Imported Debian version 2.5.0~trusty1.1

[deb_ffmpeg.git] / ffmpeg / libavcodec / put_bits.h

diff --git a/ffmpeg/libavcodec/put_bits.h b/ffmpeg/libavcodec/put_bits.h
index 8081fb9ea5a63f68706f5ccbdc88ac170cb9f558..8858caaacc8ddc3b019e3738dc877782371a68dc 100644 (file)
--- a/ffmpeg/libavcodec/put_bits.h
+++ b/ffmpeg/libavcodec/put_bits.h
@@ -62,6 +62,24 @@ static inline void init_put_bits(PutBitContext *s, uint8_t *buffer,
     s->bit_buf      = 0;
 }
 
+/**
+ * Rebase the bit writer onto a reallocated buffer.
+ *
+ * @param buffer the buffer where to put bits
+ * @param buffer_size the size in bytes of buffer,
+ *                    must be larger than the previous size
+ */
+static inline void rebase_put_bits(PutBitContext *s, uint8_t *buffer,
+                                   int buffer_size)
+{
+    av_assert0(8*buffer_size > s->size_in_bits);
+
+    s->buf_end = buffer + buffer_size;
+    s->buf_ptr = buffer + (s->buf_ptr - s->buf);
+    s->buf     = buffer;
+    s->size_in_bits = 8 * buffer_size;
+}
+
 /**
  * @return the total number of bits written to the bitstream.
  */