int xcrush_decompress(XCRUSH_CONTEXT* xcrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags)
{
int status = 0;
UINT32 DstSize = 0;
BYTE* pDstData = NULL;
BYTE Level1ComprFlags;
BYTE Level2ComprFlags;
if (SrcSize < 2)
return -1;
Level1ComprFlags = pSrcData[0];
Level2ComprFlags = pSrcData[1];
pSrcData += 2;
SrcSize -= 2;
if (Level2ComprFlags & PACKET_COMPRESSED)
{
status = mppc_decompress(xcrush->mppc, pSrcData, SrcSize, &pDstData, &DstSize, Level2ComprFlags);
if (status < 0)
return status;
}
else
{
pDstData = pSrcData;
DstSize = SrcSize;
}
status = xcrush_decompress_l1(xcrush, pDstData, DstSize, ppDstData, pDstSize, Level1ComprFlags);
return status;
}
int bulk_decompress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags)
{
UINT32 type;
int status = -1;
rdpMetrics* metrics;
UINT32 CompressedBytes;
UINT32 UncompressedBytes;
double CompressionRatio;
metrics = bulk->context->metrics;
bulk_compression_max_size(bulk);
type = flags & BULK_COMPRESSION_TYPE_MASK;
if (flags & BULK_COMPRESSION_FLAGS_MASK)
{
switch (type)
{
case PACKET_COMPR_TYPE_8K:
mppc_set_compression_level(bulk->mppcRecv, 0);
status = mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_64K:
mppc_set_compression_level(bulk->mppcRecv, 1);
status = mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP6:
status = ncrush_decompress(bulk->ncrushRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP61:
status = xcrush_decompress(bulk->xcrushRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP8:
status = -1;
break;
}
}
else
{
*ppDstData = pSrcData;
*pDstSize = SrcSize;
status = 0;
}
if (status >= 0)
{
CompressedBytes = SrcSize;
UncompressedBytes = *pDstSize;
CompressionRatio = metrics_write_bytes(metrics, UncompressedBytes, CompressedBytes);
#ifdef WITH_BULK_DEBUG
{
DEBUG_MSG("Decompress Type: %d Flags: %s (0x%04X) Compression Ratio: %f (%d / %d), Total: %f (%u / %u)\n",
type, bulk_get_compression_flags_string(flags), flags,
CompressionRatio, CompressedBytes, UncompressedBytes,
metrics->TotalCompressionRatio, (UINT32) metrics->TotalCompressedBytes,
(UINT32) metrics->TotalUncompressedBytes);
}
#endif
}
else
{
DEBUG_WARN("Decompression failure!\n");
}
return status;
}
int bulk_decompress(rdpBulk* bulk, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags)
{
UINT32 type;
int status = -1;
UINT32 CompressedBytes;
UINT32 UncompressedBytes;
bulk_compression_max_size(bulk);
type = flags & BULK_COMPRESSION_TYPE_MASK;
if (flags & BULK_COMPRESSION_FLAGS_MASK)
{
switch (type)
{
case PACKET_COMPR_TYPE_8K:
mppc_set_compression_level(bulk->mppcRecv, 0);
status = mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_64K:
mppc_set_compression_level(bulk->mppcRecv, 1);
status = mppc_decompress(bulk->mppcRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP6:
status = ncrush_decompress(bulk->ncrushRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP61:
status = xcrush_decompress(bulk->xcrushRecv, pSrcData, SrcSize, ppDstData, pDstSize, flags);
break;
case PACKET_COMPR_TYPE_RDP8:
status = -1;
break;
}
}
else
{
*ppDstData = pSrcData;
*pDstSize = SrcSize;
status = 0;
}
if (status >= 0)
{
CompressedBytes = SrcSize;
UncompressedBytes = *pDstSize;
bulk->TotalUncompressedBytes += UncompressedBytes;
bulk->TotalCompressedBytes += CompressedBytes;
#ifdef WITH_BULK_DEBUG
{
double CompressionRatio;
double TotalCompressionRatio;
CompressionRatio = ((double) CompressedBytes) / ((double) UncompressedBytes);
TotalCompressionRatio = ((double) bulk->TotalCompressedBytes) / ((double) bulk->TotalUncompressedBytes);
printf("Decompress Type: %d Flags: %s (0x%04X) Compression Ratio: %f (%d / %d), Total: %f (%d / %d)\n",
type, bulk_get_compression_flags_string(flags), flags,
CompressionRatio, CompressedBytes, UncompressedBytes,
TotalCompressionRatio, bulk->TotalCompressedBytes, bulk->TotalUncompressedBytes);
}
#endif
}
else
{
fprintf(stderr, "Decompression failure!\n");
}
return status;
}
