Re: can't use dmixer

[feng_tian <feng_tian@126.com>]

I updated my ALSA driver, libs and utils to 1.0.15, but when I use dmix of aplay, it still complaints the error:

ALSA lib pcm_direct.c:790:(snd_pcm_direct_initialize_slave) slave plugin does not support mmap interleaved or mmap noninterleaved access
ALSA lib pcm_dmix.c:864:(snd_pcm_dmix_open) unable to initialize slave
aplay: main:547: audio open error: Invalid argument

I don't think that it's sound card doesn't support this mmap. Dmix is a soft mixer, right? So where should I start to fix this problem.
Any comments or advices are welcome.

BR
Feng




 
 

在2007-12-05，"Tobin Davis" <tdavis@dsl-only.net> 写道：

First and foremost, you are running on a version that is really old (by
Linux standards).  The current release is 1.0.15.  I'd suggest upgrading
and seeing if that solves your issue.  Repost if it doesn't.

Tobin

On Wed, 2007-12-05 at 14:23 +0800, feng_tian wrote:

> Hi, all:
> I have a problem with dmix of alsa. 
> I'm using alsa v1.0.11rc2 now. And make it running on ATMEL AT91SAM9260EK board. It runs ok without Dmix. But when I tried:
> bash> aplay -D dmixer test.wav
> The errors are:
> 
> ALSA lib pcm_direct.c:790:(snd_pcm_direct_initialize_slave) slave plugin does not support mmap interleaved or mmap noninterleaved access
> ALSA lib pcm_dmix.c:864:(snd_pcm_dmix_open) unable to initialize slave
> aplay: main:547: audio open error: Invalid argument
> 
> The configuration of my alsa in /etc/asound.con is:
> 
> pcm.card0 {
> 	type hw
> 	card 0
> 	}
> 	
> pcm.!default {
> 	type plug
> 	slave.pcm "dmixer"
> 	}
> 	
> pcm.dmixer {
> 	type dmix
> 	ipc_key 1024
> 	slave {
> 		pcm "hw:0,0"
> 		format S16_LE
> 		period_time 0
> 		period_size 1024
> 		buffer_size 4096
> 		
> 		rate 22050 
> 		}
> 	bindings {
> 		0 0
> 		1 1
> 		}
> 	}
> ctl.dmixer {
> 	type hw
> 	card 0
> 	device 0
> 	}
> pcm.dsp {
> 	type plug
> 	slave.pcm "dmixer" #use our new PCM here
> 	}
> ctl.mixer{
> 	type hw
> 	card 0
> 	}
> bash> aplay -L
> gives:
> 
> PCM list:
> hw {
> 	@args.0 CARD
> 	@args.1 DEV
> 	@args.2 SUBDEV
> 	@args.CARD {
> 		type string
> 		default {
> 			@func getenv
> 			vars {
> 				0 ALSA_PCM_CARD
> 				1 ALSA_CARD
> 			}
> 			default {
> 				@func refer
> 				name 'defaults.pcm.card'
> 			}
> 		}
> 	}
> 	@args.DEV {
> 		type integer
> 		default {
> 			@func igetenv
> 			vars {
> 				0 ALSA_PCM_DEVICE
> 			}
> 			default {
> 				@func refer
> 				name 'defaults.pcm.device'
> 			}
> 		}
> 	}
> 	@args.SUBDEV {
> 		type integer
> 		default {
> 			@func refer
> 			name 'defaults.pcm.subdevice'
> 		}
> 	}
> 	type hw
> 	card $CARD
> 	device $DEV
> 	subdevice $SUBDEV
> }
> plughw {
> 	@args.0 CARD
> 	@args.1 DEV
> 	@args.2 SUBDEV
> 	@args.CARD {
> 		type string
> 		default {
> 			@func getenv
> 			vars {
> 				0 ALSA_PCM_CARD
> 				1 ALSA_CARD
> 			}
> 			default {
> 				@func refer
> 				name 'defaults.pcm.card'
> 			}
> 		}
> 	}
> 	@args.DEV {
> 		type integer
> 		default {
> 			@func igetenv
> 			vars {
> 				0 ALSA_PCM_DEVICE
> 			}
> 			default {
> 				@func refer
> 				name 'defaults.pcm.device'
> 			}
> 		}
> 	}
> 	@args.SUBDEV {
> 		type integer
> 		default {
> 			@func refer
> 			name 'defaults.pcm.subdevice'
> 		}
> 	}
> 	type plug
> 	slave.pcm {
> 		type hw
> 		card $CARD
> 		device $DEV
> 		subdevice $SUBDEV
> 	}
> }
> plug {
> 	@args.0 SLAVE
> 	@args.SLAVE {
> 		type string
> 	}
> 	type plug
> 	slave.pcm $SLAVE
> }
> shm {
> 	@args.0 SOCKET
> 	@args.1 PCM
> 	@args.SOCKET {
> 		type string
> 	}
> 	@args.PCM {
> 		type string
> 	}
> 	type shm
> 	server $SOCKET
> 	pcm $PCM
> }
> tee {
> 	@args.0 SLAVE
> 	@args.1 FILE
> 	@args.2 FORMAT
> 	@args.SLAVE {
> 		type string
> 	}
> 	@args.FILE {
> 		type string
> 	}
> 	@args.FORMAT {
> 		type string
> 		default raw
> 	}
> 	type file
> 	slave.pcm $SLAVE
> 	file $FILE
> 	format $FORMAT
> }
> file {
> 	@args.0 FILE
> 	@args.1 FORMAT
> 	@args.FILE {
> 		type string
> 	}
> 	@args.FORMAT {
> 		type string
> 		default raw
> 	}
> 	type file
> 	slave.pcm null
> 	file $FILE
> 	format $FORMAT
> }
> null {
> 	type null
> }
> cards 'cards.pcm'
> front 'cards.pcm.front'
> rear 'cards.pcm.rear'
> center_lfe 'cards.pcm.center_lfe'
> side 'cards.pcm.side'
> surround40 'cards.pcm.surround40'
> surround41 'cards.pcm.surround41'
> surround50 'cards.pcm.surround50'
> surround51 'cards.pcm.surround51'
> surround71 'cards.pcm.surround71'
> iec958 'cards.pcm.iec958'
> spdif 'cards.pcm.iec958'
> modem 'cards.pcm.modem'
> phoneline 'cards.pcm.phoneline'
> dmix 'cards.pcm.dmix'
> dsnoop 'cards.pcm.dsnoop'
> card0 {
> 	type hw
> 	card 0
> }
> default {
> 	type plug
> 	slave.pcm dmixer
> }
> dmixer {
> 	type dmix
> 	ipc_key 1024
> 	slave {
> 		pcm 'hw:0,0'
> 		format S16_LE
> 		period_time 0
> 		period_size 1024
> 		buffer_size 4096
> 		rate 22050
> 	}
> 	bindings {
> 		0 0
> 		1 1
> 	}
> }
> dsp {
> 	type plug
> 	slave.pcm dmixer
> }
> Is there anyone experienced in this kind of error?  Any helps or advices is wecome.
> 
> BR
> Feng
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-- 
Tobin Davis  


I'm having a tax-deductible experience!  I need an energy crunch!!
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