104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
// Copyright 2019 The MediaPipe Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <functional>
|
|
#include <string>
|
|
|
|
#include "mediapipe/calculators/internal/callback_packet_calculator.pb.h" // NOLINT
|
|
#include "mediapipe/framework/calculator_base.h"
|
|
#include "mediapipe/framework/calculator_registry.h"
|
|
#include "mediapipe/framework/output_side_packet.h"
|
|
|
|
namespace mediapipe {
|
|
|
|
namespace {
|
|
|
|
// Callback function for writing a packet to a vector. The output is before the
|
|
// input since std::bind fills arguments from left to right (and only
|
|
// dumped_data is filled by std::bind).
|
|
void DumpToVector(std::vector<Packet>* dumped_data, const Packet& packet) {
|
|
dumped_data->push_back(packet);
|
|
}
|
|
|
|
// Callback function for saving the Timestamp::PostStream() packet.
|
|
// The output is before the input since std::bind fills arguments from left to
|
|
// right (and only post_stream_packet is filled by std::bind).
|
|
void DumpPostStreamPacket(Packet* post_stream_packet, const Packet& packet) {
|
|
if (packet.Timestamp() == Timestamp::PostStream()) {
|
|
*post_stream_packet = packet;
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
// Creates a callback which takes a packet and stores it either in a
|
|
// vector of packets or stores only the packet at PostStream timestamp.
|
|
// The kind of callback is controlled by an option. The callback is
|
|
// a std::function and is directly usable by CallbackCalculator.
|
|
// Since the options for the packet generator include a serialized pointer
|
|
// value, the resulting callback is only valid on the original machine
|
|
// while that pointer is still alive.
|
|
class CallbackPacketCalculator : public CalculatorBase {
|
|
public:
|
|
static absl::Status GetContract(CalculatorContract* cc) {
|
|
const auto& options = cc->Options<CallbackPacketCalculatorOptions>();
|
|
switch (options.type()) {
|
|
case CallbackPacketCalculatorOptions::VECTOR_PACKET:
|
|
case CallbackPacketCalculatorOptions::POST_STREAM_PACKET:
|
|
cc->OutputSidePackets()
|
|
.Index(0)
|
|
.Set<std::function<void(const Packet&)>>();
|
|
break;
|
|
default:
|
|
return mediapipe::InvalidArgumentErrorBuilder(MEDIAPIPE_LOC)
|
|
<< "Invalid type of callback to produce.";
|
|
}
|
|
return absl::OkStatus();
|
|
}
|
|
|
|
absl::Status Open(CalculatorContext* cc) override {
|
|
const auto& options = cc->Options<CallbackPacketCalculatorOptions>();
|
|
void* ptr;
|
|
if (sscanf(options.pointer().c_str(), "%p", &ptr) != 1) {
|
|
return mediapipe::InvalidArgumentErrorBuilder(MEDIAPIPE_LOC)
|
|
<< "Stored pointer value in options is invalid.";
|
|
}
|
|
switch (options.type()) {
|
|
case CallbackPacketCalculatorOptions::VECTOR_PACKET:
|
|
cc->OutputSidePackets().Index(0).Set(
|
|
MakePacket<std::function<void(const Packet&)>>(std::bind(
|
|
&DumpToVector, reinterpret_cast<std::vector<Packet>*>(ptr),
|
|
std::placeholders::_1)));
|
|
break;
|
|
case CallbackPacketCalculatorOptions::POST_STREAM_PACKET:
|
|
cc->OutputSidePackets().Index(0).Set(
|
|
MakePacket<std::function<void(const Packet&)>>(
|
|
std::bind(&DumpPostStreamPacket, reinterpret_cast<Packet*>(ptr),
|
|
std::placeholders::_1)));
|
|
break;
|
|
default:
|
|
return mediapipe::InvalidArgumentErrorBuilder(MEDIAPIPE_LOC)
|
|
<< "Invalid type to dump into.";
|
|
}
|
|
return absl::OkStatus();
|
|
}
|
|
|
|
absl::Status Process(CalculatorContext* cc) override {
|
|
return absl::OkStatus();
|
|
}
|
|
};
|
|
|
|
REGISTER_CALCULATOR(CallbackPacketCalculator);
|
|
|
|
} // namespace mediapipe
|