I can't find any information regarding CSR True Wireless Stereo v3. What's that? Can you share documentation where you got information about these IDs? On 19.12.2018 20:59, Pali Rohár wrote: > On Thursday 09 August 2018 16:39:09 ValdikSS wrote: >> 0xFF 0x000A 0x0103 — Unknown codec found on Bose QuietComfort QC35 II > "The CSR True Wireless Stereo v3 Codec ID for SBC." > >> Value hex dump: 07 06 00 00 ff ff 02 35 > From information which I have, info payload is just embedded AVDTP media > capability buffer. > > 07 - AVDTP_SERVICE_MEDIA_CODEC > 06 - length > > 00 - AVDTP_MEDIA_TYPE_AUDIO > > 00 - A2DP_CODEC_SBC > ff - SBC_CHANNEL_MODE_JOINT_STEREO | SBC_CHANNEL_MODE_STEREO | > SBC_CHANNEL_MODE_DUAL_CHANNEL | SBC_CHANNEL_MODE_MONO | > SBC_SAMPLING_FREQ_48000 | SBC_SAMPLING_FREQ_44100 | > SBC_SAMPLING_FREQ_32000 | SBC_SAMPLING_FREQ_16000 > ff - SBC_BLOCK_LENGTH_4 | SBC_BLOCK_LENGTH_8 | > SBC_BLOCK_LENGTH_12 | SBC_BLOCK_LENGTH_16 | > SBC_SUBBANDS_4 | SBC_SUBBANDS_8 > SBC_ALLOCATION_SNR | SBC_ALLOCATION_LOUDNESS > 02 - min bitpool > 35 - max bitpool > > So it matches SBC definition buffer as expected. > >> 0xFF 0x000A 0x0104 — Unknown codec found on Bose QuietComfort QC35 II > "The CSR True Wireless Stereo v3 Codec ID for AAC." > >> Value hex dump: 07 08 00 02 c0 ff 8c 84 e2 00 > Again, it should be embedded AVDTP media capability buffer. > > 07 - AVDTP_SERVICE_MEDIA_CODEC > 08 - length > > 00 - AVDTP_MEDIA_TYPE_AUDIO > > 02 - A2DP_CODEC_MPEG24 > c0 - AAC_OBJECT_TYPE_MPEG2_AAC_LC | AAC_OBJECT_TYPE_MPEG4_AAC_LTP | > AAC_OBJECT_TYPE_MPEG4_AAC_SCA > ff 8c - frequences: all; channels: all > 84 e2 00 - VBR; bitrate: 320000 > > So also MPEG2/4 AAC buffer is correct. > > > Moreover there also exist these codecs: > > 0xFF 0x000A 0x0105 - The CSR True Wireless Stereo v3 Codec ID for MP3. > 0xFF 0x000A 0x0106 - The CSR True Wireless Stereo v3 Codec ID for AptX. > > And again capability buffer should contain embedded AVDTP media > capability buffer for MPEG1 (with Layyer 3) and for aptX. >
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