mirror of
https://gitee.com/xia-chu/ZLMediaKit.git
synced 2026-05-06 10:57:50 +08:00
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
|
|
*
|
|
* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
|
|
*
|
|
* Use of this source code is governed by MIT-like license that can be found in the
|
|
* LICENSE file in the root of the source tree. All contributing project authors
|
|
* may be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef ZLMEDIAKIT_MP2ARTP_H
|
|
#define ZLMEDIAKIT_MP2ARTP_H
|
|
|
|
#include "MP2A.h"
|
|
#include "Rtsp/RtpCodec.h"
|
|
|
|
namespace mediakit {
|
|
|
|
// RFC 2250 Section 3.5 MPEG Audio-specific header (4 bytes)
|
|
//
|
|
// 0 1 2 3
|
|
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
// | MBZ | Frag_offset |
|
|
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
//
|
|
// MBZ: Must Be Zero (16 bits)
|
|
// Frag_offset: Byte offset into the audio frame for the data in this packet (16 bits)
|
|
|
|
static constexpr size_t kMP2AHeaderSize = 4;
|
|
|
|
/**
|
|
* MP2A (MPEG-1/2 Audio Layer I/II) RTP 编码器
|
|
* RFC 2250 Section 3.5
|
|
*/
|
|
class MP2ARtpEncoder : public RtpCodec {
|
|
public:
|
|
using Ptr = std::shared_ptr<MP2ARtpEncoder>;
|
|
|
|
/**
|
|
* 输入 MPEG Audio 帧并打包为 RTP
|
|
* @param frame 帧数据
|
|
*/
|
|
bool inputFrame(const Frame::Ptr &frame) override;
|
|
|
|
private:
|
|
/**
|
|
* 输出一个 RTP 包
|
|
* @param data ES 数据
|
|
* @param len 数据长度
|
|
* @param frag_offset 分片在帧内的偏移
|
|
* @param mark 是否为帧最后一个包
|
|
* @param stamp 时间戳(ms)
|
|
*/
|
|
void outputRtp(const char *data, size_t len, size_t frag_offset, bool mark, uint64_t stamp);
|
|
};
|
|
|
|
/**
|
|
* MP2A (MPEG-1/2 Audio Layer I/II) RTP 解码器
|
|
* RFC 2250 Section 3.5
|
|
*/
|
|
class MP2ARtpDecoder : public RtpCodec {
|
|
public:
|
|
using Ptr = std::shared_ptr<MP2ARtpDecoder>;
|
|
|
|
MP2ARtpDecoder();
|
|
|
|
/**
|
|
* 输入 MPEG Audio RTP 包并解码
|
|
* @param rtp rtp 数据包
|
|
* @param key_pos 音频帧忽略此参数
|
|
*/
|
|
bool inputRtp(const RtpPacket::Ptr &rtp, bool key_pos = false) override;
|
|
|
|
private:
|
|
void obtainFrame();
|
|
void flushData();
|
|
|
|
private:
|
|
uint16_t _last_seq = 0;
|
|
uint32_t _last_stamp = 0;
|
|
FrameImp::Ptr _frame;
|
|
};
|
|
|
|
} // namespace mediakit
|
|
|
|
#endif // ZLMEDIAKIT_MP2ARTP_H
|