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