src/add-ons/kernel/drivers/audio/ac97/sis7018/Stream.h

   1 /*
   2  *      SiS 7018, Trident 4D Wave DX/NX, Acer Lab M5451 Sound Driver.
   3  *      Copyright (c) 2002, 2008-2011 S.Zharski <imker@gmx.li>
   4  *      Distributed under the terms of the MIT license.
   5  *
   6  */
   7 #ifndef _SiS7018_STREAM_H_
   8 #define _SiS7018_STREAM_H_
   9
  10
  11 #include "hmulti_audio.h"
  12
  13
  14 class Device;
  15
  16 class Stream {
  17 public:
  18                                                         Stream(Device* device, bool isInput);
  19                                                         ~Stream();
  20
  21                 status_t                        Init();
  22                 void                            Free();
  23                 status_t                        InitCheck() { return fStatus; }
  24
  25                 status_t                        Start();
  26                 status_t                        Stop();
  27                 bool                            IsActive() { return fIsActive; }
  28
  29                 void                            GetBuffers(uint32& Flags,
  30                                                                                 int32& BuffersCount,
  31                                                                                 int32& ChannelsCount,
  32                                                                                 uint32& BufferSize,
  33                                                                                 buffer_desc** Buffers);
  34
  35                 void                            ExchangeBuffers(bigtime_t& RealTime,
  36                                                                                         bigtime_t& FramesCount,
  37                                                                                         int32& BufferCycle);
  38
  39                 void                            GetFormat(multi_format_info *Format);
  40                 status_t                        SetFormat(_multi_format& format,
  41                                                                                         uint32 formats, uint32 rates);
  42
  43                 bool                            InterruptHandler();
  44
  45 private:
  46
  47                 uint32                          _DecodeRate(uint32 rate);
  48 inline  bool                            _UseBankB() { return (fHWChannel & 0x20) == 0x20; }
  49 inline  uint32                          _HWVoice() { return fHWChannel & 0x1f; }
  50 inline  uint32                          _HWId();
  51
  52                 Device*                         fDevice;
  53                 status_t                        fStatus;
  54                 bool                            fIsInput;
  55                 bool                            fIsActive;
  56                 uint32                          fHWChannel;
  57
  58                 area_id                         fBuffersArea;
  59                 size_t                          fBuffersAreaSize;
  60                 size_t                          fBufferSamplesCount;
  61                 void*                           fBuffersAddress;
  62                 phys_addr_t                     fBuffersPhysAddress;
  63
  64                 _multi_format           fFormat;
  65                 bigtime_t                       fRealTime;
  66                 bigtime_t                       fFramesCount;
  67                 int32                           fBufferCycle;
  68 };
  69
  70
  71 #endif // _SiS7018_STREAM_H_
  72