libvpx: Pull from upstream

source/libvpx/vpx/vpx_encoder.h

Index: source/libvpx/vpx/vpx_encoder.h
diff --git a/source/libvpx/vpx/vpx_encoder.h b/source/libvpx/vpx/vpx_encoder.h
index da5bd06597ad0207aa2b13ac67d760a5bd76d91e..8f7bff51852b54cb3defad8059f1524cc3c5f509 100644
--- a/source/libvpx/vpx/vpx_encoder.h
+++ b/source/libvpx/vpx/vpx_encoder.h
@@ -232,8 +232,8 @@ extern "C" {
 
   /*!\brief Callback function pointer / user data pair storage */
   typedef struct vpx_codec_enc_output_cx_cb_pair {
-    vpx_codec_enc_output_cx_pkt_cb_fn_t output_cx_pkt;
-    void                            *user_priv;
+    vpx_codec_enc_output_cx_pkt_cb_fn_t output_cx_pkt; /**< Callback function */
+    void                            *user_priv; /**< Pointer to private data */
   } vpx_codec_priv_output_cx_pkt_cb_pair_t;
 
   /*!\brief Rational Number
@@ -737,10 +737,10 @@ extern "C" {
    *
    */
   typedef struct vpx_svc_parameters {
-    int max_quantizers[VPX_SS_MAX_LAYERS];
-    int min_quantizers[VPX_SS_MAX_LAYERS];
-    int scaling_factor_num[VPX_SS_MAX_LAYERS];
-    int scaling_factor_den[VPX_SS_MAX_LAYERS];
+    int max_quantizers[VPX_SS_MAX_LAYERS]; /**< Max Q for each layer */
+    int min_quantizers[VPX_SS_MAX_LAYERS]; /**< Min Q for each layer */
+    int scaling_factor_num[VPX_SS_MAX_LAYERS]; /**< Scaling factor-numerator*/
+    int scaling_factor_den[VPX_SS_MAX_LAYERS]; /**< Scaling factor-denominator*/
   } vpx_svc_extra_cfg_t;