virtual boost::unique_future<bool> send(const safe_ptr<core::read_frame>& frame) override
	{
		CASPAR_VERIFY(format_desc_.height * format_desc_.width * 4 == static_cast<unsigned>(frame->image_data().size()));

		return executor_.begin_invoke([=]() -> bool
		{			
			graph_->set_value("tick-time", tick_timer_.elapsed() * format_desc_.fps * 0.5);
			tick_timer_.restart();
			frame_timer_.restart();

			// AUDIO

			std::vector<int16_t, tbb::cache_aligned_allocator<int16_t>> audio_buffer;

			if (core::needs_rearranging(
					frame->multichannel_view(),
					channel_layout_,
					channel_layout_.num_channels))
			{
				core::audio_buffer downmixed;

				downmixed.resize(
						frame->multichannel_view().num_samples() 
								* channel_layout_.num_channels,
						0);

				auto dest_view = core::make_multichannel_view<int32_t>(
						downmixed.begin(), downmixed.end(), channel_layout_);

				core::rearrange_or_rearrange_and_mix(
						frame->multichannel_view(),
						dest_view,
						core::default_mix_config_repository());

				audio_buffer = core::audio_32_to_16(downmixed);
			}
			else
			{
				audio_buffer = core::audio_32_to_16(frame->audio_data());
			}

			airsend::add_audio(air_send_.get(), audio_buffer.data(), audio_buffer.size() / channel_layout_.num_channels);

			// VIDEO

			connected_ = airsend::add_frame_bgra(air_send_.get(), frame->image_data().begin());

			graph_->set_text(print());
			graph_->set_value("frame-time", frame_timer_.elapsed() * format_desc_.fps * 0.5);
			
			return true;
		});
	}
	virtual boost::unique_future<bool> send(const safe_ptr<core::read_frame>& frame) override
	{
		auto buffer = std::make_shared<audio_buffer_16>(
			core::audio_32_to_16(core::get_rearranged_and_mixed(frame->multichannel_view(), channel_layout_, channel_layout_.num_channels)));

		if (!input_.try_push(std::make_pair(frame, buffer)))
			graph_->set_tag("dropped-frame");

		if (Status() != Playing && !started_)
		{
			sf::SoundStream::Initialize(2, format_desc_.audio_sample_rate);
			Play();
			started_ = true;
		}

		return wrap_as_future(is_running_.load());
	}