Adding new features for proxy player (#2448)

Add some functions for the proxy player, such as:
getting stream information (basic video/audio information)
callbacks for any connection and disconnection from the server
And now you can set delay between reconnections. See proxy player
constructor

src/Player/PlayerProxy.cpp

@@ -25,7 +25,8 @@ using namespace std;
 namespace mediakit {
 
 PlayerProxy::PlayerProxy(
-    const string &vhost, const string &app, const string &stream_id, const ProtocolOption &option, int retry_count, const EventPoller::Ptr &poller)
+    const string &vhost, const string &app, const string &stream_id, const ProtocolOption &option, int retry_count,
+    const EventPoller::Ptr &poller, int reconnect_delay_min, int reconnect_delay_max, int reconnect_delay_step)
     : MediaPlayer(poller)
     , _option(option) {
     _vhost = vhost;
@@ -33,6 +34,12 @@ PlayerProxy::PlayerProxy(
     _stream_id = stream_id;
     _retry_count = retry_count;
 
+    setOnConnect(nullptr);
+    setOnDisconnect(nullptr);
+    
+    _reconnect_delay_min = reconnect_delay_min > 0 ? reconnect_delay_min : 2;
+    _reconnect_delay_max = reconnect_delay_max > 0 ? reconnect_delay_max : 60;
+    _reconnect_delay_step = reconnect_delay_step > 0 ? reconnect_delay_step : 3;
     _live_secs = 0;
     _live_status = 1;
     _repull_count = 0;
@@ -48,6 +55,47 @@ void PlayerProxy::setOnClose(const function<void(const SockException &ex)> &cb)
     _on_close = cb ? cb : [](const SockException &) {};
 }
 
+void PlayerProxy::setOnDisconnect(std::function<void()> cb) {
+    _on_disconnect = cb ? std::move(cb) : [] () {};
+}
+
+void PlayerProxy::setOnConnect(std::function<void(const TranslationInfo&)> cb) {
+    _on_connect = cb ? std::move(cb) : [](const TranslationInfo&) {};
+}
+
+void PlayerProxy::setTranslationInfo()
+{
+    _transtalion_info.byte_speed = _media_src->getBytesSpeed();
+    _transtalion_info.start_time_stamp = _media_src->getCreateStamp();
+    _transtalion_info.stream_info.clear();
+    auto tracks = _muxer->getTracks();
+    for (auto &track : tracks) {
+        _transtalion_info.stream_info.emplace_back();
+        auto &back = _transtalion_info.stream_info.back();
+        back.bitrate = track->getBitRate();
+        back.codec_type = track->getTrackType();
+        back.codec_name = track->getCodecName();
+        switch (back.codec_type) {
+            case TrackAudio : {
+                auto audio_track = dynamic_pointer_cast<AudioTrack>(track);
+                back.audio_sample_rate = audio_track->getAudioSampleRate();
+                back.audio_channel = audio_track->getAudioChannel();
+                back.audio_sample_bit = audio_track->getAudioSampleBit();
+                break;
+            }
+            case TrackVideo : {
+                auto video_track = dynamic_pointer_cast<VideoTrack>(track);
+                back.video_width = video_track->getVideoWidth();
+                back.video_height = video_track->getVideoHeight();
+                back.video_fps = video_track->getVideoFps();
+                break;
+            }
+            default:
+                break;
+        }
+    }
+}
+
 void PlayerProxy::play(const string &strUrlTmp) {
     weak_ptr<PlayerProxy> weakSelf = shared_from_this();
     std::shared_ptr<int> piFailedCnt(new int(0)); // 连续播放失败次数
@@ -70,10 +118,13 @@ void PlayerProxy::play(const string &strUrlTmp) {
             // 播放成功
             *piFailedCnt = 0; // 连续播放失败次数清0
             strongSelf->onPlaySuccess();
+            strongSelf->setTranslationInfo();
+            strongSelf->_on_connect(strongSelf->_transtalion_info);  
 
             InfoL << "play " << strUrlTmp << " success";
         } else if (*piFailedCnt < strongSelf->_retry_count || strongSelf->_retry_count < 0) {
             // 播放失败，延时重试播放
+            strongSelf->_on_disconnect();
             strongSelf->rePlay(strUrlTmp, (*piFailedCnt)++);
         } else {
             // 达到了最大重试次数，回调关闭
@@ -157,7 +208,7 @@ PlayerProxy::~PlayerProxy() {
 }
 
 void PlayerProxy::rePlay(const string &strUrl, int iFailedCnt) {
-    auto iDelay = MAX(2 * 1000, MIN(iFailedCnt * 3000, 60 * 1000));
+    auto iDelay = MAX(_reconnect_delay_min * 1000, MIN(iFailedCnt * _reconnect_delay_step * 1000, _reconnect_delay_max * 1000));
     weak_ptr<PlayerProxy> weakSelf = shared_from_this();
     _timer = std::make_shared<Timer>(
         iDelay / 1000.0f,
@@ -216,6 +267,10 @@ float PlayerProxy::getLossRate(MediaSource &sender, TrackType type) {
     return getPacketLossRate(type);
 }
 
+TranslationInfo PlayerProxy::getTranslationInfo() {
+    return _transtalion_info;
+}
+
 void PlayerProxy::onPlaySuccess() {
     GET_CONFIG(bool, reset_when_replay, General::kResetWhenRePlay);
     if (dynamic_pointer_cast<RtspMediaSource>(_media_src)) {

src/Player/PlayerProxy.h

@@ -18,6 +18,45 @@
 
 namespace mediakit {
 
+struct StreamInfo
+{
+    TrackType codec_type;
+    std::string codec_name;
+    int bitrate;
+    int audio_sample_rate;
+    int audio_sample_bit;
+    int audio_channel;
+    int video_width;
+    int video_height;
+    float video_fps;
+
+    StreamInfo()
+    {
+        codec_type = TrackInvalid;
+        codec_name = "none";
+        bitrate = -1;
+        audio_sample_rate = -1;
+        audio_channel = -1;
+        audio_sample_bit = -1;
+        video_height = -1;
+        video_width = -1;
+        video_fps = -1.0;
+    }
+};
+
+struct TranslationInfo
+{
+    std::vector<StreamInfo> stream_info;
+    int byte_speed;
+    uint64_t start_time_stamp;
+
+    TranslationInfo()
+    {
+        byte_speed = -1;
+        start_time_stamp = 0;
+    }
+};
+
 class PlayerProxy
     : public MediaPlayer
     , public MediaSourceEvent
@@ -29,7 +68,7 @@ public:
     // 默认一直重试
     PlayerProxy(
         const std::string &vhost, const std::string &app, const std::string &stream_id, const ProtocolOption &option, int retry_count = -1,
-        const toolkit::EventPoller::Ptr &poller = nullptr);
+        const toolkit::EventPoller::Ptr &poller = nullptr, int reconnect_delay_min = 2, int reconnect_delay_max = 60, int reconnect_delay_step = 3);
 
     ~PlayerProxy() override;
 
@@ -46,6 +85,18 @@ public:
     void setOnClose(const std::function<void(const toolkit::SockException &ex)> &cb);
 
     /**
+    * Set a callback for failed server connection
+    * @param cb 回调对象
+    */
+    void setOnDisconnect(std::function<void()> cb);
+
+    /**
+    * Set a callback for a successful connection to the server
+    * @param cb 回调对象
+    */
+    void setOnConnect(std::function<void(const TranslationInfo&)> cb);
+
+    /**
      * 开始拉流播放
      * @param strUrl
      */
@@ -60,6 +111,9 @@ public:
     uint64_t getLiveSecs();
     uint64_t getRePullCount();
 
+    // Using this only makes sense after a successful connection to the server
+    TranslationInfo getTranslationInfo();
+
 private:
     // MediaSourceEvent override
     bool close(MediaSource &sender) override;
@@ -72,17 +126,24 @@ private:
     void rePlay(const std::string &strUrl, int iFailedCnt);
     void onPlaySuccess();
     void setDirectProxy();
+    void setTranslationInfo();
 
 private:
     ProtocolOption _option;
     int _retry_count;
+    int _reconnect_delay_min;
+    int _reconnect_delay_max;
+    int _reconnect_delay_step;
     std::string _vhost;
     std::string _app;
     std::string _stream_id;
     std::string _pull_url;
     toolkit::Timer::Ptr _timer;
+    std::function<void()> _on_disconnect;
+    std::function<void(const TranslationInfo &info)> _on_connect;
     std::function<void(const toolkit::SockException &ex)> _on_close;
     std::function<void(const toolkit::SockException &ex)> _on_play;
+    TranslationInfo _transtalion_info;
     MultiMediaSourceMuxer::Ptr _muxer;
 
     toolkit::Ticker _live_ticker;