Hi,
Here's series of patches which adds decoding of AVDTP signalling channel
and A2DP codec capabilities information. Few things are missing:
- no fragmentation support
- some rarely used capabilities are not decoded
- ATRAC capabilities are not decoded
Other that above, pretty much everything should be decoded.
And some sample output from decoder:
< ACL Data TX: Handle 256 flags 0x00 dlen 6
Channel: 1602 len 2 [PSM 25 mode 0] {chan 2}
AVDTP: Discover (0x01) Command: type 0x00 label 6 nosp 0
> ACL Data RX: Handle 256 flags 0x02 dlen 14
Channel: 66 len 10 [PSM 25 mode 0] {chan 2}
AVDTP: Discover (0x01) Response Accept: type 0x00 label 6 nosp 0
ACP SEID 1
Media Type: Audio
SEP Type: SRC
In use: No
ACP SEID 5
Media Type: Audio
SEP Type: SRC
In use: No
ACP SEID 3
Media Type: Audio
SEP Type: SRC
In use: No
ACP SEID 2
Media Type: Audio
SEP Type: SRC
In use: No
< ACL Data TX: Handle 256 flags 0x00 dlen 7
Channel: 1602 len 3 [PSM 25 mode 0] {chan 2}
AVDTP: Get Capabilities (0x02) Command: type 0x00 label 9 nosp 0
ACP SEID: 3
> ACL Data RX: Handle 256 flags 0x02 dlen 23
Channel: 66 len 19 [PSM 25 mode 0] {chan 2}
AVDTP: Get Capabilities (0x02) Response Accept: type 0x00 label 9 nosp 0
Service Category: Media Transport
Service Category: Media Codec
Media Type: Audio
Media Codec: Non-A2DP
Vendor ID: 0x0000004f (APT Licensing Ltd.)
Vendor Specific Codec ID: 0x0001 (aptX)
Frequency: 0x30
44100
48000
Channel Mode: 0x02
Stereo
Service Category: Content Protection
Content Protection Type: SCMS-T
< ACL Data TX: Handle 256 flags 0x00 dlen 18
Channel: 1602 len 14 [PSM 25 mode 0] {chan 2}
AVDTP: Set Configuration (0x03) Command: type 0x00 label 11 nosp 0
ACP SEID: 1
INT SEID: 1
Service Category: Media Transport
Service Category: Media Codec
Media Type: Audio
Media Codec: SBC
Frequency: 0x20
44100
Channel Mode: 0x01
Joint Channel
Block Length: 0x10
16
Subbands: 0x04
8
Allocation Method: 0x01
Loudness
Minimum Bitpool: 2
Maximum Bitpool: 53
> ACL Data RX: Handle 256 flags 0x02 dlen 6
Channel: 66 len 2 [PSM 25 mode 0] {chan 2}
AVDTP: Set Configuration (0x03) Response Accept: type 0x00 label 11 nosp 0
> ACL Data RX: Handle 256 flags 0x02 dlen 6
Channel: 66 len 2 [PSM 25 mode 0] {chan 2}
AVDTP: Open (0x06) Response Accept: type 0x00 label 12 nosp 0
< ACL Data TX: Handle 256 flags 0x00 dlen 7
Channel: 1602 len 3 [PSM 25 mode 0] {chan 2}
AVDTP: Start (0x07) Command: type 0x00 label 13 nosp 0
ACP SEID: 1
> ACL Data RX: Handle 256 flags 0x02 dlen 6
Channel: 66 len 2 [PSM 25 mode 0] {chan 2}
AVDTP: Start (0x07) Response Accept: type 0x00 label 13 nosp 0
Andrzej Kaczmarek (22):
monitor/l2cap: Add channel sequence number
monitor/avdtp: Add basic decoding of AVDTP signalling
monitor/avdtp: Decode AVDTP_DISCOVER
monitor/avdtp: Decode AVDTP_GET_CAPABILITIES
monitor/avdtp: Decode AVDTP_SET_CONFIGURATION
monitor/avdtp: Decode AVDTP_GET_CONFIGURATION
monitor/avdtp: Decode AVDTP_RECONFIGURE
monitor/avdtp: Decode AVDTP_OPEN
monitor/avdtp: Decode AVDTP_START
monitor/avdtp: Decode AVDTP_CLOSE
monitor/avdtp: Decode AVDTP_SUSPEND
monitor/avdtp: Decode AVDTP_ABORT
monitor/avdtp: Decode AVDTP_SECURITY_CONTROL
monitor/avdtp: Decode AVDTP_GET_ALL_CAPABILITIES
monitor/avdtp: Decode AVDTP_DELAYREPORT
monitor/avdtp: Decode basic Media Codec capabilities
monitor/avdtp: Decode basic Content Protection capabilities
monitor/a2dp: Decode SBC capabilities
monitor/a2dp: Decode MPEG-1,2 capabilities
monitor/a2dp: Decode AAC capabilities
monitor/a2dp: Decode aptX capabilities
monitor/a2dp: Decode LDAC capabilities
Makefile.tools | 2 +
android/Android.mk | 2 +
monitor/a2dp.c | 420 +++++++++++++++++++++++++++
monitor/a2dp.h | 24 ++
monitor/avdtp.c | 819 +++++++++++++++++++++++++++++++++++++++++++++++++++++
monitor/avdtp.h | 24 ++
monitor/l2cap.c | 48 +++-
monitor/l2cap.h | 1 +
8 files changed, 1327 insertions(+), 13 deletions(-)
create mode 100644 monitor/a2dp.c
create mode 100644 monitor/a2dp.h
create mode 100644 monitor/avdtp.c
create mode 100644 monitor/avdtp.h
--
2.6.2
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