malloc max_fft_size memory

app/src/main/cpp/audio_player.cpp

@@ -309,9 +309,10 @@ AUDIO_PLAYER_FUNC(void, play, jstring input_jstr, jstring filter_jstr) {
         }
         if (got_frame > 0) {
 
-            ret = ensure_memory(fft_filter, frame->nb_samples);
-            if (ret == 0 && fft_filter->nb_samples == frame->nb_samples) {
-                memcpy(fft_filter->data, frame->data[0], static_cast<size_t>(frame->nb_samples));
+            int nb_samples = frame->nb_samples < MAX_FFT_SIZE ? frame->nb_samples : MAX_FFT_SIZE;
+            if (nb_samples >= MIN_FFT_SIZE) {
+                fft_filter->nb_samples = nb_samples;
+                memcpy(fft_filter->data, frame->data[0], nb_samples);
                 fft_once(fft_filter);
                 fft_callback(env, thiz, fft_method, fft_filter->output, fft_filter->out_samples);
             }

app/src/main/cpp/visualizer/execute_fft.cpp

@@ -207,6 +207,8 @@ int init_visualizer(filter_sys_t *p_filter)
     p_filter->out_samples = FFT_BUFFER_SIZE;
 #endif
     p_filter->output = (int8_t *) (malloc(p_filter->out_samples * sizeof(int8_t)));
+    p_filter->data_size = MAX_FFT_SIZE;
+    p_filter->data = (uint8_t *) (malloc(MAX_FFT_SIZE * sizeof(uint8_t)));
     return 0;
 }
 
@@ -226,24 +228,6 @@ void release_visualizer(filter_sys_t *p_filter)
     free(p_filter);
 }
 
-int ensure_memory(filter_sys_t *fft_filter, int nb_samples) {
-    if (nb_samples < MIN_FFT_SIZE) {
-        return -1;
-    }
-    if (nb_samples != fft_filter->nb_samples) {
-        if (!fft_filter->data) {
-            fft_filter->data_size = nb_samples;
-            fft_filter->data = (uint8_t *) (malloc(nb_samples * sizeof(uint8_t)));
-        } else if (nb_samples > fft_filter->data_size) {
-            fft_filter->data_size = nb_samples;
-            fft_filter->data = (uint8_t *) (realloc(fft_filter->data, nb_samples * sizeof(uint8_t)));
-        }
-        if (!fft_filter->data) return -1;
-        fft_filter->nb_samples = nb_samples;
-    }
-    return 0;
-}
-
 void fft_float(filter_sys_t *p_sys)
 {
     int nb_samples = p_sys->nb_samples;

app/src/main/cpp/visualizer/execute_fft.h

@@ -18,6 +18,7 @@ extern "C" {
 #include "block_queue.h"
 
 #define MIN_FFT_SIZE 128
+#define MAX_FFT_SIZE 1024
 
 #define FIXED_FFT 1
 
@@ -54,8 +55,6 @@ int init_visualizer(filter_sys_t *p_sys);
 
 void release_visualizer(filter_sys_t *p_sys);
 
-int ensure_memory(filter_sys_t *fft_filter, int nb_samples);
-
 void fft_float(filter_sys_t *p_sys);
 
 void fft_fixed(filter_sys_t *p_sys);