Implement av_fifo_realloc2().

Originally committed as revision 14846 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/avutil.h

@@ -35,7 +35,7 @@
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
 #define LIBAVUTIL_VERSION_MAJOR 49
-#define LIBAVUTIL_VERSION_MINOR  9
+#define LIBAVUTIL_VERSION_MINOR 10
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

libavutil/fifo.c

@@ -55,18 +55,24 @@ int av_fifo_read(AVFifoBuffer *f, uint8_t *buf, int buf_size)
  * Resizes a FIFO.
  */
 void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) {
+    av_fifo_realloc2(f, new_size);
+}
+
+int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size) {
     unsigned int old_size= f->end - f->buffer;
 
     if(old_size <= new_size){
         int len= av_fifo_size(f);
         AVFifoBuffer f2;
 
-        av_fifo_init(&f2, new_size);
+        if (av_fifo_init(&f2, new_size) < 0)
+            return -1;
         av_fifo_read(f, f2.buffer, len);
         f2.wptr += len;
         av_free(f->buffer);
         *f= f2;
     }
+    return 0;
 }
 
 void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)

libavutil/fifo.h

@@ -97,9 +97,18 @@ int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void
  * Resizes an AVFifoBuffer.
  * @param *f AVFifoBuffer to resize
  * @param size new AVFifoBuffer size in bytes
+ * @see av_fifo_realloc2()
  */
 void av_fifo_realloc(AVFifoBuffer *f, unsigned int size);
 
+/**
+ * Resizes an AVFifoBuffer.
+ * @param *f AVFifoBuffer to resize
+ * @param size new AVFifoBuffer size in bytes
+ * @return <0 for failure >=0 otherwise
+ */
+int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
+
 /**
  * Reads and discards the specified amount of data from an AVFifoBuffer.
  * @param *f AVFifoBuffer to read from