dwt: return errors from ff_slice_buffer_init()

libavcodec/dwt.c

@@ -22,9 +22,9 @@
 #include "dsputil.h"
 #include "dwt.h"
 
-void ff_slice_buffer_init(slice_buffer *buf, int line_count,
-                          int max_allocated_lines, int line_width,
-                          IDWTELEM *base_buffer)
+int ff_slice_buffer_init(slice_buffer *buf, int line_count,
+                         int max_allocated_lines, int line_width,
+                         IDWTELEM *base_buffer)
 {
     int i;
 
@@ -53,6 +53,7 @@ void ff_slice_buffer_init(slice_buffer *buf, int line_count,
     }
 
     buf->data_stack_top = max_allocated_lines - 1;
+    return 0;
 }
 
 IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line)

libavcodec/dwt.h

@@ -137,9 +137,9 @@ typedef struct DWTContext {
                                  : ff_slice_buffer_load_line((slice_buf),   \
                                                              (line_num)))
 
-void ff_slice_buffer_init(slice_buffer *buf, int line_count,
-                          int max_allocated_lines, int line_width,
-                          IDWTELEM *base_buffer);
+int ff_slice_buffer_init(slice_buffer *buf, int line_count,
+                         int max_allocated_lines, int line_width,
+                         IDWTELEM *base_buffer);
 void ff_slice_buffer_release(slice_buffer *buf, int line);
 void ff_slice_buffer_flush(slice_buffer *buf);
 void ff_slice_buffer_destroy(slice_buffer *buf);

libavcodec/snowdec.c

@@ -396,7 +396,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
 
     // realloc slice buffer for the case that spatial_decomposition_count changed
     ff_slice_buffer_destroy(&s->sb);
-    ff_slice_buffer_init(&s->sb, s->plane[0].height, (MB_SIZE >> s->block_max_depth) + s->spatial_decomposition_count * 8 + 1, s->plane[0].width, s->spatial_idwt_buffer);
+    if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,
+                                    (MB_SIZE >> s->block_max_depth) +
+                                    s->spatial_decomposition_count * 8 + 1,
+                                    s->plane[0].width,
+                                    s->spatial_idwt_buffer)) < 0)
+        return res;
 
     for(plane_index=0; plane_index<3; plane_index++){
         Plane *p= &s->plane[plane_index];