update equalizer when seeking progress

app/src/main/cpp/audio_player.cpp

@@ -28,7 +28,8 @@ extern "C" {
 #define SLEEP_TIME 1000 * 16
 #define MAX_AUDIO_FRAME_SIZE 48000 * 4
 
-//const char *filter_descr = "superequalizer=6b=4:8b=5:10b=5";
+int filter_again = 0;
+const char *filter_desc = "superequalizer=6b=4:8b=5:10b=5";
 
 int init_volume_filter(AVFilterGraph **graph, AVFilterContext **src, AVFilterContext **sink,
         uint64_t channel_layout, AVSampleFormat inputFormat, int sample_rate) {
@@ -204,7 +205,7 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr, jstring filter_jstr) {
 
     const char *input_cstr = env->GetStringUTFChars(input_jstr, NULL);
     LOGI(TAG, "input url=%s", input_cstr);
-    const char *filter_desc = env->GetStringUTFChars(filter_jstr, NULL);
+    filter_desc = env->GetStringUTFChars(filter_jstr, NULL);
     LOGE(TAG, "filter_desc=%s", filter_desc);
     av_register_all();
     AVFormatContext *pFormatCtx = avformat_alloc_context();
@@ -280,7 +281,19 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr, jstring filter_jstr) {
 
     //read audio frame
     while (av_read_frame(pFormatCtx, packet) >= 0) {
-        if (packet->stream_index == audio_stream_idx) {
+        if (packet->stream_index != audio_stream_idx) {
+            av_packet_unref(packet);
+            continue;
+        }
+        if (filter_again) {
+            filter_again = 0;
+            avfilter_graph_free(&audioFilterGraph);
+            if (init_equalizer_filter(filter_desc, codecCtx, &audioFilterGraph, &audioSrcContext, &audioSinkContext) < 0) {
+                LOGE(TAG, "init_filter error, ret=%d\n", ret);
+                goto end;
+            }
+            LOGE(TAG, "play again,filter_descr=_=%s", filter_desc);
+        }
         ret = avcodec_decode_audio4(codecCtx, frame, &got_frame, packet);
         if (ret < 0) {
             break;
@@ -317,7 +330,6 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr, jstring filter_jstr) {
                 usleep(SLEEP_TIME);
             }
         }
-        }
         av_packet_unref(packet);
     }
 end:
@@ -332,3 +344,9 @@ end:
     env->ReleaseStringUTFChars(input_jstr, input_cstr);
     env->ReleaseStringUTFChars(filter_jstr, filter_desc);
 }
+
+AUDIO_PLAYER_FUNC(void, again, jstring filter_jstr) {
+    if (!filter_jstr) return;
+    filter_again = 1;
+    filter_desc = env->GetStringUTFChars(filter_jstr, NULL);
+}

app/src/main/java/com/frank/ffmpeg/AudioPlayer.java

@@ -17,6 +17,8 @@ public class AudioPlayer {
     //using AudioTrack to play
     public native void play(String audioPath, String filterDesc);
 
+    public native void again(String filterDesc);
+
     //using OpenSL ES to play
     public native void playAudio(String audioPath);
 

app/src/main/java/com/frank/ffmpeg/activity/EqualizerActivity.kt

@@ -30,7 +30,7 @@ class EqualizerActivity : BaseActivity(), OnSeeBarListener {
     private var filterThread: Thread? = null
     private var mAudioPlayer: AudioPlayer? = null
     private var equalizerAdapter: EqualizerAdapter? = null
-    private var audioPath = Environment.getExternalStorageDirectory().path + "/tiger.mp3"
+    private var audioPath = Environment.getExternalStorageDirectory().path + "/know_play.mp3"
 
     override val layoutId: Int
         get() = R.layout.activity_equalizer
@@ -68,6 +68,10 @@ class EqualizerActivity : BaseActivity(), OnSeeBarListener {
     }
 
     private fun doEqualize() {
+        doEqualize(0, 0)
+    }
+
+    private fun doEqualize(index: Int, progress: Int) {
 //        val bandList = arrayListOf<String>()
 //        bandList.add("6b=5")
 //        bandList.add("8b=4")
@@ -75,19 +79,19 @@ class EqualizerActivity : BaseActivity(), OnSeeBarListener {
 //        bandList.add("12b=2")
 //        bandList.add("14b=1")
 //        bandList.add("16b=0")
-        val filter = "superequalizer=6b=4:8b=5:10b=5"
         if (filterThread == null) {
+            val filter = "superequalizer=6b=4:8b=5:10b=5"
             filterThread = Thread(Runnable {
                 mAudioPlayer!!.play(audioPath, filter)
             })
             filterThread!!.start()
         } else {
-//            mAudioPlayer!!.again(position)
+            mAudioPlayer!!.again("superequalizer=8b=4:10b=5:12b=5")
         }
     }
 
     override fun onProgress(index: Int, progress: Int) {
-        doEqualize()
+        doEqualize(index, progress)
     }
 
     override fun onViewClick(view: View) {