xbmc/cores/AudioEngine/Sinks/alsa/ALSAHControlMonitor.h

   1 /*
   2  *  Copyright (C) 2014-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "platform/Platform.h"
  12
  13 #include <map>
  14 #include <string>
  15 #include <vector>
  16
  17 #include <alsa/asoundlib.h>
  18
  19 class CALSAHControlMonitor : public IPlatformService
  20 {
  21 public:
  22   CALSAHControlMonitor();
  23   ~CALSAHControlMonitor();
  24
  25   bool Add(const std::string& ctlHandleName,
  26            snd_ctl_elem_iface_t interface,
  27            unsigned int device,
  28            const std::string& name);
  29
  30   void Clear();
  31
  32   void Start();
  33   void Stop();
  34
  35 private:
  36   static int HCTLCallback(snd_hctl_elem_t *elem, unsigned int mask);
  37   static void FDEventCallback(int id, int fd, short revents, void *data);
  38
  39   snd_hctl_t* GetHandle(const std::string& ctlHandleName);
  40   void PutHandle(const std::string& ctlHandleName);
  41
  42   struct CTLHandle
  43   {
  44     snd_hctl_t *handle;
  45     int useCount = 0;
  46
  47     explicit CTLHandle(snd_hctl_t *handle_) : handle(handle_) {}
  48     CTLHandle() : handle(NULL) {}
  49   };
  50
  51   std::map<std::string, CTLHandle> m_ctlHandles;
  52
  53   std::vector<int> m_fdMonitorIds;
  54 };