vp8/decoder: add extern "C" to headers

Change-Id: I7865db2d15ffa8cfa4de88714e48734c5ff9bb86

vp8/decoder/dboolhuff.h

diff --git a/vp8/decoder/dboolhuff.h b/vp8/decoder/dboolhuff.h
index 82de6b8..36af7ee 100644
--- a/vp8/decoder/dboolhuff.h
+++ b/vp8/decoder/dboolhuff.h
@@ -19,6 +19,10 @@
 #include "vpx_ports/mem.h"
 #include "vpx/vpx_integer.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef size_t VP8_BD_VALUE;
 
 #define VP8_BD_VALUE_SIZE ((int)sizeof(VP8_BD_VALUE)*CHAR_BIT)
@@ -135,4 +139,8 @@
     return 0;
 }
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_DBOOLHUFF_H_

vp8/decoder/decodemv.h

diff --git a/vp8/decoder/decodemv.h b/vp8/decoder/decodemv.h
index b5d750c..f33b073 100644
--- a/vp8/decoder/decodemv.h
+++ b/vp8/decoder/decodemv.h
@@ -13,6 +13,14 @@
 
 #include "onyxd_int.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void vp8_decode_mode_mvs(VP8D_COMP *);
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_DECODEMV_H_

vp8/decoder/decoderthreading.h

diff --git a/vp8/decoder/decoderthreading.h b/vp8/decoder/decoderthreading.h
index 3a8277f..c563cf6 100644
--- a/vp8/decoder/decoderthreading.h
+++ b/vp8/decoder/decoderthreading.h
@@ -11,6 +11,10 @@
 #ifndef VP8_DECODER_DECODERTHREADING_H_
 #define VP8_DECODER_DECODERTHREADING_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if CONFIG_MULTITHREAD
 void vp8mt_decode_mb_rows(VP8D_COMP *pbi, MACROBLOCKD *xd);
 void vp8_decoder_remove_threads(VP8D_COMP *pbi);
@@ -19,4 +23,8 @@
 void vp8mt_de_alloc_temp_buffers(VP8D_COMP *pbi, int mb_rows);
 #endif
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_DECODERTHREADING_H_

vp8/decoder/detokenize.h

diff --git a/vp8/decoder/detokenize.h b/vp8/decoder/detokenize.h
index f134df8..f0b1254 100644
--- a/vp8/decoder/detokenize.h
+++ b/vp8/decoder/detokenize.h
@@ -13,7 +13,15 @@
 
 #include "onyxd_int.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void vp8_reset_mb_tokens_context(MACROBLOCKD *x);
 int vp8_decode_mb_tokens(VP8D_COMP *, MACROBLOCKD *);
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_DETOKENIZE_H_

vp8/decoder/ec_types.h

diff --git a/vp8/decoder/ec_types.h b/vp8/decoder/ec_types.h
index 0a3123a..3af5ca8 100644
--- a/vp8/decoder/ec_types.h
+++ b/vp8/decoder/ec_types.h
@@ -11,6 +11,10 @@
 #ifndef VP8_DECODER_EC_TYPES_H_
 #define VP8_DECODER_EC_TYPES_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define MAX_OVERLAPS 16
 
 
@@ -47,4 +51,8 @@
     MV_REFERENCE_FRAME ref_frame;
 } EC_BLOCK;
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_EC_TYPES_H_

vp8/decoder/error_concealment.h

diff --git a/vp8/decoder/error_concealment.h b/vp8/decoder/error_concealment.h
index 10bf870..9a1e024 100644
--- a/vp8/decoder/error_concealment.h
+++ b/vp8/decoder/error_concealment.h
@@ -15,6 +15,10 @@
 #include "onyxd_int.h"
 #include "ec_types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Allocate memory for the overlap lists */
 int vp8_alloc_overlap_lists(VP8D_COMP *pbi);
 
@@ -38,4 +42,8 @@
  */
 void vp8_conceal_corrupt_mb(MACROBLOCKD *xd);
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_ERROR_CONCEALMENT_H_

vp8/decoder/onyxd_int.h

diff --git a/vp8/decoder/onyxd_int.h b/vp8/decoder/onyxd_int.h
index 3728152..8ef4894 100644
--- a/vp8/decoder/onyxd_int.h
+++ b/vp8/decoder/onyxd_int.h
@@ -22,6 +22,10 @@
 #include "ec_types.h"
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct
 {
     int ithread;
@@ -148,4 +152,8 @@
     } while(0)
 #endif
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_ONYXD_INT_H_

vp8/decoder/treereader.h

diff --git a/vp8/decoder/treereader.h b/vp8/decoder/treereader.h
index 1d3f672..35ee696 100644
--- a/vp8/decoder/treereader.h
+++ b/vp8/decoder/treereader.h
@@ -15,6 +15,10 @@
 #include "vp8/common/treecoder.h"
 #include "dboolhuff.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef BOOL_DECODER vp8_reader;
 
 #define vp8_read vp8dx_decode_bool
@@ -37,4 +41,8 @@
     return -i;
 }
 
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
 #endif  // VP8_DECODER_TREEREADER_H_