43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#pragma once
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gsm/mncc.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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struct gsm0808_speech_codec_list;
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struct cc_sdp {
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/* The fixed set of codecs available on the RAN type, per definition. */
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struct sdp_audio_codecs ran;
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/* The codecs advertised by the MS Bearer Capabilities */
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struct sdp_audio_codecs ms;
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/* If known, the set of codecs the current RAN cell allows / has available.
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* This may not be available if the BSC does not issue this information early enough.
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* Should be ignored if empty. */
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struct sdp_audio_codecs cell;
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/* SDP as last received from the remote call leg. */
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struct sdp_msg remote;
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/* After a channel was assigned, this reflects the chosen codec. */
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struct sdp_audio_codec assignment;
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/* Resulting choice of supported codecs, usually the intersection of the above,
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* and the local RTP address to be sent to the remote call leg. */
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struct sdp_msg result;
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};
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void cc_sdp_init(struct cc_sdp *cc_sdp,
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enum osmo_rat_type ran_type,
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const struct gsm_mncc_bearer_cap *ms_bearer_cap,
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const struct gsm0808_speech_codec_list *codec_list_bss_supported);
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void cc_sdp_set_cell(struct cc_sdp *cc_sdp,
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const struct gsm0808_speech_codec_list *codec_list_bss_supported);
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int cc_sdp_filter(struct cc_sdp *cc_sdp);
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int cc_sdp_name_buf(char *buf, size_t buflen, const struct cc_sdp *cc_sdp);
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char *cc_sdp_name_c(void *ctx, const struct cc_sdp *cc_sdp);
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const char *cc_sdp_name(const struct cc_sdp *cc_sdp);
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