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: 07-25-2006 18:02 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 ====================================================================== ---------------------------------------------------------------------- Raymond - 07-24-06 07:48 ---------------------------------------------------------------------- Refer to the Function Block Diagram http://www.via.com.tw/en/products/audio/controllers/envy24ht/ The current alsa driver ice1724.c support differenct sound cards by checking PCI SUBSYSTEM Vendor and Device ID and enable the corresponding features of the iec1724 chip. What you need to do is to implement the ap192 card specific low level routines in ap192.c and add snd_vt1724_ap192_cards in ice1724.c static struct snd_ice1712_card_info *card_tables[] __devinitdata = { snd_vt1724_revo_cards, snd_vt1724_amp_cards, snd_vt1724_aureon_cards, snd_vt1720_mobo_cards, snd_vt1720_pontis_cards, snd_vt1724_prodigy192_cards, snd_vt1724_juli_cards, snd_vt1724_phase_cards, + snd_vt1724_ap192_cards, NULL, }; You have to read the datasheets and understand the function of those registers before you write the low level routines You can use alsa-1.0.11rc2 to learn how to install driver, lib, utils and tools if you are user. When you want to develope a new driver, you must use HG repo since the alsa developer require you to send patch against HG repo http://www.alsa-project.org/download.php ALSA HG (Mercurial) SCM repositories ---------------------------------------------------------------------- Raymond - 07-25-06 18:02 ---------------------------------------------------------------------- >> And wat is a gpio? It seem that you have not read the datasheet. 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 07-23-06 06:46 Raymond Note Edited: 0011182 07-23-06 06:47 Raymond Note Edited: 0011182 07-23-06 06:52 Raymond Note Edited: 0011182 07-23-06 06:55 Raymond Note Edited: 0011182 07-23-06 13:05 Raymond Note Edited: 0011182 07-23-06 13:11 Raymond Note Edited: 0011182 07-23-06 13:17 Raymond Note Edited: 0011182 07-23-06 13:23 Raymond Note Edited: 0011182 07-23-06 14:16 Raymond Note Added: 0011187 07-23-06 14:20 Raymond Note Edited: 0011187 07-23-06 15:24 Raymond Note Edited: 0011187 07-23-06 17:23 rlrevell Note Added: 0011190 07-23-06 17:39 Raymond Note Added: 0011191 07-23-06 17:42 Raymond Note Edited: 0011191 07-23-06 17:49 cruiseoveride Note Added: 0011192 07-23-06 17:57 cruiseoveride Note Added: 0011193 07-23-06 18:03 rlrevell Note Added: 0011194 07-23-06 18:27 cruiseoveride Note Added: 0011195 07-23-06 18:30 cruiseoveride Note Edited: 0011195 07-23-06 18:33 cruiseoveride Note Edited: 0011195 07-24-06 02:15 Raymond Note Added: 0011206 07-24-06 02:27 Raymond Note Edited: 0011206 07-24-06 02:28 Raymond Note Edited: 0011206 07-24-06 07:12 Raymond Note Edited: 0011206 07-24-06 07:48 Raymond Note Edited: 0011206 07-25-06 18:02 Raymond Note Added: 0011230 ====================================================================== ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
