Add support for TWCC feedbacks (#63)

.gitignore

@@ -24,3 +24,6 @@ ex_webrtc-*.tar
 
 # Temporary files, for example, from tests.
 /tmp/
+
+# I hate MacOS
+.DS_Store

examples/echo/assets/script.js

@@ -1,8 +1,8 @@
 const pcConfig = { 'iceServers': [{ 'urls': 'stun:stun.l.google.com:19302' },] };
 const mediaConstraints = {video: true, audio: true}
-const address = "ws://127.0.0.1:8829/ws"
 
-const ws = new WebSocket(address);
+const proto = window.location.protocol === "https:" ? "wss:" : "ws:"
+const ws = new WebSocket(`${proto}//${window.location.host}/ws`);
 ws.onopen = _ => start_connection(ws);
 ws.onclose = event => console.log("WebSocket connection was terminated:", event);
 

examples/echo/mix.lock

@@ -1,16 +1,16 @@
 %{
-  "bandit": {:hex, :bandit, "1.2.0", "2b5784909cc25b2514868055ff27458cdc63314514b90d86448ff91d18bece80", [:mix], [{:hpax, "~> 0.1.1", [hex: :hpax, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}, {:thousand_island, "~> 1.0", [hex: :thousand_island, repo: "hexpm", optional: false]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "05688b883d87cc3b32991517a61e8c2ce8ee2dd6aa6eb73635426002a6661491"},
+  "bandit": {:hex, :bandit, "1.2.1", "aa485b4ac175065b8e0fb5864ddd5dd7b50d52336b36f61c82f484c3718b3d15", [:mix], [{:hpax, "~> 0.1.1", [hex: :hpax, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}, {:thousand_island, "~> 1.0", [hex: :thousand_island, repo: "hexpm", optional: false]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "27393e590a407f1b7d51c5fee4737f139fe224a30449ce25061eac70f763896b"},
   "bunch": {:hex, :bunch, "1.6.1", "5393d827a64d5f846092703441ea50e65bc09f37fd8e320878f13e63d410aec7", [:mix], [], "hexpm", "286cc3add551628b30605efbe2fca4e38cc1bea89bcd0a1a7226920b3364fe4a"},
   "bunch_native": {:hex, :bunch_native, "0.5.0", "8ac1536789a597599c10b652e0b526d8833348c19e4739a0759a2bedfd924e63", [:mix], [{:bundlex, "~> 1.0", [hex: :bundlex, repo: "hexpm", optional: false]}], "hexpm", "24190c760e32b23b36edeb2dc4852515c7c5b3b8675b1a864e0715bdd1c8f80d"},
   "bundlex": {:hex, :bundlex, "1.4.5", "ea06cb441af636baaf5232dced24c6b1ee5ccbe7a7cad8a348eb3100fa1d7b52", [:mix], [{:bunch, "~> 1.0", [hex: :bunch, repo: "hexpm", optional: false]}, {:elixir_uuid, "~> 1.2", [hex: :elixir_uuid, repo: "hexpm", optional: false]}, {:qex, "~> 0.5", [hex: :qex, repo: "hexpm", optional: false]}, {:req, "~> 0.4.0", [hex: :req, repo: "hexpm", optional: false]}, {:zarex, "~> 1.0", [hex: :zarex, repo: "hexpm", optional: false]}], "hexpm", "bd4136100d3120740bf8eaa73ad74859d5ccd659cf0b27aa1645590a67a0172b"},
   "castore": {:hex, :castore, "1.0.5", "9eeebb394cc9a0f3ae56b813459f990abb0a3dedee1be6b27fdb50301930502f", [:mix], [], "hexpm", "8d7c597c3e4a64c395980882d4bca3cebb8d74197c590dc272cfd3b6a6310578"},
   "crc": {:hex, :crc, "0.10.5", "ee12a7c056ac498ef2ea985ecdc9fa53c1bfb4e53a484d9f17ff94803707dfd8", [:mix, :rebar3], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "3e673b6495a9525c5c641585af1accba59a1eb33de697bedf341e247012c2c7f"},
   "elixir_make": {:hex, :elixir_make, "0.7.8", "505026f266552ee5aabca0b9f9c229cbb496c689537c9f922f3eb5431157efc7", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.0", [hex: :certifi, repo: "hexpm", optional: true]}], "hexpm", "7a71945b913d37ea89b06966e1342c85cfe549b15e6d6d081e8081c493062c07"},
   "elixir_uuid": {:hex, :elixir_uuid, "1.2.1", "dce506597acb7e6b0daeaff52ff6a9043f5919a4c3315abb4143f0b00378c097", [:mix], [], "hexpm", "f7eba2ea6c3555cea09706492716b0d87397b88946e6380898c2889d68585752"},
-  "ex_dtls": {:hex, :ex_dtls, "0.15.0", "71a11b0379f4ebeb781548ead0e72194e650cfb6d6c435015c8b36e9e5574f62", [:mix], [{:unifex, "~> 1.0", [hex: :unifex, repo: "hexpm", optional: false]}], "hexpm", "3ff1d9ef6c4b0cc800105979c1c58dc67cada91c593beeae56e05094fdbce865"},
-  "ex_ice": {:hex, :ex_ice, "0.6.0", "7deb747f3813501a34b1103a8243981beed07767512d2b7007ee2c61e43b5f83", [:mix], [{:ex_stun, "~> 0.1.0", [hex: :ex_stun, repo: "hexpm", optional: false]}], "hexpm", "743917f921c26f12c13a096e93299b7a61bda0a6a44fe202e6fc5d0e2d5154af"},
+  "ex_dtls": {:hex, :ex_dtls, "0.15.1", "34b3600ff13eebf6c96be033005cc110ea5beef98394631365ec26b493df80c5", [:mix], [{:unifex, "~> 1.0", [hex: :unifex, repo: "hexpm", optional: false]}], "hexpm", "9cfebdfe9111c0f68c77667cb9366e4a6f17e8a240975ffd100148de57478a29"},
+  "ex_ice": {:hex, :ex_ice, "0.6.1", "6e28c38a750c36e8ecea359bcff8c88ed47be036d7b217f376480eccd1d2ed08", [:mix], [{:ex_stun, "~> 0.1.0", [hex: :ex_stun, repo: "hexpm", optional: false]}], "hexpm", "cdc5d0199930c2be66c473b7a60d4786c63d23a624f7f52a2b08c3ea059669fe"},
   "ex_libsrtp": {:hex, :ex_libsrtp, "0.7.2", "211bd89c08026943ce71f3e2c0231795b99cee748808ed3ae7b97cd8d2450b6b", [:mix], [{:bunch, "~> 1.6", [hex: :bunch, repo: "hexpm", optional: false]}, {:bundlex, "~> 1.3", [hex: :bundlex, repo: "hexpm", optional: false]}, {:membrane_precompiled_dependency_provider, "~> 0.1.0", [hex: :membrane_precompiled_dependency_provider, repo: "hexpm", optional: false]}, {:unifex, "~> 1.1", [hex: :unifex, repo: "hexpm", optional: false]}], "hexpm", "2e20645d0d739a4ecdcf8d4810a0c198120c8a2f617f2b75b2e2e704d59f492a"},
-  "ex_rtcp": {:hex, :ex_rtcp, "0.1.0", "2e02d23fc6ccc7e00aed13358ffdbcb23e34d3a7f35c66cadaa54447383ecae4", [:mix], [], "hexpm", "1c9a7e636f3950fbcefedce31f3e4ca60b84ea80ad519789f9d215167c60cb2b"},
+  "ex_rtcp": {:hex, :ex_rtcp, "0.2.0", "7599506340835d5e879ca04c6e90b25c56340ffedd4d345c14b1c0fc858446c9", [:mix], [], "hexpm", "5a5b47a2549bd2ae0bb03ec87f166f561c031ff6c8bbe189bde1e68e8578a99f"},
   "ex_rtp": {:hex, :ex_rtp, "0.3.0", "d18d0de39875958902816284f79c8cd51ec83d39bdd14edf6a5b069926268a43", [:mix], [], "hexpm", "cec8398237095b02438842cfc74487c3cbaeb7fe29e4c62ae11457a0ddd99754"},
   "ex_sdp": {:hex, :ex_sdp, "0.14.1", "3c49b0a39c919713a3691a5c0637954680e3ad9aec6f87dc9e5a01978a32124a", [:mix], [{:bunch, "~> 1.3", [hex: :bunch, repo: "hexpm", optional: false]}, {:elixir_uuid, "~> 1.2", [hex: :elixir_uuid, repo: "hexpm", optional: false]}], "hexpm", "a4d6637b8eda59f218368a677caecffc054f6fc3228bedf17aeb6bfa8a58a6ed"},
   "ex_stun": {:hex, :ex_stun, "0.1.0", "252474bf4c8519fbf4bc0fbfc6a1b846a634b1478c65dbbfb4b6ab4e33c2a95a", [:mix], [], "hexpm", "629fc8be45b624a92522f81d85ba001877b1f0745889a2419bdb678790d7480c"},
@@ -21,15 +21,16 @@
   "mime": {:hex, :mime, "2.0.5", "dc34c8efd439abe6ae0343edbb8556f4d63f178594894720607772a041b04b02", [:mix], [], "hexpm", "da0d64a365c45bc9935cc5c8a7fc5e49a0e0f9932a761c55d6c52b142780a05c"},
   "mint": {:hex, :mint, "1.5.2", "4805e059f96028948870d23d7783613b7e6b0e2fb4e98d720383852a760067fd", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "d77d9e9ce4eb35941907f1d3df38d8f750c357865353e21d335bdcdf6d892a02"},
   "nimble_options": {:hex, :nimble_options, "1.1.0", "3b31a57ede9cb1502071fade751ab0c7b8dbe75a9a4c2b5bbb0943a690b63172", [:mix], [], "hexpm", "8bbbb3941af3ca9acc7835f5655ea062111c9c27bcac53e004460dfd19008a99"},
+  "nimble_ownership": {:hex, :nimble_ownership, "0.2.1", "3e44c72ebe8dd213db4e13aff4090aaa331d158e72ce1891d02e0ffb05a1eb2d", [:mix], [], "hexpm", "bf38d2ef4fb990521a4ecf112843063c1f58a5c602484af4c7977324042badee"},
   "nimble_pool": {:hex, :nimble_pool, "1.0.0", "5eb82705d138f4dd4423f69ceb19ac667b3b492ae570c9f5c900bb3d2f50a847", [:mix], [], "hexpm", "80be3b882d2d351882256087078e1b1952a28bf98d0a287be87e4a24a710b67a"},
   "plug": {:hex, :plug, "1.15.3", "712976f504418f6dff0a3e554c40d705a9bcf89a7ccef92fc6a5ef8f16a30a97", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug_crypto, "~> 1.1.1 or ~> 1.2 or ~> 2.0", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "cc4365a3c010a56af402e0809208873d113e9c38c401cabd88027ef4f5c01fd2"},
   "plug_crypto": {:hex, :plug_crypto, "2.0.0", "77515cc10af06645abbfb5e6ad7a3e9714f805ae118fa1a70205f80d2d70fe73", [:mix], [], "hexpm", "53695bae57cc4e54566d993eb01074e4d894b65a3766f1c43e2c61a1b0f45ea9"},
   "qex": {:hex, :qex, "0.5.1", "0d82c0f008551d24fffb99d97f8299afcb8ea9cf99582b770bd004ed5af63fd6", [:mix], [], "hexpm", "935a39fdaf2445834b95951456559e9dc2063d0a055742c558a99987b38d6bab"},
-  "req": {:hex, :req, "0.4.8", "2b754a3925ddbf4ad78c56f30208ced6aefe111a7ea07fb56c23dccc13eb87ae", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.9", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 1.6 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "7146e51d52593bb7f20d00b5308a5d7d17d663d6e85cd071452b613a8277100c"},
+  "req": {:hex, :req, "0.4.9", "d079876e952f28b60fb0f595ae6492d1bc5b727b376746776014d541b9b56187", [:mix], [{:aws_signature, "~> 0.3.0", [hex: :aws_signature, repo: "hexpm", optional: true]}, {:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.17.0", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 1.6 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:nimble_ownership, "~> 0.2.0", [hex: :nimble_ownership, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "c8c2bff52a336586b63ee9f047078637e2e91073bf948e312f84caade28b521b"},
   "shmex": {:hex, :shmex, "0.5.0", "7dc4fb1a8bd851085a652605d690bdd070628717864b442f53d3447326bcd3e8", [:mix], [{:bunch_native, "~> 0.5.0", [hex: :bunch_native, repo: "hexpm", optional: false]}, {:bundlex, "~> 1.0", [hex: :bundlex, repo: "hexpm", optional: false]}], "hexpm", "b67bb1e22734758397c84458dbb746519e28eac210423c267c7248e59fc97bdc"},
   "telemetry": {:hex, :telemetry, "1.2.1", "68fdfe8d8f05a8428483a97d7aab2f268aaff24b49e0f599faa091f1d4e7f61c", [:rebar3], [], "hexpm", "dad9ce9d8effc621708f99eac538ef1cbe05d6a874dd741de2e689c47feafed5"},
   "thousand_island": {:hex, :thousand_island, "1.3.2", "bc27f9afba6e1a676dd36507d42e429935a142cf5ee69b8e3f90bff1383943cd", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "0e085b93012cd1057b378fce40cbfbf381ff6d957a382bfdd5eca1a98eec2535"},
-  "unifex": {:hex, :unifex, "1.1.0", "26b1bcb6c3b3454e1ea15f85b2e570aaa5b5c609566aa9f5c2e0a8b213379d6b", [:mix], [{:bunch, "~> 1.0", [hex: :bunch, repo: "hexpm", optional: false]}, {:bundlex, "~> 1.0", [hex: :bundlex, repo: "hexpm", optional: false]}, {:shmex, "~> 0.5.0", [hex: :shmex, repo: "hexpm", optional: false]}], "hexpm", "d8f47e9e3240301f5b20eec5792d1d4341e1a3a268d94f7204703b48da4aaa06"},
+  "unifex": {:hex, :unifex, "1.1.1", "e8445ff780ea07c10657428051e4cf84359f2770e27d24e9d8636430662691ff", [:mix], [{:bunch, "~> 1.0", [hex: :bunch, repo: "hexpm", optional: false]}, {:bundlex, "~> 1.4", [hex: :bundlex, repo: "hexpm", optional: false]}, {:shmex, "~> 0.5.0", [hex: :shmex, repo: "hexpm", optional: false]}], "hexpm", "3e2867237a5582a40cb7c88d9ed0955071ebb1c4d525345513544adc0abd3b4b"},
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
   "websock_adapter": {:hex, :websock_adapter, "0.5.5", "9dfeee8269b27e958a65b3e235b7e447769f66b5b5925385f5a569269164a210", [:mix], [{:bandit, ">= 0.6.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.6", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "4b977ba4a01918acbf77045ff88de7f6972c2a009213c515a445c48f224ffce9"},
   "zarex": {:hex, :zarex, "1.0.5", "58239e3ee5d75f343262bb4df5cf466555a1c689f920e5d3651a9333972f7c7e", [:mix], [], "hexpm", "9fb72ef0567c2b2742f5119a1ba8a24a2fabb21b8d09820aefbf3e592fa9a46a"},

examples/save_to_file/assets/script.js

@@ -4,11 +4,11 @@ const mediaConstraints = {audio: true, video: {
   height: { ideal: 480 },
   frameRate: { ideal: 15 }
 }}
-const address = "ws://127.0.0.1:8829/ws"
 
 const button = document.getElementById("button")
 button.onclick = () => {
-  const ws = new WebSocket(address);
+  const proto = window.location.protocol === "https:" ? "wss:" : "ws:"
+  const ws = new WebSocket(`${proto}//${window.location.host}/ws`);
   ws.onopen = _ => start_connection(ws);
   ws.onclose = event => console.log("WebSocket connection was terminated:", event);
 

examples/save_to_file/lib/save_to_file/peer_handler.ex

@@ -158,6 +158,12 @@ defmodule SaveToFile.PeerHandler do
     {:ok, state}
   end
 
+  defp handle_webrtc_msg({:rtp, _id, %{payload: <<>>}}, state) do
+    # we're ignoring packets with padding only, as these are most likely used
+    # for network bandwidth probing
+    {:ok, state}
+  end
+
   defp handle_webrtc_msg({:rtp, id, packet}, %{video_track_id: id} = state) do
     state =
       case VP8Depayloader.write(state.video_depayloader, packet) do
@@ -183,8 +189,7 @@ defmodule SaveToFile.PeerHandler do
     opus_packet = OpusDepayloader.depayload(packet)
     {:ok, audio_writer} = Ogg.Writer.write_packet(state.audio_writer, opus_packet)
 
-    state = %{state | audio_writer: audio_writer}
-    {:ok, state}
+    {:ok, %{state | audio_writer: audio_writer}}
   end
 
   defp handle_webrtc_msg(_msg, state), do: {:ok, state}