[ALSA - lib 0002287]: Segfaults all functions after snd_pcm_hw_params_get_buffer_size (params,(snd_pcm_uframes_t *) & val);

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2287> 
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Reported By:                cruiseoveride
Assigned To:                
======================================================================
Project:                    ALSA - lib
Issue ID:                   2287
Category:                   0_general
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     new
======================================================================
Date Submitted:             07-16-2006 18:03 CEST
Last Modified:              07-23-2006 06:41 CEST
======================================================================
Summary:                    Segfaults all functions after
snd_pcm_hw_params_get_buffer_size (params,(snd_pcm_uframes_t *) & val);
Description: 
I am new to Alsa and am not happy at all at the state of documentation
available.
You guys seriously need to do something about this.

I have an M-Audio Audiophile Delta 192 (ICE1724) and I want to port
envy24control for this chip, However I first need to familiar myself with
the ALSA API. So I began by looking for simple examples on how to use ALSA
API and came accross the followinf prog (Attached file test.c).

The program compiles cleanly with gcc-4.1 and runs, however after it
prints out the ..."buffer size = 8192 frames"
It segfaults.

If you slash out line 104, it resolves the issue.

My question is,

Is there a bug in this function?
Code was obtained from http://www.linuxjournal.com/article/6735
======================================================================

----------------------------------------------------------------------
 cruiseoveride - 07-23-06 06:26 
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Ray, if i could do wat u said, dont u think i would have done it by now? 
I dont know anything about circuits. And all those snippets of code and
that too ALSA 0.9! from the ALSA homepage i have no idea how to compile
it, i can read and understand it but thats about it,

if u know how, why dont u tell me how to compile a driver. Say ive written
the thing with a similar structure to the ice1712, 
and ive called it icey1724.c Now how do i compile it, where do i compile
etc??? could u give me the command to compile it? which files to i put in
the library or header includes? i have no clue.

There is not 1 example on how to step, by step, write, compile and use an
ALSA driver on the entire ALSA website. I looked man, i really freakin
looked. if u know how please tell me how.

let me give u an example on how confusing the ALSA docs are... 

Say u dont know anything about C programming. And you want to display the
word "hello" on ur screen, so u come to "my" C programming website
(hypothetically) and all the example says is...

printf("%s","hello\n");

Now wat the hell do u do with that? Wat is that? where do u put it? how do
u compile it etc, etc???

Do u (not u ray, we're buddies) understand wat im trying to say,

----------------------------------------------------------------------
 Raymond - 07-23-06 06:41 
----------------------------------------------------------------------
Assume that you understand diff (differnce between old source and new
source)

Just follow HG repo URL in
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2287#11135 to insert a
new driver into
alsa-kernel tree (You need to select a shortname for audiophile 192 and
made changes corresponding to envy24ht)

audiophile.c
audiophine.h

Issue History
Date Modified  Username       Field                    Change              
======================================================================
07-16-06 18:03 cruiseoveride  New Issue                                    
07-16-06 18:03 cruiseoveride  File Added: test.c                           
07-16-06 20:38 cruiseoveride  Issue Monitored: cruiseoveride                    
07-17-06 02:44 Raymond        Note Added: 0011032                          
07-17-06 02:47 Raymond        Note Edited: 0011032                         
07-17-06 03:18 Raymond        Note Edited: 0011032                         
07-17-06 05:45 cruiseoveride  Note Added: 0011033                          
07-17-06 05:46 cruiseoveride  Note Edited: 0011033                         
07-17-06 07:31 Raymond        Note Added: 0011035                          
07-17-06 08:23 Raymond        Note Added: 0011036                          
07-17-06 08:26 Raymond        Note Edited: 0011036                         
07-17-06 14:48 cruiseoveride  Note Added: 0011039                          
07-17-06 14:59 cruiseoveride  Note Added: 0011040                          
07-17-06 16:07 Raymond        Note Added: 0011042                          
07-17-06 16:31 Raymond        Note Edited: 0011042                         
07-17-06 16:40 cruiseoveride  Note Added: 0011044                          
07-17-06 17:13 cruiseoveride  Note Added: 0011045                          
07-17-06 17:34 Raymond        Note Added: 0011046                          
07-17-06 17:56 cruiseoveride  Note Added: 0011047                          
07-18-06 07:44 Raymond        Note Added: 0011053                          
07-18-06 14:21 cruiseoveride  Note Added: 0011057                          
07-18-06 14:35 Raymond        Note Added: 0011060                          
07-19-06 02:52 cruiseoveride  Note Added: 0011075                          
07-19-06 03:27 Raymond        Note Added: 0011076                          
07-19-06 06:21 Raymond        Note Added: 0011080                          
07-19-06 17:43 cruiseoveride  Note Added: 0011090                          
07-19-06 17:50 cruiseoveride  File Added: chip.jpg                         
07-20-06 04:22 Raymond        Note Added: 0011107                          
07-20-06 05:01 Raymond        Note Edited: 0011107                         
07-20-06 08:05 cruiseoveride  Note Added: 0011112                          
07-20-06 08:19 Raymond        Note Added: 0011114                          
07-20-06 08:22 Raymond        Note Edited: 0011114                         
07-20-06 10:49 Raymond        Note Added: 0011116                          
07-20-06 15:52 cruiseoveride  Note Added: 0011127                          
07-20-06 16:09 Raymond        Note Added: 0011130                          
07-20-06 16:12 Raymond        Note Added: 0011131                          
07-20-06 16:35 cruiseoveride  Note Added: 0011132                          
07-20-06 16:39 cruiseoveride  Note Edited: 0011132                         
07-20-06 17:42 cruiseoveride  Note Added: 0011134                          
07-20-06 17:49 Raymond        Note Added: 0011135                          
07-20-06 17:55 Raymond        Note Edited: 0011135                         
07-20-06 19:30 Raymond        Note Added: 0011136                          
07-20-06 19:31 Raymond        Note Edited: 0011136                         
07-21-06 01:16 cruiseoveride  Note Added: 0011138                          
07-21-06 01:28 cruiseoveride  Note Added: 0011139                          
07-21-06 01:45 cruiseoveride  Note Added: 0011140                          
07-21-06 03:28 Raymond        Note Added: 0011141                          
07-21-06 20:23 cruiseoveride  Note Added: 0011155                          
07-22-06 02:13 Raymond        Note Added: 0011157                          
07-22-06 02:42 Raymond        Note Edited: 0011157                         
07-22-06 02:53 Raymond        Note Edited: 0011157                         
07-22-06 03:00 cruiseoveride  Note Added: 0011161                          
07-22-06 03:01 cruiseoveride  Note Edited: 0011161                         
07-22-06 04:12 Raymond        Note Added: 0011164                          
07-22-06 04:15 Raymond        Note Edited: 0011164                         
07-23-06 04:05 Raymond        Note Added: 0011179                          
07-23-06 06:26 cruiseoveride  Note Added: 0011181                          
07-23-06 06:41 Raymond        Note Added: 0011182                          
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