139 lines
4.8 KiB
C++
139 lines
4.8 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.
|
|
|
|
#ifndef MEDIAPIPE_FRAMEWORK_OUTPUT_STREAM_SHARD_H_
|
|
#define MEDIAPIPE_FRAMEWORK_OUTPUT_STREAM_SHARD_H_
|
|
|
|
#include <list>
|
|
#include <string>
|
|
|
|
#include "mediapipe/framework/output_stream.h"
|
|
#include "mediapipe/framework/packet.h"
|
|
#include "mediapipe/framework/packet_type.h"
|
|
#include "mediapipe/framework/port.h"
|
|
#include "mediapipe/framework/timestamp.h"
|
|
|
|
namespace mediapipe {
|
|
|
|
class OutputStreamManager;
|
|
|
|
// The output stream spec shared across all output stream shards and their
|
|
// output stream manager.
|
|
struct OutputStreamSpec {
|
|
// Triggers the error callback with absl::Status info when an error
|
|
// occurs.
|
|
void TriggerErrorCallback(const absl::Status& status) const {
|
|
CHECK(error_callback);
|
|
error_callback(status);
|
|
}
|
|
|
|
std::string name;
|
|
const PacketType* packet_type;
|
|
std::function<void(absl::Status)> error_callback;
|
|
bool locked_intro_data;
|
|
// Those three variables are the intro data protected by locked_intro_data.
|
|
bool offset_enabled;
|
|
TimestampDiff offset;
|
|
Packet header;
|
|
};
|
|
|
|
// OutputStreamShard, a subclass of OutputStream, holds an output queue
|
|
// and a timetstamp bound of an output stream. Each call to
|
|
// Calculator::Open(), Calculator::Process(), and Calculator::Close() can only
|
|
// access its own OutputStreamShard.
|
|
class OutputStreamShard : public OutputStream {
|
|
public:
|
|
OutputStreamShard();
|
|
|
|
void SetSpec(OutputStreamSpec* output_stream_spec);
|
|
|
|
// TODO Remove this interface from OutputStream? No client is using
|
|
// this API.
|
|
const std::string& Name() const final;
|
|
|
|
// Sets the next timestamp bound in the OutputStreamShard.
|
|
void SetNextTimestampBound(Timestamp timestamp) final;
|
|
// Returns the next timestamp bound.
|
|
Timestamp NextTimestampBound() const final { return next_timestamp_bound_; }
|
|
|
|
// Marks the stream as closed in the OutputStreamShard. However, the output
|
|
// stream will still be open until the OutputStreamHandler processes the
|
|
// OutputStreamShard and executes OutputStreamManager::Close().
|
|
void Close() final;
|
|
bool IsClosed() const final;
|
|
|
|
// Sets the offset.
|
|
void SetOffset(TimestampDiff offset) final;
|
|
|
|
TimestampDiff Offset() const final { return output_stream_spec_->offset; }
|
|
|
|
bool OffsetEnabled() const final {
|
|
return output_stream_spec_->offset_enabled;
|
|
}
|
|
|
|
// Sets the stream header.
|
|
void SetHeader(const Packet& packet) final;
|
|
// Returns a const reference to the header packet.
|
|
const Packet& Header() const final;
|
|
|
|
// Adds a packet to the output stream shard.
|
|
void AddPacket(const Packet& packet) final;
|
|
// Takes an rvalue reference of the packet and moves the packet to the output
|
|
// stream shard.
|
|
void AddPacket(Packet&& packet) final;
|
|
|
|
// Returns true if the output queue is empty.
|
|
bool IsEmpty() const { return output_queue_.empty(); }
|
|
// Returns the timestamp of the last added packet in the output queue.
|
|
Timestamp LastAddedPacketTimestamp() const;
|
|
|
|
private:
|
|
// AddPacketInternal template is called by either AddPacket(Packet&& packet)
|
|
// or AddPacket(const Packet& packet).
|
|
template <typename T>
|
|
absl::Status AddPacketInternal(T&& packet);
|
|
|
|
// Returns a pointer to the output queue.
|
|
std::list<Packet>* OutputQueue() { return &output_queue_; }
|
|
const std::list<Packet>* OutputQueue() const { return &output_queue_; }
|
|
|
|
// Resets data members.
|
|
void Reset(Timestamp next_timestamp_bound, bool close);
|
|
|
|
// A pointer to the output stream spec object, which is owned by the output
|
|
// stream manager.
|
|
OutputStreamSpec* output_stream_spec_;
|
|
std::list<Packet> output_queue_;
|
|
bool closed_;
|
|
Timestamp next_timestamp_bound_;
|
|
// Equal to next_timestamp_bound_ only if the bound has been explicitly set
|
|
// by the calculator. This is needed for parallel Process() calls,
|
|
// in order to avoid propagating the initial next_timestamp_bound_, which
|
|
// does not reflect the output of Process() for preceding timestamps.
|
|
Timestamp updated_next_timestamp_bound_;
|
|
|
|
// Accesses OutputStreamShard for profiling.
|
|
friend class GraphProfiler;
|
|
// Accesses OutputStreamShard for profiling.
|
|
friend class GraphTracer;
|
|
// Accesses OutputStreamShard for profiling.
|
|
friend class PerfettoTraceScope;
|
|
// Accesses OutputStreamShard for post processing.
|
|
friend class OutputStreamManager;
|
|
};
|
|
|
|
} // namespace mediapipe
|
|
|
|
#endif // MEDIAPIPE_FRAMEWORK_OUTPUT_STREAM_SHARD_H_
|