mantenance: stb_vorbis update to v1.16

ref/stb/stb_vorbis.c

@@ -1,4 +1,4 @@
-// Ogg Vorbis audio decoder - v1.14 - public domain
+// Ogg Vorbis audio decoder - v1.16 - public domain
 // http://nothings.org/stb_vorbis/
 //
 // Original version written by Sean Barrett in 2007.
@@ -33,6 +33,8 @@
 //    Timur Gagiev
 //
 // Partial history:
+//    1.16    - 2019-03-04 - fix warnings
+//    1.15    - 2019-02-07 - explicit failure if Ogg Skeleton data is found
 //    1.14    - 2018-02-11 - delete bogus dealloca usage
 //    1.13    - 2018-01-29 - fix truncation of last frame (hopefully)
 //    1.12    - 2017-11-21 - limit residue begin/end to blocksize/2 to avoid large temp allocs in bad/corrupt files
@@ -253,7 +255,7 @@ extern stb_vorbis * stb_vorbis_open_file(FILE *f, int close_handle_on_close,
 // create an ogg vorbis decoder from an open FILE *, looking for a stream at
 // the _current_ seek point (ftell). on failure, returns NULL and sets *error.
 // note that stb_vorbis must "own" this stream; if you seek it in between
-// calls to stb_vorbis, it will become confused. Morever, if you attempt to
+// calls to stb_vorbis, it will become confused. Moreover, if you attempt to
 // perform stb_vorbis_seek_*() operations on this file, it will assume it
 // owns the _entire_ rest of the file after the start point. Use the next
 // function, stb_vorbis_open_file_section(), to limit it.
@@ -374,7 +376,8 @@ enum STBVorbisError
    VORBIS_invalid_first_page,
    VORBIS_bad_packet_type,
    VORBIS_cant_find_last_page,
-   VORBIS_seek_failed
+   VORBIS_seek_failed,
+   VORBIS_ogg_skeleton_not_supported
 };
 
 
@@ -1073,7 +1076,7 @@ static int compute_codewords(Codebook *c, uint8 *len, int n, uint32 *values)
       assert(z >= 0 && z < 32);
       available[z] = 0;
       add_entry(c, bit_reverse(res), i, m++, len[i], values);
-      // propogate availability up the tree
+      // propagate availability up the tree
       if (z != len[i]) {
          assert(len[i] >= 0 && len[i] < 32);
          for (y=len[i]; y > z; --y) {
@@ -2637,7 +2640,7 @@ static void inverse_mdct(float *buffer, int n, vorb *f, int blocktype)
    // once I combined the passes.
 
    // so there's a missing 'times 2' here (for adding X to itself).
-   // this propogates through linearly to the end, where the numbers
+   // this propagates through linearly to the end, where the numbers
    // are 1/2 too small, and need to be compensated for.
 
    {
@@ -3578,7 +3581,22 @@ static int start_decoder(vorb *f)
    if (f->page_flag & PAGEFLAG_continued_packet)    return error(f, VORBIS_invalid_first_page);
    // check for expected packet length
    if (f->segment_count != 1)                       return error(f, VORBIS_invalid_first_page);
-   if (f->segments[0] != 30)                        return error(f, VORBIS_invalid_first_page);
+   if (f->segments[0] != 30) {
+      // check for the Ogg skeleton fishead identifying header to refine our error
+      if (f->segments[0] == 64 &&
+          getn(f, header, 6) &&
+          header[0] == 'f' &&
+          header[1] == 'i' &&
+          header[2] == 's' &&
+          header[3] == 'h' &&
+          header[4] == 'e' &&
+          header[5] == 'a' &&
+          get8(f)   == 'd' &&
+          get8(f)   == '\0')                        return error(f, VORBIS_ogg_skeleton_not_supported);
+      else
+                                                    return error(f, VORBIS_invalid_first_page);
+   }
+
    // read packet
    // check packet header
    if (get8(f) != VORBIS_packet_id)                 return error(f, VORBIS_invalid_first_page);
@@ -4566,7 +4584,7 @@ static int get_seek_page_info(stb_vorbis *f, ProbedPage *z)
    return 1;
 }
 
-// rarely used function to seek back to the preceeding page while finding the
+// rarely used function to seek back to the preceding page while finding the
 // start of a packet
 static int go_to_page_before(stb_vorbis *f, unsigned int limit_offset)
 {
@@ -4973,7 +4991,13 @@ stb_vorbis * stb_vorbis_open_file(FILE *file, int close_on_free, int *error, con
 
 stb_vorbis * stb_vorbis_open_filename(const char *filename, int *error, const stb_vorbis_alloc *alloc)
 {
-   FILE *f = fopen(filename, "rb");
+   FILE *f;
+#if defined(_WIN32) && defined(__STDC_WANT_SECURE_LIB__)
+   if (0 != fopen_s(&f, filename, "rb"))
+      f = NULL;
+#else
+   f = fopen(filename, "rb");
+#endif
    if (f) 
       return stb_vorbis_open_file(f, TRUE, error, alloc);
    if (error) *error = VORBIS_file_open_failure;
@@ -5459,4 +5483,4 @@ AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ------------------------------------------------------------------------------
-*/
+*/