virtual safe_ptr<basic_frame> receive(int) override
{
auto format_desc = consumer_->get_video_format_desc();
if(frame_buffer_.size() > 0)
{
auto frame = frame_buffer_.front();
frame_buffer_.pop();
return last_frame_ = frame;
}
auto read_frame = consumer_->receive();
if(!read_frame || read_frame->image_data().empty())
return basic_frame::late();
frame_number_++;
core::pixel_format_desc desc;
bool double_speed = std::abs(frame_factory_->get_video_format_desc().fps / 2.0 - format_desc.fps) < 0.01;
bool half_speed = std::abs(format_desc.fps / 2.0 - frame_factory_->get_video_format_desc().fps) < 0.01;
if(half_speed && frame_number_ % 2 == 0) // Skip frame
return receive(0);
desc.pix_fmt = core::pixel_format::bgra;
desc.planes.push_back(core::pixel_format_desc::plane(format_desc.width, format_desc.height, 4));
auto frame = frame_factory_->create_frame(this, desc, read_frame->multichannel_view().channel_layout());
bool copy_audio = !double_speed && !half_speed;
if (copy_audio)
{
frame->audio_data().reserve(read_frame->audio_data().size());
boost::copy(read_frame->audio_data(), std::back_inserter(frame->audio_data()));
}
fast_memcpy(frame->image_data().begin(), read_frame->image_data().begin(), read_frame->image_data().size());
frame->commit();
frame_buffer_.push(frame);
if(double_speed)
frame_buffer_.push(frame);
return receive(0);
}
safe_ptr<core::frame_producer> create_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)
{
if(params.empty() || !boost::iequals(params[0], "decklink"))
return core::frame_producer::empty();
auto device_index = get_param(L"DEVICE", params, -1);
if(device_index == -1)
device_index = boost::lexical_cast<int>(params.at(1));
auto filter_str = get_param(L"FILTER", params);
auto length = get_param(L"LENGTH", params, std::numeric_limits<uint32_t>::max());
auto format_desc = core::video_format_desc::get(get_param(L"FORMAT", params, L"INVALID"));
boost::replace_all(filter_str, L"DEINTERLACE", L"YADIF=0:-1");
boost::replace_all(filter_str, L"DEINTERLACE_BOB", L"YADIF=1:-1");
if(format_desc.format == core::video_format::invalid)
format_desc = frame_factory->get_video_format_desc();
return create_producer_print_proxy(
create_producer_destroy_proxy(
make_safe<decklink_producer_proxy>(frame_factory, format_desc, device_index, filter_str, length)));
}
