1 files changed, 25 insertions, 0 deletions
diff --git a/libavutil/fifo.h b/libavutil/fifo.h
new file mode 100644
index 0000000000..9dec0e62d9
--- /dev/null
+++ b/libavutil/fifo.h
@@ -0,0 +1,25 @@
+#ifndef FIFO_H
+#define FIFO_H
+
+typedef struct AVFifoBuffer {
+    uint8_t *buffer;
+    uint8_t *rptr, *wptr, *end;
+} AVFifoBuffer;
+
+int av_fifo_init(AVFifoBuffer *f, int size);
+void av_fifo_free(AVFifoBuffer *f);
+int av_fifo_size(AVFifoBuffer *f);
+int av_fifo_read(AVFifoBuffer *f, uint8_t *buf, int buf_size);
+int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void*, int), void* dest);
+void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size);
+void av_fifo_realloc(AVFifoBuffer *f, unsigned int size);
+void av_fifo_drain(AVFifoBuffer *f, int size);
+
+static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs)
+{
+    uint8_t *ptr = f->rptr + offs;
+    if (ptr >= f->end)
+        ptr -= f->end - f->buffer;
+    return *ptr;
+}
+#endif /* FIFO_H */