From ff67c8b500127406b0b89be773cd3e186cde0cf8 Mon Sep 17 00:00:00 2001
From: Tim Terriberry <tterribe@xiph.org>
Date: Thu, 14 Oct 2010 01:09:06 +0000
Subject: Port r16328 and r16330 from libvorbis.

ivorbisfile_example.c ignores an error code and plows ahead blindly if
 libvorbisidec reports the current bitstream section is bad (OV_EBADLINK).
Retrying after the error crashes libvorbisidec due to the unitialized state.


git-svn-id: https://svn.xiph.org/trunk/Tremor@17526 0101bb08-14d6-0310-b084-bc0e0c8e3800
---
 block.c               | 25 ++++++++++++++++++-------
 ivorbisfile_example.c | 11 ++++++++---
 2 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/block.c b/block.c
index b41482c..4fff4ad 100644
--- a/block.c
+++ b/block.c
@@ -161,14 +161,16 @@ static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){
   b->window[1]=_vorbis_window(0,ci->blocksizes[1]/2);
 
   /* finish the codebooks */
-  if(!ci->fullbooks){
+  if(!ci->fullbooks)
     ci->fullbooks=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->fullbooks));
-    for(i=0;i<ci->books;i++){
-      vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]);
-      /* decode codebooks are now standalone after init */
-      vorbis_staticbook_destroy(ci->book_param[i]);
-      ci->book_param[i]=NULL;
-    }
+  for(i=0;i<ci->books;i++){
+    if(ci->book_param[i]==NULL)
+      goto abort_books;
+    if(vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]))
+      goto abort_books;
+    /* decode codebooks are now standalone after init */
+    vorbis_staticbook_destroy(ci->book_param[i]);
+    ci->book_param[i]=NULL;
   }
 
   v->pcm_storage=ci->blocksizes[1];
@@ -191,6 +193,15 @@ static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){
 					 ci->map_param[mapnum]);
   }
   return 0;
+abort_books:
+  for(i=0;i<ci->books;i++){
+    if(ci->book_param[i]!=NULL){
+      vorbis_staticbook_destroy(ci->book_param[i]);
+      ci->book_param[i]=NULL;
+    }
+  }
+  vorbis_dsp_clear(v);
+  return -1;
 }
 
 int vorbis_synthesis_restart(vorbis_dsp_state *v){
diff --git a/ivorbisfile_example.c b/ivorbisfile_example.c
index 1854fc4..7b0cf10 100644
--- a/ivorbisfile_example.c
+++ b/ivorbisfile_example.c
@@ -21,8 +21,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <vorbis/ivorbiscodec.h>
-#include <vorbis/ivorbisfile.h>
+#include "ivorbiscodec.h"
+#include "ivorbisfile.h"
 
 #ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */
 #include <io.h>
@@ -69,7 +69,12 @@ int main(){
       /* EOF */
       eof=1;
     } else if (ret < 0) {
-      /* error in the stream.  Not a problem, just reporting it in
+      if(ret==OV_EBADLINK){
+        fprintf(stderr,"Corrupt bitstream section! Exiting.\n");
+        exit(1);
+      }
+
+      /* some other error in the stream.  Not a problem, just reporting it in
 	 case we (the app) cares.  In this case, we don't. */
     } else {
       /* we don't bother dealing with sample rate changes, etc, but
-- 
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