diff options
Diffstat (limited to 'plugins/rtp/src/stream.vala')
| -rw-r--r-- | plugins/rtp/src/stream.vala | 220 |
1 files changed, 199 insertions, 21 deletions
diff --git a/plugins/rtp/src/stream.vala b/plugins/rtp/src/stream.vala index 3a63f3fa..23634aa3 100644 --- a/plugins/rtp/src/stream.vala +++ b/plugins/rtp/src/stream.vala @@ -19,9 +19,12 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { private Gst.App.Src recv_rtp; private Gst.App.Src recv_rtcp; private Gst.Element encode; + private Gst.RTP.BasePayload encode_pay; private Gst.Element decode; + private Gst.RTP.BaseDepayload decode_depay; private Gst.Element input; private Gst.Element output; + private Gst.Element session; private Device _input_device; public Device input_device { get { return _input_device; } set { @@ -85,15 +88,15 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { } // Create app elements - send_rtp = Gst.ElementFactory.make("appsink", @"rtp-sink-$rtpid") as Gst.App.Sink; + send_rtp = Gst.ElementFactory.make("appsink", @"rtp_sink_$rtpid") as Gst.App.Sink; send_rtp.async = false; - send_rtp.caps = CodecUtil.get_caps(media, payload_type); + send_rtp.caps = CodecUtil.get_caps(media, payload_type, false); send_rtp.emit_signals = true; send_rtp.sync = false; send_rtp.new_sample.connect(on_new_sample); pipe.add(send_rtp); - send_rtcp = Gst.ElementFactory.make("appsink", @"rtcp-sink-$rtpid") as Gst.App.Sink; + send_rtcp = Gst.ElementFactory.make("appsink", @"rtcp_sink_$rtpid") as Gst.App.Sink; send_rtcp.async = false; send_rtcp.caps = new Gst.Caps.empty_simple("application/x-rtcp"); send_rtcp.emit_signals = true; @@ -101,14 +104,14 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { send_rtcp.new_sample.connect(on_new_sample); pipe.add(send_rtcp); - recv_rtp = Gst.ElementFactory.make("appsrc", @"rtp-src-$rtpid") as Gst.App.Src; - recv_rtp.caps = CodecUtil.get_caps(media, payload_type); + recv_rtp = Gst.ElementFactory.make("appsrc", @"rtp_src_$rtpid") as Gst.App.Src; + recv_rtp.caps = CodecUtil.get_caps(media, payload_type, true); recv_rtp.do_timestamp = true; recv_rtp.format = Gst.Format.TIME; recv_rtp.is_live = true; pipe.add(recv_rtp); - recv_rtcp = Gst.ElementFactory.make("appsrc", @"rtcp-src-$rtpid") as Gst.App.Src; + recv_rtcp = Gst.ElementFactory.make("appsrc", @"rtcp_src_$rtpid") as Gst.App.Src; recv_rtcp.caps = new Gst.Caps.empty_simple("application/x-rtcp"); recv_rtcp.do_timestamp = true; recv_rtcp.format = Gst.Format.TIME; @@ -122,7 +125,8 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { recv_rtcp.get_static_pad("src").link(recv_rtcp_sink_pad); // Connect input - encode = codec_util.get_encode_bin(media, payload_type, @"encode-$rtpid"); + encode = codec_util.get_encode_bin(media, payload_type, @"encode_$rtpid"); + encode_pay = (Gst.RTP.BasePayload)((Gst.Bin)encode).get_by_name(@"encode_$(rtpid)_rtp_pay"); pipe.add(encode); send_rtp_sink_pad = rtpbin.get_request_pad(@"send_rtp_sink_$rtpid"); encode.get_static_pad("src").link(send_rtp_sink_pad); @@ -131,7 +135,8 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { } // Connect output - decode = codec_util.get_decode_bin(media, payload_type, @"decode-$rtpid"); + decode = codec_util.get_decode_bin(media, payload_type, @"decode_$rtpid"); + decode_depay = (Gst.RTP.BaseDepayload)((Gst.Bin)encode).get_by_name(@"decode_$(rtpid)_rtp_depay"); pipe.add(decode); if (output != null) { decode.link(output); @@ -144,6 +149,110 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { created = true; push_recv_data = true; plugin.unpause(); + + GLib.Signal.emit_by_name(rtpbin, "get-session", rtpid, out session); + if (session != null && payload_type.rtcp_fbs.any_match((it) => it.type_ == "goog-remb")) { + Object internal_session; + session.@get("internal-session", out internal_session); + if (internal_session != null) { + internal_session.connect("signal::on-feedback-rtcp", on_feedback_rtcp, this); + } + Timeout.add(1000, () => remb_adjust()); + } + if (media == "video") { + codec_util.update_bitrate(media, payload_type, encode, 256); + } + } + + private uint remb = 256; + private int last_packets_lost = -1; + private uint64 last_packets_received; + private uint64 last_octets_received; + private bool remb_adjust() { + unowned Gst.Structure? stats; + if (session == null) { + debug("Session for %u finished, turning off remb adjustment", rtpid); + return Source.REMOVE; + } + session.get("stats", out stats); + if (stats == null) { + warning("No stats for session %u", rtpid); + return Source.REMOVE; + } + unowned ValueArray? source_stats; + stats.get("source-stats", typeof(ValueArray), out source_stats); + if (source_stats == null) { + warning("No source-stats for session %u", rtpid); + return Source.REMOVE; + } + foreach (Value value in source_stats.values) { + unowned Gst.Structure source_stat = (Gst.Structure) value.get_boxed(); + uint ssrc; + if (!source_stat.get_uint("ssrc", out ssrc)) continue; + if (ssrc.to_string() == participant_ssrc) { + int packets_lost; + uint64 packets_received, octets_received; + source_stat.get_int("packets-lost", out packets_lost); + source_stat.get_uint64("packets-received", out packets_received); + source_stat.get_uint64("octets-received", out octets_received); + int new_lost = packets_lost - last_packets_lost; + uint64 new_received = packets_received - last_packets_received; + uint64 new_octets = octets_received - last_octets_received; + if (new_received == 0) continue; + last_packets_lost = packets_lost; + last_packets_received = packets_received; + last_octets_received = octets_received; + double loss_rate = (double)new_lost / (double)(new_lost + new_received); + if (new_lost <= 0 || loss_rate < 0.02) { + remb = (uint)(1.08 * (double)remb); + } else if (loss_rate > 0.1) { + remb = (uint)((1.0 - 0.5 * loss_rate) * (double)remb); + } + remb = uint.max(remb, (uint)((new_octets * 8) / 1000)); + remb = uint.max(16, remb); // Never go below 16 + uint8[] data = new uint8[] { + 143, 206, 0, 5, + 0, 0, 0, 0, + 0, 0, 0, 0, + 'R', 'E', 'M', 'B', + 1, 0, 0, 0, + 0, 0, 0, 0 + }; + data[4] = (uint8)((encode_pay.ssrc >> 24) & 0xff); + data[5] = (uint8)((encode_pay.ssrc >> 16) & 0xff); + data[6] = (uint8)((encode_pay.ssrc >> 8) & 0xff); + data[7] = (uint8)(encode_pay.ssrc & 0xff); + uint8 br_exp = 0; + uint32 br_mant = remb * 1000; + uint8 bits = (uint8)Math.log2(br_mant); + if (bits > 16) { + br_exp = (uint8)bits - 16; + br_mant = br_mant >> br_exp; + } + data[17] = (uint8)((br_exp << 2) | ((br_mant >> 16) & 0x3)); + data[18] = (uint8)((br_mant >> 8) & 0xff); + data[19] = (uint8)(br_mant & 0xff); + data[20] = (uint8)((ssrc >> 24) & 0xff); + data[21] = (uint8)((ssrc >> 16) & 0xff); + data[22] = (uint8)((ssrc >> 8) & 0xff); + data[23] = (uint8)(ssrc & 0xff); + encrypt_and_send_rtcp(data); + } + } + return Source.CONTINUE; + } + + private static void on_feedback_rtcp(Gst.Element session, uint type, uint fbtype, uint sender_ssrc, uint media_ssrc, Gst.Buffer? fci, Stream self) { + if (type == 206 && fbtype == 15 && fci != null && sender_ssrc.to_string() == self.participant_ssrc) { + // https://tools.ietf.org/html/draft-alvestrand-rmcat-remb-03 + uint8[] data; + fci.extract_dup(0, fci.get_size(), out data); + if (data[0] != 'R' || data[1] != 'E' || data[2] != 'M' || data[3] != 'B') return; + uint8 br_exp = data[5] >> 2; + uint32 br_mant = (((uint32)data[5] & 0x3) << 16) + ((uint32)data[6] << 8) + (uint32)data[7]; + uint bitrate = (br_mant << br_exp) / 1000; + self.codec_util.update_bitrate(self.media, self.payload_type, self.encode, bitrate * 8); + } } private void prepare_local_crypto() { @@ -167,22 +276,26 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { if (crypto_session.has_encrypt) { data = crypto_session.encrypt_rtp(data); } - on_send_rtp_data(new Bytes.take(data)); + on_send_rtp_data(new Bytes.take((owned) data)); } else if (sink == send_rtcp) { - if (crypto_session.has_encrypt) { - data = crypto_session.encrypt_rtcp(data); - } - if (rtcp_mux) { - on_send_rtp_data(new Bytes.take(data)); - } else { - on_send_rtcp_data(new Bytes.take(data)); - } + encrypt_and_send_rtcp((owned) data); } else { warning("unknown sample"); } return Gst.FlowReturn.OK; } + private void encrypt_and_send_rtcp(owned uint8[] data) { + if (crypto_session.has_encrypt) { + data = crypto_session.encrypt_rtcp(data); + } + if (rtcp_mux) { + on_send_rtp_data(new Bytes.take((owned) data)); + } else { + on_send_rtcp_data(new Bytes.take((owned) data)); + } + } + private static Gst.PadProbeReturn drop_probe() { return Gst.PadProbeReturn.DROP; } @@ -211,6 +324,7 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { encode.get_static_pad("src").unlink(send_rtp_sink_pad); pipe.remove(encode); encode = null; + encode_pay = null; // Disconnect RTP sending if (send_rtp_src_pad != null) { @@ -243,6 +357,7 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { decode.set_state(Gst.State.NULL); pipe.remove(decode); decode = null; + decode_depay = null; output = null; // Disconnect output device @@ -276,6 +391,8 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { send_rtcp_src_pad = null; send_rtp_src_pad = null; recv_rtp_src_pad = null; + + session = null; } private void prepare_remote_crypto() { @@ -285,6 +402,9 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { } } + private uint16 previous_video_orientation_degree = uint16.MAX; + public signal void video_orientation_changed(uint16 degree); + public override void on_recv_rtp_data(Bytes bytes) { if (rtcp_mux && bytes.length >= 2 && bytes.get(1) >= 192 && bytes.get(1) < 224) { on_recv_rtcp_data(bytes); @@ -301,6 +421,33 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { } if (push_recv_data) { Gst.Buffer buffer = new Gst.Buffer.wrapped((owned) data); + Gst.RTP.Buffer rtp_buffer; + if (Gst.RTP.Buffer.map(buffer, Gst.MapFlags.READ, out rtp_buffer)) { + if (rtp_buffer.get_extension()) { + Xmpp.Xep.JingleRtp.HeaderExtension? ext = header_extensions.first_match((it) => it.uri == "urn:3gpp:video-orientation"); + if (ext != null) { + unowned uint8[] extension_data; + if (rtp_buffer.get_extension_onebyte_header(ext.id, 0, out extension_data) && extension_data.length == 1) { + bool camera = (extension_data[0] & 0x8) > 0; + bool flip = (extension_data[0] & 0x4) > 0; + uint8 rotation = extension_data[0] & 0x3; + uint16 rotation_degree = uint16.MAX; + switch(rotation) { + case 0: rotation_degree = 0; break; + case 1: rotation_degree = 90; break; + case 2: rotation_degree = 180; break; + case 3: rotation_degree = 270; break; + } + if (rotation_degree != previous_video_orientation_degree) { + video_orientation_changed(rotation_degree); + previous_video_orientation_degree = rotation_degree; + } + } + } + } + rtp_buffer.unmap(); + } + // FIXME: VAPI file in Vala < 0.49.1 has a bug that results in broken ownership of buffer in push_buffer() // We workaround by using the plain signal. The signal unfortunately will cause an unnecessary copy of // the underlying buffer, so and some point we should move over to the new version (once we require @@ -449,6 +596,8 @@ public class Dino.Plugins.Rtp.Stream : Xmpp.Xep.JingleRtp.Stream { public class Dino.Plugins.Rtp.VideoStream : Stream { private Gee.List<Gst.Element> outputs = new ArrayList<Gst.Element>(); private Gst.Element output_tee; + private Gst.Element rotate; + private ulong video_orientation_changed_handler; public VideoStream(Plugin plugin, Xmpp.Xep.Jingle.Content content) { base(plugin, content); @@ -456,11 +605,15 @@ public class Dino.Plugins.Rtp.VideoStream : Stream { } public override void create() { + video_orientation_changed_handler = video_orientation_changed.connect(on_video_orientation_changed); plugin.pause(); - output_tee = Gst.ElementFactory.make("tee", null); + rotate = Gst.ElementFactory.make("videoflip", @"video_rotate_$rtpid"); + pipe.add(rotate); + output_tee = Gst.ElementFactory.make("tee", @"video_tee_$rtpid"); output_tee.@set("allow-not-linked", true); pipe.add(output_tee); - add_output(output_tee); + rotate.link(output_tee); + add_output(rotate); base.create(); foreach (Gst.Element output in outputs) { output_tee.link(output); @@ -468,19 +621,44 @@ public class Dino.Plugins.Rtp.VideoStream : Stream { plugin.unpause(); } + private void on_video_orientation_changed(uint16 degree) { + if (rotate != null) { + switch (degree) { + case 0: + rotate.@set("method", 0); + break; + case 90: + rotate.@set("method", 1); + break; + case 180: + rotate.@set("method", 2); + break; + case 270: + rotate.@set("method", 3); + break; + } + } + } + public override void destroy() { foreach (Gst.Element output in outputs) { output_tee.unlink(output); } base.destroy(); + rotate.set_locked_state(true); + rotate.set_state(Gst.State.NULL); + rotate.unlink(output_tee); + pipe.remove(rotate); + rotate = null; output_tee.set_locked_state(true); output_tee.set_state(Gst.State.NULL); pipe.remove(output_tee); output_tee = null; + disconnect(video_orientation_changed_handler); } public override void add_output(Gst.Element element) { - if (element == output_tee) { + if (element == output_tee || element == rotate) { base.add_output(element); return; } @@ -491,7 +669,7 @@ public class Dino.Plugins.Rtp.VideoStream : Stream { } public override void remove_output(Gst.Element element) { - if (element == output_tee) { + if (element == output_tee || element == rotate) { base.remove_output(element); return; } |