In most cases it work good. For example, I compress 3D mesh. Almost all models compressdecompress good. But 2 or 3 models can give error when program try decompress it. It decompress good, but error when I free memory
// how I read my files
u8* compressed_v = nullptr;
u8* compressed_i = nullptr;
if(!meshhead.m_dataComressSize_i)
{
YY_PRINT_FAILED;
return nullptr;
}
if(!meshhead.m_dataComressSize_v)
{
YY_PRINT_FAILED;
return nullptr;
}
compressed_v = (u8*)yyMemAlloc(meshhead.m_dataComressSize_v);
compressed_i = (u8*)yyMemAlloc(meshhead.m_dataComressSize_i);
in.read((char*)compressed_v, meshhead.m_dataComressSize_v);
in.read((char*)compressed_i, meshhead.m_dataComressSize_i);
u32 outsize = 0;
new_mesh.m_data->m_vertices = yyDecompressData(compressed_v, meshhead.m_dataComressSize_v, outsize, yyCompressType::ZStd);
new_mesh.m_data->m_indices = (u8*)yyDecompressData(compressed_i, meshhead.m_dataComressSize_i, outsize, yyCompressType::ZStd);
...
yyMemFree(compressed_v);
yyMemFree(compressed_i); // ERROR HERE
yyMemAlloc
and yyMemFree
it's just malloc
and free
from mylib.dll
Now ZStd code. Please check.
u8* Engine::compressData_zstd( u8* in_data, u32 in_data_size, u32& out_data_size)
{
u8* out_data = (u8*)yyMemAlloc(in_data_size); // malloc
if( !out_data )
{
YY_PRINT_FAILED;
return nullptr;
}
auto compressBound = ZSTD_compressBound(in_data_size);
size_t const cSize = ZSTD_compressCCtx( m_cctx, out_data, compressBound, in_data, in_data_size, 1);
if( ZSTD_isError(cSize) )
{
yyMemFree(out_data); // free
return nullptr;
}
//yyMemRealloc(out_data,(u32)cSize); // this give errors so I removed it
out_data_size = (u32)cSize;
return out_data;
}
u8* Engine::decompressData_zstd( u8* in_data, u32 in_data_size, u32& out_data_size)
{
unsigned long long const rSize = ZSTD_getFrameContentSize(in_data, in_data_size);
u8* out_data = (u8*)yyMemAlloc((u32)rSize);
if( !out_data )
{
YY_PRINT_FAILED;
return nullptr;
}
size_t const dSize = ZSTD_decompress(out_data, (size_t)rSize, in_data, in_data_size);
out_data_size = (u32)dSize;
return out_data;
}
Or maybe ZStd code is good, and problem somewhere else?
It looks like problem in yyMemAlloc
and yyMemFree
but it just malloc
and free
and I use it everywhere in different modules (.exe and many .dll) and all ok.
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