103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
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/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#if defined(ENABLE_RTPPROXY)
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#include <string.h>
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#include "RtpSplitter.h"
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namespace mediakit{
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static const int kEHOME_OFFSET = 256;
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ssize_t RtpSplitter::onRecvHeader(const char *data,size_t len){
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// 忽略偏移量 [AUTO-TRANSLATED:7fbc3d5d]
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// Ignore offset
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data += _offset;
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len -= _offset;
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if (_is_ehome && len > 12 && data[12] == '\r') {
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// 这是ehome,移除第12个字节 [AUTO-TRANSLATED:643b3f39]
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// This is ehome, remove the 12th byte
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memmove((char *) data + 1, data, 12);
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data += 1;
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len -= 1;
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}
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onRtpPacket(data, len);
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return 0;
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}
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static bool isEhome(const char *data, size_t len){
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if (len < 4) {
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return false;
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}
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if ((data[0] == 0x01) && (data[1] == 0x00) && (data[2] >= 0x01)) {
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return true;
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}
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return false;
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}
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const char *RtpSplitter::onSearchPacketTail(const char *data, size_t len) {
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if (len < 4) {
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// 数据不够 [AUTO-TRANSLATED:72802244]
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// Not enough data
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return nullptr;
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}
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if (_check_ehome_count) {
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if (isEhome(data, len)) {
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// 是ehome协议 [AUTO-TRANSLATED:daa874ca]
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// It is the ehome protocol
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if (len < kEHOME_OFFSET + 4) {
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// 数据不够 [AUTO-TRANSLATED:72802244]
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// Not enough data
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return nullptr;
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}
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// 忽略ehome私有头后是rtsp样式的rtp，多4个字节， [AUTO-TRANSLATED:d9bc652c]
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// Ignore the ehome private header, then it is an rtsp-style rtp, with 4 extra bytes,
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_offset = kEHOME_OFFSET + 4;
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_is_ehome = true;
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// 忽略ehome私有头 [AUTO-TRANSLATED:4fc98661]
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// Ignore the ehome private header
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return onSearchPacketTail_l(data + kEHOME_OFFSET + 2, len - kEHOME_OFFSET - 2);
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}
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_check_ehome_count--;
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}
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if ( _is_rtsp_interleaved ) {
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if (data[0] == '$') {
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// 可能是4个字节的rtp头 [AUTO-TRANSLATED:c287c3cb]
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// It may be a 4-byte rtp header
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_offset = 4;
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return onSearchPacketTail_l(data + 2, len - 2);
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}
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_is_rtsp_interleaved = false;
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}
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// 两个字节的rtp头 [AUTO-TRANSLATED:85fed462]
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// A 2-byte rtp header
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_offset = 2;
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return onSearchPacketTail_l(data, len);
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}
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const char *RtpSplitter::onSearchPacketTail_l(const char *data, size_t len) {
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// 这是rtp包 [AUTO-TRANSLATED:627d4881]
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// This is an rtp packet
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uint16_t length = (((uint8_t *) data)[0] << 8) | ((uint8_t *) data)[1];
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if (len < (size_t)(length + 2)) {
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// 数据不够 [AUTO-TRANSLATED:72802244]
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// Not enough data
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return nullptr;
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}
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// 返回rtp包末尾 [AUTO-TRANSLATED:2546d5ce]
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// Return the end of the rtp packet
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return data + 2 + length;
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}
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}//namespace mediakit
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#endif//defined(ENABLE_RTPPROXY)
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