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Fix yet another division by 0 when parsing WAV data

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Ensure that the size of one sample (including all the channels) is non
zero before dividing by it.
This commit is contained in:
Vadim Zeitlin
2017-12-30 17:45:01 +01:00
parent 932f384c87
commit 61c7cf9a9c
1 changed files with 8 additions and 1 deletions
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9
src/unix/sound.cpp
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@@ -673,6 +673,13 @@ bool wxSound::LoadWAV(const void* data_, size_t length, bool copyData)
waveformat.ulSamplesPerSec * waveformat.uiBlockAlign)
return false;
// We divide by this number below to obtain the number of samples, so it
// definitely can't be 0.
wxUint32 const sampleSize =
waveformat.uiChannels * waveformat.uiBitsPerSample / 8;
if (!sampleSize)
return false;
// get file size from header
wxUint32 chunkSize;
memcpy(&chunkSize, &data[4], 4);
@@ -695,7 +702,7 @@ bool wxSound::LoadWAV(const void* data_, size_t length, bool copyData)
m_data->m_channels = waveformat.uiChannels;
m_data->m_samplingRate = waveformat.ulSamplesPerSec;
m_data->m_bitsPerSample = waveformat.uiBitsPerSample;
m_data->m_samples = ul / (m_data->m_channels * m_data->m_bitsPerSample / 8);
m_data->m_samples = ul / sampleSize;
m_data->m_dataBytes = ul;
if (copyData)