mirror of https://git.ffmpeg.org/ffmpeg.git
132 lines
5.0 KiB
C
132 lines
5.0 KiB
C
/*
|
|
* 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 "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 CodecID codec_id;
|
|
int clock_rate;
|
|
int audio_channels;
|
|
} AVRtpPayloadTypes[]=
|
|
{
|
|
{0, "PCMU", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
|
|
{3, "GSM", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{4, "G723", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{5, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{6, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
|
|
{7, "LPC", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{8, "PCMA", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
|
|
{9, "G722", AVMEDIA_TYPE_AUDIO, CODEC_ID_ADPCM_G722, 8000, 1},
|
|
{10, "L16", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
|
|
{11, "L16", AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1},
|
|
{12, "QCELP", AVMEDIA_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1},
|
|
{13, "CN", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{14, "MPA", AVMEDIA_TYPE_AUDIO, CODEC_ID_MP2, -1, -1},
|
|
{14, "MPA", AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3, -1, -1},
|
|
{15, "G728", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{16, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
|
|
{17, "DVI4", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
|
|
{18, "G729", AVMEDIA_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
|
|
{25, "CelB", AVMEDIA_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
|
|
{26, "JPEG", AVMEDIA_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
|
|
{28, "nv", AVMEDIA_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
|
|
{31, "H261", AVMEDIA_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
|
|
{32, "MPV", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1},
|
|
{32, "MPV", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, 90000, -1},
|
|
{33, "MP2T", AVMEDIA_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1},
|
|
{34, "H263", AVMEDIA_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
|
|
{-1, "", AVMEDIA_TYPE_UNKNOWN, 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 != 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(AVCodecContext *codec)
|
|
{
|
|
int i, payload_type;
|
|
|
|
/* compute the payload type */
|
|
for (payload_type = -1, i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
|
|
if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {
|
|
if (codec->codec_id == CODEC_ID_H263)
|
|
continue;
|
|
if (codec->codec_id == CODEC_ID_PCM_S16BE)
|
|
if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
|
|
continue;
|
|
payload_type = AVRtpPayloadTypes[i].pt;
|
|
}
|
|
return payload_type;
|
|
}
|
|
|
|
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 CodecID 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 CODEC_ID_NONE;
|
|
}
|