[Pianod] Music doesn't start when launched at startup

[Perette Barella]

Hi guys,

You're right about the ao_default_driver_id.
	if (audioOutDriver < 0) {
		audioOutDriver = ao_default_driver_id();
+		if (audioOutDriver < 0) {
+			BarUiMsg (player->settings, MSG_ERR, "No audio driver available\n");
+			return NULL;
+		}
	}


But if taking the play out of the startscript didn't work for GoneWest, there must be something more.  Is it dropping a core?  If you ./configure --enable-debug, it compiles with -g and you should get core dumps suitable for loading into GDB to find out exactly where it's dying.

Perette


On 2013年05月07日, at 1:00, pi.gonewest at xoxy.net wrote:

> 
> Chinasaur and I have been discussing this same issue on the Raspberry Pi forums. (http://www.raspberrypi.org/phpBB3/viewtopic.php?f=35&t=37494&p=344130#p344130)
> 
> In my case if I setup pianod to play immediately upon launching it fails, but if I immediately restart the service without changing anything else playback works fine.  My thought is the daemon is trying to play before the audio driver is completely ready.
> 
> So I'm going to try two things:
> 
> (1) remove the "play" command from my startscript.  Looks to me like pianod doesn't try opening a playback channel until it needs to play a song, so if I boot with pianod in an idle state then I can choose how long to wait before selecting a station.
> 
> (2) change the player logic.  BarPlayerOpenAudioOut(). The function calls
> 
> if (audioOutDriver < 0) {
>       audioOutDriver = ao_default_driver_id();
> }
> 
> but according to the libao documentation, ao_default_driver_id() can return -1 if there is no usable audio output device. There's some logic that assumes it's possible to fall back to a "default" device but in my case I'm already using the default.   I want to see if there's some way to detect this case and fail more gracefully, e.g. pause and retry or something along those lines.
> 
> 
> 
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