cosmetics: Remove unnecessary extern keywords from function declarations

10 files changed, 359 insertions, 362 deletions

diff --git a/libavcodec/mpeg12.h b/libavcodec/mpeg12.h
index 2c8f935b2b..cf807ec8ff 100644
--- a/libavcodec/mpeg12.h
+++ b/libavcodec/mpeg12.h
@@ -71,6 +71,6 @@ static inline int decode_dc(GetBitContext *gb, int component)
     return diff;
 }
 
-extern int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);
+int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);
 
 #endif /* AVCODEC_MPEG12_H */
diff --git a/libavcodec/x86/ac3dsp_init.c b/libavcodec/x86/ac3dsp_init.c
index e8f7304ca3..99815f7bd1 100644
--- a/libavcodec/x86/ac3dsp_init.c
+++ b/libavcodec/x86/ac3dsp_init.c
@@ -26,30 +26,30 @@
 #include "libavcodec/ac3.h"
 #include "libavcodec/ac3dsp.h"
 
-extern void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
-extern void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
-extern void ff_ac3_exponent_min_sse2  (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
+void ff_ac3_exponent_min_mmx   (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
+void ff_ac3_exponent_min_mmxext(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
+void ff_ac3_exponent_min_sse2  (uint8_t *exp, int num_reuse_blocks, int nb_coefs);
 
-extern int ff_ac3_max_msb_abs_int16_mmx  (const int16_t *src, int len);
-extern int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
-extern int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
-extern int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len);
+int ff_ac3_max_msb_abs_int16_mmx  (const int16_t *src, int len);
+int ff_ac3_max_msb_abs_int16_mmxext(const int16_t *src, int len);
+int ff_ac3_max_msb_abs_int16_sse2 (const int16_t *src, int len);
+int ff_ac3_max_msb_abs_int16_ssse3(const int16_t *src, int len);
 
-extern void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
-extern void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
+void ff_ac3_lshift_int16_mmx (int16_t *src, unsigned int len, unsigned int shift);
+void ff_ac3_lshift_int16_sse2(int16_t *src, unsigned int len, unsigned int shift);
 
-extern void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
-extern void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
+void ff_ac3_rshift_int32_mmx (int32_t *src, unsigned int len, unsigned int shift);
+void ff_ac3_rshift_int32_sse2(int32_t *src, unsigned int len, unsigned int shift);
 
-extern void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
-extern void ff_float_to_fixed24_sse  (int32_t *dst, const float *src, unsigned int len);
-extern void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
+void ff_float_to_fixed24_3dnow(int32_t *dst, const float *src, unsigned int len);
+void ff_float_to_fixed24_sse  (int32_t *dst, const float *src, unsigned int len);
+void ff_float_to_fixed24_sse2 (int32_t *dst, const float *src, unsigned int len);
 
-extern int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
+int ff_ac3_compute_mantissa_size_sse2(uint16_t mant_cnt[6][16]);
 
-extern void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs);
-extern void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
-extern void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
+void ff_ac3_extract_exponents_3dnow(uint8_t *exp, int32_t *coef, int nb_coefs);
+void ff_ac3_extract_exponents_sse2 (uint8_t *exp, int32_t *coef, int nb_coefs);
+void ff_ac3_extract_exponents_ssse3(uint8_t *exp, int32_t *coef, int nb_coefs);
 
 #if HAVE_SSE_INLINE && HAVE_7REGS
 
diff --git a/libavcodec/x86/videodsp.asm b/libavcodec/x86/videodsp.asm
index 19b910b923..34f007f8d2 100644
--- a/libavcodec/x86/videodsp.asm
+++ b/libavcodec/x86/videodsp.asm
@@ -23,9 +23,9 @@
 
 SECTION .text
 
-; extern void ff_emu_edge_core(uint8_t *buf, const uint8_t *src, x86_reg linesize,
-;                              x86_reg start_y, x86_reg end_y, x86_reg block_h,
-;                              x86_reg start_x, x86_reg end_x, x86_reg block_w);
+; void ff_emu_edge_core(uint8_t *buf, const uint8_t *src, x86_reg linesize,
+;                       x86_reg start_y, x86_reg end_y, x86_reg block_h,
+;                       x86_reg start_x, x86_reg end_x, x86_reg block_w);
 ;
 ; The actual function itself is below. It basically wraps a very simple
 ; w = end_x - start_x
diff --git a/libavcodec/x86/vp8dsp_init.c b/libavcodec/x86/vp8dsp_init.c
index 38770c34b0..629a7bc77b 100644
--- a/libavcodec/x86/vp8dsp_init.c
+++ b/libavcodec/x86/vp8dsp_init.c
@@ -30,93 +30,93 @@
 /*
  * MC functions
  */
-extern void ff_put_vp8_epel4_h4_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_h6_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_v4_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_v6_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-
-extern void ff_put_vp8_epel8_h4_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_h6_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_v4_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_v6_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-
-extern void ff_put_vp8_epel4_h4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_h6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_v4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel4_v6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_h4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_h6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_v4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-extern void ff_put_vp8_epel8_v6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                       uint8_t *src, ptrdiff_t srcstride,
-                                       int height, int mx, int my);
-
-extern void ff_put_vp8_bilinear4_h_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear8_h_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear4_h_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear8_h_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-
-extern void ff_put_vp8_bilinear4_v_mmxext(uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear8_v_sse2  (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear4_v_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-extern void ff_put_vp8_bilinear8_v_ssse3 (uint8_t *dst, ptrdiff_t dststride,
-                                          uint8_t *src, ptrdiff_t srcstride,
-                                          int height, int mx, int my);
-
-
-extern void ff_put_vp8_pixels8_mmx (uint8_t *dst, ptrdiff_t dststride,
-                                    uint8_t *src, ptrdiff_t srcstride,
-                                    int height, int mx, int my);
-extern void ff_put_vp8_pixels16_mmx(uint8_t *dst, ptrdiff_t dststride,
-                                    uint8_t *src, ptrdiff_t srcstride,
-                                    int height, int mx, int my);
-extern void ff_put_vp8_pixels16_sse(uint8_t *dst, ptrdiff_t dststride,
-                                    uint8_t *src, ptrdiff_t srcstride,
-                                    int height, int mx, int my);
+void ff_put_vp8_epel4_h4_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_h6_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_v4_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_v6_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+
+void ff_put_vp8_epel8_h4_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_h6_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_v4_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_v6_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+
+void ff_put_vp8_epel4_h4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_h6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_v4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel4_v6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_h4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_h6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_v4_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+void ff_put_vp8_epel8_v6_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                uint8_t *src, ptrdiff_t srcstride,
+                                int height, int mx, int my);
+
+void ff_put_vp8_bilinear4_h_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear8_h_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear4_h_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear8_h_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+
+void ff_put_vp8_bilinear4_v_mmxext(uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear8_v_sse2  (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear4_v_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+void ff_put_vp8_bilinear8_v_ssse3 (uint8_t *dst, ptrdiff_t dststride,
+                                   uint8_t *src, ptrdiff_t srcstride,
+                                   int height, int mx, int my);
+
+
+void ff_put_vp8_pixels8_mmx (uint8_t *dst, ptrdiff_t dststride,
+                             uint8_t *src, ptrdiff_t srcstride,
+                             int height, int mx, int my);
+void ff_put_vp8_pixels16_mmx(uint8_t *dst, ptrdiff_t dststride,
+                             uint8_t *src, ptrdiff_t srcstride,
+                             int height, int mx, int my);
+void ff_put_vp8_pixels16_sse(uint8_t *dst, ptrdiff_t dststride,
+                             uint8_t *src, ptrdiff_t srcstride,
+                             int height, int mx, int my);
 
 #define TAP_W16(OPT, FILTERTYPE, TAPTYPE) \
 static void ff_put_vp8_ ## FILTERTYPE ## 16_ ## TAPTYPE ## _ ## OPT( \
@@ -230,58 +230,56 @@ HVBILIN(ssse3, 8,  4,  8)
 HVBILIN(ssse3, 8,  8, 16)
 HVBILIN(ssse3, 8, 16, 16)
 
-extern void ff_vp8_idct_dc_add_mmx(uint8_t *dst, int16_t block[16],
-                                   ptrdiff_t stride);
-extern void ff_vp8_idct_dc_add_sse4(uint8_t *dst, int16_t block[16],
-                                    ptrdiff_t stride);
-extern void ff_vp8_idct_dc_add4y_mmx(uint8_t *dst, int16_t block[4][16],
-                                      ptrdiff_t stride);
-extern void ff_vp8_idct_dc_add4y_sse2(uint8_t *dst, int16_t block[4][16],
-                                      ptrdiff_t stride);
-extern void ff_vp8_idct_dc_add4uv_mmx(uint8_t *dst, int16_t block[2][16],
-                                      ptrdiff_t stride);
-extern void ff_vp8_luma_dc_wht_mmx(int16_t block[4][4][16], int16_t dc[16]);
-extern void ff_vp8_luma_dc_wht_sse(int16_t block[4][4][16], int16_t dc[16]);
-extern void ff_vp8_idct_add_mmx(uint8_t *dst, int16_t block[16],
-                                ptrdiff_t stride);
-extern void ff_vp8_idct_add_sse(uint8_t *dst, int16_t block[16],
-                                ptrdiff_t stride);
-
-#define DECLARE_LOOP_FILTER(NAME)\
-extern void ff_vp8_v_loop_filter_simple_ ## NAME(uint8_t *dst, \
-                                                 ptrdiff_t stride, \
-                                                 int flim);\
-extern void ff_vp8_h_loop_filter_simple_ ## NAME(uint8_t *dst, \
-                                                 ptrdiff_t stride, \
-                                                 int flim);\
-extern void ff_vp8_v_loop_filter16y_inner_ ## NAME (uint8_t *dst, \
-                                                     ptrdiff_t stride,\
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_h_loop_filter16y_inner_ ## NAME (uint8_t *dst, \
-                                                    ptrdiff_t stride,\
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_v_loop_filter8uv_inner_ ## NAME (uint8_t *dstU, \
-                                                    uint8_t *dstV,\
-                                                    ptrdiff_t s, \
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_h_loop_filter8uv_inner_ ## NAME (uint8_t *dstU, \
-                                                    uint8_t *dstV,\
-                                                    ptrdiff_t s, \
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_v_loop_filter16y_mbedge_ ## NAME(uint8_t *dst, \
-                                                    ptrdiff_t stride,\
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_h_loop_filter16y_mbedge_ ## NAME(uint8_t *dst, \
-                                                    ptrdiff_t stride,\
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_v_loop_filter8uv_mbedge_ ## NAME(uint8_t *dstU, \
-                                                    uint8_t *dstV,\
-                                                    ptrdiff_t s, \
-                                                    int e, int i, int hvt);\
-extern void ff_vp8_h_loop_filter8uv_mbedge_ ## NAME(uint8_t *dstU, \
-                                                    uint8_t *dstV,\
-                                                    ptrdiff_t s, \
-                                                    int e, int i, int hvt);
+void ff_vp8_idct_dc_add_mmx(uint8_t *dst, int16_t block[16],
+                            ptrdiff_t stride);
+void ff_vp8_idct_dc_add_sse4(uint8_t *dst, int16_t block[16],
+                             ptrdiff_t stride);
+void ff_vp8_idct_dc_add4y_mmx(uint8_t *dst, int16_t block[4][16],
+                               ptrdiff_t stride);
+void ff_vp8_idct_dc_add4y_sse2(uint8_t *dst, int16_t block[4][16],
+                               ptrdiff_t stride);
+void ff_vp8_idct_dc_add4uv_mmx(uint8_t *dst, int16_t block[2][16],
+                               ptrdiff_t stride);
+void ff_vp8_luma_dc_wht_mmx(int16_t block[4][4][16], int16_t dc[16]);
+void ff_vp8_luma_dc_wht_sse(int16_t block[4][4][16], int16_t dc[16]);
+void ff_vp8_idct_add_mmx(uint8_t *dst, int16_t block[16], ptrdiff_t stride);
+void ff_vp8_idct_add_sse(uint8_t *dst, int16_t block[16], ptrdiff_t stride);
+
+#define DECLARE_LOOP_FILTER(NAME)                                       \
+void ff_vp8_v_loop_filter_simple_ ## NAME(uint8_t *dst,                 \
+                                          ptrdiff_t stride,             \
+                                          int flim);                    \
+void ff_vp8_h_loop_filter_simple_ ## NAME(uint8_t *dst,                 \
+                                          ptrdiff_t stride,             \
+                                          int flim);                    \
+void ff_vp8_v_loop_filter16y_inner_ ## NAME (uint8_t *dst,              \
+                                             ptrdiff_t stride,          \
+                                             int e, int i, int hvt);    \
+void ff_vp8_h_loop_filter16y_inner_ ## NAME (uint8_t *dst,              \
+                                             ptrdiff_t stride,          \
+                                             int e, int i, int hvt);    \
+void ff_vp8_v_loop_filter8uv_inner_ ## NAME (uint8_t *dstU,             \
+                                             uint8_t *dstV,             \
+                                             ptrdiff_t s,               \
+                                             int e, int i, int hvt);    \
+void ff_vp8_h_loop_filter8uv_inner_ ## NAME (uint8_t *dstU,             \
+                                             uint8_t *dstV,             \
+                                             ptrdiff_t s,               \
+                                             int e, int i, int hvt);    \
+void ff_vp8_v_loop_filter16y_mbedge_ ## NAME(uint8_t *dst,              \
+                                             ptrdiff_t stride,          \
+                                             int e, int i, int hvt);    \
+void ff_vp8_h_loop_filter16y_mbedge_ ## NAME(uint8_t *dst,              \
+                                             ptrdiff_t stride,          \
+                                             int e, int i, int hvt);    \
+void ff_vp8_v_loop_filter8uv_mbedge_ ## NAME(uint8_t *dstU,             \
+                                             uint8_t *dstV,             \
+                                             ptrdiff_t s,               \
+                                             int e, int i, int hvt);    \
+void ff_vp8_h_loop_filter8uv_mbedge_ ## NAME(uint8_t *dstU,             \
+                                             uint8_t *dstV,             \
+                                             ptrdiff_t s,               \
+                                             int e, int i, int hvt);
 
 DECLARE_LOOP_FILTER(mmx)
 DECLARE_LOOP_FILTER(mmxext)
diff --git a/libavresample/x86/audio_convert_init.c b/libavresample/x86/audio_convert_init.c
index 879108dff1..21104458d3 100644
--- a/libavresample/x86/audio_convert_init.c
+++ b/libavresample/x86/audio_convert_init.c
@@ -25,123 +25,123 @@
 
 /* flat conversions */
 
-extern void ff_conv_s16_to_s32_sse2(int16_t *dst, const int32_t *src, int len);
+void ff_conv_s16_to_s32_sse2(int16_t *dst, const int32_t *src, int len);
 
-extern void ff_conv_s16_to_flt_sse2(float *dst, const int16_t *src, int len);
-extern void ff_conv_s16_to_flt_sse4(float *dst, const int16_t *src, int len);
+void ff_conv_s16_to_flt_sse2(float *dst, const int16_t *src, int len);
+void ff_conv_s16_to_flt_sse4(float *dst, const int16_t *src, int len);
 
-extern void ff_conv_s32_to_s16_mmx (int16_t *dst, const int32_t *src, int len);
-extern void ff_conv_s32_to_s16_sse2(int16_t *dst, const int32_t *src, int len);
+void ff_conv_s32_to_s16_mmx (int16_t *dst, const int32_t *src, int len);
+void ff_conv_s32_to_s16_sse2(int16_t *dst, const int32_t *src, int len);
 
-extern void ff_conv_s32_to_flt_sse2(float *dst, const int32_t *src, int len);
-extern void ff_conv_s32_to_flt_avx (float *dst, const int32_t *src, int len);
+void ff_conv_s32_to_flt_sse2(float *dst, const int32_t *src, int len);
+void ff_conv_s32_to_flt_avx (float *dst, const int32_t *src, int len);
 
-extern void ff_conv_flt_to_s16_sse2(int16_t *dst, const float *src, int len);
+void ff_conv_flt_to_s16_sse2(int16_t *dst, const float *src, int len);
 
-extern void ff_conv_flt_to_s32_sse2(int32_t *dst, const float *src, int len);
-extern void ff_conv_flt_to_s32_avx (int32_t *dst, const float *src, int len);
+void ff_conv_flt_to_s32_sse2(int32_t *dst, const float *src, int len);
+void ff_conv_flt_to_s32_avx (int32_t *dst, const float *src, int len);
 
 /* interleave conversions */
 
-extern void ff_conv_s16p_to_s16_2ch_sse2(int16_t *dst, int16_t *const *src,
-                                         int len, int channels);
-extern void ff_conv_s16p_to_s16_2ch_avx (int16_t *dst, int16_t *const *src,
-                                         int len, int channels);
+void ff_conv_s16p_to_s16_2ch_sse2(int16_t *dst, int16_t *const *src,
+                                  int len, int channels);
+void ff_conv_s16p_to_s16_2ch_avx (int16_t *dst, int16_t *const *src,
+                                  int len, int channels);
 
-extern void ff_conv_s16p_to_s16_6ch_sse2(int16_t *dst, int16_t *const *src,
-                                         int len, int channels);
-extern void ff_conv_s16p_to_s16_6ch_sse2slow(int16_t *dst, int16_t *const *src,
-                                             int len, int channels);
-extern void ff_conv_s16p_to_s16_6ch_avx (int16_t *dst, int16_t *const *src,
-                                         int len, int channels);
+void ff_conv_s16p_to_s16_6ch_sse2(int16_t *dst, int16_t *const *src,
+                                  int len, int channels);
+void ff_conv_s16p_to_s16_6ch_sse2slow(int16_t *dst, int16_t *const *src,
+                                      int len, int channels);
+void ff_conv_s16p_to_s16_6ch_avx (int16_t *dst, int16_t *const *src,
+                                  int len, int channels);
 
-extern void ff_conv_s16p_to_flt_2ch_sse2(float *dst, int16_t *const *src,
-                                         int len, int channels);
-extern void ff_conv_s16p_to_flt_2ch_avx (float *dst, int16_t *const *src,
-                                         int len, int channels);
+void ff_conv_s16p_to_flt_2ch_sse2(float *dst, int16_t *const *src,
+                                  int len, int channels);
+void ff_conv_s16p_to_flt_2ch_avx (float *dst, int16_t *const *src,
+                                  int len, int channels);
 
-extern void ff_conv_s16p_to_flt_6ch_sse2 (float *dst, int16_t *const *src,
-                                          int len, int channels);
-extern void ff_conv_s16p_to_flt_6ch_ssse3(float *dst, int16_t *const *src,
-                                         int len, int channels);
-extern void ff_conv_s16p_to_flt_6ch_avx  (float *dst, int16_t *const *src,
-                                          int len, int channels);
+void ff_conv_s16p_to_flt_6ch_sse2 (float *dst, int16_t *const *src,
+                                   int len, int channels);
+void ff_conv_s16p_to_flt_6ch_ssse3(float *dst, int16_t *const *src,
+                                  int len, int channels);
+void ff_conv_s16p_to_flt_6ch_avx  (float *dst, int16_t *const *src,
+                                   int len, int channels);
 
-extern void ff_conv_fltp_to_s16_2ch_sse2 (int16_t *dst, float *const *src,
-                                          int len, int channels);
-extern void ff_conv_fltp_to_s16_2ch_ssse3(int16_t *dst, float *const *src,
-                                          int len, int channels);
+void ff_conv_fltp_to_s16_2ch_sse2 (int16_t *dst, float *const *src,
+                                   int len, int channels);
+void ff_conv_fltp_to_s16_2ch_ssse3(int16_t *dst, float *const *src,
+                                   int len, int channels);
 
-extern void ff_conv_fltp_to_s16_6ch_sse (int16_t *dst, float *const *src,
-                                         int len, int channels);
-extern void ff_conv_fltp_to_s16_6ch_sse2(int16_t *dst, float *const *src,
-                                         int len, int channels);
-extern void ff_conv_fltp_to_s16_6ch_avx (int16_t *dst, float *const *src,
-                                         int len, int channels);
+void ff_conv_fltp_to_s16_6ch_sse (int16_t *dst, float *const *src,
+                                  int len, int channels);
+void ff_conv_fltp_to_s16_6ch_sse2(int16_t *dst, float *const *src,
+                                  int len, int channels);
+void ff_conv_fltp_to_s16_6ch_avx (int16_t *dst, float *const *src,
+                                  int len, int channels);
 
-extern void ff_conv_fltp_to_flt_2ch_sse(float *dst, float *const *src, int len,
-                                        int channels);
-extern void ff_conv_fltp_to_flt_2ch_avx(float *dst, float *const *src, int len,
-                                        int channels);
+void ff_conv_fltp_to_flt_2ch_sse(float *dst, float *const *src, int len,
+                                 int channels);
+void ff_conv_fltp_to_flt_2ch_avx(float *dst, float *const *src, int len,
+                                 int channels);
 
-extern void ff_conv_fltp_to_flt_6ch_mmx (float *dst, float *const *src, int len,
-                                         int channels);
-extern void ff_conv_fltp_to_flt_6ch_sse4(float *dst, float *const *src, int len,
-                                         int channels);
-extern void ff_conv_fltp_to_flt_6ch_avx (float *dst, float *const *src, int len,
-                                         int channels);
+void ff_conv_fltp_to_flt_6ch_mmx (float *dst, float *const *src, int len,
+                                  int channels);
+void ff_conv_fltp_to_flt_6ch_sse4(float *dst, float *const *src, int len,
+                                  int channels);
+void ff_conv_fltp_to_flt_6ch_avx (float *dst, float *const *src, int len,
+                                  int channels);
 
 /* deinterleave conversions */
 
-extern void ff_conv_s16_to_s16p_2ch_sse2(int16_t *const *dst, int16_t *src,
-                                         int len, int channels);
-extern void ff_conv_s16_to_s16p_2ch_ssse3(int16_t *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_s16p_2ch_avx (int16_t *const *dst, int16_t *src,
-                                         int len, int channels);
+void ff_conv_s16_to_s16p_2ch_sse2(int16_t *const *dst, int16_t *src,
+                                  int len, int channels);
+void ff_conv_s16_to_s16p_2ch_ssse3(int16_t *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_s16p_2ch_avx (int16_t *const *dst, int16_t *src,
+                                  int len, int channels);
 
-extern void ff_conv_s16_to_s16p_6ch_sse2 (int16_t *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_s16p_6ch_ssse3(int16_t *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_s16p_6ch_avx  (int16_t *const *dst, int16_t *src,
-                                          int len, int channels);
+void ff_conv_s16_to_s16p_6ch_sse2 (int16_t *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_s16p_6ch_ssse3(int16_t *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_s16p_6ch_avx  (int16_t *const *dst, int16_t *src,
+                                   int len, int channels);
 
-extern void ff_conv_s16_to_fltp_2ch_sse2(float *const *dst, int16_t *src,
-                                         int len, int channels);
-extern void ff_conv_s16_to_fltp_2ch_avx (float *const *dst, int16_t *src,
-                                         int len, int channels);
+void ff_conv_s16_to_fltp_2ch_sse2(float *const *dst, int16_t *src,
+                                  int len, int channels);
+void ff_conv_s16_to_fltp_2ch_avx (float *const *dst, int16_t *src,
+                                  int len, int channels);
 
-extern void ff_conv_s16_to_fltp_6ch_sse2 (float *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_fltp_6ch_ssse3(float *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_fltp_6ch_sse4 (float *const *dst, int16_t *src,
-                                          int len, int channels);
-extern void ff_conv_s16_to_fltp_6ch_avx  (float *const *dst, int16_t *src,
-                                          int len, int channels);
+void ff_conv_s16_to_fltp_6ch_sse2 (float *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_fltp_6ch_ssse3(float *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_fltp_6ch_sse4 (float *const *dst, int16_t *src,
+                                   int len, int channels);
+void ff_conv_s16_to_fltp_6ch_avx  (float *const *dst, int16_t *src,
+                                   int len, int channels);
 
-extern void ff_conv_flt_to_s16p_2ch_sse2(int16_t *const *dst, float *src,
-                                         int len, int channels);
-extern void ff_conv_flt_to_s16p_2ch_avx (int16_t *const *dst, float *src,
-                                         int len, int channels);
+void ff_conv_flt_to_s16p_2ch_sse2(int16_t *const *dst, float *src,
+                                  int len, int channels);
+void ff_conv_flt_to_s16p_2ch_avx (int16_t *const *dst, float *src,
+                                  int len, int channels);
 
-extern void ff_conv_flt_to_s16p_6ch_sse2 (int16_t *const *dst, float *src,
-                                          int len, int channels);
-extern void ff_conv_flt_to_s16p_6ch_ssse3(int16_t *const *dst, float *src,
-                                          int len, int channels);
-extern void ff_conv_flt_to_s16p_6ch_avx  (int16_t *const *dst, float *src,
-                                          int len, int channels);
+void ff_conv_flt_to_s16p_6ch_sse2 (int16_t *const *dst, float *src,
+                                   int len, int channels);
+void ff_conv_flt_to_s16p_6ch_ssse3(int16_t *const *dst, float *src,
+                                   int len, int channels);
+void ff_conv_flt_to_s16p_6ch_avx  (int16_t *const *dst, float *src,
+                                   int len, int channels);
 
-extern void ff_conv_flt_to_fltp_2ch_sse(float *const *dst, float *src, int len,
-                                        int channels);
-extern void ff_conv_flt_to_fltp_2ch_avx(float *const *dst, float *src, int len,
-                                        int channels);
+void ff_conv_flt_to_fltp_2ch_sse(float *const *dst, float *src, int len,
+                                 int channels);
+void ff_conv_flt_to_fltp_2ch_avx(float *const *dst, float *src, int len,
+                                 int channels);
 
-extern void ff_conv_flt_to_fltp_6ch_sse2(float *const *dst, float *src, int len,
-                                         int channels);
-extern void ff_conv_flt_to_fltp_6ch_avx (float *const *dst, float *src, int len,
-                                         int channels);
+void ff_conv_flt_to_fltp_6ch_sse2(float *const *dst, float *src, int len,
+                                  int channels);
+void ff_conv_flt_to_fltp_6ch_avx (float *const *dst, float *src, int len,
+                                  int channels);
 
 av_cold void ff_audio_convert_init_x86(AudioConvert *ac)
 {
diff --git a/libavresample/x86/audio_mix_init.c b/libavresample/x86/audio_mix_init.c
index 72b2397ad6..9b977f892d 100644
--- a/libavresample/x86/audio_mix_init.c
+++ b/libavresample/x86/audio_mix_init.c
@@ -23,80 +23,80 @@
 #include "libavutil/x86/cpu.h"
 #include "libavresample/audio_mix.h"
 
-extern void ff_mix_2_to_1_fltp_flt_sse(float **src, float **matrix, int len,
-                                       int out_ch, int in_ch);
-extern void ff_mix_2_to_1_fltp_flt_avx(float **src, float **matrix, int len,
-                                       int out_ch, int in_ch);
+void ff_mix_2_to_1_fltp_flt_sse(float **src, float **matrix, int len,
+                                int out_ch, int in_ch);
+void ff_mix_2_to_1_fltp_flt_avx(float **src, float **matrix, int len,
+                                int out_ch, int in_ch);
 
-extern void ff_mix_2_to_1_s16p_flt_sse2(int16_t **src, float **matrix, int len,
-                                        int out_ch, int in_ch);
-extern void ff_mix_2_to_1_s16p_flt_sse4(int16_t **src, float **matrix, int len,
-                                        int out_ch, int in_ch);
+void ff_mix_2_to_1_s16p_flt_sse2(int16_t **src, float **matrix, int len,
+                                 int out_ch, int in_ch);
+void ff_mix_2_to_1_s16p_flt_sse4(int16_t **src, float **matrix, int len,
+                                 int out_ch, int in_ch);
 
-extern void ff_mix_2_to_1_s16p_q8_sse2(int16_t **src, int16_t **matrix,
-                                       int len, int out_ch, int in_ch);
+void ff_mix_2_to_1_s16p_q8_sse2(int16_t **src, int16_t **matrix,
+                                int len, int out_ch, int in_ch);
 
-extern void ff_mix_1_to_2_fltp_flt_sse(float **src, float **matrix, int len,
-                                       int out_ch, int in_ch);
-extern void ff_mix_1_to_2_fltp_flt_avx(float **src, float **matrix, int len,
-                                       int out_ch, int in_ch);
+void ff_mix_1_to_2_fltp_flt_sse(float **src, float **matrix, int len,
+                                int out_ch, int in_ch);
+void ff_mix_1_to_2_fltp_flt_avx(float **src, float **matrix, int len,
+                                int out_ch, int in_ch);
 
-extern void ff_mix_1_to_2_s16p_flt_sse2(int16_t **src, float **matrix, int len,
-                                        int out_ch, int in_ch);
-extern void ff_mix_1_to_2_s16p_flt_sse4(int16_t **src, float **matrix, int len,
-                                        int out_ch, int in_ch);
-extern void ff_mix_1_to_2_s16p_flt_avx (int16_t **src, float **matrix, int len,
-                                        int out_ch, int in_ch);
+void ff_mix_1_to_2_s16p_flt_sse2(int16_t **src, float **matrix, int len,
+                                 int out_ch, int in_ch);
+void ff_mix_1_to_2_s16p_flt_sse4(int16_t **src, float **matrix, int len,
+                                 int out_ch, int in_ch);
+void ff_mix_1_to_2_s16p_flt_avx (int16_t **src, float **matrix, int len,
+                                 int out_ch, int in_ch);
 
-#define DEFINE_MIX_3_8_TO_1_2(chan)                                         \
-extern void ff_mix_ ## chan ## _to_1_fltp_flt_sse(float **src,              \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-extern void ff_mix_ ## chan ## _to_2_fltp_flt_sse(float **src,              \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_s16p_flt_sse2(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-extern void ff_mix_ ## chan ## _to_2_s16p_flt_sse2(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_s16p_flt_sse4(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-extern void ff_mix_ ## chan ## _to_2_s16p_flt_sse4(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_fltp_flt_avx(float **src,              \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-extern void ff_mix_ ## chan ## _to_2_fltp_flt_avx(float **src,              \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_s16p_flt_avx(int16_t **src,            \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-extern void ff_mix_ ## chan ## _to_2_s16p_flt_avx(int16_t **src,            \
-                                                  float **matrix, int len,  \
-                                                  int out_ch, int in_ch);   \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_fltp_flt_fma4(float **src,             \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-extern void ff_mix_ ## chan ## _to_2_fltp_flt_fma4(float **src,             \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-                                                                            \
-extern void ff_mix_ ## chan ## _to_1_s16p_flt_fma4(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);  \
-extern void ff_mix_ ## chan ## _to_2_s16p_flt_fma4(int16_t **src,           \
-                                                   float **matrix, int len, \
-                                                   int out_ch, int in_ch);
+#define DEFINE_MIX_3_8_TO_1_2(chan)                                     \
+void ff_mix_ ## chan ## _to_1_fltp_flt_sse(float **src,                 \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+void ff_mix_ ## chan ## _to_2_fltp_flt_sse(float **src,                 \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_s16p_flt_sse2(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+void ff_mix_ ## chan ## _to_2_s16p_flt_sse2(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_s16p_flt_sse4(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+void ff_mix_ ## chan ## _to_2_s16p_flt_sse4(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_fltp_flt_avx(float **src,                 \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+void ff_mix_ ## chan ## _to_2_fltp_flt_avx(float **src,                 \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_s16p_flt_avx(int16_t **src,               \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+void ff_mix_ ## chan ## _to_2_s16p_flt_avx(int16_t **src,               \
+                                           float **matrix, int len,     \
+                                           int out_ch, int in_ch);      \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_fltp_flt_fma4(float **src,                \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+void ff_mix_ ## chan ## _to_2_fltp_flt_fma4(float **src,                \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+                                                                        \
+void ff_mix_ ## chan ## _to_1_s16p_flt_fma4(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);     \
+void ff_mix_ ## chan ## _to_2_s16p_flt_fma4(int16_t **src,              \
+                                            float **matrix, int len,    \
+                                            int out_ch, int in_ch);
 
 DEFINE_MIX_3_8_TO_1_2(3)
 DEFINE_MIX_3_8_TO_1_2(4)
diff --git a/libavresample/x86/dither_init.c b/libavresample/x86/dither_init.c
index de38398891..cc7e4dc13b 100644
--- a/libavresample/x86/dither_init.c
+++ b/libavresample/x86/dither_init.c
@@ -23,14 +23,13 @@
 #include "libavutil/x86/cpu.h"
 #include "libavresample/dither.h"
 
-extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
-                             int len);
+void ff_quantize_sse2(int16_t *dst, const float *src, float *dither, int len);
 
-extern void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
-extern void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
+void ff_dither_int_to_float_rectangular_sse2(float *dst, int *src, int len);
+void ff_dither_int_to_float_rectangular_avx(float *dst, int *src, int len);
 
-extern void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
-extern void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
+void ff_dither_int_to_float_triangular_sse2(float *dst, int *src0, int len);
+void ff_dither_int_to_float_triangular_avx(float *dst, int *src0, int len);
 
 av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
                                 enum AVResampleDitherMethod method)
diff --git a/libavutil/ppc/float_dsp_altivec.h b/libavutil/ppc/float_dsp_altivec.h
index b484a630e8..87d50a8878 100644
--- a/libavutil/ppc/float_dsp_altivec.h
+++ b/libavutil/ppc/float_dsp_altivec.h
@@ -21,18 +21,18 @@
 #ifndef AVUTIL_PPC_FLOAT_DSP_ALTIVEC_H
 #define AVUTIL_PPC_FLOAT_DSP_ALTIVEC_H
 
-extern void ff_vector_fmul_altivec(float *dst, const float *src0,
-                                   const float *src1, int len);
+void ff_vector_fmul_altivec(float *dst, const float *src0,
+                            const float *src1, int len);
 
-extern void ff_vector_fmul_window_altivec(float *dst, const float *src0,
-                                          const float *src1, const float *win,
-                                          int len);
+void ff_vector_fmul_window_altivec(float *dst, const float *src0,
+                                   const float *src1, const float *win,
+                                   int len);
 
-extern void ff_vector_fmul_add_altivec(float *dst, const float *src0,
-                                       const float *src1, const float *src2,
-                                       int len);
+void ff_vector_fmul_add_altivec(float *dst, const float *src0,
+                                const float *src1, const float *src2,
+                                int len);
 
-extern void ff_vector_fmul_reverse_altivec(float *dst, const float *src0,
-                                           const float *src1, int len);
+void ff_vector_fmul_reverse_altivec(float *dst, const float *src0,
+                                    const float *src1, int len);
 
 #endif /* AVUTIL_PPC_FLOAT_DSP_ALTIVEC_H */
diff --git a/libavutil/x86/float_dsp_init.c b/libavutil/x86/float_dsp_init.c
index 81c9a7d468..b5e9af935f 100644
--- a/libavutil/x86/float_dsp_init.c
+++ b/libavutil/x86/float_dsp_init.c
@@ -23,23 +23,23 @@
 #include "cpu.h"
 #include "asm.h"
 
-extern void ff_vector_fmul_sse(float *dst, const float *src0, const float *src1,
+void ff_vector_fmul_sse(float *dst, const float *src0, const float *src1,
+                        int len);
+void ff_vector_fmul_avx(float *dst, const float *src0, const float *src1,
+                        int len);
+
+void ff_vector_fmac_scalar_sse(float *dst, const float *src, float mul,
                                int len);
-extern void ff_vector_fmul_avx(float *dst, const float *src0, const float *src1,
+void ff_vector_fmac_scalar_avx(float *dst, const float *src, float mul,
                                int len);
 
-extern void ff_vector_fmac_scalar_sse(float *dst, const float *src, float mul,
-                                      int len);
-extern void ff_vector_fmac_scalar_avx(float *dst, const float *src, float mul,
-                                      int len);
-
-extern void ff_vector_fmul_scalar_sse(float *dst, const float *src, float mul,
-                                      int len);
+void ff_vector_fmul_scalar_sse(float *dst, const float *src, float mul,
+                               int len);
 
-extern void ff_vector_dmul_scalar_sse2(double *dst, const double *src,
-                                       double mul, int len);
-extern void ff_vector_dmul_scalar_avx(double *dst, const double *src,
-                                      double mul, int len);
+void ff_vector_dmul_scalar_sse2(double *dst, const double *src,
+                                double mul, int len);
+void ff_vector_dmul_scalar_avx(double *dst, const double *src,
+                               double mul, int len);
 
 void ff_vector_fmul_add_sse(float *dst, const float *src0, const float *src1,
                             const float *src2, int len);
diff --git a/libswscale/x86/swscale.c b/libswscale/x86/swscale.c
index c48e56db4b..059589f681 100644
--- a/libswscale/x86/swscale.c
+++ b/libswscale/x86/swscale.c
@@ -206,7 +206,7 @@ void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufI
 #endif /* HAVE_INLINE_ASM */
 
 #define SCALE_FUNC(filter_n, from_bpc, to_bpc, opt) \
-extern void ff_hscale ## from_bpc ## to ## to_bpc ## _ ## filter_n ## _ ## opt( \
+void ff_hscale ## from_bpc ## to ## to_bpc ## _ ## filter_n ## _ ## opt( \
                                                 SwsContext *c, int16_t *data, \
                                                 int dstW, const uint8_t *src, \
                                                 const int16_t *filter, \
@@ -241,9 +241,9 @@ SCALE_FUNCS_SSE(ssse3);
 SCALE_FUNCS_SSE(sse4);
 
 #define VSCALEX_FUNC(size, opt) \
-extern void ff_yuv2planeX_ ## size ## _ ## opt(const int16_t *filter, int filterSize, \
-                                               const int16_t **src, uint8_t *dest, int dstW, \
-                                               const uint8_t *dither, int offset)
+void ff_yuv2planeX_ ## size ## _ ## opt(const int16_t *filter, int filterSize, \
+                                        const int16_t **src, uint8_t *dest, int dstW, \
+                                        const uint8_t *dither, int offset)
 #define VSCALEX_FUNCS(opt) \
     VSCALEX_FUNC(8,  opt); \
     VSCALEX_FUNC(9,  opt); \
@@ -258,8 +258,8 @@ VSCALEX_FUNC(16, sse4);
 VSCALEX_FUNCS(avx);
 
 #define VSCALE_FUNC(size, opt) \
-extern void ff_yuv2plane1_ ## size ## _ ## opt(const int16_t *src, uint8_t *dst, int dstW, \
-                                               const uint8_t *dither, int offset)
+void ff_yuv2plane1_ ## size ## _ ## opt(const int16_t *src, uint8_t *dst, int dstW, \
+                                        const uint8_t *dither, int offset)
 #define VSCALE_FUNCS(opt1, opt2) \
     VSCALE_FUNC(8,  opt1); \
     VSCALE_FUNC(9,  opt2); \
@@ -274,12 +274,12 @@ VSCALE_FUNC(16, sse4);
 VSCALE_FUNCS(avx, avx);
 
 #define INPUT_Y_FUNC(fmt, opt) \
-extern void ff_ ## fmt ## ToY_  ## opt(uint8_t *dst, const uint8_t *src, \
-                                       int w, uint32_t *unused)
+void ff_ ## fmt ## ToY_  ## opt(uint8_t *dst, const uint8_t *src, \
+                                int w, uint32_t *unused)
 #define INPUT_UV_FUNC(fmt, opt) \
-extern void ff_ ## fmt ## ToUV_ ## opt(uint8_t *dstU, uint8_t *dstV, \
-                                       const uint8_t *src, const uint8_t *unused1, \
-                                       int w, uint32_t *unused2)
+void ff_ ## fmt ## ToUV_ ## opt(uint8_t *dstU, uint8_t *dstV, \
+                                const uint8_t *src, const uint8_t *unused1, \
+                                int w, uint32_t *unused2)
 #define INPUT_FUNC(fmt, opt) \
     INPUT_Y_FUNC(fmt, opt); \
     INPUT_UV_FUNC(fmt, opt)