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[c-host] more windows basics and ivshmem pointer init

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This commit is contained in:
Geoffrey McRae 2019-02-28 20:50:22 +11:00
parent 6894ed7d5c
commit d881df916e
5 changed files with 109 additions and 21 deletions
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2
c-host/Makefile
View File

@ -13,7 +13,7 @@ OBJS = app.o
# if windows
ifdef OS
CC = gcc.exe
LDFLAGS = -L./windows/dll
LDFLAGS = -L./windows/dll -mwindows
LIBS += -lsetupapi
OBJS += windows/platform.o
OBJS += windows/windebug.o

62
c-host/app.c
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@ -20,20 +20,61 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "app.h"
#include <stdio.h>
#include <inttypes.h>
#include "debug.h"
#include "capture/interfaces.h"
#include "KVMFR.h"
#define ALIGN_DN(x) ((uintptr_t)(x) & ~0x7F)
#define ALIGN_UP(x) ALIGN_DN(x + 0x7F)
#define MAX_FRAMES 2
struct app
{
KVMFRHeader * shmHeader;
uint8_t * cursorData;
unsigned int cursorDataSize;
unsigned int cursorOffset;
uint8_t * frames;
unsigned int frameSize;
uint8_t * frame[MAX_FRAMES];
unsigned int frameOffset[MAX_FRAMES];
};
static struct app app;
int app_main()
{
unsigned int shmemSize = os_shmemSize();
void * shmemMap = NULL;
uint8_t * shmemMap = NULL;
int exitcode = 0;
DEBUG_INFO("IVSHMEM Size : %u MiB", shmemSize / 1048576);
if (!os_shmemMmap(&shmemMap) || !shmemMap)
if (!os_shmemMmap((void **)&shmemMap) || !shmemMap)
{
DEBUG_ERROR("Failed to map the shared memory");
return -1;
}
DEBUG_INFO("IVSHMEM Address : 0x%" PRIXPTR, (uintptr_t)shmemMap);
app.shmHeader = (KVMFRHeader *)shmemMap;
app.cursorData = (uint8_t *)ALIGN_UP(shmemMap + sizeof(KVMFRHeader));
app.cursorDataSize = 1048576; // 1MB fixed for cursor size, should be more then enough
app.cursorOffset = app.cursorData - shmemMap;
app.frames = (uint8_t *)ALIGN_UP(app.cursorData + app.cursorDataSize);
app.frameSize = ALIGN_DN((shmemSize - (app.frames - shmemMap)) / MAX_FRAMES);
DEBUG_INFO("Max Cursor Size : %u MiB" , app.cursorDataSize / 1048576);
DEBUG_INFO("Max Frame Size : %u MiB" , app.frameSize / 1048576);
DEBUG_INFO("Cursor : 0x%" PRIXPTR " (0x%08x)", (uintptr_t)app.cursorData, app.cursorOffset);
for (int i = 0; i < MAX_FRAMES; ++i)
{
app.frame [i] = app.frames + i * app.frameSize;
app.frameOffset[i] = app.frame[i] - shmemMap;
DEBUG_INFO("Frame %d : 0x%" PRIXPTR " (0x%08x)", i, (uintptr_t)app.frame[i], app.frameOffset[i]);
}
struct CaptureInterface * iface = NULL;
for(int i = 0; CaptureInterfaces[i]; ++i)
@ -53,18 +94,29 @@ int app_main()
if (!iface)
{
DEBUG_ERROR("Failed to find a supported capture interface");
return -1;
exitcode = -1;
goto fail;
}
DEBUG_INFO("Using : %s", iface->getName());
const unsigned int maxFrameSize = iface->getMaxFrameSize();
if (maxFrameSize > app.frameSize)
{
DEBUG_ERROR("Maximum frame size of %d bytes excceds maximum space available", maxFrameSize);
exitcode = -1;
goto exit;
}
DEBUG_INFO("Capture Size : %u MiB (%u)", maxFrameSize / 1048576, maxFrameSize);
iface->capture();
iface->capture();
iface->capture();
exit:
iface->deinit();
iface->free();
fail:
os_shmemUnmap();
return 0;
return exitcode;
}

13
c-host/capture/interface.h
View File

@ -33,10 +33,11 @@ CaptureResult;
struct CaptureInterface
{
const char * (*getName)();
bool (*create )();
bool (*init )();
bool (*deinit )();
void (*free )();
CaptureResult (*capture)();
const char * (*getName )();
bool (*create )();
bool (*init )();
bool (*deinit )();
void (*free )();
unsigned int (*getMaxFrameSize)();
CaptureResult (*capture )();
};

41
c-host/windows/capture/dxgi.c
View File

@ -45,6 +45,8 @@ struct iface
unsigned int width;
unsigned int height;
unsigned int pitch;
unsigned int stride;
};
static bool dpiDone = false;
@ -184,9 +186,9 @@ static bool dxgi_init()
DEBUG_INFO("Device Descripion: %ls" , adapterDesc.Description);
DEBUG_INFO("Device Vendor ID : 0x%x" , adapterDesc.VendorId);
DEBUG_INFO("Device Device ID : 0x%x" , adapterDesc.DeviceId);
DEBUG_INFO("Device Video Mem : %u MB", (unsigned)(adapterDesc.DedicatedVideoMemory / 1048576));
DEBUG_INFO("Device Sys Mem : %u MB", (unsigned)(adapterDesc.DedicatedSystemMemory / 1048576));
DEBUG_INFO("Shared Sys Mem : %u MB", (unsigned)(adapterDesc.SharedSystemMemory / 1048576));
DEBUG_INFO("Device Video Mem : %u MiB", (unsigned)(adapterDesc.DedicatedVideoMemory / 1048576));
DEBUG_INFO("Device Sys Mem : %u MiB", (unsigned)(adapterDesc.DedicatedSystemMemory / 1048576));
DEBUG_INFO("Shared Sys Mem : %u MiB", (unsigned)(adapterDesc.SharedSystemMemory / 1048576));
DEBUG_INFO("Feature Level : 0x%x", this->featureLevel);
DEBUG_INFO("Capture Size : %u x %u", this->width, this->height);
@ -294,6 +296,18 @@ static bool dxgi_init()
goto fail_release_output;
}
// map the texture simply to get the pitch and stride
D3D11_MAPPED_SUBRESOURCE mapping;
status = ID3D11DeviceContext_Map(this->deviceContext, (ID3D11Resource *)this->texture, 0, D3D11_MAP_READ, 0, &mapping);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to map the texture", status);
goto fail_release_output;
}
this->pitch = mapping.RowPitch;
this->stride = mapping.RowPitch / 4;
ID3D11DeviceContext_Unmap(this->deviceContext, (ID3D11Resource *)this->texture, 0);
this->factory = factory;
this->adapter = adapter;
this->output = output;
@ -370,6 +384,14 @@ static void dxgi_free()
this = NULL;
}
static unsigned int dxgi_getMaxFrameSize()
{
assert(this);
assert(this->initialized);
return this->height * this->pitch;
}
static CaptureResult dxgi_capture()
{
assert(this);
@ -456,10 +478,11 @@ static CaptureResult dxgi_releaseFrame()
struct CaptureInterface Capture_DXGI =
{
.getName = dxgi_getName,
.create = dxgi_create,
.init = dxgi_init,
.deinit = dxgi_deinit,
.free = dxgi_free,
.capture = dxgi_capture
.getName = dxgi_getName,
.create = dxgi_create,
.init = dxgi_init,
.deinit = dxgi_deinit,
.free = dxgi_free,
.getMaxFrameSize = dxgi_getMaxFrameSize,
.capture = dxgi_capture
};

12
c-host/windows/platform.c
View File

@ -85,6 +85,18 @@ int WINAPI WinMain(HINSTANCE hInstnace, HINSTANCE hPrevInstance, LPSTR lpCmdLine
os_shmemUnmap();
CloseHandle(shmemHandle);
if (result != 0)
{
MessageBoxA(
NULL,
"The Looking Glass host has terminated due to an error.\r\n"
"\r\n"
"For more information run the application in a command prompt.",
"Looking Glass Host",
MB_ICONERROR);
}
return result;
}