gmane.comp.audio.csound.devel

[Cs-dev] Regression in loscil recognizing looping info in wavheaders

Forrest Cahoon — 2012-05-24T02:22:37

Hello --

I think something happened in the code that caused csound to stop
finding looping info stored in WAV format headers.

I generated my own wav sample with looping info using libsndfile, and
it worked on 2012-04-07 with the debian unstable packaged of the time,
which was built from 5.15.

There have been two debian packages since then, both of 5.17, and I'm
not sure which one broke this.

I'd be happy to do more testing, but I'm not sure what info to
provide.  Right now, I'm kind of hoping someone will have an "a-ha"
moment based on this report and know how to fix it.

Forrest

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[Cs-dev] New Parser bug (csound 5) ( was Re: ksmps=1 conditional issue).

Victor Lazzarini — 2012-05-22T09:14:15

It is a new parser bug (possibly optimisation).  The assignment never occurs with i-vars, but it does with constants and k-vars,
as demonstrated by the CSD below:

<CsoundSynthesizer>
<CsOptions>
</CsOptions>
<CsInstruments>
instr 1
iClip = 0.9
k1 oscili 2,440,1
if k1 > iClip then
k1 = iClip
elseif k1 < -iClip then
k1 = -iClip
endif
printk 0.01, k1
endin
instr 2
iClip = 0.9
k1 oscili 2,440,1
if k1 > iClip then
k1 = iClip
elseif k1 < -iClip then
k1 = -0.9
endif
printk 0.01, k1
endin
instr 3
kClip = 0.9
k1 oscili 2,440,1
if k1 > kClip then
k1 = kClip
elseif k1 < -kClip then
k1 = -kClip
endif
printk 0.01, k1
endin
</CsInstruments>
<CsScore>
f1 0 1024 10 1
i1 0 1
i2 1 1
i3 2 1
</CsScore>
</CsoundSynthesizer>

Victor


On 22 May 2012, at 07:31, Oeyvind Brandtsegg wrote:


Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie




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[Cs-dev] ksmps=1 conditional issue

Oeyvind Brandtsegg — 2012-05-22T06:31:45

Hi,
I'm not sure what to make out of this.

For pedagogical purposes, I tried to implement an explicit coding of
hard clip (like the limit opcode).
Using ksmps = 1, I did this:

k1downsampa1
if k1 > iClip then
k1= iClip
elseif k1 < -iClip then
k1= -iClip
endif
a1upsamp k1

I can't seem to find anything wrong with the code, but it only limits
the positive part of the waveform,
the negative part remains untouched.
If I replace
k1= -iClip
with
k1= -0.5
it will limit, but obviously not the way I wanted.

Could look like a bug ?

best
Oeyvind

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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T17:30:13

Thanks!

On 5/21/12, Sigurd Saue <sigurd.saue< at >ntnu.no> wrote:

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Re: [Cs-dev] C bytebeat experiment

Sigurd Saue — 2012-05-21T17:04:40

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< at >gmail.com]
Sendt: 21. mai 2012 18:38
Til: richarddobson< at >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 <adotsdothmusic< at >gmail.com> wrote:

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#include <windows.h>
#include <dsound.h>
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.nChannels = 2;
  wf.wBitsPerSample = 16;
  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;
  bd.dwBufferBytes = wf.nAvgBytesPerSec*5;
  bd.lpwfxFormat = &wf;
  HRESULT res = IDirectSound_CreateSoundBuffer(ds, &bd, &bf, NULL);
  LPVOID ap1, ap2;
  DWORD bt1, bt2;
  res = IDirectSoundBuffer_Lock(bf, 0, 0, &ap1, &bt1, &ap2, &bt2, DSBLOCK_ENTIREBUFFER);
  short *buf = (short*) malloc(bd.dwBufferBytes);
  short *q = buf;
  int t;
  for (t = 0; t < 44100*5; t++)
  {
    *q++ = 0;
    *q++ = (t&t>>8);
  }
  CopyMemory(ap1, buf, 44100*4*5);
  res = IDirectSoundBuffer_Unlock(bf, ap1, bt1, ap2, bt2);
  res = IDirectSoundBuffer_Play(bf, 0, 0, DSBPLAY_LOOPING);
  Sleep(15000);
  res = IDirectSoundBuffer_Stop(bf);
  return 0;
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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T16:38:53

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 <adotsdothmusic< at >gmail.com> wrote:

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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T16:23:52

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

On 5/21/12, Richard Dobson <richarddobson< at >blueyonder.co.uk> wrote:

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Re: [Cs-dev] C bytebeat experiment

Richard Dobson — 2012-05-21T16:11:10


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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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T15:29:12

Changed to this:

#include <windows.h>
#include <dsound.h>
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 <adotsdothmusic< at >gmail.com> wrote:

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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T14:24:05

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 <sigurd.saue< at >ntnu.no> wrote:

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Re: [Cs-dev] C bytebeat experiment

Sigurd Saue — 2012-05-21T14:14:07

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< at >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 <sigurd.saue< at >ntnu.no> wrote:

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Re: [Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T14:11:08

What do I need to change?

On 5/21/12, Sigurd Saue <sigurd.saue< at >ntnu.no> wrote:

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Re: [Cs-dev] C bytebeat experiment

Sigurd Saue — 2012-05-21T14:04:51

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< at >gmail.com] 
Sent: Monday, May 21, 2012 3:44 PM
To: csound-devel< at >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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[Cs-dev] C bytebeat experiment

Adam Puckett — 2012-05-21T13:43:47

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

Thanks.
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[Cs-dev] CS6: Headers and install

Steven Yi — 2012-05-16T15:38:31

Hi all,

Just FYI, I've just committed some CMake changes so that PUBLIC_HEADER
is used when building OSX Framework.  I had to move the inclusion of
H/CMakeLists.txt higher up in the main Cmake file, so that I could
grab the list of headers and add them to the src list as well as use
as the PUBLIC_HEADER argument.  (Note: It took a while to figure out,
but the headers must be part of the src list for PUBLIC_HEADER to
work).

Now, I think there is a possible way to use just PUBLIC_HEADER and not
use the install command for installing these headers. I think if you
use PUBLIC_HEADER on non-OSX, those headers get installed into
/usr/local/include/csound, but I have not tried it.  It's a possible
place to improve this, I think.  Has anyone experience with this or
thoughts on it?

Thanks!
steven

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Re: [Cs-dev] CS6: PO/MO files - where to install

Steven Yi — 2012-05-15T20:05:48

Ah, okay. I've made the change to Top/getstring.c and
po/CMakeLists.txt and pushed it.

Thanks!
steven

On Tue, May 15, 2012 at 3:57 PM, Felipe Sateler <fsateler< at >gmail.com> wrote:

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Re: [Cs-dev] CS6: Installed Header Locations

Steven Yi — 2012-05-15T20:01:53

Okay.  Compiler search path and <csound.h> sounds good too.

On Tue, May 15, 2012 at 3:54 PM, Felipe Sateler <fsateler< at >gmail.com> wrote:

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Re: [Cs-dev] CS6: Installed Header Locations

Michael Gogins — 2012-05-15T20:00:55

I have seen the following pattern which seems to simplify things to me:

In /usr/local/include there is a csound dir.
In the csound dir there is a versioned csound dir.
I.e. we have /usr/local/incude/csound/csound6 and
/usr/local/include/csound/csound6
Then to include headers, we can have "#include
<csound/csound6/csound.h>" and it just works off /usr/local/include,
or we can have "#include <csound.h>" but the build has to be
configured to look in /usr/local/csound/csound6.

Regards,
Mike

On Tue, May 15, 2012 at 3:54 PM, Felipe Sateler <fsateler< at >gmail.com> wrote:

Re: [Cs-dev] CS6: PO/MO files - where to install

Felipe Sateler — 2012-05-15T19:57:52

Line 76 uses dgettext("csound5", s). That csound5 should be changed to
csound6 (and the cmakelists updated). I'm not on my own computer now,
that's why I don't change it myself.

On Tue, May 15, 2012 at 3:49 PM, Steven Yi <stevenyi< at >gmail.com> wrote:

Re: [Cs-dev] CS6: Installed Header Locations

Felipe Sateler — 2012-05-15T19:54:24

Yes, it makes sense to install by default to csound6 to avoid
conflicts with csound5. But I think apps should still just #include
<csound.h> and manipulate the compiler search path.


On Tue, May 15, 2012 at 3:46 PM, Steven Yi <stevenyi< at >gmail.com> wrote:

Re: [Cs-dev] CS6: PO/MO files - where to install

Steven Yi — 2012-05-15T19:49:34

I'm not too familiar with all the gettext stuff in Csound.  I did see
this in Top/getstring.c:

/*    textdomain("csound5"); */  /* This is not needed when using dgettext */

So, maybe it's not an issue?

On Tue, May 15, 2012 at 2:02 PM, Felipe Sateler <fsateler< at >gmail.com> wrote:

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