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<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int hints)
{
auto frame = producer->receive(hints);
if(frame == basic_frame::eof())
{
CASPAR_LOG(info) << producer->print() << " End Of File.";
auto following = producer->get_following_producer();
if(following != frame_producer::empty())
{
following->set_leading_producer(producer);
producer = std::move(following);
}
else
producer = make_safe<last_frame_producer>(producer);
return receive_and_follow(producer, hints);
}
return frame;
}
safe_ptr<basic_frame> receive(int hints)
{
try
{
monitor_subject_ << monitor::message("/paused") % is_paused_;
if(is_paused_)
{
if(foreground_->last_frame() == basic_frame::empty())
foreground_->receive(frame_producer::NO_HINT);
return disable_audio(foreground_->last_frame());
}
auto foreground = foreground_;
auto frame = receive_and_follow(foreground, hints);
if(foreground != foreground_)
set_foreground(foreground);
if(frame == core::basic_frame::late())
return foreground_->last_frame();
auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);
if(auto_play_delta_ > -1 && frames_left < 1)
{
play();
return receive(hints);
}
return frame;
}
catch(...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
stop();
return core::basic_frame::empty();
}
}
