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* RTP demuxer definitions
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* Copyright (c) 2002 Fabrice Bellard
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* Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com>
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef AVFORMAT_RTPDEC_H
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#define AVFORMAT_RTPDEC_H
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#include "libavcodec/avcodec.h"
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/** Structure listing useful vars to parse RTP packet payload*/
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typedef struct rtp_payload_data
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/** mpeg 4 AU headers */
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int au_headers_length_bytes;
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typedef struct PayloadContext PayloadContext;
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typedef struct RTPDynamicProtocolHandler_s RTPDynamicProtocolHandler;
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#define RTP_MIN_PACKET_LENGTH 12
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#define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
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typedef struct RTPDemuxContext RTPDemuxContext;
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RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, RTPPayloadData *rtp_payload_data);
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void rtp_parse_set_dynamic_protocol(RTPDemuxContext *s, PayloadContext *ctx,
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RTPDynamicProtocolHandler *handler);
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int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
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const uint8_t *buf, int len);
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void rtp_parse_close(RTPDemuxContext *s);
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int rtp_get_local_port(URLContext *h);
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int rtp_set_remote_url(URLContext *h, const char *uri);
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void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd);
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* some rtp servers assume client is dead if they don't hear from them...
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* so we send a Receiver Report to the provided ByteIO context
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* (we don't have access to the rtcp handle from here)
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int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count);
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// these statistics are used for rtcp receiver reports...
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uint16_t max_seq; ///< highest sequence number seen
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uint32_t cycles; ///< shifted count of sequence number cycles
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uint32_t base_seq; ///< base sequence number
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uint32_t bad_seq; ///< last bad sequence number + 1
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int probation; ///< sequence packets till source is valid
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int received; ///< packets received
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int expected_prior; ///< packets expected in last interval
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int received_prior; ///< packets received in last interval
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uint32_t transit; ///< relative transit time for previous packet
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uint32_t jitter; ///< estimated jitter.
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#define RTP_FLAG_KEY 0x1 ///< RTP packet contains a keyframe
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#define RTP_FLAG_MARKER 0x2 ///< RTP marker bit was set for this packet
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* Packet parsing for "private" payloads in the RTP specs.
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* @param ctx RTSP demuxer context
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* @param s stream context
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* @param st stream that this packet belongs to
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* @param pkt packet in which to write the parsed data
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* @param timestamp pointer in which to write the timestamp of this RTP packet
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* @param buf pointer to raw RTP packet data
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* @param len length of buf
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* @param flags flags from the RTP packet header (RTP_FLAG_*)
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typedef int (*DynamicPayloadPacketHandlerProc) (AVFormatContext *ctx,
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struct RTPDynamicProtocolHandler_s {
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// fields from AVRtpDynamicPayloadType_s
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const char enc_name[50]; /* XXX: still why 50 ? ;-) */
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enum CodecType codec_type;
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enum CodecID codec_id;
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int (*parse_sdp_a_line) (AVFormatContext *s,
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PayloadContext *priv_data,
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const char *line); ///< Parse the a= line from the sdp field
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PayloadContext *(*open) (); ///< allocate any data needed by the rtp parsing for this dynamic data.
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void (*close)(PayloadContext *protocol_data); ///< free any data needed by the rtp parsing for this dynamic data.
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DynamicPayloadPacketHandlerProc parse_packet; ///< parse handler for this dynamic packet.
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struct RTPDynamicProtocolHandler_s *next;
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// moved out of rtp.c, because the h264 decoder needs to know about this structure..
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struct RTPDemuxContext {
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uint32_t base_timestamp;
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uint32_t cur_timestamp;
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int max_payload_size;
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struct MpegTSContext *ts; /* only used for MP2T payloads */
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/* used to send back RTCP RR */
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RTPStatistics statistics; ///< Statistics for this stream (used by RTCP receiver reports)
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/* rtcp sender statistics receive */
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int64_t last_rtcp_ntp_time; // TODO: move into statistics
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int64_t first_rtcp_ntp_time; // TODO: move into statistics
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uint32_t last_rtcp_timestamp; // TODO: move into statistics
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/* rtcp sender statistics */
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unsigned int packet_count; // TODO: move into statistics (outgoing)
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unsigned int octet_count; // TODO: move into statistics (outgoing)
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unsigned int last_octet_count; // TODO: move into statistics (outgoing)
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/* buffer for output */
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uint8_t buf[RTP_MAX_PACKET_LENGTH];
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/* special infos for au headers parsing */
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RTPPayloadData *rtp_payload_data; // TODO: Move into dynamic payload handlers
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/* dynamic payload stuff */
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DynamicPayloadPacketHandlerProc parse_packet; ///< This is also copied from the dynamic protocol handler structure
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PayloadContext *dynamic_protocol_context; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me.
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int max_frames_per_packet;
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extern RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler;
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void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler);
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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.
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void av_register_rtp_dynamic_payload_handlers(void);
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#endif /* AVFORMAT_RTPDEC_H */
added
removed
libavformat/rtpdec.h
