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
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
37 const char enc_name[6];
38 enum AVMediaType codec_type;
39 enum CodecID codec_id;
42 } AVRtpPayloadTypes[]=
44 {0, "PCMU", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
45 {3, "GSM", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
46 {4, "G723", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
47 {5, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
48 {6, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
49 {7, "LPC", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
50 {8, "PCMA", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
51 {9, "G722", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
52 {10, "L16", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
53 {11, "L16", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1},
54 {12, "QCELP", AVMEDIA_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1},
55 {13, "CN", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
56 {14, "MPA", AVMEDIA_TYPE_AUDIO, CODEC_ID_MP2, -1, -1},
57 {14, "MPA", AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3, -1, -1},
58 {15, "G728", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
59 {16, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
60 {17, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
61 {18, "G729", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
62 {25, "CelB", AVMEDIA_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
63 {26, "JPEG", AVMEDIA_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
64 {28, "nv", AVMEDIA_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
65 {31, "H261", AVMEDIA_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
66 {32, "MPV", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1},
67 {32, "MPV", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, 90000, -1},
68 {33, "MP2T", AVMEDIA_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1},
69 {34, "H263", AVMEDIA_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
70 {-1, "", AVMEDIA_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}
73 int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type)
77 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
78 if (AVRtpPayloadTypes[i].pt == payload_type) {
79 if (AVRtpPayloadTypes[i].codec_id != CODEC_ID_NONE) {
80 codec->codec_type = AVRtpPayloadTypes[i].codec_type;
81 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
82 if (AVRtpPayloadTypes[i].audio_channels > 0)
83 codec->channels = AVRtpPayloadTypes[i].audio_channels;
84 if (AVRtpPayloadTypes[i].clock_rate > 0)
85 codec->sample_rate = AVRtpPayloadTypes[i].clock_rate;
92 int ff_rtp_get_payload_type(AVCodecContext *codec)
96 /* compute the payload type */
97 for (payload_type = -1, i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
98 if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {
99 if (codec->codec_id == CODEC_ID_H263)
101 if (codec->codec_id == CODEC_ID_PCM_S16BE)
102 if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
104 payload_type = AVRtpPayloadTypes[i].pt;
109 const char *ff_rtp_enc_name(int payload_type)
113 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
114 if (AVRtpPayloadTypes[i].pt == payload_type) {
115 return AVRtpPayloadTypes[i].enc_name;
121 enum CodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type)
125 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
126 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec_type == AVRtpPayloadTypes[i].codec_type)){
127 return AVRtpPayloadTypes[i].codec_id;
130 return CODEC_ID_NONE;