VoLTE Codec support » History » Version 1
Hoernchen, 05/24/2024 07:14 PM
1 | 1 | Hoernchen | h1. VoLTE Codec support |
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3 | Adding/changing the supported codecs is fairly straightforward as lon as 1) the phone is rooted/unlocked (magisk, ...) 2) the phone uses a qc modem. |
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4 | Steps to reproduce for a Pixel 4 5G (bramble) running Graphene os/Android 14: |
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6 | |||
7 | (see https://band.radio/diag) |
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8 | <pre> |
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9 | > adb shell "su -c 'resetprop ro.bootmode usbradio && resetprop ro.build.type userdebug && setprop sys.usb.config diag,diag_mdm,adb'" |
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10 | โฏ adb shell "su -c getprop | grep -e ro.bootmode -e ro.build.type -e sys.usb.config" |
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11 | [persist.sys.usb.config]: [adb] |
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12 | [ro.bootmode]: [usbradio] |
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13 | [ro.build.type]: [userdebug] |
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14 | [sys.usb.config]: [diag,diag_mdm,adb] |
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15 | [sys.usb.configfs]: [2] |
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16 | |||
17 | </pre> |
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18 | Now change the USB mode on the phone (physically, by touching it) from charging to something else like file trasnfer, or tethering, to apply the new sub config |
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21 | This changes the usb vid/pid, make sure your access permissionss (udev) still work |
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22 | <pre> |
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23 | โฏ lsusb |
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24 | Bus 001 Device 003: ID 18d1:4ee7 Google Inc. Nexus/Pixel Device (charging + debug) |
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25 | </pre> |
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26 | |||
27 | afterwards |
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28 | <pre> |
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29 | โฏ lsusb |
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30 | Bus 001 Device 004: ID 05c6:902d Qualcomm, Inc. Pixel 4a (5G) |
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31 | </pre> |
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32 | |||
33 | |||
34 | install "qcsuper":https://github.com/P1sec/QCSuper, it should "just work" to pull the overideconfig file |
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35 | |||
36 | |||
37 | <pre> |
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38 | work2/work via ๐ v3.12.3 (.venv) |
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39 | โฏ qcsuper --efs-shell --adb |
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40 | >>> get efsprofiles/overideconfig |
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41 | >>> exit |
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42 | </pre> |
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43 | |||
44 | Add your codec config as below, AMR is already defined somewhere else, so this just adds EVS |
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45 | |||
46 | <pre> |
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47 | |||
48 | [QIPCALL:ImsVoiceConfig] |
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49 | |||
50 | #This config is required to enable Call end on RTP inactivity. |
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51 | |||
52 | *CallEndonRTPInactivity = 1 |
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53 | |||
54 | #This config is required to enable propagating the incoming CANCEL message's reason to UI |
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55 | |||
56 | *propagateIncomingCancelReason = 0 |
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57 | |||
58 | |||
59 | [QIPCALL:ImsVoiceSuppsConfig] |
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60 | |||
61 | #This config is required to enable presentation of the call to |
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62 | #the user when UE is already in two calls (active and held). |
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63 | |||
64 | *presentThirdCalltoUser = 1 |
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65 | |||
66 | |||
67 | [Ut:UtConfiguration] |
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68 | |||
69 | #This config item specifies the error codes for which current SS request is attempted on CS but Ut is not permanently blocked |
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70 | |||
71 | *performCSFBOnError = "404,408,range:500-600" |
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72 | |||
73 | |||
74 | [QIPCALL:ImsVoWifiConfig] |
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75 | |||
76 | *EnableOnDemandDPDCheckOnWiFiMidCallInactivityTimeOut = 1 |
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77 | |||
78 | ############################ |
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79 | ############################ |
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80 | # new/added config below |
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81 | |||
82 | |||
83 | # nb โ 8 kHz, wb โ 16 kHz, swb โ 32 kHz, fb โ 48 kHz. |
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84 | # |
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85 | #Possible INTEGER values for Bandwidth are as follows: |
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86 | #0 --> BandWidth_NB |
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87 | #1 --> BandWidth_WB |
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88 | #2 --> BandWidth_SWB |
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89 | #3 --> BandWidth_FB |
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90 | #4 --> BandWidth_NB_WB # range from-to |
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91 | #5 --> BandWidth_NB_SWB # range from-to |
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92 | #6 --> BandWidth_NB_FWB # range from-to |
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93 | #7 --> BandWidth_MAX |
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94 | |||
95 | # bitrate bit pattern in DECIMAL: 5.9, 7.2, 8, 9.6, 13.2, 16.4, 24.4, 32, 48, 64, 96, 128 |
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96 | # 4095 = 0b111111111111 = all bandwidths. |
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97 | # NO GAPS BETWEEN BITRATES! only consecutive! |
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98 | |||
99 | # make sure to check allowed bw+br config, i.e. evs 5.9 = only nv+wb |
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100 | |||
101 | [QIPCALL:EVS_0] |
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102 | *Bandwidth = 4 |
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103 | *BitRate = 1 |
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104 | # compact format, rtp full header = 1 |
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105 | *hf_only = 1 |
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107 | ## _xx suffix = RTP PT number, arbitrary not less than 96 |
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108 | [QIPCALL:ImsMediaProfileConfig] |
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109 | *AudioProfile1 = "EVS_0_126;AMR_0_104;AMR_1_102" |
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110 | |||
111 | |||
112 | </pre> |
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113 | |||
114 | put the file back/overwrite: |
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115 | |||
116 | <pre> |
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117 | work2/work via ๐ v3.12.3 (.venv) |
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118 | โฏ qcsuper --efs-shell --adb |
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119 | >>> put overideconfig efsprofiles |
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120 | >>> ls efsprofiles |
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121 | +--------------------------------------------------------------------------------------------------------------------------------+ |
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122 | + File type | Special flags | File rights | File name | File size | Modification | Creation + |
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123 | +--------------------------------------------------------------------------------------------------------------------------------+ |
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124 | + Regular file (S_IFREG) | | rwxrwxrwx | 'overideconfig' | 1631 | 2024-05-21 11:36:37 | 2024-05-21 11:36:37 + |
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125 | +--------------------------------------------------------------------------------------------------------------------------------+ |
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126 | </pre> |
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127 | |||
128 | reboot the phone, done. |
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129 | Check SDP + rtmp stream for the id/negotiated codec. |