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 namespace al {
  25
  26 backend_exception::backend_exception(backend_error code, const char *msg, ...) : mErrorCode{code}
  27 {
  28     std::va_list args;
  29     va_start(args, msg);
  30     setMessage(msg, args);
  31     va_end(args);
  32 }
  33 backend_exception::~backend_exception() = default;
  34
  35 } // namespace al
  36
  37
  38 bool BackendBase::reset()
  39 { throw al::backend_exception{al::backend_error::DeviceError, "Invalid BackendBase call"}; }
  40
  41 void BackendBase::captureSamples(al::byte*, uint)
  42 { }
  43
  44 uint BackendBase::availableSamples()
  45 { return 0; }
  46
  47 ClockLatency BackendBase::getClockLatency()
  48 {
  49     ClockLatency ret;
  50
  51     uint refcount;
  52     do {
  53         refcount = mDevice->waitForMix();
  54         ret.ClockTime = GetDeviceClockTime(mDevice);
  55         std::atomic_thread_fence(std::memory_order_acquire);
  56     } while(refcount != ReadRef(mDevice->MixCount));
  57
  58     /* NOTE: The device will generally have about all but one periods filled at
  59      * any given time during playback. Without a more accurate measurement from
  60      * the output, this is an okay approximation.
  61      */
  62     ret.Latency = std::max(std::chrono::seconds{mDevice->BufferSize-mDevice->UpdateSize},
  63         std::chrono::seconds::zero());
  64     ret.Latency /= mDevice->Frequency;
  65
  66     return ret;
  67 }
  68
  69 void BackendBase::setDefaultWFXChannelOrder()
  70 {
  71     mDevice->RealOut.ChannelIndex.fill(InvalidChannelIndex);
  72
  73     switch(mDevice->FmtChans)
  74     {
  75     case DevFmtMono:
  76         mDevice->RealOut.ChannelIndex[FrontCenter] = 0;
  77         break;
  78     case DevFmtStereo:
  79         mDevice->RealOut.ChannelIndex[FrontLeft]  = 0;
  80         mDevice->RealOut.ChannelIndex[FrontRight] = 1;
  81         break;
  82     case DevFmtQuad:
  83         mDevice->RealOut.ChannelIndex[FrontLeft]  = 0;
  84         mDevice->RealOut.ChannelIndex[FrontRight] = 1;
  85         mDevice->RealOut.ChannelIndex[BackLeft]   = 2;
  86         mDevice->RealOut.ChannelIndex[BackRight]  = 3;
  87         break;
  88     case DevFmtX51:
  89         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
  90         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
  91         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
  92         mDevice->RealOut.ChannelIndex[LFE]         = 3;
  93         mDevice->RealOut.ChannelIndex[SideLeft]    = 4;
  94         mDevice->RealOut.ChannelIndex[SideRight]   = 5;
  95         break;
  96     case DevFmtX61:
  97         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
  98         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
  99         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
 100         mDevice->RealOut.ChannelIndex[LFE]         = 3;
 101         mDevice->RealOut.ChannelIndex[BackCenter]  = 4;
 102         mDevice->RealOut.ChannelIndex[SideLeft]    = 5;
 103         mDevice->RealOut.ChannelIndex[SideRight]   = 6;
 104         break;
 105     case DevFmtX71:
 106         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 107         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 108         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
 109         mDevice->RealOut.ChannelIndex[LFE]         = 3;
 110         mDevice->RealOut.ChannelIndex[BackLeft]    = 4;
 111         mDevice->RealOut.ChannelIndex[BackRight]   = 5;
 112         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 113         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 114         break;
 115     case DevFmtX714:
 116         mDevice->RealOut.ChannelIndex[FrontLeft]     = 0;
 117         mDevice->RealOut.ChannelIndex[FrontRight]    = 1;
 118         mDevice->RealOut.ChannelIndex[FrontCenter]   = 2;
 119         mDevice->RealOut.ChannelIndex[LFE]           = 3;
 120         mDevice->RealOut.ChannelIndex[BackLeft]      = 4;
 121         mDevice->RealOut.ChannelIndex[BackRight]     = 5;
 122         mDevice->RealOut.ChannelIndex[SideLeft]      = 6;
 123         mDevice->RealOut.ChannelIndex[SideRight]     = 7;
 124         mDevice->RealOut.ChannelIndex[TopFrontLeft]  = 8;
 125         mDevice->RealOut.ChannelIndex[TopFrontRight] = 9;
 126         mDevice->RealOut.ChannelIndex[TopBackLeft]   = 10;
 127         mDevice->RealOut.ChannelIndex[TopBackRight]  = 11;
 128         break;
 129     case DevFmtX3D71:
 130         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 131         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 132         mDevice->RealOut.ChannelIndex[FrontCenter] = 2;
 133         mDevice->RealOut.ChannelIndex[LFE]         = 3;
 134         mDevice->RealOut.ChannelIndex[Aux0]        = 4;
 135         mDevice->RealOut.ChannelIndex[Aux1]        = 5;
 136         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 137         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 138         break;
 139     case DevFmtAmbi3D:
 140         break;
 141     }
 142 }
 143
 144 void BackendBase::setDefaultChannelOrder()
 145 {
 146     mDevice->RealOut.ChannelIndex.fill(InvalidChannelIndex);
 147
 148     switch(mDevice->FmtChans)
 149     {
 150     case DevFmtX51:
 151         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 152         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 153         mDevice->RealOut.ChannelIndex[SideLeft]    = 2;
 154         mDevice->RealOut.ChannelIndex[SideRight]   = 3;
 155         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 156         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 157         return;
 158     case DevFmtX71:
 159         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 160         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 161         mDevice->RealOut.ChannelIndex[BackLeft]    = 2;
 162         mDevice->RealOut.ChannelIndex[BackRight]   = 3;
 163         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 164         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 165         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 166         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 167         return;
 168     case DevFmtX714:
 169         mDevice->RealOut.ChannelIndex[FrontLeft]     = 0;
 170         mDevice->RealOut.ChannelIndex[FrontRight]    = 1;
 171         mDevice->RealOut.ChannelIndex[BackLeft]      = 2;
 172         mDevice->RealOut.ChannelIndex[BackRight]     = 3;
 173         mDevice->RealOut.ChannelIndex[FrontCenter]   = 4;
 174         mDevice->RealOut.ChannelIndex[LFE]           = 5;
 175         mDevice->RealOut.ChannelIndex[SideLeft]      = 6;
 176         mDevice->RealOut.ChannelIndex[SideRight]     = 7;
 177         mDevice->RealOut.ChannelIndex[TopFrontLeft]  = 8;
 178         mDevice->RealOut.ChannelIndex[TopFrontRight] = 9;
 179         mDevice->RealOut.ChannelIndex[TopBackLeft]   = 10;
 180         mDevice->RealOut.ChannelIndex[TopBackRight]  = 11;
 181         break;
 182     case DevFmtX3D71:
 183         mDevice->RealOut.ChannelIndex[FrontLeft]   = 0;
 184         mDevice->RealOut.ChannelIndex[FrontRight]  = 1;
 185         mDevice->RealOut.ChannelIndex[Aux0]        = 2;
 186         mDevice->RealOut.ChannelIndex[Aux1]        = 3;
 187         mDevice->RealOut.ChannelIndex[FrontCenter] = 4;
 188         mDevice->RealOut.ChannelIndex[LFE]         = 5;
 189         mDevice->RealOut.ChannelIndex[SideLeft]    = 6;
 190         mDevice->RealOut.ChannelIndex[SideRight]   = 7;
 191         return;
 192
 193     /* Same as WFX order */
 194     case DevFmtMono:
 195     case DevFmtStereo:
 196     case DevFmtQuad:
 197     case DevFmtX61:
 198     case DevFmtAmbi3D:
 199         setDefaultWFXChannelOrder();
 200         break;
 201     }
 202 }