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/*
* Copyright 2018 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <base/logging.h>
#include <iostream>
#include "hardware/avrcp/avrcp_common.h"
#include "hardware/avrcp/avrcp_logging_helper.h"
#include "packet/base/iterator.h"
#include "packet/base/packet.h"
#include "packet/base/packet_builder.h"
namespace bluetooth {
namespace avrcp {
class PacketBuilder : public ::bluetooth::PacketBuilder {
public:
virtual ~PacketBuilder() = default;
static std::unique_ptr<PacketBuilder> MakeBuilder(
CType cType, uint8_t subunit_type, uint8_t subunit_id, Opcode opcode,
std::unique_ptr<::bluetooth::PacketBuilder> packet);
virtual size_t size() const override;
virtual bool Serialize(
const std::shared_ptr<::bluetooth::Packet>& pkt) override;
protected:
CType c_type_;
uint8_t subunit_type_ : 5;
uint8_t subunit_id_ : 3;
Opcode opcode_;
std::unique_ptr<::bluetooth::PacketBuilder> payload_;
void PushHeader(const std::shared_ptr<::bluetooth::Packet>& pkt);
bool PushCompanyId(const std::shared_ptr<::bluetooth::Packet>& pkt,
uint32_t company_id);
PacketBuilder(CType type, uint8_t subunit_type, uint8_t subunit_id,
Opcode opcode)
: c_type_(type),
subunit_type_(subunit_type),
subunit_id_(subunit_id),
opcode_(opcode){};
};
class Packet : public ::bluetooth::Packet {
public:
Packet(const Packet&) = delete;
Packet& operator=(const Packet&) = delete;
virtual ~Packet() = default;
// TODO (apanicke): Right now we can use this to build an AvrcpPacket from
// another packet type. In the future, we can remove this in favor of
// getting an AVRCP Packet directly from an AVCTP Packet
static std::shared_ptr<Packet> Parse(
std::shared_ptr<::bluetooth::Packet> pkt);
/**
* Avrcp Packet Layout
* CType c_type_;
* uint8_t subunit_type_ : 5;
* uint8_t subunit_id_ : 3;
* Opcode opcode_;
* uint8_t[] payload_;
*/
static constexpr size_t kMinSize() { return 3; };
// Getter Functions
CType GetCType() const;
uint8_t GetSubunitType() const;
uint8_t GetSubunitId() const;
Opcode GetOpcode() const;
// Overloaded Functions
virtual bool IsValid() const override;
virtual std::string ToString() const override;
protected:
using ::bluetooth::Packet::Packet;
static inline uint32_t PullCompanyId(Iterator it) {
uint32_t value = 0;
for (int i = 0; i < 3; i++) {
value <<= 8;
value |= *it++;
}
return value;
}
private:
virtual std::pair<size_t, size_t> GetPayloadIndecies() const override;
};
} // namespace avrcp
} // namespace bluetooth
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