From: Luca Pizzamiglio <pizzamiglio@cefriel.it>
To: bluez-devel@lists.sourceforge.net
Subject: [Bluez-devel] SCO & btsco
Date: Wed, 14 Sep 2005 09:51:06 +0200 [thread overview]
Message-ID: <4327D66A.1030304@cefriel.it> (raw)
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Hi to all.
I'm using btsco with a headset and it works very well.
Now I'm trying to record audio from another bt device (es. a phone):
using socket SCO interface I read data and I write it in a file (sound.raw);
I'm trying to understand what audio formats I receive.
bt specification says that bluetooth supports three audio formats:
- - CVSD
- - u-law
- - a-law
hciconfig hci0 voice command reports:
hci0: Type: USB
BD Address: 00:09:DD:10:4C:C6 ACL MTU: 192:8 SCO MTU: 64:8
Voice setting: 0x0060 (Default Condition)
Input Coding: Linear
Input Data Format: 2's complement
Input Sample Size: 16 bit
# of bits padding at MSB: 0
Air Coding Format: CVSD
I see from btsco sources that btsco support only mu-law format (it is a
comment), but the code check if voice setting is equal to 0x0060 (CVSD).
So, btsco support CVSD? There's a CVSD codec in btsco source code or I
have to implement a Bluez CVSD codec?
Cheers,
Pizza
- -------------------------------------------
Luca Pizzamiglio
CEFRIEL - Embedded Systems Design Unit
Via Fucini, 2 - 20133 MILANO (ITALY)
Phone: +39 02 23954 343
e-mail: pizzamiglio@cefriel.it
ICQ: 5046978
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next reply other threads:[~2005-09-14 7:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-14 7:51 Luca Pizzamiglio [this message]
2005-09-14 11:36 ` [Bluez-devel] SCO & btsco Steven Singer
2005-09-14 13:21 ` Luca Pizzamiglio
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