shithub: mp3dec

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Improve tags skip.
Also skip every tag type by default.

--- a/minimp3_ex.h

+++ b/minimp3_ex.h

@@ -90,21 +90,30 @@

 {

     char *buf = (char *)(*pbuf);

     size_t buf_size = *pbuf_size;

-    if (buf_size > 10 && !strncmp(buf, "ID3", 3))

+#ifndef MINIMP3_NOSKIP_ID3V2

+    if (buf_size > 10 && !memcmp(buf, "ID3", 3) && !((buf[5] & 15) || (buf[6] & 0x80) || (buf[7] & 0x80) || (buf[8] & 0x80) || (buf[9] & 0x80)))

     {

-        size_t id3v2size = (((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) |

-            ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f)) + 10;

+        size_t id3v2size = (((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) | ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f)) + 10;

+        if ((buf[5] & 16))

+            id3v2size += 10; /* footer */

         if (id3v2size >= buf_size)

             id3v2size = buf_size;

         buf      += id3v2size;

         buf_size -= id3v2size;

     }

-#ifdef MINIMP3_SKIP_ID3V1

-    if (buf_size > 128 && !strncmp(buf + buf_size - 128, "TAG", 3))

+#endif

+#ifndef MINIMP3_NOSKIP_ID3V1

+    if (buf_size > 128 && !memcmp(buf + buf_size - 128, "TAG", 3))

     {

         buf_size -= 128;

-        if (buf_size > 227 && !strncmp(buf + buf_size - 227, "TAG+", 4))

+        if (buf_size > 227 && !memcmp(buf + buf_size - 227, "TAG+", 4))

             buf_size -= 227;

+    }

+#endif

+#ifndef MINIMP3_NOSKIP_APEV2

+    if (buf_size > 32 && !memcmp(buf + buf_size - 32, "APETAGEX", 8))

+    {

+        buf_size -= 32;

     }

 #endif

     *pbuf = (const uint8_t *)buf;

--- a/minimp3_test.c

+++ b/minimp3_test.c

@@ -3,7 +3,6 @@

 /*#define MINIMP3_NONSTANDARD_BUT_LOGICAL*/

 #define MINIMP3_IMPLEMENTATION

 #define MINIMP3_ALLOW_MONO_STEREO_TRANSITION

-#define MINIMP3_SKIP_ID3V1

 #include "minimp3_ex.h"

 #include <stdio.h>

 #include <math.h>