aboutsummaryrefslogtreecommitdiff
path: root/plugins/rtp/src/device.vala
blob: 3c650ad64ea59c8664d3109b41ecb73db52a4259 (plain) (blame)
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
public class Dino.Plugins.Rtp.Device : MediaDevice, Object {
    public Plugin plugin { get; private set; }
    public Gst.Device device { get; private set; }

    private string device_name;
    public string id { get {
        return device_name;
    }}
    private string device_display_name;
    public string display_name { get {
        return device_display_name;
    }}
    public string detail_name { get {
        return device.properties.get_string("alsa.card_name") ?? device.properties.get_string("alsa.id") ?? id;
    }}
    public Gst.Pipeline pipe { get {
        return plugin.pipe;
    }}
    public string? media { get {
        if (device.device_class.has_prefix("Audio/")) {
            return "audio";
        } else if (device.device_class.has_prefix("Video/")) {
            return "video";
        } else {
            return null;
        }
    }}
    public bool is_source { get {
        return device.device_class.has_suffix("/Source");
    }}
    public bool is_sink { get {
        return device.device_class.has_suffix("/Sink");
    }}

    private Gst.Element element;
    private Gst.Element tee;
    private Gst.Element dsp;
    private Gst.Element mixer;
    private Gst.Element filter;
    private Gst.Element rate;
    private int links = 0;

    public Device(Plugin plugin, Gst.Device device) {
        this.plugin = plugin;
        update(device);
    }

    public bool matches(Gst.Device device) {
        if (this.device.name == device.name) return true;
        return false;
    }

    public void update(Gst.Device device) {
        this.device = device;
        this.device_name = device.name;
        this.device_display_name = device.display_name;
    }

    public Gst.Element? link_sink() {
        if (element == null) create();
        links++;
        if (mixer != null) return mixer;
        if (is_sink && media == "audio") return filter;
        return element;
    }

    public Gst.Element? link_source() {
        if (element == null) create();
        links++;
        if (tee != null) return tee;
        return element;
    }

    public void unlink() {
        if (links <= 0) {
            critical("Link count below zero.");
            return;
        }
        links--;
        if (links == 0) {
            destroy();
        }
    }

    private Gst.Caps get_best_caps() {
        if (media == "audio") {
            return Gst.Caps.from_string("audio/x-raw,rate=48000,channels=1");
        } else if (media == "video" && device.caps.get_size() > 0) {
            int best_index = 0;
            int best_fps = 0;
            int best_width = 0;
            int best_height = 0;
            for (int i = 0; i < device.caps.get_size(); i++) {
                unowned Gst.Structure? that = device.caps.get_structure(i);
                if (!that.has_name("video/x-raw")) continue;
                int num = 0, den = 0, width = 0, height = 0;
                if (!that.has_field("framerate") || !that.get_fraction("framerate", out num, out den)) continue;
                if (!that.has_field("width") || !that.get_int("width", out width)) continue;
                if (!that.has_field("height") || !that.get_int("height", out height)) continue;
                int fps = num/den;
                if (best_fps < fps || best_fps == fps && best_width < width || best_fps == fps && best_width == width && best_height < height) {
                    best_fps = fps;
                    best_width = width;
                    best_height = height;
                    best_index = i;
                }
            }
            return caps_copy_nth(device.caps, best_index);
        } else if (device.caps.get_size() > 0) {
            return caps_copy_nth(device.caps, 0);
        } else {
            return new Gst.Caps.any();
        }
    }

    // Backport from gst_caps_copy_nth added in GStreamer 1.16
    private static Gst.Caps caps_copy_nth(Gst.Caps source, uint index) {
        Gst.Caps target = new Gst.Caps.empty();
        target.flags = source.flags;
        target.append_structure_full(source.get_structure(index).copy(), source.get_features(index).copy());
        return target;
    }

    private void create() {
        debug("Creating device %s", id);
        plugin.pause();
        element = device.create_element(id);
        pipe.add(element);
        if (is_source) {
            element.@set("do-timestamp", true);
            filter = Gst.ElementFactory.make("capsfilter", @"caps_filter_$id");
            filter.@set("caps", get_best_caps());
            pipe.add(filter);
            element.link(filter);
#if WITH_VOICE_PROCESSOR
            if (media == "audio" && plugin.echoprobe != null) {
                dsp = new VoiceProcessor(plugin.echoprobe as EchoProbe, element as Gst.Audio.StreamVolume);
                dsp.name = @"dsp_$id";
                pipe.add(dsp);
                filter.link(dsp);
            }
#endif
            tee = Gst.ElementFactory.make("tee", @"tee_$id");
            tee.@set("allow-not-linked", true);
            pipe.add(tee);
            (dsp ?? filter).link(tee);
        }
        if (is_sink) {
            element.@set("async", false);
            element.@set("sync", false);
        }
        if (is_sink && media == "audio") {
            filter = Gst.ElementFactory.make("capsfilter", @"caps_filter_$id");
            filter.@set("caps", get_best_caps());
            pipe.add(filter);
            if (plugin.echoprobe != null) {
                rate = Gst.ElementFactory.make("audiorate", @"rate_$id");
                rate.@set("tolerance", 100000000);
                pipe.add(rate);
                filter.link(rate);
                rate.link(plugin.echoprobe);
                plugin.echoprobe.link(element);
            } else {
                filter.link(element);
            }
        }
        plugin.unpause();
    }

    private void destroy() {
        if (mixer != null) {
            if (is_sink && media == "audio" && plugin.echoprobe != null) {
                plugin.echoprobe.unlink(mixer);
            }
            int linked_sink_pads = 0;
            mixer.foreach_sink_pad((_, pad) => {
                if (pad.is_linked()) linked_sink_pads++;
                return true;
            });
            if (linked_sink_pads > 0) {
                warning("%s-mixer still has %i sink pads while being destroyed", id, linked_sink_pads);
            }
            mixer.set_locked_state(true);
            mixer.set_state(Gst.State.NULL);
            mixer.unlink(element);
            pipe.remove(mixer);
            mixer = null;
        } else if (is_sink && media == "audio") {
            if (filter != null) {
                filter.set_locked_state(true);
                filter.set_state(Gst.State.NULL);
                filter.unlink(rate ?? ((Gst.Element)plugin.echoprobe) ?? element);
                pipe.remove(filter);
                filter = null;
            }
            if (rate != null) {
                rate.set_locked_state(true);
                rate.set_state(Gst.State.NULL);
                rate.unlink(plugin.echoprobe);
                pipe.remove(rate);
                rate = null;
            }
            if (plugin.echoprobe != null) {
                plugin.echoprobe.unlink(element);
            }
        }
        element.set_locked_state(true);
        element.set_state(Gst.State.NULL);
        if (filter != null) element.unlink(filter);
        else if (is_source) element.unlink(tee);
        pipe.remove(element);
        element = null;
        if (filter != null) {
            filter.set_locked_state(true);
            filter.set_state(Gst.State.NULL);
            filter.unlink(dsp ?? tee);
            pipe.remove(filter);
            filter = null;
        }
        if (dsp != null) {
            dsp.set_locked_state(true);
            dsp.set_state(Gst.State.NULL);
            dsp.unlink(tee);
            pipe.remove(dsp);
            dsp = null;
        }
        if (tee != null) {
            int linked_src_pads = 0;
            tee.foreach_src_pad((_, pad) => {
                if (pad.is_linked()) linked_src_pads++;
                return true;
            });
            if (linked_src_pads != 0) {
                warning("%s-tee still has %d src pads while being destroyed", id, linked_src_pads);
            }
            tee.set_locked_state(true);
            tee.set_state(Gst.State.NULL);
            pipe.remove(tee);
            tee = null;
        }
        debug("Destroyed device %s", id);
    }
}