move a couple of macros and structs to mpegaudio.h
[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.
23#ifndef RTP_INTERNAL_H
24#define RTP_INTERNAL_H
25
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26// these statistics are used for rtcp receiver reports...
27typedef struct {
28 uint16_t max_seq; ///< highest sequence number seen
29 uint32_t cycles; ///< shifted count of sequence number cycles
30 uint32_t base_seq; ///< base sequence number
31 uint32_t bad_seq; ///< last bad sequence number + 1
32 int probation; ///< sequence packets till source is valid
33 int received; ///< packets received
34 int expected_prior; ///< packets expected in last interval
35 int received_prior; ///< packets received in last interval
36 uint32_t transit; ///< relative transit time for previous packet
37 uint32_t jitter; ///< estimated jitter.
38} RTPStatistics;
39
40
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41typedef int (*DynamicPayloadPacketHandlerProc) (struct RTPDemuxContext * s,
42 AVPacket * pkt,
d0deedcb 43 uint32_t *timestamp,
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44 const uint8_t * buf,
45 int len);
46
47typedef struct RTPDynamicProtocolHandler_s {
48 // fields from AVRtpDynamicPayloadType_s
49 const char enc_name[50]; /* XXX: still why 50 ? ;-) */
50 enum CodecType codec_type;
51 enum CodecID codec_id;
52
53 // may be null
54 int (*parse_sdp_a_line) (AVStream * stream,
55 void *protocol_data,
56 const char *line); ///< Parse the a= line from the sdp field
57 void *(*open) (); ///< allocate any data needed by the rtp parsing for this dynamic data.
58 void (*close)(void *protocol_data); ///< free any data needed by the rtp parsing for this dynamic data.
59 DynamicPayloadPacketHandlerProc parse_packet; ///< parse handler for this dynamic packet.
60
61 struct RTPDynamicProtocolHandler_s *next;
62} RTPDynamicProtocolHandler;
63
64// moved out of rtp.c, because the h264 decoder needs to know about this structure..
65struct RTPDemuxContext {
66 AVFormatContext *ic;
67 AVStream *st;
68 int payload_type;
69 uint32_t ssrc;
70 uint16_t seq;
71 uint32_t timestamp;
72 uint32_t base_timestamp;
73 uint32_t cur_timestamp;
74 int max_payload_size;
75 struct MpegTSContext *ts; /* only used for MP2T payloads */
76 int read_buf_index;
77 int read_buf_size;
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78 /* used to send back RTCP RR */
79 URLContext *rtp_ctx;
80 char hostname[256];
4934884a 81
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82 RTPStatistics statistics; ///< Statistics for this stream (used by RTCP receiver reports)
83
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84 /* rtcp sender statistics receive */
85 int64_t last_rtcp_ntp_time; // TODO: move into statistics
86 int64_t first_rtcp_ntp_time; // TODO: move into statistics
87 uint32_t last_rtcp_timestamp; // TODO: move into statistics
88
89 /* rtcp sender statistics */
90 unsigned int packet_count; // TODO: move into statistics (outgoing)
91 unsigned int octet_count; // TODO: move into statistics (outgoing)
92 unsigned int last_octet_count; // TODO: move into statistics (outgoing)
93 int first_packet;
94 /* buffer for output */
95 uint8_t buf[RTP_MAX_PACKET_LENGTH];
96 uint8_t *buf_ptr;
97
98 /* special infos for au headers parsing */
99 rtp_payload_data_t *rtp_payload_data; // TODO: Move into dynamic payload handlers
100
101 /* dynamic payload stuff */
102 DynamicPayloadPacketHandlerProc parse_packet; ///< This is also copied from the dynamic protocol handler structure
103 void *dynamic_protocol_context; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me.
104};
105
106extern RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler;
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107
108int 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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109#endif /* RTP_INTERNAL_H */
110