/* * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved. * * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit). * * Use of this source code is governed by MIT 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_MEDIASINK_H #define ZLMEDIAKIT_MEDIASINK_H #include #include #include "Util/TimeTicker.h" #include "Extension/Frame.h" #include "Extension/Track.h" using namespace std; using namespace toolkit; namespace mediakit{ class TrackListener { public: TrackListener() = default; virtual ~TrackListener() = default; /** * 添加track,内部会调用Track的clone方法 * 只会克隆sps pps这些信息 ,而不会克隆Delegate相关关系 * @param track */ virtual bool addTrack(const Track::Ptr & track) = 0; /** * 添加track完毕 */ virtual void addTrackCompleted() {}; /** * 重置track */ virtual void resetTracks() {}; }; class MediaSinkInterface : public FrameWriterInterface, public TrackListener { public: typedef std::shared_ptr Ptr; MediaSinkInterface() = default; ~MediaSinkInterface() override = default; }; /** * aac静音音频添加器 */ class MuteAudioMaker : public FrameDispatcher { public: typedef std::shared_ptr Ptr; MuteAudioMaker() = default; ~MuteAudioMaker() override = default; bool inputFrame(const Frame::Ptr &frame) override; private: uint32_t _audio_idx = 0; }; /** * 该类的作用是等待Track ready()返回true也就是就绪后再通知派生类进行下一步的操作 * 目的是输入Frame前由Track截取处理下,以便获取有效的信息(譬如sps pps aa_cfg) */ class MediaSink : public MediaSinkInterface, public TrackSource{ public: typedef std::shared_ptr Ptr; MediaSink() = default; ~MediaSink() override = default; /** * 输入frame * @param frame */ bool inputFrame(const Frame::Ptr &frame) override; /** * 添加track,内部会调用Track的clone方法 * 只会克隆sps pps这些信息 ,而不会克隆Delegate相关关系 * @param track */ bool addTrack(const Track::Ptr & track) override; /** * 添加Track完毕,如果是单Track,会最多等待3秒才会触发onAllTrackReady * 这样会增加生成流的延时,如果添加了音视频双Track,那么可以不调用此方法 * 否则为了降低流注册延时,请手动调用此方法 */ void addTrackCompleted() override; /** * 重置track */ void resetTracks() override; /** * 获取所有Track * @param trackReady 是否获取已经准备好的Track */ vector getTracks(bool trackReady = true) const override; /** * 添加aac静音轨道 */ bool addMuteAudioTrack(); protected: /** * 某track已经准备好,其ready()状态返回true, * 此时代表可以获取其例如sps pps等相关信息了 * @param track */ virtual bool onTrackReady(const Track::Ptr & track) { return false; }; /** * 所有Track已经准备好, */ virtual void onAllTrackReady() {}; /** * 某Track输出frame,在onAllTrackReady触发后才会调用此方法 * @param frame */ virtual bool onTrackFrame(const Frame::Ptr &frame) { return false; }; private: /** * 触发onAllTrackReady事件 */ void emitAllTrackReady(); /** * 检查track是否准备完毕 */ void checkTrackIfReady(); void onAllTrackReady_l(); private: bool _all_track_ready = false; size_t _max_track_size = 2; unordered_map > _track_map; unordered_map > _frame_unread; unordered_map > _track_ready_callback; Ticker _ticker; MuteAudioMaker::Ptr _mute_audio_maker; }; }//namespace mediakit #endif //ZLMEDIAKIT_MEDIASINK_H