char *q, dst[512];
int len, dstlen = sizeof(dst) - 1;
unsigned genre;
+ unsigned int (*get)(ByteIOContext*) = get_be16;
dst[0] = 0;
if (taglen < 1)
*q = 0;
break;
+ case 1: /* UTF-16 with BOM */
+ taglen -= 2;
+ switch (get_be16(s->pb)) {
+ case 0xfffe:
+ get = get_le16;
+ case 0xfeff:
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Incorrect BOM value in tag %s.\n", key);
+ return;
+ }
+ // fall-through
+
+ case 2: /* UTF-16BE without BOM */
+ q = dst;
+ while (taglen > 1 && q - dst < dstlen - 7) {
+ uint32_t ch;
+ uint8_t tmp;
+
+ GET_UTF16(ch, ((taglen -= 2) >= 0 ? get(s->pb) : 0), break;)
+ PUT_UTF8(ch, tmp, *q++ = tmp;)
+ }
+ *q = 0;
+ break;
+
case 3: /* UTF-8 */
len = FFMIN(taglen, dstlen - 1);
get_buffer(s->pb, dst, len);
dst[len] = 0;
break;
+ default:
+ av_log(s, AV_LOG_WARNING, "Unknown encoding in tag %s\n.", key);
}
if (!strcmp(key, "genre")
}
/*!
+ * \def GET_UTF16(val, GET_16BIT, ERROR)
+ * Converts a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form
+ * \param val is the output and should be of type uint32_t. It holds the converted
+ * UCS-4 character and should be a left value.
+ * \param GET_16BIT gets two bytes of UTF-16 encoded data converted to native endianness.
+ * It can be a function or a statement whose return value or evaluated value is of type
+ * uint16_t. It will be executed up to 2 times.
+ * \param ERROR action that should be taken when an invalid UTF-16 surrogate is
+ * returned from GET_BYTE. It should be a statement that jumps out of the macro,
+ * like exit(), goto, return, break, or continue.
+ */
+#define GET_UTF16(val, GET_16BIT, ERROR)\
+ val = GET_16BIT;\
+ {\
+ unsigned int hi = val - 0xD800;\
+ if (hi < 0x800) {\
+ val = GET_16BIT - 0xDC00;\
+ if (val > 0x3FFU || hi > 0x3FFU)\
+ ERROR\
+ val += (hi<<10) + 0x10000;\
+ }\
+ }\
+
+/*!
* \def PUT_UTF8(val, tmp, PUT_BYTE)
* Converts a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
* \param val is an input-only argument and should be of type uint32_t. It holds