| /* Routines for translation between codec representations: SDP, CC/BSSMAP variants, MGCP, MNCC */ |
| #pragma once |
| |
| #include <osmocom/gsm/protocol/gsm_04_08.h> |
| #include <osmocom/gsm/protocol/gsm_08_08.h> |
| #include <osmocom/mgcp_client/mgcp_client.h> |
| #include <osmocom/msc/sdp_msg.h> |
| #include <osmocom/gsm/mncc.h> |
| |
| #define NO_MGCP_CODEC 0xffffffff |
| |
| extern const struct gsm_mncc_bearer_cap bearer_cap_empty; |
| |
| enum codec_frhr { |
| CODEC_FRHR_NONE = 0, |
| CODEC_FRHR_FR, |
| CODEC_FRHR_HR, |
| }; |
| |
| struct codec_mapping { |
| /* The sdp.payload_type number in a mapping is not necessarily imperative, but may just reflect the usual |
| * payload type number for a given codec. */ |
| struct sdp_audio_codec sdp; |
| /* The id that mgcp_client.h uses for this codec. Must be set in each mapping, because 0 means PCMU. */ |
| enum mgcp_codecs mgcp; |
| /* Nr of used entries in speech_ver[] below. */ |
| unsigned int speech_ver_count; |
| /* Entries to add to Speech Version lists when this codec is present, if any. */ |
| enum gsm48_bcap_speech_ver speech_ver[8]; |
| /* If applicable, one of GSM_TCHF_FRAME, GSM_TCHF_FRAME_EFR, GSM_TCHH_FRAME, GSM_TCH_FRAME_AMR; or zero. */ |
| uint32_t mncc_payload_msg_type; |
| /* Set to true if gsm0808_speech_codec below reflects a meaningful value. */ |
| bool has_gsm0808_speech_codec; |
| struct gsm0808_speech_codec gsm0808_speech_codec; |
| /* If applicable, entries to add to Permitted Speech lists when this codec is present; or zero. */ |
| enum gsm0808_permitted_speech perm_speech; |
| /* If applicable, indicator whether this codec can work on a GERAN half-rate lchan, or whether full-rate is |
| * required. Leave zero when this codec does not apply to GERAN. */ |
| enum codec_frhr frhr; |
| }; |
| |
| const struct codec_mapping *codec_mapping_by_speech_ver(enum gsm48_bcap_speech_ver speech_ver); |
| const struct codec_mapping *codec_mapping_by_gsm0808_speech_codec_type(enum gsm0808_speech_codec_type sct); |
| const struct codec_mapping *codec_mapping_by_gsm0808_speech_codec(const struct gsm0808_speech_codec *sc); |
| const struct codec_mapping *codec_mapping_by_perm_speech(enum gsm0808_permitted_speech perm_speech); |
| const struct codec_mapping *codec_mapping_by_subtype_name(const char *subtype_name); |
| const struct codec_mapping *codec_mapping_by_mgcp_codec(enum mgcp_codecs mgcp); |
| |
| int bearer_cap_add_speech_ver(struct gsm_mncc_bearer_cap *bearer_cap, enum gsm48_bcap_speech_ver speech_ver); |
| int bearer_cap_filter_rev_lev(struct gsm_mncc_bearer_cap *bearer_cap, uint8_t rev_lev); |
| int sdp_audio_codec_add_to_bearer_cap(struct gsm_mncc_bearer_cap *bearer_cap, const struct sdp_audio_codec *codec); |
| int sdp_audio_codecs_to_bearer_cap(struct gsm_mncc_bearer_cap *bearer_cap, const struct sdp_audio_codecs *ac); |
| int bearer_cap_set_radio(struct gsm_mncc_bearer_cap *bearer_cap); |
| |
| struct sdp_audio_codec *sdp_audio_codecs_add_speech_ver(struct sdp_audio_codecs *ac, |
| enum gsm48_bcap_speech_ver speech_ver); |
| struct sdp_audio_codec *sdp_audio_codecs_add_mgcp_codec(struct sdp_audio_codecs *ac, enum mgcp_codecs mgcp_codec); |
| void sdp_audio_codecs_from_bearer_cap(struct sdp_audio_codecs *ac, const struct gsm_mncc_bearer_cap *bc); |
| |
| int sdp_audio_codec_to_speech_codec_list(struct gsm0808_speech_codec_list *scl, const struct sdp_audio_codec *codec); |
| void sdp_audio_codecs_to_speech_codec_list(struct gsm0808_speech_codec_list *cl, const struct sdp_audio_codecs *ac); |
| void sdp_audio_codecs_from_speech_codec_list(struct sdp_audio_codecs *ac, const struct gsm0808_speech_codec_list *cl); |
| |
| int sdp_audio_codecs_to_gsm0808_channel_type(struct gsm0808_channel_type *ct, const struct sdp_audio_codecs *ac); |
| |
| enum mgcp_codecs sdp_audio_codec_to_mgcp_codec(const struct sdp_audio_codec *codec); |