[alsa-devel] aplay: xrun:1104: read/write error ???

[Takashi Iwai]

At Tue, 13 Nov 2007 05:43:37 +0000,
 wrote:
> 
> 
> Hi All:
>      im using aplay from ALSA-1.0.15 to play music through bluetooth a2dp. im using montavista 2.6.18 on ARM9 platform.
>      I got an "aplay: xrun:1104: read/write error, state = RUNNING" error after the music has been played for one second or two.  Could someone tell me how this happened?

It implies that the write returns -EPIPE that indicates XRUN, but the
state is still set as RUNNING.  Something is inconsistent in the
plugin, I guess.


Takashi

> Here's the command that i use :
> 
> aplay -v -D bluetooth /1.wav
> 
> 
> And the message log is as follows:
> 
> /$ aplay -v -D bluetooth /1.wav
> 
> audio[842]: Accepted new client connection on unix socket (fd=8)
> audio[842]: Package PKT_TYPE_CFG_REQ:0
> audio[842]: avdtp_ref(0x3c990): ref=2
> audio[842]: a2dp_source_request_stream: selected SEP 0x3c218
> audio[842]: avdtp_ref(0x3c990): ref=3
> hcid[828]: link_key_request (sba=00:80:E1:00:AB:BA, dba=00:0D:3C:EB:53:F0)
> audio[842]: AVDTP: connected signaling channel to 00:0D:3C:EB:53:F0
> audio[842]: session_cb
> audio[842]: DISCOVER request succeeded
> audio[842]: seid 1 type 1 media 0 in use 0
> audio[842]: seid 2 type 1 media 0 in use 0
> audio[842]: session_cb
> audio[842]: GET_CAPABILITIES request succeeded
> audio[842]: seid 1 type 1 media 0
> hcid[828]: link_key_request (sba=00:80:E1:00:AB:BA, dba=00:0D:3C:EB:53:F0)
> hcid[828]: link_key_request (sba=00:80:E1:00:AB:BA, dba=00:0D:3C:EB:53:F0)
> audio[842]: session_cb
> audio[842]: GET_CAPABILITIES request succeeded
> audio[842]: seid 2 type 1 media 0
> audio[842]: Discovery complete
> audio[842]: avdtp_set_configuration(0x3c990): int_seid=1, acp_seid=1
> audio[842]: session_cb
> audio[842]: SET_CONFIGURATION request succeeded
> audio[842]: SBC Source: Set_Configuration_Cfm
> audio[842]: avdtp_ref(0x3c990): ref=4
> audio[842]: stream state changed: IDLE -> CONFIGURED
> audio[842]: session_cb
> audio[842]: OPEN request succeeded
> audio[842]: stream state changed: CONFIGURED -> OPEN
> audio[842]: AVDTP: connected transport channel to 00:0D:3C:EB:53:F0
> audio[842]: SBC Source: Open_Cfm
> audio[842]: session_cb
> audio[842]: START request succeeded
> audio[842]: SBC Source: Start_Cfm
> audio[842]: SBC Source SEP 0x3c218 locked
> audio[842]: fd=10, fd_opt=1, pkt_len=672, sample_size=2, rate=44100
> audio[842]: 34 bytes sent
> audio[842]: 1 bytes sent
> audio[842]: avdtp_unref(0x3c990): ref=3
> audio[842]: stream state changed: OPEN -> STREAMING
> Playing WAVE '/1.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
> Bluetooth Audio Device
> Its setup is:
> stream : PLAYBACK
> access : RW_INTERLEAVED
> format : S16_LE
> subformat : STD
> channels : 2
> rate : 44100
> exact rate : 44100 (44100/1)
> msbits : 16
> buffer_size : 6400
> period_size : 128
> period_time : 2902
> tick_time : 0
> tstamp_mode : NONE
> period_step : 1
> sleep_min : 0
> avail_min : 128
> xfer_align : 128
> start_threshold : 6400
> stop_threshold : 6400
> silence_threshold: 0
> silence_size : 0
> boundary : 1677721600
> hcid[828]: link_key_request (sba=00:80:E1:00:AB:BA, dba=00:0D:3C:EB:53:F0)
> Status(R/W):
> state : RUNNING
> trigger_time: 24.586883000
> tstamp : 0.000000
> delay : 0
> avail : 6912
> avail_max : 6912
> aplay: xrun:1104: read/write error, state = RUNNING      ---------------->>>>> this is where this error happens
> audio[842]: Unix client disconnected (fd=8)
> audio[842]: SBC Source SEP 0x3c218 unlocked
> audio[842]: avdtp_unref(0x3c990): ref=2
> 
> 
> 
> thanks
> 
> 
> semiyd
> 
> 
> 
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