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/*
* RTP input/output format |
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* Copyright (c) 2002 Fabrice Bellard |
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* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* 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 |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavcodec/bitstream.h" |
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#include "avformat.h"
#include <unistd.h> |
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#include "network.h" |
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|
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#include "rtp.h" |
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|
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//#define DEBUG
|
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/* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */ |
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/* 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
*/ |
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static const struct
{
int pt; |
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const char enc_name[6]; |
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enum CodecType codec_type;
enum CodecID codec_id;
int clock_rate;
int audio_channels;
} AVRtpPayloadTypes[]= |
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{
{0, "PCMU", CODEC_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
{3, "GSM", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{4, "G723", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{5, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{6, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
{7, "LPC", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{8, "PCMA", CODEC_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
{9, "G722", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{10, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
{11, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1}, |
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{12, "QCELP", CODEC_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1}, |
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{13, "CN", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1}, |
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{14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP2, -1, -1},
{14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP3, -1, -1}, |
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{15, "G728", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{16, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
{17, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
{18, "G729", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
{25, "CelB", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
{26, "JPEG", CODEC_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
{28, "nv", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
{31, "H261", CODEC_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
{32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1}, |
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{32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, 90000, -1}, |
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{33, "MP2T", CODEC_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1},
{34, "H263", CODEC_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
{-1, "", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}
};
|
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int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type) |
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{ |
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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;
}
} |
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return -1; |
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}
|
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int ff_rtp_get_payload_type(AVCodecContext *codec) |
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{ |
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int i, payload_type; |
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/* compute the payload type */ |
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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_PCM_S16BE)
if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
continue;
payload_type = AVRtpPayloadTypes[i].pt; |
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}
return payload_type;
}
|
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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 CodecType 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;
} |