Feature: release audio player

app/src/main/cpp/audio_player_jni.cpp

@@ -67,3 +67,7 @@ AUDIO_PLAYER_FUNC(void, again, jstring filter_jstr) {
     audioPlayer->setFilterDesc(desc);
 }
 
+AUDIO_PLAYER_FUNC(void, release) {
+    audioPlayer->setExit(true);
+}
+

app/src/main/cpp/ff_audio_player.cpp

@@ -146,6 +146,9 @@ int FFAudioPlayer::getSampleRate() const {
 
 int FFAudioPlayer::decodeAudio() {
     int ret;
+    if (exitPlaying.load()) {
+        return -1;
+    }
     // demux: read a frame(should be demux thread)
     ret = av_read_frame(formatContext, packet);
     if (ret < 0) {
@@ -209,7 +212,6 @@ int FFAudioPlayer::decodeAudio() {
     return buffer_size;
 }
 
-
 uint8_t *FFAudioPlayer::getDecodeFrame() const {
     return out_buffer;
 }
@@ -222,6 +224,10 @@ void FFAudioPlayer::setFilterDesc(const char *filterDescription) {
     filterDesc = filterDescription;
 }
 
+void FFAudioPlayer::setExit(bool exit) {
+    exitPlaying = exit;
+}
+
 void FFAudioPlayer::close() {
     if (formatContext) {
         avformat_close_input(&formatContext);

app/src/main/cpp/ff_audio_player.h

@@ -2,9 +2,10 @@
 // Created by xu fulong on 2022/9/4.
 //
 
-#ifndef LEARNINGMEDIA_FF_AUDIO_PLAYER_H
-#define LEARNINGMEDIA_FF_AUDIO_PLAYER_H
+#ifndef FF_AUDIO_PLAYER_H
+#define FF_AUDIO_PLAYER_H
 
+#include <stdatomic.h>
 #include "ffmpeg_jni_define.h"
 
 #ifdef __cplusplus
@@ -37,8 +38,9 @@ private:
     AVFrame *filterFrame;
     uint8_t *out_buffer;
 
-    bool filterAgain;
     const char *filterDesc;
+    std::atomic_bool filterAgain;
+    std::atomic_bool exitPlaying;
 
     AVFilterGraph *audioFilterGraph;
     AVFilterContext *audioSrcContext;
@@ -59,6 +61,8 @@ public:
 
     void setFilterDesc(const char *filterDescription);
 
+    void setExit(bool exit);
+
     void close();
 };
-#endif //LEARNINGMEDIA_FF_AUDIO_PLAYER_H
+#endif //FF_AUDIO_PLAYER_H