alc/backends/base.cpp

   1
   2 #include "config.h"
   3
   4 #include "base.h"
   5
   6 #include <algorithm>
   7 #include <array>
   8 #include <atomic>
   9
  10 #ifdef _WIN32
  11 #define WIN32_LEAN_AND_MEAN
  12 #include <windows.h>
  13 #include <mmreg.h>
  14
  15 #include "albit.h"
  16 #include "core/logging.h"
  17 #include "aloptional.h"
  18 #endif
  19
  20 #include "atomic.h"
  21 #include "core/devformat.h"
  22
  23
  24 bool BackendBase::reset()
  25 { throw al::backend_exception{al::backend_error::DeviceError, "Invalid BackendBase call"}; }
  26
  27 void BackendBase::captureSamples(al::byte*, uint)
  28 { }
  29
  30 uint BackendBase::availableSamples()
  31 { return 0; }
  32
  33 ClockLatency BackendBase::getClockLatency()
  34 {
  35     ClockLatency ret;
  36
  37     uint refcount;
  38     do {
  39         refcount = mDevice->waitForMix();
  40         ret.ClockTime = GetDeviceClockTime(mDevice);
  41         std::atomic_thread_fence(std::memory_order_acquire);
  42     } while(refcount != ReadRef(mDevice->MixCount));
  43
  44     /* NOTE: The device will generally have about all but one periods filled at
  45      * any given time during playback. Without a more accurate measurement from
  46      * the output, this is an okay approximation.
  47      */
  48     ret.Latency = std::max(std::chrono::seconds{mDevice->BufferSize-mDevice->UpdateSize},
  49         std::chrono::seconds::zero());
  50     ret.Latency /= mDevice->Frequency;
  51
  52     return ret;
  53 }
  54
  55 void BackendBase::setDefaultWFXChannelOrder()
  56 {
  57     mDevice->RealOut.ChannelIndex.fill(INVALID_CHANNEL_INDEX);
  58
  59     switch(mDevice->FmtChans)
  60     {
  61     case DevFmtMono:
  62         mDevice->RealOut.ChannelIndex[FrontCenter] = 0;
  63         break;
  64     case DevFmtStereo:
  65         mDevice->RealOut.ChannelIndex[FrontLeft]  = 0;
  66         mDevice->RealOut.ChannelIndex[FrontRight] = 1;
  67         break;
  68     case DevFmtQuad:
  69         mDevice->RealOut.ChannelIndex[FrontLeft]  = 0;
  70         mDevice->RealOut.ChannelIndex[FrontRight] = 1;
  71         mDevice->RealOut.ChannelIndex[BackLeft]   = 2;
  72         mDevice->RealOut.ChannelIndex[BackRight]  = 3;
  73         break;
  74     case DevFmtX51:
  75         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
  76         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
  77         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
  78         mDevice->RealOut.ChannelIndex[LFE]         = 3;
  79         mDevice->RealOut.ChannelIndex[SideLeft]    = 4;
  80         mDevice->RealOut.ChannelIndex[SideRight]   = 5;
  81         break;
  82     case DevFmtX61:
  83         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
  84         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
  85         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
  86         mDevice->RealOut.ChannelIndex[LFE]         = 3;
  87         mDevice->RealOut.ChannelIndex[BackCenter]  = 4;
  88         mDevice->RealOut.ChannelIndex[SideLeft]    = 5;
  89         mDevice->RealOut.ChannelIndex[SideRight]   = 6;
  90         break;
  91     case DevFmtX71:
  92         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
  93         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
  94         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
  95         mDevice->RealOut.ChannelIndex[LFE]         = 3;
  96         mDevice->RealOut.ChannelIndex[BackLeft]    = 4;
  97         mDevice->RealOut.ChannelIndex[BackRight]   = 5;
  98         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
  99         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 100         break;
 101     case DevFmtX3D71:
 102         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 103         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 104         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
 105         mDevice->RealOut.ChannelIndex[LFE]         = 3;
 106         mDevice->RealOut.ChannelIndex[Aux0]        = 4;
 107         mDevice->RealOut.ChannelIndex[Aux1]        = 5;
 108         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 109         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 110         break;
 111     case DevFmtAmbi3D:
 112         break;
 113     }
 114 }
 115
 116 void BackendBase::setDefaultChannelOrder()
 117 {
 118     mDevice->RealOut.ChannelIndex.fill(INVALID_CHANNEL_INDEX);
 119
 120     switch(mDevice->FmtChans)
 121     {
 122     case DevFmtX51:
 123         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 124         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 125         mDevice->RealOut.ChannelIndex[SideLeft]    = 2;
 126         mDevice->RealOut.ChannelIndex[SideRight]   = 3;
 127         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 128         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 129         return;
 130     case DevFmtX71:
 131         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 132         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 133         mDevice->RealOut.ChannelIndex[BackLeft]    = 2;
 134         mDevice->RealOut.ChannelIndex[BackRight]   = 3;
 135         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 136         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 137         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 138         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 139         return;
 140     case DevFmtX3D71:
 141         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 142         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 143         mDevice->RealOut.ChannelIndex[Aux0]        = 2;
 144         mDevice->RealOut.ChannelIndex[Aux1]        = 3;
 145         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 146         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 147         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 148         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 149         return;
 150
 151     /* Same as WFX order */
 152     case DevFmtMono:
 153     case DevFmtStereo:
 154     case DevFmtQuad:
 155     case DevFmtX61:
 156     case DevFmtAmbi3D:
 157         setDefaultWFXChannelOrder();
 158         break;
 159     }
 160 }