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Wizard
Posts: 2,808
Karma: 7423683
Join Date: May 2016
Location: Ontario, Canada
Device: Kobo Mini, Aura Edition 2 v1, Clara HD
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Quote:
Originally Posted by davidfor
Yes, very sure.
I asked about the apparent audio support and was given a very firm no. But I was told Bluetooth would be used for pairing keyboards. I questioned that as I had not seen any reference to this before. I am not sure, but I don't I think that it is in the firmware that was on the few review devices, but it is in the firmware that has been discovered.
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I do indeed see stuff which looks for HID devices, but the thing is, that same code also looks for audio devices (and they're both over DBus, so I don't think it's for other devices). Now, since I do see AVRCP-related stuff, one possibility is that they're planning to allow audio devices to be paired to use their keys to control book pagination. That would fit in with the large amount of new stuff related to key debugging. And, the devs might have experimented with audio for fun (it might be possible to make use of it if they leave that code in the final version, though). Or, alternatively, whatever they're using for BT might have a GStreamer dependency to support AVRCP.
Either way, none of it will actually be usable right now since it isn't connected to the UI, and the Bluetooth DBus daemon isn't shipped (at least in the firmware update).
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I think I might be able to dig up what the AVRCP key stuff is for though, which should clear things up a bit. For anyone interested, here's the hex I need to figure out the encoding of to be able to give a more confident response about what the A2DP and AVRCP stuff is for:
I think it's https://doc.qt.io/qt-5/qmap.html, so I'll probably just try reading it from a QDataStream.
Edit 3: Hmm, it's not a plain QMap. I'm going to have to put a bit more effort into this.
Edit 4: So, it appears to have a header composed of a few int32s, then an array of structs containing int16s, int8s, and int32s. I'll have put something together to decode them, then figure out what they mean.
Edit 5: Here's a quick dump. I'll need to do some guessing and/or cross-reference against /usr/local/Kobo/generic/libkeys.so.
Spoiler:
Code:
000 struct { Magic int32; H2 int32; H3 int32; H4 int32 }{Magic:1364017488, H2:1, H3:38, H4:0}
016 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:353, B:-1, C:16842752, D:0, E:0, F:0}
028 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:103, B:-1, C:16777235, D:0, E:0, F:0}
040 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:108, B:-1, C:16777237, D:0, E:0, F:0}
052 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:105, B:-1, C:16777234, D:0, E:0, F:0}
064 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:106, B:-1, C:16777236, D:0, E:0, F:0}
076 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:139, B:-1, C:16777301, D:0, E:0, F:0}
088 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:362, B:-1, C:16777360, D:0, E:0, F:0}
100 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:364, B:-1, C:16777361, D:0, E:0, F:0}
112 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:174, B:-1, C:16777216, D:0, E:0, F:0}
124 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:11, B:-1, C:48, D:0, E:0, F:0}
136 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:2, B:-1, C:49, D:0, E:0, F:0}
148 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:3, B:-1, C:50, D:0, E:0, F:0}
160 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:4, B:-1, C:51, D:0, E:0, F:0}
172 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:5, B:-1, C:52, D:0, E:0, F:0}
184 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:6, B:-1, C:53, D:0, E:0, F:0}
196 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:7, B:-1, C:54, D:0, E:0, F:0}
208 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:8, B:-1, C:55, D:0, E:0, F:0}
220 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:9, B:-1, C:56, D:0, E:0, F:0}
232 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:10, B:-1, C:57, D:0, E:0, F:0}
244 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:52, B:-1, C:46, D:0, E:0, F:0}
256 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:28, B:-1, C:16777221, D:0, E:0, F:0}
268 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:402, B:-1, C:16777496, D:0, E:0, F:0}
280 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:403, B:-1, C:16777497, D:0, E:0, F:0}
292 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:405, B:-1, C:16842751, D:0, E:0, F:0}
304 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:171, B:-1, C:16777481, D:0, E:0, F:0}
316 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:358, B:-1, C:16777481, D:0, E:0, F:0}
328 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:356, B:-1, C:16777216, D:0, E:0, F:0}
340 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:115, B:-1, C:16777330, D:0, E:0, F:0}
352 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:114, B:-1, C:16777328, D:0, E:0, F:0}
364 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:113, B:-1, C:16777329, D:0, E:0, F:0}
376 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:200, B:-1, C:16777344, D:0, E:0, F:0}
388 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:166, B:-1, C:16777345, D:0, E:0, F:0}
400 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:201, B:-1, C:16777349, D:0, E:0, F:0}
412 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:163, B:-1, C:16777347, D:0, E:0, F:0}
424 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:165, B:-1, C:16777346, D:0, E:0, F:0}
436 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:167, B:-1, C:16777348, D:0, E:0, F:0}
448 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:168, B:-1, C:16777413, D:0, E:0, F:0}
460 struct { A int16; B int16; C int32; D int8; E int8; F int16 }{A:208, B:-1, C:16777474, D:0, E:0, F:0}
472 EOF
Code:
package main
import (
"encoding/binary"
"fmt"
"io"
"os"
)
func main() {
f, err := os.Open("/home/patrick/src/qrc/test/17623/keys/avrcp.qmap")
if err != nil {
panic(err)
}
defer f.Close()
var hdr struct {
Magic int32
H2 int32
H3 int32
H4 int32
}
if off, err := f.Seek(0, io.SeekCurrent); err != nil {
panic(err)
} else {
fmt.Printf("% 04d ", off)
}
if err := binary.Read(f, binary.BigEndian, &hdr); err != nil {
panic(err)
}
fmt.Printf("%#v\n", hdr)
for {
var it struct {
A int16
B int16
C int32
D int8
E int8
F int16
}
if off, err := f.Seek(0, io.SeekCurrent); err != nil {
panic(err)
} else {
fmt.Printf("% 04d ", off)
}
if err := binary.Read(f, binary.BigEndian, &it); err == io.EOF {
fmt.Printf("EOF\n")
break
} else if err != nil {
panic(err)
}
fmt.Printf("%#v\n", it)
}
}
Edit 6: It appears that field C is a Qt::Key.
Last edited by geek1011; 06-17-2021 at 01:07 PM.
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