Esempio n. 1
0
	safe_ptr<core::basic_frame> get_frame(int hints)
	{
		if(exception_ != nullptr)
			std::rethrow_exception(exception_);

		hints_ = hints;

		safe_ptr<core::basic_frame> frame = core::basic_frame::late();
		if(!frame_buffer_.try_pop(frame))
			graph_->set_tag("late-frame");
		graph_->set_value("output-buffer", static_cast<float>(frame_buffer_.size())/static_cast<float>(frame_buffer_.capacity()));	
		return frame;
	}
Esempio n. 2
0
	virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame* video, IDeckLinkAudioInputPacket* audio)
	{	
		if(!video)
			return S_OK;

		try
		{
			graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);
			tick_timer_.restart();

			frame_timer_.restart();

			// PUSH

			void* bytes = nullptr;
			if(FAILED(video->GetBytes(&bytes)) || !bytes)
				return S_OK;
			
			safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);	
			avcodec_get_frame_defaults(av_frame.get());
						
			av_frame->data[0]			= reinterpret_cast<uint8_t*>(bytes);
			av_frame->linesize[0]		= video->GetRowBytes();			
			av_frame->format			= PIX_FMT_UYVY422;
			av_frame->width				= video->GetWidth();
			av_frame->height			= video->GetHeight();
			av_frame->interlaced_frame	= format_desc_.field_mode != core::field_mode::progressive;
			av_frame->top_field_first	= format_desc_.field_mode == core::field_mode::upper ? 1 : 0;
				
			std::shared_ptr<core::audio_buffer> audio_buffer;

			// It is assumed that audio is always equal or ahead of video.
			if(audio && SUCCEEDED(audio->GetBytes(&bytes)) && bytes)
			{
				auto sample_frame_count = audio->GetSampleFrameCount();
				auto audio_data = reinterpret_cast<int32_t*>(bytes);
				audio_buffer = std::make_shared<core::audio_buffer>(audio_data, audio_data + sample_frame_count*format_desc_.audio_channels);
			}
			else			
				audio_buffer = std::make_shared<core::audio_buffer>(audio_cadence_.front(), 0);
			
			// Note: Uses 1 step rotated cadence for 1001 modes (1602, 1602, 1601, 1602, 1601)
			// This cadence fills the audio mixer most optimally.

			sync_buffer_.push_back(audio_buffer->size());		
			if(!boost::range::equal(sync_buffer_, audio_cadence_))
			{
				CASPAR_LOG(trace) << print() << L" Syncing audio.";
				return S_OK;
			}

			muxer_.push(audio_buffer);
			muxer_.push(av_frame, hints_);	
											
			boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);
			
			// POLL
			
			for(auto frame = muxer_.poll(); frame; frame = muxer_.poll())
			{
				if(!frame_buffer_.try_push(make_safe_ptr(frame)))
				{
					auto dummy = core::basic_frame::empty();
					frame_buffer_.try_pop(dummy);

					frame_buffer_.try_push(make_safe_ptr(frame));

					graph_->set_tag("dropped-frame");
				}
			}

			graph_->set_value("frame-time", frame_timer_.elapsed()*format_desc_.fps*0.5);

			graph_->set_value("output-buffer", static_cast<float>(frame_buffer_.size())/static_cast<float>(frame_buffer_.capacity()));	
		}
		catch(...)
		{
			exception_ = std::current_exception();
			return E_FAIL;
		}

		return S_OK;
	}