in Audio/SoundCommon.cpp [32:487]
bool DirectX::IsValid(_In_ const WAVEFORMATEX* wfx) noexcept
{
if (!wfx)
return false;
if (!wfx->nChannels)
{
DebugTrace("ERROR: Wave format must have at least 1 channel\n");
return false;
}
if (wfx->nChannels > XAUDIO2_MAX_AUDIO_CHANNELS)
{
DebugTrace("ERROR: Wave format must have less than %u channels (%u)\n", XAUDIO2_MAX_AUDIO_CHANNELS, wfx->nChannels);
return false;
}
if (!wfx->nSamplesPerSec)
{
DebugTrace("ERROR: Wave format cannot have a sample rate of 0\n");
return false;
}
if ((wfx->nSamplesPerSec < XAUDIO2_MIN_SAMPLE_RATE)
|| (wfx->nSamplesPerSec > XAUDIO2_MAX_SAMPLE_RATE))
{
DebugTrace("ERROR: Wave format channel count must be in range %u..%u (%u)\n",
XAUDIO2_MIN_SAMPLE_RATE, XAUDIO2_MAX_SAMPLE_RATE, wfx->nSamplesPerSec);
return false;
}
switch (wfx->wFormatTag)
{
case WAVE_FORMAT_PCM:
switch (wfx->wBitsPerSample)
{
case 8:
case 16:
case 24:
case 32:
break;
default:
DebugTrace("ERROR: Wave format integer PCM must have 8, 16, 24, or 32 bits per sample (%u)\n", wfx->wBitsPerSample);
return false;
}
if (wfx->nBlockAlign != (wfx->nChannels * wfx->wBitsPerSample / 8))
{
DebugTrace("ERROR: Wave format integer PCM - nBlockAlign (%u) != nChannels (%u) * wBitsPerSample (%u) / 8\n",
wfx->nBlockAlign, wfx->nChannels, wfx->wBitsPerSample);
return false;
}
if (wfx->nAvgBytesPerSec != (wfx->nSamplesPerSec * wfx->nBlockAlign))
{
DebugTrace("ERROR: Wave format integer PCM - nAvgBytesPerSec (%lu) != nSamplesPerSec (%lu) * nBlockAlign (%u)\n",
wfx->nAvgBytesPerSec, wfx->nSamplesPerSec, wfx->nBlockAlign);
return false;
}
return true;
case WAVE_FORMAT_IEEE_FLOAT:
if (wfx->wBitsPerSample != 32)
{
DebugTrace("ERROR: Wave format float PCM must have 32-bits per sample (%u)\n", wfx->wBitsPerSample);
return false;
}
if (wfx->nBlockAlign != (wfx->nChannels * wfx->wBitsPerSample / 8))
{
DebugTrace("ERROR: Wave format float PCM - nBlockAlign (%u) != nChannels (%u) * wBitsPerSample (%u) / 8\n",
wfx->nBlockAlign, wfx->nChannels, wfx->wBitsPerSample);
return false;
}
if (wfx->nAvgBytesPerSec != (wfx->nSamplesPerSec * wfx->nBlockAlign))
{
DebugTrace("ERROR: Wave format float PCM - nAvgBytesPerSec (%lu) != nSamplesPerSec (%lu) * nBlockAlign (%u)\n",
wfx->nAvgBytesPerSec, wfx->nSamplesPerSec, wfx->nBlockAlign);
return false;
}
return true;
case WAVE_FORMAT_ADPCM:
if ((wfx->nChannels != 1) && (wfx->nChannels != 2))
{
DebugTrace("ERROR: Wave format ADPCM must have 1 or 2 channels (%u)\n", wfx->nChannels);
return false;
}
if (wfx->wBitsPerSample != 4 /*MSADPCM_BITS_PER_SAMPLE*/)
{
DebugTrace("ERROR: Wave format ADPCM must have 4 bits per sample (%u)\n", wfx->wBitsPerSample);
return false;
}
if (wfx->cbSize != 32 /*MSADPCM_FORMAT_EXTRA_BYTES*/)
{
DebugTrace("ERROR: Wave format ADPCM must have cbSize = 32 (%u)\n", wfx->cbSize);
return false;
}
else
{
auto wfadpcm = reinterpret_cast<const ADPCMWAVEFORMAT*>(wfx);
if (wfadpcm->wNumCoef != 7 /*MSADPCM_NUM_COEFFICIENTS*/)
{
DebugTrace("ERROR: Wave format ADPCM must have 7 coefficients (%u)\n", wfadpcm->wNumCoef);
return false;
}
bool valid = true;
for (int j = 0; j < 7 /*MSADPCM_NUM_COEFFICIENTS*/; ++j)
{
// Microsoft ADPCM standard encoding coefficients
static const short g_pAdpcmCoefficients1[] = { 256, 512, 0, 192, 240, 460, 392 };
static const short g_pAdpcmCoefficients2[] = { 0, -256, 0, 64, 0, -208, -232 };
if (wfadpcm->aCoef[j].iCoef1 != g_pAdpcmCoefficients1[j]
|| wfadpcm->aCoef[j].iCoef2 != g_pAdpcmCoefficients2[j])
{
valid = false;
}
}
if (!valid)
{
DebugTrace("ERROR: Wave formt ADPCM found non-standard coefficients\n");
return false;
}
if ((wfadpcm->wSamplesPerBlock < 4 /*MSADPCM_MIN_SAMPLES_PER_BLOCK*/)
|| (wfadpcm->wSamplesPerBlock > 64000 /*MSADPCM_MAX_SAMPLES_PER_BLOCK*/))
{
DebugTrace("ERROR: Wave format ADPCM wSamplesPerBlock must be 4..64000 (%u)\n", wfadpcm->wSamplesPerBlock);
return false;
}
if (wfadpcm->wfx.nChannels == 1 && (wfadpcm->wSamplesPerBlock % 2))
{
DebugTrace("ERROR: Wave format ADPCM mono files must have even wSamplesPerBlock\n");
return false;
}
int nHeaderBytes = 7 /*MSADPCM_HEADER_LENGTH*/ * wfx->nChannels;
int nBitsPerFrame = 4 /*MSADPCM_BITS_PER_SAMPLE*/ * wfx->nChannels;
int nPcmFramesPerBlock = (wfx->nBlockAlign - nHeaderBytes) * 8 / nBitsPerFrame + 2;
if (wfadpcm->wSamplesPerBlock != nPcmFramesPerBlock)
{
DebugTrace("ERROR: Wave format ADPCM %u-channel with nBlockAlign = %u must have wSamplesPerBlock = %d (%u)\n",
wfx->nChannels, wfx->nBlockAlign, nPcmFramesPerBlock, wfadpcm->wSamplesPerBlock);
return false;
}
}
return true;
case WAVE_FORMAT_WMAUDIO2:
case WAVE_FORMAT_WMAUDIO3:
#ifdef DIRECTX_ENABLE_XWMA
if (wfx->wBitsPerSample != 16)
{
DebugTrace("ERROR: Wave format xWMA only supports 16-bit data\n");
return false;
}
if (!wfx->nBlockAlign)
{
DebugTrace("ERROR: Wave format xWMA must have a non-zero nBlockAlign\n");
return false;
}
if (!wfx->nAvgBytesPerSec)
{
DebugTrace("ERROR: Wave format xWMA must have a non-zero nAvgBytesPerSec\n");
return false;
}
return true;
#else
DebugTrace("ERROR: Wave format xWMA not supported by this version of DirectXTK for Audio\n");
return false;
#endif
case 0x166 /* WAVE_FORMAT_XMA2 */:
#ifdef DIRECTX_ENABLE_XMA2
static_assert(WAVE_FORMAT_XMA2 == 0x166, "Unrecognized XMA2 tag");
if (wfx->nBlockAlign != wfx->nChannels * XMA_OUTPUT_SAMPLE_BYTES)
{
DebugTrace("ERROR: Wave format XMA2 - nBlockAlign (%u) != nChannels(%u) * %u\n", wfx->nBlockAlign, wfx->nChannels, XMA_OUTPUT_SAMPLE_BYTES);
return false;
}
if (wfx->wBitsPerSample != XMA_OUTPUT_SAMPLE_BITS)
{
DebugTrace("ERROR: Wave format XMA2 wBitsPerSample (%u) should be %u\n", wfx->wBitsPerSample, XMA_OUTPUT_SAMPLE_BITS);
return false;
}
if (wfx->cbSize != (sizeof(XMA2WAVEFORMATEX) - sizeof(WAVEFORMATEX)))
{
DebugTrace("ERROR: Wave format XMA2 - cbSize must be %zu (%u)\n", (sizeof(XMA2WAVEFORMATEX) - sizeof(WAVEFORMATEX)), wfx->cbSize);
return false;
}
else
{
auto xmaFmt = reinterpret_cast<const XMA2WAVEFORMATEX*>(wfx);
if (xmaFmt->EncoderVersion < 3)
{
DebugTrace("ERROR: Wave format XMA2 encoder version (%u) - 3 or higher is required\n", xmaFmt->EncoderVersion);
return false;
}
if (!xmaFmt->BlockCount)
{
DebugTrace("ERROR: Wave format XMA2 BlockCount must be non-zero\n");
return false;
}
if (!xmaFmt->BytesPerBlock || (xmaFmt->BytesPerBlock > XMA_READBUFFER_MAX_BYTES))
{
DebugTrace("ERROR: Wave format XMA2 BytesPerBlock (%u) is invalid\n", xmaFmt->BytesPerBlock);
return false;
}
if (xmaFmt->ChannelMask)
{
auto channelBits = ChannelsSpecifiedInMask(xmaFmt->ChannelMask);
if (channelBits != wfx->nChannels)
{
DebugTrace("ERROR: Wave format XMA2 - nChannels=%u but ChannelMask (%08X) has %u bits set\n",
xmaFmt->ChannelMask, wfx->nChannels, channelBits);
return false;
}
}
if (xmaFmt->NumStreams != ((wfx->nChannels + 1) / 2))
{
DebugTrace("ERROR: Wave format XMA2 - NumStreams (%u) != ( nChannels(%u) + 1 ) / 2\n",
xmaFmt->NumStreams, wfx->nChannels);
return false;
}
if ((xmaFmt->PlayBegin + xmaFmt->PlayLength) > xmaFmt->SamplesEncoded)
{
DebugTrace("ERROR: Wave format XMA2 play region too large (%u + %u > %u)\n",
xmaFmt->PlayBegin, xmaFmt->PlayLength, xmaFmt->SamplesEncoded);
return false;
}
if ((xmaFmt->LoopBegin + xmaFmt->LoopLength) > xmaFmt->SamplesEncoded)
{
DebugTrace("ERROR: Wave format XMA2 loop region too large (%u + %u > %u)\n",
xmaFmt->LoopBegin, xmaFmt->LoopLength, xmaFmt->SamplesEncoded);
return false;
}
}
return true;
#else
DebugTrace("ERROR: Wave format XMA2 not supported by this version of DirectXTK for Audio\n");
return false;
#endif
case WAVE_FORMAT_EXTENSIBLE:
if (wfx->cbSize < (sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)))
{
DebugTrace("ERROR: Wave format WAVE_FORMAT_EXTENSIBLE - cbSize must be %zu (%u)\n",
(sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)), wfx->cbSize);
return false;
}
else
{
static const GUID s_wfexBase = { 0x00000000, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 } };
auto wfex = reinterpret_cast<const WAVEFORMATEXTENSIBLE*>(wfx);
if (memcmp(reinterpret_cast<const BYTE*>(&wfex->SubFormat) + sizeof(DWORD),
reinterpret_cast<const BYTE*>(&s_wfexBase) + sizeof(DWORD), sizeof(GUID) - sizeof(DWORD)) != 0)
{
DebugTrace("ERROR: Wave format WAVEFORMATEXTENSIBLE encountered with unknown GUID ({%8.8lX-%4.4X-%4.4X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X})\n",
wfex->SubFormat.Data1, wfex->SubFormat.Data2, wfex->SubFormat.Data3,
wfex->SubFormat.Data4[0], wfex->SubFormat.Data4[1], wfex->SubFormat.Data4[2], wfex->SubFormat.Data4[3],
wfex->SubFormat.Data4[4], wfex->SubFormat.Data4[5], wfex->SubFormat.Data4[6], wfex->SubFormat.Data4[7]);
return false;
}
switch (wfex->SubFormat.Data1)
{
case WAVE_FORMAT_PCM:
switch (wfx->wBitsPerSample)
{
case 8:
case 16:
case 24:
case 32:
break;
default:
DebugTrace("ERROR: Wave format integer PCM must have 8, 16, 24, or 32 bits per sample (%u)\n",
wfx->wBitsPerSample);
return false;
}
switch (wfex->Samples.wValidBitsPerSample)
{
case 0:
case 8:
case 16:
case 20:
case 24:
case 32:
break;
default:
DebugTrace("ERROR: Wave format integer PCM must have 8, 16, 20, 24, or 32 valid bits per sample (%u)\n",
wfex->Samples.wValidBitsPerSample);
return false;
}
if (wfex->Samples.wValidBitsPerSample
&& (wfex->Samples.wValidBitsPerSample > wfx->wBitsPerSample))
{
DebugTrace("ERROR: Wave format ingter PCM wValidBitsPerSample (%u) is greater than wBitsPerSample (%u)\n",
wfex->Samples.wValidBitsPerSample, wfx->wBitsPerSample);
return false;
}
if (wfx->nBlockAlign != (wfx->nChannels * wfx->wBitsPerSample / 8))
{
DebugTrace("ERROR: Wave format integer PCM - nBlockAlign (%u) != nChannels (%u) * wBitsPerSample (%u) / 8\n",
wfx->nBlockAlign, wfx->nChannels, wfx->wBitsPerSample);
return false;
}
if (wfx->nAvgBytesPerSec != (wfx->nSamplesPerSec * wfx->nBlockAlign))
{
DebugTrace("ERROR: Wave format integer PCM - nAvgBytesPerSec (%lu) != nSamplesPerSec (%lu) * nBlockAlign (%u)\n",
wfx->nAvgBytesPerSec, wfx->nSamplesPerSec, wfx->nBlockAlign);
return false;
}
break;
case WAVE_FORMAT_IEEE_FLOAT:
if (wfx->wBitsPerSample != 32)
{
DebugTrace("ERROR: Wave format float PCM must have 32-bits per sample (%u)\n", wfx->wBitsPerSample);
return false;
}
switch (wfex->Samples.wValidBitsPerSample)
{
case 0:
case 32:
break;
default:
DebugTrace("ERROR: Wave format float PCM must have 32 valid bits per sample (%u)\n",
wfex->Samples.wValidBitsPerSample);
return false;
}
if (wfx->nBlockAlign != (wfx->nChannels * wfx->wBitsPerSample / 8))
{
DebugTrace("ERROR: Wave format float PCM - nBlockAlign (%u) != nChannels (%u) * wBitsPerSample (%u) / 8\n",
wfx->nBlockAlign, wfx->nChannels, wfx->wBitsPerSample);
return false;
}
if (wfx->nAvgBytesPerSec != (wfx->nSamplesPerSec * wfx->nBlockAlign))
{
DebugTrace("ERROR: Wave format float PCM - nAvgBytesPerSec (%lu) != nSamplesPerSec (%lu) * nBlockAlign (%u)\n",
wfx->nAvgBytesPerSec, wfx->nSamplesPerSec, wfx->nBlockAlign);
return false;
}
break;
case WAVE_FORMAT_ADPCM:
DebugTrace("ERROR: Wave format ADPCM is not supported as a WAVEFORMATEXTENSIBLE\n");
return false;
case WAVE_FORMAT_WMAUDIO2:
case WAVE_FORMAT_WMAUDIO3:
#ifdef DIRECTX_ENABLE_XWMA
if (wfx->wBitsPerSample != 16)
{
DebugTrace("ERROR: Wave format xWMA only supports 16-bit data\n");
return false;
}
if (!wfx->nBlockAlign)
{
DebugTrace("ERROR: Wave format xWMA must have a non-zero nBlockAlign\n");
return false;
}
if (!wfx->nAvgBytesPerSec)
{
DebugTrace("ERROR: Wave format xWMA must have a non-zero nAvgBytesPerSec\n");
return false;
}
break;
#else
DebugTrace("ERROR: Wave format xWMA not supported by this version of DirectXTK for Audio\n");
return false;
#endif
case 0x166 /* WAVE_FORMAT_XMA2 */:
DebugTrace("ERROR: Wave format XMA2 is not supported as a WAVEFORMATEXTENSIBLE\n");
return false;
default:
DebugTrace("ERROR: Unknown WAVEFORMATEXTENSIBLE format tag (%u)\n", wfex->SubFormat.Data1);
return false;
}
if (wfex->dwChannelMask)
{
auto channelBits = ChannelsSpecifiedInMask(wfex->dwChannelMask);
if (channelBits != wfx->nChannels)
{
DebugTrace("ERROR: WAVEFORMATEXTENSIBLE: nChannels=%u but ChannelMask has %u bits set\n",
wfx->nChannels, channelBits);
return false;
}
}
return true;
}
default:
DebugTrace("ERROR: Unknown WAVEFORMATEX format tag (%u)\n", wfx->wFormatTag);
return false;
}
}