2 * RTP input/output format
3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/avstring.h"
23 #include "libavutil/opt.h"
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
36 const char enc_name
[6];
37 enum AVMediaType codec_type
;
38 enum AVCodecID codec_id
;
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_NONE
, 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}
71 int ff_rtp_get_codec_info(AVCodecContext
*codec
, int payload_type
)
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 codec
->codec_type
= rtp_payload_types
[i
].codec_type
;
79 codec
->codec_id
= rtp_payload_types
[i
].codec_id
;
80 if (rtp_payload_types
[i
].audio_channels
> 0)
81 codec
->channels
= rtp_payload_types
[i
].audio_channels
;
82 if (rtp_payload_types
[i
].clock_rate
> 0)
83 codec
->sample_rate
= rtp_payload_types
[i
].clock_rate
;
90 int ff_rtp_get_payload_type(AVFormatContext
*fmt
,
91 AVCodecContext
*codec
, int idx
)
94 AVOutputFormat
*ofmt
= fmt
? fmt
->oformat
: NULL
;
96 /* Was the payload type already specified for the RTP muxer? */
97 if (ofmt
&& ofmt
->priv_class
&& fmt
->priv_data
) {
99 if (av_opt_get_int(fmt
->priv_data
, "payload_type", 0, &payload_type
) >= 0 &&
101 return (int)payload_type
;
104 /* static payload type */
105 for (i
= 0; rtp_payload_types
[i
].pt
>= 0; ++i
)
106 if (rtp_payload_types
[i
].codec_id
== codec
->codec_id
) {
107 if (codec
->codec_id
== AV_CODEC_ID_H263
&& (!fmt
|| !fmt
->oformat
||
108 !fmt
->oformat
->priv_class
|| !fmt
->priv_data
||
109 !av_opt_flag_is_set(fmt
->priv_data
, "rtpflags", "rfc2190")))
111 /* G722 has 8000 as nominal rate even if the sample rate is 16000,
112 * see section 4.5.2 in RFC 3551. */
113 if (codec
->codec_id
== AV_CODEC_ID_ADPCM_G722
&&
114 codec
->sample_rate
== 16000 && codec
->channels
== 1)
115 return rtp_payload_types
[i
].pt
;
116 if (codec
->codec_type
== AVMEDIA_TYPE_AUDIO
&&
117 ((rtp_payload_types
[i
].clock_rate
> 0 &&
118 codec
->sample_rate
!= rtp_payload_types
[i
].clock_rate
) ||
119 (rtp_payload_types
[i
].audio_channels
> 0 &&
120 codec
->channels
!= rtp_payload_types
[i
].audio_channels
)))
122 return rtp_payload_types
[i
].pt
;
126 idx
= codec
->codec_type
== AVMEDIA_TYPE_AUDIO
;
128 /* dynamic payload type */
129 return RTP_PT_PRIVATE
+ idx
;
132 const char *ff_rtp_enc_name(int payload_type
)
136 for (i
= 0; rtp_payload_types
[i
].pt
>= 0; i
++)
137 if (rtp_payload_types
[i
].pt
== payload_type
)
138 return rtp_payload_types
[i
].enc_name
;
143 enum AVCodecID
ff_rtp_codec_id(const char *buf
, enum AVMediaType codec_type
)
147 for (i
= 0; rtp_payload_types
[i
].pt
>= 0; i
++)
148 if (!av_strcasecmp(buf
, rtp_payload_types
[i
].enc_name
) && (codec_type
== rtp_payload_types
[i
].codec_type
))
149 return rtp_payload_types
[i
].codec_id
;
151 return AV_CODEC_ID_NONE
;