[X]Assistant

[mister syslik]

ValdikSS @ 08/20/18, 1:50

I'm more interested in iOS

You will not be able to dig deep into iOS, the system is closed and this data is located behind a concrete wall, which unfortunately cannot be circumvented

[ValdikSS]

pgasa007,
alexnen
Write the exact phone model, the exact firmware and build version.

[pgasa007]

ValdikSS, phone: Leeco le2, firmware: LineageOs 15.1-20180819-unofficial-s2

Post has been editedpgasa007 - 20.08.18, 15:18

[Sparrer]

I would participate, but not in my Huawei Ascend (Android 4.0.3) library /system/lib/hw/bluetooth.default.so. How else can she be called and where to lie?

[ValdikSS]

pgasa007,
Android 8.1 is difficult to patch due to the fact that there are many optimizations and all the functions inline. Yesterday, a lot of time was spent on test patches, but none of them earned. For now, I’ll confine Android 5-7.
Use the test method on the computer.

In the second message added patched libraries for some devices.

[ValdikSS]

alexnen
See second post.

[ValdikSS]

Sparrer,
On Android 4.0.3, the BlueZ Linux stack is used, not the Bluedroid Android stack. I did not understand it.

[alexnen]

ValdikSSPhone Redmi 3s, android 6.01 mmb29m miui global 9.6.1.0

Post has been editedalexnen - 20.08.18, 19:34

[ValdikSS]

alexnen
Thank you, in the second message uploaded the file.

[ivs1966]

ValdikSS,I tested Bluedio T3 on a PC with a Chinese BT adapter CSR 4.0 (I took it on Ali). Lost all 7 songs, cod, interrupts, distortions - no. Traffic dump below. What do you say for the A2DP specification and in general?btsnoop_hci.zip(13.57 MB)

[ValdikSS]

ivs1966,
The same problem as with other Bluedio headphones - they report that they do not support Dual Channel and some other parameters that do not conform to the specification (everything must be supported by the specification). But at the same time, if the Dual Channel is forcibly coordinated, then they work in this mode.
Under normal use, problems most likely will not arise, but such headphones would not pass and would not pass certification.

The computer matched the usual low-bit stereo (not Dual Channel). The patches I make for Android will forcibly reconcile the Dual Channel (this makes it easier to change the compiled libraries).

Post has been editedValdikSS - 20.08.18, 20:10

[alexnen]

Made a test for Xiaomi Redmi 3s with headphones Edifer W830BT. Results uploaded. Subjectively, the sound is more saturated, distortion
no, only when using bluetooth.default.so_unrestricted a couple of times there was an interruption.

I listened more - of course, when in the version without limitation, when listening to guitar compositions there is distortion at high frequencies in the form of clicks and whistles.

Post has been editedalexnen - 21.08.18, 12:03

[pgasa007]

bluetooth.default.7z(727.06 KB)
Leeco le2 EUI 5.9.26s. android6

[gipro2]

ValdikSS,
I downloaded the archive for xiaomi redmi 4 prime, unpacked, fixed the extension and replaced the file in the specified folder. bluetooth has stopped turning on. Replaced with a file from the backup - everything works again. Chyadt?

[mccool]

gipro2, I had it on redmi 4, in the properties of the file, which replaced the permissions rw r r

[gipro2]

mccooldid not help...

[mccool]

gipro2, after the change of rights rebooted?

[ValdikSS]

alexnen
I see your dumps, the first bit rate agreed 474 kbit / s. Interruptions, whistles and clicks were not with _482, problems were only with unrestricted?

Posted 08/21/2018 1:30 PM:

gipro2,
Probably, this library is not suitable for your version of the OS or a specific assembly, so the Bluetooth stack cannot start.

[ValdikSS]

pgasa007,
Added to the second post.

[gipro2]

ValdikSSprobably is. I will add my own - Xiaomi Redmi 4 pro, firmware MIUI 9 android 6 (miuipro 8.4.26).bluetooth.default.so.zip(874.36 KB)