/* * RTP input/output format * Copyright (c) 2002 Fabrice Bellard * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <libavutil/opt.h> #include "avformat.h" #include "rtp.h" //#define DEBUG /* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */ /* payload types >= 96 are dynamic; * payload types between 72 and 76 are reserved for RTCP conflict avoidance; * all the other payload types not present in the table are unassigned or * reserved */ static const struct { int pt; const char enc_name[6]; enum AVMediaType codec_type; enum AVCodecID codec_id; int clock_rate; int audio_channels; } AVRtpPayloadTypes[]= { {0, "PCMU", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_MULAW, 8000, 1}, {3, "GSM", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {4, "G723", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_G723_1, 8000, 1}, {5, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {6, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 16000, 1}, {7, "LPC", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {8, "PCMA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_ALAW, 8000, 1}, {9, "G722", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_ADPCM_G722, 8000, 1}, {10, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 2}, {11, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 1}, {12, "QCELP", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_QCELP, 8000, 1}, {13, "CN", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP2, -1, -1}, {14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3, -1, -1}, {15, "G728", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {16, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 11025, 1}, {17, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 22050, 1}, {18, "G729", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1}, {25, "CelB", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1}, {26, "JPEG", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MJPEG, 90000, -1}, {28, "nv", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1}, {31, "H261", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H261, 90000, -1}, {32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG1VIDEO, 90000, -1}, {32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO, 90000, -1}, {33, "MP2T", AVMEDIA_TYPE_DATA, AV_CODEC_ID_MPEG2TS, 90000, -1}, {34, "H263", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H263, 90000, -1}, {-1, "", AVMEDIA_TYPE_UNKNOWN, AV_CODEC_ID_NONE, -1, -1} }; int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type) { int i = 0; for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++) if (AVRtpPayloadTypes[i].pt == payload_type) { if (AVRtpPayloadTypes[i].codec_id != AV_CODEC_ID_NONE) { codec->codec_type = AVRtpPayloadTypes[i].codec_type; codec->codec_id = AVRtpPayloadTypes[i].codec_id; if (AVRtpPayloadTypes[i].audio_channels > 0) codec->channels = AVRtpPayloadTypes[i].audio_channels; if (AVRtpPayloadTypes[i].clock_rate > 0) codec->sample_rate = AVRtpPayloadTypes[i].clock_rate; return 0; } } return -1; } int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec) { int i; AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL; /* Was the payload type already specified for the RTP muxer? */ if (ofmt && ofmt->priv_class) { int64_t payload_type; if (av_opt_get_int(fmt->priv_data, "payload_type", 0, &payload_type) >= 0 && payload_type >= 0) return (int)payload_type; } /* static payload type */ for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i) if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) { if (codec->codec_id == AV_CODEC_ID_H263 && (!fmt || !fmt->oformat->priv_class || !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190"))) continue; /* G722 has 8000 as nominal rate even if the sample rate is 16000, * see section 4.5.2 in RFC 3551. */ if (codec->codec_id == AV_CODEC_ID_ADPCM_G722 && codec->sample_rate == 16000 && codec->channels == 1) return AVRtpPayloadTypes[i].pt; if (codec->codec_type == AVMEDIA_TYPE_AUDIO && ((AVRtpPayloadTypes[i].clock_rate > 0 && codec->sample_rate != AVRtpPayloadTypes[i].clock_rate) || (AVRtpPayloadTypes[i].audio_channels > 0 && codec->channels != AVRtpPayloadTypes[i].audio_channels))) continue; return AVRtpPayloadTypes[i].pt; } /* dynamic payload type */ return RTP_PT_PRIVATE + (codec->codec_type == AVMEDIA_TYPE_AUDIO); } const char *ff_rtp_enc_name(int payload_type) { int i; for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++) if (AVRtpPayloadTypes[i].pt == payload_type) { return AVRtpPayloadTypes[i].enc_name; } return ""; } enum AVCodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type) { int i; for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++) if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec_type == AVRtpPayloadTypes[i].codec_type)){ return AVRtpPayloadTypes[i].codec_id; } return AV_CODEC_ID_NONE; }