The attached file compiles but the resulting exe crashes. What am I
doing wrong? (OS: XP SP3, using DirectSound)

Thanks.

It looks to me like you're reading way beyond your buffer. You've allocated (44100*4*5) bytes, but in your loop you're accessing elements four times that size: q++ is a short pointer and moves two bytes for each increment and you do that twice for each step of the for loop.

Sigurd

-----Original Message-----
From: Adam Puckett [mailto:adotsdothmusic@gmail.com] 
Sent: Monday, May 21, 2012 3:44 PM
To: csound-devel@lists.sourceforge.net
Subject: [Cs-dev] C bytebeat experiment

The attached file compiles but the resulting exe crashes. What am I doing wrong? (OS: XP SP3, using DirectSound)

Thanks.

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What do I need to change?

On 5/21/12, Sigurd Saue  wrote:
> It looks to me like you're reading way beyond your buffer. You've allocated
> (44100*4*5) bytes, but in your loop you're accessing elements four times
> that size: q++ is a short pointer and moves two bytes for each increment and
> you do that twice for each step of the for loop.
>
> Sigurd
>
> -----Original Message-----
> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
> Sent: Monday, May 21, 2012 3:44 PM
> To: csound-devel@lists.sourceforge.net
> Subject: [Cs-dev] C bytebeat experiment
>
> The attached file compiles but the resulting exe crashes. What am I doing
> wrong? (OS: XP SP3, using DirectSound)
>
> Thanks.
>
> ------------------------------------------------------------------------------
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> https://lists.sourceforge.net/lists/listinfo/csound-devel
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I'm not 100 % sure what you want to achieve, but what if you change the loop counter to:

for (t = 0; t < 44100*5; t++)		// Removed *4

Sigurd

-----Original Message-----
From: Adam Puckett [mailto:adotsdothmusic@gmail.com] 
Sent: Monday, May 21, 2012 4:11 PM
To: Developer discussions
Subject: Re: [Cs-dev] C bytebeat experiment

What do I need to change?

On 5/21/12, Sigurd Saue  wrote:
> It looks to me like you're reading way beyond your buffer. You've 
> allocated
> (44100*4*5) bytes, but in your loop you're accessing elements four 
> times that size: q++ is a short pointer and moves two bytes for each 
> increment and you do that twice for each step of the for loop.
>
> Sigurd
>
> -----Original Message-----
> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
> Sent: Monday, May 21, 2012 3:44 PM
> To: csound-devel@lists.sourceforge.net
> Subject: [Cs-dev] C bytebeat experiment
>
> The attached file compiles but the resulting exe crashes. What am I 
> doing wrong? (OS: XP SP3, using DirectSound)
>
> Thanks.
>
> ----------------------------------------------------------------------
> --------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and 
> threat landscape has changed and how IT managers can respond. 
> Discussions will include endpoint security, mobile security and the 
> latest in malware threats. 
> http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Csound-devel mailing list
> Csound-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/csound-devel
>

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Just tried changing the loop and getting the same thing.

What I'm trying to do is fill the left channel of a 5-second buffer
with silence and the right channel with an arbitrary bytebeat "song".
I used (t&t>>8) as an example to see if I could get it to work.

On 5/21/12, Sigurd Saue  wrote:
> I'm not 100 % sure what you want to achieve, but what if you change the loop
> counter to:
>
> for (t = 0; t < 44100*5; t++)		// Removed *4
>
> Sigurd
>
> -----Original Message-----
> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
> Sent: Monday, May 21, 2012 4:11 PM
> To: Developer discussions
> Subject: Re: [Cs-dev] C bytebeat experiment
>
> What do I need to change?
>
> On 5/21/12, Sigurd Saue  wrote:
>> It looks to me like you're reading way beyond your buffer. You've
>> allocated
>> (44100*4*5) bytes, but in your loop you're accessing elements four
>> times that size: q++ is a short pointer and moves two bytes for each
>> increment and you do that twice for each step of the for loop.
>>
>> Sigurd
>>
>> -----Original Message-----
>> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
>> Sent: Monday, May 21, 2012 3:44 PM
>> To: csound-devel@lists.sourceforge.net
>> Subject: [Cs-dev] C bytebeat experiment
>>
>> The attached file compiles but the resulting exe crashes. What am I
>> doing wrong? (OS: XP SP3, using DirectSound)
>>
>> Thanks.
>>
>> ----------------------------------------------------------------------
>> --------
>> Live Security Virtual Conference
>> Exclusive live event will cover all the ways today's security and
>> threat landscape has changed and how IT managers can respond.
>> Discussions will include endpoint security, mobile security and the
>> latest in malware threats.
>> http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>> _______________________________________________
>> Csound-devel mailing list
>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
>
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> https://lists.sourceforge.net/lists/listinfo/csound-devel
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Changed to this:

#include 
#include 
int main(void)
{
  LPDIRECTSOUND ds;
  DSBUFFERDESC bd;
  WAVEFORMATEX wf;
  LPDIRECTSOUNDBUFFER bf;
  DirectSoundCreate(NULL, &ds, NULL);
  IDirectSound_SetCooperativeLevel(ds, GetDesktopWindow(), DSSCL_PRIORITY);
  ZeroMemory(&wf, sizeof(WAVEFORMATEX));
  wf.wFormatTag = WAVE_FORMAT_PCM;
  wf.wBitsPerSample = 16;
  wf.nChannels = 1;
  wf.nSamplesPerSec = 44100;
  wf.nBlockAlign = wf.wBitsPerSample * wf.nChannels / 8;
  wf.nAvgBytesPerSec = wf.nSamplesPerSec * wf.nBlockAlign;
  ZeroMemory(&bd, sizeof(DSBUFFERDESC));
  bd.dwSize = sizeof(DSBUFFERDESC);
  bd.dwFlags = DSBCAPS_GLOBALFOCUS | DSBCAPS_LOCHARDWARE;
  bd.dwBufferBytes = 44100*2*5;
  bd.lpwfxFormat = &wf;
  IDirectSound_CreateSoundBuffer(ds, &bd, &bf, NULL);
  LPVOID ap1, ap2;
  DWORD bt1, bt2;
  IDirectSoundBuffer_Lock(bf, 0, 0, &ap1, &bt1, &ap2, &bt2,
DSBLOCK_ENTIREBUFFER);
  int *q;
  q = malloc(44100*5);
  int t;
  for (t = 0; t < 44100*5; t++)
    *q++ = (t&t>>8);
  CopyMemory(ap1, q, bt1);
  IDirectSoundBuffer_Unlock(bf, ap1, bt1, ap2, bt2);
  IDirectSoundBuffer_Play(bf, 0, 0, DSBPLAY_LOOPING);
  Sleep(15000);
  IDirectSoundBuffer_Stop(bf);
  return 0;
}

Error reports vanish, but no sound. It's not even sleeping. :/

On 5/21/12, Adam Puckett  wrote:
> Just tried changing the loop and getting the same thing.
>
> What I'm trying to do is fill the left channel of a 5-second buffer
> with silence and the right channel with an arbitrary bytebeat "song".
> I used (t&t>>8) as an example to see if I could get it to work.
>
> On 5/21/12, Sigurd Saue  wrote:
>> I'm not 100 % sure what you want to achieve, but what if you change the
>> loop
>> counter to:
>>
>> for (t = 0; t < 44100*5; t++)		// Removed *4
>>
>> Sigurd
>>
>> -----Original Message-----
>> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
>> Sent: Monday, May 21, 2012 4:11 PM
>> To: Developer discussions
>> Subject: Re: [Cs-dev] C bytebeat experiment
>>
>> What do I need to change?
>>
>> On 5/21/12, Sigurd Saue  wrote:
>>> It looks to me like you're reading way beyond your buffer. You've
>>> allocated
>>> (44100*4*5) bytes, but in your loop you're accessing elements four
>>> times that size: q++ is a short pointer and moves two bytes for each
>>> increment and you do that twice for each step of the for loop.
>>>
>>> Sigurd
>>>
>>> -----Original Message-----
>>> From: Adam Puckett [mailto:adotsdothmusic@gmail.com]
>>> Sent: Monday, May 21, 2012 3:44 PM
>>> To: csound-devel@lists.sourceforge.net
>>> Subject: [Cs-dev] C bytebeat experiment
>>>
>>> The attached file compiles but the resulting exe crashes. What am I
>>> doing wrong? (OS: XP SP3, using DirectSound)
>>>
>>> Thanks.
>>>
>>> ----------------------------------------------------------------------
>>> --------
>>> Live Security Virtual Conference
>>> Exclusive live event will cover all the ways today's security and
>>> threat landscape has changed and how IT managers can respond.
>>> Discussions will include endpoint security, mobile security and the
>>> latest in malware threats.
>>> http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>>> _______________________________________________
>>> Csound-devel mailing list
>>> Csound-devel@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>
>>
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>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
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>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
>

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On 21/05/2012 16:29, Adam Puckett wrote:


> q = malloc(44100*5);
int t;
for (t = 0; t<  44100*5; t++)
      *q++ = > (t&t>>8);
CopyMemory(ap1, q, bt1);


At this point, q is at the end of the allocated block, so points to 
memory you don't own, rather than the allocated buffer with the intended 
contents. Preserve q from the call to malloc, and either use array 
indexing, or a second pointer initialized to q, and increment that. Then 
CopyMemory will copy the correct block - and you will be also able to 
call free on it afterwards.

May not be the only problem of course - too many years passed since I 
had to write any DirectSound code!

Richard Dobson



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Thanks Richard! This just came to mind while I was having lunch.

On 5/21/12, Richard Dobson  wrote:
> On 21/05/2012 16:29, Adam Puckett wrote:
>
>
>> q = malloc(44100*5);
> int t;
> for (t = 0; t<  44100*5; t++)
>       *q++ = > (t&t>>8);
> CopyMemory(ap1, q, bt1);
>
>
> At this point, q is at the end of the allocated block, so points to
> memory you don't own, rather than the allocated buffer with the intended
> contents. Preserve q from the call to malloc, and either use array
> indexing, or a second pointer initialized to q, and increment that. Then
> CopyMemory will copy the correct block - and you will be also able to
> call free on it afterwards.
>
> May not be the only problem of course - too many years passed since I
> had to write any DirectSound code!
>
> Richard Dobson
>
>
>
> ------------------------------------------------------------------------------
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> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
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> https://lists.sourceforge.net/lists/listinfo/csound-devel
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Finally! It works! But it was quiet at 44.1kHz, so I made it an 8kHz,
8-bit static buffer with which to create bytebeat songs. Wonderful!

Now, how do I make the sound play in one channel and not in the other,
or make the sound pan?

On 5/21/12, Adam Puckett  wrote:
> Thanks Richard! This just came to mind while I was having lunch.
>
> On 5/21/12, Richard Dobson  wrote:
>> On 21/05/2012 16:29, Adam Puckett wrote:
>>
>>
>>> q = malloc(44100*5);
>> int t;
>> for (t = 0; t<  44100*5; t++)
>>       *q++ = > (t&t>>8);
>> CopyMemory(ap1, q, bt1);
>>
>>
>> At this point, q is at the end of the allocated block, so points to
>> memory you don't own, rather than the allocated buffer with the intended
>> contents. Preserve q from the call to malloc, and either use array
>> indexing, or a second pointer initialized to q, and increment that. Then
>> CopyMemory will copy the correct block - and you will be also able to
>> call free on it afterwards.
>>
>> May not be the only problem of course - too many years passed since I
>> had to write any DirectSound code!
>>
>> Richard Dobson
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> threat landscape has changed and how IT managers can respond. Discussions
>> will include endpoint security, mobile security and the latest in malware
>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>> _______________________________________________
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>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
>

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Hi Adam,

I had to leave for home, but I now I've taken a closer look at your problem.

The attached file is a modification of your original file that plays stereo 44100 with the sound playing in one channel only. Btw: I had to remove the DSBCAPS_LOCHARDWARE option here, but it might still work on your computer.

Sigurd
________________________________________
Fra: Adam Puckett [adotsdothmusic@gmail.com]
Sendt: 21. mai 2012 18:38
Til: richarddobson@blueyonder.co.uk; Developer discussions
Emne: Re: [Cs-dev] C bytebeat experiment

Finally! It works! But it was quiet at 44.1kHz, so I made it an 8kHz,
8-bit static buffer with which to create bytebeat songs. Wonderful!

Now, how do I make the sound play in one channel and not in the other,
or make the sound pan?

On 5/21/12, Adam Puckett  wrote:
> Thanks Richard! This just came to mind while I was having lunch.
>
> On 5/21/12, Richard Dobson  wrote:
>> On 21/05/2012 16:29, Adam Puckett wrote:
>>
>>
>>> q = malloc(44100*5);
>> int t;
>> for (t = 0; t<  44100*5; t++)
>>       *q++ = > (t&t>>8);
>> CopyMemory(ap1, q, bt1);
>>
>>
>> At this point, q is at the end of the allocated block, so points to
>> memory you don't own, rather than the allocated buffer with the intended
>> contents. Preserve q from the call to malloc, and either use array
>> indexing, or a second pointer initialized to q, and increment that. Then
>> CopyMemory will copy the correct block - and you will be also able to
>> call free on it afterwards.
>>
>> May not be the only problem of course - too many years passed since I
>> had to write any DirectSound code!
>>
>> Richard Dobson
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> Exclusive live event will cover all the ways today's security and
>> threat landscape has changed and how IT managers can respond. Discussions
>> will include endpoint security, mobile security and the latest in malware
>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>> _______________________________________________
>> Csound-devel mailing list
>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
>

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Thanks!

On 5/21/12, Sigurd Saue  wrote:
> Hi Adam,
>
> I had to leave for home, but I now I've taken a closer look at your problem.
>
> The attached file is a modification of your original file that plays stereo
> 44100 with the sound playing in one channel only. Btw: I had to remove the
> DSBCAPS_LOCHARDWARE option here, but it might still work on your computer.
>
> Sigurd
> ________________________________________
> Fra: Adam Puckett [adotsdothmusic@gmail.com]
> Sendt: 21. mai 2012 18:38
> Til: richarddobson@blueyonder.co.uk; Developer discussions
> Emne: Re: [Cs-dev] C bytebeat experiment
>
> Finally! It works! But it was quiet at 44.1kHz, so I made it an 8kHz,
> 8-bit static buffer with which to create bytebeat songs. Wonderful!
>
> Now, how do I make the sound play in one channel and not in the other,
> or make the sound pan?
>
> On 5/21/12, Adam Puckett  wrote:
>> Thanks Richard! This just came to mind while I was having lunch.
>>
>> On 5/21/12, Richard Dobson  wrote:
>>> On 21/05/2012 16:29, Adam Puckett wrote:
>>>
>>>
>>>> q = malloc(44100*5);
>>> int t;
>>> for (t = 0; t<  44100*5; t++)
>>>       *q++ = > (t&t>>8);
>>> CopyMemory(ap1, q, bt1);
>>>
>>>
>>> At this point, q is at the end of the allocated block, so points to
>>> memory you don't own, rather than the allocated buffer with the intended
>>> contents. Preserve q from the call to malloc, and either use array
>>> indexing, or a second pointer initialized to q, and increment that. Then
>>> CopyMemory will copy the correct block - and you will be also able to
>>> call free on it afterwards.
>>>
>>> May not be the only problem of course - too many years passed since I
>>> had to write any DirectSound code!
>>>
>>> Richard Dobson
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Live Security Virtual Conference
>>> Exclusive live event will cover all the ways today's security and
>>> threat landscape has changed and how IT managers can respond. Discussions
>>> will include endpoint security, mobile security and the latest in malware
>>> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>>> _______________________________________________
>>> Csound-devel mailing list
>>> Csound-devel@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>
>>
>
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