X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=core%2Fmixer%2Fimage%2Fimage_mixer.cpp;h=c01e801b9833f1a022ad2869bdb5fa5900715b9a;hb=06fe3a65d33c88522556f7a36ac2951d62ddf31e;hp=7abac7769c790b88413d443b019a0e0a2850429e;hpb=890bdc2d683e293ee744dc062a5ecb10c445e34d;p=casparcg

diff --git a/core/mixer/image/image_mixer.cpp b/core/mixer/image/image_mixer.cpp
index 7abac7769..c01e801b9 100644
--- a/core/mixer/image/image_mixer.cpp
+++ b/core/mixer/image/image_mixer.cpp
@@ -37,215 +37,240 @@
 #include <core/producer/frame/pixel_format.h>
 #include <core/video_format.h>
 
+#include <gl/glew.h>
+
 #include <boost/foreach.hpp>
+#include <boost/range.hpp>
+#include <boost/range/algorithm/find.hpp>
 
+#include <algorithm>
 #include <array>
+#include <deque>
 #include <unordered_map>
 
 namespace caspar { namespace core {
 		
 struct image_mixer::implementation : boost::noncopyable
-{	
-	static const size_t LOCAL_KEY_INDEX = 3;
-	static const size_t LAYER_KEY_INDEX = 4;
-
-	struct render_item
-	{
-		pixel_format_desc					 desc;
-		std::vector<safe_ptr<device_buffer>> textures;
-		int									 tag;
-		core::image_transform				 transform;
-	};
+{		
+	typedef std::deque<render_item>			layer;
 
 	video_channel_context&					channel_;
-	
-	std::stack<core::image_transform>		transform_stack_;
-	std::queue<std::queue<render_item>>		render_queue_;
-	
-	image_kernel							kernel_;
-		
-	safe_ptr<host_buffer>					read_buffer_;
-	safe_ptr<device_buffer>					draw_buffer_;
-	safe_ptr<device_buffer>					write_buffer_;
 
-	safe_ptr<device_buffer>					local_key_buffer_;
-	safe_ptr<device_buffer>					layer_key_buffer_;
+	std::vector<image_transform>			transform_stack_;
+	std::vector<video_mode::type>			mode_stack_;
 
-	bool									local_key_;
-	bool									layer_key_;
+	std::deque<std::deque<render_item>>		layers_; // layer/stream/items
 	
+	image_kernel							kernel_;		
+
+	std::shared_ptr<device_buffer>			active_buffer_;
 public:
 	implementation(video_channel_context& video_channel) 
 		: channel_(video_channel)
-		, read_buffer_(video_channel.ogl().create_host_buffer(video_channel.get_format_desc().size, host_buffer::read_only))
-		, draw_buffer_(video_channel.ogl().create_device_buffer(video_channel.get_format_desc().width, channel_.get_format_desc().height, 4))
-		, write_buffer_	(video_channel.ogl().create_device_buffer(video_channel.get_format_desc().width, channel_.get_format_desc().height, 4))
-		, local_key_buffer_(video_channel.ogl().create_device_buffer(video_channel.get_format_desc().width, channel_.get_format_desc().height, 1))
-		, layer_key_buffer_(video_channel.ogl().create_device_buffer(video_channel.get_format_desc().width, channel_.get_format_desc().height, 1))
-		, local_key_(false)
-		, layer_key_(false)
+		, transform_stack_(1)
+		, mode_stack_(1, video_mode::progressive)
 	{
-		transform_stack_.push(core::image_transform());
-
-		channel_.ogl().invoke([=]
-		{
-			if(!GLEE_VERSION_3_0)
-				CASPAR_LOG(warning) << "Missing OpenGL 3.0 support.";//BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 3.0 support."));
-		});
 	}
 
+	~implementation()
+	{
+		channel_.ogl().gc();
+	}
+	
 	void begin(core::basic_frame& frame)
 	{
-		transform_stack_.push(transform_stack_.top()*frame.get_image_transform());
+		transform_stack_.push_back(transform_stack_.back()*frame.get_image_transform());
+		mode_stack_.push_back(frame.get_mode() == video_mode::progressive ? mode_stack_.back() : frame.get_mode());
 	}
 		
 	void visit(core::write_frame& frame)
-	{			
-		render_item item = {frame.get_pixel_format_desc(), frame.get_textures(), frame.tag(), transform_stack_.top()*frame.get_image_transform()};	
-		render_queue_.back().push(item);
+	{	
+		CASPAR_ASSERT(!layers_.empty());
+
+		// Check if frame has been discarded by interlacing
+		if(boost::range::find(mode_stack_, video_mode::upper) != mode_stack_.end() && boost::range::find(mode_stack_, video_mode::lower) != mode_stack_.end())
+			return;
+		
+		core::render_item item(frame.get_pixel_format_desc(), frame.get_textures(), transform_stack_.back(), mode_stack_.back(), frame.tag());	
+
+		auto& layer = layers_.back();
+
+		if(boost::range::find(layer, item) == layer.end())
+			layer.push_back(item);
 	}
 
 	void end()
 	{
-		transform_stack_.pop();
+		transform_stack_.pop_back();
+		mode_stack_.pop_back();
 	}
 
 	void begin_layer()
 	{
-		render_queue_.push(std::queue<render_item>());
+		layers_.push_back(layer());
 	}
 
 	void end_layer()
 	{
 	}
-
-	void reinitialize_buffers()
-	{
-		read_buffer_	  = channel_.ogl().create_host_buffer(channel_.get_format_desc().size, host_buffer::read_only);
-		draw_buffer_	  = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 4);
-		write_buffer_	  = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 4);
-		local_key_buffer_ = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 1);
-		layer_key_buffer_ = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 1);
-		channel_.ogl().gc();
-	}
-
-	safe_ptr<host_buffer> render()
+	
+	boost::unique_future<safe_ptr<host_buffer>> render()
 	{		
-		auto read_buffer = read_buffer_;
-		auto result = channel_.ogl().begin_invoke([=]()  -> safe_ptr<host_buffer>
+		auto layers = std::move(layers_);
+		return channel_.ogl().begin_invoke([=]() mutable
 		{
-			read_buffer->map();
-			return read_buffer;
+			return render(std::move(layers));
 		});
+	}
+	
+	safe_ptr<host_buffer> render(std::deque<layer>&& layers)
+	{
+		std::shared_ptr<device_buffer> layer_key_buffer;
 
-		auto render_queue = std::move(render_queue_);
-
-		channel_.ogl().begin_invoke([=]() mutable
-		{
-			if(draw_buffer_->width() != channel_.get_format_desc().width || draw_buffer_->height() != channel_.get_format_desc().height)
-				reinitialize_buffers();
+		auto draw_buffer = create_device_buffer(4);
+				
+		BOOST_FOREACH(auto& layer, layers)
+			draw(std::move(layer), draw_buffer, layer_key_buffer);
+		
+		auto host_buffer = channel_.ogl().create_host_buffer(channel_.get_format_desc().size, host_buffer::read_only);
+		channel_.ogl().attach(*draw_buffer);
+		host_buffer->begin_read(draw_buffer->width(), draw_buffer->height(), format(draw_buffer->stride()));
+		
+		active_buffer_ = draw_buffer;
 
-			local_key_ = false;
-			layer_key_ = false;
+		channel_.ogl().flush(); // NOTE: This is important, otherwise fences will deadlock.
+			
+		return host_buffer;
+	}
 
-			// Clear buffers.
-			local_key_buffer_->clear();
-			layer_key_buffer_->clear();
-			draw_buffer_->clear();
+	// TODO: We might have more overlaps for opacity transitions
+	// TODO: What about blending modes, are they ok? Maybe only overlap detection is required for opacity?
+	void draw(layer&& layer, const safe_ptr<device_buffer>& draw_buffer, std::shared_ptr<device_buffer>& layer_key_buffer)
+	{				
+		if(layer.empty())
+			return;
 
-			// Draw items in device.
+		std::pair<int, std::shared_ptr<device_buffer>> local_key_buffer;
+					
+		if(has_overlapping_items(layer, layer.front().transform.get_blend_mode()))
+		{
+			auto local_draw_buffer = create_device_buffer(4);	
 
-			while(!render_queue.empty())
+			int mode = 0;
+			BOOST_FOREACH(auto& item, layer)
 			{
-				auto layer = render_queue.front();
-				render_queue.pop();
-				
-				draw_buffer_->attach();	
-				
-				while(!layer.empty())
+				if(mode & item.mode)
+					item.transform.set_blend_mode(image_transform::blend_mode::normal); // Disable blending, it will be used when merging back into render stack.
+				else
 				{
-					// Split layer into streams
-					std::vector<render_item> stream;
-					do
-					{
-						stream.push_back(layer.front());
-						layer.pop();
-					}
-					while(!layer.empty() && layer.front().tag == stream.front().tag);
-
-					draw(stream);
-
-					channel_.ogl().yield(); // Allow quick buffer allocation to execute.
+					item.transform.set_blend_mode(image_transform::blend_mode::replace); // Target field is empty, no blending
+					mode |= item.mode;
 				}
 
-				layer_key_ = local_key_; // If there was only key in last layer then use it as key for the entire next layer.
-				local_key_ = false;
-
-				std::swap(local_key_buffer_, layer_key_buffer_);
+				draw_item(std::move(item), local_draw_buffer, local_key_buffer, layer_key_buffer);		
 			}
 
-			std::swap(draw_buffer_, write_buffer_);
+			kernel_.draw(channel_.ogl(), create_render_item(local_draw_buffer, layer.front().transform.get_blend_mode()), draw_buffer, nullptr, nullptr);
+		}
+		else // fast path
+		{
+			BOOST_FOREACH(auto& item, layer)		
+				draw_item(std::move(item), draw_buffer, local_key_buffer, layer_key_buffer);		
+		}					
 
-			// Start transfer from device to host.	
-			read_buffer_ = channel_.ogl().create_host_buffer(channel_.get_format_desc().size, host_buffer::read_only);					
-			write_buffer_->write(*read_buffer_);
-		});
+		CASPAR_ASSERT(local_key_buffer.first == 0 || local_key_buffer.first == core::video_mode::progressive);
 
-		return std::move(result.get());
+		std::swap(local_key_buffer.second, layer_key_buffer);
 	}
-	
-	void draw(const std::vector<render_item>& stream)
-	{	
-		if(stream.empty())
-			return;				
-		
-		BOOST_FOREACH(auto item, stream)
-		{
-			bool local_key = false;
-			bool layer_key = false;
 
-			// Setup key and kernel
-					
-			if(item.transform.get_is_key()) // This is a key frame, render it to the local_key buffer for later use.
+	void draw_item(render_item&&									item, 
+				   const safe_ptr<device_buffer>&					draw_buffer, 
+				   std::pair<int, std::shared_ptr<device_buffer>>&	local_key_buffer, 
+				   std::shared_ptr<device_buffer>&					layer_key_buffer)
+	{											
+		if(item.transform.get_is_key())
+		{
+			if(!local_key_buffer.second)
 			{
-				if(!local_key_) // Initialize local-key if it is not active.
-				{
-					local_key_buffer_->clear();
-					local_key_buffer_->attach();
-					local_key_ = true;
-				}
-			}		
-			else // This is a normal frame. Use key buffers if they are active.
-			{		
-				local_key = local_key_;
-				layer_key = layer_key_;
+				local_key_buffer.first = 0;
+				local_key_buffer.second = create_device_buffer(1);
+			}
 
-				if(local_key_) // Use local key if we have it.
-				{
-					local_key_buffer_->bind(LOCAL_KEY_INDEX);
-					draw_buffer_->attach();	
-				}		
+			// No transparency for key
+			item.transform.set_opacity(1.0);
+			item.transform.set_blend_mode(image_transform::blend_mode::normal);
 
-				if(layer_key_) // Use layer key if we have it.
-					layer_key_buffer_->bind(LAYER_KEY_INDEX);
-			}	
+			local_key_buffer.first |= item.mode;
+			kernel_.draw(channel_.ogl(), std::move(item), make_safe(local_key_buffer.second), nullptr, nullptr);
+		}
+		else
+		{
+			kernel_.draw(channel_.ogl(), std::move(item), draw_buffer, local_key_buffer.second, layer_key_buffer);
+			local_key_buffer.first ^= item.mode;
+			
+			if(local_key_buffer.first == 0)
+			{
+				local_key_buffer.first = 0;
+				local_key_buffer.second.reset();
+			}
+		}
+	}
 
-			// Bind textures
+	// TODO: Optimize
+	bool has_overlapping_items(const layer& layer, image_transform::blend_mode::type blend_mode)
+	{
+		if(layer.size() < 2)
+			return false;	
+		
+		implementation::layer fill;
 
-			for(size_t n = 0; n < item.textures.size(); ++n)
-				item.textures[n]->bind(n);		
+		std::copy_if(layer.begin(), layer.end(), std::back_inserter(fill), [&](const render_item& item)
+		{
+			return !item.transform.get_is_key();
+		});
 			
-			// Draw
-
-			kernel_.draw(channel_.get_format_desc().width, channel_.get_format_desc().height, item.desc, item.transform, local_key, layer_key);	
+		if(blend_mode == image_transform::blend_mode::normal) // Only overlap if opacity
+		{
+			return std::any_of(fill.begin(), fill.end(), [&](const render_item& item)
+			{
+				return item.transform.get_opacity() < 1.0 - 0.001;
+			});
 		}
 
-		local_key_ = stream.back().transform.get_is_key(); // Keep for next layer if last frame is key
-	}
+		// Simple solution, just check if we have differnt video streams / tags.
+		return std::any_of(fill.begin(), fill.end(), [&](const render_item& item)
+		{
+			return item.tag != fill.front().tag;
+		});
+	}			
 			
+	render_item create_render_item(const safe_ptr<device_buffer>& buffer, image_transform::blend_mode::type blend_mode)
+	{
+		CASPAR_ASSERT(buffer->stride() == 4 && "Only used for bgra textures");
+
+		pixel_format_desc desc;
+		desc.pix_fmt = pixel_format::bgra;
+		desc.planes.push_back(pixel_format_desc::plane(channel_.get_format_desc().width, channel_.get_format_desc().height, 4));
+
+		std::vector<safe_ptr<device_buffer>> textures;
+		textures.push_back(buffer);
+				
+		image_transform transform;
+		transform.set_blend_mode(blend_mode);
+
+		return render_item(desc, std::move(textures), transform, video_mode::progressive, nullptr);		 
+	}
+
+	safe_ptr<device_buffer> create_device_buffer(size_t stride)
+	{
+		auto buffer = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, stride);
+		channel_.ogl().clear(*buffer);
+		return buffer;
+	}
+
 	safe_ptr<write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)
 	{
-		return make_safe<write_frame>(channel_.ogl(), reinterpret_cast<int>(tag), desc);
+		return make_safe<write_frame>(channel_.ogl(), tag, desc);
 	}
 };
 
@@ -253,7 +278,7 @@ image_mixer::image_mixer(video_channel_context& video_channel) : impl_(new imple
 void image_mixer::begin(core::basic_frame& frame){impl_->begin(frame);}
 void image_mixer::visit(core::write_frame& frame){impl_->visit(frame);}
 void image_mixer::end(){impl_->end();}
-safe_ptr<host_buffer> image_mixer::render(){return impl_->render();}
+boost::unique_future<safe_ptr<host_buffer>> image_mixer::render(){return impl_->render();}
 safe_ptr<write_frame> image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){return impl_->create_frame(tag, desc);}
 void image_mixer::begin_layer(){impl_->begin_layer();}
 void image_mixer::end_layer(){impl_->end_layer();}