68 lines
3.4 KiB
C
68 lines
3.4 KiB
C
/* Routines for translation ("t9n") between SDP codec names and CC/BSSMAP codec constants */
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#pragma once
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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#include <osmocom/gsm/protocol/gsm_08_08.h>
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#include <osmocom/mgcp_client/mgcp_client.h>
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#include <osmocom/msc/sdp_msg.h>
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#include <osmocom/gsm/mncc.h>
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#define NO_MGCP_CODEC 0xffffffff
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extern const struct gsm_mncc_bearer_cap bearer_cap_empty;
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enum codec_frhr {
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CODEC_FRHR_NONE = 0,
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CODEC_FRHR_FR,
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CODEC_FRHR_HR,
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};
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struct codec_mapping {
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/* The sdp.payload_type number in a mapping is not necessarily imperative, but may just reflect the usual
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* payload type number for a given codec. */
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struct sdp_audio_codec sdp;
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/* The id that mgcp_client.h uses for this codec. Must be set in each mapping, because 0 means PCMU. */
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enum mgcp_codecs mgcp;
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/* Nr of used entries in speech_ver[] below. */
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unsigned int speech_ver_count;
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/* Entries to add to Speech Version lists when this codec is present, if any. */
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enum gsm48_bcap_speech_ver speech_ver[8];
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/* If applicable, one of GSM_TCHF_FRAME, GSM_TCHF_FRAME_EFR, GSM_TCHH_FRAME, GSM_TCH_FRAME_AMR; or zero. */
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uint32_t mncc_payload_msg_type;
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/* Set to true if gsm0808_speech_codec below reflects a meaningful value. */
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bool has_gsm0808_speech_codec;
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struct gsm0808_speech_codec gsm0808_speech_codec;
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/* If applicable, entries to add to Permitted Speech lists when this codec is present; or zero. */
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enum gsm0808_permitted_speech perm_speech;
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/* If applicable, indicator whether this codec can work on a GERAN half-rate lchan, or whether full-rate is
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* required. Leave zero when this codec does not apply to GERAN. */
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enum codec_frhr frhr;
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};
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extern const struct codec_mapping codec_map[];
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#define foreach_codec_mapping(CODEC_MAPPING) \
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for ((CODEC_MAPPING) = codec_map; (CODEC_MAPPING) < codec_map + ARRAY_SIZE(codec_map); (CODEC_MAPPING)++)
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const struct codec_mapping *codec_mapping_by_speech_ver(enum gsm48_bcap_speech_ver speech_ver);
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const struct codec_mapping *codec_mapping_by_gsm0808_speech_codec_type(enum gsm0808_speech_codec_type sct,
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uint16_t cfg);
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const struct codec_mapping *codec_mapping_by_perm_speech(enum gsm0808_permitted_speech perm_speech);
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const struct codec_mapping *codec_mapping_by_subtype_name(const char *subtype_name);
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const struct codec_mapping *codec_mapping_by_mgcp_codec(enum mgcp_codecs mgcp);
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int bearer_cap_add_speech_ver(struct gsm_mncc_bearer_cap *bearer_cap, enum gsm48_bcap_speech_ver speech_ver);
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int sdp_audio_codec_add_to_bearer_cap(struct gsm_mncc_bearer_cap *bearer_cap, const struct sdp_audio_codec *codec);
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int sdp_audio_codecs_to_bearer_cap(struct gsm_mncc_bearer_cap *bearer_cap, const struct sdp_audio_codecs *ac);
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int bearer_cap_set_radio(struct gsm_mncc_bearer_cap *bearer_cap);
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struct sdp_audio_codec *sdp_audio_codecs_add_speech_ver(struct sdp_audio_codecs *ac,
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enum gsm48_bcap_speech_ver speech_ver);
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struct sdp_audio_codec *sdp_audio_codecs_add_mgcp_codec(struct sdp_audio_codecs *ac, enum mgcp_codecs mgcp_codec);
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void sdp_audio_codecs_from_bearer_cap(struct sdp_audio_codecs *ac, const struct gsm_mncc_bearer_cap *bc);
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void sdp_audio_codecs_from_speech_codec_list(struct sdp_audio_codecs *ac, const struct gsm0808_speech_codec_list *cl);
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int sdp_audio_codecs_to_gsm0808_channel_type(struct gsm0808_channel_type *ct, const struct sdp_audio_codecs *ac);
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enum mgcp_codecs sdp_audio_codec_to_mgcp_codec(const struct sdp_audio_codec *codec);
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