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https://github.com/gnif/LookingGlass.git
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[c-host] app: add initial frame capture support
This commit is contained in:
Geoffrey McRae
parent
7285f9e9ad
commit
61108ba760
144
c-host/app.c
144
c-host/app.c
@ -22,6 +22,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#include <stdio.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "debug.h"
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#include "capture/interfaces.h"
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#include "KVMFR.h"
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@ -33,9 +34,11 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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struct app
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{
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KVMFRHeader * shmHeader;
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uint8_t * cursorData;
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unsigned int cursorDataSize;
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unsigned int cursorOffset;
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uint8_t * pointerData;
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unsigned int pointerDataSize;
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unsigned int pointerOffset;
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CaptureInterface * iface;
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uint8_t * frames;
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unsigned int frameSize;
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@ -43,18 +46,32 @@ struct app
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unsigned int frameOffset[MAX_FRAMES];
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bool running;
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osThreadHandle * cursorThread;
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osEventHandle * updateEvent;
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osThreadHandle * pointerThread;
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osEventHandle * pointerEvent;
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osThreadHandle * frameThread;
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osEventHandle * frameEvent;
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};
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static struct app app;
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static int cursorThread(void * opaque)
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static int pointerThread(void * opaque)
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{
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DEBUG_INFO("Cursor thread started");
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while(app.running)
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usleep(10000);
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{
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if (!os_waitEvent(app.pointerEvent) || !app.running)
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break;
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#if 0
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CapturePointer pointer;
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pointer->data = app.pointerData;
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if (!app.iface->getPointer(&pointer))
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DEBUG_ERROR("Failed to get the pointer");
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os_signalEvent(app.updateEvent);
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#endif
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}
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DEBUG_INFO("Cursor thread stopped");
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return 0;
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@ -64,9 +81,21 @@ static int frameThread(void * opaque)
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{
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DEBUG_INFO("Frame thread started");
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int frameIndex = 0;
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while(app.running)
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usleep(10000);
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{
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if (!os_waitEvent(app.frameEvent) || !app.running)
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break;
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CaptureFrame frame;
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frame.data = app.frame[frameIndex];
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if (!app.iface->getFrame(&frame))
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DEBUG_ERROR("Failed to get the frame");
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os_signalEvent(app.updateEvent);
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if (++frameIndex == MAX_FRAMES)
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frameIndex = 0;
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}
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DEBUG_INFO("Frame thread stopped");
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return 0;
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}
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@ -74,9 +103,9 @@ static int frameThread(void * opaque)
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bool startThreads()
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{
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app.running = true;
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if (!os_createThread("CursorThread", cursorThread, NULL, &app.cursorThread))
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if (!os_createThread("CursorThread", pointerThread, NULL, &app.pointerThread))
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{
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DEBUG_ERROR("Failed to create the cursor thread");
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DEBUG_ERROR("Failed to create the pointer thread");
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return false;
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}
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@ -94,6 +123,9 @@ bool stopThreads()
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bool ok = true;
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app.running = false;
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os_signalEvent(app.frameEvent );
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os_signalEvent(app.pointerEvent);
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if (app.frameThread && !os_joinThread(app.frameThread, NULL))
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{
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DEBUG_WARN("Failed to join the frame thread");
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@ -101,21 +133,21 @@ bool stopThreads()
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}
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app.frameThread = NULL;
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if (app.cursorThread && !os_joinThread(app.cursorThread, NULL))
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if (app.pointerThread && !os_joinThread(app.pointerThread, NULL))
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{
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DEBUG_WARN("Failed to join the cursor thread");
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DEBUG_WARN("Failed to join the pointer thread");
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ok = false;
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}
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app.cursorThread = NULL;
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app.pointerThread = NULL;
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return ok;
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}
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static bool captureStart(struct CaptureInterface * iface)
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static bool captureStart()
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{
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DEBUG_INFO("Using : %s", iface->getName());
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DEBUG_INFO("Using : %s", app.iface->getName());
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const unsigned int maxFrameSize = iface->getMaxFrameSize();
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const unsigned int maxFrameSize = app.iface->getMaxFrameSize();
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if (maxFrameSize > app.frameSize)
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{
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DEBUG_ERROR("Maximum frame size of %d bytes excceds maximum space available", maxFrameSize);
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@ -142,15 +174,15 @@ int app_main()
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DEBUG_INFO("IVSHMEM Address : 0x%" PRIXPTR, (uintptr_t)shmemMap);
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app.shmHeader = (KVMFRHeader *)shmemMap;
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app.cursorData = (uint8_t *)ALIGN_UP(shmemMap + sizeof(KVMFRHeader));
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app.cursorDataSize = 1048576; // 1MB fixed for cursor size, should be more then enough
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app.cursorOffset = app.cursorData - shmemMap;
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app.frames = (uint8_t *)ALIGN_UP(app.cursorData + app.cursorDataSize);
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app.pointerData = (uint8_t *)ALIGN_UP(shmemMap + sizeof(KVMFRHeader));
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app.pointerDataSize = 1048576; // 1MB fixed for pointer size, should be more then enough
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app.pointerOffset = app.pointerData - shmemMap;
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app.frames = (uint8_t *)ALIGN_UP(app.pointerData + app.pointerDataSize);
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app.frameSize = ALIGN_DN((shmemSize - (app.frames - shmemMap)) / MAX_FRAMES);
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DEBUG_INFO("Max Cursor Size : %u MiB" , app.cursorDataSize / 1048576);
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DEBUG_INFO("Max Cursor Size : %u MiB" , app.pointerDataSize / 1048576);
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DEBUG_INFO("Max Frame Size : %u MiB" , app.frameSize / 1048576);
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DEBUG_INFO("Cursor : 0x%" PRIXPTR " (0x%08x)", (uintptr_t)app.cursorData, app.cursorOffset);
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DEBUG_INFO("Cursor : 0x%" PRIXPTR " (0x%08x)", (uintptr_t)app.pointerData, app.pointerOffset);
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for (int i = 0; i < MAX_FRAMES; ++i)
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{
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@ -159,7 +191,7 @@ int app_main()
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DEBUG_INFO("Frame %d : 0x%" PRIXPTR " (0x%08x)", i, (uintptr_t)app.frame[i], app.frameOffset[i]);
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}
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struct CaptureInterface * iface = NULL;
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CaptureInterface * iface = NULL;
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for(int i = 0; CaptureInterfaces[i]; ++i)
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{
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iface = CaptureInterfaces[i];
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@ -185,17 +217,50 @@ int app_main()
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goto fail;
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}
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if (!captureStart(iface))
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app.iface = iface;
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app.frameEvent = os_createEvent();
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if (!app.frameEvent)
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{
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DEBUG_ERROR("Failed to create the frame event");
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exitcode = -1;
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goto exit;
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}
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app.updateEvent = os_createEvent();
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if (!app.updateEvent)
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{
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DEBUG_ERROR("Failed to create the update event");
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exitcode = -1;
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goto exit;
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}
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app.pointerEvent = os_createEvent();
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if (!app.pointerEvent)
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{
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DEBUG_ERROR("Failed to create the pointer event");
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exitcode = -1;
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goto exit;
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}
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if (!captureStart())
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{
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exitcode = -1;
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goto exit;
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}
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// start signalled
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os_signalEvent(app.updateEvent);
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while(app.running)
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{
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bool hasFrameUpdate = false;
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bool hasPointerUpdate = false;
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switch(iface->capture(&hasFrameUpdate, &hasPointerUpdate))
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// wait for one of the threads to flag an update
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if (!os_waitEvent(app.updateEvent) || !app.running)
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break;
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bool frameUpdate = false;
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bool pointerUpdate = false;
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switch(iface->capture(&frameUpdate, &pointerUpdate))
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{
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case CAPTURE_RESULT_OK:
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break;
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@ -218,7 +283,7 @@ int app_main()
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goto finish;
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}
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if (!captureStart(iface))
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if (!captureStart())
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{
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exitcode = -1;
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goto finish;
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@ -230,11 +295,35 @@ int app_main()
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exitcode = -1;
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goto finish;
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}
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if (frameUpdate && !os_signalEvent(app.frameEvent))
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{
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DEBUG_ERROR("Failed to signal the frame thread");
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exitcode = -1;
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goto finish;
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}
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if (pointerUpdate && !os_signalEvent(app.pointerEvent))
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{
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DEBUG_ERROR("Failed to signal the pointer thread");
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exitcode = -1;
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goto finish;
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}
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}
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finish:
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stopThreads();
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exit:
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if (app.pointerEvent)
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os_freeEvent(app.pointerEvent);
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if (app.frameEvent)
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os_freeEvent(app.frameEvent);
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if (app.updateEvent)
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os_freeEvent(app.updateEvent);
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iface->deinit();
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iface->free();
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fail:
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@ -245,4 +334,5 @@ fail:
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void app_quit()
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{
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app.running = false;
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os_signalEvent(app.updateEvent);
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}
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@ -31,7 +31,27 @@ typedef enum CaptureResult
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}
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CaptureResult;
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struct CaptureInterface
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typedef enum CaptureFormat
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{
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CAPTURE_FMT_BGRA,
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CAPTURE_FMT_RGBA,
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CAPTURE_FMT_RGBA10,
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CAPTURE_FMT_YUV420,
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CAPTURE_FMT_MAX
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}
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CaptureFormat;
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typedef struct CaptureFrame
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{
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unsigned int width;
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unsigned int height;
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unsigned int pitch;
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CaptureFormat format;
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void * data;
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}
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CaptureFrame;
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typedef struct CaptureInterface
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{
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const char * (*getName )();
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bool (*create )();
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@ -43,4 +63,7 @@ struct CaptureInterface
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CaptureResult (*capture)(
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bool * hasFrameUpdate,
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bool * hasPointerUpdate);
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};
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bool (*getFrame)(CaptureFrame * frame);
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}
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CaptureInterface;
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