class framerate_producer : public frame_producer_base
{
spl::shared_ptr<frame_producer> source_;
- boost::rational<int> source_framerate_;
- audio_channel_layout source_channel_layout_ = audio_channel_layout::invalid();
+ std::function<boost::rational<int>()> get_source_framerate_;
+ boost::rational<int> source_framerate_ = -1;
+ audio_channel_layout source_channel_layout_ = audio_channel_layout::invalid();
+ boost::rational<int> original_destination_framerate_;
+ field_mode original_destination_fieldmode_;
boost::rational<int> destination_framerate_;
field_mode destination_fieldmode_;
std::vector<int> destination_audio_cadence_;
std::function<draw_frame (
const draw_frame& source,
const draw_frame& destination,
- const boost::rational<int64_t>& distance)> interpolator_ = drop_and_skip;
+ const boost::rational<int64_t>& distance)> interpolator_ = drop_and_skip;
- boost::rational<std::int64_t> current_frame_number_ = 0;
- draw_frame previous_frame_ = draw_frame::empty();
- draw_frame next_frame_ = draw_frame::empty();
+ boost::rational<std::int64_t> current_frame_number_ = 0;
+ draw_frame previous_frame_ = draw_frame::empty();
+ draw_frame next_frame_ = draw_frame::empty();
mutable_audio_buffer audio_samples_;
- unsigned int output_repeat_ = 0;
- unsigned int output_frame_ = 0;
+ unsigned int output_repeat_ = 0;
+ unsigned int output_frame_ = 0;
public:
framerate_producer(
spl::shared_ptr<frame_producer> source,
- boost::rational<int> source_framerate,
+ std::function<boost::rational<int> ()> get_source_framerate,
boost::rational<int> destination_framerate,
field_mode destination_fieldmode,
std::vector<int> destination_audio_cadence)
: source_(std::move(source))
- , source_framerate_(std::move(source_framerate))
- , destination_framerate_(std::move(destination_framerate))
- , destination_fieldmode_(destination_fieldmode)
+ , get_source_framerate_(std::move(get_source_framerate))
+ , original_destination_framerate_(std::move(destination_framerate))
+ , original_destination_fieldmode_(destination_fieldmode)
, destination_audio_cadence_(std::move(destination_audio_cadence))
{
- // Coarse adjustment to correct fps family (23.98 - 30 vs 47.95 - 60)
- if (destination_fieldmode_ != field_mode::progressive) // Interlaced output
- {
- auto diff_double = boost::abs(source_framerate_ - destination_framerate_ * 2);
- auto diff_keep = boost::abs(source_framerate_ - destination_framerate_);
-
- if (diff_double < diff_keep) // Double rate interlaced
- {
- destination_framerate_ *= 2;
- }
- else // Progressive non interlaced
- {
- destination_fieldmode_ = field_mode::progressive;
- }
- }
- else // Progressive
- {
- auto diff_halve = boost::abs(source_framerate_ * 2 - destination_framerate_);
- auto diff_keep = boost::abs(source_framerate_ - destination_framerate_);
-
- if (diff_halve < diff_keep) // Repeat every frame two times
- {
- destination_framerate_ /= 2;
- output_repeat_ = 2;
- }
- }
-
- speed_ = boost::rational<int64_t>(source_framerate_ / destination_framerate_);
-
- // drop_and_skip will only be used by default for exact framerate multiples (half, same and double)
- // for all other framerates a frame interpolator will be chosen.
- if (speed_ != 1 && speed_ * 2 != 1 && speed_ != 2)
- {
- auto high_source_framerate = source_framerate_ > 47;
- auto high_destination_framerate = destination_framerate_ > 47
- || destination_fieldmode_ != field_mode::progressive;
-
- if (high_source_framerate && high_destination_framerate) // The bluriness of blend_all is acceptable on high framerates.
- interpolator_ = blend_all();
- else // blend_all is mostly too blurry on low framerates. blend provides a compromise.
- interpolator_ = &blend;
-
- CASPAR_LOG(warning) << source_->print() << L" Frame blending frame rate conversion required to conform to channel frame rate.";
- }
-
// Note: Uses 1 step rotated cadence for 1001 modes (1602, 1602, 1601, 1602, 1601)
// This cadence fills the audio mixer most optimally.
boost::range::rotate(destination_audio_cadence_, std::end(destination_audio_cadence_) - 1);
draw_frame pop_frame_from_source()
{
auto frame = source_->receive();
+ update_source_framerate();
if (user_speed_.fetch() == 1)
{
|| user_speed_.fetch() != 1
|| audio_samples_.size() / source_channel_layout_.num_channels >= destination_audio_cadence_.at(0);
}
+
+ void update_source_framerate()
+ {
+ auto source_framerate = get_source_framerate_();
+
+ if (source_framerate_ == source_framerate)
+ return;
+
+ source_framerate_ = source_framerate;
+ destination_framerate_ = original_destination_framerate_;
+ destination_fieldmode_ = original_destination_fieldmode_;
+
+ // Coarse adjustment to correct fps family (23.98 - 30 vs 47.95 - 60)
+ if (destination_fieldmode_ != field_mode::progressive) // Interlaced output
+ {
+ auto diff_double = boost::abs(source_framerate_ - destination_framerate_ * 2);
+ auto diff_keep = boost::abs(source_framerate_ - destination_framerate_);
+
+ if (diff_double < diff_keep) // Double rate interlaced
+ {
+ destination_framerate_ *= 2;
+ }
+ else // Progressive non interlaced
+ {
+ destination_fieldmode_ = field_mode::progressive;
+ }
+ }
+ else // Progressive
+ {
+ auto diff_halve = boost::abs(source_framerate_ * 2 - destination_framerate_);
+ auto diff_keep = boost::abs(source_framerate_ - destination_framerate_);
+
+ if (diff_halve < diff_keep) // Repeat every frame two times
+ {
+ destination_framerate_ /= 2;
+ output_repeat_ = 2;
+ }
+ }
+
+ speed_ = boost::rational<int64_t>(source_framerate_ / destination_framerate_);
+
+ // drop_and_skip will only be used by default for exact framerate multiples (half, same and double)
+ // for all other framerates a frame interpolator will be chosen.
+ if (speed_ != 1 && speed_ * 2 != 1 && speed_ != 2)
+ {
+ auto high_source_framerate = source_framerate_ > 47;
+ auto high_destination_framerate = destination_framerate_ > 47
+ || destination_fieldmode_ != field_mode::progressive;
+
+ if (high_source_framerate && high_destination_framerate) // The bluriness of blend_all is acceptable on high framerates.
+ interpolator_ = blend_all();
+ else // blend_all is mostly too blurry on low framerates. blend provides a compromise.
+ interpolator_ = &blend;
+
+ CASPAR_LOG(warning) << source_->print() << L" Frame blending frame rate conversion required to conform to channel frame rate.";
+ }
+ }
};
void describe_framerate_producer(help_sink& sink)
spl::shared_ptr<frame_producer> create_framerate_producer(
spl::shared_ptr<frame_producer> source,
- boost::rational<int> source_framerate,
+ std::function<boost::rational<int> ()> get_source_framerate,
boost::rational<int> destination_framerate,
field_mode destination_fieldmode,
std::vector<int> destination_audio_cadence)
{
return spl::make_shared<framerate_producer>(
std::move(source),
- std::move(source_framerate),
+ std::move(get_source_framerate),
std::move(destination_framerate),
destination_fieldmode,
std::move(destination_audio_cadence));
projects / casparcg / blobdiff