/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <base/logging.h>
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#include <base/macros.h>
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#include <iostream>
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#include "hardware/avrcp/avrcp_common.h"
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#include "hardware/avrcp/avrcp_logging_helper.h"
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#include "packet/base/iterator.h"
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#include "packet/base/packet.h"
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#include "packet/base/packet_builder.h"
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namespace bluetooth {
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namespace avrcp {
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class PacketBuilder : public ::bluetooth::PacketBuilder {
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public:
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virtual ~PacketBuilder() = default;
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static std::unique_ptr<PacketBuilder> MakeBuilder(
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CType cType, uint8_t subunit_type, uint8_t subunit_id, Opcode opcode,
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std::unique_ptr<::bluetooth::PacketBuilder> packet);
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virtual size_t size() const override;
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virtual bool Serialize(
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const std::shared_ptr<::bluetooth::Packet>& pkt) override;
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protected:
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CType c_type_;
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uint8_t subunit_type_ : 5;
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uint8_t subunit_id_ : 3;
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Opcode opcode_;
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std::unique_ptr<::bluetooth::PacketBuilder> payload_;
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void PushHeader(const std::shared_ptr<::bluetooth::Packet>& pkt);
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bool PushCompanyId(const std::shared_ptr<::bluetooth::Packet>& pkt,
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uint32_t company_id);
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PacketBuilder(CType type, uint8_t subunit_type, uint8_t subunit_id,
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Opcode opcode)
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: c_type_(type),
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subunit_type_(subunit_type),
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subunit_id_(subunit_id),
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opcode_(opcode){};
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};
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class Packet : public ::bluetooth::Packet {
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public:
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virtual ~Packet() = default;
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// TODO (apanicke): Right now we can use this to build an AvrcpPacket from
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// another packet type. In the future, we can remove this in favor of
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// getting an AVRCP Packet directly from an AVCTP Packet
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static std::shared_ptr<Packet> Parse(
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std::shared_ptr<::bluetooth::Packet> pkt);
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/**
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* Avrcp Packet Layout
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* CType c_type_;
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* uint8_t subunit_type_ : 5;
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* uint8_t subunit_id_ : 3;
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* Opcode opcode_;
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* uint8_t[] payload_;
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*/
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static constexpr size_t kMinSize() { return 3; };
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// Getter Functions
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CType GetCType() const;
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uint8_t GetSubunitType() const;
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uint8_t GetSubunitId() const;
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Opcode GetOpcode() const;
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// Overloaded Functions
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virtual bool IsValid() const override;
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virtual std::string ToString() const override;
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protected:
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using ::bluetooth::Packet::Packet;
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static inline uint32_t PullCompanyId(Iterator it) {
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uint32_t value = 0;
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for (int i = 0; i < 3; i++) {
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value <<= 8;
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value |= *it++;
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}
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return value;
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}
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private:
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virtual std::pair<size_t, size_t> GetPayloadIndecies() const override;
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DISALLOW_COPY_AND_ASSIGN(Packet);
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};
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} // namespace avrcp
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} // namespace bluetooth
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