summaryrefslogtreecommitdiffstats
path: root/video/out/vo_wlshm.c
blob: f6c37714da006af4b8e2f01a2fe35836e8640411 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
/*
 * This file is part of mpv video player.
 *
 * 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 <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <time.h>
#include <unistd.h>

#include <libswscale/swscale.h>

#include "sub/osd.h"
#include "video/fmt-conversion.h"
#include "video/mp_image.h"
#include "video/sws_utils.h"
#include "vo.h"
#include "wayland_common.h"

struct buffer {
    struct vo *vo;
    size_t size;
    struct wl_shm_pool *pool;
    struct wl_buffer *buffer;
    struct mp_image mpi;
    struct buffer *next;
};

struct priv {
    struct mp_sws_context *sws;
    struct buffer *free_buffers;
    struct mp_rect src;
    struct mp_rect dst;
    struct mp_osd_res osd;
};

static void buffer_handle_release(void *data, struct wl_buffer *wl_buffer)
{
    struct buffer *buf = data;
    struct vo *vo = buf->vo;
    struct priv *p = vo->priv;

    if (buf->mpi.w == vo->dwidth && buf->mpi.h == vo->dheight) {
        buf->next = p->free_buffers;
        p->free_buffers = buf;
    } else {
        talloc_free(buf);
    }
}

static const struct wl_buffer_listener buffer_listener = {
    buffer_handle_release,
};

static void buffer_destroy(void *p)
{
    struct buffer *buf = p;
    wl_buffer_destroy(buf->buffer);
    wl_shm_pool_destroy(buf->pool);
    munmap(buf->mpi.planes[0], buf->size);
}

static const struct wl_callback_listener frame_listener;

static void frame_callback(void *data, struct wl_callback *callback, uint32_t time)
{
    struct vo_wayland_state *wl = data;

    if (callback)
        wl_callback_destroy(callback);

    wl->frame_callback = wl_surface_frame(wl->surface);
    wl_callback_add_listener(wl->frame_callback, &frame_listener, wl);

    wl->frame_wait = false;
}

static const struct wl_callback_listener frame_listener = {
    frame_callback,
};

static int allocate_memfd(size_t size)
{
    int fd = memfd_create("mpv", MFD_CLOEXEC | MFD_ALLOW_SEALING);
    if (fd < 0)
        return -1;

    fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_SEAL);

    if (posix_fallocate(fd, 0, size) == 0)
        return fd;

    close(fd);
    return -1;
}

static struct buffer *buffer_create(struct vo *vo, int width, int height)
{
    struct priv *p = vo->priv;
    struct vo_wayland_state *wl = vo->wl;
    int fd;
    int stride;
    size_t size;
    uint8_t *data;
    struct buffer *buf;

    stride = MP_ALIGN_UP(width * 4, 16);
    size = height * stride;
    fd = allocate_memfd(size);
    if (fd < 0)
        goto error0;
    data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
    if (data == MAP_FAILED)
        goto error1;
    buf = talloc_zero(NULL, struct buffer);
    if (!buf)
        goto error2;
    buf->vo = vo;
    buf->size = size;
    mp_image_set_params(&buf->mpi, &p->sws->dst);
    mp_image_set_size(&buf->mpi, width, height);
    buf->mpi.planes[0] = data;
    buf->mpi.stride[0] = stride;
    buf->pool = wl_shm_create_pool(wl->shm, fd, size);
    if (!buf->pool)
        goto error3;
    buf->buffer = wl_shm_pool_create_buffer(buf->pool, 0, width, height,
                                            stride, WL_SHM_FORMAT_XRGB8888);
    if (!buf->buffer)
        goto error4;
    wl_buffer_add_listener(buf->buffer, &buffer_listener, buf);
    if (!wl->frame_callback) {
        wl->frame_callback = wl_surface_frame(wl->surface);
        wl_callback_add_listener(wl->frame_callback, &frame_listener, wl);
    }

    close(fd);
    talloc_set_destructor(buf, buffer_destroy);

    return buf;

error4:
    wl_shm_pool_destroy(buf->pool);
error3:
    talloc_free(buf);
error2:
    munmap(data, size);
error1:
    close(fd);
error0:
    return NULL;
}

static int preinit(struct vo *vo)
{
    struct priv *p = vo->priv;

    if (!vo_wayland_init(vo))
        return -1;
    p->sws = mp_sws_alloc(vo);
    p->sws->log = vo->log;
    mp_sws_enable_cmdline_opts(p->sws, vo->global);

    return 0;
}

static int query_format(struct vo *vo, int format)
{
    return sws_isSupportedInput(imgfmt2pixfmt(format));
}

static int reconfig(struct vo *vo, struct mp_image_params *params)
{
    struct priv *p = vo->priv;

    if (!vo_wayland_reconfig(vo))
        return -1;
    p->sws->src = *params;

    return 0;
}

static int resize(struct vo *vo)
{
    struct priv *p = vo->priv;
    struct vo_wayland_state *wl = vo->wl;
    const int32_t width = wl->scaling * mp_rect_w(wl->geometry);
    const int32_t height = wl->scaling * mp_rect_h(wl->geometry);
    struct buffer *buf;

    vo_wayland_set_opaque_region(wl, 0);
    vo->want_redraw = true;
    vo->dwidth = width;
    vo->dheight = height;
    vo_get_src_dst_rects(vo, &p->src, &p->dst, &p->osd);
    p->sws->dst = (struct mp_image_params) {
        .imgfmt = IMGFMT_BGR0,
        .w = width,
        .h = height,
        .p_w = 1,
        .p_h = 1,
    };
    mp_image_params_guess_csp(&p->sws->dst);
    while (p->free_buffers) {
        buf = p->free_buffers;
        p->free_buffers = buf->next;
        talloc_free(buf);
    }
    return mp_sws_reinit(p->sws);
}

static int control(struct vo *vo, uint32_t request, void *data)
{
    int events = 0;
    int ret = vo_wayland_control(vo, &events, request, data);

    if (events & VO_EVENT_RESIZE)
        ret = resize(vo);
    if (events & VO_EVENT_EXPOSE)
        vo->want_redraw = true;
    vo_event(vo, events);
    return ret;
}

static void draw_image(struct vo *vo, struct mp_image *src)
{
    struct priv *p = vo->priv;
    struct vo_wayland_state *wl = vo->wl;
    struct buffer *buf;

    if (wl->hidden)
        return;

    wl->frame_wait = true;

    buf = p->free_buffers;
    if (buf) {
        p->free_buffers = buf->next;
    } else {
        buf = buffer_create(vo, vo->dwidth, vo->dheight);
        if (!buf) {
            wl_surface_attach(wl->surface, NULL, 0, 0);
            return;
        }
    }
    if (src) {
        struct mp_image dst = buf->mpi;
        struct mp_rect src_rc;
        struct mp_rect dst_rc;
        src_rc.x0 = MP_ALIGN_DOWN(p->src.x0, MPMAX(src->fmt.align_x, 4));
        src_rc.y0 = MP_ALIGN_DOWN(p->src.y0, MPMAX(src->fmt.align_y, 4));
        src_rc.x1 = p->src.x1 - (p->src.x0 - src_rc.x0);
        src_rc.y1 = p->src.y1 - (p->src.y0 - src_rc.y0);
        dst_rc.x0 = MP_ALIGN_DOWN(p->dst.x0, MPMAX(dst.fmt.align_x, 4));
        dst_rc.y0 = MP_ALIGN_DOWN(p->dst.y0, MPMAX(dst.fmt.align_y, 4));
        dst_rc.x1 = p->dst.x1 - (p->dst.x0 - dst_rc.x0);
        dst_rc.y1 = p->dst.y1 - (p->dst.y0 - dst_rc.y0);
        mp_image_crop_rc(src, src_rc);
        mp_image_crop_rc(&dst, dst_rc);
        mp_sws_scale(p->sws, &dst, src);
        if (dst_rc.y0 > 0)
            mp_image_clear(&buf->mpi, 0, 0, buf->mpi.w, dst_rc.y0);
        if (buf->mpi.h > dst_rc.y1)
            mp_image_clear(&buf->mpi, 0, dst_rc.y1, buf->mpi.w, buf->mpi.h);
        if (dst_rc.x0 > 0)
            mp_image_clear(&buf->mpi, 0, dst_rc.y0, dst_rc.x0, dst_rc.y1);
        if (buf->mpi.w > dst_rc.x1)
            mp_image_clear(&buf->mpi, dst_rc.x1, dst_rc.y0, buf->mpi.w, dst_rc.y1);
        osd_draw_on_image(vo->osd, p->osd, src->pts, 0, &buf->mpi);
    } else {
        mp_image_clear(&buf->mpi, 0, 0, buf->mpi.w, buf->mpi.h);
        osd_draw_on_image(vo->osd, p->osd, 0, 0, &buf->mpi);
    }
    talloc_free(src);
    wl_surface_attach(wl->surface, buf->buffer, 0, 0);
}

static void flip_page(struct vo *vo)
{
    struct vo_wayland_state *wl = vo->wl;

    wl_surface_damage(wl->surface, 0, 0, mp_rect_w(wl->geometry),
                      mp_rect_h(wl->geometry));
    wl_surface_commit(wl->surface);

    if (!wl->opts->disable_vsync)
        vo_wayland_wait_frame(wl);
}

static void uninit(struct vo *vo)
{
    struct priv *p = vo->priv;
    struct buffer *buf;

    while (p->free_buffers) {
        buf = p->free_buffers;
        p->free_buffers = buf->next;
        talloc_free(buf);
    }
    vo_wayland_uninit(vo);
}

#define OPT_BASE_STRUCT struct priv
static const m_option_t options[] = {
    {0}
};

const struct vo_driver video_out_wlshm = {
    .description = "Wayland SHM video output (software scaling)",
    .name = "wlshm",
    .preinit = preinit,
    .query_format = query_format,
    .reconfig = reconfig,
    .control = control,
    .draw_image = draw_image,
    .flip_page = flip_page,
    .wakeup = vo_wayland_wakeup,
    .wait_events = vo_wayland_wait_events,
    .uninit = uninit,
    .priv_size = sizeof(struct priv),
    .options = options,
};