2008-01-04 19:33:50 +00:00
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/*
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* RTP input format
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2009-01-19 15:46:40 +00:00
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* Copyright (c) 2002 Fabrice Bellard
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2008-01-04 19:33:50 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* This file is part of Libav.
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2008-01-04 19:33:50 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is free software; you can redistribute it and/or
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2008-01-04 19:33:50 +00:00
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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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2011-03-18 17:35:10 +00:00
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* Libav is distributed in the hope that it will be useful,
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2008-01-04 19:33:50 +00:00
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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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2011-03-18 17:35:10 +00:00
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* License along with Libav; if not, write to the Free Software
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2008-01-04 19:33:50 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2008-05-09 11:56:36 +00:00
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2011-06-04 11:58:23 +00:00
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#include "libavutil/mathematics.h"
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2011-11-02 19:17:25 +00:00
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#include "libavutil/avstring.h"
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2012-07-27 14:28:36 +00:00
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#include "libavutil/time.h"
|
2009-04-13 16:20:26 +00:00
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#include "libavcodec/get_bits.h"
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2008-01-04 19:33:50 +00:00
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#include "avformat.h"
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#include "mpegts.h"
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2011-03-31 14:48:01 +00:00
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#include "url.h"
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2008-01-04 19:33:50 +00:00
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#include "network.h"
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2009-02-06 10:35:52 +00:00
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#include "rtpdec.h"
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2010-07-30 12:04:27 +00:00
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#include "rtpdec_formats.h"
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2008-01-04 19:33:50 +00:00
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//#define DEBUG
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/* TODO: - add RTCP statistics reporting (should be optional).
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- add support for h263/mpeg4 packetized output : IDEA: send a
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buffer to 'rtp_write_packet' contains all the packets for ONE
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frame. Each packet should have a four byte header containing
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the length in big endian format (same trick as
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2011-03-17 07:19:54 +00:00
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'ffio_open_dyn_packet_buf')
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2008-01-04 19:33:50 +00:00
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*/
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2012-09-23 10:32:41 +00:00
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static RTPDynamicProtocolHandler realmedia_mp3_dynamic_handler = {
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2010-12-07 13:28:13 +00:00
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.enc_name = "X-MP3-draft-00",
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.codec_type = AVMEDIA_TYPE_AUDIO,
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2012-08-05 09:11:04 +00:00
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.codec_id = AV_CODEC_ID_MP3ADU,
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2010-12-07 13:28:13 +00:00
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};
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2012-09-22 10:39:03 +00:00
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static RTPDynamicProtocolHandler speex_dynamic_handler = {
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.enc_name = "speex",
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.codec_type = AVMEDIA_TYPE_AUDIO,
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.codec_id = AV_CODEC_ID_SPEEX,
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};
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2012-10-08 21:51:42 +00:00
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static RTPDynamicProtocolHandler opus_dynamic_handler = {
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.enc_name = "opus",
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.codec_type = AVMEDIA_TYPE_AUDIO,
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.codec_id = AV_CODEC_ID_OPUS,
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};
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2008-01-04 19:33:50 +00:00
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/* statistics functions */
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2011-01-24 23:36:18 +00:00
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static RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
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2008-01-04 19:33:50 +00:00
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2008-09-07 01:19:26 +00:00
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void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
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2008-01-04 19:33:50 +00:00
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{
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handler->next= RTPFirstDynamicPayloadHandler;
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RTPFirstDynamicPayloadHandler= handler;
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}
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void av_register_rtp_dynamic_payload_handlers(void)
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{
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2010-06-25 07:58:38 +00:00
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ff_register_dynamic_payload_handler(&ff_mp4v_es_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_mpeg4_generic_dynamic_handler);
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2010-02-10 17:20:50 +00:00
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ff_register_dynamic_payload_handler(&ff_amr_nb_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_amr_wb_dynamic_handler);
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2010-01-28 16:08:13 +00:00
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ff_register_dynamic_payload_handler(&ff_h263_1998_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_h263_2000_dynamic_handler);
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2012-02-07 14:15:26 +00:00
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ff_register_dynamic_payload_handler(&ff_h263_rfc2190_dynamic_handler);
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2008-09-07 01:19:26 +00:00
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ff_register_dynamic_payload_handler(&ff_h264_dynamic_handler);
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2012-06-17 13:12:53 +00:00
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ff_register_dynamic_payload_handler(&ff_ilbc_dynamic_handler);
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2012-09-07 17:30:23 +00:00
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ff_register_dynamic_payload_handler(&ff_jpeg_dynamic_handler);
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2009-04-14 15:01:46 +00:00
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ff_register_dynamic_payload_handler(&ff_vorbis_dynamic_handler);
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2010-03-22 16:26:29 +00:00
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ff_register_dynamic_payload_handler(&ff_theora_dynamic_handler);
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2010-07-14 12:32:00 +00:00
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ff_register_dynamic_payload_handler(&ff_qdm2_dynamic_handler);
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2010-07-01 20:12:58 +00:00
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ff_register_dynamic_payload_handler(&ff_svq3_dynamic_handler);
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2010-08-12 21:07:17 +00:00
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ff_register_dynamic_payload_handler(&ff_mp4a_latm_dynamic_handler);
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2010-08-16 14:23:35 +00:00
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ff_register_dynamic_payload_handler(&ff_vp8_dynamic_handler);
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2010-12-05 19:37:45 +00:00
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ff_register_dynamic_payload_handler(&ff_qcelp_dynamic_handler);
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2012-09-23 10:32:41 +00:00
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ff_register_dynamic_payload_handler(&realmedia_mp3_dynamic_handler);
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2012-09-22 10:39:03 +00:00
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ff_register_dynamic_payload_handler(&speex_dynamic_handler);
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2012-10-08 21:51:42 +00:00
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ff_register_dynamic_payload_handler(&opus_dynamic_handler);
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2009-03-20 01:11:08 +00:00
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ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfv_handler);
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ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfa_handler);
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2010-10-06 12:42:18 +00:00
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ff_register_dynamic_payload_handler(&ff_qt_rtp_aud_handler);
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ff_register_dynamic_payload_handler(&ff_qt_rtp_vid_handler);
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ff_register_dynamic_payload_handler(&ff_quicktime_rtp_aud_handler);
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ff_register_dynamic_payload_handler(&ff_quicktime_rtp_vid_handler);
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2011-11-07 11:13:55 +00:00
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ff_register_dynamic_payload_handler(&ff_g726_16_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_g726_24_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_g726_32_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_g726_40_dynamic_handler);
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2008-01-04 19:33:50 +00:00
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}
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2010-12-05 19:39:50 +00:00
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RTPDynamicProtocolHandler *ff_rtp_handler_find_by_name(const char *name,
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enum AVMediaType codec_type)
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{
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RTPDynamicProtocolHandler *handler;
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for (handler = RTPFirstDynamicPayloadHandler;
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handler; handler = handler->next)
|
2011-11-02 19:17:25 +00:00
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if (!av_strcasecmp(name, handler->enc_name) &&
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2010-12-05 19:39:50 +00:00
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codec_type == handler->codec_type)
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return handler;
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return NULL;
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}
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RTPDynamicProtocolHandler *ff_rtp_handler_find_by_id(int id,
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enum AVMediaType codec_type)
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{
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RTPDynamicProtocolHandler *handler;
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for (handler = RTPFirstDynamicPayloadHandler;
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handler; handler = handler->next)
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if (handler->static_payload_id && handler->static_payload_id == id &&
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codec_type == handler->codec_type)
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return handler;
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return NULL;
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}
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2008-01-04 19:33:50 +00:00
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static int rtcp_parse_packet(RTPDemuxContext *s, const unsigned char *buf, int len)
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{
|
2010-08-29 10:19:44 +00:00
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int payload_len;
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2011-10-12 06:53:12 +00:00
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while (len >= 4) {
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payload_len = FFMIN(len, (AV_RB16(buf + 2) + 1) * 4);
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2010-08-29 10:19:44 +00:00
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switch (buf[1]) {
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case RTCP_SR:
|
2011-10-12 06:53:12 +00:00
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if (payload_len < 20) {
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2010-08-29 10:19:44 +00:00
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av_log(NULL, AV_LOG_ERROR, "Invalid length for RTCP SR packet\n");
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return AVERROR_INVALIDDATA;
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}
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2010-08-29 10:20:18 +00:00
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s->last_rtcp_ntp_time = AV_RB64(buf + 8);
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s->last_rtcp_timestamp = AV_RB32(buf + 16);
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2011-01-01 22:27:16 +00:00
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if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
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s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
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if (!s->base_timestamp)
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s->base_timestamp = s->last_rtcp_timestamp;
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s->rtcp_ts_offset = s->last_rtcp_timestamp - s->base_timestamp;
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}
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2010-08-29 10:19:44 +00:00
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break;
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2010-08-29 10:25:16 +00:00
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case RTCP_BYE:
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return -RTCP_BYE;
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2010-08-29 10:19:44 +00:00
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}
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2011-10-12 06:53:12 +00:00
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buf += payload_len;
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len -= payload_len;
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2010-08-29 10:19:44 +00:00
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}
|
2010-08-29 10:25:16 +00:00
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return -1;
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2008-01-04 19:33:50 +00:00
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}
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#define RTP_SEQ_MOD (1<<16)
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|
2012-10-22 12:54:25 +00:00
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static void rtp_init_statistics(RTPStatistics *s, uint16_t base_sequence)
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2008-01-04 19:33:50 +00:00
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{
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memset(s, 0, sizeof(RTPStatistics));
|
2012-10-22 12:54:25 +00:00
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s->max_seq = base_sequence;
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s->probation = 1;
|
2008-01-04 19:33:50 +00:00
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}
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2012-10-22 12:54:25 +00:00
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/*
|
2008-01-04 19:33:50 +00:00
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* called whenever there is a large jump in sequence numbers, or when they get out of probation...
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*/
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static void rtp_init_sequence(RTPStatistics *s, uint16_t seq)
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{
|
2012-10-22 12:54:25 +00:00
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s->max_seq = seq;
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s->cycles = 0;
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s->base_seq = seq - 1;
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s->bad_seq = RTP_SEQ_MOD + 1;
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s->received = 0;
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s->expected_prior = 0;
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s->received_prior = 0;
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s->jitter = 0;
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s->transit = 0;
|
2008-01-04 19:33:50 +00:00
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}
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|
2012-10-22 12:54:25 +00:00
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/*
|
2008-01-04 19:33:50 +00:00
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* returns 1 if we should handle this packet.
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*/
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static int rtp_valid_packet_in_sequence(RTPStatistics *s, uint16_t seq)
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{
|
2012-10-22 12:54:25 +00:00
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uint16_t udelta = seq - s->max_seq;
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const int MAX_DROPOUT = 3000;
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const int MAX_MISORDER = 100;
|
2008-01-04 19:33:50 +00:00
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const int MIN_SEQUENTIAL = 2;
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/* source not valid until MIN_SEQUENTIAL packets with sequence seq. numbers have been received */
|
2012-10-22 12:54:25 +00:00
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if (s->probation) {
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|
|
if (seq == s->max_seq + 1) {
|
2008-01-04 19:33:50 +00:00
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s->probation--;
|
2012-10-22 12:54:25 +00:00
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s->max_seq = seq;
|
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if (s->probation == 0) {
|
2008-01-04 19:33:50 +00:00
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|
rtp_init_sequence(s, seq);
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s->received++;
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return 1;
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}
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} else {
|
2012-10-22 12:54:25 +00:00
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s->probation = MIN_SEQUENTIAL - 1;
|
2008-01-04 19:33:50 +00:00
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s->max_seq = seq;
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|
|
}
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|
|
} else if (udelta < MAX_DROPOUT) {
|
|
|
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// in order, with permissible gap
|
2012-10-22 12:54:25 +00:00
|
|
|
if (seq < s->max_seq) {
|
|
|
|
// sequence number wrapped; count another 64k cycles
|
2008-01-04 19:33:50 +00:00
|
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|
s->cycles += RTP_SEQ_MOD;
|
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|
}
|
2012-10-22 12:54:25 +00:00
|
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|
s->max_seq = seq;
|
2008-01-04 19:33:50 +00:00
|
|
|
} else if (udelta <= RTP_SEQ_MOD - MAX_MISORDER) {
|
|
|
|
// sequence made a large jump...
|
2012-10-22 12:54:25 +00:00
|
|
|
if (seq == s->bad_seq) {
|
2008-01-04 19:33:50 +00:00
|
|
|
// two sequential packets-- assume that the other side restarted without telling us; just resync.
|
|
|
|
rtp_init_sequence(s, seq);
|
|
|
|
} else {
|
2012-10-22 12:54:25 +00:00
|
|
|
s->bad_seq = (seq + 1) & (RTP_SEQ_MOD - 1);
|
2008-01-04 19:33:50 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// duplicate or reordered packet...
|
|
|
|
}
|
|
|
|
s->received++;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2011-10-12 09:37:42 +00:00
|
|
|
int ff_rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
|
2008-01-04 19:33:50 +00:00
|
|
|
{
|
2011-02-20 10:04:12 +00:00
|
|
|
AVIOContext *pb;
|
2008-01-04 19:33:50 +00:00
|
|
|
uint8_t *buf;
|
|
|
|
int len;
|
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|
|
int rtcp_bytes;
|
2012-10-22 12:54:25 +00:00
|
|
|
RTPStatistics *stats = &s->statistics;
|
2008-01-04 19:33:50 +00:00
|
|
|
uint32_t lost;
|
|
|
|
uint32_t extended_max;
|
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|
|
uint32_t expected_interval;
|
|
|
|
uint32_t received_interval;
|
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|
|
uint32_t lost_interval;
|
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|
|
uint32_t expected;
|
|
|
|
uint32_t fraction;
|
2012-10-22 12:54:25 +00:00
|
|
|
uint64_t ntp_time = s->last_rtcp_ntp_time; // TODO: Get local ntp time?
|
2008-01-04 19:33:50 +00:00
|
|
|
|
|
|
|
if (!s->rtp_ctx || (count < 1))
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* TODO: I think this is way too often; RFC 1889 has algorithm for this */
|
|
|
|
/* XXX: mpeg pts hardcoded. RTCP send every 0.5 seconds */
|
|
|
|
s->octet_count += count;
|
|
|
|
rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
|
|
|
|
RTCP_TX_RATIO_DEN;
|
|
|
|
rtcp_bytes /= 50; // mmu_man: that's enough for me... VLC sends much less btw !?
|
|
|
|
if (rtcp_bytes < 28)
|
|
|
|
return -1;
|
|
|
|
s->last_octet_count = s->octet_count;
|
|
|
|
|
2011-03-17 07:13:34 +00:00
|
|
|
if (avio_open_dyn_buf(&pb) < 0)
|
2008-01-04 19:33:50 +00:00
|
|
|
return -1;
|
|
|
|
|
|
|
|
// Receiver Report
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
|
|
|
|
avio_w8(pb, RTCP_RR);
|
|
|
|
avio_wb16(pb, 7); /* length in words - 1 */
|
2010-08-23 11:53:27 +00:00
|
|
|
// our own SSRC: we use the server's SSRC + 1 to avoid conflicts
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_wb32(pb, s->ssrc + 1);
|
|
|
|
avio_wb32(pb, s->ssrc); // server SSRC
|
2008-01-04 19:33:50 +00:00
|
|
|
// some placeholders we should really fill...
|
|
|
|
// RFC 1889/p64
|
2012-10-22 12:54:25 +00:00
|
|
|
extended_max = stats->cycles + stats->max_seq;
|
|
|
|
expected = extended_max - stats->base_seq + 1;
|
|
|
|
lost = expected - stats->received;
|
|
|
|
lost = FFMIN(lost, 0xffffff); // clamp it since it's only 24 bits...
|
|
|
|
expected_interval = expected - stats->expected_prior;
|
|
|
|
stats->expected_prior = expected;
|
|
|
|
received_interval = stats->received - stats->received_prior;
|
|
|
|
stats->received_prior = stats->received;
|
|
|
|
lost_interval = expected_interval - received_interval;
|
|
|
|
if (expected_interval == 0 || lost_interval <= 0)
|
|
|
|
fraction = 0;
|
|
|
|
else
|
|
|
|
fraction = (lost_interval << 8) / expected_interval;
|
|
|
|
|
|
|
|
fraction = (fraction << 24) | lost;
|
2008-01-04 19:33:50 +00:00
|
|
|
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_wb32(pb, fraction); /* 8 bits of fraction, 24 bits of total packets lost */
|
|
|
|
avio_wb32(pb, extended_max); /* max sequence received */
|
2012-10-22 12:54:25 +00:00
|
|
|
avio_wb32(pb, stats->jitter >> 4); /* jitter */
|
2008-01-04 19:33:50 +00:00
|
|
|
|
2012-10-22 12:54:25 +00:00
|
|
|
if (s->last_rtcp_ntp_time == AV_NOPTS_VALUE) {
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_wb32(pb, 0); /* last SR timestamp */
|
|
|
|
avio_wb32(pb, 0); /* delay since last SR */
|
2008-01-04 19:33:50 +00:00
|
|
|
} else {
|
2012-10-22 12:54:25 +00:00
|
|
|
uint32_t middle_32_bits = s->last_rtcp_ntp_time >> 16; // this is valid, right? do we need to handle 64 bit values special?
|
|
|
|
uint32_t delay_since_last = ntp_time - s->last_rtcp_ntp_time;
|
2008-01-04 19:33:50 +00:00
|
|
|
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_wb32(pb, middle_32_bits); /* last SR timestamp */
|
|
|
|
avio_wb32(pb, delay_since_last); /* delay since last SR */
|
2008-01-04 19:33:50 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// CNAME
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, (RTP_VERSION << 6) + 1); /* 1 report block */
|
|
|
|
avio_w8(pb, RTCP_SDES);
|
2008-01-04 19:33:50 +00:00
|
|
|
len = strlen(s->hostname);
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_wb16(pb, (6 + len + 3) / 4); /* length in words - 1 */
|
2012-01-21 15:20:45 +00:00
|
|
|
avio_wb32(pb, s->ssrc + 1);
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, 0x01);
|
|
|
|
avio_w8(pb, len);
|
|
|
|
avio_write(pb, s->hostname, len);
|
2008-01-04 19:33:50 +00:00
|
|
|
// padding
|
|
|
|
for (len = (6 + len) % 4; len % 4; len++) {
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, 0);
|
2008-01-04 19:33:50 +00:00
|
|
|
}
|
|
|
|
|
2011-03-14 19:39:06 +00:00
|
|
|
avio_flush(pb);
|
2011-03-17 07:16:07 +00:00
|
|
|
len = avio_close_dyn_buf(pb, &buf);
|
2008-01-04 19:33:50 +00:00
|
|
|
if ((len > 0) && buf) {
|
2011-06-03 11:52:29 +00:00
|
|
|
int av_unused result;
|
2011-01-29 16:46:18 +00:00
|
|
|
av_dlog(s->ic, "sending %d bytes of RR\n", len);
|
2011-03-31 14:48:01 +00:00
|
|
|
result= ffurl_write(s->rtp_ctx, buf, len);
|
|
|
|
av_dlog(s->ic, "result from ffurl_write: %d\n", result);
|
2008-01-04 19:33:50 +00:00
|
|
|
av_free(buf);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-10-12 09:37:42 +00:00
|
|
|
void ff_rtp_send_punch_packets(URLContext* rtp_handle)
|
2010-02-16 22:50:50 +00:00
|
|
|
{
|
2011-02-20 10:04:12 +00:00
|
|
|
AVIOContext *pb;
|
2010-02-16 22:50:50 +00:00
|
|
|
uint8_t *buf;
|
|
|
|
int len;
|
|
|
|
|
|
|
|
/* Send a small RTP packet */
|
2011-03-17 07:13:34 +00:00
|
|
|
if (avio_open_dyn_buf(&pb) < 0)
|
2010-02-16 22:50:50 +00:00
|
|
|
return;
|
|
|
|
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, (RTP_VERSION << 6));
|
|
|
|
avio_w8(pb, 0); /* Payload type */
|
|
|
|
avio_wb16(pb, 0); /* Seq */
|
|
|
|
avio_wb32(pb, 0); /* Timestamp */
|
|
|
|
avio_wb32(pb, 0); /* SSRC */
|
2010-02-16 22:50:50 +00:00
|
|
|
|
2011-03-14 19:39:06 +00:00
|
|
|
avio_flush(pb);
|
2011-03-17 07:16:07 +00:00
|
|
|
len = avio_close_dyn_buf(pb, &buf);
|
2010-02-16 22:50:50 +00:00
|
|
|
if ((len > 0) && buf)
|
2011-03-31 14:48:01 +00:00
|
|
|
ffurl_write(rtp_handle, buf, len);
|
2010-02-16 22:50:50 +00:00
|
|
|
av_free(buf);
|
|
|
|
|
|
|
|
/* Send a minimal RTCP RR */
|
2011-03-17 07:13:34 +00:00
|
|
|
if (avio_open_dyn_buf(&pb) < 0)
|
2010-02-16 22:50:50 +00:00
|
|
|
return;
|
|
|
|
|
2011-02-21 18:28:17 +00:00
|
|
|
avio_w8(pb, (RTP_VERSION << 6));
|
|
|
|
avio_w8(pb, RTCP_RR); /* receiver report */
|
|
|
|
avio_wb16(pb, 1); /* length in words - 1 */
|
|
|
|
avio_wb32(pb, 0); /* our own SSRC */
|
2010-02-16 22:50:50 +00:00
|
|
|
|
2011-03-14 19:39:06 +00:00
|
|
|
avio_flush(pb);
|
2011-03-17 07:16:07 +00:00
|
|
|
len = avio_close_dyn_buf(pb, &buf);
|
2010-02-16 22:50:50 +00:00
|
|
|
if ((len > 0) && buf)
|
2011-03-31 14:48:01 +00:00
|
|
|
ffurl_write(rtp_handle, buf, len);
|
2010-02-16 22:50:50 +00:00
|
|
|
av_free(buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-01-04 19:33:50 +00:00
|
|
|
/**
|
|
|
|
* open a new RTP parse context for stream 'st'. 'st' can be NULL for
|
|
|
|
* MPEG2TS streams to indicate that they should be demuxed inside the
|
2012-08-05 09:11:04 +00:00
|
|
|
* rtp demux (otherwise AV_CODEC_ID_MPEG2TS packets are returned)
|
2008-01-04 19:33:50 +00:00
|
|
|
*/
|
2011-10-12 09:37:42 +00:00
|
|
|
RTPDemuxContext *ff_rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, int queue_size)
|
2008-01-04 19:33:50 +00:00
|
|
|
{
|
|
|
|
RTPDemuxContext *s;
|
|
|
|
|
|
|
|
s = av_mallocz(sizeof(RTPDemuxContext));
|
|
|
|
if (!s)
|
|
|
|
return NULL;
|
|
|
|
s->payload_type = payload_type;
|
|
|
|
s->last_rtcp_ntp_time = AV_NOPTS_VALUE;
|
2010-04-20 07:34:28 +00:00
|
|
|
s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
|
2008-01-04 19:33:50 +00:00
|
|
|
s->ic = s1;
|
|
|
|
s->st = st;
|
2010-10-01 17:50:24 +00:00
|
|
|
s->queue_size = queue_size;
|
2008-01-04 19:33:50 +00:00
|
|
|
rtp_init_statistics(&s->statistics, 0); // do we know the initial sequence from sdp?
|
|
|
|
if (!strcmp(ff_rtp_enc_name(payload_type), "MP2T")) {
|
2010-02-01 23:10:04 +00:00
|
|
|
s->ts = ff_mpegts_parse_open(s->ic);
|
2008-01-04 19:33:50 +00:00
|
|
|
if (s->ts == NULL) {
|
|
|
|
av_free(s);
|
|
|
|
return NULL;
|
|
|
|
}
|
2012-04-06 20:07:12 +00:00
|
|
|
} else if (st) {
|
2008-01-04 19:33:50 +00:00
|
|
|
switch(st->codec->codec_id) {
|
2012-08-05 09:11:04 +00:00
|
|
|
case AV_CODEC_ID_MPEG1VIDEO:
|
|
|
|
case AV_CODEC_ID_MPEG2VIDEO:
|
|
|
|
case AV_CODEC_ID_MP2:
|
|
|
|
case AV_CODEC_ID_MP3:
|
|
|
|
case AV_CODEC_ID_MPEG4:
|
|
|
|
case AV_CODEC_ID_H263:
|
|
|
|
case AV_CODEC_ID_H264:
|
2008-01-04 19:33:50 +00:00
|
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
|
|
break;
|
2012-08-05 09:11:04 +00:00
|
|
|
case AV_CODEC_ID_VORBIS:
|
2012-01-15 18:38:03 +00:00
|
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
|
|
break;
|
2012-08-05 09:11:04 +00:00
|
|
|
case AV_CODEC_ID_ADPCM_G722:
|
2010-09-15 17:35:39 +00:00
|
|
|
/* According to RFC 3551, the stream clock rate is 8000
|
|
|
|
* even if the sample rate is 16000. */
|
|
|
|
if (st->codec->sample_rate == 8000)
|
|
|
|
st->codec->sample_rate = 16000;
|
|
|
|
break;
|
2008-01-04 19:33:50 +00:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// needed to send back RTCP RR in RTSP sessions
|
|
|
|
s->rtp_ctx = rtpc;
|
|
|
|
gethostname(s->hostname, sizeof(s->hostname));
|
|
|
|
return s;
|
|
|
|
}
|
|
|
|
|
2012-10-22 12:54:25 +00:00
|
|
|
void ff_rtp_parse_set_dynamic_protocol(RTPDemuxContext *s, PayloadContext *ctx,
|
|
|
|
RTPDynamicProtocolHandler *handler)
|
2008-10-04 04:16:44 +00:00
|
|
|
{
|
|
|
|
s->dynamic_protocol_context = ctx;
|
|
|
|
s->parse_packet = handler->parse_packet;
|
|
|
|
}
|
|
|
|
|
2008-01-04 19:33:50 +00:00
|
|
|
/**
|
|
|
|
* This was the second switch in rtp_parse packet. Normalizes time, if required, sets stream_index, etc.
|
|
|
|
*/
|
|
|
|
static void finalize_packet(RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)
|
|
|
|
{
|
2011-01-06 11:33:06 +00:00
|
|
|
if (pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE)
|
|
|
|
return; /* Timestamp already set by depacketizer */
|
2011-11-09 23:28:35 +00:00
|
|
|
if (timestamp == RTP_NOTS_VALUE)
|
|
|
|
return;
|
|
|
|
|
2011-11-09 23:28:35 +00:00
|
|
|
if (s->last_rtcp_ntp_time != AV_NOPTS_VALUE && s->ic->nb_streams > 1) {
|
2008-07-02 10:26:23 +00:00
|
|
|
int64_t addend;
|
|
|
|
int delta_timestamp;
|
|
|
|
|
|
|
|
/* compute pts from timestamp with received ntp_time */
|
|
|
|
delta_timestamp = timestamp - s->last_rtcp_timestamp;
|
|
|
|
/* convert to the PTS timebase */
|
2010-04-20 07:34:28 +00:00
|
|
|
addend = av_rescale(s->last_rtcp_ntp_time - s->first_rtcp_ntp_time, s->st->time_base.den, (uint64_t)s->st->time_base.num << 32);
|
2011-01-01 22:27:16 +00:00
|
|
|
pkt->pts = s->range_start_offset + s->rtcp_ts_offset + addend +
|
|
|
|
delta_timestamp;
|
|
|
|
return;
|
2008-07-02 10:26:23 +00:00
|
|
|
}
|
2011-11-09 23:28:35 +00:00
|
|
|
|
2011-01-01 22:27:16 +00:00
|
|
|
if (!s->base_timestamp)
|
|
|
|
s->base_timestamp = timestamp;
|
2011-11-17 15:50:12 +00:00
|
|
|
/* assume that the difference is INT32_MIN < x < INT32_MAX, but allow the first timestamp to exceed INT32_MAX */
|
|
|
|
if (!s->timestamp)
|
|
|
|
s->unwrapped_timestamp += timestamp;
|
|
|
|
else
|
|
|
|
s->unwrapped_timestamp += (int32_t)(timestamp - s->timestamp);
|
|
|
|
s->timestamp = timestamp;
|
|
|
|
pkt->pts = s->unwrapped_timestamp + s->range_start_offset - s->base_timestamp;
|
2008-01-04 19:33:50 +00:00
|
|
|
}
|
|
|
|
|
2010-10-01 17:46:10 +00:00
|
|
|
static int rtp_parse_packet_internal(RTPDemuxContext *s, AVPacket *pkt,
|
|
|
|
const uint8_t *buf, int len)
|
2008-01-04 19:33:50 +00:00
|
|
|
{
|
|
|
|
unsigned int ssrc, h;
|
2008-01-18 20:48:32 +00:00
|
|
|
int payload_type, seq, ret, flags = 0;
|
2010-10-06 16:59:14 +00:00
|
|
|
int ext;
|
2008-01-04 19:33:50 +00:00
|
|
|
AVStream *st;
|
|
|
|
uint32_t timestamp;
|
|
|
|
int rv= 0;
|
|
|
|
|
2010-10-06 16:59:14 +00:00
|
|
|
ext = buf[0] & 0x10;
|
2008-01-04 19:33:50 +00:00
|
|
|
payload_type = buf[1] & 0x7f;
|
2009-02-26 14:24:50 +00:00
|
|
|
if (buf[1] & 0x80)
|
|
|
|
flags |= RTP_FLAG_MARKER;
|
2008-01-04 19:33:50 +00:00
|
|
|
seq = AV_RB16(buf + 2);
|
|
|
|
timestamp = AV_RB32(buf + 4);
|
|
|
|
ssrc = AV_RB32(buf + 8);
|
|
|
|
/* store the ssrc in the RTPDemuxContext */
|
|
|
|
s->ssrc = ssrc;
|
|
|
|
|
|
|
|
/* NOTE: we can handle only one payload type */
|
|
|
|
if (s->payload_type != payload_type)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
st = s->st;
|
|
|
|
// only do something with this if all the rtp checks pass...
|
|
|
|
if(!rtp_valid_packet_in_sequence(&s->statistics, seq))
|
|
|
|
{
|
|
|
|
av_log(st?st->codec:NULL, AV_LOG_ERROR, "RTP: PT=%02x: bad cseq %04x expected=%04x\n",
|
|
|
|
payload_type, seq, ((s->seq + 1) & 0xffff));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2010-12-06 12:43:38 +00:00
|
|
|
if (buf[0] & 0x20) {
|
|
|
|
int padding = buf[len - 1];
|
|
|
|
if (len >= 12 + padding)
|
|
|
|
len -= padding;
|
|
|
|
}
|
|
|
|
|
2008-01-04 19:33:50 +00:00
|
|
|
s->seq = seq;
|
|
|
|
len -= 12;
|
|
|
|
buf += 12;
|
|
|
|
|
2010-10-06 16:59:14 +00:00
|
|
|
/* RFC 3550 Section 5.3.1 RTP Header Extension handling */
|
|
|
|
if (ext) {
|
|
|
|
if (len < 4)
|
|
|
|
return -1;
|
|
|
|
/* calculate the header extension length (stored as number
|
|
|
|
* of 32-bit words) */
|
|
|
|
ext = (AV_RB16(buf + 2) + 1) << 2;
|
|
|
|
|
|
|
|
if (len < ext)
|
|
|
|
return -1;
|
|
|
|
// skip past RTP header extension
|
|
|
|
len -= ext;
|
|
|
|
buf += ext;
|
|
|
|
}
|
|
|
|
|
2008-01-04 19:33:50 +00:00
|
|
|
if (!st) {
|
|
|
|
/* specific MPEG2TS demux support */
|
2010-02-01 23:10:04 +00:00
|
|
|
ret = ff_mpegts_parse_packet(s->ts, pkt, buf, len);
|
2010-10-15 21:32:21 +00:00
|
|
|
/* The only error that can be returned from ff_mpegts_parse_packet
|
|
|
|
* is "no more data to return from the provided buffer", so return
|
|
|
|
* AVERROR(EAGAIN) for all errors */
|
2010-10-13 08:12:23 +00:00
|
|
|
if (ret < 0)
|
2010-10-15 21:32:21 +00:00
|
|
|
return AVERROR(EAGAIN);
|
2008-01-04 19:33:50 +00:00
|
|
|
if (ret < len) {
|
|
|
|
s->read_buf_size = len - ret;
|
|
|
|
memcpy(s->buf, buf + ret, s->read_buf_size);
|
|
|
|
s->read_buf_index = 0;
|
|
|
|
return 1;
|
|
|
|
}
|
2009-03-03 13:41:50 +00:00
|
|
|
return 0;
|
2008-01-10 13:52:35 +00:00
|
|
|
} else if (s->parse_packet) {
|
2009-02-06 01:37:19 +00:00
|
|
|
rv = s->parse_packet(s->ic, s->dynamic_protocol_context,
|
2008-10-04 04:15:06 +00:00
|
|
|
s->st, pkt, ×tamp, buf, len, flags);
|
2008-01-04 19:33:50 +00:00
|
|
|
} else {
|
|
|
|
// at this point, the RTP header has been stripped; This is ASSUMING that there is only 1 CSRC, which in't wise.
|
|
|
|
switch(st->codec->codec_id) {
|
2012-08-05 09:11:04 +00:00
|
|
|
case AV_CODEC_ID_MP2:
|
|
|
|
case AV_CODEC_ID_MP3:
|
2008-01-04 19:33:50 +00:00
|
|
|
/* better than nothing: skip mpeg audio RTP header */
|
|
|
|
if (len <= 4)
|
|
|
|
return -1;
|
|
|
|
h = AV_RB32(buf);
|
|
|
|
len -= 4;
|
|
|
|
buf += 4;
|
|
|
|
av_new_packet(pkt, len);
|
|
|
|
memcpy(pkt->data, buf, len);
|
|
|
|
break;
|
2012-08-05 09:11:04 +00:00
|
|
|
case AV_CODEC_ID_MPEG1VIDEO:
|
|
|
|
case AV_CODEC_ID_MPEG2VIDEO:
|
2008-01-04 19:33:50 +00:00
|
|
|
/* better than nothing: skip mpeg video RTP header */
|
|
|
|
if (len <= 4)
|
|
|
|
return -1;
|
|
|
|
h = AV_RB32(buf);
|
|
|
|
buf += 4;
|
|
|
|
len -= 4;
|
|
|
|
if (h & (1 << 26)) {
|
|
|
|
/* mpeg2 */
|
|
|
|
if (len <= 4)
|
|
|
|
return -1;
|
|
|
|
buf += 4;
|
|
|
|
len -= 4;
|
|
|
|
}
|
|
|
|
av_new_packet(pkt, len);
|
|
|
|
memcpy(pkt->data, buf, len);
|
|
|
|
break;
|
|
|
|
default:
|
2008-01-10 13:54:30 +00:00
|
|
|
av_new_packet(pkt, len);
|
|
|
|
memcpy(pkt->data, buf, len);
|
2008-01-04 19:33:50 +00:00
|
|
|
break;
|
|
|
|
}
|
2009-03-03 13:51:34 +00:00
|
|
|
|
|
|
|
pkt->stream_index = st->index;
|
2009-03-03 13:41:50 +00:00
|
|
|
}
|
2008-01-04 19:33:50 +00:00
|
|
|
|
2009-03-03 13:42:16 +00:00
|
|
|
// now perform timestamp things....
|
|
|
|
finalize_packet(s, pkt, timestamp);
|
2009-03-03 13:41:50 +00:00
|
|
|
|
2008-01-04 19:33:50 +00:00
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
2010-10-01 17:50:24 +00:00
|
|
|
void ff_rtp_reset_packet_queue(RTPDemuxContext *s)
|
|
|
|
{
|
|
|
|
while (s->queue) {
|
|
|
|
RTPPacket *next = s->queue->next;
|
|
|
|
av_free(s->queue->buf);
|
|
|
|
av_free(s->queue);
|
|
|
|
s->queue = next;
|
|
|
|
}
|
|
|
|
s->seq = 0;
|
|
|
|
s->queue_len = 0;
|
|
|
|
s->prev_ret = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
|
|
|
|
{
|
|
|
|
uint16_t seq = AV_RB16(buf + 2);
|
|
|
|
RTPPacket *cur = s->queue, *prev = NULL, *packet;
|
|
|
|
|
|
|
|
/* Find the correct place in the queue to insert the packet */
|
|
|
|
while (cur) {
|
|
|
|
int16_t diff = seq - cur->seq;
|
|
|
|
if (diff < 0)
|
|
|
|
break;
|
|
|
|
prev = cur;
|
|
|
|
cur = cur->next;
|
|
|
|
}
|
|
|
|
|
|
|
|
packet = av_mallocz(sizeof(*packet));
|
|
|
|
if (!packet)
|
|
|
|
return;
|
|
|
|
packet->recvtime = av_gettime();
|
|
|
|
packet->seq = seq;
|
|
|
|
packet->len = len;
|
|
|
|
packet->buf = buf;
|
|
|
|
packet->next = cur;
|
|
|
|
if (prev)
|
|
|
|
prev->next = packet;
|
|
|
|
else
|
|
|
|
s->queue = packet;
|
|
|
|
s->queue_len++;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int has_next_packet(RTPDemuxContext *s)
|
|
|
|
{
|
2010-10-13 08:15:39 +00:00
|
|
|
return s->queue && s->queue->seq == (uint16_t) (s->seq + 1);
|
2010-10-01 17:50:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int64_t ff_rtp_queued_packet_time(RTPDemuxContext *s)
|
|
|
|
{
|
|
|
|
return s->queue ? s->queue->recvtime : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rtp_parse_queued_packet(RTPDemuxContext *s, AVPacket *pkt)
|
|
|
|
{
|
|
|
|
int rv;
|
|
|
|
RTPPacket *next;
|
|
|
|
|
|
|
|
if (s->queue_len <= 0)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (!has_next_packet(s))
|
|
|
|
av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
|
|
|
|
"RTP: missed %d packets\n", s->queue->seq - s->seq - 1);
|
|
|
|
|
|
|
|
/* Parse the first packet in the queue, and dequeue it */
|
|
|
|
rv = rtp_parse_packet_internal(s, pkt, s->queue->buf, s->queue->len);
|
|
|
|
next = s->queue->next;
|
|
|
|
av_free(s->queue->buf);
|
|
|
|
av_free(s->queue);
|
|
|
|
s->queue = next;
|
|
|
|
s->queue_len--;
|
2010-10-13 08:12:23 +00:00
|
|
|
return rv;
|
2010-10-01 17:50:24 +00:00
|
|
|
}
|
|
|
|
|
2010-10-13 08:12:23 +00:00
|
|
|
static int rtp_parse_one_packet(RTPDemuxContext *s, AVPacket *pkt,
|
2012-10-22 12:54:25 +00:00
|
|
|
uint8_t **bufptr, int len)
|
2010-10-01 17:46:10 +00:00
|
|
|
{
|
|
|
|
uint8_t* buf = bufptr ? *bufptr : NULL;
|
|
|
|
int ret, flags = 0;
|
|
|
|
uint32_t timestamp;
|
|
|
|
int rv= 0;
|
|
|
|
|
|
|
|
if (!buf) {
|
2010-10-13 08:13:07 +00:00
|
|
|
/* If parsing of the previous packet actually returned 0 or an error,
|
|
|
|
* there's nothing more to be parsed from that packet, but we may have
|
2010-10-01 17:50:24 +00:00
|
|
|
* indicated that we can return the next enqueued packet. */
|
2010-10-13 08:13:07 +00:00
|
|
|
if (s->prev_ret <= 0)
|
2010-10-01 17:50:24 +00:00
|
|
|
return rtp_parse_queued_packet(s, pkt);
|
2010-10-01 17:46:10 +00:00
|
|
|
/* return the next packets, if any */
|
|
|
|
if(s->st && s->parse_packet) {
|
|
|
|
/* timestamp should be overwritten by parse_packet, if not,
|
|
|
|
* the packet is left with pts == AV_NOPTS_VALUE */
|
|
|
|
timestamp = RTP_NOTS_VALUE;
|
|
|
|
rv= s->parse_packet(s->ic, s->dynamic_protocol_context,
|
|
|
|
s->st, pkt, ×tamp, NULL, 0, flags);
|
|
|
|
finalize_packet(s, pkt, timestamp);
|
2010-10-13 08:12:23 +00:00
|
|
|
return rv;
|
2010-10-01 17:46:10 +00:00
|
|
|
} else {
|
|
|
|
// TODO: Move to a dynamic packet handler (like above)
|
2010-10-13 08:12:23 +00:00
|
|
|
if (s->read_buf_index >= s->read_buf_size)
|
2010-10-13 08:13:53 +00:00
|
|
|
return AVERROR(EAGAIN);
|
2010-10-01 17:46:10 +00:00
|
|
|
ret = ff_mpegts_parse_packet(s->ts, pkt, s->buf + s->read_buf_index,
|
|
|
|
s->read_buf_size - s->read_buf_index);
|
2010-10-13 08:12:23 +00:00
|
|
|
if (ret < 0)
|
2010-10-15 21:32:21 +00:00
|
|
|
return AVERROR(EAGAIN);
|
2010-10-01 17:46:10 +00:00
|
|
|
s->read_buf_index += ret;
|
|
|
|
if (s->read_buf_index < s->read_buf_size)
|
|
|
|
return 1;
|
2010-10-13 08:12:23 +00:00
|
|
|
else
|
|
|
|
return 0;
|
2010-10-01 17:46:10 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (len < 12)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
|
|
|
|
return -1;
|
2012-02-16 16:31:03 +00:00
|
|
|
if (RTP_PT_IS_RTCP(buf[1])) {
|
2010-10-01 17:46:10 +00:00
|
|
|
return rtcp_parse_packet(s, buf, len);
|
|
|
|
}
|
|
|
|
|
2010-10-13 08:47:34 +00:00
|
|
|
if ((s->seq == 0 && !s->queue) || s->queue_size <= 1) {
|
2010-10-01 17:50:24 +00:00
|
|
|
/* First packet, or no reordering */
|
|
|
|
return rtp_parse_packet_internal(s, pkt, buf, len);
|
|
|
|
} else {
|
|
|
|
uint16_t seq = AV_RB16(buf + 2);
|
|
|
|
int16_t diff = seq - s->seq;
|
|
|
|
if (diff < 0) {
|
|
|
|
/* Packet older than the previously emitted one, drop */
|
|
|
|
av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
|
|
|
|
"RTP: dropping old packet received too late\n");
|
|
|
|
return -1;
|
|
|
|
} else if (diff <= 1) {
|
|
|
|
/* Correct packet */
|
|
|
|
rv = rtp_parse_packet_internal(s, pkt, buf, len);
|
2010-10-13 08:12:23 +00:00
|
|
|
return rv;
|
2010-10-01 17:50:24 +00:00
|
|
|
} else {
|
|
|
|
/* Still missing some packet, enqueue this one. */
|
|
|
|
enqueue_packet(s, buf, len);
|
|
|
|
*bufptr = NULL;
|
|
|
|
/* Return the first enqueued packet if the queue is full,
|
|
|
|
* even if we're missing something */
|
|
|
|
if (s->queue_len >= s->queue_size)
|
|
|
|
return rtp_parse_queued_packet(s, pkt);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
2010-10-01 17:46:10 +00:00
|
|
|
}
|
|
|
|
|
2010-10-13 08:12:23 +00:00
|
|
|
/**
|
|
|
|
* Parse an RTP or RTCP packet directly sent as a buffer.
|
|
|
|
* @param s RTP parse context.
|
|
|
|
* @param pkt returned packet
|
|
|
|
* @param bufptr pointer to the input buffer or NULL to read the next packets
|
|
|
|
* @param len buffer len
|
|
|
|
* @return 0 if a packet is returned, 1 if a packet is returned and more can follow
|
|
|
|
* (use buf as NULL to read the next). -1 if no packet (error or no more packet).
|
|
|
|
*/
|
2011-10-12 09:37:42 +00:00
|
|
|
int ff_rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
|
|
|
|
uint8_t **bufptr, int len)
|
2010-10-13 08:12:23 +00:00
|
|
|
{
|
|
|
|
int rv = rtp_parse_one_packet(s, pkt, bufptr, len);
|
|
|
|
s->prev_ret = rv;
|
2010-10-13 08:14:30 +00:00
|
|
|
while (rv == AVERROR(EAGAIN) && has_next_packet(s))
|
|
|
|
rv = rtp_parse_queued_packet(s, pkt);
|
2010-10-13 08:12:23 +00:00
|
|
|
return rv ? rv : has_next_packet(s);
|
|
|
|
}
|
|
|
|
|
2011-10-12 09:37:42 +00:00
|
|
|
void ff_rtp_parse_close(RTPDemuxContext *s)
|
2008-01-04 19:33:50 +00:00
|
|
|
{
|
2010-10-01 17:50:24 +00:00
|
|
|
ff_rtp_reset_packet_queue(s);
|
2008-01-04 19:33:50 +00:00
|
|
|
if (!strcmp(ff_rtp_enc_name(s->payload_type), "MP2T")) {
|
2010-02-01 23:10:04 +00:00
|
|
|
ff_mpegts_parse_close(s->ts);
|
2008-01-04 19:33:50 +00:00
|
|
|
}
|
|
|
|
av_free(s);
|
|
|
|
}
|
2010-06-28 11:24:12 +00:00
|
|
|
|
|
|
|
int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
|
|
|
|
int (*parse_fmtp)(AVStream *stream,
|
|
|
|
PayloadContext *data,
|
|
|
|
char *attr, char *value))
|
|
|
|
{
|
|
|
|
char attr[256];
|
2010-06-28 20:27:25 +00:00
|
|
|
char *value;
|
2010-06-28 11:24:12 +00:00
|
|
|
int res;
|
2010-06-28 20:27:25 +00:00
|
|
|
int value_size = strlen(p) + 1;
|
|
|
|
|
|
|
|
if (!(value = av_malloc(value_size))) {
|
2012-10-20 20:29:15 +00:00
|
|
|
av_log(NULL, AV_LOG_ERROR, "Failed to allocate data for FMTP.");
|
2010-06-28 20:27:25 +00:00
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
2010-06-28 11:24:12 +00:00
|
|
|
|
|
|
|
// remove protocol identifier
|
|
|
|
while (*p && *p == ' ') p++; // strip spaces
|
|
|
|
while (*p && *p != ' ') p++; // eat protocol identifier
|
|
|
|
while (*p && *p == ' ') p++; // strip trailing spaces
|
|
|
|
|
|
|
|
while (ff_rtsp_next_attr_and_value(&p,
|
|
|
|
attr, sizeof(attr),
|
2010-06-28 20:27:25 +00:00
|
|
|
value, value_size)) {
|
2010-06-28 11:24:12 +00:00
|
|
|
|
|
|
|
res = parse_fmtp(stream, data, attr, value);
|
2010-06-28 20:27:25 +00:00
|
|
|
if (res < 0 && res != AVERROR_PATCHWELCOME) {
|
|
|
|
av_free(value);
|
2010-06-28 11:24:12 +00:00
|
|
|
return res;
|
2010-06-28 20:27:25 +00:00
|
|
|
}
|
2010-06-28 11:24:12 +00:00
|
|
|
}
|
2010-06-28 20:27:25 +00:00
|
|
|
av_free(value);
|
2010-06-28 11:24:12 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2012-11-01 13:03:04 +00:00
|
|
|
|
|
|
|
int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx)
|
|
|
|
{
|
|
|
|
av_init_packet(pkt);
|
|
|
|
|
|
|
|
pkt->size = avio_close_dyn_buf(*dyn_buf, &pkt->data);
|
|
|
|
pkt->stream_index = stream_idx;
|
|
|
|
pkt->destruct = av_destruct_packet;
|
|
|
|
*dyn_buf = NULL;
|
|
|
|
return pkt->size;
|
|
|
|
}
|