| /* Minimalistic SDP parse/compose API, focused on GSM audio codecs */ |
| #pragma once |
| |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/sockaddr_str.h> |
| |
| extern const struct value_string sdp_msg_payload_type_names[]; |
| static inline const char *sdp_msg_payload_type_name(unsigned int payload_type) |
| { return get_value_string(sdp_msg_payload_type_names, payload_type); } |
| int sdp_subtype_name_to_payload_type(const char *subtype_name); |
| |
| enum sdp_mode_e { |
| SDP_MODE_UNSET = 0, |
| SDP_MODE_SENDONLY = 1, |
| SDP_MODE_RECVONLY = 2, |
| SDP_MODE_SENDRECV = 3, |
| SDP_MODE_INACTIVE = 4, |
| }; |
| |
| struct sdp_audio_codec { |
| /* Payload type number, like 3 for GSM-FR. */ |
| unsigned int payload_type; |
| /* Like "GSM", "AMR", "EFR", ... */ |
| char subtype_name[16]; |
| unsigned int rate; |
| char fmtp[64]; |
| }; |
| |
| struct sdp_audio_codecs { |
| unsigned int count; |
| struct sdp_audio_codec codec[16]; |
| }; |
| |
| struct sdp_msg { |
| struct osmo_sockaddr_str rtp; |
| unsigned int ptime; |
| enum sdp_mode_e mode; |
| struct sdp_audio_codecs audio_codecs; |
| }; |
| |
| #define foreach_sdp_audio_codec(/* struct sdp_audio_codec* */ CODEC, \ |
| /* struct sdp_audio_codecs* */ AC) \ |
| for (CODEC = (AC)->codec; \ |
| (CODEC - (AC)->codec) < OSMO_MIN((AC)->count, ARRAY_SIZE((AC)->codec)); \ |
| CODEC++) |
| |
| const char *sdp_msg_line_end(const char *src); |
| |
| bool sdp_audio_codec_is_set(const struct sdp_audio_codec *a); |
| int sdp_audio_codec_cmp(const struct sdp_audio_codec *a, const struct sdp_audio_codec *b, |
| bool cmp_fmtp, bool cmp_payload_type); |
| int sdp_audio_codecs_cmp(const struct sdp_audio_codecs *a, const struct sdp_audio_codecs *b, |
| bool cmp_fmtp, bool cmp_payload_type); |
| |
| struct sdp_audio_codec *sdp_audio_codecs_add(struct sdp_audio_codecs *ac, unsigned int payload_type, |
| const char *subtype_name, unsigned int rate, const char *fmtp); |
| struct sdp_audio_codec *sdp_audio_codecs_add_copy(struct sdp_audio_codecs *ac, |
| const struct sdp_audio_codec *codec); |
| int sdp_audio_codecs_remove(struct sdp_audio_codecs *ac, const struct sdp_audio_codec *codec); |
| struct sdp_audio_codec *sdp_audio_codecs_by_payload_type(struct sdp_audio_codecs *ac, |
| unsigned int payload_type, bool create); |
| struct sdp_audio_codec *sdp_audio_codecs_by_descr(struct sdp_audio_codecs *ac, |
| const struct sdp_audio_codec *codec); |
| |
| void sdp_audio_codecs_intersection(struct sdp_audio_codecs *ac_dest, const struct sdp_audio_codecs *ac_other, |
| bool translate_payload_type_numbers); |
| void sdp_audio_codecs_select(struct sdp_audio_codecs *ac, struct sdp_audio_codec *codec); |
| |
| int sdp_msg_to_sdp_str_buf(char *dst, size_t dst_size, const struct sdp_msg *sdp); |
| int sdp_msg_from_sdp_str(struct sdp_msg *sdp, const char *src); |
| |
| int sdp_audio_codec_to_str_buf(char *buf, size_t buflen, const struct sdp_audio_codec *codec); |
| char *sdp_audio_codec_to_str_c(void *ctx, const struct sdp_audio_codec *codec); |
| const char *sdp_audio_codec_to_str(const struct sdp_audio_codec *codec); |
| |
| int sdp_audio_codecs_to_str_buf(char *buf, size_t buflen, const struct sdp_audio_codecs *ac); |
| char *sdp_audio_codecs_to_str_c(void *ctx, const struct sdp_audio_codecs *ac); |
| const char *sdp_audio_codecs_to_str(const struct sdp_audio_codecs *ac); |
| |
| int sdp_msg_to_str_buf(char *buf, size_t buflen, const struct sdp_msg *sdp); |
| char *sdp_msg_to_str_c(void *ctx, const struct sdp_msg *sdp); |
| const char *sdp_msg_to_str(const struct sdp_msg *sdp); |