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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_OUTPUT_SNAPCAST_CLIENT_HXX
#define MPD_OUTPUT_SNAPCAST_CLIENT_HXX
#include "Chunk.hxx"
#include "event/BufferedSocket.hxx"
#include "util/IntrusiveList.hxx"
#include <chrono>
#include <cstdint>
struct SnapcastBase;
struct SnapcastTime;
class SnapcastOutput;
class UniqueSocketDescriptor;
class SnapcastClient final : BufferedSocket, public IntrusiveListHook
{
SnapcastOutput &output;
/**
* A queue of #Page objects to be sent to the client.
*/
SnapcastChunkQueue chunks;
uint16_t next_id = 1;
bool active = false;
public:
SnapcastClient(SnapcastOutput &output,
UniqueSocketDescriptor _fd) noexcept;
~SnapcastClient() noexcept;
/**
* Frees the client and removes it from the server's client list.
*
* Caller must lock the mutex.
*/
void Close() noexcept;
void LockClose() noexcept;
void SendStreamTags(ConstBuffer<void> payload) noexcept;
/**
* Caller must lock the mutex.
*/
void Push(SnapcastChunkPtr chunk) noexcept;
/**
* Caller must lock the mutex.
*/
bool IsDrained() const noexcept {
return chunks.empty();
}
/**
* Caller must lock the mutex.
*/
void Cancel() noexcept {
ClearQueue(chunks);
}
private:
SnapcastChunkPtr LockPopQueue() noexcept;
bool SendWireChunk(ConstBuffer<void> payload,
std::chrono::steady_clock::time_point t) noexcept;
bool SendServerSettings(const SnapcastBase &request) noexcept;
bool SendCodecHeader(const SnapcastBase &request) noexcept;
bool SendTime(const SnapcastBase &request_header,
const SnapcastTime &request_payload) noexcept;
/* virtual methods from class BufferedSocket */
void OnSocketReady(unsigned flags) noexcept override;
InputResult OnSocketInput(void *data, size_t length) noexcept override;
void OnSocketError(std::exception_ptr ep) noexcept override;
void OnSocketClosed() noexcept override;
};
#endif