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 */ 38static 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 77int 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 96int 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 111const 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 123enum 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} 134