avcodec/error_resilience: Avoid overhead of AVBuffer API

These buffers are not shared in any way.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/error_resilience.c

@@ -946,17 +946,17 @@ void ff_er_frame_end(ERContext *s)
         av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
 
         for (i = 0; i < 2; i++) {
-            s->ref_index_buf[i]  = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
-            s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
-            if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
+            s->ref_index[i]       = av_calloc(s->mb_stride * s->mb_height, 4 * sizeof(uint8_t));
+            s->motion_val_base[i] = av_calloc(size + 4, 2 * sizeof(uint16_t));
+            if (!s->ref_index[i] || !s->motion_val_base[i])
                 break;
-            s->cur_pic.ref_index[i]  = s->ref_index_buf[i]->data;
-            s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
+            s->cur_pic.ref_index[i]  = s->ref_index[i];
+            s->cur_pic.motion_val[i] = s->motion_val_base[i] + 4;
         }
         if (i < 2) {
             for (i = 0; i < 2; i++) {
-                av_buffer_unref(&s->ref_index_buf[i]);
-                av_buffer_unref(&s->motion_val_buf[i]);
+                av_freep(&s->ref_index[i]);
+                av_freep(&s->motion_val_base[i]);
                 s->cur_pic.ref_index[i]  = NULL;
                 s->cur_pic.motion_val[i] = NULL;
             }
@@ -1343,8 +1343,8 @@ void ff_er_frame_end(ERContext *s)
     }
 
     for (i = 0; i < 2; i++) {
-        av_buffer_unref(&s->ref_index_buf[i]);
-        av_buffer_unref(&s->motion_val_buf[i]);
+        av_freep(&s->ref_index[i]);
+        av_freep(&s->motion_val_base[i]);
         s->cur_pic.ref_index[i]  = NULL;
         s->cur_pic.motion_val[i] = NULL;
     }

libavcodec/error_resilience.h

@@ -75,8 +75,8 @@ typedef struct ERContext {
     ERPicture last_pic;
     ERPicture next_pic;
 
-    AVBufferRef *ref_index_buf[2];
-    AVBufferRef *motion_val_buf[2];
+    int8_t *ref_index[2];
+    int16_t (*motion_val_base[2])[2];
 
     uint16_t pp_time;
     uint16_t pb_time;