Remove the "AVRtpPayloadTypes[i].pt == i" assumption from RTP and RTSP
[libav.git] / libavformat / rtp_internal.h
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1/*
2 * RTP definitions
3 * Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com>
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
cbced386 10 * version 2.1 of the License, or (at your option) any later version.
4934884a 11 *
cbced386 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
550b2843 18 * License along with FFmpeg; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22// this is a bit of a misnomer, because rtp & rtsp internal structures and prototypes are in here.
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23#ifndef FFMPEG_RTP_INTERNAL_H
24#define FFMPEG_RTP_INTERNAL_H
4934884a 25
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26#include <stdint.h>
27#include "avcodec.h"
28#include "rtp.h"
29
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30// these statistics are used for rtcp receiver reports...
31typedef struct {
32 uint16_t max_seq; ///< highest sequence number seen
33 uint32_t cycles; ///< shifted count of sequence number cycles
34 uint32_t base_seq; ///< base sequence number
35 uint32_t bad_seq; ///< last bad sequence number + 1
36 int probation; ///< sequence packets till source is valid
37 int received; ///< packets received
38 int expected_prior; ///< packets expected in last interval
39 int received_prior; ///< packets received in last interval
40 uint32_t transit; ///< relative transit time for previous packet
41 uint32_t jitter; ///< estimated jitter.
42} RTPStatistics;
43
44
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45typedef int (*DynamicPayloadPacketHandlerProc) (struct RTPDemuxContext * s,
46 AVPacket * pkt,
d0deedcb 47 uint32_t *timestamp,
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48 const uint8_t * buf,
49 int len);
50
51typedef struct RTPDynamicProtocolHandler_s {
52 // fields from AVRtpDynamicPayloadType_s
53 const char enc_name[50]; /* XXX: still why 50 ? ;-) */
54 enum CodecType codec_type;
55 enum CodecID codec_id;
56
57 // may be null
58 int (*parse_sdp_a_line) (AVStream * stream,
59 void *protocol_data,
60 const char *line); ///< Parse the a= line from the sdp field
61 void *(*open) (); ///< allocate any data needed by the rtp parsing for this dynamic data.
62 void (*close)(void *protocol_data); ///< free any data needed by the rtp parsing for this dynamic data.
63 DynamicPayloadPacketHandlerProc parse_packet; ///< parse handler for this dynamic packet.
64
65 struct RTPDynamicProtocolHandler_s *next;
66} RTPDynamicProtocolHandler;
67
68// moved out of rtp.c, because the h264 decoder needs to know about this structure..
69struct RTPDemuxContext {
70 AVFormatContext *ic;
71 AVStream *st;
72 int payload_type;
73 uint32_t ssrc;
74 uint16_t seq;
75 uint32_t timestamp;
76 uint32_t base_timestamp;
77 uint32_t cur_timestamp;
78 int max_payload_size;
79 struct MpegTSContext *ts; /* only used for MP2T payloads */
80 int read_buf_index;
81 int read_buf_size;
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82 /* used to send back RTCP RR */
83 URLContext *rtp_ctx;
84 char hostname[256];
4934884a 85
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86 RTPStatistics statistics; ///< Statistics for this stream (used by RTCP receiver reports)
87
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88 /* rtcp sender statistics receive */
89 int64_t last_rtcp_ntp_time; // TODO: move into statistics
90 int64_t first_rtcp_ntp_time; // TODO: move into statistics
91 uint32_t last_rtcp_timestamp; // TODO: move into statistics
92
93 /* rtcp sender statistics */
94 unsigned int packet_count; // TODO: move into statistics (outgoing)
95 unsigned int octet_count; // TODO: move into statistics (outgoing)
96 unsigned int last_octet_count; // TODO: move into statistics (outgoing)
97 int first_packet;
98 /* buffer for output */
99 uint8_t buf[RTP_MAX_PACKET_LENGTH];
100 uint8_t *buf_ptr;
101
102 /* special infos for au headers parsing */
103 rtp_payload_data_t *rtp_payload_data; // TODO: Move into dynamic payload handlers
104
105 /* dynamic payload stuff */
106 DynamicPayloadPacketHandlerProc parse_packet; ///< This is also copied from the dynamic protocol handler structure
107 void *dynamic_protocol_context; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me.
e0d21bfe 108 int max_frames_per_packet;
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109};
110
111extern RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler;
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112
113int 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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114
115void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);
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116const char *ff_rtp_enc_name(int payload_type);
117enum CodecID ff_rtp_codec_id(const char *buf, enum CodecType codec_type);
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118
119void av_register_rtp_dynamic_payload_handlers(void);
120
5b21bdab 121#endif /* FFMPEG_RTP_INTERNAL_H */
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