Remame rtp_get_codec_info() to ff_rtp_get_codec_info(), as it is not
[libav.git] / libavformat / rtp.c
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 "libavcodec/bitstream.h"
23 #include "avformat.h"
24
25 #include <unistd.h>
26 #include "network.h"
27
28 #include "rtp.h"
29
30 //#define DEBUG
31
32 /* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */
33 /* payload types >= 96 are dynamic;
34 * payload types between 72 and 76 are reserved for RTCP conflict avoidance;
35 * all the other payload types not present in the table are unassigned or
36 * reserved
37 */
38 static const struct
39 {
40 int pt;
41 const char enc_name[6];
42 enum CodecType codec_type;
43 enum CodecID codec_id;
44 int clock_rate;
45 int audio_channels;
46 } AVRtpPayloadTypes[]=
47 {
48 {0, "PCMU", CODEC_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
49 {3, "GSM", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
50 {4, "G723", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
51 {5, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
52 {6, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
53 {7, "LPC", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
54 {8, "PCMA", CODEC_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
55 {9, "G722", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
56 {10, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
57 {11, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1},
58 {12, "QCELP", CODEC_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1},
59 {13, "CN", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
60 {14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP2, -1, -1},
61 {14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP3, -1, -1},
62 {15, "G728", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
63 {16, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
64 {17, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
65 {18, "G729", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
66 {25, "CelB", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
67 {26, "JPEG", CODEC_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
68 {28, "nv", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
69 {31, "H261", CODEC_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
70 {32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1},
71 {32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, 90000, -1},
72 {33, "MP2T", CODEC_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1},
73 {34, "H263", CODEC_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
74 {-1, "", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}
75 };
76
77 int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type)
78 {
79 int i = 0;
80
81 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
82 if (AVRtpPayloadTypes[i].pt == payload_type) {
83 if (AVRtpPayloadTypes[i].codec_id != CODEC_ID_NONE) {
84 codec->codec_type = AVRtpPayloadTypes[i].codec_type;
85 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
86 if (AVRtpPayloadTypes[i].audio_channels > 0)
87 codec->channels = AVRtpPayloadTypes[i].audio_channels;
88 if (AVRtpPayloadTypes[i].clock_rate > 0)
89 codec->sample_rate = AVRtpPayloadTypes[i].clock_rate;
90 return 0;
91 }
92 }
93 return -1;
94 }
95
96 int ff_rtp_get_payload_type(AVCodecContext *codec)
97 {
98 int i, payload_type;
99
100 /* compute the payload type */
101 for (payload_type = -1, i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
102 if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {
103 if (codec->codec_id == CODEC_ID_PCM_S16BE)
104 if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
105 continue;
106 payload_type = AVRtpPayloadTypes[i].pt;
107 }
108 return payload_type;
109 }
110
111 const char *ff_rtp_enc_name(int payload_type)
112 {
113 int i;
114
115 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
116 if (AVRtpPayloadTypes[i].pt == payload_type) {
117 return AVRtpPayloadTypes[i].enc_name;
118 }
119
120 return "";
121 }
122
123 enum CodecID ff_rtp_codec_id(const char *buf, enum CodecType codec_type)
124 {
125 int i;
126
127 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
128 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec_type == AVRtpPayloadTypes[i].codec_type)){
129 return AVRtpPayloadTypes[i].codec_id;
130 }
131
132 return CODEC_ID_NONE;
133 }