#define AVUTIL_FIFO_H
#include <stdint.h>
+#include "avutil.h"
+#include "attributes.h"
typedef struct AVFifoBuffer {
uint8_t *buffer;
*/
void av_fifo_drain(AVFifoBuffer *f, int size);
-static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs)
+/**
+ * Return a pointer to the data stored in a FIFO buffer at a certain offset.
+ * The FIFO buffer is not modified.
+ *
+ * @param f AVFifoBuffer to peek at, f must be non-NULL
+ * @param offs an offset in bytes, its absolute value must be less
+ * than the used buffer size or the returned pointer will
+ * point outside to the buffer data.
+ * The used buffer size can be checked with av_fifo_size().
+ */
+static inline uint8_t *av_fifo_peek2(const AVFifoBuffer *f, int offs)
{
uint8_t *ptr = f->rptr + offs;
if (ptr >= f->end)
- ptr -= f->end - f->buffer;
- return *ptr;
+ ptr = f->buffer + (ptr - f->end);
+ else if (ptr < f->buffer)
+ ptr = f->end - (f->buffer - ptr);
+ return ptr;
}
+
#endif /* AVUTIL_FIFO_H */