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 "avformat.h" 23 24#include "rtp.h" 25 26//#define DEBUG 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 */ 34static const struct 35{ 36 int pt; 37 const char enc_name[6]; 38 enum AVMediaType codec_type; 39 enum CodecID codec_id; 40 int clock_rate; 41 int audio_channels; 42} AVRtpPayloadTypes[]= 43{ 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} 71}; 72 73int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type) 74{ 75 int i = 0; 76 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; 86 return 0; 87 } 88 } 89 return -1; 90} 91 92int ff_rtp_get_payload_type(AVCodecContext *codec) 93{ 94 int i, payload_type; 95 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) 100 continue; 101 if (codec->codec_id == CODEC_ID_PCM_S16BE) 102 if (codec->channels != AVRtpPayloadTypes[i].audio_channels) 103 continue; 104 payload_type = AVRtpPayloadTypes[i].pt; 105 } 106 return payload_type; 107} 108 109const char *ff_rtp_enc_name(int payload_type) 110{ 111 int i; 112 113 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++) 114 if (AVRtpPayloadTypes[i].pt == payload_type) { 115 return AVRtpPayloadTypes[i].enc_name; 116 } 117 118 return ""; 119} 120 121enum CodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type) 122{ 123 int i; 124 125 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; 128 } 129 130 return CODEC_ID_NONE; 131} 132