Further information. The behaviour was caused by the default iec958.conf file. I removed the entries that set the AES bits and it stopped pouncing on my settings. I can only say I wish there was some way through the API to restrain the pcm_hooks plugin.
-----Original Message----- From: alsa-devel-bounces@alsa-project.org
[mailto:alsa-devel-bounces@alsa-
project.org] On Behalf Of Bouterse, Bob Sent: Tuesday, March 18, 2008 11:32 AM To: alsa-devel@alsa-project.org Subject: [alsa-devel] Having a fight withsnd_sctl_install:src/control/setup.c in alsa-lib-1.0.14a
I am using alsa-lib-1.0.14a on a VIA EPIA 15000g board.
I am hoping that someone can help me. I have been in an entrenched
fight
with the sctl functions setting my ctl setting back to the config file values.
I am working on some extensions to the alsa audio output plugins in
xine
to provide simultaneous analog and iec958 on a Via EPIA 15000g, board.
The issue is that I need to set the iec958 status bits at runtime, but everytime I call:
/*----------------------------------------------------------------------
-----*/ ...
snd_ctl_elem_value_get_iec958(cval, &iec958); llprintf(LOG_MIXER,"Read AES0=0x%02x,AES1=0x%02x,AES2=0x%02x,AES3=0x%02x\n", iec958.status[0], iec958.status[1], iec958.status[2], iec958.status[3]);
/* AES0=0x6,AES1=0x82,AES2=0x0,AES3=0x2 */ iec958.status[0] = IEC958_AES0_NONAUDIO | IEC958_AES0_CON_NOT_COPYRIGHT; iec958.status[1] = IEC958_AES1_CON_PCM_CODER | IEC958_AES1_CON_ORIGINAL; iec958.status[2] = 0x00; iec958.status[3] = IEC958_AES3_CON_FS_48000;
llprintf(LOG_MIXER,"Writing AES0=0x%02x,AES1=0x%02x,AES2=0x%02x,AES3=0x%02x\n", iec958.status[0], iec958.status[1], iec958.status[2], iec958.status[3]);
/* store the values */ snd_ctl_elem_value_set_iec958(cval, &iec958); if ((err = snd_ctl_elem_write(ctl_handle, cval)) < 0) { xprintf (this->class->xine, XINE_VERBOSITY_DEBUG, "snd_ctl_elem_write(): %s\n", snd_strerror(err)); }
...
/*----------------------------------------------------------------------
-----*/ snd_sctl_install resets the IEC958 status bits back to the original values!
I am pulling my hair out trying to understand how to stop this.
Unfortunately I don't have much time to fix this, please help.
Bob Bouterse Sr. Software Engineer Office of the CTO D&M Holdings Inc. 1-317-616-6541 (fax) 1-317-616-6541 _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel