HLS: hls播放解决播放下一个切片导致数据丢失的bug： #1294

src/Http/HlsPlayer.cpp

@@ -9,6 +9,7 @@
  */
 
 #include "HlsPlayer.h"
+
 namespace mediakit {
 
 HlsPlayer::HlsPlayer(const EventPoller::Ptr &poller) {
@@ -28,7 +29,7 @@ void HlsPlayer::play_l(){
         teardown_l(SockException(Err_shutdown, "所有hls url都尝试播放失败!"));
         return;
     }
-    if (alive() && _waiting_response) {
+    if (waitResponse()) {
         return;
     }
     float playTimeOutSec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0f;
@@ -36,7 +37,6 @@ void HlsPlayer::play_l(){
     if (!(*this)[kNetAdapter].empty()) {
         setNetAdapter((*this)[kNetAdapter]);
     }
-    _waiting_response = true;
     sendRequest(_m3u8_list.back(), playTimeOutSec);
 }
 
@@ -51,69 +51,73 @@ void HlsPlayer::teardown() {
     teardown_l(SockException(Err_shutdown, "teardown"));
 }
 
-void HlsPlayer::playNextTs(bool force){
+void HlsPlayer::playNextTs() {
     if (_ts_list.empty()) {
         //播放列表为空，那么立即重新下载m3u8文件
         _timer.reset();
         play_l();
         return;
     }
-    if (!force && _http_ts_player && _http_ts_player->alive()) {
+    if (_http_ts_player && _http_ts_player->waitResponse()) {
         //播放器目前还存活，正在下载中
         return;
     }
-    auto ts_duration = _ts_list.front().duration * 1000;
+    weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
-    weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+    if (!_http_ts_player) {
-    std::shared_ptr<Ticker> ticker(new Ticker);
-
         _http_ts_player = std::make_shared<HttpTSPlayer>(getPoller(), false);
-
+        _http_ts_player->setOnCreateSocket([weak_self](const EventPoller::Ptr &poller) {
-    _http_ts_player->setOnCreateSocket([weakSelf](const EventPoller::Ptr &poller) {
+            auto strong_self = weak_self.lock();
-        auto strongSelf = weakSelf.lock();
+            if (strong_self) {
-        if (strongSelf) {
+                return strong_self->createSocket();
-            return strongSelf->createSocket();
             }
             return Socket::createSocket(poller, true);
         });
 
-    _http_ts_player->setOnDisconnect([weakSelf, ticker, ts_duration](const SockException &err) {
+        _http_ts_player->setOnPacket([weak_self](const char *data, size_t len) {
-        auto strongSelf = weakSelf.lock();
+            auto strong_self = weak_self.lock();
-        if (!strongSelf) {
+            if (!strong_self) {
-            return;
-        }
-        auto delay = ts_duration - 500 - ticker->elapsedTime();
-        if (delay <= 0) {
-            //播放这个ts切片花费了太长时间，我们立即下一个切片的播放
-            strongSelf->playNextTs(true);
-        } else {
-            //下一个切片慢点播放
-            strongSelf->_timer_ts.reset(new Timer(delay / 1000.0f, [weakSelf]() {
-                auto strongSelf = weakSelf.lock();
-                if (!strongSelf) {
-                    return false;
-                }
-                strongSelf->playNextTs(true);
-                return false;
-            }, strongSelf->getPoller()));
-        }
-    });
-
-    _http_ts_player->setOnPacket([weakSelf](const char *data, size_t len) {
-        auto strongSelf = weakSelf.lock();
-        if (!strongSelf) {
                 return;
             }
             //收到ts包
-        strongSelf->onPacket_l(data, len);
+            strong_self->onPacket_l(data, len);
         });
 
-    _http_ts_player->setMethod("GET");
         if (!(*this)[kNetAdapter].empty()) {
             _http_ts_player->setNetAdapter((*this)[Client::kNetAdapter]);
         }
+    }
 
-    _http_ts_player->sendRequest(_ts_list.front().url, 2 * _ts_list.front().duration);
+    Ticker ticker;
+    auto url = _ts_list.front().url;
+    auto duration = _ts_list.front().duration;
     _ts_list.pop_front();
+
+    _http_ts_player->setOnComplete([weak_self, ticker, duration, url](const SockException &err) {
+        auto strong_self = weak_self.lock();
+        if (!strong_self) {
+            return;
+        }
+        if (err) {
+            WarnL << "download ts segment " << url << " failed:" << err.what();
+        }
+        //提前半秒下载好
+        auto delay = duration - ticker.elapsedTime() / 1000.0f - 0.5;
+        if (delay <= 0) {
+            //延时最小10ms
+            delay = 10;
+        }
+        //延时下载下一个切片
+        strong_self->_timer_ts.reset(new Timer(delay / 1000.0f, [weak_self]() {
+            auto strong_self = weak_self.lock();
+            if (strong_self) {
+                strong_self->playNextTs();
+            }
+            return false;
+        }, strong_self->getPoller()));
+    });
+
+    _http_ts_player->setMethod("GET");
+    _http_ts_player->sendRequest(url, 2 * duration);
 }
 
 void HlsPlayer::onParsed(bool is_m3u8_inner, int64_t sequence, const map<int, ts_segment> &ts_map) {
@@ -146,12 +150,12 @@ void HlsPlayer::onParsed(bool is_m3u8_inner,int64_t sequence,const map<int,ts_se
         }
         _timer.reset();
 
-        weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+        weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
         auto url = ts_map.rbegin()->second.url;
-        getPoller()->async([weakSelf, url]() {
+        getPoller()->async([weak_self, url]() {
-            auto strongSelf = weakSelf.lock();
+            auto strong_self = weak_self.lock();
-            if (strongSelf) {
+            if (strong_self) {
-                strongSelf->play(url);
+                strong_self->play(url);
             }
         }, false);
     }
@@ -163,8 +167,8 @@ ssize_t HlsPlayer::onResponseHeader(const string &status, const HttpClient::Http
         teardown_l(SockException(Err_shutdown, StrPrinter << "bad http status code:" + status));
         return 0;
     }
-    auto contet_type = const_cast< HttpClient::HttpHeader &>(headers)["Content-Type"];
+    auto content_type = const_cast< HttpClient::HttpHeader &>(headers)["Content-Type"];
-    _is_m3u8 = (contet_type.find("application/vnd.apple.mpegurl") == 0);
+    _is_m3u8 = (content_type.find("application/vnd.apple.mpegurl") == 0);
     return -1;
 }
 
@@ -177,13 +181,12 @@ void HlsPlayer::onResponseBody(const char *buf, size_t size, size_t recvedSize,
 }
 
 void HlsPlayer::onResponseCompleted() {
-    _waiting_response = false;
     if (HlsParser::parse(getUrl(), _m3u8)) {
-        playDelay();
         if (_first) {
             _first = false;
             onPlayResult(SockException(Err_success, "play success"));
         }
+        playDelay();
     } else {
         teardown_l(SockException(Err_shutdown, "解析m3u8文件失败"));
     }
@@ -213,7 +216,6 @@ float HlsPlayer::delaySecond() {
 }
 
 void HlsPlayer::onDisconnect(const SockException &ex) {
-    _waiting_response = false;
     if (_first) {
         //第一次失败，则播放失败
         _first = false;
@@ -246,11 +248,11 @@ bool HlsPlayer::onRedirectUrl(const string &url,bool temporary) {
 }
 
 void HlsPlayer::playDelay() {
-    weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+    weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
-    _timer.reset(new Timer(delaySecond(), [weakSelf]() {
+    _timer.reset(new Timer(delaySecond(), [weak_self]() {
-        auto strongSelf = weakSelf.lock();
+        auto strong_self = weak_self.lock();
-        if (strongSelf) {
+        if (strong_self) {
-            strongSelf->play_l();
+            strong_self->play_l();
         }
         return false;
     }, getPoller()));

src/Http/HlsPlayer.h

@@ -96,7 +96,7 @@ private:
 private:
     void playDelay();
     float delaySecond();
-    void playNextTs(bool force = false);
+    void playNextTs();
     void teardown_l(const SockException &ex);
     void play_l();
     void onPacket_l(const char *data, size_t len);
@@ -112,7 +112,6 @@ private:
 private:
     bool _is_m3u8 = false;
     bool _first = true;
-    bool _waiting_response = false;
     int64_t _last_sequence = -1;
     string _m3u8;
     Timer::Ptr _timer;

src/Http/HttpTSPlayer.cpp

@@ -9,6 +9,7 @@
  */
 
 #include "HttpTSPlayer.h"
+
 namespace mediakit {
 
 HttpTSPlayer::HttpTSPlayer(const EventPoller::Ptr &poller, bool split_ts) {
@@ -17,16 +18,14 @@ HttpTSPlayer::HttpTSPlayer(const EventPoller::Ptr &poller, bool split_ts){
     setPoller(poller ? poller : EventPollerPool::Instance().getPoller());
 }
 
-HttpTSPlayer::~HttpTSPlayer() {}
+ssize_t HttpTSPlayer::onResponseHeader(const string &status, const HttpClient::HttpHeader &header) {
-
-ssize_t HttpTSPlayer::onResponseHeader(const string &status, const HttpClient::HttpHeader &headers) {
     _status = status;
     if (status != "200" && status != "206") {
         //http状态码不符合预期
         shutdown(SockException(Err_other, StrPrinter << "bad http status code:" + status));
         return 0;
     }
-    auto content_type = const_cast< HttpClient::HttpHeader &>(headers)["Content-Type"];
+    auto content_type = const_cast< HttpClient::HttpHeader &>(header)["Content-Type"];
     if (content_type.find("video/mp2t") == 0 || content_type.find("video/mpeg") == 0) {
         _is_ts_content = true;
     }
@@ -35,11 +34,11 @@ ssize_t HttpTSPlayer::onResponseHeader(const string &status, const HttpClient::H
     return -1;
 }
 
-void HttpTSPlayer::onResponseBody(const char *buf, size_t size, size_t recvedSize, size_t totalSize) {
+void HttpTSPlayer::onResponseBody(const char *buf, size_t size, size_t recved_size, size_t total_size) {
     if (_status != "200" && _status != "206") {
         return;
     }
-    if (recvedSize == size) {
+    if (recved_size == size) {
         //开始接收数据
         if (buf[0] == TS_SYNC_BYTE) {
             //这是ts头
@@ -57,14 +56,16 @@ void HttpTSPlayer::onResponseBody(const char *buf, size_t size, size_t recvedSiz
 }
 
 void HttpTSPlayer::onResponseCompleted() {
-    //接收完毕
+    emitOnComplete(SockException(Err_success, "play completed"));
-    shutdown(SockException(Err_success, "play completed"));
 }
 
 void HttpTSPlayer::onDisconnect(const SockException &ex) {
-    if (_on_disconnect) {
+    emitOnComplete(ex);
-        _on_disconnect(ex);
+}
-        _on_disconnect = nullptr;
+
+void HttpTSPlayer::emitOnComplete(const SockException &ex) {
+    if (_on_complete) {
+        _on_complete(ex);
     }
 }
 
@@ -74,12 +75,12 @@ void HttpTSPlayer::onPacket(const char *data, size_t len) {
     }
 }
 
-void HttpTSPlayer::setOnDisconnect(const HttpTSPlayer::onShutdown &cb) {
+void HttpTSPlayer::setOnComplete(onComplete cb) {
-    _on_disconnect = cb;
+    _on_complete = std::move(cb);
 }
 
-void HttpTSPlayer::setOnPacket(const TSSegment::onSegment &cb) {
+void HttpTSPlayer::setOnPacket(TSSegment::onSegment cb) {
-    _on_segment = cb;
+    _on_segment = std::move(cb);
 }
 
 }//namespace mediakit

src/Http/HttpTSPlayer.h

@@ -14,33 +14,46 @@
 #include "Http/HttpDownloader.h"
 #include "Player/MediaPlayer.h"
 #include "Rtp/TSDecoder.h"
+
 using namespace toolkit;
+
 namespace mediakit {
 
 //http-ts播发器，未实现ts解复用
 class HttpTSPlayer : public HttpClientImp {
 public:
-    typedef function<void(const SockException &)> onShutdown;
+    using Ptr = std::shared_ptr<HttpTSPlayer>;
-    typedef std::shared_ptr<HttpTSPlayer> Ptr;
+    using onComplete = std::function<void(const SockException &)>;
 
     HttpTSPlayer(const EventPoller::Ptr &poller = nullptr, bool split_ts = true);
-    ~HttpTSPlayer() override ;
+    ~HttpTSPlayer() override = default;
 
-    //设置异常断开回调
+    /**
-    void setOnDisconnect(const onShutdown &cb);
+     * 设置下载完毕或异常断开回调
-    //设置接收ts包回调
+     */
-    void setOnPacket(const TSSegment::onSegment &cb);
+    void setOnComplete(onComplete cb);
+
+    /**
+     * 设置接收ts包回调
+     */
+    void setOnPacket(TSSegment::onSegment cb);
 
 protected:
     ///HttpClient override///
-    ssize_t onResponseHeader(const string &status,const HttpHeader &headers) override;
+    ssize_t onResponseHeader(const string &status, const HttpHeader &header) override;
-    void onResponseBody(const char *buf,size_t size,size_t recvedSize,size_t totalSize) override;
+    void onResponseBody(const char *buf, size_t size, size_t recved_size, size_t total_size) override;
     void onResponseCompleted() override;
     void onDisconnect(const SockException &ex) override;
 
-    //收到ts包
+protected:
+    /**
+     * 收到ts数据
+     */
     virtual void onPacket(const char *data, size_t len);
 
+private:
+    void emitOnComplete(const SockException &ex);
+
 private:
     //是否为mpegts负载
     bool _is_ts_content = false;
@@ -50,7 +63,7 @@ private:
     bool _split_ts;
     string _status;
     TSSegment _segment;
-    onShutdown _on_disconnect;
+    onComplete _on_complete;
     TSSegment::onSegment _on_segment;
 };