改成异步解码，并修复内存泄露问题

player/FFMpegDecoder.h

@@ -10,11 +10,9 @@
 
 #ifndef FFMpegDecoder_H_
 #define FFMpegDecoder_H_
-#include <string>
-#include <memory>
-#include <stdexcept>
-#include "Extension/Frame.h"
-#include "Extension/Track.h"
+
+#include "Util/TimeTicker.h"
+#include "Common/MediaSink.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -25,9 +23,6 @@ extern "C" {
 }
 #endif
 
-using namespace std;
-using namespace mediakit;
-
 class FFmpegFrame {
 public:
     using Ptr = std::shared_ptr<FFmpegFrame>;
@@ -36,14 +31,13 @@ public:
     ~FFmpegFrame();
 
     AVFrame *get() const;
-    void fillPicture(AVPixelFormat target_format, int target_width, int  target_height);
 
 private:
     char *_data = nullptr;
     std::shared_ptr<AVFrame> _frame;
 };
 
-class FFmpegSwr{
+class FFmpegSwr {
 public:
     using Ptr = std::shared_ptr<FFmpegSwr>;
 
@@ -58,33 +52,65 @@ private:
     int _target_samplerate;
     AVSampleFormat _target_format;
     SwrContext *_ctx = nullptr;
-    ResourcePool<FFmpegFrame> _frame_pool;
 };
 
-class FFmpegDecoder : public FrameWriterInterface {
+class TaskManager {
+public:
+    TaskManager() = default;
+    ~TaskManager();
+
+protected:
+    void startThread(const string &name);
+    void stopThread();
+
+    void addEncodeTask(function<void()> task);
+    void addDecodeTask(bool key_frame, function<void()> task);
+    bool isEnabled() const;
+
+private:
+    void onThreadRun(const string &name);
+    void pushExit();
+
+private:
+    class ThreadExitException : public std::runtime_error {
+    public:
+        ThreadExitException() : std::runtime_error("exit") {}
+        ~ThreadExitException() = default;
+    };
+
+private:
+    bool _decode_drop_start = false;
+    bool _exit = false;
+    mutex _task_mtx;
+    semaphore _sem;
+    List<function<void()> > _task;
+    std::shared_ptr<thread> _thread;
+};
+
+class FFmpegDecoder : public FrameWriterInterface, private TaskManager {
 public:
     using Ptr = std::shared_ptr<FFmpegDecoder>;
     using onDec = function<void(const FFmpegFrame::Ptr &)>;
 
     FFmpegDecoder(const Track::Ptr &track);
-    ~FFmpegDecoder() {}
+    ~FFmpegDecoder();
 
     void inputFrame(const Frame::Ptr &frame) override;
-    void inputFrame(const char *data, size_t size, uint32_t dts, uint32_t pts);
-
     void setOnDecode(onDec cb);
     void flush();
     const AVCodecContext *getContext() const;
 
 private:
     void onDecode(const FFmpegFrame::Ptr &frame);
+    void inputFrame_l(const Frame::Ptr &frame);
+    void decodeFrame(const char *data, size_t size, uint32_t dts, uint32_t pts);
 
 private:
+    bool _do_merger = false;
     Ticker _ticker;
     onDec _cb;
-    FFmpegSwr::Ptr _swr;
-    ResourcePool<FFmpegFrame> _frame_pool;
     std::shared_ptr<AVCodecContext> _context;
+    FrameMerger _merger{FrameMerger::h264_prefix};
 };
 
 #endif /* FFMpegDecoder_H_ */