pull filtered audio from the filter graph

app/src/main/cpp/audio_player.cpp

@@ -28,7 +28,7 @@ extern "C" {
 #define SLEEP_TIME 1000 * 16
 #define MAX_AUDIO_FRAME_SIZE 48000 * 4
 
-const char *filter_descr = "superequalizer=6b=6:8b=6";
+const char *filter_descr = "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) {
@@ -276,7 +276,7 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr) {
 //            in_ch_layout, in_sample_fmt, in_sample_rate);
     ret = init_equalizer_filter(codecCtx, &audioFilterGraph, &audioSrcContext, &audioSinkContext);
     if (ret < 0) {
-        LOGE(TAG, "Unable to init filter graph:%d", stderr);
+        LOGE(TAG, "Unable to init filter graph:%d", ret);
         goto end;
     }
 
@@ -290,19 +290,17 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr) {
             if (got_frame > 0) {
                 ret = av_buffersrc_add_frame(audioSrcContext, frame);
                 if (ret < 0) {
-                    LOGE(TAG, "Error add the frame to the filter graph:%d", stderr);
+                    LOGE(TAG, "Error add the frame to the filter graph:%d", ret);
                 }
                 /* Get all the filtered output that is available. */
+                while (1) {
                     ret = av_buffersink_get_frame(audioSinkContext, filter_frame);
-                if (ret == AVERROR(EAGAIN)) {
-                    LOGE(TAG, "get filter frame again...");
-                    continue;
-                }
+                    if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
+                        break;
                     if (ret < 0) {
-                    LOGE(TAG, "Error get the frame from the filter graph:%d", stderr);
+                        LOGE(TAG, "Error get the frame from the filter graph:%d", ret);
                         goto end;
                     }
-
                     //convert audio format
                     swr_convert(swrCtx, &out_buffer, MAX_AUDIO_FRAME_SIZE,
                                 (const uint8_t **) /*frame*/filter_frame->data, /*frame*/filter_frame->nb_samples);
@@ -321,6 +319,7 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr) {
                     usleep(SLEEP_TIME);
                 }
             }
+        }
         av_packet_unref(packet);
     }
 end: