C / C++ / MFC Discussion Boards

Re: How to ShellExecute a PDF to a specific page

David Crow25-Aug-14 3:52

David Crow

25-Aug-14 3:52

What is the net value of Path?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

how this error has generated -c program?

mybm122-Aug-14 20:33

mybm1

22-Aug-14 20:33

Quote:
fatal error: Utility1.h: No such file or directory
compilation terminated.

Re: how this error has generated -c program?

Richard MacCutchan22-Aug-14 21:07

Richard MacCutchan

22-Aug-14 21:07

The message is telling you what is wrong; what is it about "No such file or directory" that you do not understand?

Given this and your other questions, I strongly recommend you get hold of a decent reference on C programming. You cannot expect to learn it by asking repeated questions here.

Re: how this error has generated -c program?

mybm122-Aug-14 22:42

mybm1

22-Aug-14 22:42

but it is inside the directory that wat i was asking is it due to logical error or wat?

Re: how this error has generated -c program?

Richard MacCutchan23-Aug-14 0:16

Richard MacCutchan

23-Aug-14 0:16

Are you sure that your project configuration includes that directory in its search path?

can anyone suggest how to convert matlab code into c code..for resampling function

mybm121-Aug-14 19:10

mybm1

21-Aug-14 19:10

Quote:
can anyone suggest how to convert matlab code into c code..for resampling function

Re: can anyone suggest how to convert matlab code into c code..for resampling function

Richard MacCutchan21-Aug-14 21:50

Richard MacCutchan

21-Aug-14 21:50

This question is impossible to answer. Code conversion is mostly a manual task. If you want an automated conversion tool then you should use Google to find suggestions.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

mybm121-Aug-14 23:11

mybm1

21-Aug-14 23:11

what is this catalysis MCS tool..

Re: can anyone suggest how to convert matlab code into c code..for resampling function

Richard MacCutchan21-Aug-14 23:23

Richard MacCutchan

21-Aug-14 23:23

maibam debina wrote:
what is this catalysis MCS tool.

Sorry, I have no idea.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

mybm121-Aug-14 23:25

mybm1

21-Aug-14 23:25

actually in matlab the function is available for resample but in c for me its hard so can u suggest some.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

Richard MacCutchan22-Aug-14 0:19

Richard MacCutchan

22-Aug-14 0:19

Sorry, but I do not know matlab, you would probably get better response by going to a dedicateed forum.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

mybm122-Aug-14 0:21

mybm1

22-Aug-14 0:21

but i know u r master in c program..so leaving matlab aside do u know how to represent in c code for resampling..

Re: can anyone suggest how to convert matlab code into c code..for resampling function

Richard MacCutchan22-Aug-14 0:34

Richard MacCutchan

22-Aug-14 0:34

maibam debina wrote:
c code for resampling

I have no idea what you mean by resampling. If you have a specific coding issue then put the details here and people will try to help you. But it is unlikely that anyone has the time to write your code, or convert from one language to another.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

C^hris L^osinger22-Aug-14 8:32

C^hris L^osinger

22-Aug-14 8:32

what kind of resampling (bilinear, bicubic, trilinear, spline, sinc, etc)? and for what (audio, video, statistical, etc.) ?

image processing toolkits | batch image processing

Re: can anyone suggest how to convert matlab code into c code..for resampling function

mybm122-Aug-14 18:41

mybm1

22-Aug-14 18:41

audio and do please guide how to find the time duration of the .wave file?

Re: can anyone suggest how to convert matlab code into c code..for resampling function

enhzflep23-Aug-14 18:31

enhzflep

23-Aug-14 18:31

Here's some code that does re-sampling of audio. No idea if it'll be of any use to you - googling for how to do it it was not much easier than implementing it. It was used for up-sampling 8363 samples/sec sound into 44100 samples/sec sound. It was used for working with the audio samples as found in .XM files (somewhat similar to Amiga .mod files, or less-so, .MIDI files)

There's bound to be a bunch of code here that's useless to you, but I've no idea which format your .WAV files are, so I'll leave it to you to use that which you need. You're also on-your-own when it comes to reading the samples from a WAV file - in my instance, the header of the samples is different to the .WAV file header - my data also came with a single header - the wav file contains a number of chunks, each of these has its own header.

The re-sampling is of the linear variety.
You can determine the play-time of the WAV file by looking at a number of the chunk headers inside it. Don't ask me how, as I haven't bothered to do it, and don't know. (nor am I interested)

This page seems to be an easier read than the Wikipedia WAV page - http://www.sonicspot.com/guide/wavefiles.html[^]

C++

float *convert8tofloat(char *input, int numSamples)
{
    float *result = new float[numSamples];
    int i;
    for (i=0; i<numSamples; i++)
    {
        result[i] = input[i] / 128.0; //(((input[i]+128)/255.0) - 0.5) * 2.0;
    }
    return result;
}

float *convert16tofloat(short *input, int numSamples)
{
    float *result = new float[numSamples];
    int i;
    for (i=0; i<numSamples; i++)
    {
        result[i] = (int)input[i] / 32768.0; //(((input[i]+128)/255.0) - 0.5) * 2.0;
    }
    return result;
}

// t in range [0..1]
char interpolate8(char val1, char val2, float t)
{
    short difference;
    difference = val2 - val1;
    return val1 + t*difference;
}
// t in range [0..1]
short interpolate16(short val1, short val2, float t)
{
    int difference;
    difference = val2 - val1;
    return val1 + t*difference;
}
// t in range [0..1]
float interpolateFloat32(float val1, float val2, float t)
{
    float difference;
    difference = val2 - val1;
    return val1 + t*difference;
}


char *resample8Interp(char *input, int numSamplesIn, int numSamplesOut)
{
    char *output;
    output = new char[numSamplesOut];
    float curIndex, proportion, step;
    char curVal;
    int i, intPart;

    output[0] = input[0];
    output[numSamplesOut-1] = input[numSamplesIn-1];
    step = (float) (numSamplesIn-1) / (numSamplesOut-1);

    for (i=1; i<numSamplesOut-1; i++)
    {
        curIndex = (float) i * step;
        intPart = floor(curIndex);
        proportion = curIndex - intPart;
        curVal = interpolate8(input[intPart], input[intPart+1], proportion);
        output[i] = curVal;
    }
    return(output);
}

short *resample16Interp(short *input, int numSamplesIn, int numSamplesOut)
{
    short *output;
    output = new short[numSamplesOut];
    float curIndex, proportion, step;
    short curVal;
    int i, intPart;

    output[0] = input[0];
    output[numSamplesOut-1] = input[numSamplesIn-1];
    step = (float) (numSamplesIn-1) / (numSamplesOut-1);

    for (i=1; i<numSamplesOut-1; i++)
    {
        curIndex = (float) i * step;
        intPart = floor(curIndex);
        proportion = curIndex - intPart;
        curVal = interpolate16(input[intPart], input[intPart+1], proportion);
        output[i] = curVal;
    }
    return(output);
}

float *reSampleFloat32(float *srcArray, int origNumSamples, int origRate, int newRate, int &outNumSamples)
{
    outNumSamples = (origNumSamples * newRate) / origRate;
    float *output = new float[outNumSamples];
    int i, intPart;
    float fractionalPart, curIndex, curVal, step;

    step = (float)(origNumSamples-1) / (outNumSamples-1);
    output[0] = srcArray[0];
    output[outNumSamples-1] = srcArray[origNumSamples-1];
    for (i=0; i<outNumSamples; i++)
    {
        curIndex = step * i;
        intPart = floor(curIndex);
        fractionalPart = curIndex - intPart;
        curVal = interpolateFloat32(srcArray[intPart], srcArray[intPart+1], fractionalPart);
        output[i] = curVal;
    }
    return output;
}

Here's some examples of implementation. I dont remember a thing about the code, haven't touched it in years - nor am I inclined to. That's an exercise for you. I assume some of the comments are misleading - I just changed the one that says "only works for 16 bit samples" - it had said "only works for 8 bit samples, which was clearly inaccurate.

Finally, not that in my case I wanted to convert the samples to be a 32-bit floating point format in the range [-1..1] which simplifies drawing them to screen.

Good luck!

C++

void onSmpListChange(HWND smpListBox, XMFile *mSong)
{
    int curIns, curSmp;
    HWND dlg = GetParent(smpListBox);
    HWND insList = GetDlgItem(dlg, IDC_INS_LIST);

    curIns = SendMessage(insList, LB_GETCURSEL, 0, 0);
    curSmp = SendMessage(smpListBox, LB_GETCURSEL, 0, 0);

    XMSample *curSample = &mSong->instruments[curIns].samples[curSmp];
    int bits=8, numSamples = curSample->header.sampleLength;
    float *tmpBuffer;

    if (curSample->header.compression == 0)
        SetDlgItemText(dlg, IDC_COMP, "Delta");
    else
    {
        SetDlgItemText(dlg, IDC_COMP, "ADPCM");
        return;
    }

    // only works for 16 bit samples
    if (curSample->header.type & 0x16)
    {
        printf("Resampling 16bit sound, %d samples - %20.20s\n", numSamples, curSample->header.sampleName);
        numSamples /= 2;
        SetDlgItemInt(dlg, IDC_BITS, 16, true);
        char fileName[48];
        strcpy(fileName, "16bit 8363hz.wav");
//        strncat(fileName, curSample->header.sampleName, 20);
        writeWavFile(fileName, curSample->data, numSamples, 16, 1, 8363);

        short *sBuf = resample16Interp((short*)curSample->data, numSamples, 44100*numSamples / 8363);
        strcpy(fileName, "16bit 44100hz.wav");
//        strncat(fileName, curSample->header.sampleName, 20);
        writeWavFile(fileName, sBuf, (44100*numSamples)/8363, 16, 1, 44100);
        delete sBuf;

        tmpBuffer = convert16tofloat((short*)curSample->data, numSamples);
    }

    else
    {
        printf("Resampling 8bit sound, %d samples - %20.20s\n", numSamples, curSample->header.sampleName);
        SetDlgItemInt(dlg, IDC_BITS, 8, true);
        char fileName[48];
        strcpy(fileName, "8bit 8363hz.wav");
//        strncat(fileName, curSample->header.sampleName, 20);
        writeWavFile(fileName, curSample->data, numSamples, 8, 1, 8363);

        char *cBuf = resample8Interp((char*)curSample->data, numSamples, 44100*numSamples / 8363);
        strcpy(fileName, "8bit 44100hz.wav");
//        strncat(fileName, curSample->header.sampleName, 20);
        writeWavFile(fileName, cBuf, (44100*numSamples)/8363, 8, 1, 44100);
        delete cBuf;

        tmpBuffer = convert8tofloat((char*)curSample->data, numSamples);
    }
    // wParam = buffer (float)  // lParam = count
    SetDlgItemInt(dlg, IDC_NUM, numSamples, true);

    SendDlgItemMessage(dlg, IDC_WAV_IMG, WM_SET_DATA, (WPARAM)tmpBuffer, (LPARAM)numSamples);// * 44100 / 8835);



    delete g_curSamples;
    g_curSamples = tmpBuffer;
    g_numSamples = numSamples;// * 44100/8355;
}


void onConvertBtn(HWND parentDlg)
{
    float *mSamples;
    int nSamples;

//    mSamples = reSample(g_curSamples, g_numSamples, 8363, 44100, nSamples);
    mSamples = reSampleFloat32(g_curSamples, g_numSamples, xmRate, 44100, nSamples);
    SendDlgItemMessage(parentDlg, IDC_WAV_IMG2, WM_SET_DATA, (WPARAM)mSamples, (LPARAM)nSamples);
    delete mSamples;
}

Re: can anyone suggest how to convert matlab code into c code..for resampling function

mybm124-Aug-14 19:30

mybm1

24-Aug-14 19:30

thank you fren....

Re: can anyone suggest how to convert matlab code into c code..for resampling function

jschell22-Aug-14 10:21

jschell

22-Aug-14 10:21

Steps
- Analyze matlab code to understand it. This might involve researching matlab provided methods.
- Learn C
- Use the above to write C code.

Researching existing C libraries might also be helpful.

Re: can anyone suggest how to convert matlab code into c code..for resampling function

Albert Holguin28-Aug-14 5:51

Albert Holguin

28-Aug-14 5:51

Best answer really... I have yet to see a "code converter" that did a good job without generating cluttered, hard to read code (that can run slow compared to if you have just done the conversion manually).

how to call a function inside another function in file like utility.c

mybm120-Aug-14 0:03

mybm1

20-Aug-14 0:03

Quote:
how to call a function inside another function in file like utility.c

Re: how to call a function inside another function in file like utility.c

Richard MacCutchan20-Aug-14 1:00

Richard MacCutchan

20-Aug-14 1:00

That question is impossible to answer. Please give some proper detailed context about your problem. Calling a function is just the same wherever you call it from.

Re: how to call a function inside another function in file like utility.c

mybm120-Aug-14 1:22

mybm1

20-Aug-14 1:22

utility.c file consist of following function:

function list_file_directory() // function 1
{
//listing wave file from directory;
}
function wavread()   // function 2<pre>

{
// reading the .wav file;
}
function noise
{
//here i want to call the both above function and perform futher calculation //is it possible?
}

main.c
{
call function 1
{display}
call function 2
{
display
}
}

Re: how to call a function inside another function in file like utility.c

Richard MacCutchan20-Aug-14 3:06

Richard MacCutchan

20-Aug-14 3:06