Method FrameMapper

src/FrameMapper.cpp:27–55

using namespace openshot;

FrameMapper::FrameMapper(ReaderBase *reader, Fraction target, PulldownType target_pulldown, int target_sample_rate, int target_channels, ChannelLayout target_channel_layout) :
		reader(reader), target(target), pulldown(target_pulldown), is_dirty(true), avr(NULL), parent_position(0.0), parent_start(0.0), previous_frame(0)
{
	// Set the original frame rate from the reader
	original = Fraction(reader->info.fps.num, reader->info.fps.den);

	// Set all info struct members equal to the internal reader
	info = reader->info;
	info.fps.num = target.num;
	info.fps.den = target.den;
	info.video_timebase.num = target.den;
	info.video_timebase.den = target.num;
	info.video_length = round(info.duration * info.fps.ToDouble());
	info.sample_rate = target_sample_rate;
	info.channels = target_channels;
	info.channel_layout = target_channel_layout;
	info.width = reader->info.width;
	info.height = reader->info.height;

	// Enable/Disable audio (based on settings)
	info.has_audio = info.sample_rate > 0 && info.channels > 0;

	// Used to toggle odd / even fields
	field_toggle = true;

	// Adjust cache size based on size of frame and audio
	const int initial_cache_frames = std::max(Settings::Instance()->CACHE_MIN_FRAMES, OPEN_MP_NUM_PROCESSORS);
	final_cache.SetMaxBytesFromInfo(initial_cache_frames, info.width, info.height, info.sample_rate, info.channels);
}

// Destructor
FrameMapper::~FrameMapper() {