[Bluez-users] Can an embeded development board emulate a headphone?

[黄理洪 <peterlihong@gmail.com>]

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Hi All:
     Im using ALSA 1.0.15 and bluez 3.27 and linux 2.6.22. They are running
on two embeded development boards, one board acting as a computer and
the other as a headphone.
     When i tried to use 'aplay' to connect the headphone board from my
computer board, i got the following error:

# aplay -D bluetooth
/home/lhhuang/BlueZ/dadi.wav

# audio[806]: Accepted new client connection on unix socket
(fd=8)
audio[806]: Audio API: received
BT_GETCAPABILITIES_REQ

audio[806]: Got path /org/bluez/hci0 for adapter with address
00:18:E4:0A:E8:B2
audio[806]: /org/bluez/hci0 GetRemoteName(): Not
available
audio[806]: Audio service discovery completed with
success
audio[806]: Found Audio
Sink

audio[806]: Found AV
Target

audio[806]: Found AV
Remote

audio[806]: Selecting default
device

audio[806]: avdtp_ref(0x48c4b8):
ref=2

Passkey request for device
00:18:E4:0A:E8:BE

audio[806]: AVDTP: connected signaling channel to
00:18:E4:0A:E8:BE
audio[806]: AVCTP: connected to
00:18:E4:0A:E8:BE

audio[806]: Can't open input device: No such file or directory
(2)
audio[806]: AVRCP: failed to init uinput for 00:18:E4:0A:E8:BE
audio[806]: session_cb
audio[806]: DISCOVER request succeeded
audio[806]: seid 1 type 0 media 0 in use 0
audio[806]: session_cb
audio[806]: GET_CAPABILITIES request succeeded
audio[806]: seid 1 type 0 media 0
audio[806]: Audio API: sending BT_GETCAPABILITIES_RSP
Playing WAVE '/home/lhhuang/BlueZ/dadi.wav' : Signed 16 bit Little Endian,
Rate 44100 Hz, Stereo
audio[806]: Audio API: received BT_SETCONFIGURATION_REQ
audio[806]: config a2dp - device = 00:18:E4:0A:E8:BE access_mode = 2
audio[806]: codec sbc - frequency = 2 channel_mode = 1 allocation = 1
subbands = 1 blocks = 1 bitpool = 53
audio[806]: a2dp_source_config: selected SEP 0x486318
audio[806]: avdtp_ref(0x48c4b8): ref=3
audio[806]: setup_ref(0x48bfd0): ref=1
*audio[806]: No matching ACP and INT SEPs found*
audio[806]: setup_unref(0x48bfd0): ref=0
audio[806]: setup_free(0x48bfd0)
audio[806]: avdtp_unref(0x48c4b8): ref=2
audio[806]: config failed
audio[806]: Audio API: sending BT_SETCONFIGURATION_RSP
*ALSA lib pcm_bluetooth.c:708:(bluetooth_a2dp_hw_params) BT_SETCONFIGURATION
failed : Input/output error(5)
aplay: set_params:962: Unable to install hw params:*

ACCESS:
RW_INTERLEAVED

FORMAT:
S16_LE

SUBFORMAT:
STD

SAMPLE_BITS:
16

FRAME_BITS:
32

CHANNELS:
2

RATE: 44100
PERIOD_TIME: (46439
46440)

PERIOD_SIZE:
2048

PERIOD_BYTES:
8192

PERIODS:
3

BUFFER_TIME: (139319
139320)

BUFFER_SIZE:
6144

BUFFER_BYTES:
24576

TICK_TIME: [0
0]

audio[806]: Unix client disconnected
(fd=8)
audio[806]: avdtp_unref(0x48c4b8):
ref=1

audio[806]: AVCTP session 0x4880b8 got
disconnected
audio[806]:
session_cb

audio[806]: Disconnected from
00:18:E4:0A:E8:BE

audio[806]: avdtp_unref(0x48c4b8):
ref=0

audio[806]: avdtp_unref(0x48c4b8): freeing session and removing from list
Can an embeded development board emulate a headphone using BlueZ at the
moment?
Thanks in advance!

Peter
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