shithub: libvpx

Download patch

ref: 26210c672a075319aaf1dda40d95f1f0590c5bda
parent: 79303c993ae09390b6e636943f2f44c545f41928
author: Deb Mukherjee <debargha@google.com>
date: Fri Apr 4 10:38:29 EDT 2014 

Adds test code for supplemental superframe data

Adds test code to verify that supplemental superframe information
that precedes the normal superframe information will not break
decoding.

Change-Id: Ia252b887d7ee138f51dc9a778376ff739402c455


--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -628,7 +628,8 @@
   }
 }
 
-
+// Turn on to test if supplemental superframe data breaks decoding
+// #define TEST_SUPPLEMENTAL_SUPERFRAME_DATA
 static int write_superframe_index(vpx_codec_alg_priv_t *ctx) {
   uint8_t marker = 0xc0;
   unsigned int mask;
@@ -654,6 +655,20 @@
   if (ctx->pending_cx_data_sz + index_sz < ctx->cx_data_sz) {
     uint8_t *x = ctx->pending_cx_data + ctx->pending_cx_data_sz;
     int i, j;
+#ifdef TEST_SUPPLEMENTAL_SUPERFRAME_DATA
+    uint8_t marker_test = 0xc0;
+    int mag_test = 2;     // 1 - 4
+    int frames_test = 4;  // 1 - 8
+    int index_sz_test = 2 + mag_test * frames_test;
+    marker_test |= frames_test - 1;
+    marker_test |= (mag_test - 1) << 3;
+    *x++ = marker_test;
+    for (i = 0; i < mag_test * frames_test; ++i)
+      *x++ = 0;  // fill up with arbitrary data
+    *x++ = marker_test;
+    ctx->pending_cx_data_sz += index_sz_test;
+    printf("Added supplemental superframe data\n");
+#endif
 
     *x++ = marker;
     for (i = 0; i < ctx->pending_frame_count; i++) {
@@ -666,6 +681,9 @@
     }
     *x++ = marker;
     ctx->pending_cx_data_sz += index_sz;
+#ifdef TEST_SUPPLEMENTAL_SUPERFRAME_DATA
+    index_sz += index_sz_test;
+#endif
   }
   return index_sz;
 }
-- 
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