gsm_08_58: Document IPAC RTP CSD modes in at least a few words
Let's clarify what those modes mean
Change-Id: I77fc7b24ccd387f54a7c7edad666737252af6bd9
diff --git a/include/osmocom/gsm/protocol/gsm_08_58.h b/include/osmocom/gsm/protocol/gsm_08_58.h
index 67b76f8..e932ff8 100644
--- a/include/osmocom/gsm/protocol/gsm_08_58.h
+++ b/include/osmocom/gsm/protocol/gsm_08_58.h
@@ -744,10 +744,10 @@
/* RSL_IE_IPAC_RTP_CSD_FMT, lower four bits */
enum rsl_ipac_rtp_csd_format_d {
- RSL_IPAC_RTP_CSD_EXT_TRAU = 0,
- RSL_IPAC_RTP_CSD_NON_TRAU = 1,
- RSL_IPAC_RTP_CSD_TRAU_BTS = 2,
- RSL_IPAC_RTP_CSD_IWF_FREE = 3,
+ RSL_IPAC_RTP_CSD_EXT_TRAU = 0, /*!< TRAU-like RTP format, without leading zero-bits */
+ RSL_IPAC_RTP_CSD_NON_TRAU = 1, /*!< packed 16k (252/288 bit) / 8k (126 bit) in RTP */
+ RSL_IPAC_RTP_CSD_TRAU_BTS = 2, /*!< TRAU in BTS; V.110 in RTP/CLEARMODE */
+ RSL_IPAC_RTP_CSD_IWF_FREE = 3, /*!< unknown proprietary IWF-free BTS-BTS data */
};
/* RSL_IE_IPAC_RTP_CSD_FMT, upper four bits */
enum rsl_ipac_rtp_csd_format_ir {