FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/rtp.c
Date: 2026-04-21 18:58:04
Exec Total Coverage
Lines: 16 50 32.0%
Functions: 1 4 25.0%
Branches: 17 66 25.8%
Line Branch Exec Source
1 /*
2 * RTP input/output format
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
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
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "libavutil/opt.h"
24 #include "avformat.h"
25
26 #include "rtp.h"
27
28 /* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */
29 /* payload types >= 96 are dynamic;
30 * payload types between 72 and 76 are reserved for RTCP conflict avoidance;
31 * all the other payload types not present in the table are unassigned or
32 * reserved
33 */
34 static const struct {
35 int pt;
36 const char enc_name[6];
37 enum AVMediaType codec_type;
38 enum AVCodecID codec_id;
39 int clock_rate;
40 int audio_channels;
41 } rtp_payload_types[] = {
42 {0, "PCMU", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_MULAW, 8000, 1},
43 {3, "GSM", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
44 {4, "G723", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_G723_1, 8000, 1},
45 {5, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
46 {6, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 16000, 1},
47 {7, "LPC", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
48 {8, "PCMA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_ALAW, 8000, 1},
49 {9, "G722", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_ADPCM_G722, 8000, 1},
50 {10, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 2},
51 {11, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 1},
52 {12, "QCELP", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_QCELP, 8000, 1},
53 {13, "CN", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
54 {14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP2, -1, -1},
55 {14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3, -1, -1},
56 {15, "G728", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_G728, 8000, 1},
57 {16, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 11025, 1},
58 {17, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 22050, 1},
59 {18, "G729", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
60 {25, "CelB", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1},
61 {26, "JPEG", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MJPEG, 90000, -1},
62 {28, "nv", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1},
63 {31, "H261", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H261, 90000, -1},
64 {32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG1VIDEO, 90000, -1},
65 {32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO, 90000, -1},
66 {33, "MP2T", AVMEDIA_TYPE_DATA, AV_CODEC_ID_MPEG2TS, 90000, -1},
67 {34, "H263", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H263, 90000, -1},
68 {-1, "", AVMEDIA_TYPE_UNKNOWN, AV_CODEC_ID_NONE, -1, -1}
69 };
70
71 ✗ int ff_rtp_get_codec_info(AVCodecParameters *par, int payload_type)
72 {
73 ✗ int i = 0;
74
75 ✗ for (i = 0; rtp_payload_types[i].pt >= 0; i++)
76 ✗ if (rtp_payload_types[i].pt == payload_type) {
77 ✗ if (rtp_payload_types[i].codec_id != AV_CODEC_ID_NONE) {
78 ✗ par->codec_type = rtp_payload_types[i].codec_type;
79 ✗ par->codec_id = rtp_payload_types[i].codec_id;
80 ✗ if (rtp_payload_types[i].audio_channels > 0) {
81 ✗ av_channel_layout_uninit(&par->ch_layout);
82 ✗ par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
83 ✗ par->ch_layout.nb_channels = rtp_payload_types[i].audio_channels;
84 }
85 ✗ if (rtp_payload_types[i].clock_rate > 0)
86 ✗ par->sample_rate = rtp_payload_types[i].clock_rate;
87 ✗ return 0;
88 }
89 }
90 ✗ return -1;
91 }
92
93 4 int ff_rtp_get_payload_type(const AVFormatContext *fmt,
94 const AVCodecParameters *par, int idx)
95 {
96 int i;
97
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 4 const AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL;
98
99 /* Was the payload type already specified for the RTP muxer? */
100
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 4 if (ofmt && ofmt->priv_class && fmt->priv_data) {
101 int64_t payload_type;
102
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 4 if (av_opt_get_int(fmt->priv_data, "payload_type", 0, &payload_type) >= 0 &&
103
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 2 payload_type >= 0)
104 2 return (int)payload_type;
105 }
106
107 /* static payload type */
108
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 54 for (i = 0; rtp_payload_types[i].pt >= 0; ++i)
109
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 52 if (rtp_payload_types[i].codec_id == par->codec_id) {
110
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 1 if (par->codec_id == AV_CODEC_ID_H263 && (!fmt || !fmt->oformat ||
111 ✗ !fmt->oformat->priv_class || !fmt->priv_data ||
112 ✗ !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190")))
113 ✗ continue;
114 /* G722 has 8000 as nominal rate even if the sample rate is 16000,
115 * see section 4.5.2 in RFC 3551. */
116
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 1 if (par->codec_id == AV_CODEC_ID_ADPCM_G722 &&
117 ✗ par->sample_rate == 16000 && par->ch_layout.nb_channels == 1)
118 ✗ return rtp_payload_types[i].pt;
119
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 1 if (par->codec_type == AVMEDIA_TYPE_AUDIO &&
120
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 1 ((rtp_payload_types[i].clock_rate > 0 &&
121
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 1 par->sample_rate != rtp_payload_types[i].clock_rate) ||
122 ✗ (rtp_payload_types[i].audio_channels > 0 &&
123 ✗ par->ch_layout.nb_channels != rtp_payload_types[i].audio_channels)))
124 1 continue;
125 ✗ return rtp_payload_types[i].pt;
126 }
127
128
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 2 if (idx < 0)
129 ✗ idx = par->codec_type == AVMEDIA_TYPE_AUDIO;
130
131 /* dynamic payload type */
132 2 return RTP_PT_PRIVATE + idx;
133 }
134
135 ✗ const char *ff_rtp_enc_name(int payload_type)
136 {
137 int i;
138
139 ✗ for (i = 0; rtp_payload_types[i].pt >= 0; i++)
140 ✗ if (rtp_payload_types[i].pt == payload_type)
141 ✗ return rtp_payload_types[i].enc_name;
142
143 ✗ return "";
144 }
145
146 ✗ enum AVCodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type)
147 {
148 int i;
149
150 ✗ for (i = 0; rtp_payload_types[i].pt >= 0; i++)
151 ✗ if (!av_strcasecmp(buf, rtp_payload_types[i].enc_name) && (codec_type == rtp_payload_types[i].codec_type))
152 ✗ return rtp_payload_types[i].codec_id;
153
154 ✗ return AV_CODEC_ID_NONE;
155 }
156