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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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29
host/platform/Windows/capture/NVFBC/src/nvfbc.c
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@@ -275,11 +275,6 @@ static void nvfbc_free(void)
NvFBCFree();
}
static unsigned int nvfbc_getMaxFrameSize(void)
{
return this->maxWidth * this->maxHeight * 4;
}
static unsigned int nvfbc_getMouseScale(void)
{
return this->dpi * 100 / DPI_100_PERCENT;
@@ -320,7 +315,8 @@ static CaptureResult nvfbc_capture(void)
return CAPTURE_RESULT_OK;
}
static CaptureResult nvfbc_waitFrame(CaptureFrame * frame)
static CaptureResult nvfbc_waitFrame(CaptureFrame * frame,
const size_t maxFrameSize)
{
if (!lgWaitEvent(this->frameEvent, 1000))
return CAPTURE_RESULT_TIMEOUT;
@@ -339,12 +335,15 @@ static CaptureResult nvfbc_waitFrame(CaptureFrame * frame)
++this->formatVer;
}
frame->formatVer = this->formatVer;
frame->width = this->grabWidth;
frame->height = this->grabHeight;
frame->pitch = this->grabStride * 4;
frame->stride = this->grabStride;
frame->rotation = CAPTURE_ROT_0;
const unsigned int maxHeight = maxFrameSize / (this->grabStride * 4);
frame->formatVer = this->formatVer;
frame->width = this->grabWidth;
frame->height = maxHeight > this->grabHeight ? this->grabHeight : maxHeight;
frame->realHeight = this->grabHeight;
frame->pitch = this->grabStride * 4;
frame->stride = this->grabStride;
frame->rotation = CAPTURE_ROT_0;
#if 0
//NvFBC never sets bIsHDR so instead we check for any data in the alpha channel
@@ -366,12 +365,13 @@ static CaptureResult nvfbc_waitFrame(CaptureFrame * frame)
return CAPTURE_RESULT_OK;
}
static CaptureResult nvfbc_getFrame(FrameBuffer * frame)
static CaptureResult nvfbc_getFrame(FrameBuffer * frame,
const unsigned int height)
{
framebuffer_write(
frame,
this->frameBuffer,
this->grabInfo.dwHeight * this->grabInfo.dwBufferWidth * 4
height * this->grabInfo.dwBufferWidth * 4
);
return CAPTURE_RESULT_OK;
}
@@ -442,7 +442,6 @@ struct CaptureInterface Capture_NVFBC =
.stop = nvfbc_stop,
.deinit = nvfbc_deinit,
.free = nvfbc_free,
.getMaxFrameSize = nvfbc_getMaxFrameSize,
.getMouseScale = nvfbc_getMouseScale,
.capture = nvfbc_capture,
.waitFrame = nvfbc_waitFrame,