diff options
Diffstat (limited to 'plugins/rtp/src/device.vala')
| -rw-r--r-- | plugins/rtp/src/device.vala | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/plugins/rtp/src/device.vala b/plugins/rtp/src/device.vala new file mode 100644 index 00000000..796be203 --- /dev/null +++ b/plugins/rtp/src/device.vala @@ -0,0 +1,206 @@ +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 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 plugin.echoprobe; + 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 device.caps.copy_nth(best_index); + } else if (device.caps.get_size() > 0) { + return device.caps.copy_nth(0); + } else { + return new Gst.Caps.any(); + } + } + + private void create() { + debug("Creating device %s", id); + plugin.pause(); + element = device.create_element(id); + pipe.add(element); + if (is_source) { + filter = Gst.ElementFactory.make("capsfilter", @"$id-caps-filter"); + filter.@set("caps", get_best_caps()); + pipe.add(filter); + element.link(filter); + if (media == "audio") { + dsp = Gst.ElementFactory.make("webrtcdsp", @"$id-dsp"); + dsp.@set("probe", plugin.echoprobe.name); + pipe.add(dsp); + filter.link(dsp); + } + tee = Gst.ElementFactory.make("tee", @"$id-tee"); + tee.@set("allow-not-linked", true); + pipe.add(tee); + (dsp ?? filter).link(tee); + } + if (is_sink) { + element.@set("async", false); + element.@set("sync", false); + } + if (is_sink && media == "audio") { +// mixer = Gst.ElementFactory.make("audiomixer", @"$id-mixer"); +// pipe.add(mixer); +// mixer.link(plugin.echoprobe); + plugin.echoprobe.link(element); + } + plugin.unpause(); + } + + private void destroy() { + if (mixer != null) { + if (is_sink && media == "audio") { + 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") { + 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); + } +}
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