ape: check avio_read() return value

[ffmpeg] / libavformat / avio_internal.h

diff --git a/libavformat/avio_internal.h b/libavformat/avio_internal.h
index 311e297e9a3b9c6892fcb31fc8937ceaaf3529f8..e67ba738122db9998e9cad6ef74ec4fb101c8c9e 100644 (file)
--- a/libavformat/avio_internal.h
+++ b/libavformat/avio_internal.h
@@ -37,6 +37,23 @@ int ffio_init_context(AVIOContext *s,
                   int64_t (*seek)(void *opaque, int64_t offset, int whence));
 
 
+/**
+ * Read size bytes from AVIOContext, returning a pointer.
+ * Note that the data pointed at by the returned pointer is only
+ * valid until the next call that references the same IO context.
+ * @param s IO context
+ * @param buf pointer to buffer into which to assemble the requested
+ *    data if it is not available in contiguous addresses in the
+ *    underlying buffer
+ * @param size number of bytes requested
+ * @param data address at which to store pointer: this will be a
+ *    a direct pointer into the underlying buffer if the requested
+ *    number of bytes are available at contiguous addresses, otherwise
+ *    will be a copy of buf
+ * @return number of bytes read or AVERROR
+ */
+int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data);
+
 /**
  * Read size bytes from AVIOContext into buf.
  * This reads at most 1 packet. If that is not enough fewer bytes will be