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81 lines
1.9 KiB
81 lines
1.9 KiB
#ifndef _RTPLIB_H_
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#define _RTPLIB_H_
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#include <stdint.h>
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#include "str.h"
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struct codec_def_s;
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typedef struct codec_def_s codec_def_t;
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struct rtp_header {
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unsigned char v_p_x_cc;
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unsigned char m_pt;
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uint16_t seq_num;
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uint32_t timestamp;
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uint32_t ssrc;
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uint32_t csrc[];
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} __attribute__ ((packed));
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union codec_format_options {
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struct {
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int interleaving;
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unsigned int mode_set; // bitfield
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int mode_change_period;
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unsigned int octet_aligned:1;
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unsigned int crc:1;
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unsigned int robust_sorting:1;
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unsigned int mode_change_neighbor:1;
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} amr;
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struct {
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int mode;
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} ilbc;
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};
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struct rtp_codec_format {
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union codec_format_options parsed;
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unsigned int fmtp_parsed:1; // set if fmtp string was successfully parsed
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};
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struct rtp_payload_type {
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int payload_type;
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str encoding_with_params; // "opus/48000/2"
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str encoding_with_full_params; // "opus/48000/1"
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str encoding; // "opus"
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unsigned int clock_rate; // 48000
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str encoding_parameters; // "2"
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int channels; // 2
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str format_parameters; // value of a=fmtp
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str codec_opts; // extra codec-specific options
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GQueue rtcp_fb; // a=rtcp-fb:...
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int ptime; // default from RFC
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int bitrate;
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const codec_def_t *codec_def;
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GList *prefs_link; // link in `codec_prefs` list
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struct rtp_codec_format format; // parsed out fmtp
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unsigned int for_transcoding:1;
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unsigned int accepted:1;
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};
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extern const struct rtp_payload_type rfc_rtp_payload_types[];
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extern const int num_rfc_rtp_payload_types;
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int rtp_payload(struct rtp_header **out, str *p, const str *s);
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int rtp_padding(const struct rtp_header *header, str *payload);
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const struct rtp_payload_type *rtp_get_rfc_payload_type(unsigned int type);
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const struct rtp_payload_type *rtp_get_rfc_codec(const str *codec);
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int rtp_payload_type_cmp(const struct rtp_payload_type *, const struct rtp_payload_type *);
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int rtp_payload_type_cmp_nf(const struct rtp_payload_type *, const struct rtp_payload_type *);
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#endif
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