avutil: Fix mismatching argument names

libavutil/hwcontext.h

@@ -249,7 +249,7 @@ const char *av_hwdevice_get_type_name(enum AVHWDeviceType type);
 /**
  * Iterate over supported device types.
  *
- * @param type AV_HWDEVICE_TYPE_NONE initially, then the previous type
+ * @param prev AV_HWDEVICE_TYPE_NONE initially, then the previous type
  *             returned by this function in subsequent iterations.
  * @return The next usable device type from enum AVHWDeviceType, or
  *         AV_HWDEVICE_TYPE_NONE if there are no more.

libavutil/mathematics.h

@@ -111,7 +111,8 @@ enum AVRounding {
 /**
  * Compute the greatest common divisor of two integer operands.
  *
- * @param a,b Operands
+ * @param a Operand
+ * @param b Operand
  * @return GCD of a and b up to sign; if a >= 0 and b >= 0, return value is >= 0;
  * if a == 0 and b == 0, returns 0.
  */
@@ -186,7 +187,8 @@ int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b);
  * av_compare_mod(0x11, 0x02, 0x20) > 0 // since 0x11 % 0x20 (0x11) > 0x02 % 0x20 (0x02)
  * @endcode
  *
- * @param a,b Operands
+ * @param a Operand
+ * @param b Operand
  * @param mod Divisor; must be a power of 2
  * @return
  *         - a negative value if `a % mod < b % mod`

libavutil/mem.h

@@ -667,7 +667,8 @@ void *av_dynarray2_add(void **tab_ptr, int *nb_ptr, size_t elem_size,
 /**
  * Multiply two `size_t` values checking for overflow.
  *
- * @param[in]  a,b Operands of multiplication
+ * @param[in]  a   Operand of multiplication
+ * @param[in]  b   Operand of multiplication
  * @param[out] r   Pointer to the result of the operation
  * @return 0 on success, AVERROR(EINVAL) on overflow
  */

libavutil/rational.h

@@ -179,7 +179,8 @@ AVRational av_d2q(double d, int max) av_const;
  * Find which of the two rationals is closer to another rational.
  *
  * @param q     Rational to be compared against
- * @param q1,q2 Rationals to be tested
+ * @param q1    Rational to be tested
+ * @param q2    Rational to be tested
  * @return One of the following values:
  *         - 1 if `q1` is nearer to `q` than `q2`
  *         - -1 if `q2` is nearer to `q` than `q1`