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PiperOrigin-RevId: 496793199
This commit is contained in:
Jiuqiang Tang 2022-12-20 17:50:21 -08:00 committed by Copybara-Service
parent 64406a9bf2
commit 151e447614
2 changed files with 10 additions and 0 deletions
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6
mediapipe/calculators/core/sequence_shift_calculator.cc
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@ -66,12 +66,16 @@ class SequenceShiftCalculator : public Node {
// The number of packets or timestamps we need to store to output packet[i] at
// the timestamp of packet[i + packet_offset]; equal to abs(packet_offset).
int cache_size_;
bool emit_empty_packets_before_first_packet_ = false;
};
MEDIAPIPE_REGISTER_NODE(SequenceShiftCalculator);
absl::Status SequenceShiftCalculator::Open(CalculatorContext* cc) {
packet_offset_ = kOffset(cc).GetOr(
cc->Options<mediapipe::SequenceShiftCalculatorOptions>().packet_offset());
emit_empty_packets_before_first_packet_ =
cc->Options<mediapipe::SequenceShiftCalculatorOptions>()
.emit_empty_packets_before_first_packet();
cache_size_ = abs(packet_offset_);
// An offset of zero is a no-op, but someone might still request it.
if (packet_offset_ == 0) {
@ -96,6 +100,8 @@ void SequenceShiftCalculator::ProcessPositiveOffset(CalculatorContext* cc) {
// Ready to output oldest packet with current timestamp.
kOut(cc).Send(packet_cache_.front().At(cc->InputTimestamp()));
packet_cache_.pop_front();
} else if (emit_empty_packets_before_first_packet_) {
LOG(FATAL) << "Not supported yet";
}
// Store current packet for later output.
packet_cache_.push_back(kIn(cc).packet());

4
mediapipe/calculators/core/sequence_shift_calculator.proto
View File

@ -23,4 +23,8 @@ message SequenceShiftCalculatorOptions {
optional SequenceShiftCalculatorOptions ext = 107633927;
}
optional int32 packet_offset = 1 [default = -1];
// Emits empty packets before the first delayed packet is emitted. Takes
// effect only when packet offset is set to positive.
optional bool emit_empty_packets_before_first_packet = 2 [default = false];
}