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WaveFile: Fix size check

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`count` is the number of stereo samples to write (where each stereo sample is two shorts), while `BUFFER_SIZE` is the size of the buffer in shorts.  So `count` needs to be multiplied by `2`, not `BUFFER_SIZE`.  Also, when this check was failed, the previous code just clobbered whatever was past the end of the buffer after logging the warning, which corrupted `basename`, eventually resulting in Dolphin crashing.

This affected Datel's Wii-compatible Action Replay, which uses a block size of 2298, or 18384 stereo samples, which is 36768 shorts, which is bigger than the buffer size of 32768. (However, the previous commit means that only one block is transfered at a time, eliminating this issue; fixing the bounds check is just a general safety thing instead of an actual bugfix now.)
This commit is contained in:
Pokechu22 2022-06-11 11:40:38 -07:00
parent 2a83b17ffb
commit 6de55e416b
1 changed files with 7 additions and 1 deletions
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8
Source/Core/AudioCommon/WaveFile.cpp
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@ -119,10 +119,16 @@ void WaveFileWriter::AddStereoSamplesBE(const short* sample_data, u32 count,
u32 sample_rate_divisor, int l_volume, int r_volume)
{
if (!file)
{
ERROR_LOG_FMT(AUDIO, "WaveFileWriter - file not open.");
return;
}
if (count > BUFFER_SIZE * 2)
if (count * 2 > BUFFER_SIZE)
{
ERROR_LOG_FMT(AUDIO, "WaveFileWriter - buffer too small (count = {}).", count);
return;
}
if (skip_silence)
{