big stream progress

- stream manager (with bare bones ui)
- debug video tap
- toxav progress
- toxav debug ui
- some default devices

src/CMakeLists.txt

@@ -103,6 +103,13 @@ target_sources(tomato PUBLIC
 	./chat_gui4.hpp
 	./chat_gui4.cpp
 
+	./stream_manager.hpp
+	./stream_manager_ui.hpp
+	./stream_manager_ui.cpp
+
+	./debug_video_tap.hpp
+	./debug_video_tap.cpp
+
 	./content/content.hpp
 	./content/frame_stream2.hpp
 	./content/sdl_video_frame_stream2.hpp
@@ -116,6 +123,9 @@ if (TOMATO_TOX_AV)
 	target_sources(tomato PUBLIC
 		./tox_av.hpp
 		./tox_av.cpp
+
+		./debug_tox_call.hpp
+		./debug_tox_call.cpp
 	)
 
 	target_compile_definitions(tomato PUBLIC TOMATO_TOX_AV)

src/content/frame_stream2.hpp

@@ -33,6 +33,20 @@ struct FrameStream2I {
 	virtual bool push(const FrameType& value) = 0;
 };
 
+template<typename FrameType>
+struct FrameStream2SourceI {
+	virtual ~FrameStream2SourceI(void) {}
+	[[nodiscard]] virtual std::shared_ptr<FrameStream2I<FrameType>> subscribe(void) = 0;
+	virtual bool unsubscribe(const std::shared_ptr<FrameStream2I<FrameType>>& sub) = 0;
+};
+
+template<typename FrameType>
+struct FrameStream2SinkI {
+	virtual ~FrameStream2SinkI(void) {}
+	[[nodiscard]] virtual std::shared_ptr<FrameStream2I<FrameType>> subscribe(void) = 0;
+	virtual bool unsubscribe(const std::shared_ptr<FrameStream2I<FrameType>>& sub) = 0;
+};
+
 // needs count frames queue size
 // having ~1-2sec buffer size is often sufficent
 template<typename FrameType>
@@ -76,33 +90,52 @@ struct QueuedFrameStream2 : public FrameStream2I<FrameType> {
 	}
 };
 
-// implements a stream that pops or pushes to all sub streams
+// implements a stream that pushes to all sub streams
-// you need to mind the direction you intend it to use
 // release all streams before destructing! // TODO: improve lifetime here, maybe some shared semaphore?
 template<typename FrameType, typename SubStreamType = QueuedFrameStream2<FrameType>>
-struct FrameStream2MultiStream : public FrameStream2I<FrameType> {
+struct FrameStream2MultiSource : public FrameStream2SourceI<FrameType>, public FrameStream2I<FrameType> {
 	using sub_stream_type_t = SubStreamType;
 
 	// pointer stability
-	std::vector<std::unique_ptr<SubStreamType>> _sub_streams;
+	std::vector<std::shared_ptr<SubStreamType>> _sub_streams;
 	std::mutex _sub_stream_lock; // accessing the _sub_streams array needs to be exclusive
 	// a simple lock here is ok, since this tends to be a rare operation,
 	// except for the push, which is always on the same thread
 
-	// TODO: forward args instead
+	virtual ~FrameStream2MultiSource(void) {}
-	SubStreamType* aquireSubStream(size_t queue_size = 10, bool lossy = true) {
+
+	//// TODO: forward args instead
+	//SubStreamType* aquireSubStream(size_t queue_size = 10, bool lossy = true) {
+	//    std::lock_guard lg{_sub_stream_lock};
+	//    return _sub_streams.emplace_back(std::make_unique<SubStreamType>(queue_size, lossy)).get();
+	//}
+	std::shared_ptr<FrameStream2I<FrameType>> subscribe(void) override {
+		// TODO: args???
+		size_t queue_size = 10;
+		bool lossy = true;
+
 		std::lock_guard lg{_sub_stream_lock};
-		return _sub_streams.emplace_back(std::make_unique<SubStreamType>(queue_size, lossy)).get();
+		return _sub_streams.emplace_back(std::make_unique<SubStreamType>(queue_size, lossy));
 	}
 
-	void releaseSubStream(SubStreamType* sub) {
+	//void releaseSubStream(SubStreamType* sub) {
+	//    std::lock_guard lg{_sub_stream_lock};
+	//    for (auto it = _sub_streams.begin(); it != _sub_streams.end(); it++) {
+	//        if (it->get() == sub) {
+	//            _sub_streams.erase(it);
+	//            break;
+	//        }
+	//    }
+	//}
+	bool unsubscribe(const std::shared_ptr<FrameStream2I<FrameType>>& sub) override {
 		std::lock_guard lg{_sub_stream_lock};
 		for (auto it = _sub_streams.begin(); it != _sub_streams.end(); it++) {
-			if (it->get() == sub) {
+			if (*it == sub) {
 				_sub_streams.erase(it);
-				break;
+				return true;
 			}
 		}
+		return false; // ?
 	}
 
 	// stream interface
@@ -113,6 +146,7 @@ struct FrameStream2MultiStream : public FrameStream2I<FrameType> {
 	}
 
 	std::optional<FrameType> pop(void) override {
+		// nope
 		assert(false && "this logic is very frame type specific, provide an impl");
 		return std::nullopt;
 	}

src/content/sdl_audio_frame_stream2.cpp

@@ -124,7 +124,7 @@ bool SDLAudioOutputDeviceDefaultInstance::push(const AudioFrame& value) {
 		std::cerr << "empty audio frame??\n";
 	}
 
-	if (SDL_PutAudioStreamData(_stream.get(), data.ptr, data.size * sizeof(int16_t)) < 0) {
+	if (!SDL_PutAudioStreamData(_stream.get(), data.ptr, data.size * sizeof(int16_t))) {
 		std::cerr << "put data error\n";
 		return false; // return true?
 	}
@@ -145,26 +145,40 @@ SDLAudioOutputDeviceDefaultInstance::SDLAudioOutputDeviceDefaultInstance(SDLAudi
 SDLAudioOutputDeviceDefaultInstance::~SDLAudioOutputDeviceDefaultInstance(void) {
 }
 
-SDLAudioOutputDeviceDefaultInstance SDLAudioOutputDeviceDefaultFactory::create(void) {
+
-	SDLAudioOutputDeviceDefaultInstance new_instance;
+SDLAudioOutputDeviceDefaultSink::~SDLAudioOutputDeviceDefaultSink(void) {
+	// TODO: pause and close device?
+}
+
+std::shared_ptr<FrameStream2I<AudioFrame>> SDLAudioOutputDeviceDefaultSink::subscribe(void) {
+	auto new_instance = std::make_shared<SDLAudioOutputDeviceDefaultInstance>();
 
 	constexpr SDL_AudioSpec spec = { SDL_AUDIO_S16, 1, 48000 };
 
-	new_instance._stream = {
+	new_instance->_stream = {
 		SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &spec, nullptr, nullptr),
 		&SDL_DestroyAudioStream
 	};
-	new_instance._last_sample_rate = spec.freq;
+	new_instance->_last_sample_rate = spec.freq;
-	new_instance._last_channels = spec.channels;
+	new_instance->_last_channels = spec.channels;
-	new_instance._last_format = spec.format;
+	new_instance->_last_format = spec.format;
 
-	if (!static_cast<bool>(new_instance._stream)) {
+	if (!static_cast<bool>(new_instance->_stream)) {
 		std::cerr << "SDL open audio device failed!\n";
+		return nullptr;
 	}
 
-	const auto audio_device_id = SDL_GetAudioStreamDevice(new_instance._stream.get());
+	const auto audio_device_id = SDL_GetAudioStreamDevice(new_instance->_stream.get());
 	SDL_ResumeAudioDevice(audio_device_id);
 
 	return new_instance;
 }
 
+bool SDLAudioOutputDeviceDefaultSink::unsubscribe(const std::shared_ptr<FrameStream2I<AudioFrame>>& sub) {
+	if (!sub) {
+		return false;
+	}
+
+	return true;
+}
+

src/content/sdl_audio_frame_stream2.hpp

@@ -11,13 +11,13 @@
 #include <thread>
 
 // we dont have to multicast ourself, because sdl streams and virtual devices already do this, but we do it anyway
-using AudioFrameStream2MultiStream = FrameStream2MultiStream<AudioFrame>;
+using AudioFrameStream2MultiSource = FrameStream2MultiSource<AudioFrame>;
-using AudioFrameStream2 = AudioFrameStream2MultiStream::sub_stream_type_t; // just use the default for now
+using AudioFrameStream2 = AudioFrameStream2MultiSource::sub_stream_type_t; // just use the default for now
 
 // object components?
 
 // source
-struct SDLAudioInputDeviceDefault : protected AudioFrameStream2MultiStream {
+struct SDLAudioInputDeviceDefault : protected AudioFrameStream2MultiSource {
 	std::unique_ptr<SDL_AudioStream, decltype(&SDL_DestroyAudioStream)> _stream;
 
 	std::atomic<bool> _thread_should_quit {false};
@@ -30,12 +30,12 @@ struct SDLAudioInputDeviceDefault : protected AudioFrameStream2MultiStream {
 	// stops the thread and closes the device?
 	~SDLAudioInputDeviceDefault(void);
 
-	using AudioFrameStream2MultiStream::aquireSubStream;
+	using AudioFrameStream2MultiSource::subscribe;
-	using AudioFrameStream2MultiStream::releaseSubStream;
+	using AudioFrameStream2MultiSource::unsubscribe;
 };
 
 // sink
-struct SDLAudioOutputDeviceDefaultInstance : protected AudioFrameStream2I {
+struct SDLAudioOutputDeviceDefaultInstance : public AudioFrameStream2I {
 	std::unique_ptr<SDL_AudioStream, decltype(&SDL_DestroyAudioStream)> _stream;
 
 	uint32_t _last_sample_rate {48'000};
@@ -53,9 +53,12 @@ struct SDLAudioOutputDeviceDefaultInstance : protected AudioFrameStream2I {
 };
 
 // constructs entirely new streams, since sdl handles sync and mixing for us (or should)
-struct SDLAudioOutputDeviceDefaultFactory {
+struct SDLAudioOutputDeviceDefaultSink : public FrameStream2SinkI<AudioFrame> {
 	// TODO: pause device?
 
-	SDLAudioOutputDeviceDefaultInstance create(void);
+	~SDLAudioOutputDeviceDefaultSink(void);
+
+	std::shared_ptr<FrameStream2I<AudioFrame>> subscribe(void) override;
+	bool unsubscribe(const std::shared_ptr<FrameStream2I<AudioFrame>>& sub) override;
 };
 

src/content/sdl_video_frame_stream2.cpp

@@ -1,4 +1,6 @@
 #include "./sdl_video_frame_stream2.hpp"
+#include "SDL3/SDL_camera.h"
+#include "SDL3/SDL_pixels.h"
 
 #include <chrono>
 #include <cstdint>
@@ -6,6 +8,7 @@
 #include <memory>
 #include <thread>
 
+// TODO: move out and create lazy cam for each device
 SDLVideoCameraContent::SDLVideoCameraContent(void) {
 	int devcount {0};
 	//SDL_CameraDeviceID *devices = SDL_GetCameraDevices(&devcount);
@@ -25,7 +28,6 @@ SDLVideoCameraContent::SDLVideoCameraContent(void) {
 
 		int speccount {0};
 		SDL_CameraSpec** specs = SDL_GetCameraSupportedFormats(device, &speccount);
-		//SDL_CameraSpec* specs = SDL_GetCameraSupportedFormats(device, &speccount);
 		if (specs == nullptr) {
 			std::cout << "    - no supported spec\n";
 		} else {
@@ -42,22 +44,29 @@ SDLVideoCameraContent::SDLVideoCameraContent(void) {
 			// FORCE a diffrent pixel format
 			//SDL_PIXELFORMAT_RGBA8888,
 			//SDL_PIXELFORMAT_UNKNOWN,
-			SDL_PIXELFORMAT_IYUV,
+			//SDL_PIXELFORMAT_IYUV,
+			SDL_PIXELFORMAT_YUY2,
 
-			SDL_COLORSPACE_SRGB,
 			//SDL_COLORSPACE_UNKNOWN,
+			//SDL_COLORSPACE_SRGB,
+			//SDL_COLORSPACE_SRGB_LINEAR,
+			SDL_COLORSPACE_YUV_DEFAULT,
 
 			//1280, 720,
 			//640, 360,
-			640, 480,
+			//640, 480,
+			696, 392,
 
 			//1, 30
 			30, 1
 		};
 		_camera = {
-			SDL_OpenCamera(devices[0], &spec),
+			//SDL_OpenCamera(devices[devcount-1], &spec),
+			SDL_OpenCamera(devices[0], nullptr),
+			//SDL_OpenCamera(devices[0], &spec),
 			&SDL_CloseCamera
 		};
+		SDL_GetCameraFormat(_camera.get(), &spec);
 	}
 	SDL_free(devices);
 	if (!static_cast<bool>(_camera)) {
@@ -76,8 +85,9 @@ SDLVideoCameraContent::SDLVideoCameraContent(void) {
 
 	SDL_CameraSpec spec;
 	float fps {1.f};
-	if (SDL_GetCameraFormat(_camera.get(), &spec) != 0) {
+	if (!SDL_GetCameraFormat(_camera.get(), &spec)) {
 		// meh
+		throw int(5);
 	} else {
 		fps = float(spec.framerate_numerator)/float(spec.framerate_denominator);
 		std::cout << "camera fps: " << fps << "fps (" << spec.framerate_numerator << "/" << spec.framerate_denominator << ")\n";

src/content/sdl_video_frame_stream2.hpp

@@ -28,25 +28,28 @@ struct SDLVideoFrame {
 	SDLVideoFrame(const SDLVideoFrame& other) {
 		timestampNS = other.timestampNS;
 		if (static_cast<bool>(other.surface)) {
-			// TODO: use SDL_DuplicateSurface()
+			//surface = {
+			//    SDL_CreateSurface(
+			//        other.surface->w,
+			//        other.surface->h,
+			//        other.surface->format
+			//    ),
+			//    &SDL_DestroySurface
+			//};
+			//SDL_BlitSurface(other.surface.get(), nullptr, surface.get(), nullptr);
 			surface = {
-				SDL_CreateSurface(
+				SDL_DuplicateSurface(other.surface.get()),
-					other.surface->w,
+			    &SDL_DestroySurface
-					other.surface->h,
-					other.surface->format
-				),
-				&SDL_DestroySurface
 			};
-			SDL_BlitSurface(other.surface.get(), nullptr, surface.get(), nullptr);
 		}
 	}
 	SDLVideoFrame& operator=(const SDLVideoFrame& other) = delete;
 };
 
-using SDLVideoFrameStream2MultiStream = FrameStream2MultiStream<SDLVideoFrame>;
+using SDLVideoFrameStream2MultiSource = FrameStream2MultiSource<SDLVideoFrame>;
-using SDLVideoFrameStream2 = SDLVideoFrameStream2MultiStream::sub_stream_type_t; // just use the default for now
+using SDLVideoFrameStream2 = SDLVideoFrameStream2MultiSource::sub_stream_type_t; // just use the default for now
 
-struct SDLVideoCameraContent : protected SDLVideoFrameStream2MultiStream {
+struct SDLVideoCameraContent : public SDLVideoFrameStream2MultiSource {
 	// meh, empty default
 	std::unique_ptr<SDL_Camera, decltype(&SDL_CloseCamera)> _camera {nullptr, &SDL_CloseCamera};
 	std::atomic<bool> _thread_should_quit {false};
@@ -60,7 +63,7 @@ struct SDLVideoCameraContent : protected SDLVideoFrameStream2MultiStream {
 	~SDLVideoCameraContent(void);
 
 	// make only some of writer public
-	using SDLVideoFrameStream2MultiStream::aquireSubStream;
+	using SDLVideoFrameStream2MultiSource::subscribe;
-	using SDLVideoFrameStream2MultiStream::releaseSubStream;
+	using SDLVideoFrameStream2MultiSource::unsubscribe;
 };
 

src/debug_tox_call.cpp

@@ -0,0 +1,226 @@
+#include "./debug_tox_call.hpp"
+
+#include <SDL3/SDL.h>
+
+#include <cstdint>
+#include <imgui/imgui.h>
+
+#include <cstring>
+
+#include <iostream>
+
+// fwd
+namespace Message {
+	uint64_t getTimeMS(void);
+}
+
+static constexpr float lerp(float a, float b, float t) {
+	return a + t * (b - a);
+}
+
+namespace Components {
+	struct ToxAVFriendAudioSource {
+	};
+
+	struct ToxAVFriendAudioSink {
+	};
+
+	struct ToxAVFriendVideoSource {
+	};
+
+	struct ToxAVFriendVideoSink {
+	};
+}
+
+DebugToxCall::DebugToxCall(ObjectStore2& os, ToxAV& toxav, TextureUploaderI& tu) : _os(os), _toxav(toxav), _tu(tu) {
+	_toxav.subscribe(this, ToxAV_Event::friend_call);
+	_toxav.subscribe(this, ToxAV_Event::friend_call_state);
+	_toxav.subscribe(this, ToxAV_Event::friend_audio_bitrate);
+	_toxav.subscribe(this, ToxAV_Event::friend_video_bitrate);
+	_toxav.subscribe(this, ToxAV_Event::friend_audio_frame);
+	_toxav.subscribe(this, ToxAV_Event::friend_video_frame);
+}
+
+void DebugToxCall::tick(float time_delta) {
+}
+
+float DebugToxCall::render(void) {
+	float next_frame {2.f};
+	if (ImGui::Begin("toxav debug")) {
+		ImGui::Text("Calls:");
+		ImGui::Indent();
+		for (auto& [fid, call] : _calls) {
+			ImGui::PushID(fid);
+
+			ImGui::Text("fid:%d state:%d", fid, call.state);
+			if (call.incoming) {
+				ImGui::SameLine();
+				if (ImGui::SmallButton("answer")) {
+					const auto ret = _toxav.toxavAnswer(fid, 0, 0);
+					if (ret == TOXAV_ERR_ANSWER_OK) {
+						call.incoming = false;
+					}
+				}
+			} else if (call.state != TOXAV_FRIEND_CALL_STATE_FINISHED) {
+				next_frame = std::min(next_frame, 0.1f);
+				ImGui::SameLine();
+				if (ImGui::SmallButton("hang up")) {
+					const auto ret = _toxav.toxavCallControl(fid, TOXAV_CALL_CONTROL_CANCEL);
+					if (ret == TOXAV_ERR_CALL_CONTROL_OK) {
+						// we hung up
+						// not sure if its possible for toxcore to tell this us too when the other side does this at the same time?
+						call.state = TOXAV_FRIEND_CALL_STATE_FINISHED;
+					}
+				}
+
+				//if (ImGui::BeginCombo("audio src", "---")) {
+				//    ImGui::EndCombo();
+				//}
+				//if (ImGui::BeginCombo("video src", "---")) {
+				//    ImGui::EndCombo();
+				//}
+			}
+
+			//if (call.last_v_frame_tex != 0 && ImGui::BeginItemTooltip()) {
+			if (call.last_v_frame_tex != 0) {
+				next_frame = std::min(next_frame, call.v_frame_interval_avg);
+				ImGui::Text("vframe interval avg: %f", call.v_frame_interval_avg);
+				ImGui::Image(
+					reinterpret_cast<ImTextureID>(call.last_v_frame_tex),
+					//ImVec2{float(call.last_v_frame_width), float(call.last_v_frame_height)}
+					ImVec2{100.f, 100.f * float(call.last_v_frame_height)/call.last_v_frame_width}
+				);
+				//ImGui::EndTooltip();
+			}
+
+			ImGui::PopID();
+		}
+		ImGui::Unindent();
+	}
+	ImGui::End();
+
+	return next_frame;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendCall& e)  {
+	auto& call = _calls[e.friend_number];
+	call.incoming = true;
+	call.incoming_a = e.audio_enabled;
+	call.incoming_v = e.video_enabled;
+	//call.state = TOXAV_FRIEND_CALL_STATE_NONE;
+
+	return true;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendCallState& e)  {
+	auto& call = _calls[e.friend_number];
+	call.state = e.state;
+
+	return true;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendAudioBitrate&)  {
+	return false;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendVideoBitrate&)  {
+	return false;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendAudioFrame& e)  {
+	auto& call = _calls[e.friend_number];
+	call.num_a_frames++;
+	return false;
+}
+
+bool DebugToxCall::onEvent(const Events::FriendVideoFrame& e)  {
+	auto& call = _calls[e.friend_number];
+	call.num_v_frames++;
+
+	if (call.last_v_frame_timepoint == 0) {
+		call.last_v_frame_timepoint = Message::getTimeMS();
+	} else {
+		const auto new_time_point = Message::getTimeMS();
+		auto time_delta_ms = new_time_point - call.last_v_frame_timepoint;
+		call.last_v_frame_timepoint = new_time_point;
+		time_delta_ms = std::min<uint64_t>(time_delta_ms, 10*1000); // cap at 10sec
+
+		if (call.v_frame_interval_avg == 0) {
+			call.v_frame_interval_avg = time_delta_ms/1000.f;
+		} else {
+			std::cerr << "lerp(" << call.v_frame_interval_avg << ", " << time_delta_ms/1000.f << ", 0.2f) = ";
+			call.v_frame_interval_avg = lerp(call.v_frame_interval_avg, time_delta_ms/1000.f, 0.2f);
+			std::cerr << call.v_frame_interval_avg << "\n";
+		}
+	}
+
+	auto* new_surf = SDL_CreateSurface(e.width, e.height, SDL_PIXELFORMAT_IYUV);
+	assert(new_surf);
+	if (SDL_LockSurface(new_surf)) {
+		// copy the data
+		// we know how the implementation works, its y u v consecutivlely
+		// y
+		for (size_t y = 0; y < e.height; y++) {
+			std::memcpy(
+				//static_cast<uint8_t*>(new_surf->pixels) + new_surf->pitch*y,
+				static_cast<uint8_t*>(new_surf->pixels) + e.width*y,
+				e.y.ptr + e.ystride*y,
+				e.width
+			);
+		}
+
+		// u
+		for (size_t y = 0; y < e.height/2; y++) {
+			std::memcpy(
+				static_cast<uint8_t*>(new_surf->pixels) + (e.width*e.height) + (e.width/2)*y,
+				e.u.ptr + e.ustride*y,
+				e.width/2
+			);
+		}
+
+		// v
+		for (size_t y = 0; y < e.height/2; y++) {
+			std::memcpy(
+				static_cast<uint8_t*>(new_surf->pixels) + (e.width*e.height) + ((e.width/2)*(e.height/2)) + (e.width/2)*y,
+				e.v.ptr + e.vstride*y,
+				e.width/2
+			);
+		}
+
+		SDL_UnlockSurface(new_surf);
+	}
+
+	auto* converted_surf = SDL_ConvertSurfaceAndColorspace(new_surf, SDL_PIXELFORMAT_RGBA32, nullptr, SDL_COLORSPACE_YUV_DEFAULT, 0);
+	SDL_DestroySurface(new_surf);
+	if (converted_surf == nullptr) {
+		assert(false);
+		return true;
+	}
+
+	SDL_LockSurface(converted_surf);
+	if (call.last_v_frame_tex == 0 || call.last_v_frame_width != e.width || call.last_v_frame_height != e.height) {
+		_tu.destroy(call.last_v_frame_tex);
+		call.last_v_frame_tex = _tu.uploadRGBA(
+			static_cast<const uint8_t*>(converted_surf->pixels),
+			converted_surf->w,
+			converted_surf->h,
+			TextureUploaderI::LINEAR,
+			TextureUploaderI::STREAMING
+		);
+
+		call.last_v_frame_width = e.width;
+		call.last_v_frame_height = e.height;
+	} else {
+		_tu.updateRGBA(call.last_v_frame_tex, static_cast<const uint8_t*>(converted_surf->pixels), converted_surf->w * converted_surf->h * 4);
+	}
+	SDL_UnlockSurface(converted_surf);
+	SDL_DestroySurface(converted_surf);
+
+	// TODO: use this instead
+	//SDL_UpdateYUVTexture(tex, nullptr, e.y.ptr, e.ystride,...
+
+	std::cout << "DTC: updated video texture " << call.last_v_frame_tex << "\n";
+
+	return false;
+}
+

src/debug_tox_call.hpp

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <solanaceae/object_store/fwd.hpp>
+#include "./tox_av.hpp"
+#include "./texture_uploader.hpp"
+
+#include <map>
+#include <cstdint>
+
+class DebugToxCall : public ToxAVEventI {
+	ObjectStore2& _os;
+	ToxAV& _toxav;
+	TextureUploaderI& _tu;
+
+	struct Call {
+		bool incoming {false};
+		bool incoming_a {false};
+		bool incoming_v {false};
+
+		uint32_t state {0}; // ? just last state ?
+
+		uint32_t abr {0};
+		uint32_t vbr {0};
+
+		size_t num_a_frames {0};
+		size_t num_v_frames {0};
+
+		// fps moving interval
+		uint64_t last_v_frame_timepoint {0};
+		float v_frame_interval_avg {0.f};
+
+		uint64_t last_v_frame_tex {0};
+		uint64_t last_v_frame_width {0};
+		uint64_t last_v_frame_height {0};
+	};
+	// tox friend id -> call
+	std::map<uint32_t, Call> _calls;
+
+	public:
+		DebugToxCall(ObjectStore2& os, ToxAV& toxav, TextureUploaderI& tu);
+		~DebugToxCall(void) {}
+
+		void tick(float time_delta);
+		float render(void);
+
+	protected: // toxav events
+		bool onEvent(const Events::FriendCall&) override;
+		bool onEvent(const Events::FriendCallState&) override;
+		bool onEvent(const Events::FriendAudioBitrate&) override;
+		bool onEvent(const Events::FriendVideoBitrate&) override;
+		bool onEvent(const Events::FriendAudioFrame&) override;
+		bool onEvent(const Events::FriendVideoFrame&) override;
+};

src/debug_video_tap.cpp

@@ -0,0 +1,204 @@
+#include "./debug_video_tap.hpp"
+
+#include <solanaceae/object_store/object_store.hpp>
+
+#include <entt/entity/entity.hpp>
+
+#include <SDL3/SDL.h>
+
+#include <imgui/imgui.h>
+
+#include "./content/sdl_video_frame_stream2.hpp"
+
+#include <string>
+#include <memory>
+#include <iostream>
+
+struct DebugVideoTapSink : public FrameStream2SinkI<SDLVideoFrame> {
+	std::shared_ptr<QueuedFrameStream2<SDLVideoFrame>> _writer;
+
+	DebugVideoTapSink(void) {}
+	~DebugVideoTapSink(void) {}
+
+	// sink
+	std::shared_ptr<FrameStream2I<SDLVideoFrame>> subscribe(void) override {
+		if (_writer) {
+			// max 1 (exclusive)
+			return nullptr;
+		}
+
+		_writer = std::make_shared<QueuedFrameStream2<SDLVideoFrame>>(1, true);
+
+		return _writer;
+	}
+
+	bool unsubscribe(const std::shared_ptr<FrameStream2I<SDLVideoFrame>>& sub) override {
+		if (!sub || !_writer) {
+			// nah
+			return false;
+		}
+
+		if (sub == _writer) {
+			_writer =  nullptr;
+			return true;
+		}
+
+		// what
+		return false;
+	}
+};
+
+DebugVideoTap::DebugVideoTap(ObjectStore2& os, StreamManager& sm, TextureUploaderI& tu) : _os(os), _sm(sm), _tu(tu) {
+	// post self as video sink
+	_tap = {_os.registry(), _os.registry().create()};
+	try {
+		auto dvts = std::make_unique<DebugVideoTapSink>();
+		_tap.emplace<DebugVideoTapSink*>(dvts.get()); // to get our data back
+		_tap.emplace<Components::FrameStream2Sink<SDLVideoFrame>>(
+			std::move(dvts)
+		);
+
+		_tap.emplace<Components::StreamSink>("DebugVideoTap", std::string{entt::type_name<SDLVideoFrame>::value()});
+	} catch (...) {
+		_os.registry().destroy(_tap);
+	}
+}
+
+DebugVideoTap::~DebugVideoTap(void) {
+	if (static_cast<bool>(_tap)) {
+		_os.registry().destroy(_tap);
+	}
+}
+
+float DebugVideoTap::render(void) {
+	if (ImGui::Begin("DebugVideoTap")) {
+		// list sources dropdown to connect too
+		std::string preview_label {"none"};
+		if (static_cast<bool>(_selected_src)) {
+			preview_label = std::to_string(entt::to_integral(_selected_src.entity())) + " (" + _selected_src.get<Components::StreamSource>().name + ")";
+		}
+
+		if (ImGui::BeginCombo("selected source", preview_label.c_str())) {
+			if (ImGui::Selectable("none")) {
+				switchTo({});
+			}
+
+			for (const auto& [oc, ss] : _os.registry().view<Components::StreamSource>().each()) {
+				if (ss.frame_type_name != entt::type_name<SDLVideoFrame>::value()) {
+					continue;
+				}
+				std::string label = std::to_string(entt::to_integral(oc)) + " (" + ss.name + ")";
+				if (ImGui::Selectable(label.c_str())) {
+					switchTo({_os.registry(), oc});
+				}
+			}
+
+			ImGui::EndCombo();
+		}
+
+		{ // first pull the latest img from sink and update the texture
+			assert(static_cast<bool>(_tap));
+
+			auto& dvtsw = _tap.get<DebugVideoTapSink*>()->_writer;
+			if (dvtsw) {
+				while (true) {
+					auto new_frame_opt = dvtsw->pop();
+					if (new_frame_opt.has_value()) {
+						// timing
+						if (_v_last_ts == 0) {
+							_v_last_ts = new_frame_opt.value().timestampNS;
+						} else {
+							auto delta = int64_t(new_frame_opt.value().timestampNS) - int64_t(_v_last_ts);
+							_v_last_ts = new_frame_opt.value().timestampNS;
+
+							//delta = std::min<int64_t>(delta, 10*1000*1000);
+
+							if (_v_interval_avg == 0) {
+								_v_interval_avg = delta/1'000'000'000.f;
+							} else {
+								const float r = 0.2f;
+								_v_interval_avg = _v_interval_avg * (1-r) + (delta/1'000'000'000.f) * r;
+							}
+						}
+
+						SDL_Surface* new_frame_surf = new_frame_opt.value().surface.get();
+
+						SDL_Surface* converted_surf = new_frame_surf;
+						if (new_frame_surf->format != SDL_PIXELFORMAT_RGBA32) {
+							// we need to convert
+							//std::cerr << "DVT: need to convert\n";
+							converted_surf = SDL_ConvertSurfaceAndColorspace(new_frame_surf, SDL_PIXELFORMAT_RGBA32, nullptr, SDL_COLORSPACE_RGB_DEFAULT, 0);
+							assert(converted_surf->format == SDL_PIXELFORMAT_RGBA32);
+						}
+
+						SDL_LockSurface(converted_surf);
+						if (_tex == 0 || (int)_tex_w != converted_surf->w || (int)_tex_h != converted_surf->h) {
+							_tu.destroy(_tex);
+							_tex = _tu.uploadRGBA(
+								static_cast<const uint8_t*>(converted_surf->pixels),
+								converted_surf->w,
+								converted_surf->h,
+								TextureUploaderI::LINEAR,
+								TextureUploaderI::STREAMING
+							);
+
+							_tex_w = converted_surf->w;
+							_tex_h = converted_surf->h;
+						} else {
+							_tu.updateRGBA(_tex, static_cast<const uint8_t*>(converted_surf->pixels), converted_surf->w * converted_surf->h * 4);
+						}
+						SDL_UnlockSurface(converted_surf);
+
+						if (new_frame_surf != converted_surf) {
+							// clean up temp
+							SDL_DestroySurface(converted_surf);
+						}
+					} else {
+						break;
+					}
+				}
+			}
+		}
+
+		// img here
+		if (_tex != 0) {
+			ImGui::Text("moving avg interval: %f", _v_interval_avg);
+			const float img_w = ImGui::GetContentRegionAvail().x;
+			ImGui::Image(
+				reinterpret_cast<ImTextureID>(_tex),
+				ImVec2{img_w, img_w * float(_tex_h)/_tex_w}
+			);
+		}
+	}
+	ImGui::End();
+
+	if (_v_interval_avg != 0) {
+		return _v_interval_avg;
+	} else {
+		return 2.f;
+	}
+}
+
+void DebugVideoTap::switchTo(ObjectHandle o) {
+	if (o == _selected_src) {
+		std::cerr << "DVT: switch to same ...\n";
+		return;
+	}
+
+	_tu.destroy(_tex);
+	_tex = 0;
+	_v_last_ts = 0;
+	_v_interval_avg = 0;
+
+	if (static_cast<bool>(_selected_src)) {
+		_sm.disconnect<SDLVideoFrame>(_selected_src, _tap);
+	}
+
+	if (static_cast<bool>(o) && _sm.connect<SDLVideoFrame>(o, _tap)) {
+		_selected_src = o;
+	} else {
+		std::cerr << "DVT: cleared video source\n";
+		_selected_src = {};
+	}
+}
+

src/debug_video_tap.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <cstdint>
+#include <solanaceae/object_store/fwd.hpp>
+#include "./stream_manager.hpp"
+#include "./texture_uploader.hpp"
+
+// provides a sink and a small window displaying a SDLVideoFrame
+class DebugVideoTap {
+	ObjectStore2& _os;
+	StreamManager& _sm;
+	TextureUploaderI& _tu;
+
+	ObjectHandle _selected_src;
+	ObjectHandle _tap;
+
+	uint64_t _tex {0};
+	uint32_t _tex_w {0};
+	uint32_t _tex_h {0};
+
+	uint64_t _v_last_ts {0}; // ns
+	float _v_interval_avg {0.f}; // s
+
+	public:
+		DebugVideoTap(ObjectStore2& os, StreamManager& sm, TextureUploaderI& tu);
+		~DebugVideoTap(void);
+
+		float render(void);
+
+		void switchTo(ObjectHandle o);
+};
+

src/main.cpp

@@ -38,7 +38,7 @@ int main(int argc, char** argv) {
 
 	// setup hints
 #ifndef __ANDROID__
-	if (SDL_SetHint(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1") != SDL_TRUE) {
+	if (!SDL_SetHint(SDL_HINT_VIDEO_ALLOW_SCREENSAVER, "1")) {
 		std::cerr << "Failed to set '" << SDL_HINT_VIDEO_ALLOW_SCREENSAVER << "' to 1\n";
 	}
 #endif
@@ -76,34 +76,34 @@ int main(int argc, char** argv) {
 	std::cout << "SDL Renderer: " << SDL_GetRendererName(renderer.get()) << "\n";
 
 	// optionally init audio and camera
-	if (SDL_Init(SDL_INIT_AUDIO) < 0) {
+	if (!SDL_Init(SDL_INIT_AUDIO)) {
 		std::cerr << "SDL_Init AUDIO failed (" << SDL_GetError() << ")\n";
 	} else if (false) {
 		SDLAudioInputDeviceDefault aidd;
-		auto* reader = aidd.aquireSubStream();
+		auto reader = aidd.subscribe();
 
-		auto writer = SDLAudioOutputDeviceDefaultFactory{}.create();
+		auto writer = SDLAudioOutputDeviceDefaultSink{}.subscribe();
 
-		for (size_t i = 0; i < 100; i++) {
+		for (size_t i = 0; i < 200; i++) {
 			std::this_thread::sleep_for(std::chrono::milliseconds(10));
 			auto new_frame_opt = reader->pop();
 			if (new_frame_opt.has_value()) {
 				std::cout << "audio frame was seq:" << new_frame_opt.value().seq << " sr:" << new_frame_opt.value().sample_rate << " " << (new_frame_opt.value().isS16()?"S16":"F32") << " l:" << (new_frame_opt.value().isS16()?new_frame_opt.value().getSpan<int16_t>().size:new_frame_opt.value().getSpan<float>().size) << "\n";
-				writer.push(new_frame_opt.value());
+				writer->push(new_frame_opt.value());
 			} else {
 				std::cout << "no audio frame\n";
 			}
 		}
 
-		aidd.releaseSubStream(reader);
+		aidd.unsubscribe(reader);
 	}
 
-	if (SDL_Init(SDL_INIT_CAMERA) < 0) {
+	if (!SDL_Init(SDL_INIT_CAMERA)) {
 		std::cerr << "SDL_Init CAMERA failed (" << SDL_GetError() << ")\n";
 	} else if (false) { // HACK
 		std::cerr << "CAMERA initialized\n";
 		SDLVideoCameraContent vcc;
-		auto* reader = vcc.aquireSubStream();
+		auto reader = vcc.subscribe();
 		for (size_t i = 0; i < 20; i++) {
 			std::this_thread::sleep_for(std::chrono::milliseconds(50));
 			auto new_frame_opt = reader->pop();
@@ -111,7 +111,7 @@ int main(int argc, char** argv) {
 				std::cout << "video frame was " << new_frame_opt.value().surface->w << "x" << new_frame_opt.value().surface->h << " " << new_frame_opt.value().timestampNS << "ns " << new_frame_opt.value().surface->format << "sf\n";
 			}
 		}
-		vcc.releaseSubStream(reader);
+		vcc.unsubscribe(reader);
 	}
 	std::cout << "after sdl video stuffery\n";
 

src/main_screen.cpp

@@ -9,6 +9,11 @@
 
 #include <SDL3/SDL.h>
 
+#include "./content/sdl_video_frame_stream2.hpp"
+#include "content/audio_stream.hpp"
+#include "content/sdl_audio_frame_stream2.hpp"
+#include "stream_manager.hpp"
+
 #include <memory>
 #include <cmath>
 #include <string_view>
@@ -19,11 +24,13 @@ MainScreen::MainScreen(SimpleConfigModel&& conf_, SDL_Renderer* renderer_, Theme
 	rmm(cr),
 	msnj{cr, {}, {}},
 	mts(rmm),
+	sm(os),
 	tc(save_path, save_password),
 	tpi(tc.getTox()),
 	ad(tc),
 #if TOMATO_TOX_AV
 	tav(tc.getTox()),
+	dtc(os, tav, sdlrtu),
 #endif
 	tcm(cr, tc, tc),
 	tmm(rmm, cr, tcm, tc, tc),
@@ -40,6 +47,8 @@ MainScreen::MainScreen(SimpleConfigModel&& conf_, SDL_Renderer* renderer_, Theme
 	cg(conf, os, rmm, cr, sdlrtu, contact_tc, msg_tc, theme),
 	sw(conf),
 	osui(os),
+	smui(os, sm),
+	dvt(os, sm, sdlrtu),
 	tuiu(tc, conf),
 	tdch(tpi)
 {
@@ -136,6 +145,43 @@ MainScreen::MainScreen(SimpleConfigModel&& conf_, SDL_Renderer* renderer_, Theme
 	}
 
 	conf.dump();
+
+	{ // add system av devices
+		{
+			ObjectHandle vsrc {os.registry(), os.registry().create()};
+			try {
+				vsrc.emplace<Components::FrameStream2Source<SDLVideoFrame>>(
+					std::make_unique<SDLVideoCameraContent>()
+				);
+
+				vsrc.emplace<Components::StreamSource>("WebCam", std::string{entt::type_name<SDLVideoFrame>::value()});
+			} catch (...) {
+				os.registry().destroy(vsrc);
+			}
+		}
+
+		{ // audio in
+			ObjectHandle asrc {os.registry(), os.registry().create()};
+			try {
+				throw int(2);
+			} catch (...) {
+				os.registry().destroy(asrc);
+			}
+		}
+
+		{ // audio out
+			ObjectHandle asink {os.registry(), os.registry().create()};
+			try {
+				asink.emplace<Components::FrameStream2Sink<AudioFrame>>(
+					std::make_unique<SDLAudioOutputDeviceDefaultSink>()
+				);
+
+				asink.emplace<Components::StreamSink>("LoudSpeaker", std::string{entt::type_name<AudioFrame>::value()});
+			} catch (...) {
+				os.registry().destroy(asink);
+			}
+		}
+	}
 }
 
 MainScreen::~MainScreen(void) {
@@ -252,14 +298,19 @@ Screen* MainScreen::render(float time_delta, bool&) {
 	}
 	// ACTUALLY NOT IF RENDERED, MOVED LOGIC TO ABOVE
 	// it might unload textures, so it needs to be done before rendering
-	const float ctc_interval = contact_tc.update();
+	float animation_interval = contact_tc.update();
-	const float msgtc_interval = msg_tc.update();
+	animation_interval = std::min<float>(animation_interval, msg_tc.update());
 
 	const float cg_interval = cg.render(time_delta); // render
 	sw.render(); // render
 	osui.render();
+	smui.render();
+	animation_interval = std::min<float>(animation_interval, dvt.render());
 	tuiu.render(); // render
 	tdch.render(); // render
+#if TOMATO_TOX_AV
+	animation_interval = std::min<float>(animation_interval, dtc.render());
+#endif
 
 	{ // main window menubar injection
 		if (ImGui::Begin("tomato")) {
@@ -440,8 +491,7 @@ Screen* MainScreen::render(float time_delta, bool&) {
 
 	// low delay time window
 	if (!_window_hidden && _time_since_event < curr_profile.low_delay_window) {
-		_render_interval = std::min<float>(_render_interval, ctc_interval);
+		_render_interval = std::min<float>(_render_interval, animation_interval);
-		_render_interval = std::min<float>(_render_interval, msgtc_interval);
 
 		_render_interval = std::clamp(
 			_render_interval,
@@ -450,8 +500,7 @@ Screen* MainScreen::render(float time_delta, bool&) {
 		);
 	// mid delay time window
 	} else if (!_window_hidden && _time_since_event < curr_profile.mid_delay_window) {
-		_render_interval = std::min<float>(_render_interval, ctc_interval);
+		_render_interval = std::min<float>(_render_interval, animation_interval);
-		_render_interval = std::min<float>(_render_interval, msgtc_interval);
 
 		_render_interval = std::clamp(
 			_render_interval,
@@ -479,10 +528,13 @@ Screen* MainScreen::tick(float time_delta, bool& quit) {
 #if TOMATO_TOX_AV
 	tav.toxavIterate();
 	const float av_interval = tav.toxavIterationInterval()/1000.f;
+	dtc.tick(time_delta);
 #endif
 
 	tcm.iterate(time_delta); // compute
 
+	const float sm_interval = sm.tick(time_delta);
+
 	const float fo_interval = tffom.tick(time_delta);
 
 	tam.iterate(); // compute
@@ -522,6 +574,11 @@ Screen* MainScreen::tick(float time_delta, bool& quit) {
 	);
 #endif
 
+	_min_tick_interval = std::min<float>(
+		_min_tick_interval,
+		sm_interval
+	);
+
 	//std::cout << "MS: min tick interval: " << _min_tick_interval << "\n";
 
 	switch (_compute_perf_mode) {

src/main_screen.hpp

@@ -16,6 +16,8 @@
 #include <solanaceae/tox_messages/tox_message_manager.hpp>
 #include <solanaceae/tox_messages/tox_transfer_manager.hpp>
 
+#include "./stream_manager.hpp"
+
 #include "./tox_client.hpp"
 #include "./auto_dirty.hpp"
 
@@ -30,12 +32,15 @@
 #include "./chat_gui4.hpp"
 #include "./chat_gui/settings_window.hpp"
 #include "./object_store_ui.hpp"
+#include "./stream_manager_ui.hpp"
+#include "./debug_video_tap.hpp"
 #include "./tox_ui_utils.hpp"
 #include "./tox_dht_cap_histo.hpp"
 #include "./tox_friend_faux_offline_messaging.hpp"
 
 #if TOMATO_TOX_AV
 #include "./tox_av.hpp"
+#include "./debug_tox_call.hpp"
 #endif
 
 #include <string>
@@ -58,12 +63,15 @@ struct MainScreen final : public Screen {
 	MessageSerializerNJ msnj;
 	MessageTimeSort mts;
 
+	StreamManager sm;
+
 	ToxEventLogger tel{std::cout};
 	ToxClient tc;
 	ToxPrivateImpl tpi;
 	AutoDirty ad;
 #if TOMATO_TOX_AV
 	ToxAV tav;
+	DebugToxCall dtc;
 #endif
 	ToxContactModel2 tcm;
 	ToxMessageManager tmm;
@@ -86,6 +94,8 @@ struct MainScreen final : public Screen {
 	ChatGui4 cg;
 	SettingsWindow sw;
 	ObjectStoreUI osui;
+	StreamManagerUI smui;
+	DebugVideoTap dvt;
 	ToxUIUtils tuiu;
 	ToxDHTCapHisto tdch;
 

src/sdlrenderer_texture_uploader.cpp

@@ -32,7 +32,7 @@ uint64_t SDLRendererTextureUploader::uploadRGBA(const uint8_t* data, uint32_t wi
 	SDL_UpdateTexture(tex, nullptr, surf->pixels, surf->pitch);
 
 	SDL_BlendMode surf_blend_mode = SDL_BLENDMODE_NONE;
-	if (SDL_GetSurfaceBlendMode(surf, &surf_blend_mode) == 0) {
+	if (SDL_GetSurfaceBlendMode(surf, &surf_blend_mode)) {
 		SDL_SetTextureBlendMode(tex, surf_blend_mode);
 	}
 

src/stream_manager.hpp

@@ -0,0 +1,210 @@
+#pragma once
+
+#include <solanaceae/object_store/fwd.hpp>
+#include <solanaceae/object_store/object_store.hpp>
+
+#include <entt/core/type_info.hpp>
+
+#include "./content/frame_stream2.hpp"
+
+#include <vector>
+#include <memory>
+#include <algorithm>
+
+namespace Components {
+	struct StreamSource {
+		std::string name;
+		std::string frame_type_name;
+		// TODO: connect fn
+	};
+
+	struct StreamSink {
+		std::string name;
+		std::string frame_type_name;
+		// TODO: connect fn
+	};
+
+	template<typename FrameType>
+	using FrameStream2Source = std::unique_ptr<FrameStream2SourceI<FrameType>>;
+
+	template<typename FrameType>
+	using FrameStream2Sink = std::unique_ptr<FrameStream2SinkI<FrameType>>;
+
+} // Components
+
+
+class StreamManager {
+	friend class StreamManagerUI;
+	ObjectStore2& _os;
+
+	struct Connection {
+		ObjectHandle src;
+		ObjectHandle sink;
+
+		std::function<void(Connection&)> pump_fn;
+
+		bool on_main_thread {true};
+		std::atomic_bool stop {false}; // disconnect
+		std::atomic_bool finished {false}; // disconnect
+
+		// pump thread
+
+		// frame interval counters and estimates
+
+		Connection(void) = default;
+		Connection(
+			ObjectHandle src_,
+			ObjectHandle sink_,
+			std::function<void(Connection&)>&& pump_fn_,
+			bool on_main_thread_ = true
+		) :
+			src(src_),
+			sink(sink_),
+			pump_fn(std::move(pump_fn_)),
+			on_main_thread(on_main_thread_)
+		{}
+	};
+	std::vector<std::unique_ptr<Connection>> _connections;
+
+	public:
+		StreamManager(ObjectStore2& os) : _os(os) {}
+		virtual ~StreamManager(void) {}
+
+		// TODO: default typed sources and sinks
+
+		// stream type is FrameStream2I<FrameType>
+		// TODO: improve this design
+		// src and sink need to be a FrameStream2MultiStream<FrameType>
+		template<typename FrameType>
+		bool connect(Object src, Object sink) {
+			auto res = std::find_if(
+				_connections.cbegin(), _connections.cend(),
+				[&](const auto& a) { return a->src == src && a->sink == sink; }
+			);
+			if (res != _connections.cend()) {
+				// already exists
+				return false;
+			}
+
+			auto h_src = _os.objectHandle(src);
+			auto h_sink = _os.objectHandle(sink);
+			if (!static_cast<bool>(h_src) || !static_cast<bool>(h_sink)) {
+				// an object does not exist
+				return false;
+			}
+
+			if (!h_src.all_of<Components::FrameStream2Source<FrameType>>()) {
+				// src not stream source
+				return false;
+			}
+
+			if (!h_sink.all_of<Components::FrameStream2Sink<FrameType>>()) {
+				// sink not stream sink
+				return false;
+			}
+
+			// HACK:
+			if (!h_src.all_of<Components::StreamSource>()) {
+				h_src.emplace<Components::StreamSource>("", std::string{entt::type_name<FrameType>::value()});
+			}
+			if (!h_sink.all_of<Components::StreamSink>()) {
+				h_sink.emplace<Components::StreamSink>("", std::string{entt::type_name<FrameType>::value()});
+			}
+
+			auto& src_stream = h_src.get<Components::FrameStream2Source<FrameType>>();
+			auto& sink_stream = h_sink.get<Components::FrameStream2Sink<FrameType>>();
+
+			auto reader = src_stream->subscribe();
+			if (!reader) {
+				return false;
+			}
+			auto writer = sink_stream->subscribe();
+			if (!writer) {
+				return false;
+			}
+
+			_connections.push_back(std::make_unique<Connection>(
+				h_src,
+				h_sink,
+				// refactor extract, we just need the type info here
+				[reader = std::move(reader), writer = std::move(writer)](Connection& con) -> void {
+					// there might be more stored
+					for (size_t i = 0; i < 10; i++) {
+						auto new_frame_opt = reader->pop();
+						// TODO: frame interval estimates
+						if (new_frame_opt.has_value()) {
+							writer->push(new_frame_opt.value());
+						} else {
+							break;
+						}
+					}
+
+					if (con.stop) {
+						auto* src_stream_ptr = con.src.try_get<Components::FrameStream2Source<FrameType>>();
+						if (src_stream_ptr != nullptr) {
+							(*src_stream_ptr)->unsubscribe(reader);
+						}
+						auto* sink_stream_ptr = con.sink.try_get<Components::FrameStream2Sink<FrameType>>();
+						if (sink_stream_ptr != nullptr) {
+							(*sink_stream_ptr)->unsubscribe(writer);
+						}
+						con.finished = true;
+					}
+				},
+				true // TODO: threaded
+			));
+
+			return true;
+		}
+
+		template<typename StreamType>
+		bool disconnect(Object src, Object sink) {
+			auto res = std::find_if(
+				_connections.cbegin(), _connections.cend(),
+				[&](const auto& a) { return a->src == src && a->sink == sink; }
+			);
+			if (res == _connections.cend()) {
+				// not found
+				return false;
+			}
+
+			// do disconnect
+			(*res)->stop = true;
+
+			return true;
+		}
+
+		template<typename StreamType>
+		bool disconnectAll(Object o) {
+			bool succ {false};
+			for (const auto& con : _connections) {
+				if (con->src == o || con->sink == o) {
+					con->stop = true;
+					succ = true;
+				}
+			}
+
+			return succ;
+		}
+
+		// do we need the time delta?
+		float tick(float) {
+			// pump all mainthread connections
+			for (auto it = _connections.begin(); it != _connections.end();) {
+				auto& con = **it;
+				if (con.on_main_thread) {
+					con.pump_fn(con);
+				}
+
+				if (con.stop && con.finished) {
+					it = _connections.erase(it);
+				} else {
+					it++;
+				}
+			}
+
+			// return min over intervals instead
+			return 0.01f;
+		}
+};
+

src/stream_manager_ui.cpp

@@ -0,0 +1,39 @@
+#include "./stream_manager_ui.hpp"
+
+#include <solanaceae/object_store/object_store.hpp>
+
+#include <imgui/imgui.h>
+
+StreamManagerUI::StreamManagerUI(ObjectStore2& os, StreamManager& sm) : _os(os), _sm(sm) {
+}
+
+void StreamManagerUI::render(void) {
+	if (ImGui::Begin("StreamManagerUI")) {
+		// TODO: node canvas?
+
+		// by fametype ??
+
+		ImGui::SeparatorText("Sources");
+
+		// list sources
+		for (const auto& [oc, ss] : _os.registry().view<Components::StreamSource>().each()) {
+			ImGui::Text("src  %d (%s)[%s]", entt::to_integral(oc), ss.name.c_str(), ss.frame_type_name.c_str());
+		}
+
+		ImGui::SeparatorText("Sinks");
+
+		// list sinks
+		for (const auto& [oc, ss] : _os.registry().view<Components::StreamSink>().each()) {
+			ImGui::Text("sink %d (%s)[%s]", entt::to_integral(oc), ss.name.c_str(), ss.frame_type_name.c_str());
+		}
+
+		ImGui::SeparatorText("Connections");
+
+		// list connections
+		for (const auto& con : _sm._connections) {
+			ImGui::Text("con %d->%d", entt::to_integral(con->src.entity()), entt::to_integral(con->sink.entity()));
+		}
+	}
+	ImGui::End();
+}
+

src/stream_manager_ui.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <solanaceae/object_store/fwd.hpp>
+#include "./stream_manager.hpp"
+
+class StreamManagerUI {
+	ObjectStore2& _os;
+	StreamManager& _sm;
+
+	public:
+		StreamManagerUI(ObjectStore2& os, StreamManager& sm);
+
+		void render(void);
+};
+

src/tox_av.cpp

@@ -153,11 +153,11 @@ Toxav_Err_Bit_Rate_Set ToxAV::toxavVideoSetBitRate(uint32_t friend_number, uint3
 
 void ToxAV::cb_call(uint32_t friend_number, bool audio_enabled, bool video_enabled) {
 	std::cerr << "TOXAV: receiving call f:" << friend_number << " a:" << audio_enabled << " v:" << video_enabled << "\n";
-	Toxav_Err_Answer err_answer { TOXAV_ERR_ANSWER_OK };
+	//Toxav_Err_Answer err_answer { TOXAV_ERR_ANSWER_OK };
-	toxav_answer(_tox_av, friend_number, 0, 0, &err_answer);
+	//toxav_answer(_tox_av, friend_number, 0, 0, &err_answer);
-	if (err_answer != TOXAV_ERR_ANSWER_OK) {
+	//if (err_answer != TOXAV_ERR_ANSWER_OK) {
-		std::cerr << "!!!!!!!! answer failed " << err_answer << "\n";
+	//    std::cerr << "!!!!!!!! answer failed " << err_answer << "\n";
-	}
+	//}
 
 	dispatch(
 		ToxAV_Event::friend_call,

src/tox_av.hpp

@@ -68,7 +68,7 @@ enum class ToxAV_Event : uint32_t {
 	MAX
 };
 
-struct ToxAVEventI  {
+struct ToxAVEventI {
 	using enumType = ToxAV_Event;
 
 	virtual ~ToxAVEventI(void) {}