mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
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296 lines
6.7 KiB
C++
296 lines
6.7 KiB
C++
//
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// Created by xzl on 2018/10/18.
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//
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#ifndef ZLMEDIAKIT_FRAME_H
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#define ZLMEDIAKIT_FRAME_H
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#include "Util/RingBuffer.h"
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#include "Network/Socket.h"
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using namespace ZL::Util;
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using namespace ZL::Network;
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typedef enum {
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CodecInvalid = -1,
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CodecH264 = 0,
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CodecAAC = 0x0100,
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CodecMax
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} CodecId;
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typedef enum {
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TrackInvalid = -1,
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TrackVideo = 0,
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TrackAudio,
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TrackMax
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} TrackType;
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class CodecInfo {
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public:
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typedef std::shared_ptr<CodecInfo> Ptr;
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CodecInfo(){}
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virtual ~CodecInfo(){}
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/**
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* 获取音视频类型
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*/
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virtual TrackType getTrackType() const = 0;
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/**
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* 获取编解码器类型
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*/
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virtual CodecId getCodecId() const = 0;
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};
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class Frame : public Buffer, public CodecInfo{
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public:
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typedef std::shared_ptr<Frame> Ptr;
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virtual ~Frame(){}
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/**
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* 时间戳
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*/
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virtual uint32_t stamp() const = 0;
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/**
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* 前缀长度，譬如264前缀为0x00 00 00 01,那么前缀长度就是4
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* aac前缀则为7个字节
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*/
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virtual uint32_t prefixSize() const = 0;
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/**
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* 返回是否为关键帧
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* @return
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*/
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virtual bool keyFrame() const = 0;
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};
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template <typename T>
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class ResourcePoolHelper{
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public:
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ResourcePoolHelper(int size = 8){
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_pool.setSize(size);
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}
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virtual ~ResourcePoolHelper(){}
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std::shared_ptr<T> obtainObj(){
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return _pool.obtain();
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}
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private:
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ResourcePool<T> _pool;
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};
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/**
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* 帧环形缓存接口类
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*/
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class FrameRingInterface {
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public:
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typedef RingBuffer<Frame::Ptr> RingType;
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typedef std::shared_ptr<FrameRingInterface> Ptr;
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FrameRingInterface(){}
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virtual ~FrameRingInterface(){}
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/**
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* 获取帧环形缓存
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* @return
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*/
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virtual RingType::Ptr getFrameRing() const = 0;
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/**
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* 设置帧环形缓存
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* @param ring
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*/
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virtual void setFrameRing(const RingType::Ptr &ring) = 0;
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/**
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* 写入帧数据
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* @param frame 帧
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*/
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virtual void inputFrame(const Frame::Ptr &frame) = 0;
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};
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class FrameRing : public FrameRingInterface{
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public:
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typedef std::shared_ptr<FrameRing> Ptr;
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FrameRing(){
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_frameRing = std::make_shared<RingType>();
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}
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virtual ~FrameRing(){}
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/**
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* 获取帧环形缓存
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* @return
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*/
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RingType::Ptr getFrameRing() const override {
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return _frameRing;
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}
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/**
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* 设置帧环形缓存
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* @param ring
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*/
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void setFrameRing(const RingType::Ptr &ring) override {
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_frameRing = ring;
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}
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/**
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* 输入数据帧
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* @param frame
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*/
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void inputFrame(const Frame::Ptr &frame) override{
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_frameRing->write(frame,frame->keyFrame());
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}
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protected:
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RingType::Ptr _frameRing;
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};
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class FrameRingInterfaceDelegate : public FrameRingInterface {
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public:
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typedef std::shared_ptr<FrameRingInterfaceDelegate> Ptr;
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FrameRingInterfaceDelegate(){
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_delegate = std::make_shared<FrameRing>();
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}
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virtual ~FrameRingInterfaceDelegate(){}
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void setDelegate(const FrameRingInterface::Ptr &delegate){
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_delegate = delegate;
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}
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/**
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* 获取帧环形缓存
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* @return
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*/
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FrameRingInterface::RingType::Ptr getFrameRing() const override {
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if(_delegate){
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return _delegate->getFrameRing();
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}
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return nullptr;
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}
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/**
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* 设置帧环形缓存
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* @param ring
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*/
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void setFrameRing(const FrameRingInterface::RingType::Ptr &ring) override {
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if(_delegate){
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_delegate->setFrameRing(ring);
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}
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}
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/**
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* 写入帧数据
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* @param frame 帧
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*/
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void inputFrame(const Frame::Ptr &frame) override{
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if(_delegate){
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_delegate->inputFrame(frame);
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}
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}
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private:
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FrameRingInterface::Ptr _delegate;
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};
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/**
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* 264帧类
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*/
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class H264Frame : public Frame {
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public:
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typedef std::shared_ptr<H264Frame> Ptr;
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char *data() const override{
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return (char *)buffer.data();
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}
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uint32_t size() const override {
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return buffer.size();
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}
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uint32_t stamp() const override {
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return timeStamp;
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}
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uint32_t prefixSize() const override{
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return iPrefixSize;
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}
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TrackType getTrackType() const override{
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return TrackVideo;
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}
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CodecId getCodecId() const override{
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return CodecH264;
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}
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bool keyFrame() const override {
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return type == 5;
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}
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public:
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uint16_t sequence;
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uint32_t timeStamp;
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unsigned char type;
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string buffer;
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uint32_t iPrefixSize = 4;
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};
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/**
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* aac帧，包含adts头
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*/
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class AACFrame : public Frame {
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public:
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typedef std::shared_ptr<AACFrame> Ptr;
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char *data() const override{
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return (char *)buffer;
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}
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uint32_t size() const override {
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return aac_frame_length;
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}
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uint32_t stamp() const override {
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return timeStamp;
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}
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uint32_t prefixSize() const override{
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return iPrefixSize;
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}
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TrackType getTrackType() const override{
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return TrackAudio;
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}
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CodecId getCodecId() const override{
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return CodecAAC;
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}
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bool keyFrame() const override {
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return false;
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}
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public:
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unsigned int syncword; //12 bslbf 同步字The bit string ‘1111 1111 1111’，说明一个ADTS帧的开始
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unsigned int id; //1 bslbf MPEG 标示符, 设置为1
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unsigned int layer; //2 uimsbf Indicates which layer is used. Set to ‘00’
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unsigned int protection_absent; //1 bslbf 表示是否误码校验
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unsigned int profile; //2 uimsbf 表示使用哪个级别的AAC，如01 Low Complexity(LC)--- AACLC
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unsigned int sf_index; //4 uimsbf 表示使用的采样率下标
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unsigned int private_bit; //1 bslbf
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unsigned int channel_configuration; //3 uimsbf 表示声道数
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unsigned int original; //1 bslbf
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unsigned int home; //1 bslbf
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//下面的为改变的参数即每一帧都不同
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unsigned int copyright_identification_bit; //1 bslbf
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unsigned int copyright_identification_start; //1 bslbf
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unsigned int aac_frame_length; // 13 bslbf 一个ADTS帧的长度包括ADTS头和raw data block
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unsigned int adts_buffer_fullness; //11 bslbf 0x7FF 说明是码率可变的码流
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//no_raw_data_blocks_in_frame 表示ADTS帧中有number_of_raw_data_blocks_in_frame + 1个AAC原始帧.
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//所以说number_of_raw_data_blocks_in_frame == 0
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//表示说ADTS帧中有一个AAC数据块并不是说没有。(一个AAC原始帧包含一段时间内1024个采样及相关数据)
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unsigned int no_raw_data_blocks_in_frame; //2 uimsfb
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unsigned char buffer[2 * 1024 + 7];
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uint16_t sequence;
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uint32_t timeStamp;
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uint32_t iPrefixSize = 4;
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} ;
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#endif //ZLMEDIAKIT_FRAME_H
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