/*
* 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;
}