A NOTE has been added to this issue. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2287> ====================================================================== 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 ---------------------------------------------------------------------- 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 ====================================================================== ------------------------------------------------------------------------- Take Surveys. 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