| /* |
| * RTP input/output format |
| * Copyright (c) 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/avstring.h" |
| #include "libavutil/opt.h" |
| #include "avformat.h" |
| |
| #include "rtp.h" |
| |
| /* 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; |
| } rtp_payload_types[] = { |
| {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; rtp_payload_types[i].pt >= 0; i++) |
| if (rtp_payload_types[i].pt == payload_type) { |
| if (rtp_payload_types[i].codec_id != AV_CODEC_ID_NONE) { |
| codec->codec_type = rtp_payload_types[i].codec_type; |
| codec->codec_id = rtp_payload_types[i].codec_id; |
| if (rtp_payload_types[i].audio_channels > 0) |
| codec->channels = rtp_payload_types[i].audio_channels; |
| if (rtp_payload_types[i].clock_rate > 0) |
| codec->sample_rate = rtp_payload_types[i].clock_rate; |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| int ff_rtp_get_payload_type(AVFormatContext *fmt, |
| AVCodecContext *codec, int idx) |
| { |
| int i; |
| AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL; |
| |
| /* Was the payload type already specified for the RTP muxer? */ |
| if (ofmt && ofmt->priv_class && fmt->priv_data) { |
| 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; rtp_payload_types[i].pt >= 0; ++i) |
| if (rtp_payload_types[i].codec_id == codec->codec_id) { |
| if (codec->codec_id == AV_CODEC_ID_H263 && (!fmt || !fmt->oformat || |
| !fmt->oformat->priv_class || !fmt->priv_data || |
| !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 rtp_payload_types[i].pt; |
| if (codec->codec_type == AVMEDIA_TYPE_AUDIO && |
| ((rtp_payload_types[i].clock_rate > 0 && |
| codec->sample_rate != rtp_payload_types[i].clock_rate) || |
| (rtp_payload_types[i].audio_channels > 0 && |
| codec->channels != rtp_payload_types[i].audio_channels))) |
| continue; |
| return rtp_payload_types[i].pt; |
| } |
| |
| if (idx < 0) |
| idx = codec->codec_type == AVMEDIA_TYPE_AUDIO; |
| |
| /* dynamic payload type */ |
| return RTP_PT_PRIVATE + idx; |
| } |
| |
| const char *ff_rtp_enc_name(int payload_type) |
| { |
| int i; |
| |
| for (i = 0; rtp_payload_types[i].pt >= 0; i++) |
| if (rtp_payload_types[i].pt == payload_type) |
| return rtp_payload_types[i].enc_name; |
| |
| return ""; |
| } |
| |
| enum AVCodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type) |
| { |
| int i; |
| |
| for (i = 0; rtp_payload_types[i].pt >= 0; i++) |
| if (!av_strcasecmp(buf, rtp_payload_types[i].enc_name) && (codec_type == rtp_payload_types[i].codec_type)) |
| return rtp_payload_types[i].codec_id; |
| |
| return AV_CODEC_ID_NONE; |
| } |
