aboutsummaryrefslogtreecommitdiff
path: root/src/capture/xcomposite.c
blob: 31d0b7e5d367adde77af89f1b636848864d3f601 (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
336
337
338
339
340
341
342
343
344
345
346
347
348
#include "../../include/capture/xcomposite.h"
#include "../../include/window_texture.h"
#include "../../include/utils.h"
#include "../../include/cursor.h"
#include "../../include/color_conversion.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include <X11/Xlib.h>

#include <libavutil/frame.h>
#include <libavcodec/avcodec.h>

typedef struct {
    gsr_capture_xcomposite_params params;

    bool should_stop;
    bool stop_is_error;
    bool window_resized;
    bool follow_focused_initialized;
    bool init_new_window;

    Window window;
    vec2i window_size;
    vec2i texture_size;
    double window_resize_timer;
    
    WindowTexture window_texture;
    AVCodecContext *video_codec_context;

    Atom net_active_window_atom;

    gsr_cursor cursor;

    bool clear_background;
} gsr_capture_xcomposite;

static void gsr_capture_xcomposite_stop(gsr_capture_xcomposite *self) {
    window_texture_deinit(&self->window_texture);
    gsr_cursor_deinit(&self->cursor);
}

static int max_int(int a, int b) {
    return a > b ? a : b;
}

static Window get_focused_window(Display *display, Atom net_active_window_atom) {
    Atom type;
    int format = 0;
    unsigned long num_items = 0;
    unsigned long bytes_after = 0;
    unsigned char *properties = NULL;
    if(XGetWindowProperty(display, DefaultRootWindow(display), net_active_window_atom, 0, 1024, False, AnyPropertyType, &type, &format, &num_items, &bytes_after, &properties) == Success && properties) {
        Window focused_window = *(unsigned long*)properties;
        XFree(properties);
        return focused_window;
    }
    return None;
}

static int gsr_capture_xcomposite_start(gsr_capture *cap, AVCodecContext *video_codec_context, AVFrame *frame) {
    gsr_capture_xcomposite *self = cap->priv;

    if(self->params.follow_focused) {
        self->net_active_window_atom = XInternAtom(self->params.egl->x11.dpy, "_NET_ACTIVE_WINDOW", False);
        if(!self->net_active_window_atom) {
            fprintf(stderr, "gsr error: gsr_capture_xcomposite_start failed: failed to get _NET_ACTIVE_WINDOW atom\n");
            return -1;
        }
        self->window = get_focused_window(self->params.egl->x11.dpy, self->net_active_window_atom);
    } else {
        self->window = self->params.window;
    }

    /* TODO: Do these in tick, and allow error if follow_focused */

    XWindowAttributes attr;
    if(!XGetWindowAttributes(self->params.egl->x11.dpy, self->window, &attr) && !self->params.follow_focused) {
        fprintf(stderr, "gsr error: gsr_capture_xcomposite_start failed: invalid window id: %lu\n", self->window);
        return -1;
    }

    self->window_size.x = max_int(attr.width, 0);
    self->window_size.y = max_int(attr.height, 0);

    if(self->params.follow_focused)
        XSelectInput(self->params.egl->x11.dpy, DefaultRootWindow(self->params.egl->x11.dpy), PropertyChangeMask);

    // TODO: Get select and add these on top of it and then restore at the end. Also do the same in other xcomposite
    XSelectInput(self->params.egl->x11.dpy, self->window, StructureNotifyMask | ExposureMask);

    /* Disable vsync */
    self->params.egl->eglSwapInterval(self->params.egl->egl_display, 0);
    if(window_texture_init(&self->window_texture, self->params.egl->x11.dpy, self->window, self->params.egl) != 0 && !self->params.follow_focused) {
        fprintf(stderr, "gsr error: gsr_capture_xcomposite_start: failed to get window texture for window %ld\n", self->window);
        return -1;
    }

    if(gsr_cursor_init(&self->cursor, self->params.egl, self->params.egl->x11.dpy) != 0) {
        gsr_capture_xcomposite_stop(self);
        return -1;
    }

    self->texture_size.x = 0;
    self->texture_size.y = 0;

    self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture));
    self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x);
    self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y);
    self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);

    vec2i video_size = self->texture_size;

    if(self->params.region_size.x > 0 && self->params.region_size.y > 0)
        video_size = self->params.region_size;

    video_codec_context->width = FFALIGN(video_size.x, 2);
    video_codec_context->height = FFALIGN(video_size.y, 2);

    frame->width = video_codec_context->width;
    frame->height = video_codec_context->height;

    self->video_codec_context = video_codec_context;
    self->window_resize_timer = clock_get_monotonic_seconds();
    return 0;
}

static void gsr_capture_xcomposite_tick(gsr_capture *cap) {
    gsr_capture_xcomposite *self = cap->priv;

    if(self->params.follow_focused && !self->follow_focused_initialized) {
        self->init_new_window = true;
    }

    if(self->init_new_window) {
        self->init_new_window = false;
        Window focused_window = get_focused_window(self->params.egl->x11.dpy, self->net_active_window_atom);
        if(focused_window != self->window || !self->follow_focused_initialized) {
            self->follow_focused_initialized = true;
            XSelectInput(self->params.egl->x11.dpy, self->window, 0);
            self->window = focused_window;
            XSelectInput(self->params.egl->x11.dpy, self->window, StructureNotifyMask | ExposureMask);

            XWindowAttributes attr;
            attr.width = 0;
            attr.height = 0;
            if(!XGetWindowAttributes(self->params.egl->x11.dpy, self->window, &attr))
                fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick failed: invalid window id: %lu\n", self->window);

            self->window_size.x = max_int(attr.width, 0);
            self->window_size.y = max_int(attr.height, 0);

            window_texture_deinit(&self->window_texture);
            window_texture_init(&self->window_texture, self->params.egl->x11.dpy, self->window, self->params.egl); // TODO: Do not do the below window_texture_on_resize after this

            self->texture_size.x = 0;
            self->texture_size.y = 0;

            self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture));
            self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x);
            self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y);
            self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);

            self->window_resized = false;
            self->clear_background = true;
        }
    }

    const double window_resize_timeout = 1.0; // 1 second
    if(self->window_resized && clock_get_monotonic_seconds() - self->window_resize_timer >= window_resize_timeout) {
        self->window_resized = false;

        if(window_texture_on_resize(&self->window_texture) != 0) {
            fprintf(stderr, "gsr error: gsr_capture_xcomposite_tick: window_texture_on_resize failed\n");
            //self->should_stop = true;
            //self->stop_is_error = true;
            return;
        }

        self->texture_size.x = 0;
        self->texture_size.y = 0;

        self->params.egl->glBindTexture(GL_TEXTURE_2D, window_texture_get_opengl_texture_id(&self->window_texture));
        self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &self->texture_size.x);
        self->params.egl->glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &self->texture_size.y);
        self->params.egl->glBindTexture(GL_TEXTURE_2D, 0);

        self->clear_background = true;
    }
}

static void gsr_capture_xcomposite_on_event(gsr_capture *cap, gsr_egl *egl) {
    gsr_capture_xcomposite *self = cap->priv;
    XEvent *xev = gsr_egl_get_event_data(egl);
    switch(xev->type) {
        case DestroyNotify: {
            /* Window died (when not following focused window), so we stop recording */
            if(!self->params.follow_focused && xev->xdestroywindow.window == self->window) {
                self->should_stop = true;
                self->stop_is_error = false;
            }
            break;
        }
        case Expose: {
            /* Requires window texture recreate */
            if(xev->xexpose.count == 0 && xev->xexpose.window == self->window) {
                self->window_resize_timer = clock_get_monotonic_seconds();
                self->window_resized = true;
            }
            break;
        }
        case ConfigureNotify: {
            /* Window resized */
            if(xev->xconfigure.window == self->window && (xev->xconfigure.width != self->window_size.x || xev->xconfigure.height != self->window_size.y)) {
                self->window_size.x = max_int(xev->xconfigure.width, 0);
                self->window_size.y = max_int(xev->xconfigure.height, 0);
                self->window_resize_timer = clock_get_monotonic_seconds();
                self->window_resized = true;
            }
            break;
        }
        case PropertyNotify: {
            /* Focused window changed */
            if(self->params.follow_focused && xev->xproperty.atom == self->net_active_window_atom) {
                self->init_new_window = true;
            }
            break;
        }
    }

    gsr_cursor_on_event(&self->cursor, xev);
}

static bool gsr_capture_xcomposite_should_stop(gsr_capture *cap, bool *err) {
    gsr_capture_xcomposite *self = cap->priv;
    if(self->should_stop) {
        if(err)
            *err = self->stop_is_error;
        return true;
    }

    if(err)
        *err = false;
    return false;
}

static int gsr_capture_xcomposite_capture(gsr_capture *cap, AVFrame *frame, gsr_color_conversion *color_conversion) {
    gsr_capture_xcomposite *self = cap->priv;
    (void)frame;

    if(self->clear_background) {
        self->clear_background = false;
        gsr_color_conversion_clear(color_conversion);
    }

    const vec2i target_pos = { max_int(0, frame->width / 2 - self->texture_size.x / 2), max_int(0, frame->height / 2 - self->texture_size.y / 2) };

    /* Fast opengl free path */
    if(video_codec_context_is_vaapi(self->video_codec_context) && self->params.egl->gpu_info.vendor == GSR_GPU_VENDOR_AMD) {
        vaapi_copy_egl_image_to_video_surface(self->params.egl, self->window_texture.image, (vec2i){0, 0}, self->texture_size, target_pos, self->texture_size, self->video_codec_context, frame);
    } else {
        gsr_color_conversion_draw(color_conversion, window_texture_get_opengl_texture_id(&self->window_texture),
            target_pos, self->texture_size,
            (vec2i){0, 0}, self->texture_size,
            0.0f, false);
    }

    if(self->params.record_cursor && self->cursor.visible) {
        gsr_cursor_tick(&self->cursor, self->window);

        const vec2i cursor_pos = {
            target_pos.x + self->cursor.position.x - self->cursor.hotspot.x,
            target_pos.y + self->cursor.position.y - self->cursor.hotspot.y
        };

        self->params.egl->glEnable(GL_SCISSOR_TEST);
        self->params.egl->glScissor(target_pos.x, target_pos.y, self->texture_size.x, self->texture_size.y);

        gsr_color_conversion_draw(color_conversion, self->cursor.texture_id,
            cursor_pos, self->cursor.size,
            (vec2i){0, 0}, self->cursor.size,
            0.0f, false);

        self->params.egl->glDisable(GL_SCISSOR_TEST);
    }

    self->params.egl->glFlush();
    self->params.egl->glFinish();

    return 0;
}

static gsr_source_color gsr_capture_xcomposite_get_source_color(gsr_capture *cap) {
    (void)cap;
    return GSR_SOURCE_COLOR_RGB;
}

static uint64_t gsr_capture_xcomposite_get_window_id(gsr_capture *cap) {
    gsr_capture_xcomposite *self = cap->priv;
    return self->window;
}

static void gsr_capture_xcomposite_destroy(gsr_capture *cap, AVCodecContext *video_codec_context) {
    (void)video_codec_context;
    if(cap->priv) {
        gsr_capture_xcomposite_stop(cap->priv);
        free(cap->priv);
        cap->priv = NULL;
    }
    free(cap);
}

gsr_capture* gsr_capture_xcomposite_create(const gsr_capture_xcomposite_params *params) {
    if(!params) {
        fprintf(stderr, "gsr error: gsr_capture_xcomposite_create params is NULL\n");
        return NULL;
    }

    gsr_capture *cap = calloc(1, sizeof(gsr_capture));
    if(!cap)
        return NULL;

    gsr_capture_xcomposite *cap_xcomp = calloc(1, sizeof(gsr_capture_xcomposite));
    if(!cap_xcomp) {
        free(cap);
        return NULL;
    }

    cap_xcomp->params = *params;
    
    *cap = (gsr_capture) {
        .start = gsr_capture_xcomposite_start,
        .on_event = gsr_capture_xcomposite_on_event,
        .tick = gsr_capture_xcomposite_tick,
        .should_stop = gsr_capture_xcomposite_should_stop,
        .capture = gsr_capture_xcomposite_capture,
        .get_source_color = gsr_capture_xcomposite_get_source_color,
        .uses_external_image = NULL,
        .get_window_id = gsr_capture_xcomposite_get_window_id,
        .destroy = gsr_capture_xcomposite_destroy,
        .priv = cap_xcomp
    };

    return cap;
}