From f358eeb89150fb091c66229b102189ddf1f8bbe8 Mon Sep 17 00:00:00 2001
From: Pascal Massimino <pascal.massimino@gmail.com>
Date: Thu, 16 Oct 2014 17:01:32 +0200
Subject: [PATCH] add code for testing random incremental decoding in dwebp

(protected with WEBP_EXPERIMENTAL_FEATURES flag)

Change-Id: I6cc2488810ce2ccd5d45882bd12f34a3d0c8eab8
---
 examples/example_util.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/examples/example_util.c b/examples/example_util.c
index f64cfd80..4462a5ac 100644
--- a/examples/example_util.c
+++ b/examples/example_util.c
@@ -243,7 +243,19 @@ VP8StatusCode ExUtilDecodeWebPIncremental(
       fprintf(stderr, "Failed during WebPINewDecoder().\n");
       return VP8_STATUS_OUT_OF_MEMORY;
     } else {
+#ifdef WEBP_EXPERIMENTAL_FEATURES
+      size_t size = 0;
+      const size_t incr = 2 + (data_size / 20);
+      while (size < data_size) {
+        size_t next_size = size + (rand() % incr);
+        if (next_size > data_size) next_size = data_size;
+        status = WebPIUpdate(idec, data, next_size);
+        if (status != VP8_STATUS_OK && status != VP8_STATUS_SUSPENDED) break;
+        size = next_size;
+      }
+#else
       status = WebPIUpdate(idec, data, data_size);
+#endif
       WebPIDelete(idec);
     }
   }