feat: 增加拉流代理rtsp时提供倍速功能支持 (#3669)

Co-authored-by: lidaofu <lidf@ahtelit.com>

api/include/mk_proxyplayer.h

@@ -79,7 +79,7 @@ API_EXPORT void API_CALL mk_proxy_player_release(mk_proxy_player ctx);
 /**
  * 设置代理播放器配置选项
  * @param ctx 代理播放器指针
- * @param key 配置项键,支持 net_adapter/rtp_type/rtsp_user/rtsp_pwd/protocol_timeout_ms/media_timeout_ms/beat_interval_ms
+ * @param key 配置项键,支持 net_adapter/rtp_type/rtsp_user/rtsp_pwd/protocol_timeout_ms/media_timeout_ms/beat_interval_ms/rtsp_speed
  * @param val 配置项值,如果是整形，需要转换成统一转换成string
  */
 API_EXPORT void API_CALL mk_proxy_player_set_option(mk_proxy_player ctx, const char *key, const char *val);

src/Common/config.cpp

@@ -375,6 +375,7 @@ const string kBenchmarkMode = "benchmark_mode";
 const string kWaitTrackReady = "wait_track_ready";
 const string kPlayTrack = "play_track";
 const string kProxyUrl = "proxy_url";
+const string kRtspSpeed = "rtsp_speed";
 } // namespace Client
 
 } // namespace mediakit

src/Common/config.h

@@ -447,6 +447,8 @@ extern const std::string kWaitTrackReady;
 extern const std::string kPlayTrack;
 //设置代理url，目前只支持http协议
 extern const std::string kProxyUrl;
+//设置开始rtsp倍速播放
+extern const std::string kRtspSpeed;
 } // namespace Client
 } // namespace mediakit
 

src/Rtsp/RtspPlayer.cpp

@@ -88,6 +88,7 @@ void RtspPlayer::play(const string &strUrl) {
     _rtp_type = (Rtsp::eRtpType)(int)(*this)[Client::kRtpType];
     _beat_type = (*this)[Client::kRtspBeatType].as<int>();
     _beat_interval_ms = (*this)[Client::kBeatIntervalMS].as<int>();
+    _speed = (*this)[Client::kRtspSpeed].as<float>();
     DebugL << url._url << " " << (url._user.size() ? url._user : "null") << " " << (url._passwd.size() ? url._passwd : "null") << " " << _rtp_type;
 
     weak_ptr<RtspPlayer> weakSelf = static_pointer_cast<RtspPlayer>(shared_from_this());
@@ -387,7 +388,12 @@ void RtspPlayer::handleResSETUP(const Parser &parser, unsigned int track_idx) {
     }
     // 所有setup命令发送完毕
     // 发送play命令
+    if (_speed==0.0f) {
         sendPause(type_play, 0);
+    } else {
+        sendPause(type_speed, 0);
+    }
+   
 }
 
 void RtspPlayer::sendDescribe() {
@@ -436,6 +442,9 @@ void RtspPlayer::sendPause(int type, uint32_t seekMS) {
         case type_seek:
             sendRtspRequest("PLAY", _control_url, { "Range", StrPrinter << "npt=" << setiosflags(ios::fixed) << setprecision(2) << seekMS / 1000.0 << "-" });
             break;
+        case type_speed:
+            speed(_speed);
+            break;
         default:
             WarnL << "unknown type : " << type;
             _on_response = nullptr;

src/Rtsp/RtspPlayer.h

@@ -120,6 +120,8 @@ private:
     uint32_t _beat_interval_ms = 0;
 
     std::string _play_url;
+    // rtsp开始倍速
+    float _speed= 0.0f;
     std::vector<SdpTrack::Ptr> _sdp_track;
     std::function<void(const Parser&)> _on_response;
     //RTP端口,trackid idx 为数组下标