path: root/third_party/sipcc/sipcc_sdp.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _SIPCC_SDP_H_
#define _SIPCC_SDP_H_

#include "sdp_os_defs.h"
#include "ccsdp.h"

/* SDP Defines */

/* The following defines are used to indicate params that are specified
 * as the choose parameter or parameters that are invalid.  These can
 * be used where the value required is really a uint16_t, but is represented
 * by an int32_t.
 */
#define SDP_CHOOSE_PARAM           (-1)
#define SDP_SESSION_LEVEL        0xFFFF

#define UNKNOWN_CRYPTO_SUITE              "UNKNOWN_CRYPTO_SUITE"
#define AES_CM_128_HMAC_SHA1_32           "AES_CM_128_HMAC_SHA1_32"
#define AES_CM_128_HMAC_SHA1_80           "AES_CM_128_HMAC_SHA1_80"
#define F8_128_HMAC_SHA1_80               "F8_128_HMAC_SHA1_80"

/* Pulled in from rtp_defs.h. */
#define GET_DYN_PAYLOAD_TYPE_VALUE(a) ((a & 0XFF00) ? ((a & 0XFF00) >> 8) : a)
#define SET_PAYLOAD_TYPE_WITH_DYNAMIC(a,b) ((a << 8) | b)

/*
 * SDP_SRTP_MAX_KEY_SIZE_BYTES
 *  Maximum size for a SRTP Master Key in bytes.
 */
#define SDP_SRTP_MAX_KEY_SIZE_BYTES  16
/*
 * SDP_SRTP_MAX_SALT_SIZE_BYTES
 *  Maximum size for a SRTP Master Salt in bytes.
 */
#define SDP_SRTP_MAX_SALT_SIZE_BYTES 14
/*
 * SDP_SRTP_MAX_MKI_SIZE_BYTES
 *  Maximum size for a SRTP Master Key Index in bytes.
 */
#define SDP_SRTP_MAX_MKI_SIZE_BYTES   4

/* Max number of characters for Lifetime */
#define SDP_SRTP_MAX_LIFETIME_BYTES 16

#define SDP_SDESCRIPTIONS_KEY_SIZE_UNKNOWN      0
#define SDP_SRTP_CRYPTO_SELECTION_FLAGS_UNKNOWN 0

/* Max number of fmtp redundant encodings */
#define SDP_FMTP_MAX_REDUNDANT_ENCODINGS 128

/*
 * SRTP_CONTEXT_SET_*
 *  Set a SRTP Context field flag
 */
#define SDP_SRTP_ENCRYPT_MASK           0x00000001
#define SDP_SRTP_AUTHENTICATE_MASK      0x00000002
#define SDP_SRTCP_ENCRYPT_MASK          0x00000004
#define SDP_SRTCP_SSRC_MASK             0x20000000
#define SDP_SRTCP_ROC_MASK              0x10000000
#define SDP_SRTCP_KDR_MASK              0x08000000
#define SDP_SRTCP_KEY_MASK              0x80000000
#define SDP_SRTCP_SALT_MASK             0x40000000

#define SDP_SRTP_CONTEXT_SET_SSRC(cw)          ((cw) |= SDP_SRTCP_SSRC_MASK)
#define SDP_SRTP_CONTEXT_SET_ROC(cw)           ((cw) |= SDP_SRTCP_ROC_MASK)
#define SDP_SRTP_CONTEXT_SET_KDR(cw)           ((cw) |= SDP_SRTCP_KDR_MASK)
#define SDP_SRTP_CONTEXT_SET_MASTER_KEY(cw)    ((cw) |= SDP_SRTCP_KEY_MASK)
#define SDP_SRTP_CONTEXT_SET_MASTER_SALT(cw)   ((cw) |= SDP_SRTCP_SALT_MASK)
#define SDP_SRTP_CONTEXT_SET_ENCRYPT_AUTHENTICATE(cw) \
     ((cw) |= (SDP_SRTP_ENCRYPT_MASK | SDP_SRTP_AUTHENTICATE_MASK | \
               SDP_SRTCP_ENCRYPT_MASK))
#define SDP_SRTP_CONTEXT_RESET_SSRC(cw)     ((cw) &= ~(SDP_SRTCP_SSRC_MASK))
#define SDP_SRTP_CONTEXT_RESET_ROC(cw)      ((cw) &= ~(SDP_SRTCP_ROC_MASK))
#define SDP_SRTP_CONTEXT_RESET_KDR(cw)      ((cw) &= ~(SDP_SRTCP_KDR_MASK))
#define SDP_CONTEXT_RESET_MASTER_KEY(cw)    ((cw) &= ~(SDP_SRTCP_KEY_MASK))
#define SDP_CONTEXT_RESET_MASTER_SALT(cw)   ((cw) &= ~(SDP_SRTCP_SALT_MASK))
#define SDP_EXTMAP_AUDIO_LEVEL "urn:ietf:params:rtp-hdrext:ssrc-audio-level"

/* SDP Enum Types */
typedef enum {
    SDP_DEBUG_TRACE,
    SDP_DEBUG_WARNINGS,
    SDP_DEBUG_ERRORS,
    SDP_MAX_DEBUG_TYPES
} sdp_debug_e;

typedef enum {
    SDP_CHOOSE_CONN_ADDR,
    SDP_CHOOSE_PORTNUM,
    SDP_MAX_CHOOSE_PARAMS
} sdp_choose_param_e;


/* Token Lines - these must be in the same order they should
 *               appear in an SDP.
 */
typedef enum {
    SDP_TOKEN_V = 0,
    SDP_TOKEN_O,
    SDP_TOKEN_S,
    SDP_TOKEN_I,
    SDP_TOKEN_U,
    SDP_TOKEN_E,
    SDP_TOKEN_P,
    SDP_TOKEN_C,
    SDP_TOKEN_B,
    SDP_TOKEN_T,
    SDP_TOKEN_R,
    SDP_TOKEN_Z,
    SDP_TOKEN_K,
    SDP_TOKEN_A,
    SDP_TOKEN_M,
    SDP_MAX_TOKENS
} sdp_token_e;

/* Media Types */
typedef enum {
    SDP_MEDIA_AUDIO = 0,
    SDP_MEDIA_VIDEO,
    SDP_MEDIA_APPLICATION,
    SDP_MEDIA_DATA,
    SDP_MEDIA_CONTROL,
    SDP_MEDIA_NAS_RADIUS,
    SDP_MEDIA_NAS_TACACS,
    SDP_MEDIA_NAS_DIAMETER,
    SDP_MEDIA_NAS_L2TP,
    SDP_MEDIA_NAS_LOGIN,
    SDP_MEDIA_NAS_NONE,
    SDP_MEDIA_TEXT,
    SDP_MEDIA_IMAGE,
    SDP_MAX_MEDIA_TYPES,
    SDP_MEDIA_UNSUPPORTED,
    SDP_MEDIA_INVALID
} sdp_media_e;


/* Connection Network Type */
typedef enum {
    SDP_NT_INTERNET = 0,              /*  0 -> IP - In SDP "IN" is defined */
                                      /*       to mean "Internet"          */
    SDP_NT_ATM,                               /*  1 -> ATM                         */
    SDP_NT_FR,                        /*  2 -> FRAME RELAY                 */
    SDP_NT_LOCAL,                     /*  3 -> local                       */
    SDP_MAX_NETWORK_TYPES,
    SDP_NT_UNSUPPORTED,
    SDP_NT_INVALID
} sdp_nettype_e;


/* Address Type  */
typedef enum {
    SDP_AT_IP4 = 0,                   /* 0 -> IP Version 4 (IP4)           */
    SDP_AT_IP6,                       /* 1 -> IP Version 6 (IP6)           */
    SDP_AT_NSAP,                      /* 2 -> 20 byte NSAP address         */
    SDP_AT_EPN,                       /* 3 -> 32 bytes of endpoint name    */
    SDP_AT_E164,                      /* 4 -> 15 digit decimal number addr */
    SDP_AT_GWID,                      /* 5 -> Private gw id. ASCII string  */
    SDP_MAX_ADDR_TYPES,
    SDP_AT_UNSUPPORTED,
    SDP_AT_FQDN,
    SDP_AT_INVALID
} sdp_addrtype_e;


/* Transport Types */

#define SDP_MAX_PROFILES 3

typedef enum {
    SDP_TRANSPORT_RTPAVP = 0,
    SDP_TRANSPORT_UDP,
    SDP_TRANSPORT_UDPTL,
    SDP_TRANSPORT_CES10,
    SDP_TRANSPORT_LOCAL,
    SDP_TRANSPORT_AAL2_ITU,
    SDP_TRANSPORT_AAL2_ATMF,
    SDP_TRANSPORT_AAL2_CUSTOM,
    SDP_TRANSPORT_AAL1AVP,
    SDP_TRANSPORT_UDPSPRT,
    SDP_TRANSPORT_RTPSAVP,
    SDP_TRANSPORT_TCP,
    SDP_TRANSPORT_RTPSAVPF,
    SDP_TRANSPORT_DTLSSCTP,
    SDP_TRANSPORT_RTPAVPF,
    SDP_TRANSPORT_UDPTLSRTPSAVP,
    SDP_TRANSPORT_UDPTLSRTPSAVPF,
    SDP_TRANSPORT_TCPDTLSRTPSAVP,
    SDP_TRANSPORT_TCPDTLSRTPSAVPF,
    SDP_TRANSPORT_UDPDTLSSCTP,
    SDP_TRANSPORT_TCPDTLSSCTP,
    SDP_MAX_TRANSPORT_TYPES,
    SDP_TRANSPORT_UNSUPPORTED,
    SDP_TRANSPORT_INVALID
} sdp_transport_e;


/* Encryption KeyType */
typedef enum {
    SDP_ENCRYPT_CLEAR,                /* 0 -> Key given in the clear       */
    SDP_ENCRYPT_BASE64,               /* 1 -> Base64 encoded key           */
    SDP_ENCRYPT_URI,                  /* 2 -> Ptr to URI                   */
    SDP_ENCRYPT_PROMPT,               /* 3 -> No key included, prompt user */
    SDP_MAX_ENCRYPT_TYPES,
    SDP_ENCRYPT_UNSUPPORTED,
    SDP_ENCRYPT_INVALID
} sdp_encrypt_type_e;


/* Known string payload types */
typedef enum {
    SDP_PAYLOAD_T38,
    SDP_PAYLOAD_XTMR,
    SDP_PAYLOAD_T120,
    SDP_MAX_STRING_PAYLOAD_TYPES,
    SDP_PAYLOAD_UNSUPPORTED,
    SDP_PAYLOAD_INVALID
} sdp_payload_e;


/* Payload type indicator */
typedef enum {
    SDP_PAYLOAD_NUMERIC,
    SDP_PAYLOAD_ENUM
} sdp_payload_ind_e;


/* Image payload types */
typedef enum {
    SDP_PORT_NUM_ONLY,                  /* <port> or '$'                */
    SDP_PORT_NUM_COUNT,                 /* <port>/<number of ports>     */
    SDP_PORT_VPI_VCI,                   /* <vpi>/<vci>                  */
    SDP_PORT_VCCI,                      /* <vcci>                       */
    SDP_PORT_NUM_VPI_VCI,               /* <port>/<vpi>/<vci>           */
    SDP_PORT_VCCI_CID,                  /* <vcci>/<cid> or '$'/'$'      */
    SDP_PORT_NUM_VPI_VCI_CID,           /* <port>/<vpi>/<vci>/<cid>     */
    SDP_MAX_PORT_FORMAT_TYPES,
    SDP_PORT_FORMAT_INVALID
} sdp_port_format_e;


/* Fmtp attribute format Types */
typedef enum {
    SDP_FMTP_NTE,
    SDP_FMTP_CODEC_INFO,
    SDP_FMTP_MODE,
    SDP_FMTP_DATACHANNEL,
    SDP_FMTP_UNKNOWN_TYPE,
    SDP_FMTP_MAX_TYPE
} sdp_fmtp_format_type_e;


/* T.38 Rate Mgmt Types */
typedef enum {
    SDP_T38_LOCAL_TCF,
    SDP_T38_TRANSFERRED_TCF,
    SDP_T38_UNKNOWN_RATE,
    SDP_T38_MAX_RATES
} sdp_t38_ratemgmt_e;


/* T.38 udp EC Types */
typedef enum {
    SDP_T38_UDP_REDUNDANCY,
    SDP_T38_UDP_FEC,
    SDP_T38_UDPEC_UNKNOWN,
    SDP_T38_MAX_UDPEC
} sdp_t38_udpec_e;

/* Bitmaps for manipulating sdp_direction_e */
typedef enum {
    SDP_DIRECTION_FLAG_SEND=0x01,
    SDP_DIRECTION_FLAG_RECV=0x02
} sdp_direction_flag_e;

/* Media flow direction */
typedef enum {
    SDP_DIRECTION_INACTIVE = 0,
    SDP_DIRECTION_SENDONLY = SDP_DIRECTION_FLAG_SEND,
    SDP_DIRECTION_RECVONLY = SDP_DIRECTION_FLAG_RECV,
    SDP_DIRECTION_SENDRECV = SDP_DIRECTION_FLAG_SEND | SDP_DIRECTION_FLAG_RECV,
    SDP_MAX_QOS_DIRECTIONS
} sdp_direction_e;

#define SDP_DIRECTION_PRINT(arg) \
    (((sdp_direction_e)(arg)) == SDP_DIRECTION_INACTIVE ? "SDP_DIRECTION_INACTIVE " : \
     ((sdp_direction_e)(arg)) == SDP_DIRECTION_SENDONLY ? "SDP_DIRECTION_SENDONLY": \
     ((sdp_direction_e)(arg)) == SDP_DIRECTION_RECVONLY ? "SDP_DIRECTION_RECVONLY ": \
     ((sdp_direction_e)(arg)) == SDP_DIRECTION_SENDRECV ? " SDP_DIRECTION_SENDRECV": "SDP_MAX_QOS_DIRECTIONS")


/* QOS Strength tag */
typedef enum {
    SDP_QOS_STRENGTH_OPT,
    SDP_QOS_STRENGTH_MAND,
    SDP_QOS_STRENGTH_SUCC,
    SDP_QOS_STRENGTH_FAIL,
    SDP_QOS_STRENGTH_NONE,
    SDP_MAX_QOS_STRENGTH,
    SDP_QOS_STRENGTH_UNKNOWN
} sdp_qos_strength_e;


/* QOS direction */
typedef enum {
    SDP_QOS_DIR_SEND,
    SDP_QOS_DIR_RECV,
    SDP_QOS_DIR_SENDRECV,
    SDP_QOS_DIR_NONE,
    SDP_MAX_QOS_DIR,
    SDP_QOS_DIR_UNKNOWN
} sdp_qos_dir_e;

/* QoS Status types */
typedef enum {
    SDP_QOS_LOCAL,
    SDP_QOS_REMOTE,
    SDP_QOS_E2E,
    SDP_MAX_QOS_STATUS_TYPES,
    SDP_QOS_STATUS_TYPE_UNKNOWN
} sdp_qos_status_types_e;

/* QoS Status types */
typedef enum {
    SDP_CURR_QOS_TYPE,
    SDP_CURR_UNKNOWN_TYPE,
    SDP_MAX_CURR_TYPES
} sdp_curr_type_e;

/* QoS Status types */
typedef enum {
    SDP_DES_QOS_TYPE,
    SDP_DES_UNKNOWN_TYPE,
    SDP_MAX_DES_TYPES
} sdp_des_type_e;

/* QoS Status types */
typedef enum {
    SDP_CONF_QOS_TYPE,
    SDP_CONF_UNKNOWN_TYPE,
    SDP_MAX_CONF_TYPES
} sdp_conf_type_e;


/* Named event range result values. */
typedef enum {
    SDP_NO_MATCH,
    SDP_PARTIAL_MATCH,
    SDP_FULL_MATCH
} sdp_ne_res_e;

/* Fmtp attribute parameters for audio/video codec information */
typedef enum {

    /* mainly for audio codecs */
    SDP_ANNEX_A,     /* 0 */
    SDP_ANNEX_B,
    SDP_BITRATE,

    /* for video codecs */
    SDP_QCIF,
    SDP_CIF,
    SDP_MAXBR,
    SDP_SQCIF,
    SDP_CIF4,
    SDP_CIF16,
    SDP_CUSTOM,
    SDP_PAR,
    SDP_CPCF,
    SDP_BPP,
    SDP_HRD,
    SDP_PROFILE,
    SDP_LEVEL,
    SDP_INTERLACE,

    /* H.264 related */
    SDP_PROFILE_LEVEL_ID,     /* 17 */
    SDP_PARAMETER_SETS,
    SDP_PACKETIZATION_MODE,
    SDP_INTERLEAVING_DEPTH,
    SDP_DEINT_BUF_REQ,
    SDP_MAX_DON_DIFF,
    SDP_INIT_BUF_TIME,

    SDP_MAX_MBPS,
    SDP_MAX_FS,
    SDP_MAX_CPB,
    SDP_MAX_DPB,
    SDP_MAX_BR,
    SDP_REDUNDANT_PIC_CAP,
    SDP_DEINT_BUF_CAP,
    SDP_MAX_RCMD_NALU_SIZE,

    SDP_PARAMETER_ADD,

    /* Annexes - begin */
    /* Some require special handling as they don't have token=token format*/
    SDP_ANNEX_D,
    SDP_ANNEX_F,
    SDP_ANNEX_I,
    SDP_ANNEX_J,
    SDP_ANNEX_T,

    /* These annexes have token=token format */
    SDP_ANNEX_K,
    SDP_ANNEX_N,
    SDP_ANNEX_P,

    SDP_MODE,
    SDP_LEVEL_ASYMMETRY_ALLOWED,
    SDP_MAX_AVERAGE_BIT_RATE,
    SDP_USED_TX,
    SDP_STEREO,
    SDP_USE_IN_BAND_FEC,
    SDP_MAX_CODED_AUDIO_BW,
    SDP_CBR,
    SDP_MAX_FR,
    SDP_MAX_PLAYBACK_RATE,
    SDP_APT,
    SDP_RTX_TIME,
    SDP_MAX_FMTP_PARAM,
    SDP_FMTP_PARAM_UNKNOWN
} sdp_fmtp_codec_param_e;

/* Fmtp attribute parameters values for
   fmtp attribute parameters which convey codec
   information */

typedef enum {
    SDP_YES,
    SDP_NO,
    SDP_MAX_FMTP_PARAM_VAL,
    SDP_FMTP_PARAM_UNKNOWN_VAL
} sdp_fmtp_codec_param_val_e;

/* silenceSupp suppPref */
typedef enum {
    SDP_SILENCESUPP_PREF_STANDARD,
    SDP_SILENCESUPP_PREF_CUSTOM,
    SDP_SILENCESUPP_PREF_NULL, /* "-" */
    SDP_MAX_SILENCESUPP_PREF,
    SDP_SILENCESUPP_PREF_UNKNOWN
} sdp_silencesupp_pref_e;

/* silenceSupp sidUse */
typedef enum {
    SDP_SILENCESUPP_SIDUSE_NOSID,
    SDP_SILENCESUPP_SIDUSE_FIXED,
    SDP_SILENCESUPP_SIDUSE_SAMPLED,
    SDP_SILENCESUPP_SIDUSE_NULL, /* "-" */
    SDP_MAX_SILENCESUPP_SIDUSE,
    SDP_SILENCESUPP_SIDUSE_UNKNOWN
} sdp_silencesupp_siduse_e;

typedef enum {
    SDP_MEDIADIR_ROLE_PASSIVE,
    SDP_MEDIADIR_ROLE_ACTIVE,
    SDP_MEDIADIR_ROLE_BOTH,
    SDP_MEDIADIR_ROLE_REUSE,
    SDP_MEDIADIR_ROLE_UNKNOWN,
    SDP_MAX_MEDIADIR_ROLES,
    SDP_MEDIADIR_ROLE_UNSUPPORTED,
    SDP_MEDIADIR_ROLE_INVALID
} sdp_mediadir_role_e;

typedef enum {
    SDP_GROUP_ATTR_FID,
    SDP_GROUP_ATTR_LS,
    SDP_GROUP_ATTR_ANAT,
    SDP_GROUP_ATTR_BUNDLE,
    SDP_MAX_GROUP_ATTR_VAL,
    SDP_GROUP_ATTR_UNSUPPORTED
} sdp_group_attr_e;

typedef enum {
    SDP_SSRC_GROUP_ATTR_DUP,
    SDP_SSRC_GROUP_ATTR_FEC,
    SDP_SSRC_GROUP_ATTR_FECFR,
    SDP_SSRC_GROUP_ATTR_FID,
    SDP_SSRC_GROUP_ATTR_SIM,
    SDP_MAX_SSRC_GROUP_ATTR_VAL,
    SDP_SSRC_GROUP_ATTR_UNSUPPORTED
} sdp_ssrc_group_attr_e;

typedef enum {
    SDP_SRC_FILTER_INCL,
    SDP_SRC_FILTER_EXCL,
    SDP_MAX_FILTER_MODE,
    SDP_FILTER_MODE_NOT_PRESENT
} sdp_src_filter_mode_e;

typedef enum {
    SDP_RTCP_UNICAST_MODE_REFLECTION,
    SDP_RTCP_UNICAST_MODE_RSI,
    SDP_RTCP_MAX_UNICAST_MODE,
    SDP_RTCP_UNICAST_MODE_NOT_PRESENT
} sdp_rtcp_unicast_mode_e;

typedef enum {
    SDP_CONNECTION_NOT_FOUND = -1,
    SDP_CONNECTION_NEW = 0,
    SDP_CONNECTION_EXISTING,
    SDP_MAX_CONNECTION,
    SDP_CONNECTION_UNKNOWN
} sdp_connection_type_e;

typedef enum {
    SDP_SCTP_MEDIA_FMT_WEBRTC_DATACHANNEL,
    SDP_SCTP_MEDIA_FMT_UNKNOWN
} sdp_sctp_media_fmt_type_e;

/*
 * sdp_srtp_fec_order_t
 *  This type defines the order in which to perform FEC
 *  (Forward Error Correction) and SRTP Encryption/Authentication.
 */
typedef enum sdp_srtp_fec_order_t_ {
    SDP_SRTP_THEN_FEC, /* upon sending perform SRTP then FEC */
    SDP_FEC_THEN_SRTP, /* upon sending perform FEC then SRTP */
    SDP_SRTP_FEC_SPLIT /* upon sending perform SRTP Encryption,
                          * then FEC, the SRTP Authentication */
} sdp_srtp_fec_order_t;


/*
 *  sdp_srtp_crypto_suite_t
 *   Enumeration of the crypto suites supported for MGCP SRTP
 *   package.
 */
typedef enum sdp_srtp_crypto_suite_t_ {
    SDP_SRTP_UNKNOWN_CRYPTO_SUITE = 0,
    SDP_SRTP_AES_CM_128_HMAC_SHA1_32,
    SDP_SRTP_AES_CM_128_HMAC_SHA1_80,
    SDP_SRTP_F8_128_HMAC_SHA1_80,
    SDP_SRTP_MAX_NUM_CRYPTO_SUITES
} sdp_srtp_crypto_suite_t;

/*
 * SDP SRTP crypto suite definition parameters
 *
 * SDP_SRTP_<crypto_suite>_KEY_BYTES
 *  The size of a master key for <crypto_suite> in bytes.
 *
 * SDP_SRTP_<crypto_suite>_SALT_BYTES
 *  The size of a master salt for <crypto_suite> in bytes.
 */
#define SDP_SRTP_AES_CM_128_HMAC_SHA1_32_KEY_BYTES	16
#define SDP_SRTP_AES_CM_128_HMAC_SHA1_32_SALT_BYTES	14
#define SDP_SRTP_AES_CM_128_HMAC_SHA1_80_KEY_BYTES	16
#define SDP_SRTP_AES_CM_128_HMAC_SHA1_80_SALT_BYTES	14
#define SDP_SRTP_F8_128_HMAC_SHA1_80_KEY_BYTES		16
#define SDP_SRTP_F8_128_HMAC_SHA1_80_SALT_BYTES	14

/* SDP Defines */

#define SDP_MAX_LONG_STRING_LEN 4096 /* Max len for long SDP strings */
#define SDP_MAX_STRING_LEN      256  /* Max len for SDP string       */
#define SDP_MAX_SHORT_STRING_LEN      12  /* Max len for a short SDP string  */
#define SDP_MAX_PAYLOAD_TYPES   23  /* Max payload types in m= line */
#define SDP_TOKEN_LEN           2   /* Len of <token>=              */
#define SDP_CURRENT_VERSION     0   /* Current default SDP version  */
#define SDP_MAX_PORT_PARAMS     4   /* Max m= port params - x/x/x/x */
#define SDP_MIN_DYNAMIC_PAYLOAD 96  /* Min dynamic payload */
#define SDP_MAX_DYNAMIC_PAYLOAD 127 /* Max dynamic payload */
#define SDP_MIN_CIF_VALUE 1  /* applies to all  QCIF,CIF,CIF4,CIF16,SQCIF */
#define SDP_MAX_CIF_VALUE 32 /* applies to all  QCIF,CIF,CIF4,CIF16,SQCIF */
#define SDP_MAX_SRC_ADDR_LIST  1 /* Max source addrs for which filter applies */


#define SDP_DEFAULT_PACKETIZATION_MODE_VALUE 0 /* max packetization mode for H.264 */
#define SDP_MAX_PACKETIZATION_MODE_VALUE 2 /* max packetization mode for H.264 */
#define SDP_INVALID_PACKETIZATION_MODE_VALUE 255

#define SDP_MAX_LEVEL_ASYMMETRY_ALLOWED_VALUE 1 /* max level asymmetry allowed value for H.264 */
#define SDP_DEFAULT_LEVEL_ASYMMETRY_ALLOWED_VALUE 0 /* default level asymmetry allowed value for H.264 */
#define SDP_INVALID_LEVEL_ASYMMETRY_ALLOWED_VALUE 2 /* invalid value for level-asymmetry-allowed param for H.264 */


/* Max number of stream ids that can be grouped together */
#define SDP_MAX_MEDIA_STREAMS 128

#define SDP_UNSUPPORTED         "Unsupported"

#define SDP_MAX_PROFILE_VALUE  10
#define SDP_MAX_LEVEL_VALUE    100
#define SDP_MIN_PROFILE_LEVEL_VALUE 0
#define SDP_MAX_TTL_VALUE  255
#define SDP_MIN_MCAST_ADDR_HI_BIT_VAL 224
#define SDP_MAX_MCAST_ADDR_HI_BIT_VAL 239

#define SDP_MAX_SSRC_GROUP_SSRCS 32 /* max number of ssrcs allowed in a ssrc-group */

/* SDP Enum Types */

typedef enum {
    SDP_ERR_INVALID_CONF_PTR,
    SDP_ERR_INVALID_SDP_PTR,
    SDP_ERR_INTERNAL,
    SDP_MAX_ERR_TYPES
} sdp_errmsg_e;

/* SDP Structure Definitions */

/* String names of varios tokens */
typedef struct {
    char                     *name;
    uint8_t                        strlen;
} sdp_namearray_t;

/* c= line info */
typedef struct {
    sdp_nettype_e             nettype;
    sdp_addrtype_e            addrtype;
    char                      conn_addr[SDP_MAX_STRING_LEN+1];
    tinybool                  is_multicast;
    uint16_t                       ttl;
    uint16_t                       num_of_addresses;
} sdp_conn_t;

/* t= line info */
typedef struct sdp_timespec {
    char                      start_time[SDP_MAX_STRING_LEN+1];
    char                      stop_time[SDP_MAX_STRING_LEN+1];
    struct sdp_timespec      *next_p;
} sdp_timespec_t;


/* k= line info */
typedef struct sdp_encryptspec {
    sdp_encrypt_type_e        encrypt_type;
    char              encrypt_key[SDP_MAX_STRING_LEN+1];
} sdp_encryptspec_t;


/* FMTP attribute deals with named events in the range of 0-255 as
 * defined in RFC 2833 */
#define SDP_MIN_NE_VALUE      0
#define SDP_MAX_NE_VALUES     256
#define SDP_NE_BITS_PER_WORD  ( sizeof(uint32_t) * 8 )
#define SDP_NE_NUM_BMAP_WORDS ((SDP_MAX_NE_VALUES + SDP_NE_BITS_PER_WORD - 1)/SDP_NE_BITS_PER_WORD )
#define SDP_NE_BIT_0          ( 0x00000001 )
#define SDP_NE_ALL_BITS       ( 0xFFFFFFFF )

#define SDP_DEINT_BUF_REQ_FLAG   0x1
#define SDP_INIT_BUF_TIME_FLAG   0x2
#define SDP_MAX_RCMD_NALU_SIZE_FLAG   0x4
#define SDP_DEINT_BUF_CAP_FLAG   0x8

#define SDP_FMTP_UNUSED          0xFFFF

typedef struct sdp_fmtp {
    uint16_t                       payload_num;
    uint32_t                       maxval;  /* maxval optimizes bmap search */
    uint32_t                       bmap[ SDP_NE_NUM_BMAP_WORDS ];
    sdp_fmtp_format_type_e    fmtp_format; /* Gives the format type
                                              for FMTP attribute*/
    tinybool                  annexb_required;
    tinybool                  annexa_required;

    tinybool                  annexa;
    tinybool                  annexb;
    uint32_t                       bitrate;
    uint32_t                       mode;

    /* some OPUS specific fmtp params */
    uint32_t                       maxplaybackrate;
    uint32_t                       maxaveragebitrate;
    uint16_t                       usedtx;
    uint16_t                       stereo;
    uint16_t                       useinbandfec;
    char                      maxcodedaudiobandwidth[SDP_MAX_STRING_LEN+1];
    uint16_t                       cbr;

    /* BEGIN - All Video related FMTP parameters */
    uint16_t                       qcif;
    uint16_t                       cif;
    uint16_t                       maxbr;
    uint16_t                       sqcif;
    uint16_t                       cif4;
    uint16_t                       cif16;

    uint16_t                       custom_x;
    uint16_t                       custom_y;
    uint16_t                       custom_mpi;
    /* CUSTOM=360,240,4 implies X-AXIS=360, Y-AXIS=240; MPI=4 */
    uint16_t                       par_width;
    uint16_t                       par_height;
    /* PAR=12:11 implies par_width=12, par_height=11 */

    /* CPCF should be a float. IOS does not support float and so it is uint16_t */
    /* For portable stack, CPCF should be defined as float and the parsing should
     * be modified accordingly */
    uint16_t                       cpcf;
    uint16_t                       bpp;
    uint16_t                       hrd;

    int16_t                     profile;
    int16_t                     level;
    tinybool                  is_interlace;

    /* some more H.264 specific fmtp params */
    char              profile_level_id[SDP_MAX_STRING_LEN+1];
    char                      parameter_sets[SDP_MAX_STRING_LEN+1];
    uint16_t                       packetization_mode;
    uint16_t                       level_asymmetry_allowed;
    uint16_t                       interleaving_depth;
    uint32_t                       deint_buf_req;
    uint32_t                       max_don_diff;
    uint32_t                       init_buf_time;

    uint32_t                       max_mbps;
    uint32_t                       max_fs;
    uint32_t                       max_fr;
    uint32_t                       max_cpb;
    uint32_t                       max_dpb;
    uint32_t                       max_br;
    tinybool                  redundant_pic_cap;
    uint32_t                       deint_buf_cap;
    uint32_t                       max_rcmd_nalu_size;
    uint16_t                       parameter_add;

    tinybool                  annex_d;

    tinybool                  annex_f;
    tinybool                  annex_i;
    tinybool                  annex_j;
    tinybool                  annex_t;

    /* H.263 codec requires annex K,N and P to have values */
    uint16_t                       annex_k_val;
    uint16_t                       annex_n_val;

    /* RFC 5109 Section 4.2 for specifying redundant encodings */
    uint8_t              redundant_encodings[SDP_FMTP_MAX_REDUNDANT_ENCODINGS];

    /* RFC 2833 Section 3.9 (4733) for specifying support DTMF tones:
       The list of values consists of comma-separated elements, which
       can be either a single decimal number or two decimal numbers
       separated by a hyphen (dash), where the second number is larger
       than the first. No whitespace is allowed between numbers or
       hyphens. The list does not have to be sorted.
     */
    char                 dtmf_tones[SDP_MAX_STRING_LEN+1];

    /* Annex P can take one or more values in the range 1-4 . e.g P=1,3 */
    uint16_t                       annex_p_val_picture_resize; /* 1 = four; 2 = sixteenth */
    uint16_t                       annex_p_val_warp; /* 3 = half; 4=sixteenth */

    uint8_t                        flag;

    /* RTX parameters */
    uint8_t apt;
    tinybool has_rtx_time;
    uint32_t rtx_time;

  /* END - All Video related FMTP parameters */

} sdp_fmtp_t;

/* a=sctpmap line used for Datachannels */
typedef struct sdp_sctpmap {
    uint16_t                       port;
    uint32_t                       streams;   /* Num streams per Datachannel */
    char                      protocol[SDP_MAX_STRING_LEN+1];
} sdp_sctpmap_t;

#define SDP_MAX_MSID_LEN 64

typedef struct sdp_msid {
  char                      identifier[SDP_MAX_MSID_LEN+1];
  char                      appdata[SDP_MAX_MSID_LEN+1];
} sdp_msid_t;

/* a=qos|secure|X-pc-qos|X-qos info */
typedef struct sdp_qos {
    sdp_qos_strength_e        strength;
    sdp_qos_dir_e             direction;
    tinybool                  confirm;
    sdp_qos_status_types_e    status_type;
} sdp_qos_t;

/* a=curr:qos status_type direction */
typedef struct sdp_curr {
    sdp_curr_type_e           type;
    sdp_qos_status_types_e    status_type;
    sdp_qos_dir_e             direction;
} sdp_curr_t;

/* a=des:qos strength status_type direction */
typedef struct sdp_des {
    sdp_des_type_e            type;
    sdp_qos_strength_e        strength;
    sdp_qos_status_types_e    status_type;
    sdp_qos_dir_e             direction;
} sdp_des_t;

/* a=conf:qos status_type direction */
typedef struct sdp_conf {
    sdp_conf_type_e           type;
    sdp_qos_status_types_e    status_type;
    sdp_qos_dir_e             direction;
} sdp_conf_t;


/* a=rtpmap or a=sprtmap info */
typedef struct sdp_transport_map {
    uint16_t                       payload_num;
    char                      encname[SDP_MAX_STRING_LEN+1];
    uint32_t                       clockrate;
    uint16_t                       num_chan;
} sdp_transport_map_t;


/* a=rtr info */
typedef struct sdp_rtr {
    tinybool                  confirm;
} sdp_rtr_t;

/* a=subnet info */
typedef struct sdp_subnet {
    sdp_nettype_e             nettype;
    sdp_addrtype_e            addrtype;
    char                      addr[SDP_MAX_STRING_LEN+1];
    int32_t                     prefix;
} sdp_subnet_t;


/* a=X-pc-codec info */
typedef struct sdp_pccodec {
    uint16_t                       num_payloads;
    ushort                    payload_type[SDP_MAX_PAYLOAD_TYPES];
} sdp_pccodec_t;

/* a=direction info */
typedef struct sdp_comediadir {
    sdp_mediadir_role_e      role;
    tinybool                 conn_info_present;
    sdp_conn_t               conn_info;
    uint32_t                      src_port;
} sdp_comediadir_t;



/* a=silenceSupp info */
typedef struct sdp_silencesupp {
    tinybool                  enabled;
    tinybool                  timer_null;
    uint16_t                       timer;
    sdp_silencesupp_pref_e    pref;
    sdp_silencesupp_siduse_e  siduse;
    tinybool                  fxnslevel_null;
    uint8_t                        fxnslevel;
} sdp_silencesupp_t;


/*
 * a=mptime info */
/* Note that an interval value of zero corresponds to
 * the "-" syntax on the a= line.
 */
typedef struct sdp_mptime {
    uint16_t                       num_intervals;
    ushort                    intervals[SDP_MAX_PAYLOAD_TYPES];
} sdp_mptime_t;

/*
 * a=X-sidin:<val>, a=X-sidout:< val> and a=X-confid: <val>
 * Stream Id,ConfID related attributes to be used for audio/video conferencing
 *
*/

typedef struct sdp_stream_data {
    char                      x_sidin[SDP_MAX_STRING_LEN+1];
    char                      x_sidout[SDP_MAX_STRING_LEN+1];
    char                      x_confid[SDP_MAX_STRING_LEN+1];
    sdp_group_attr_e          group_attr; /* FID or LS */
    uint16_t                       num_group_id;
    char *                    group_ids[SDP_MAX_MEDIA_STREAMS];
} sdp_stream_data_t;

typedef struct sdp_msid_semantic {
    char semantic[SDP_MAX_STRING_LEN+1];
    char * msids[SDP_MAX_MEDIA_STREAMS];
} sdp_msid_semantic_t;

/*
 * a=source-filter:<filter-mode> <filter-spec>
 * <filter-spec> = <nettype> <addrtype> <dest-addr> <src_addr><src_addr>...
 * One or more source addresses to apply filter, for one or more connection
 * address in unicast/multicast environments
 */
typedef struct sdp_source_filter {
   sdp_src_filter_mode_e  mode;
   sdp_nettype_e     nettype;
   sdp_addrtype_e    addrtype;
   char              dest_addr[SDP_MAX_STRING_LEN+1];
   uint16_t               num_src_addr;
   char              src_list[SDP_MAX_SRC_ADDR_LIST+1][SDP_MAX_STRING_LEN+1];
} sdp_source_filter_t;

/*
 * a=rtcp-fb:<payload-type> <feedback-type> [<feedback-parameters>]
 * Defines RTCP feedback parameters
 */
#define SDP_ALL_PAYLOADS         0xFFFF
typedef struct sdp_fmtp_fb {
    uint16_t                          payload_num;    /* can be SDP_ALL_PAYLOADS */
    sdp_rtcp_fb_type_e           feedback_type;
    union {
        sdp_rtcp_fb_ack_type_e   ack;
        sdp_rtcp_fb_ccm_type_e   ccm;
        sdp_rtcp_fb_nack_type_e  nack;
        uint32_t                      trr_int;
    } param;
    char extra[SDP_MAX_STRING_LEN + 1]; /* Holds any trailing information that
                                           cannot be represented by preceding
                                           fields. */
} sdp_fmtp_fb_t;

typedef struct sdp_rtcp {
   sdp_nettype_e     nettype;
   sdp_addrtype_e    addrtype;
   char              addr[SDP_MAX_STRING_LEN+1];
   uint16_t          port;
} sdp_rtcp_t;

/*
 * b=<bw-modifier>:<val>
 *
*/
typedef struct sdp_bw_data {
    struct sdp_bw_data       *next_p;
    sdp_bw_modifier_e        bw_modifier;
    int                      bw_val;
} sdp_bw_data_t;

/*
 * This structure houses a linked list of sdp_bw_data_t instances. Each
 * sdp_bw_data_t instance represents one b= line.
 */
typedef struct sdp_bw {
    uint16_t                      bw_data_count;
    sdp_bw_data_t            *bw_data_list;
} sdp_bw_t;

/* Media lines for AAL2 may have more than one transport type defined
 * each with its own payload type list.  These are referred to as
 * profile types instead of transport types.  This structure is used
 * to handle these multiple profile types. Note: One additional profile
 * field is needed because of the way parsing is done.  This is not an
 * error. */
typedef struct sdp_media_profiles {
    uint16_t             num_profiles;
    sdp_transport_e profile[SDP_MAX_PROFILES+1];
    uint16_t             num_payloads[SDP_MAX_PROFILES];
    sdp_payload_ind_e payload_indicator[SDP_MAX_PROFILES][SDP_MAX_PAYLOAD_TYPES];
    uint16_t             payload_type[SDP_MAX_PROFILES][SDP_MAX_PAYLOAD_TYPES];
} sdp_media_profiles_t;
/*
 * a=extmap:<value>["/"<direction>] <URI> <extensionattributes>
 *
 */
typedef struct sdp_extmap {
    uint16_t              id;
    sdp_direction_e  media_direction;
    tinybool         media_direction_specified;
    char             uri[SDP_MAX_STRING_LEN+1];
    char             extension_attributes[SDP_MAX_STRING_LEN+1];
} sdp_extmap_t;

typedef struct sdp_ssrc {
    uint32_t ssrc;
    char     attribute[SDP_MAX_STRING_LEN + 1];
} sdp_ssrc_t;

typedef struct sdp_ssrc_group {
    sdp_ssrc_group_attr_e semantic;
    uint16_t num_ssrcs;
    uint32_t ssrcs[SDP_MAX_SSRC_GROUP_SSRCS];
} sdp_ssrc_group_t;

/*
 * sdp_srtp_crypto_context_t
 *  This type is used to hold cryptographic context information.
 *
 */
typedef struct sdp_srtp_crypto_context_t_ {
    int32_t                   tag;
    unsigned long           selection_flags;
    sdp_srtp_crypto_suite_t suite;
    unsigned char           master_key[SDP_SRTP_MAX_KEY_SIZE_BYTES];
    unsigned char           master_salt[SDP_SRTP_MAX_SALT_SIZE_BYTES];
    unsigned char           master_key_size_bytes;
    unsigned char           master_salt_size_bytes;
    unsigned long           ssrc; /* not used */
    unsigned long           roc;  /* not used */
    unsigned long           kdr;  /* not used */
    unsigned short          seq;  /* not used */
    sdp_srtp_fec_order_t    fec_order; /* not used */
    unsigned char           master_key_lifetime[SDP_SRTP_MAX_LIFETIME_BYTES];
    unsigned char           mki[SDP_SRTP_MAX_MKI_SIZE_BYTES];
    uint16_t                     mki_size_bytes;
    char*                   session_parameters;
} sdp_srtp_crypto_context_t;


/* m= line info and associated attribute list */
/* Note: Most of the port parameter values are 16-bit values.  We set
 * the type to int32_t so we can return either a 16-bit value or the
 * choose value. */
typedef struct sdp_mca {
    sdp_media_e               media;
    sdp_conn_t                conn;
    sdp_transport_e           transport;
    sdp_port_format_e         port_format;
    int32_t                     port;
    int32_t                     sctpport;
    sdp_sctp_media_fmt_type_e   sctp_fmt;
    int32_t                     num_ports;
    int32_t                     vpi;
    uint32_t                       vci;  /* VCI needs to be 32-bit */
    int32_t                     vcci;
    int32_t                     cid;
    uint16_t                       num_payloads;
    sdp_payload_ind_e         payload_indicator[SDP_MAX_PAYLOAD_TYPES];
    uint16_t                       payload_type[SDP_MAX_PAYLOAD_TYPES];
    sdp_media_profiles_t     *media_profiles_p;
    tinybool                  sessinfo_found;
    sdp_encryptspec_t         encrypt;
    sdp_bw_t                  bw;
    sdp_attr_e                media_direction; /* Either INACTIVE, SENDONLY,
                                                  RECVONLY, or SENDRECV */
    uint32_t                       mid;
    uint32_t                       line_number;
    struct sdp_attr          *media_attrs_p;
    struct sdp_mca           *next_p;
} sdp_mca_t;


/* generic a= line info */
typedef struct sdp_attr {
    sdp_attr_e                type;
    uint32_t                       line_number;
    union {
        tinybool              boolean_val;
        uint32_t                   u32_val;
        char                  string_val[SDP_MAX_STRING_LEN+1];
        char *stringp;
        char                  ice_attr[SDP_MAX_STRING_LEN+1];
        sdp_fmtp_t            fmtp;
        sdp_sctpmap_t         sctpmap;
        sdp_msid_t            msid;
        sdp_qos_t             qos;
        sdp_curr_t            curr;
        sdp_des_t             des;
        sdp_conf_t            conf;
        sdp_transport_map_t   transport_map;    /* A rtpmap or sprtmap */
        sdp_subnet_t          subnet;
        sdp_t38_ratemgmt_e    t38ratemgmt;
        sdp_t38_udpec_e       t38udpec;
        sdp_pccodec_t         pccodec;
        sdp_silencesupp_t     silencesupp;
        sdp_mca_t            *cap_p;    /* A X-CAP or CDSC attribute */
        sdp_rtr_t             rtr;
        sdp_comediadir_t      comediadir;
        sdp_srtp_crypto_context_t srtp_context;
        sdp_mptime_t          mptime;
        sdp_stream_data_t     stream_data;
        sdp_msid_semantic_t   msid_semantic;
        char                  unknown[SDP_MAX_STRING_LEN+1];
        sdp_source_filter_t   source_filter;
        sdp_fmtp_fb_t         rtcp_fb;
        sdp_rtcp_t            rtcp;
        sdp_setup_type_e      setup;
        sdp_connection_type_e connection;
        sdp_extmap_t          extmap;
        sdp_ssrc_t            ssrc;
        sdp_ssrc_group_t      ssrc_group;
    } attr;
    struct sdp_attr          *next_p;
} sdp_attr_t;
typedef struct sdp_srtp_crypto_suite_list_ {
    sdp_srtp_crypto_suite_t crypto_suite_val;
    char * crypto_suite_str;
    unsigned char key_size_bytes;
    unsigned char salt_size_bytes;
} sdp_srtp_crypto_suite_list;

typedef void (*sdp_parse_error_handler)(void *context,
                                        uint32_t line,
                                        const char *message);

/* Application configuration options */
typedef struct sdp_conf_options {
    tinybool                  debug_flag[SDP_MAX_DEBUG_TYPES];
    tinybool                  version_reqd;
    tinybool                  owner_reqd;
    tinybool                  session_name_reqd;
    tinybool                  timespec_reqd;
    tinybool                  media_supported[SDP_MAX_MEDIA_TYPES];
    tinybool                  nettype_supported[SDP_MAX_NETWORK_TYPES];
    tinybool                  addrtype_supported[SDP_MAX_ADDR_TYPES];
    tinybool                  transport_supported[SDP_MAX_TRANSPORT_TYPES];
    tinybool                  allow_choose[SDP_MAX_CHOOSE_PARAMS];
    /* Statistics counts */
    uint32_t                       num_builds;
    uint32_t                       num_parses;
    uint32_t                       num_not_sdp_desc;
    uint32_t                       num_invalid_token_order;
    uint32_t                       num_invalid_param;
    uint32_t                       num_no_resource;
    struct sdp_conf_options  *next_p;
    sdp_parse_error_handler  error_handler;
    void                    *error_handler_context;
} sdp_conf_options_t;


/* Session level SDP info with pointers to media line info. */
/* Elements here that can only be one of are included directly. Elements */
/* that can be more than one are pointers.                               */
typedef struct {
    sdp_conf_options_t       *conf_p;
    tinybool                  debug_flag[SDP_MAX_DEBUG_TYPES];
    char                      debug_str[SDP_MAX_STRING_LEN+1];
    uint32_t                       debug_id;
    int32_t                     version; /* version is really a uint16_t */
    char                      owner_name[SDP_MAX_STRING_LEN+1];
    char                      owner_sessid[SDP_MAX_STRING_LEN+1];
    char                      owner_version[SDP_MAX_STRING_LEN+1];
    sdp_nettype_e             owner_network_type;
    sdp_addrtype_e            owner_addr_type;
    char                      owner_addr[SDP_MAX_STRING_LEN+1];
    char                      sessname[SDP_MAX_STRING_LEN+1];
    tinybool                  sessinfo_found;
    tinybool                  uri_found;
    sdp_conn_t                default_conn;
    sdp_timespec_t           *timespec_p;
    sdp_encryptspec_t         encrypt;
    sdp_bw_t                  bw;
    sdp_attr_t               *sess_attrs_p;

    /* Info to help with building capability attributes. */
    uint16_t                       cur_cap_num;
    sdp_mca_t                *cur_cap_p;
    /* Info to help parsing X-cpar attrs. */
    uint16_t                       cap_valid;
    uint16_t                       last_cap_inst;
    /* Info to help building X-cpar/cpar attrs. */
    sdp_attr_e            last_cap_type;

    /* Facilitates reporting line number for SDP errors */
    uint32_t                       parse_line;

    /* MCA - Media, connection, and attributes */
    sdp_mca_t                *mca_p;
    ushort                    mca_count;
} sdp_t;


/* Token processing table. */
typedef struct {
    char *name;
    sdp_result_e (*parse_func)(sdp_t *sdp_p, uint16_t level, const char *ptr);
    sdp_result_e (*build_func)(sdp_t *sdp_p, uint16_t level, flex_string *fs);
} sdp_tokenarray_t;

/* Attribute processing table. */
typedef struct {
    char *name;
    uint16_t strlen;
    sdp_result_e (*parse_func)(sdp_t *sdp_p, sdp_attr_t *attr_p,
                               const char *ptr);
    sdp_result_e (*build_func)(sdp_t *sdp_p, sdp_attr_t *attr_p,
                               flex_string *fs);
} sdp_attrarray_t;


/* Prototypes */

/* sdp_config.c */
extern sdp_conf_options_t *sdp_init_config(void);
extern void sdp_free_config(sdp_conf_options_t *config_p);
extern void sdp_appl_debug(sdp_conf_options_t *config_p, sdp_debug_e debug_type,
                           tinybool debug_flag);
extern void sdp_require_version(sdp_conf_options_t *config_p, tinybool version_required);
extern void sdp_require_owner(sdp_conf_options_t *config_p, tinybool owner_required);
extern void sdp_require_session_name(sdp_conf_options_t *config_p,
                                     tinybool sess_name_required);
extern void sdp_require_timespec(sdp_conf_options_t *config_p, tinybool timespec_required);
extern void sdp_media_supported(sdp_conf_options_t *config_p, sdp_media_e media_type,
                         tinybool media_supported);
extern void sdp_nettype_supported(sdp_conf_options_t *config_p, sdp_nettype_e nettype,
                           tinybool nettype_supported);
extern void sdp_addrtype_supported(sdp_conf_options_t *config_p, sdp_addrtype_e addrtype,
                            tinybool addrtype_supported);
extern void sdp_transport_supported(sdp_conf_options_t *config_p, sdp_transport_e transport,
                             tinybool transport_supported);
extern void sdp_allow_choose(sdp_conf_options_t *config_p, sdp_choose_param_e param,
                             tinybool choose_allowed);
extern void sdp_config_set_error_handler(sdp_conf_options_t *config_p,
                                         sdp_parse_error_handler handler,
                                         void *context);

/* sdp_main.c */
extern sdp_t *sdp_init_description(sdp_conf_options_t *config_p);
extern void sdp_debug(sdp_t *sdp_ptr, sdp_debug_e debug_type, tinybool debug_flag);
extern void sdp_set_string_debug(sdp_t *sdp_ptr, const char *debug_str);
extern sdp_result_e sdp_parse(sdp_t *sdp_ptr, const char *buf, size_t len);
extern sdp_result_e sdp_build(sdp_t *sdp_ptr, flex_string *fs);
extern sdp_result_e sdp_free_description(sdp_t *sdp_ptr);
extern void sdp_parse_error(sdp_t *sdp, const char *format, ...);

extern const char *sdp_get_result_name(sdp_result_e rc);


/* sdp_access.c */
extern tinybool sdp_version_valid(sdp_t *sdp_p);
extern int32_t sdp_get_version(sdp_t *sdp_p);
extern sdp_result_e sdp_set_version(sdp_t *sdp_p, int32_t version);

extern tinybool sdp_owner_valid(sdp_t *sdp_p);
extern const char *sdp_get_owner_username(sdp_t *sdp_p);
extern const char *sdp_get_owner_sessionid(sdp_t *sdp_p);
extern const char *sdp_get_owner_version(sdp_t *sdp_p);
extern sdp_nettype_e sdp_get_owner_network_type(sdp_t *sdp_p);
extern sdp_addrtype_e sdp_get_owner_address_type(sdp_t *sdp_p);
extern const char *sdp_get_owner_address(sdp_t *sdp_p);
extern sdp_result_e sdp_set_owner_username(sdp_t *sdp_p, const char *username);
extern sdp_result_e sdp_set_owner_sessionid(sdp_t *sdp_p, const char *sessid);
extern sdp_result_e sdp_set_owner_version(sdp_t *sdp_p, const char *version);
extern sdp_result_e sdp_set_owner_network_type(sdp_t *sdp_p,
                                               sdp_nettype_e network_type);
extern sdp_result_e sdp_set_owner_address_type(sdp_t *sdp_p,
                                               sdp_addrtype_e address_type);
extern sdp_result_e sdp_set_owner_address(sdp_t *sdp_p, const char *address);

extern tinybool sdp_session_name_valid(sdp_t *sdp_p);
extern const char *sdp_get_session_name(sdp_t *sdp_p);
extern sdp_result_e sdp_set_session_name(sdp_t *sdp_p, const char *sessname);

extern tinybool sdp_timespec_valid(sdp_t *sdp_ptr);
extern const char *sdp_get_time_start(sdp_t *sdp_ptr);
extern const char *sdp_get_time_stop(sdp_t *sdp_ptr);
sdp_result_e sdp_set_time_start(sdp_t *sdp_p, const char *start_time);
sdp_result_e sdp_set_time_stop(sdp_t *sdp_p, const char *stop_time);

extern tinybool sdp_encryption_valid(sdp_t *sdp_p, uint16_t level);
extern sdp_encrypt_type_e sdp_get_encryption_method(sdp_t *sdp_p, uint16_t level);
extern const char *sdp_get_encryption_key(sdp_t *sdp_p, uint16_t level);

extern tinybool sdp_connection_valid(sdp_t *sdp_p, uint16_t level);
extern tinybool sdp_bw_line_exists(sdp_t *sdp_p, uint16_t level, uint16_t inst_num);
extern tinybool sdp_bandwidth_valid(sdp_t *sdp_p, uint16_t level, uint16_t inst_num);
extern sdp_nettype_e sdp_get_conn_nettype(sdp_t *sdp_p, uint16_t level);
extern sdp_addrtype_e sdp_get_conn_addrtype(sdp_t *sdp_p, uint16_t level);
extern const char *sdp_get_conn_address(sdp_t *sdp_p, uint16_t level);

extern tinybool sdp_is_mcast_addr (sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_mcast_ttl(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_mcast_num_of_addresses(sdp_t *sdp_p, uint16_t level);

extern sdp_result_e sdp_set_conn_nettype(sdp_t *sdp_p, uint16_t level,
                                  sdp_nettype_e nettype);
extern sdp_result_e sdp_set_conn_addrtype(sdp_t *sdp_p, uint16_t level,
                                   sdp_addrtype_e addrtype);
extern sdp_result_e sdp_set_conn_address(sdp_t *sdp_p, uint16_t level,
                                         const char *address);

extern tinybool sdp_media_line_valid(sdp_t *sdp_p, uint16_t level);
extern uint16_t sdp_get_num_media_lines(sdp_t *sdp_ptr);
extern sdp_media_e sdp_get_media_type(sdp_t *sdp_p, uint16_t level);
extern uint32_t sdp_get_media_line_number(sdp_t *sdp_p, uint16_t level);
extern sdp_port_format_e sdp_get_media_port_format(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_media_portnum(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_media_portcount(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_media_vpi(sdp_t *sdp_p, uint16_t level);
extern uint32_t sdp_get_media_vci(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_media_vcci(sdp_t *sdp_p, uint16_t level);
extern int32_t sdp_get_media_cid(sdp_t *sdp_p, uint16_t level);
extern sdp_transport_e sdp_get_media_transport(sdp_t *sdp_p, uint16_t level);
extern uint16_t sdp_get_media_num_profiles(sdp_t *sdp_p, uint16_t level);
extern sdp_transport_e sdp_get_media_profile(sdp_t *sdp_p, uint16_t level,
                                              uint16_t profile_num);
extern uint16_t sdp_get_media_num_payload_types(sdp_t *sdp_p, uint16_t level);
extern uint16_t sdp_get_media_profile_num_payload_types(sdp_t *sdp_p, uint16_t level,
                                                    uint16_t profile_num);
extern rtp_ptype sdp_get_known_payload_type(sdp_t *sdp_p,
                                            uint16_t level,
                                            uint16_t payload_type_raw);
extern uint32_t sdp_get_media_payload_type(sdp_t *sdp_p, uint16_t level,
                                uint16_t payload_num, sdp_payload_ind_e *indicator);
extern uint32_t sdp_get_media_profile_payload_type(sdp_t *sdp_p, uint16_t level,
                  uint16_t prof_num, uint16_t payload_num, sdp_payload_ind_e *indicator);
extern sdp_result_e sdp_insert_media_line(sdp_t *sdp_p, uint16_t level);
extern sdp_result_e sdp_set_media_type(sdp_t *sdp_p, uint16_t level,
                                       sdp_media_e media);
extern sdp_result_e sdp_set_media_portnum(sdp_t *sdp_p, uint16_t level,
                                          int32_t portnum, int32_t sctpport);
extern int32_t sdp_get_media_sctp_port(sdp_t *sdp_p, uint16_t level);
extern sdp_sctp_media_fmt_type_e sdp_get_media_sctp_fmt(sdp_t *sdp_p, uint16_t level);
extern sdp_result_e sdp_set_media_transport(sdp_t *sdp_p, uint16_t level,
                                            sdp_transport_e transport);
extern sdp_result_e sdp_add_media_profile(sdp_t *sdp_p, uint16_t level,
                                           sdp_transport_e profile);
extern sdp_result_e sdp_add_media_payload_type(sdp_t *sdp_p, uint16_t level,
                               uint16_t payload_type, sdp_payload_ind_e indicator);
extern sdp_result_e sdp_add_media_profile_payload_type(sdp_t *sdp_p,
                               uint16_t level, uint16_t prof_num, uint16_t payload_type,
                               sdp_payload_ind_e indicator);

/* sdp_attr_access.c */
extern sdp_attr_t *sdp_find_attr (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
                                  sdp_attr_e attr_type, uint16_t inst_num);

extern int sdp_find_fmtp_inst(sdp_t *sdp_ptr, uint16_t level, uint16_t payload_num);
extern sdp_result_e sdp_add_new_attr(sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
                                     sdp_attr_e attr_type, uint16_t *inst_num);
extern sdp_result_e sdp_attr_num_instances(sdp_t *sdp_p, uint16_t level,
                         uint8_t cap_num, sdp_attr_e attr_type, uint16_t *num_attr_inst);
extern tinybool sdp_attr_valid(sdp_t *sdp_p, sdp_attr_e attr_type,
                                uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern uint32_t sdp_attr_line_number(sdp_t *sdp_p, sdp_attr_e attr_type,
                                uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_simple_string(sdp_t *sdp_p,
                   sdp_attr_e attr_type, uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_long_string(sdp_t *sdp_p,
                   sdp_attr_e attr_type, uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern uint32_t sdp_attr_get_simple_u32(sdp_t *sdp_p, sdp_attr_e attr_type,
                                    uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_simple_boolean(sdp_t *sdp_p,
                   sdp_attr_e attr_type, uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_is_present (sdp_t *sdp_p, sdp_attr_e attr_type,
                                     uint16_t level, uint8_t cap_num);
extern const char* sdp_attr_get_maxprate(sdp_t *sdp_p, uint16_t level,
                                         uint16_t inst_num);
extern sdp_t38_ratemgmt_e sdp_attr_get_t38ratemgmt(sdp_t *sdp_p, uint16_t level,
                                                   uint8_t cap_num, uint16_t inst_num);
extern sdp_t38_udpec_e sdp_attr_get_t38udpec(sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num);
extern sdp_direction_e sdp_get_media_direction(sdp_t *sdp_p, uint16_t level,
                                               uint8_t cap_num);
extern sdp_qos_strength_e sdp_attr_get_qos_strength(sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_qos_status_types_e sdp_attr_get_qos_status_type (sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_qos_dir_e sdp_attr_get_qos_direction(sdp_t *sdp_p, uint16_t level,
                               uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern tinybool sdp_attr_get_qos_confirm(sdp_t *sdp_p, uint16_t level,
                               uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_curr_type_e sdp_attr_get_curr_type (sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_des_type_e sdp_attr_get_des_type (sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_conf_type_e sdp_attr_get_conf_type (sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, sdp_attr_e qos_attr, uint16_t inst_num);
extern sdp_nettype_e sdp_attr_get_subnet_nettype(sdp_t *sdp_p, uint16_t level,
                                                 uint8_t cap_num, uint16_t inst_num);
extern sdp_addrtype_e sdp_attr_get_subnet_addrtype(sdp_t *sdp_p, uint16_t level,
                                                   uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_subnet_addr(sdp_t *sdp_p, uint16_t level,
                                            uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_subnet_prefix(sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num);
extern rtp_ptype sdp_attr_get_rtpmap_known_codec(sdp_t *sdp_p, uint16_t level,
                                                 uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_rtpmap_payload_valid(sdp_t *sdp_p, uint16_t level,
                                  uint8_t cap_num, uint16_t *inst_num, uint16_t payload_type);
extern uint16_t sdp_attr_get_rtpmap_payload_type(sdp_t *sdp_p, uint16_t level,
                                            uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_rtpmap_encname(sdp_t *sdp_p, uint16_t level,
                                               uint8_t cap_num, uint16_t inst_num);
extern uint32_t sdp_attr_get_rtpmap_clockrate(sdp_t *sdp_p, uint16_t level,
                                         uint8_t cap_num, uint16_t inst_num);
extern uint16_t sdp_attr_get_rtpmap_num_chan(sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_sprtmap_payload_valid(sdp_t *sdp_p, uint16_t level,
                                  uint8_t cap_num, uint16_t *inst_num, uint16_t payload_type);
extern uint16_t sdp_attr_get_sprtmap_payload_type(sdp_t *sdp_p, uint16_t level,
                                            uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_sprtmap_encname(sdp_t *sdp_p, uint16_t level,
                                               uint8_t cap_num, uint16_t inst_num);
extern uint32_t sdp_attr_get_sprtmap_clockrate(sdp_t *sdp_p, uint16_t level,
                                         uint8_t cap_num, uint16_t inst_num);
extern uint16_t sdp_attr_get_sprtmap_num_chan(sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_fmtp_payload_valid(sdp_t *sdp_p, uint16_t level,
                                  uint8_t cap_num, uint16_t *inst_num, uint16_t payload_type);
extern uint16_t sdp_attr_get_fmtp_payload_type(sdp_t *sdp_p, uint16_t level,
                                          uint8_t cap_num, uint16_t inst_num);
extern sdp_ne_res_e sdp_attr_fmtp_is_range_set(sdp_t *sdp_p, uint16_t level,
                           uint8_t cap_num, uint16_t inst_num, uint8_t low_val, uint8_t high_val);
extern tinybool sdp_attr_fmtp_valid(sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
                                    uint16_t inst_num, uint16_t appl_maxval, uint32_t* evt_array);
extern sdp_result_e sdp_attr_set_fmtp_payload_type(sdp_t *sdp_p, uint16_t level,
                                                   uint8_t cap_num, uint16_t inst_num,
                                                   uint16_t payload_num);
extern sdp_result_e sdp_attr_get_fmtp_range(sdp_t *sdp_p, uint16_t level,
                           uint8_t cap_num, uint16_t inst_num, uint32_t *bmap);
extern sdp_result_e sdp_attr_clear_fmtp_range(sdp_t *sdp_p, uint16_t level,
                           uint8_t cap_num, uint16_t inst_num, uint8_t low_val, uint8_t high_val);
extern sdp_ne_res_e sdp_attr_compare_fmtp_ranges(sdp_t *src_sdp_ptr,
                           sdp_t *dst_sdp_ptr, uint16_t src_level, uint16_t dst_level,
                           uint8_t src_cap_num, uint8_t dst_cap_num, uint16_t src_inst_num,
                           uint16_t dst_inst_num);
extern sdp_result_e sdp_attr_copy_fmtp_ranges(sdp_t *src_sdp_ptr,
                           sdp_t *dst_sdp_ptr, uint16_t src_level, uint16_t dst_level,
                           uint8_t src_cap_num, uint8_t dst_cap_num, uint16_t src_inst_num,
                           uint16_t dst_inst_num);
extern uint32_t sdp_attr_get_fmtp_mode_for_payload_type (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint32_t payload_type);

extern sdp_result_e sdp_attr_set_fmtp_max_fs (sdp_t *sdp_p,
                                              uint16_t level,
                                              uint8_t cap_num,
                                              uint16_t inst_num,
                                              uint32_t max_fs);

extern sdp_result_e sdp_attr_set_fmtp_max_fr (sdp_t *sdp_p,
                                              uint16_t level,
                                              uint8_t cap_num,
                                              uint16_t inst_num,
                                              uint32_t max_fr);

/* get routines */
extern int32_t sdp_attr_get_fmtp_bitrate_type (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num);

extern int32_t sdp_attr_get_fmtp_cif (sdp_t *sdp_p, uint16_t level,
                                    uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_qcif (sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_sqcif (sdp_t *sdp_p, uint16_t level,
                                      uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_cif4 (sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_cif16 (sdp_t *sdp_p, uint16_t level,
                                      uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_maxbr (sdp_t *sdp_p, uint16_t level,
                                      uint8_t cap_num, uint16_t inst_num);
extern sdp_result_e sdp_attr_get_fmtp_max_average_bitrate (sdp_t *sdp_p, uint16_t level,
                                                           uint8_t cap_num, uint16_t inst_num, uint32_t* val);
extern sdp_result_e sdp_attr_get_fmtp_usedtx (sdp_t *sdp_p, uint16_t level,
                                              uint8_t cap_num, uint16_t inst_num, tinybool* val);
extern sdp_result_e sdp_attr_get_fmtp_stereo (sdp_t *sdp_p, uint16_t level,
                                              uint8_t cap_num, uint16_t inst_num, tinybool* val);
extern sdp_result_e sdp_attr_get_fmtp_useinbandfec (sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num, uint16_t inst_num, tinybool* val);
extern char* sdp_attr_get_fmtp_maxcodedaudiobandwidth (sdp_t *sdp_p, uint16_t level,
                                                             uint8_t cap_num, uint16_t inst_num);
extern sdp_result_e sdp_attr_get_fmtp_cbr (sdp_t *sdp_p, uint16_t level,
                             uint8_t cap_num, uint16_t inst_num, tinybool* val);
extern int32_t sdp_attr_get_fmtp_custom_x (sdp_t *sdp_p, uint16_t level,
                                         uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_custom_y (sdp_t *sdp_p, uint16_t level,
                                         uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_custom_mpi (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_par_width (sdp_t *sdp_p, uint16_t level,
                                          uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_par_height (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_bpp (sdp_t *sdp_p, uint16_t level,
                                    uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_hrd (sdp_t *sdp_p, uint16_t level,
                                    uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_profile (sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_level (sdp_t *sdp_p, uint16_t level,
                                      uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_interlace (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_annex_d (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_annex_f (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_annex_i (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_annex_j (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern tinybool sdp_attr_get_fmtp_annex_t (sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_annex_k_val (sdp_t *sdp_p, uint16_t level,
                                            uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_annex_n_val (sdp_t *sdp_p, uint16_t level,
                                            uint8_t cap_num, uint16_t inst_num);

extern int32_t sdp_attr_get_fmtp_annex_p_picture_resize (sdp_t *sdp_p, uint16_t level,
                                                       uint8_t cap_num, uint16_t inst_num);
extern int32_t sdp_attr_get_fmtp_annex_p_warp (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num);

/* sctpmap params */
extern uint16_t sdp_attr_get_sctpmap_port(sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);
extern sdp_result_e sdp_attr_get_sctpmap_protocol (sdp_t *sdp_p, uint16_t level,
                             uint8_t cap_num, uint16_t inst_num, char* protocol);
extern sdp_result_e sdp_attr_get_sctpmap_streams (sdp_t *sdp_p, uint16_t level,
                             uint8_t cap_num, uint16_t inst_num, uint32_t* val);

extern const char *sdp_attr_get_msid_identifier(sdp_t *sdp_p, uint16_t level,
                                                uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_msid_appdata(sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num);

/* H.264 codec specific params */

extern const char *sdp_attr_get_fmtp_profile_id(sdp_t *sdp_p, uint16_t level,
                                                uint8_t cap_num, uint16_t inst_num);
extern const char *sdp_attr_get_fmtp_param_sets(sdp_t *sdp_p, uint16_t level,
                                                uint8_t cap_num, uint16_t inst_num);
extern sdp_result_e sdp_attr_get_fmtp_pack_mode (sdp_t *sdp_p, uint16_t level,
                                          uint8_t cap_num, uint16_t inst_num, uint16_t *val);

extern sdp_result_e sdp_attr_get_fmtp_level_asymmetry_allowed (sdp_t *sdp_p, uint16_t level,
                                          uint8_t cap_num, uint16_t inst_num, uint16_t *val);

extern sdp_result_e sdp_attr_get_fmtp_interleaving_depth (sdp_t *sdp_p, uint16_t level,
                                                   uint8_t cap_num, uint16_t inst_num,
                                                   uint16_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_don_diff (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num,
                                             uint32_t *val);

/* The following four H.264 parameters that require special handling as
 * the values range from 0 - 4294967295
 */
extern sdp_result_e sdp_attr_get_fmtp_deint_buf_req (sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num, uint16_t inst_num,
                                                    uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_deint_buf_cap (sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num, uint16_t inst_num,
                                                    uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_init_buf_time (sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num, uint16_t inst_num,
                                                    uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_rcmd_nalu_size (sdp_t *sdp_p,
                                                    uint16_t level, uint8_t cap_num,
                                                    uint16_t inst_num, uint32_t *val);


extern sdp_result_e sdp_attr_get_fmtp_max_mbps (sdp_t *sdp_p, uint16_t level,
                                         uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_fs (sdp_t *sdp_p, uint16_t level,
                                       uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_fr (sdp_t *sdp_p, uint16_t level,
                                       uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_cpb (sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_dpb (sdp_t *sdp_p, uint16_t level,
                                        uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern sdp_result_e sdp_attr_get_fmtp_max_br (sdp_t *sdp_p, uint16_t level,
                                       uint8_t cap_num, uint16_t inst_num, uint32_t *val);
extern tinybool sdp_attr_fmtp_is_redundant_pic_cap (sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num,
                                                    uint16_t inst_num);
extern tinybool sdp_attr_fmtp_is_parameter_add (sdp_t *sdp_p, uint16_t level,
                                                uint8_t cap_num,
                                                uint16_t inst_num);
extern tinybool sdp_attr_fmtp_is_annexa_set (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num,
                                             uint16_t inst_num);

extern tinybool sdp_attr_fmtp_is_annexb_set (sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num,
                                             uint16_t inst_num);

extern sdp_fmtp_format_type_e  sdp_attr_fmtp_get_fmtp_format (sdp_t *sdp_p, uint16_t level, uint8_t cap_num,
                                                              uint16_t inst_num);

extern uint16_t sdp_attr_get_pccodec_num_payload_types(sdp_t *sdp_p, uint16_t level,
                                                  uint8_t cap_num, uint16_t inst_num);
extern uint16_t sdp_attr_get_pccodec_payload_type(sdp_t *sdp_p, uint16_t level,
                                   uint8_t cap_num, uint16_t inst_num, uint16_t payload_num);
extern sdp_result_e sdp_attr_add_pccodec_payload_type(sdp_t *sdp_p,
                                               uint16_t level, uint8_t cap_num,
                                               uint16_t inst_num, uint16_t payload_type);
extern uint16_t sdp_attr_get_xcap_first_cap_num(sdp_t *sdp_p, uint16_t level,
                                            uint16_t inst_num);
extern sdp_media_e sdp_attr_get_xcap_media_type(sdp_t *sdp_p, uint16_t level,
                                                uint16_t inst_num);
extern sdp_transport_e sdp_attr_get_xcap_transport_type(sdp_t *sdp_p,
                                         uint16_t level, uint16_t inst_num);
extern uint16_t sdp_attr_get_xcap_num_payload_types(sdp_t *sdp_p, uint16_t level,
                                               uint16_t inst_num);
extern uint16_t sdp_attr_get_xcap_payload_type(sdp_t *sdp_p, uint16_t level,
                                          uint16_t inst_num, uint16_t payload_num,
                                          sdp_payload_ind_e *indicator);
extern sdp_result_e sdp_attr_add_xcap_payload_type(sdp_t *sdp_p, uint16_t level,
                                      uint16_t inst_num, uint16_t payload_type,
                                      sdp_payload_ind_e indicator);
extern uint16_t sdp_attr_get_cdsc_first_cap_num(sdp_t *sdp_p, uint16_t level,
                                            uint16_t inst_num);
extern sdp_media_e sdp_attr_get_cdsc_media_type(sdp_t *sdp_p, uint16_t level,
                                                uint16_t inst_num);
extern sdp_transport_e sdp_attr_get_cdsc_transport_type(sdp_t *sdp_p,
                                         uint16_t level, uint16_t inst_num);
extern uint16_t sdp_attr_get_cdsc_num_payload_types(sdp_t *sdp_p, uint16_t level,
                                               uint16_t inst_num);
extern uint16_t sdp_attr_get_cdsc_payload_type(sdp_t *sdp_p, uint16_t level,
                                          uint16_t inst_num, uint16_t payload_num,
                                          sdp_payload_ind_e *indicator);
extern sdp_result_e sdp_attr_add_cdsc_payload_type(sdp_t *sdp_p, uint16_t level,
                                      uint16_t inst_num, uint16_t payload_type,
                                      sdp_payload_ind_e indicator);
extern tinybool sdp_media_dynamic_payload_valid (sdp_t *sdp_p, uint16_t payload_type,
                                                 uint16_t m_line);

extern tinybool sdp_attr_get_rtr_confirm (sdp_t *, uint16_t, uint8_t, uint16_t);

extern tinybool sdp_attr_get_silencesupp_enabled(sdp_t *sdp_p, uint16_t level,
                                                 uint8_t cap_num, uint16_t inst_num);
extern uint16_t sdp_attr_get_silencesupp_timer(sdp_t *sdp_p, uint16_t level,
                                          uint8_t cap_num, uint16_t inst_num,
                                          tinybool *null_ind);
extern sdp_silencesupp_pref_e sdp_attr_get_silencesupp_pref(sdp_t *sdp_p,
                                                            uint16_t level,
                                                            uint8_t cap_num,
                                                            uint16_t inst_num);
extern sdp_silencesupp_siduse_e sdp_attr_get_silencesupp_siduse(sdp_t *sdp_p,
                                                                uint16_t level,
                                                                uint8_t cap_num,
                                                                uint16_t inst_num);
extern uint8_t sdp_attr_get_silencesupp_fxnslevel(sdp_t *sdp_p, uint16_t level,
                                             uint8_t cap_num, uint16_t inst_num,
                                             tinybool *null_ind);
extern sdp_mediadir_role_e sdp_attr_get_comediadir_role(sdp_t *sdp_p,
                                                        uint16_t level, uint8_t cap_num,
                                                        uint16_t inst_num);

extern uint16_t sdp_attr_get_mptime_num_intervals(
    sdp_t *sdp_p, uint16_t level, uint8_t cap_num, uint16_t inst_num);
extern uint16_t sdp_attr_get_mptime_interval(
    sdp_t *sdp_p, uint16_t level, uint8_t cap_num, uint16_t inst_num, uint16_t interval_num);
extern sdp_result_e sdp_attr_add_mptime_interval(
    sdp_t *sdp_p, uint16_t level, uint8_t cap_num, uint16_t inst_num, uint16_t interval);


extern sdp_result_e sdp_copy_all_bw_lines(sdp_t *src_sdp_ptr, sdp_t *dst_sdp_ptr,
                                          uint16_t src_level, uint16_t dst_level);
extern sdp_bw_modifier_e sdp_get_bw_modifier(sdp_t *sdp_p, uint16_t level,
                                             uint16_t inst_num);
extern const char *sdp_get_bw_modifier_name(sdp_bw_modifier_e bw_modifier);
extern int32_t sdp_get_bw_value(sdp_t *sdp_p, uint16_t level, uint16_t inst_num);
extern int32_t sdp_get_num_bw_lines (sdp_t *sdp_p, uint16_t level);

extern sdp_result_e sdp_add_new_bw_line(sdp_t *sdp_p, uint16_t level,
                                         sdp_bw_modifier_e bw_modifier, uint16_t *inst_num);

extern sdp_group_attr_e sdp_get_group_attr(sdp_t *sdp_p, uint16_t level,
                                           uint8_t cap_num, uint16_t inst_num);

extern const char* sdp_attr_get_x_sidout (sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);


extern const char* sdp_attr_get_x_sidin (sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);

extern const char* sdp_attr_get_x_confid (sdp_t *sdp_p, uint16_t level,
                                     uint8_t cap_num, uint16_t inst_num);

extern uint16_t sdp_get_group_num_id(sdp_t *sdp_p, uint16_t level,
                                uint8_t cap_num, uint16_t inst_num);

extern const char* sdp_get_group_id(sdp_t *sdp_p, uint16_t level,
                              uint8_t cap_num, uint16_t inst_num, uint16_t id_num);

extern int32_t sdp_get_mid_value(sdp_t *sdp_p, uint16_t level);
extern sdp_result_e sdp_include_new_filter_src_addr(sdp_t *sdp_p, uint16_t level,
                                                    uint8_t cap_num, uint16_t inst_num,
                                                    const char *src_addr);
extern sdp_src_filter_mode_e sdp_get_source_filter_mode(sdp_t *sdp_p,
                                                  uint16_t level, uint8_t cap_num,
                                                  uint16_t inst_num);
extern sdp_result_e sdp_get_filter_destination_attributes(sdp_t *sdp_p,
                                                  uint16_t level, uint8_t cap_num,
                                                  uint16_t inst_num,
                                                  sdp_nettype_e *nettype,
                                                  sdp_addrtype_e *addrtype,
                                                  char *dest_addr);
extern int32_t sdp_get_filter_source_address_count(sdp_t *sdp_p, uint16_t level,
                                                 uint8_t cap_num, uint16_t inst_num);
extern sdp_result_e sdp_get_filter_source_address (sdp_t *sdp_p, uint16_t level,
                                                   uint8_t cap_num, uint16_t inst_num,
                                                   uint16_t src_addr_id,
                                                   char *src_addr);

extern sdp_rtcp_unicast_mode_e sdp_get_rtcp_unicast_mode(sdp_t *sdp_p,
                                              uint16_t level, uint8_t cap_num,
                                              uint16_t inst_num);

void sdp_crypto_debug(char *buffer, ulong length_bytes);
char * sdp_debug_msg_filter(char *buffer, ulong length_bytes);

extern int32_t
sdp_attr_get_sdescriptions_tag(sdp_t *sdp_p,
                               uint16_t level,
                               uint8_t cap_num,
                               uint16_t inst_num);

extern sdp_srtp_crypto_suite_t
sdp_attr_get_sdescriptions_crypto_suite(sdp_t *sdp_p,
                                        uint16_t level,
                                        uint8_t cap_num,
                                        uint16_t inst_num);

extern const char*
sdp_attr_get_sdescriptions_key(sdp_t *sdp_p,
                               uint16_t level,
                               uint8_t cap_num,
                               uint16_t inst_num);

extern const char*
sdp_attr_get_sdescriptions_salt(sdp_t *sdp_p,
                                uint16_t level,
                                uint8_t cap_num,
                                uint16_t inst_num);

extern const char*
sdp_attr_get_sdescriptions_lifetime(sdp_t *sdp_p,
                                    uint16_t level,
                                    uint8_t cap_num,
                                    uint16_t inst_num);

extern sdp_result_e
sdp_attr_get_sdescriptions_mki(sdp_t *sdp_p,
                               uint16_t level,
                               uint8_t cap_num,
                               uint16_t inst_num,
                               const char **mki_value,
                               uint16_t *mki_length);

extern const char*
sdp_attr_get_sdescriptions_session_params(sdp_t *sdp_p,
                                          uint16_t level,
                                          uint8_t cap_num,
                                          uint16_t inst_num);

extern unsigned char
sdp_attr_get_sdescriptions_key_size(sdp_t *sdp_p,
                                    uint16_t level,
                                    uint8_t cap_num,
                                    uint16_t inst_num);

extern unsigned char
sdp_attr_get_sdescriptions_salt_size(sdp_t *sdp_p,
                                     uint16_t level,
                                     uint8_t cap_num,
                                     uint16_t inst_num);

extern unsigned long
sdp_attr_get_srtp_crypto_selection_flags(sdp_t *sdp_p,
                                         uint16_t level,
                                         uint8_t cap_num,
                                         uint16_t inst_num);

sdp_result_e
sdp_attr_get_ice_attribute (sdp_t *sdp_p, uint16_t level,
                           uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
                           char **out);

sdp_result_e
sdp_attr_get_rtcp_mux_attribute (sdp_t *sdp_p, uint16_t level,
                                  uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
                                  tinybool *rtcp_mux);

sdp_result_e
sdp_attr_get_setup_attribute (sdp_t *sdp_p, uint16_t level,
    uint8_t cap_num, uint16_t inst_num, sdp_setup_type_e *setup_type);

sdp_result_e
sdp_attr_get_connection_attribute (sdp_t *sdp_p, uint16_t level,
    uint8_t cap_num, uint16_t inst_num, sdp_connection_type_e *connection_type);

sdp_result_e
sdp_attr_get_dtls_fingerprint_attribute (sdp_t *sdp_p, uint16_t level,
                                  uint8_t cap_num, sdp_attr_e sdp_attr, uint16_t inst_num,
                                  char **out);

sdp_rtcp_fb_ack_type_e
sdp_attr_get_rtcp_fb_ack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst);

sdp_rtcp_fb_nack_type_e
sdp_attr_get_rtcp_fb_nack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst);

uint32_t
sdp_attr_get_rtcp_fb_trr_int(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
                             uint16_t inst);

tinybool
sdp_attr_get_rtcp_fb_remb_enabled(sdp_t *sdp_p, uint16_t level,
                                  uint16_t payload_type);

tinybool
sdp_attr_get_rtcp_fb_transport_cc_enabled(sdp_t *sdp_p, uint16_t level,
                                          uint16_t payload_type);

sdp_rtcp_fb_ccm_type_e
sdp_attr_get_rtcp_fb_ccm(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst);

sdp_result_e
sdp_attr_set_rtcp_fb_ack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
                         sdp_rtcp_fb_ack_type_e type);

sdp_result_e
sdp_attr_set_rtcp_fb_nack(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
                          sdp_rtcp_fb_nack_type_e);

sdp_result_e
sdp_attr_set_rtcp_fb_trr_int(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
                             uint16_t inst, uint32_t interval);

sdp_result_e
sdp_attr_set_rtcp_fb_remb(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
                          uint16_t inst);
sdp_result_e
sdp_attr_set_rtcp_fb_transport_cc(sdp_t *sdp_p, uint16_t level, uint16_t payload_type,
                                  uint16_t inst);

sdp_result_e
sdp_attr_set_rtcp_fb_ccm(sdp_t *sdp_p, uint16_t level, uint16_t payload_type, uint16_t inst,
                         sdp_rtcp_fb_ccm_type_e);
const char *
sdp_attr_get_extmap_uri(sdp_t *sdp_p, uint16_t level, uint16_t inst);

uint16_t
sdp_attr_get_extmap_id(sdp_t *sdp_p, uint16_t level, uint16_t inst);

sdp_result_e
sdp_attr_set_extmap(sdp_t *sdp_p, uint16_t level, uint16_t id, const char* uri, uint16_t inst);

#endif /* _SDP_H_ */