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[host] kvmfr: allow the frame size to exceed the available memory

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This change allows the host to still transmit a frame that is truncated
if the IVSHMEM size is too small to allow for a full frame.
This commit is contained in:
Geoffrey McRae
2021-06-12 18:44:28 +10:00
parent 4b99bba200
commit d36c4f0e83
5 changed files with 44 additions and 65 deletions
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24
host/src/app.c
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@@ -156,7 +156,7 @@ static int frameThread(void * opaque)
continue;
}
switch(app.iface->waitFrame(&frame))
switch(app.iface->waitFrame(&frame, app.maxFrameSize))
{
case CAPTURE_RESULT_OK:
repeatFrame = false;
@@ -230,6 +230,7 @@ static int frameThread(void * opaque)
fi->formatVer = frame.formatVer;
fi->width = frame.width;
fi->height = frame.height;
fi->realHeight = frame.realHeight;
fi->stride = frame.stride;
fi->pitch = frame.pitch;
fi->offset = pageSize - FrameBufferStructSize;
@@ -248,7 +249,7 @@ static int frameThread(void * opaque)
DEBUG_ERROR("%s", lgmpStatusString(status));
continue;
}
app.iface->getFrame(fb);
app.iface->getFrame(fb, frame.height);
}
DEBUG_INFO("Frame thread stopped");
return 0;
@@ -295,24 +296,7 @@ static bool captureStart(void)
}
}
const unsigned int maxFrameSize = app.iface->getMaxFrameSize();
if (maxFrameSize > app.maxFrameSize)
{
DEBUG_ERROR("Maximum frame size of %d bytes exceeds maximum space available", maxFrameSize);
const float needed = ((maxFrameSize * 2) / 1048576.0f) + 10.0f;
const int size = (int)powf(2.0f, ceilf(logf(needed) / logf(2.0f)));
char * msg;
alloc_sprintf(&msg, "IVSHMEM size too small, increase to %d MiB", size);
os_showMessage("Looking Glass Error", msg);
free(msg);
return false;
}
DEBUG_INFO("Capture Size : %u MiB (%u)", maxFrameSize / 1048576, maxFrameSize);
DEBUG_INFO("==== [ Capture Start ] ====");
DEBUG_INFO("==== [ Capture Start ] ====");
return true;
}