At Tue, 18 Sep 2007 09:41:48 +0200 (CEST), Anders Boström wrote:
"TI" == Takashi Iwai tiwai@suse.de writes:
Hi!
Hi all,
can one please have a lokk at this? aplay -N isn't working for the OP.
TI> Cannot reproduce here. Could you _post_ more details?
OK, I've tested more, and discovered that the problem seems to be that the end of the sound is cut in non-blocking mode. And if I play a very short sound-file, I can't hear anything. Blocking mode works fine.
When using non-blocking mode, an strace contains "ioctl(4, 0x4144, 0x2b9f785d8000) = -1 EAGAIN (Resource temporarily unavailable)". Blocking mode never contains the EAGAIN response.
I attach two files. When playing halt.au, I can only hear the start, about as much as "ha". When playing metal.au, I can't hear anything.
OK, thanks, I see the problem now.
I don't remember whether it's a feature or a bug. The drain ioctl rejects the non-block mode.
Anyway, a simple patch is below. Let me know if it works.
Takashi
diff -r 0028e39ead78 core/pcm_native.c --- a/core/pcm_native.c Tue Sep 18 00:52:38 2007 +0200 +++ b/core/pcm_native.c Tue Sep 18 17:44:31 2007 +0200 @@ -1368,8 +1368,6 @@ static int snd_pcm_prepare(struct snd_pc
static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) { - if (substream->f_flags & O_NONBLOCK) - return -EAGAIN; substream->runtime->trigger_master = substream; return 0; }