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[host] adjusted frame and cursor offset calculations

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This commit is contained in:
Geoffrey McRae 2017-12-29 06:10:50 +11:00
parent 40bfdcdf8c
commit f6f4c8070a
1 changed files with 32 additions and 12 deletions
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44
host/Service.cpp
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@ -75,7 +75,17 @@ bool Service::Initialize(ICapture * captureDevice)
}
if (!InitPointers())
{
DeInitialize();
return false;
}
if (m_capture->GetMaxFrameSize() > m_frameSize)
{
DEBUG_ERROR("Maximum frame size of %zu bytes excceds maximum space available", m_capture->GetMaxFrameSize());
DeInitialize();
return false;
}
m_timer = CreateWaitableTimer(NULL, TRUE, NULL);
if (!m_timer)
@ -96,25 +106,29 @@ bool Service::Initialize(ICapture * captureDevice)
return true;
}
#define ALIGN_DN(x) ((uintptr_t)(x) & ~0x7F)
#define ALIGN_UP(x) ALIGN_DN(x + 0x7F)
bool Service::InitPointers()
{
m_shmHeader = reinterpret_cast<KVMFRHeader *>(m_memory);
m_cursorData = (uint8_t *)(((uintptr_t)m_memory + sizeof(KVMFRHeader *) + 0x7F) & ~0x7F);
m_cursorDataSize = (128 * 128 * 4);
m_frame[0] = m_cursorData + (128*128*4);
m_frameSize = ((m_ivshmem->GetSize() - (m_frame[0] - m_memory)) & ~0x7F) >> 1;
m_frame[1] = m_frame[0] + m_frameSize;
m_cursorData = (uint8_t *)ALIGN_UP(m_memory + sizeof(KVMFRHeader));
m_cursorDataSize = 1048576; // 1MB fixed for cursor size, should be more then enough
m_frame[0] = (uint8_t *)ALIGN_UP(m_cursorData + m_cursorDataSize);
m_frameSize = ALIGN_DN((m_ivshmem->GetSize() - (m_frame[0] - m_memory)) >> 1);
m_frame[1] = (uint8_t *)ALIGN_DN(m_frame[0] + m_frameSize);
m_cursorOffset = m_cursorData - m_memory;
m_dataOffset[0] = m_frame[0] - m_memory;
m_dataOffset[1] = m_frame[1] - m_memory;
if (m_capture->GetMaxFrameSize() > m_frameSize)
{
DEBUG_ERROR("Frame can exceed buffer size!");
DeInitialize();
return false;
}
DEBUG_INFO("Total Available : %3I64u MB", m_ivshmem->GetSize() / 1024 / 1024);
DEBUG_INFO("Max Cursor Size : %3I64u MB", m_cursorDataSize / 1024 / 1024);
DEBUG_INFO("Max Frame Size : %3I64u MB", m_frameSize / 1024 / 1024);
DEBUG_INFO("Cursor : %p (0x%08I64x)", m_cursorData, m_cursorOffset );
DEBUG_INFO("Frame 1 : %p (0x%08I64x)", m_frame[0] , m_dataOffset[0]);
DEBUG_INFO("Frame 2 : %p (0x%08I64x)", m_frame[1] , m_dataOffset[1]);
return true;
}
@ -217,11 +231,17 @@ bool Service::Process()
Sleep(100);
}
if (!m_capture->ReInitialize() || !InitPointers())
if (!m_capture->ReInitialize())
{
DEBUG_ERROR("ReInitialize Failed");
return false;
}
if (m_capture->GetMaxFrameSize() > m_frameSize)
{
DEBUG_ERROR("Maximum frame size of %zd bytes excceds maximum space available", m_capture->GetMaxFrameSize());
return false;
}
continue;
}