forked from FFmpeg/FFmpeg
550 lines
21 KiB
C
550 lines
21 KiB
C
/*
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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.
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*
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* 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
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* 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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* 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 "avformat.h"
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#include "mpegts.h"
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#include "bitstream.h"
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#include <unistd.h>
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#include "network.h"
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#include "rtp_internal.h"
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#include "rtp_mpv.h"
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#include "rtp_aac.h"
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//#define DEBUG
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#define RTCP_SR_SIZE 28
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/* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */
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AVRtpPayloadType_t AVRtpPayloadTypes[]=
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{
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{0, "PCMU", CODEC_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
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{1, "Reserved", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{2, "Reserved", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{3, "GSM", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{4, "G723", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{5, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{6, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
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{7, "LPC", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{8, "PCMA", CODEC_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
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{9, "G722", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{10, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
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{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, 90000, -1},
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{15, "G728", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{16, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
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{17, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
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{18, "G729", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
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{19, "reserved", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
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{20, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
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{21, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
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{22, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
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{23, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
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{24, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
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{25, "CelB", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
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{26, "JPEG", CODEC_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
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{27, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
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{28, "nv", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
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{29, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
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{30, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
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{31, "H261", CODEC_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
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{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},
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{34, "H263", CODEC_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
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{35, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{36, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{37, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{38, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{39, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{40, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{41, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{42, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{43, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{44, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{45, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{46, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{47, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{48, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{49, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{50, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{51, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{52, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{53, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{54, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{55, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{56, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{57, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{58, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{59, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{60, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{61, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{62, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{63, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{64, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{65, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{66, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{67, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{68, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{69, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{70, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{71, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{72, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{73, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{74, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{75, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{76, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{77, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{78, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{79, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{80, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{81, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{82, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{83, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{84, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{85, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{86, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{87, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{88, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{89, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{90, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{91, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{92, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{93, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{94, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{95, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{96, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{97, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{98, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{99, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{100, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{101, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{102, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{103, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{104, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{105, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{106, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{107, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{108, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{109, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{110, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{111, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{112, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{113, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{114, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{115, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{116, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{117, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{118, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{119, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{120, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{121, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{122, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{123, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{124, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{125, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{126, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{127, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
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{-1, "", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}
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};
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int rtp_get_codec_info(AVCodecContext *codec, int payload_type)
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{
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int i = 0;
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for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
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if (AVRtpPayloadTypes[i].pt == payload_type) {
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if (AVRtpPayloadTypes[i].codec_id != CODEC_ID_NONE) {
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codec->codec_type = AVRtpPayloadTypes[i].codec_type;
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codec->codec_id = AVRtpPayloadTypes[i].codec_id;
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if (AVRtpPayloadTypes[i].audio_channels > 0)
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codec->channels = AVRtpPayloadTypes[i].audio_channels;
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if (AVRtpPayloadTypes[i].clock_rate > 0)
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codec->sample_rate = AVRtpPayloadTypes[i].clock_rate;
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return 0;
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}
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}
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return -1;
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}
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int 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)
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if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {
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if (codec->codec_id == CODEC_ID_PCM_S16BE)
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if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
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continue;
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payload_type = AVRtpPayloadTypes[i].pt;
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}
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return payload_type;
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}
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const char *ff_rtp_enc_name(int payload_type)
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{
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int i;
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for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
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if (AVRtpPayloadTypes[i].pt == payload_type) {
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return AVRtpPayloadTypes[i].enc_name;
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}
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return "";
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}
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enum CodecID ff_rtp_codec_id(const char *buf, enum CodecType codec_type)
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{
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int i;
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for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)
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if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec_type == AVRtpPayloadTypes[i].codec_type)){
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return AVRtpPayloadTypes[i].codec_id;
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}
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return CODEC_ID_NONE;
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}
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/* rtp output */
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static int rtp_write_header(AVFormatContext *s1)
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{
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RTPDemuxContext *s = s1->priv_data;
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int payload_type, max_packet_size, n;
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AVStream *st;
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if (s1->nb_streams != 1)
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return -1;
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st = s1->streams[0];
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payload_type = rtp_get_payload_type(st->codec);
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if (payload_type < 0)
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payload_type = RTP_PT_PRIVATE; /* private payload type */
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s->payload_type = payload_type;
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// following 2 FIXMEs could be set based on the current time, there is normally no info leak, as RTP will likely be transmitted immediately
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s->base_timestamp = 0; /* FIXME: was random(), what should this be? */
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s->timestamp = s->base_timestamp;
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s->cur_timestamp = 0;
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s->ssrc = 0; /* FIXME: was random(), what should this be? */
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s->first_packet = 1;
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s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
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max_packet_size = url_fget_max_packet_size(s1->pb);
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if (max_packet_size <= 12)
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return AVERROR(EIO);
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s->max_payload_size = max_packet_size - 12;
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s->max_frames_per_packet = 0;
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if (s1->max_delay) {
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if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
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if (st->codec->frame_size == 0) {
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av_log(s1, AV_LOG_ERROR, "Cannot respect max delay: frame size = 0\n");
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} else {
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s->max_frames_per_packet = av_rescale_rnd(s1->max_delay, st->codec->sample_rate, AV_TIME_BASE * st->codec->frame_size, AV_ROUND_DOWN);
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}
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}
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if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
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/* FIXME: We should round down here... */
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s->max_frames_per_packet = av_rescale_q(s1->max_delay, AV_TIME_BASE_Q, st->codec->time_base);
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}
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}
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av_set_pts_info(st, 32, 1, 90000);
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switch(st->codec->codec_id) {
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case CODEC_ID_MP2:
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case CODEC_ID_MP3:
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s->buf_ptr = s->buf + 4;
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break;
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case CODEC_ID_MPEG1VIDEO:
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case CODEC_ID_MPEG2VIDEO:
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break;
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case CODEC_ID_MPEG2TS:
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n = s->max_payload_size / TS_PACKET_SIZE;
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if (n < 1)
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n = 1;
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s->max_payload_size = n * TS_PACKET_SIZE;
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s->buf_ptr = s->buf;
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break;
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case CODEC_ID_AAC:
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s->read_buf_index = 0;
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default:
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if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
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av_set_pts_info(st, 32, 1, st->codec->sample_rate);
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}
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s->buf_ptr = s->buf;
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break;
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}
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return 0;
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}
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/* send an rtcp sender report packet */
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static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
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{
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RTPDemuxContext *s = s1->priv_data;
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uint32_t rtp_ts;
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#if defined(DEBUG)
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printf("RTCP: %02x %"PRIx64" %x\n", s->payload_type, ntp_time, s->timestamp);
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#endif
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if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE) s->first_rtcp_ntp_time = ntp_time;
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s->last_rtcp_ntp_time = ntp_time;
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rtp_ts = av_rescale_q(ntp_time - s->first_rtcp_ntp_time, AV_TIME_BASE_Q,
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s1->streams[0]->time_base) + s->base_timestamp;
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put_byte(s1->pb, (RTP_VERSION << 6));
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put_byte(s1->pb, 200);
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put_be16(s1->pb, 6); /* length in words - 1 */
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put_be32(s1->pb, s->ssrc);
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put_be32(s1->pb, ntp_time / 1000000);
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put_be32(s1->pb, ((ntp_time % 1000000) << 32) / 1000000);
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put_be32(s1->pb, rtp_ts);
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put_be32(s1->pb, s->packet_count);
|
|
put_be32(s1->pb, s->octet_count);
|
|
put_flush_packet(s1->pb);
|
|
}
|
|
|
|
/* send an rtp packet. sequence number is incremented, but the caller
|
|
must update the timestamp itself */
|
|
void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
|
|
#ifdef DEBUG
|
|
printf("rtp_send_data size=%d\n", len);
|
|
#endif
|
|
|
|
/* build the RTP header */
|
|
put_byte(s1->pb, (RTP_VERSION << 6));
|
|
put_byte(s1->pb, (s->payload_type & 0x7f) | ((m & 0x01) << 7));
|
|
put_be16(s1->pb, s->seq);
|
|
put_be32(s1->pb, s->timestamp);
|
|
put_be32(s1->pb, s->ssrc);
|
|
|
|
put_buffer(s1->pb, buf1, len);
|
|
put_flush_packet(s1->pb);
|
|
|
|
s->seq++;
|
|
s->octet_count += len;
|
|
s->packet_count++;
|
|
}
|
|
|
|
/* send an integer number of samples and compute time stamp and fill
|
|
the rtp send buffer before sending. */
|
|
static void rtp_send_samples(AVFormatContext *s1,
|
|
const uint8_t *buf1, int size, int sample_size)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
int len, max_packet_size, n;
|
|
|
|
max_packet_size = (s->max_payload_size / sample_size) * sample_size;
|
|
/* not needed, but who nows */
|
|
if ((size % sample_size) != 0)
|
|
av_abort();
|
|
n = 0;
|
|
while (size > 0) {
|
|
s->buf_ptr = s->buf;
|
|
len = FFMIN(max_packet_size, size);
|
|
|
|
/* copy data */
|
|
memcpy(s->buf_ptr, buf1, len);
|
|
s->buf_ptr += len;
|
|
buf1 += len;
|
|
size -= len;
|
|
s->timestamp = s->cur_timestamp + n / sample_size;
|
|
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
|
|
n += (s->buf_ptr - s->buf);
|
|
}
|
|
}
|
|
|
|
/* NOTE: we suppose that exactly one frame is given as argument here */
|
|
/* XXX: test it */
|
|
static void rtp_send_mpegaudio(AVFormatContext *s1,
|
|
const uint8_t *buf1, int size)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
int len, count, max_packet_size;
|
|
|
|
max_packet_size = s->max_payload_size;
|
|
|
|
/* test if we must flush because not enough space */
|
|
len = (s->buf_ptr - s->buf);
|
|
if ((len + size) > max_packet_size) {
|
|
if (len > 4) {
|
|
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
|
|
s->buf_ptr = s->buf + 4;
|
|
}
|
|
}
|
|
if (s->buf_ptr == s->buf + 4) {
|
|
s->timestamp = s->cur_timestamp;
|
|
}
|
|
|
|
/* add the packet */
|
|
if (size > max_packet_size) {
|
|
/* big packet: fragment */
|
|
count = 0;
|
|
while (size > 0) {
|
|
len = max_packet_size - 4;
|
|
if (len > size)
|
|
len = size;
|
|
/* build fragmented packet */
|
|
s->buf[0] = 0;
|
|
s->buf[1] = 0;
|
|
s->buf[2] = count >> 8;
|
|
s->buf[3] = count;
|
|
memcpy(s->buf + 4, buf1, len);
|
|
ff_rtp_send_data(s1, s->buf, len + 4, 0);
|
|
size -= len;
|
|
buf1 += len;
|
|
count += len;
|
|
}
|
|
} else {
|
|
if (s->buf_ptr == s->buf + 4) {
|
|
/* no fragmentation possible */
|
|
s->buf[0] = 0;
|
|
s->buf[1] = 0;
|
|
s->buf[2] = 0;
|
|
s->buf[3] = 0;
|
|
}
|
|
memcpy(s->buf_ptr, buf1, size);
|
|
s->buf_ptr += size;
|
|
}
|
|
}
|
|
|
|
static void rtp_send_raw(AVFormatContext *s1,
|
|
const uint8_t *buf1, int size)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
int len, max_packet_size;
|
|
|
|
max_packet_size = s->max_payload_size;
|
|
|
|
while (size > 0) {
|
|
len = max_packet_size;
|
|
if (len > size)
|
|
len = size;
|
|
|
|
s->timestamp = s->cur_timestamp;
|
|
ff_rtp_send_data(s1, buf1, len, (len == size));
|
|
|
|
buf1 += len;
|
|
size -= len;
|
|
}
|
|
}
|
|
|
|
/* NOTE: size is assumed to be an integer multiple of TS_PACKET_SIZE */
|
|
static void rtp_send_mpegts_raw(AVFormatContext *s1,
|
|
const uint8_t *buf1, int size)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
int len, out_len;
|
|
|
|
while (size >= TS_PACKET_SIZE) {
|
|
len = s->max_payload_size - (s->buf_ptr - s->buf);
|
|
if (len > size)
|
|
len = size;
|
|
memcpy(s->buf_ptr, buf1, len);
|
|
buf1 += len;
|
|
size -= len;
|
|
s->buf_ptr += len;
|
|
|
|
out_len = s->buf_ptr - s->buf;
|
|
if (out_len >= s->max_payload_size) {
|
|
ff_rtp_send_data(s1, s->buf, out_len, 0);
|
|
s->buf_ptr = s->buf;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* write an RTP packet. 'buf1' must contain a single specific frame. */
|
|
static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
|
|
{
|
|
RTPDemuxContext *s = s1->priv_data;
|
|
AVStream *st = s1->streams[0];
|
|
int rtcp_bytes;
|
|
int size= pkt->size;
|
|
uint8_t *buf1= pkt->data;
|
|
|
|
#ifdef DEBUG
|
|
printf("%d: write len=%d\n", pkt->stream_index, size);
|
|
#endif
|
|
|
|
/* XXX: mpeg pts hardcoded. RTCP send every 0.5 seconds */
|
|
rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
|
|
RTCP_TX_RATIO_DEN;
|
|
if (s->first_packet || ((rtcp_bytes >= RTCP_SR_SIZE) &&
|
|
(av_gettime() - s->last_rtcp_ntp_time > 5000000))) {
|
|
rtcp_send_sr(s1, av_gettime());
|
|
s->last_octet_count = s->octet_count;
|
|
s->first_packet = 0;
|
|
}
|
|
s->cur_timestamp = s->base_timestamp + pkt->pts;
|
|
|
|
switch(st->codec->codec_id) {
|
|
case CODEC_ID_PCM_MULAW:
|
|
case CODEC_ID_PCM_ALAW:
|
|
case CODEC_ID_PCM_U8:
|
|
case CODEC_ID_PCM_S8:
|
|
rtp_send_samples(s1, buf1, size, 1 * st->codec->channels);
|
|
break;
|
|
case CODEC_ID_PCM_U16BE:
|
|
case CODEC_ID_PCM_U16LE:
|
|
case CODEC_ID_PCM_S16BE:
|
|
case CODEC_ID_PCM_S16LE:
|
|
rtp_send_samples(s1, buf1, size, 2 * st->codec->channels);
|
|
break;
|
|
case CODEC_ID_MP2:
|
|
case CODEC_ID_MP3:
|
|
rtp_send_mpegaudio(s1, buf1, size);
|
|
break;
|
|
case CODEC_ID_MPEG1VIDEO:
|
|
case CODEC_ID_MPEG2VIDEO:
|
|
ff_rtp_send_mpegvideo(s1, buf1, size);
|
|
break;
|
|
case CODEC_ID_AAC:
|
|
ff_rtp_send_aac(s1, buf1, size);
|
|
break;
|
|
case CODEC_ID_MPEG2TS:
|
|
rtp_send_mpegts_raw(s1, buf1, size);
|
|
break;
|
|
default:
|
|
/* better than nothing : send the codec raw data */
|
|
rtp_send_raw(s1, buf1, size);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat rtp_muxer = {
|
|
"rtp",
|
|
"RTP output format",
|
|
NULL,
|
|
NULL,
|
|
sizeof(RTPDemuxContext),
|
|
CODEC_ID_PCM_MULAW,
|
|
CODEC_ID_NONE,
|
|
rtp_write_header,
|
|
rtp_write_packet,
|
|
};
|