/* * RTP definitions * Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ // this is a bit of a misnomer, because rtp & rtsp internal structures and prototypes are in here. #ifndef AVFORMAT_RTP_INTERNAL_H #define AVFORMAT_RTP_INTERNAL_H #include <stdint.h> #include "libavcodec/avcodec.h" #include "rtp.h" // these statistics are used for rtcp receiver reports... typedef struct { uint16_t max_seq; ///< highest sequence number seen uint32_t cycles; ///< shifted count of sequence number cycles uint32_t base_seq; ///< base sequence number uint32_t bad_seq; ///< last bad sequence number + 1 int probation; ///< sequence packets till source is valid int received; ///< packets received int expected_prior; ///< packets expected in last interval int received_prior; ///< packets received in last interval uint32_t transit; ///< relative transit time for previous packet uint32_t jitter; ///< estimated jitter. } RTPStatistics; /** * Packet parsing for "private" payloads in the RTP specs. * * @param s stream context * @param pkt packet in which to write the parsed data * @param timestamp pointer in which to write the timestamp of this RTP packet * @param buf pointer to raw RTP packet data * @param len length of buf * @param flags flags from the RTP packet header (PKT_FLAG_*) */ typedef int (*DynamicPayloadPacketHandlerProc) (struct RTPDemuxContext * s, AVPacket * pkt, uint32_t *timestamp, const uint8_t * buf, int len, int flags); typedef struct RTPDynamicProtocolHandler_s { // fields from AVRtpDynamicPayloadType_s const char enc_name[50]; /* XXX: still why 50 ? ;-) */ enum CodecType codec_type; enum CodecID codec_id; // may be null int (*parse_sdp_a_line) (AVStream * stream, void *protocol_data, const char *line); ///< Parse the a= line from the sdp field void *(*open) (); ///< allocate any data needed by the rtp parsing for this dynamic data. void (*close)(void *protocol_data); ///< free any data needed by the rtp parsing for this dynamic data. DynamicPayloadPacketHandlerProc parse_packet; ///< parse handler for this dynamic packet. struct RTPDynamicProtocolHandler_s *next; } RTPDynamicProtocolHandler; // moved out of rtp.c, because the h264 decoder needs to know about this structure.. struct RTPDemuxContext { AVFormatContext *ic; AVStream *st; int payload_type; uint32_t ssrc; uint16_t seq; uint32_t timestamp; uint32_t base_timestamp; uint32_t cur_timestamp; int max_payload_size; struct MpegTSContext *ts; /* only used for MP2T payloads */ int read_buf_index; int read_buf_size; /* used to send back RTCP RR */ URLContext *rtp_ctx; char hostname[256]; RTPStatistics statistics; ///< Statistics for this stream (used by RTCP receiver reports) /* rtcp sender statistics receive */ int64_t last_rtcp_ntp_time; // TODO: move into statistics int64_t first_rtcp_ntp_time; // TODO: move into statistics uint32_t last_rtcp_timestamp; // TODO: move into statistics /* rtcp sender statistics */ unsigned int packet_count; // TODO: move into statistics (outgoing) unsigned int octet_count; // TODO: move into statistics (outgoing) unsigned int last_octet_count; // TODO: move into statistics (outgoing) int first_packet; /* buffer for output */ uint8_t buf[RTP_MAX_PACKET_LENGTH]; uint8_t *buf_ptr; /* special infos for au headers parsing */ rtp_payload_data_t *rtp_payload_data; // TODO: Move into dynamic payload handlers /* dynamic payload stuff */ DynamicPayloadPacketHandlerProc parse_packet; ///< This is also copied from the dynamic protocol handler structure void *dynamic_protocol_context; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me. int max_frames_per_packet; }; extern RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler; void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler); int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size); ///< from rtsp.c, but used by rtp dynamic protocol handlers. void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m); const char *ff_rtp_enc_name(int payload_type); enum CodecID ff_rtp_codec_id(const char *buf, enum CodecType codec_type); void av_register_rtp_dynamic_payload_handlers(void); #endif /* AVFORMAT_RTP_INTERNAL_H */