X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Favio_internal.h;h=a8bcadd38b60ba22bd53eebe301291dc84f3a4ce;hb=8895bf7b78650c0c21c88cec0484e138ec511a4b;hp=4fa3adb2706c7409e214f32ddba3800015c8f9dc;hpb=daf1e0d3de03bd424016e2a7520e4e94ece5c0ac;p=ffmpeg

diff --git a/libavformat/avio_internal.h b/libavformat/avio_internal.h
index 4fa3adb2706..a8bcadd38b6 100644
--- a/libavformat/avio_internal.h
+++ b/libavformat/avio_internal.h
@@ -52,7 +52,7 @@ int ffio_init_context(AVIOContext *s,
  *    will be a copy of buf
  * @return number of bytes read or AVERROR
  */
-int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, unsigned char **data);
+int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data);
 
 /**
  * Read size bytes from AVIOContext into buf.
@@ -94,6 +94,8 @@ void ffio_init_checksum(AVIOContext *s,
 unsigned long ffio_get_checksum(AVIOContext *s);
 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
                                     unsigned int len);
+unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
+                                unsigned int len);
 
 /**
  * Open a write only packetized memory stream with a maximum packet
@@ -119,4 +121,22 @@ int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
  */
 int ffio_fdopen(AVIOContext **s, URLContext *h);
 
+/**
+ * Open a write-only fake memory stream. The written data is not stored
+ * anywhere - this is only used for measuring the amount of data
+ * written.
+ *
+ * @param s new IO context
+ * @return zero if no error.
+ */
+int ffio_open_null_buf(AVIOContext **s);
+
+/**
+ * Close a null buffer.
+ *
+ * @param s an IO context opened by ffio_open_null_buf
+ * @return the number of bytes written to the null buffer
+ */
+int ffio_close_null_buf(AVIOContext *s);
+
 #endif /* AVFORMAT_AVIO_INTERNAL_H */