explicit image_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename)
: filename_(filename)
, frame_(core::basic_frame::empty())
{
auto bitmap = load_image(filename_);
FreeImage_FlipVertical(bitmap.get());
core::pixel_format_desc desc;
desc.pix_fmt = core::pixel_format::bgra;
desc.planes.push_back(core::pixel_format_desc::plane(FreeImage_GetWidth(bitmap.get()), FreeImage_GetHeight(bitmap.get()), 4));
auto frame = frame_factory->create_frame(this, desc);
std::copy_n(FreeImage_GetBits(bitmap.get()), frame->image_data().size(), frame->image_data().begin());
frame->commit();
frame_ = std::move(frame);
}
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);
}