];
wl_surface_attach(s, NULL, 0, 0);
wl_surface_damage(s, 0, 0, p->dst_w, p->dst_h);
wl_surface_commit(s);
}
double pts = p->original_image ? p->original_image->pts : 0;
osd_draw(vo->osd, p->osd, pts, 0, osd_formats, draw_osd_cb, p);
}
static void redraw(void *data, uint32_t time)
{
struct priv *p = data;
shm_buffer_t *buf = buffer_pool_get_front(&p->video_bufpool);
wl_surface_attach(p->wl->window.video_surface, buf->buffer, p->x, p->y);
wl_surface_damage(p->wl->window.video_surface, 0, 0, p->dst_w, p->dst_h);
buffer_finalise_front(buf);
p->x = 0;
p->y = 0;
}
static void flip_page(struct vo *vo)
{
struct priv *p = vo->priv;
buffer_pool_swap(&p->video_bufpool);
if (!p->wl->frame.callback)
vo_wayland_request_frame(vo, p, redraw);
if (!vo_wayland_wait_frame(vo))
MP_DBG(p->wl, "discarding frame callback\n");
}
static int query_format(struct vo *vo, int format)
{
struct priv *p = vo->priv;
struct supported_format *sf;
wl_list_for_each_reverse(sf, &p->format_list, link) {
if (sf->format.mp_format == format)
return 1;
}
if (mp_sws_supported_format(format))
return 1;
return 0;
}
static int reconfig(struct vo *vo, struct mp_image_params *fmt)
{
struct priv *p = vo->priv;
mp_image_unrefp(&p->original_image);
p->width = fmt->w;
p->height = fmt->h;
p->in_format = *fmt;
struct supported_format *sf;
// find the matching format first
wl_list_for_each(sf, &p->format_list, link) {
if (sf->format.mp_format == fmt->imgfmt &&
(p->enable_alpha == sf->is_alpha))
{
p->video_format = &sf->format;
break;
}
}
if (!p->video_format) {
// if use default is enable overwrite the auto selected one
if (p->enable_alpha)
p->video_format = &format_table[DEFAULT_ALPHA_FORMAT_ENTRY];
else
p->video_format = &format_table[DEFAULT_FORMAT_ENTRY];
}
// overrides alpha
// use rgb565 if performance is your main concern
if (p->use_rgb565) {
MP_INFO(p->wl, "using rgb565\n");
const format_t *entry =
is_wayland_format_supported(p, WL_SHM_FORMAT_RGB565);
if (entry)
p->video_format = entry;
}
buffer_pool_reinit(p, &p->video_bufpool, 2, p->width, p->height,
*p->video_format, p->wl->display.shm);
vo_wayland_config(vo);
resize(p);
return 0;
}
static void uninit(struct vo *vo)
{
struct priv *p = vo->priv;
buffer_pool_destroy(&p->video_bufpool);
talloc_free(p->original_image);
for (int i = 0; i < MAX_OSD_PARTS; ++i) {
shm_buffer_destroy(p->osd_buffers[i]);
wl_subsurface_destroy(p->osd_subsurfaces[i]);
wl_surface_destroy(p->osd_surfaces[i]);
}
vo_wayland_uninit(vo);
}
static int preinit(struct vo *vo)
{
struct priv *p = vo->priv;
struct vo_wayland_state *wl = NULL;
if (!vo_wayland_init(vo))
return -1;
wl = vo->wayland;
p->vo = vo;
p->wl = wl;
p->sws = mp_sws_alloc(vo);
wl_list_init(&p->format_list);
wl_shm_add_listener(wl->display.shm, &shm_listener, p);
wl_display_dispatch(wl->display.display);
// Commits on surfaces bound to a subsurface are cached until the parent
// surface is committed, in this case the video surface.
// Which means we can call commit anywhere.
struct wl_region *input =
wl_compositor_create_region(wl->display.compositor);
for (int i = 0; i < MAX_OSD_PARTS; ++i) {
p->osd_surfaces[i] =
wl_compositor_create_surface(wl->display.compositor);
wl_surface_attach(p->osd_surfaces[i], NULL, 0, 0);
wl_surface_set_input_region(p->osd_surfaces[i], input);
p->osd_subsurfaces[i] =
wl_subcompositor_get_subsurface(wl->display.subcomp,
p->osd_surfaces[i],
wl->window.video_surface); // parent
wl_surface_commit(p->osd_surfaces[i]);
wl_subsurface_set_sync(p->osd_subsurfaces[i]);
}
wl_region_destroy(input);
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);
}
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);
vo_event(vo, events);
return r;
}
#define OPT_BASE_STRUCT struct priv
const struct vo_driver video_out_wayland = {
.description = "Wayland SHM video output",
.name = "wayland",
.priv_size = sizeof(struct priv),
.preinit = preinit,
.query_format = query_format,
.reconfig = reconfig,
.control = control,
.draw_image = draw_image,
.flip_page = flip_page,
.uninit = uninit,
.options = (const struct m_option[]) {
OPT_FLAG("alpha", enable_alpha, 0),
OPT_FLAG("rgb565", use_rgb565, 0),
{0}
},
};
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