static MIL_INT ProcessingFunction(MIL_INT HookType, MIL_ID HookId, IntPtr HookDataPtr)
{
// this is how to check if the user data is null, the IntPtr class
// contains a member, Zero, which exists solely for this purpose
if (!IntPtr.Zero.Equals(HookDataPtr))
{
// get the handle to the ProcessingHookDataStruct object back from the IntPtr
GCHandle hUserData = GCHandle.FromIntPtr(HookDataPtr);
// get a reference to the ProcessingHookDataStruct object
ProcessingHookDataStruct UserHookDataPtr = hUserData.Target as ProcessingHookDataStruct;
MIL_ID ModifiedBufferId = MIL.M_NULL;
string Text;
// Retrieve the MIL_ID of the grabbed buffer.
MIL.MdigGetHookInfo(HookId, MIL.M_MODIFIED_BUFFER + MIL.M_BUFFER_ID, ref ModifiedBufferId);
switch (UserHookDataPtr.ProcessingOperation)
{
case ProcessingHookOperation.DISPLAY:
// Update the display with the last captured image.
MIL.MbufCopy(ModifiedBufferId, UserHookDataPtr.MilImageDisp);
break;
case ProcessingHookOperation.ENCODE:
// Increase the compressed images count.
UserHookDataPtr.ProcessedImageCount++;
// Print and draw the frame count (comment to reduce CPU usage).
Console.Write("Processing frame #{0}.\r", UserHookDataPtr.ProcessedImageCount);
Text = string.Format("{0}", UserHookDataPtr.ProcessedImageCount);
MIL.MgraText(MIL.M_DEFAULT, ModifiedBufferId, STRING_POS_X, STRING_POS_Y, Text);
// Enqueue the grabbed buffer for parallel encoding.
MIL.MseqFeed(UserHookDataPtr.MilSeqContext, ModifiedBufferId, MIL.M_DEFAULT);
// Update the display with the last captured image.
MIL.MbufCopy(ModifiedBufferId, UserHookDataPtr.MilImageDisp);
break;
}
}
return(0);
}
// Main function. //
// ---------------//
static int Main(string[] args)
{
MIL_ID MilApplication = MIL.M_NULL;
MIL_ID MilRemoteApplication = MIL.M_NULL;
MIL_ID MilSystem = MIL.M_NULL;
MIL_ID MilDigitizer = MIL.M_NULL;
MIL_ID MilDisplay = MIL.M_NULL;
MIL_ID MilImageDisp = MIL.M_NULL;
MIL_ID[] MilGrabBufferList = new MIL_ID[BUFFERING_SIZE_MAX];
MIL_ID MilCompressContext = MIL.M_NULL;
MIL_ID MilDecompressContext = MIL.M_NULL;
MIL_INT LicenseModules = 0;
MIL_INT MilSystemLocation = MIL.M_NULL;
MIL_INT MilGrabBufferListSize;
MIL_INT ProcessFrameCount = 0;
MIL_INT NbFrames = 0;
MIL_INT n = 0;
double EncodingDesiredFrameRate = 0.0;
double ProcessFrameRate = 0.0;
MIL_INT SeqProcessFilePathSize = 0;
StringBuilder SeqProcessFilePath = null;
ProcessingHookDataStruct ProcessingUserHookData = new ProcessingHookDataStruct();
EncodingFrameEndHookDataStruct EncodingFrameEndUserHookData = new EncodingFrameEndHookDataStruct();
DecodingFrameEndHookDataStruct DecodingFrameEndUserHookData = new DecodingFrameEndHookDataStruct();
MIL_INT SeqSystemType = MIL.M_NULL;
// Allocate defaults.
MIL.MappAllocDefault(MIL.M_DEFAULT, ref MilApplication, ref MilSystem, ref MilDisplay, ref MilDigitizer, ref MilImageDisp);
MIL.MsysInquire(MilSystem, MIL.M_OWNER_APPLICATION, ref MilRemoteApplication);
MilSystemLocation = MIL.MsysInquire(MilSystem, MIL.M_LOCATION, MIL.M_NULL);
if (MIL.MappInquire(MilRemoteApplication, MIL.M_PLATFORM_OS_TYPE, MIL.M_NULL) != MIL.M_OS_WINDOWS)
{
if (MilSystemLocation == MIL.M_REMOTE)
{
Console.WriteLine("The Distributed MIL server must run on a Windows system.");
}
else
{
Console.WriteLine("This example only works with a Windows system.");
}
Console.WriteLine("Press <Enter> to end.");
Console.ReadKey();
MIL.MappFreeDefault(MilApplication, MilSystem, MilDisplay, MilDigitizer, MilImageDisp);
return(0);
}
// Inquire MIL licenses.
MIL.MappInquire(MilRemoteApplication, MIL.M_LICENSE_MODULES, ref LicenseModules);
if ((LicenseModules & MIL.M_LICENSE_JPEGSTD) != MIL.M_LICENSE_JPEGSTD)
{
Console.WriteLine("Need a Compression/Decompression license to run this example.");
Console.WriteLine("Press <Enter> to end.");
Console.ReadKey();
MIL.MappFreeDefault(MilApplication, MilSystem, MilDisplay, MilDigitizer, MilImageDisp);
return(0);
}
// Allocate the grab buffers and clear them.
MIL.MappControl(MIL.M_DEFAULT, MIL.M_ERROR, MIL.M_PRINT_DISABLE);
for (MilGrabBufferListSize = 0; MilGrabBufferListSize < BUFFERING_SIZE_MAX; MilGrabBufferListSize++)
{
MIL.MbufAllocColor(MilSystem, MIL.MdigInquire(MilDigitizer, MIL.M_SIZE_BAND, MIL.M_NULL),
MIL.MdigInquire(MilDigitizer, MIL.M_SIZE_X, MIL.M_NULL),
MIL.MdigInquire(MilDigitizer, MIL.M_SIZE_Y, MIL.M_NULL),
8 + MIL.M_UNSIGNED, MIL.M_IMAGE + MIL.M_GRAB + MIL.M_PROC,
ref MilGrabBufferList[MilGrabBufferListSize]);
if (MilGrabBufferList[MilGrabBufferListSize] != MIL.M_NULL)
{
MIL.MbufClear(MilGrabBufferList[MilGrabBufferListSize], 0xFF);
}
else
{
break;
}
}
MIL.MappControl(MIL.M_DEFAULT, MIL.M_ERROR, MIL.M_PRINT_ENABLE);
// Free buffers to leave space for possible temporary buffers.
for (n = 0; n < 2 && MilGrabBufferListSize > 0; n++)
{
MilGrabBufferListSize--;
MIL.MbufFree(MilGrabBufferList[MilGrabBufferListSize]);
}
if (MilGrabBufferListSize == 0)
{
Console.WriteLine("!!! No grab buffers have been allocated. Need to set more Non-Paged Memory. !!!");
MIL.MappFreeDefault(MilApplication, MilSystem, MilDisplay, MilDigitizer, MilImageDisp);
Console.WriteLine("Press <Enter> to end.");
Console.ReadKey();
return(1);
}
/* Initialize the User's processing function data structure only for Display. */
ProcessingUserHookData.MilDigitizer = MilDigitizer;
ProcessingUserHookData.MilSeqContext = MIL.M_NULL;
ProcessingUserHookData.MilImageDisp = MilImageDisp;
ProcessingUserHookData.ProcessedImageCount = 0;
ProcessingUserHookData.ProcessingOperation = ProcessingHookOperation.DISPLAY;
// get a handle to the HookDataStruct object in the managed heap, we will use this
// handle to get the object back in the callback function
GCHandle hUserData = GCHandle.Alloc(ProcessingUserHookData);
// Start the sequence acquisition. The preprocessing and encoding hook function
// is called for every frame grabbed.
MIL_DIG_HOOK_FUNCTION_PTR ProcessingFunctionDelegate = new MIL_DIG_HOOK_FUNCTION_PTR(ProcessingFunction);
/* Start a digProcess to show the live camera output. */
MIL.MdigProcess(MilDigitizer, MilGrabBufferList, MilGrabBufferListSize, MIL.M_START, MIL.M_DEFAULT, ProcessingFunctionDelegate, GCHandle.ToIntPtr(hUserData));
/* Print a message. */
Console.Write("\nH.264 IMAGE SEQUENCE COMPRESSION.\n");
Console.Write("---------------------------------\n\n");
Console.Write("Press <Enter> to start compression.\r");
Console.ReadKey();
/* Stop digProcess. */
MIL.MdigProcess(MilDigitizer, MilGrabBufferList, MilGrabBufferListSize, MIL.M_STOP, MIL.M_DEFAULT, ProcessingFunctionDelegate, GCHandle.ToIntPtr(hUserData));
/* Inquire the dig process frame rate */
MIL.MdigInquire(MilDigitizer, MIL.M_PROCESS_FRAME_RATE, ref EncodingDesiredFrameRate);
Console.Write("Grabbing frames at {0:0.00} frames/sec.\n", EncodingDesiredFrameRate);
// Creates a context for the H.264 compression engine. Compression will be done
// using hardware or software depending on the system hardware configuration.
MIL.MseqAlloc(MilSystem, MIL.M_DEFAULT, MIL.M_SEQ_COMPRESS, MIL.M_DEFAULT, MIL.M_DEFAULT, ref MilCompressContext);
// Specify the destination of the compressed file and the target container type.
// The last argument specifies to generate an MP4 file.
MIL.MseqDefine(MilCompressContext, MIL.M_SEQ_OUTPUT(0) + MIL.M_SEQ_DEST(0), MIL.M_FILE,
(MilSystemLocation != MIL.M_REMOTE ? SEQUENCE_FILE : REMOTE_SEQUENCE_FILE),
MIL.M_FILE_FORMAT_MP4);
// Set the compression parameters.
// Sets the compression parameters valid for any resolution under 1920X1080.
// Any resolution higher than that will generate an warning that can be disabled using
// MseqControl with M_SETTING_AUTO_ADJUSTMENT. See documentation for more details.
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_BIT_RATE_MODE, MIL.M_VARIABLE); // MIL.M_VARIABLE or MIL.M_CONSTANT
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_BIT_RATE, 5000); // 5 Mbps bit rate
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_BIT_RATE_MAX, 5000); // 5 Mbps bit rate
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_FRAME_RATE, EncodingDesiredFrameRate); // 60Hz frame rate.
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_FRAME_RATE_MODE, MIL.M_VARIABLE); // Attempts to update the file header with the encoding frame rate
// if lower than the specified frame rate.
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_QUALITY, 100); // 1=best speed, 100=best quality
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_PROFILE, MIL.M_PROFILE_HIGH); // MIL.M_PROFILE_BASELINE, MIL.M_PROFILE_MAIN, MIL.M_PROFILE_HIGH
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_LEVEL, MIL.M_LEVEL_4_2); // MIL.M_LEVEL_1, MIL.M_LEVEL_1B, MIL.M_LEVEL_1_1, MIL.M_LEVEL_1_2, MIL.M_LEVEL_1_3,
// MIL.M_LEVEL_2, MIL.M_LEVEL_2_1, MIL.M_LEVEL_2_2,
// MIL.M_LEVEL_3, MIL.M_LEVEL_3_1, MIL.M_LEVEL_3_2,
// MIL.M_LEVEL_4, MIL.M_LEVEL_4_1, MIL.M_LEVEL_4_2,
// MIL.M_LEVEL_5, MIL.M_LEVEL_5_1
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_STREAM_GROUP_OF_PICTURE_SIZE, 30); // Interval between I-Frame
// Initialize the optional encoding end function data structure.
EncodingFrameEndUserHookData.EncodedImageCount = 0;
// get a handle to the HookDataStruct object in the managed heap, we will use this
// handle to get the object back in the callback function
GCHandle EncodingFrameEndUserHookDataHandle = GCHandle.Alloc(EncodingFrameEndUserHookData);
// Register the encoding end function to the sequence context.
MIL_SEQ_HOOK_FUNCTION_PTR FrameEncodingEndFunctionDelegate = new MIL_SEQ_HOOK_FUNCTION_PTR(FrameEncodingEndFunction);
MIL.MseqHookFunction(MilCompressContext, MIL.M_FRAME_END, FrameEncodingEndFunctionDelegate, GCHandle.ToIntPtr(EncodingFrameEndUserHookDataHandle));
// Provide a sample image to initialize the encoding engine accordingly.
MIL.MseqControl(MilCompressContext, MIL.M_CONTEXT, MIL.M_BUFFER_SAMPLE, MilGrabBufferList[0]);
// Start the encoding process, waits for buffer to be fed for encoding.
MIL.MseqProcess(MilCompressContext, MIL.M_START, MIL.M_ASYNCHRONOUS);
// Display the type of compression used.
Console.Write("Live image capture and compression to file using ");
MIL.MseqInquire(MilCompressContext, MIL.M_CONTEXT, MIL.M_CODEC_TYPE, ref SeqSystemType);
if (SeqSystemType == MIL.M_HARDWARE + MIL.M_QSV)
{
Console.WriteLine("Hardware acceleration.");
}
else // MIL.M_SOFTWARE + MIL.M_QSV
{
Console.WriteLine("Software implementation.");
}
// Set the sequence context id in the user hook data structure to start
// feeding buffers for encoding in ProcessingFunction.
//
ProcessingUserHookData.MilSeqContext = MilCompressContext;
ProcessingUserHookData.ProcessedImageCount = 0;
ProcessingUserHookData.ProcessingOperation = ProcessingHookOperation.ENCODE;
MIL.MdigProcess(MilDigitizer, MilGrabBufferList, MilGrabBufferListSize, MIL.M_START, MIL.M_DEFAULT, ProcessingFunctionDelegate, GCHandle.ToIntPtr(hUserData));
// NOTE: Now the main() is free to perform other tasks while the compression is executing.
// ---------------------------------------------------------------------------------------
// Print a message and wait for a key press after a minimum number of frames.
Console.WriteLine("Press <Enter> to stop.\n");
Console.ReadKey();
// Stop the processing.
MIL.MdigProcess(MilDigitizer, MilGrabBufferList, MilGrabBufferListSize, MIL.M_STOP + MIL.M_WAIT, MIL.M_DEFAULT, ProcessingFunctionDelegate, GCHandle.ToIntPtr(hUserData));
// Free the processing user data handle.
hUserData.Free();
// Stop the encoding process
MIL.MseqProcess(MilCompressContext, MIL.M_STOP, MIL.M_WAIT);
// Make sure the hook handler function delegate is not prematurely garbage collected since
// only MIL has a reference to it.
GC.KeepAlive(FrameEncodingEndFunctionDelegate);
// Free the encoding user data handle.
EncodingFrameEndUserHookDataHandle.Free();
// Print statistics.
MIL.MdigInquire(MilDigitizer, MIL.M_PROCESS_FRAME_COUNT, ref ProcessFrameCount);
MIL.MdigInquire(MilDigitizer, MIL.M_PROCESS_FRAME_RATE, ref ProcessFrameRate);
Console.WriteLine("{0} frames encoded at {1:0.00} frames/sec ({2:0.0} ms/frame).", ProcessFrameCount, ProcessFrameRate, 1000.0 / ProcessFrameRate);
Console.WriteLine();
MIL.MseqInquire(MilCompressContext, MIL.M_SEQ_OUTPUT(0) + MIL.M_SEQ_DEST(0), MIL.M_STREAM_FILE_NAME_SIZE, ref SeqProcessFilePathSize);
SeqProcessFilePath = new StringBuilder((int)SeqProcessFilePathSize);
MIL.MseqInquire(MilCompressContext, MIL.M_SEQ_OUTPUT(0) + MIL.M_SEQ_DEST(0), MIL.M_STREAM_FILE_NAME, SeqProcessFilePath);
Console.WriteLine("The video sequence file was written to:");
Console.WriteLine("{0}.", SeqProcessFilePath.ToString());
Console.WriteLine();
Console.WriteLine("It can be played back using any compatible video player.");
// Free the grab buffers and sequence context.
while (MilGrabBufferListSize > 0)
{
MIL.MbufFree(MilGrabBufferList[--MilGrabBufferListSize]);
MilGrabBufferList[MilGrabBufferListSize] = MIL.M_NULL;
}
MIL.MseqFree(MilCompressContext);
// Wait for a key to start the replay.
Console.WriteLine("Press <Enter> to replay encoded sequence.");
Console.ReadKey();
MIL.MseqAlloc(MilSystem, MIL.M_DEFAULT, MIL.M_SEQ_DECOMPRESS,
MIL.M_DEFAULT, MIL.M_DEFAULT, ref MilDecompressContext);
// Specify the destination of the compressed file and the target container type.
// The last argument specifies to generate an MP4 file.
MIL.MseqDefine(MilDecompressContext, MIL.M_SEQ_INPUT(0), MIL.M_FILE,
(MilSystemLocation != MIL.M_REMOTE ? SEQUENCE_FILE : REMOTE_SEQUENCE_FILE),
MIL.M_FILE_FORMAT_MP4);
double outputFrameRate = 0.0;
MIL.MseqInquire(MilDecompressContext, MIL.M_SEQ_INPUT(0), MIL.M_STREAM_FRAME_RATE, ref outputFrameRate);
Console.WriteLine();
Console.WriteLine("Replaying file at {0:0.00} frames/second.", outputFrameRate);
// Initialize the optional decoding end function data structure.
DecodingFrameEndUserHookData.DecodedImageCount = 0;
DecodingFrameEndUserHookData.MilImageDisp = MilImageDisp;
// get a handle to the HookDataStruct object in the managed heap, we will use this
// handle to get the object back in the callback function
GCHandle DecodingFrameEndUserHookDataHandle = GCHandle.Alloc(DecodingFrameEndUserHookData);
// Register the decoding end function to the sequence context.
MIL_SEQ_HOOK_FUNCTION_PTR FrameDecodingEndFunctionDelegate = new MIL_SEQ_HOOK_FUNCTION_PTR(FrameDecodingEndFunction);
MIL.MseqHookFunction(MilDecompressContext, MIL.M_FRAME_END, FrameDecodingEndFunctionDelegate, GCHandle.ToIntPtr(DecodingFrameEndUserHookDataHandle));
// Start the decoding process, waits for buffer to be fed for encoding.
MIL.MseqProcess(MilDecompressContext, MIL.M_START, MIL.M_ASYNCHRONOUS);
// Print a message and wait for a key press after a minimum number of frames.
Console.WriteLine("Press <Enter> to stop.\n");
Console.ReadKey();
// Stop the play back.
MIL.MseqProcess(MilDecompressContext, MIL.M_STOP, MIL.M_NULL);
// Make sure the hook handler function delegate is not prematurely garbage collected since
// only MIL has a reference to it.
GC.KeepAlive(FrameDecodingEndFunctionDelegate);
// Free the decoding user data handle.
DecodingFrameEndUserHookDataHandle.Free();
MIL.MseqFree(MilDecompressContext);
// Wait for a key to end.
Console.WriteLine("Press <Enter> to end.");
Console.ReadKey();
// Release defaults.
MIL.MappFreeDefault(MilApplication, MilSystem, MilDisplay, MilDigitizer, MilImageDisp);
return(0);
}