src/buffer.cpp

   1
   2 #include "config.h"
   3
   4 #include "buffer.h"
   5
   6 #include <stdexcept>
   7 #include <sstream>
   8 #include <cstring>
   9
  10 #include "al.h"
  11 #include "alext.h"
  12
  13 #include "context.h"
  14
  15 namespace alure
  16 {
  17
  18 void BufferImpl::cleanup()
  19 {
  20     if(isInUse())
  21         throw std::runtime_error("Buffer is in use");
  22
  23     alGetError();
  24     alDeleteBuffers(1, &mId);
  25     if(alGetError() != AL_NO_ERROR)
  26         throw std::runtime_error("Buffer failed to delete");
  27     mId = 0;
  28 }
  29
  30
  31 void BufferImpl::load(ALuint frames, ALenum format, SharedPtr<Decoder> decoder, ContextImpl *ctx)
  32 {
  33     Vector<ALbyte> data(FramesToBytes(frames, mChannelConfig, mSampleType));
  34
  35     ALuint got = decoder->read(data.data(), frames);
  36     if(got > 0)
  37     {
  38         frames = got;
  39         data.resize(FramesToBytes(frames, mChannelConfig, mSampleType));
  40     }
  41     else
  42     {
  43         ALbyte silence = 0;
  44         if(mSampleType == SampleType::UInt8) silence = 0x80;
  45         else if(mSampleType == SampleType::Mulaw) silence = 0x7f;
  46         std::fill(data.begin(), data.end(), silence);
  47     }
  48
  49     std::pair<uint64_t,uint64_t> loop_pts = decoder->getLoopPoints();
  50     if(loop_pts.first >= loop_pts.second)
  51         loop_pts = std::make_pair(0, frames);
  52     else
  53     {
  54         loop_pts.second = std::min<uint64_t>(loop_pts.second, frames);
  55         loop_pts.first = std::min<uint64_t>(loop_pts.first, loop_pts.second-1);
  56     }
  57
  58     ctx->send(&MessageHandler::bufferLoading,
  59         mName, mChannelConfig, mSampleType, mFrequency, data
  60     );
  61
  62     alBufferData(mId, format, data.data(), data.size(), mFrequency);
  63     if(ctx->hasExtension(AL::SOFT_loop_points))
  64     {
  65         ALint pts[2]{(ALint)loop_pts.first, (ALint)loop_pts.second};
  66         alBufferiv(mId, AL_LOOP_POINTS_SOFT, pts);
  67     }
  68 }
  69
  70
  71 ALuint BufferImpl::getLength() const
  72 {
  73     CheckContext(mContext);
  74
  75     ALint size=-1, bits=-1, chans=-1;
  76     alGetBufferi(mId, AL_SIZE, &size);
  77     alGetBufferi(mId, AL_BITS, &bits);
  78     alGetBufferi(mId, AL_CHANNELS, &chans);
  79     if(size < 0 || bits < 0 || chans < 0)
  80         throw std::runtime_error("Buffer format error");
  81     return size / chans * 8 / bits;
  82 }
  83
  84 ALuint BufferImpl::getSize() const
  85 {
  86     CheckContext(mContext);
  87
  88     ALint size = -1;
  89     alGetBufferi(mId, AL_SIZE, &size);
  90     if(size < 0)
  91         throw std::runtime_error("Buffer size error");
  92     return size;
  93 }
  94
  95 void BufferImpl::setLoopPoints(ALuint start, ALuint end)
  96 {
  97     ALuint length = getLength();
  98
  99     if(isInUse())
 100         throw std::runtime_error("Buffer is in use");
 101
 102     if(!mContext->hasExtension(AL::SOFT_loop_points))
 103     {
 104         if(start != 0 || end != length)
 105             throw std::runtime_error("Loop points not supported");
 106         return;
 107     }
 108
 109     if(start >= end || end > length)
 110         throw std::runtime_error("Loop points out of range");
 111
 112     ALint pts[2]{(ALint)start, (ALint)end};
 113     alGetError();
 114     alBufferiv(mId, AL_LOOP_POINTS_SOFT, pts);
 115     if(alGetError() != AL_NO_ERROR)
 116         throw std::runtime_error("Failed to set loop points");
 117 }
 118
 119 std::pair<ALuint,ALuint> BufferImpl::getLoopPoints() const
 120 {
 121     CheckContext(mContext);
 122
 123     if(!mContext->hasExtension(AL::SOFT_loop_points))
 124         return std::make_pair(0, getLength());
 125
 126     ALint pts[2]{-1,-1};
 127     alGetBufferiv(mId, AL_LOOP_POINTS_SOFT, pts);
 128     if(pts[0] == -1 || pts[1] == -1)
 129         throw std::runtime_error("Failed to get loop points");
 130
 131     return std::make_pair(pts[0], pts[1]);
 132 }
 133
 134
 135 using ALuintPair = std::pair<ALuint,ALuint>;
 136 DECL_THUNK0(ALuint, Buffer, getLength, const)
 137 DECL_THUNK0(ALuint, Buffer, getFrequency, const)
 138 DECL_THUNK0(ChannelConfig, Buffer, getChannelConfig, const)
 139 DECL_THUNK0(SampleType, Buffer, getSampleType, const)
 140 DECL_THUNK0(ALuint, Buffer, getSize, const)
 141 DECL_THUNK2(void, Buffer, setLoopPoints,, ALuint, ALuint)
 142 DECL_THUNK0(ALuintPair, Buffer, getLoopPoints, const)
 143 DECL_THUNK0(Vector<Source>, Buffer, getSources, const)
 144 DECL_THUNK0(StringView, Buffer, getName, const)
 145 DECL_THUNK0(bool, Buffer, isInUse, const)
 146
 147
 148 ALURE_API const char *GetSampleTypeName(SampleType type)
 149 {
 150     switch(type)
 151     {
 152         case SampleType::UInt8: return "Unsigned 8-bit";
 153         case SampleType::Int16: return "Signed 16-bit";
 154         case SampleType::Float32: return "32-bit float";
 155         case SampleType::Mulaw: return "Mulaw";
 156     }
 157     throw std::runtime_error("Invalid type");
 158 }
 159
 160 ALURE_API const char *GetChannelConfigName(ChannelConfig cfg)
 161 {
 162     switch(cfg)
 163     {
 164         case ChannelConfig::Mono: return "Mono";
 165         case ChannelConfig::Stereo: return "Stereo";
 166         case ChannelConfig::Rear: return "Rear";
 167         case ChannelConfig::Quad: return "Quadrophonic";
 168         case ChannelConfig::X51: return "5.1 Surround";
 169         case ChannelConfig::X61: return "6.1 Surround";
 170         case ChannelConfig::X71: return "7.1 Surround";
 171         case ChannelConfig::BFormat2D: return "B-Format 2D";
 172         case ChannelConfig::BFormat3D: return "B-Format 3D";
 173     }
 174     throw std::runtime_error("Invalid config");
 175 }
 176
 177
 178 ALURE_API ALuint FramesToBytes(ALuint frames, ChannelConfig chans, SampleType type)
 179 {
 180     ALuint size = frames;
 181     switch(chans)
 182     {
 183         case ChannelConfig::Mono: size *= 1; break;
 184         case ChannelConfig::Stereo: size *= 2; break;
 185         case ChannelConfig::Rear: size *= 2; break;
 186         case ChannelConfig::Quad: size *= 4; break;
 187         case ChannelConfig::X51: size *= 6; break;
 188         case ChannelConfig::X61: size *= 7; break;
 189         case ChannelConfig::X71: size *= 8; break;
 190         case ChannelConfig::BFormat2D: size *= 3; break;
 191         case ChannelConfig::BFormat3D: size *= 4; break;
 192     }
 193     switch(type)
 194     {
 195         case SampleType::UInt8: size *= 1; break;
 196         case SampleType::Int16: size *= 2; break;
 197         case SampleType::Float32: size *= 4; break;
 198         case SampleType::Mulaw: size *= 1; break;
 199     }
 200
 201     return size;
 202 }
 203
 204 ALURE_API ALuint BytesToFrames(ALuint bytes, ChannelConfig chans, SampleType type)
 205 {
 206     return bytes / FramesToBytes(1, chans, type);
 207 }
 208
 209
 210 ALenum GetFormat(ChannelConfig chans, SampleType type)
 211 {
 212 #define RETURN_FMT(x) do {                \
 213     ALenum fmt = alGetEnumValue(x);       \
 214     if(fmt != AL_NONE && fmt != -1)       \
 215         return fmt;                       \
 216 } while(0)
 217     if(type == SampleType::UInt8)
 218     {
 219         if(chans == ChannelConfig::Mono) return AL_FORMAT_MONO8;
 220         if(chans == ChannelConfig::Stereo) return AL_FORMAT_STEREO8;
 221         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_MCFORMATS))
 222         {
 223             if(chans == ChannelConfig::Rear) RETURN_FMT("AL_FORMAT_REAR8");
 224             if(chans == ChannelConfig::Quad) RETURN_FMT("AL_FORMAT_QUAD8");
 225             if(chans == ChannelConfig::X51) RETURN_FMT("AL_FORMAT_51CHN8");
 226             if(chans == ChannelConfig::X61) RETURN_FMT("AL_FORMAT_61CHN8");
 227             if(chans == ChannelConfig::X71) RETURN_FMT("AL_FORMAT_71CHN8");
 228         }
 229         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_BFORMAT))
 230         {
 231             if(chans == ChannelConfig::BFormat2D) RETURN_FMT("AL_FORMAT_BFORMAT2D_8");
 232             if(chans == ChannelConfig::BFormat3D) RETURN_FMT("AL_FORMAT_BFORMAT3D_8");
 233         }
 234     }
 235     else if(type == SampleType::Int16)
 236     {
 237         if(chans == ChannelConfig::Mono) return AL_FORMAT_MONO16;
 238         if(chans == ChannelConfig::Stereo) return AL_FORMAT_STEREO16;
 239         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_MCFORMATS))
 240         {
 241             if(chans == ChannelConfig::Rear) RETURN_FMT("AL_FORMAT_REAR16");
 242             if(chans == ChannelConfig::Quad) RETURN_FMT("AL_FORMAT_QUAD16");
 243             if(chans == ChannelConfig::X51) RETURN_FMT("AL_FORMAT_51CHN16");
 244             if(chans == ChannelConfig::X61) RETURN_FMT("AL_FORMAT_61CHN16");
 245             if(chans == ChannelConfig::X71) RETURN_FMT("AL_FORMAT_71CHN16");
 246         }
 247         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_BFORMAT))
 248         {
 249             if(chans == ChannelConfig::BFormat2D) RETURN_FMT("AL_FORMAT_BFORMAT2D_16");
 250             if(chans == ChannelConfig::BFormat3D) RETURN_FMT("AL_FORMAT_BFORMAT3D_16");
 251         }
 252     }
 253     else if(type == SampleType::Float32 && ContextImpl::GetCurrent()->hasExtension(AL::EXT_FLOAT32))
 254     {
 255         if(chans == ChannelConfig::Mono) return AL_FORMAT_MONO_FLOAT32;
 256         if(chans == ChannelConfig::Stereo) return AL_FORMAT_STEREO_FLOAT32;
 257         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_MCFORMATS))
 258         {
 259             if(chans == ChannelConfig::Rear) RETURN_FMT("AL_FORMAT_REAR32");
 260             if(chans == ChannelConfig::Quad) RETURN_FMT("AL_FORMAT_QUAD32");
 261             if(chans == ChannelConfig::X51) RETURN_FMT("AL_FORMAT_51CHN32");
 262             if(chans == ChannelConfig::X61) RETURN_FMT("AL_FORMAT_61CHN32");
 263             if(chans == ChannelConfig::X71) RETURN_FMT("AL_FORMAT_71CHN32");
 264         }
 265         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_BFORMAT))
 266         {
 267             if(chans == ChannelConfig::BFormat2D) RETURN_FMT("AL_FORMAT_BFORMAT2D_FLOAT32");
 268             if(chans == ChannelConfig::BFormat3D) RETURN_FMT("AL_FORMAT_BFORMAT3D_FLOAT32");
 269         }
 270     }
 271     else if(type == SampleType::Mulaw && ContextImpl::GetCurrent()->hasExtension(AL::EXT_MULAW))
 272     {
 273         if(chans == ChannelConfig::Mono) return AL_FORMAT_MONO_MULAW;
 274         if(chans == ChannelConfig::Stereo) return AL_FORMAT_STEREO_MULAW;
 275         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_MULAW_MCFORMATS))
 276         {
 277             if(chans == ChannelConfig::Rear) RETURN_FMT("AL_FORMAT_REAR_MULAW");
 278             if(chans == ChannelConfig::Quad) RETURN_FMT("AL_FORMAT_QUAD_MULAW");
 279             if(chans == ChannelConfig::X51) RETURN_FMT("AL_FORMAT_51CHN_MULAW");
 280             if(chans == ChannelConfig::X61) RETURN_FMT("AL_FORMAT_61CHN_MULAW");
 281             if(chans == ChannelConfig::X71) RETURN_FMT("AL_FORMAT_71CHN_MULAW");
 282         }
 283         if(ContextImpl::GetCurrent()->hasExtension(AL::EXT_MULAW_BFORMAT))
 284         {
 285             if(chans == ChannelConfig::BFormat2D) RETURN_FMT("AL_FORMAT_BFORMAT2D_MULAW");
 286             if(chans == ChannelConfig::BFormat3D) RETURN_FMT("AL_FORMAT_BFORMAT3D_MULAW");
 287         }
 288     }
 289 #undef RETURN_FMT
 290
 291     return AL_NONE;
 292 }
 293
 294 }