doxygen: Fix documentation for some VP8 functions.

libavcodec/vp8.c

@@ -641,8 +641,6 @@ void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_
  * @param block destination for block coefficients
  * @param probs probabilities to use when reading trees from the bitstream
  * @param i initial coeff index, 0 unless a separate DC block is coded
- * @param zero_nhood the initial prediction context for number of surrounding
- *                   all-zero blocks (only left/top, so 0-2)
  * @param qmul array holding the dc/ac dequant factor at position 0/1
  * @return 0 if no coeffs were decoded
  *         otherwise, the index of the last coeff decoded plus one
@@ -701,6 +699,17 @@ skip_eob:
 }
 #endif
 
+/**
+ * @param c arithmetic bitstream reader context
+ * @param block destination for block coefficients
+ * @param probs probabilities to use when reading trees from the bitstream
+ * @param i initial coeff index, 0 unless a separate DC block is coded
+ * @param zero_nhood the initial prediction context for number of surrounding
+ *                   all-zero blocks (only left/top, so 0-2)
+ * @param qmul array holding the dc/ac dequant factor at position 0/1
+ * @return 0 if no coeffs were decoded
+ *         otherwise, the index of the last coeff decoded plus one
+ */
 static av_always_inline
 int decode_block_coeffs(VP56RangeCoder *c, DCTELEM block[16],
                         uint8_t probs[16][3][NUM_DCT_TOKENS-1],
@@ -1034,10 +1043,9 @@ static const uint8_t subpel_idx[3][8] = {
 };
 
 /**
- * Generic MC function.
+ * luma MC function
  *
  * @param s VP8 decoding context
- * @param luma 1 for luma (Y) planes, 0 for chroma (Cb/Cr) planes
  * @param dst target buffer for block data at block position
  * @param ref reference picture buffer at origin (0, 0)
  * @param mv motion vector (relative to block position) to get pixel data from
@@ -1083,6 +1091,23 @@ void vp8_mc_luma(VP8Context *s, uint8_t *dst, AVFrame *ref, const VP56mv *mv,
     }
 }
 
+/**
+ * chroma MC function
+ *
+ * @param s VP8 decoding context
+ * @param dst1 target buffer for block data at block position (U plane)
+ * @param dst2 target buffer for block data at block position (V plane)
+ * @param ref reference picture buffer at origin (0, 0)
+ * @param mv motion vector (relative to block position) to get pixel data from
+ * @param x_off horizontal position of block from origin (0, 0)
+ * @param y_off vertical position of block from origin (0, 0)
+ * @param block_w width of block (16, 8 or 4)
+ * @param block_h height of block (always same as block_w)
+ * @param width width of src/dst plane data
+ * @param height height of src/dst plane data
+ * @param linesize size of a single line of plane data, including padding
+ * @param mc_func motion compensation function pointers (bilinear or sixtap MC)
+ */
 static av_always_inline
 void vp8_mc_chroma(VP8Context *s, uint8_t *dst1, uint8_t *dst2, AVFrame *ref,
                    const VP56mv *mv, int x_off, int y_off,