From 26cb47f99d481ad9b93eeff80d26e6b63bbd7e15 Mon Sep 17 00:00:00 2001
From: David Bryant <david@wavpack.com>
Date: Tue, 24 Apr 2018 22:18:07 -0700
Subject: [PATCH 2/2] issue #30 issue #31 issue #32: no multiple format chunks
 in WAV or W64

---
 cli/riff.c   | 7 ++++++-
 cli/wave64.c | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/cli/riff.c b/cli/riff.c
index 7bddf63..5d6452e 100644
--- a/cli/riff.c
+++ b/cli/riff.c
@@ -53,7 +53,7 @@ extern int debug_logging_mode;
 
 int ParseRiffHeaderConfig (FILE *infile, char *infilename, char *fourcc, WavpackContext *wpc, WavpackConfig *config)
 {
-    int is_rf64 = !strncmp (fourcc, "RF64", 4), got_ds64 = 0;
+    int is_rf64 = !strncmp (fourcc, "RF64", 4), got_ds64 = 0, format_chunk = 0;
     int64_t total_samples = 0, infilesize;
     RiffChunkHeader riff_chunk_header;
     ChunkHeader chunk_header;
@@ -140,6 +140,11 @@ int ParseRiffHeaderConfig (FILE *infile, char *infilename, char *fourcc, Wavpack
         else if (!strncmp (chunk_header.ckID, "fmt ", 4)) {     // if it's the format chunk, we want to get some info out of there and
             int supported = TRUE, format;                        // make sure it's a .wav file we can handle
 
+            if (format_chunk++) {
+                error_line ("%s is not a valid .WAV file!", infilename);
+                return WAVPACK_SOFT_ERROR;
+            }
+
             if (chunk_header.ckSize < 16 || chunk_header.ckSize > sizeof (WaveHeader) ||
                 !DoReadFile (infile, &WaveHeader, chunk_header.ckSize, &bcount) ||
                 bcount != chunk_header.ckSize) {
diff --git a/cli/wave64.c b/cli/wave64.c
index fa928a0..0388dc7 100644
--- a/cli/wave64.c
+++ b/cli/wave64.c
@@ -53,6 +53,7 @@ int ParseWave64HeaderConfig (FILE *infile, char *infilename, char *fourcc, Wavpa
     Wave64ChunkHeader chunk_header;
     Wave64FileHeader filehdr;
     WaveHeader WaveHeader;
+    int format_chunk = 0;
     uint32_t bcount;
 
     infilesize = DoGetFileSize (infile);
@@ -104,6 +105,11 @@ int ParseWave64HeaderConfig (FILE *infile, char *infilename, char *fourcc, Wavpa
         if (!memcmp (chunk_header.ckID, fmt_guid, sizeof (fmt_guid))) {
             int supported = TRUE, format;
 
+            if (format_chunk++) {
+                error_line ("%s is not a valid .W64 file!", infilename);
+                return WAVPACK_SOFT_ERROR;
+            }
+
             chunk_header.ckSize = (chunk_header.ckSize + 7) & ~7L;
 
             if (chunk_header.ckSize < 16 || chunk_header.ckSize > sizeof (WaveHeader) ||
-- 
2.14.3