BASS_StreamCreateFile(path,offset,length,BassFlags) always returns '0'. I am not understanding how to use this function. Need help on the usage of BassFlags.
PS : Using this with the help of WPF Sound Visualization Library.
Since 0 only informs you that there's an error, you should check what kind of error it is:
int BASS_ErrorGetCode();
This gives you the errorcode for the recent error.
Here's the list of possible error codes (= return values):
BASS_ERROR_INIT // BASS_Init has not been successfully called.
BASS_ERROR_NOTAVAIL // Only decoding channels (BASS_STREAM_DECODE) are allowed when using the "no sound" device. The BASS_STREAM_AUTOFREE // flag is also unavailable to decoding channels.
BASS_ERROR_ILLPARAM // The length must be specified when streaming from memory.
BASS_ERROR_FILEOPEN // The file could not be opened.
BASS_ERROR_FILEFORM // The file's format is not recognised/supported.
BASS_ERROR_CODEC // The file uses a codec that is not available/supported. This can apply to WAV and AIFF files, and also MP3 files when using the "MP3-free" BASS version.
BASS_ERROR_FORMAT // The sample format is not supported by the device/drivers. If the stream is more than stereo or the BASS_SAMPLE_FLOAT flag is used, it could be that they are not supported.
BASS_ERROR_SPEAKER // The specified SPEAKER flags are invalid. The device/drivers do not support them, they are attempting to assign a stereo stream to a mono speaker or 3D functionality is enabled.
BASS_ERROR_MEM // There is insufficient memory.
BASS_ERROR_NO3D // Could not initialize 3D support.
BASS_ERROR_UNKNOWN // Some other mystery problem!
(from bass.h)
Also make shure you have initialised BASS properly - BASS_Init() must get called before you create a stream:
BOOL BASS_Init(
int device, // The device to use... -1 = default device, 0 = no sound, 1 = first real output device
DWORD freq, // Output sample rate
DWORD flags, // A combination of flags
HWND win, // The application's main window... 0 = the current foreground window (use this for console applications)
GUID *clsid // Class identifier of the object to create, that will be used to initialize DirectSound... NULL = use default
);
Example:
int device = -1; // Default device
int freq = 44100; // Sample rate
BASS_Init(device, freq, 0, 0, NULL); // Init BASS
Related
I am having trouble reading OpenVINO IR networks (XML and bin) from memory using ie_core_read_network_from_memory() in the OpenVINO 2021.4 C API ie_c_api.h.
I suspect that I am creating the network weight blob wrong, but I cannot find any information on how to create weight blobs correctly for networks.
I have read the OpenVINO C API docs but cannot deduce from docs what I am doing wrong. The OpenVINO code repo contains some C code samples, but none of the samples seem to use ie_core_read_network_from_memory().
Below is a cut out of the code I am having trouble with.
// void* dmem->data - network memory buffer (float32)
// size_t dmem->size - size of network memory buffer (bytes)
ie_core_t* ov_core = NULL;
IEStatusCode status = ie_core_create("", &ov_core);
if (status != OK)
{
// error handling
}
const dimensions_t weights_tensor_dims =
{ 4, { 1, 1, 1, dmem->size/sizeof(float) } };
tensor_desc_t weights_tensor_desc = { OIHW, weights_tensor_dims, FP32 };
ie_blob_t* ov_model_weight_blob = NULL;
status = ie_blob_make_memory_from_preallocated(
&weights_tensor_desc, dmem->data, dmem->size, &ov_model_weight_blob);
if (status != OK)
{
// error handling
}
// char* model_xml_desc - the model's XML string
uint8_t* ov_model_xml_content = (uint8_t*)model_xml_desc;
ie_network_t* ov_network = NULL;
size_t xml_sz = strlen(ov_model_xml_content);
status = ie_core_read_network_from_memory(
ov_core, ov_model_xml_content, xml_sz, ov_model_weight_blob, &ov_network);
if (status != OK)
{
// Always get "GENERAL_ERROR (-1)"
}
The code works fine down to the ie_core_read_network_from_memory() call which results in "GENERAL_ERROR".
I have tried two models that were converted from Tensorflow. One is a simple [X] -> [Y] regression model (single input value, single output value). The other is also a regression model [X_1, X_2, ..., X_9] -> [Y] (nine input values, single output value). They work fine when reading them from file with ie_core_read_network(), but for my use case I must provide the network as a binary memory buffer and XML string.
I would appreciate any help, either by pointing out what I am getting wrong or directing me to some code samples that use ie_core_read_network_from_memory().
System information:
Windows 10
OpenVINO v2021.4.689
Microsoft Visual Studio 2019
UPDATE: An Intel employee reached out to me in another forum and pointed out that there is a unit test for ie_core_read_network_from_memory(). The unit test successfully reads a network from memory and made clear that I was in fact using a faulty tensor description to produce the weight blob, just as I suspected. Apparently the weight blob descriptor should be one dimensional, have memory layout ANY and datatype U8 even though the model weights are fp32.
From the unit test:
std::string bin_std = TestDataHelpers::generate_model_path("test_model", "test_model_fp32.bin");
const char* bin = bin_std.c_str();
//...
std::vector<uint8_t> weights_content(content_from_file(bin, true));
tensor_desc_t weights_desc { ANY, { 1, { weights_content.size() } }, U8 };
However, simply changing the tensor descriptor was not enough to get my code to work so it remains for me to properly translate the C++ code from the unit test to my C environment before the issue to can be considered solved.
Thanks
Refer to tensor_desc struct and standard layout format.
Apart from that, it is recommended to use the Benchmark_app tool to test the inference performance.
I write a driver in windows, and I need disk drive serial number, for user mode I found this ansver.
My question is it possible to translate the above code to kernel mode, and how? Is WMI query available in filter driver? Sample code can greatly help.
EDIT:
I found here this code, but how I rewrite him for get serial number?
void GetSmbios()
{
NTSTATUS status;
GUID smbiosGUID = SMBIOS_DATA_GUID; // defined in wmiguid.h
PVOID wmiObject = NULL;
PWNODE_ALL_DATA dataBuffer;
ULONG bufferSize;
int TAG_SMBIOS = 'smbi';
//
// Get a WMI block handle to the SMBIOS_DATA_GUID
//
status = IoWMIOpenBlock((GUID *)&smbiosGUID, WMIGUID_QUERY,
&wmiObject);
if (!NT_SUCCESS(status))
{
return status;
}
//
// Determine how much space is required for the data
//
status = IoWMIQueryAllData(wmiObject, &bufferSize, NULL);
if (status != STATUS_BUFFER_TOO_SMALL)
{
ObDereferenceObject(wmiObject);
return status;
}
//
// Allocate the necessary storage. This space must come out of NP-pool
//
dataBuffer = ExAllocatePoolWithTag(
NonPagedPool,
bufferSize,
TAG_SMBIOS);
if (dataBuffer == NULL)
{
ObDereferenceObject(wmiObject);
return STATUS_INSUFFICIENT_RESOURCES;
}
}
After allocating memory, I believe you need to call IoWMIQueryAllData() again, this time passing dataBuffer.
SMBIOS doesn't seem related to disk drives, so you'll want a different GUID to pass to IoWMIOpenBlock(). Perhaps this one ({BF253431-1E4D-4F57-00E7-64B2CACC801E}), since your user-mode example and others query Win32_PhysicalMedia to get SerialNumber.
However, this references a (presumably user-mode) DLL that is the provider for Win32_PhysicalMedia. So this may not be accessible in kernel-mode.
But it also gives a hint how to get the information from kernel-mode: IOCTLs. It mentions IOCTL_SMART_GET_VERSION, which should be just SMART_GET_VERSION, and here's an example:
(in user-mode, but you should be able to do similar from kernel-mode using ZwDeviceIoControlFile()). Note it follows up with another ioctl command, SMART_RCV_DRIVE_DATA, to get the serial number.
Another ioctl that sounds promising (and more general) is IOCTL_STORAGE_QUERY_PROPERTY, with the input STORAGE_PROPERTY_QUERY.PropertyId set to StorageDeviceProperty, so the output will be a STORAGE_DEVICE_DESCRIPTOR structure, which has field SerialNumberOffset:
Specifies the byte offset from the beginning of the structure to a null-terminated ASCII string that contains the device's serial number. If the device has no serial number, this member is zero.
FILE_FS_VOLUME_INFORMATION contains field VolumeSerialNumber. This data structure might be retrieved with ZwQueryVolumeInformationFile(... FileFsVolumeInformation).
That requires a handle to the volume or a file/directory in the volume. If that's not feasible, but you have a DEVICE_OBJECT, you might try building your own IRP with IRP_MJ_QUERY_VOLUME_INFORMATION and sending it with IoCallDriver(), though I don't know if that's sanctioned -- the docs say such a "request is sent by the I/O Manager."
I am wondering where I can find C tutorial/example of using AntLR. All I found is using Java language.
I am focusing to find a main function which use the parser and lexer generated by AntLR.
Take a look at this document
And here is an example:
// Example of a grammar for parsing C sources,
// Adapted from Java equivalent example, by Terence Parr
// Author: Jim Idle - April 2007
// Permission is granted to use this example code in any way you want, so long as
// all the original authors are cited.
//
// set ts=4,sw=4
// Tab size is 4 chars, indent is 4 chars
// Notes: Although all the examples provided are configured to be built
// by Visual Studio 2005, based on the custom build rules
// provided in $(ANTLRSRC)/code/antlr/main/runtime/C/vs2005/rulefiles/antlr3.rules
// there is no reason that this MUST be the case. Provided that you know how
// to run the antlr tool, then just compile the resulting .c files and this
// file together, using say gcc or whatever: gcc *.c -I. -o XXX
// The C code is generic and will compile and run on all platforms (please
// report any warnings or errors to the antlr-interest newsgroup (see www.antlr.org)
// so that they may be corrected for any platform that I have not specifically tested.
//
// The project settings such as additional library paths and include paths have been set
// relative to the place where this source code sits on the ANTLR perforce system. You
// may well need to change the settings to locate the includes and the lib files. UNIX
// people need -L path/to/antlr/libs -lantlr3c (release mode) or -lantlr3cd (debug)
//
// Jim Idle (jimi cut-this at idle ws)
//
// You may adopt your own practices by all means, but in general it is best
// to create a single include for your project, that will include the ANTLR3 C
// runtime header files, the generated header files (all of which are safe to include
// multiple times) and your own project related header files. Use <> to include and
// -I on the compile line (which vs2005 now handles, where vs2003 did not).
//
#include <C.h>
// Main entry point for this example
//
int ANTLR3_CDECL
main (int argc, char *argv[])
{
// Now we declare the ANTLR related local variables we need.
// Note that unless you are convinced you will never need thread safe
// versions for your project, then you should always create such things
// as instance variables for each invocation.
// -------------------
// Name of the input file. Note that we always use the abstract type pANTLR3_UINT8
// for ASCII/8 bit strings - the runtime library guarantees that this will be
// good on all platforms. This is a general rule - always use the ANTLR3 supplied
// typedefs for pointers/types/etc.
//
pANTLR3_UINT8 fName;
// The ANTLR3 character input stream, which abstracts the input source such that
// it is easy to provide input from different sources such as files, or
// memory strings.
//
// For an ASCII/latin-1 memory string use:
// input = antlr3NewAsciiStringInPlaceStream (stringtouse, (ANTLR3_UINT64) length, NULL);
//
// For a UCS2 (16 bit) memory string use:
// input = antlr3NewUCS2StringInPlaceStream (stringtouse, (ANTLR3_UINT64) length, NULL);
//
// For input from a file, see code below
//
// Note that this is essentially a pointer to a structure containing pointers to functions.
// You can create your own input stream type (copy one of the existing ones) and override any
// individual function by installing your own pointer after you have created the standard
// version.
//
pANTLR3_INPUT_STREAM input;
// The lexer is of course generated by ANTLR, and so the lexer type is not upper case.
// The lexer is supplied with a pANTLR3_INPUT_STREAM from whence it consumes its
// input and generates a token stream as output.
//
pCLexer lxr;
// The token stream is produced by the ANTLR3 generated lexer. Again it is a structure based
// API/Object, which you can customise and override methods of as you wish. a Token stream is
// supplied to the generated parser, and you can write your own token stream and pass this in
// if you wish.
//
pANTLR3_COMMON_TOKEN_STREAM tstream;
// The C parser is also generated by ANTLR and accepts a token stream as explained
// above. The token stream can be any source in fact, so long as it implements the
// ANTLR3_TOKEN_SOURCE interface. In this case the parser does not return anything
// but it can of course specify any kind of return type from the rule you invoke
// when calling it.
//
pCParser psr;
// Create the input stream based upon the argument supplied to us on the command line
// for this example, the input will always default to ./input if there is no explicit
// argument.
//
if (argc < 2 || argv[1] == NULL)
{
fName =(pANTLR3_UINT8)"./input"; // Note in VS2005 debug, working directory must be configured
}
else
{
fName = (pANTLR3_UINT8)argv[1];
}
// Create the input stream using the supplied file name
// (Use antlr3AsciiFileStreamNew for UCS2/16bit input).
//
input = antlr3AsciiFileStreamNew(fName);
// The input will be created successfully, providing that there is enough
// memory and the file exists etc
//
if ( input == NULL)
{
fprintf(stderr, "Failed to open file %s\n", (char *)fName);
exit(1);
}
// Our input stream is now open and all set to go, so we can create a new instance of our
// lexer and set the lexer input to our input stream:
// (file | memory | ?) --> inputstream -> lexer --> tokenstream --> parser ( --> treeparser )?
//
lxr = CLexerNew(input); // CLexerNew is generated by ANTLR
// Need to check for errors
//
if ( lxr == NULL )
{
fprintf(stderr, "Unable to create the lexer due to malloc() failure1\n");
exit(1);
}
// Our lexer is in place, so we can create the token stream from it
// NB: Nothing happens yet other than the file has been read. We are just
// connecting all these things together and they will be invoked when we
// call the parser rule. ANTLR3_SIZE_HINT can be left at the default usually
// unless you have a very large token stream/input. Each generated lexer
// provides a token source interface, which is the second argument to the
// token stream creator.
// Note that even if you implement your own token structure, it will always
// contain a standard common token within it and this is the pointer that
// you pass around to everything else. A common token as a pointer within
// it that should point to your own outer token structure.
//
tstream = antlr3CommonTokenStreamSourceNew(ANTLR3_SIZE_HINT, TOKENSOURCE(lxr));
if (tstream == NULL)
{
fprintf(stderr, "Out of memory trying to allocate token stream\n");
exit(1);
}
// Finally, now that we have our lexer constructed, we can create the parser
//
psr = CParserNew(tstream); // CParserNew is generated by ANTLR3
if (psr == NULL)
{
fprintf(stderr, "Out of memory trying to allocate parser\n");
exit(ANTLR3_ERR_NOMEM);
}
// We are all ready to go. Though that looked complicated at first glance,
// I am sure, you will see that in fact most of the code above is dealing
// with errors and there isn't really that much to do (isn't this always the
// case in C? ;-).
//
// So, we now invoke the parser. All elements of ANTLR3 generated C components
// as well as the ANTLR C runtime library itself are pseudo objects. This means
// that they are represented as pointers to structures, which contain any
// instance data they need, and a set of pointers to other interfaces or
// 'methods'. Note that in general, these few pointers we have created here are
// the only things you will ever explicitly free() as everything else is created
// via factories, that allocated memory efficiently and free() everything they use
// automatically when you close the parser/lexer/etc.
//
// Note that this means only that the methods are always called via the object
// pointer and the first argument to any method, is a pointer to the structure itself.
// It also has the side advantage, if you are using an IDE such as VS2005 that can do it
// that when you type ->, you will see a list of tall the methods the object supports.
//
psr->translation_unit(psr);
// We did not return anything from this parser rule, so we can finish. It only remains
// to close down our open objects, in the reverse order we created them
//
psr ->free (psr); psr = NULL;
tstream ->free (tstream); tstream = NULL;
lxr ->free (lxr); lxr = NULL;
input ->close (input); input = NULL;
return 0;
}
contrapunctus.net/blog/2012/antlr-c a simple google would suffice. Note however, the example is C++ I don't think ANTLR supports PURE C – Aniket Jan 1 at 1:56
I am trying to use LoadBitmap to load an image from a resource file.
I've verified that the resource is linked correctly -- examining the final EXE with a hex editor shows that the bitmap is packed inside the EXE correctly.
I've also verified that the bitmap is valid -- using LoadImage with LR_LOADFROMFILE to load the bitmap from disk at runtime works fine and I see it appear when I add it to a gui element later.
I've verified that the ID that I use to access the resource is valid as well -- the FindResource function finds the resource and SizeofResource prints the exact expected number of bytes for the bitmap.
So I have a valid linked resource, a valid ID, and a loadable bitmap.
However, LoadBitmap returns NULL and so does LoadImage if I load from a resource instead of from disk. GetLastError returns 0.
Any ideas? Am I #defining RT_BITMAP in resource.rc correctly?
Thanks.
resource.h
#define BMP_TEST_ID 2
resource.rc
#include "resource.h" // defines BMP_TEST_ID
#define RT_BITMAP 2
BMP_TEST_ID RT_BITMAP "TEST24.BMP"
test.c
#include <windows.h> // defines RT_BITMAP as MAKEINTRESOURCE(2)
#include "resource.h" // defines BMP_TEST_ID
HINSTANCE instance = GetModuleHandle(NULL);
if (!instance) { /* handle error */ }
/* find a bitmap resource with the ID we want -- OK! */
HRSRC rsc = FindResource(instance, RT_BITMAP, MAKEINTRESOURCE(BMP_TEST_ID));
if (!rsc) { /* handle error */ }
/* prints the exact size of the found resource -- GIVES CORRECT OUTPUT */
printf("SizeofResource: %d\n", (int) SizeofResource(instance, rsc));
// ***** THIS BIT DOESN'T WORK *****
/* load bitmap resource -- FAIL! */
HBITMAP bitmap = (HBITMAP)LoadBitmap(instance, MAKEINTRESOURCE(BMP_TEST_ID));
if (!bitmap) { /* handle error */ }
/* load bitmap from file -- OK! */
HBITMAP bitmap2 = (HBITMAP)LoadImage (NULL, "TEST24.BMP", IMAGE_BITMAP,0,0,LR_LOADFROMFILE);
if (!bitmap2) { /* handle error */ }
My compiler is amd64-mingw32msvc-gcc 4.6.3
First, you should not have to define RT_BITMAP at all. It is already defined through winuser.h to be included in your c/cpp files. And it turns out you don't need it in your resource file anyway.
The BITMAP resource type will properly assign the right resource type id for your bitmap file. Change your bitmap resource declaration to be:
BMP_TEST_ID BITMAP "TEST24.BMP"
And you should be good to go.
I'm a beginner with Bass (working right now on an MFC project) and I'm trying to figure this out.
I saw that I should start with the BASS_Init function, but I found two example, one with 4 parameters and one with 6.
When I trying to use the function, it only gives a 5-parameter version with no overloads, and when I try to use it, my app crashes. Is there a good example for using BASS on MFC that I could learn from? Or where do I find the docs for the API?
The line is:
BASS_Init(-1,44100,0,this->m_hWnd,NULL);
I've tried:
BASS_Init(-1,44100,0,GetSafeHwnd(),NULL);
but it still crashes
The BASS_Init()-function takes 5 Parameters:
BOOL BASS_Init(
int device, // The device to use... -1 = default device, 0 = no sound, 1 = first real output device
DWORD freq, // Output sample rate
DWORD flags, // A combination of flags
HWND win, // The application's main window... 0 = the current foreground window (use this for console applications)
GUID *clsid // Class identifier of the object to create, that will be used to initialize DirectSound... NULL = use default
);
Example:
int device = -1; // Default device
int freq = 44100; // Sample rate
BASS_Init(device, freq, 0, 0, NULL); // Init BASS
API Documentation: http://www.un4seen.com/doc/#bass/BASS_Init.html