diff --git a/libavcodec/ac3dsp.c b/libavcodec/ac3dsp.c
index ef19f6a449..e792bcfce5 100644
--- a/libavcodec/ac3dsp.c
+++ b/libavcodec/ac3dsp.c
@@ -23,6 +23,7 @@
 #include "avcodec.h"
 #include "ac3.h"
 #include "ac3dsp.h"
+#include "mathops.h"
 
 static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
 {
@@ -196,6 +197,19 @@ static void ac3_downmix_c(float **samples, float (*matrix)[2],
     }
 }
 
+static void apply_window_int16_c(int16_t *output, const int16_t *input,
+                                 const int16_t *window, unsigned int len)
+{
+    int i;
+    int len2 = len >> 1;
+
+    for (i = 0; i < len2; i++) {
+        int16_t w       = window[i];
+        output[i]       = (MUL16(input[i],       w) + (1 << 14)) >> 15;
+        output[len-i-1] = (MUL16(input[len-i-1], w) + (1 << 14)) >> 15;
+    }
+}
+
 av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
 {
     c->ac3_exponent_min = ac3_exponent_min_c;
@@ -208,6 +222,7 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
     c->compute_mantissa_size = ac3_compute_mantissa_size_c;
     c->extract_exponents = ac3_extract_exponents_c;
     c->downmix = ac3_downmix_c;
+    c->apply_window_int16 = apply_window_int16_c;
 
     if (ARCH_ARM)
         ff_ac3dsp_init_arm(c, bit_exact);
diff --git a/libavcodec/ac3dsp.h b/libavcodec/ac3dsp.h
index 882eb7681a..e350c8824d 100644
--- a/libavcodec/ac3dsp.h
+++ b/libavcodec/ac3dsp.h
@@ -128,6 +128,20 @@ typedef struct AC3DSPContext {
 
     void (*downmix)(float **samples, float (*matrix)[2], int out_ch,
                     int in_ch, int len);
+
+    /**
+     * Apply symmetric window in 16-bit fixed-point.
+     * @param output destination array
+     *               constraints: 16-byte aligned
+     * @param input  source array
+     *               constraints: 16-byte aligned
+     * @param window window array
+     *               constraints: 16-byte aligned, at least len/2 elements
+     * @param len    full window length
+     *               constraints: multiple of ? greater than zero
+     */
+    void (*apply_window_int16)(int16_t *output, const int16_t *input,
+                               const int16_t *window, unsigned int len);
 } AC3DSPContext;
 
 void ff_ac3dsp_init    (AC3DSPContext *c, int bit_exact);
diff --git a/libavcodec/ac3enc_fixed.c b/libavcodec/ac3enc_fixed.c
index 6e251899d8..7d0ddab11b 100644
--- a/libavcodec/ac3enc_fixed.c
+++ b/libavcodec/ac3enc_fixed.c
@@ -65,17 +65,6 @@ av_cold int AC3_NAME(mdct_init)(AC3EncodeContext *s)
 }
 
 
-/*
- * Apply KBD window to input samples prior to MDCT.
- */
-static void apply_window(void *dsp, int16_t *output, const int16_t *input,
-                         const int16_t *window, unsigned int len)
-{
-    DSPContext *dsp0 = dsp;
-    dsp0->apply_window_int16(output, input, window, len);
-}
-
-
 /*
  * Normalize the input samples to use the maximum available precision.
  * This assumes signed 16-bit input samples.
diff --git a/libavcodec/ac3enc_float.c b/libavcodec/ac3enc_float.c
index 86a5cff95f..71db68cbef 100644
--- a/libavcodec/ac3enc_float.c
+++ b/libavcodec/ac3enc_float.c
@@ -83,18 +83,6 @@ av_cold int ff_ac3_float_mdct_init(AC3EncodeContext *s)
 }
 
 
-/*
- * Apply KBD window to input samples prior to MDCT.
- */
-static void apply_window(void *dsp, float *output,
-                         const float *input, const float *window,
-                         unsigned int len)
-{
-    AVFloatDSPContext *fdsp = dsp;
-    fdsp->vector_fmul(output, input, window, len);
-}
-
-
 /*
  * Normalize the input samples.
  * Not needed for the floating-point encoder.
diff --git a/libavcodec/ac3enc_template.c b/libavcodec/ac3enc_template.c
index ae9100c3ac..1b887268ed 100644
--- a/libavcodec/ac3enc_template.c
+++ b/libavcodec/ac3enc_template.c
@@ -34,10 +34,6 @@
 
 static void scale_coefficients(AC3EncodeContext *s);
 
-static void apply_window(void *dsp, SampleType *output,
-                         const SampleType *input, const SampleType *window,
-                         unsigned int len);
-
 static int normalize_samples(AC3EncodeContext *s);
 
 static void clip_coefficients(DSPContext *dsp, CoefType *coef, unsigned int len);
@@ -102,11 +98,11 @@ static void apply_mdct(AC3EncodeContext *s)
             const SampleType *input_samples = &s->planar_samples[ch][blk * AC3_BLOCK_SIZE];
 
 #if CONFIG_AC3ENC_FLOAT
-            apply_window(&s->fdsp, s->windowed_samples, input_samples,
-                         s->mdct_window, AC3_WINDOW_SIZE);
+            s->fdsp.vector_fmul(s->windowed_samples, input_samples,
+                                s->mdct_window, AC3_WINDOW_SIZE);
 #else
-            apply_window(&s->dsp, s->windowed_samples, input_samples,
-                         s->mdct_window, AC3_WINDOW_SIZE);
+            s->ac3dsp.apply_window_int16(s->windowed_samples, input_samples,
+                                         s->mdct_window, AC3_WINDOW_SIZE);
 #endif
 
             if (s->fixed_point)
diff --git a/libavcodec/arm/ac3dsp_init_arm.c b/libavcodec/arm/ac3dsp_init_arm.c
index d7cb95b669..a48353a099 100644
--- a/libavcodec/arm/ac3dsp_init_arm.c
+++ b/libavcodec/arm/ac3dsp_init_arm.c
@@ -31,6 +31,8 @@ void ff_ac3_lshift_int16_neon(int16_t *src, unsigned len, unsigned shift);
 void ff_ac3_rshift_int32_neon(int32_t *src, unsigned len, unsigned shift);
 void ff_float_to_fixed24_neon(int32_t *dst, const float *src, unsigned int len);
 void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
+void ff_apply_window_int16_neon(int16_t *dst, const int16_t *src,
+                                const int16_t *window, unsigned n);
 
 void ff_ac3_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd,
                                      int start, int end,
@@ -56,5 +58,6 @@ av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact)
         c->ac3_rshift_int32      = ff_ac3_rshift_int32_neon;
         c->float_to_fixed24      = ff_float_to_fixed24_neon;
         c->extract_exponents     = ff_ac3_extract_exponents_neon;
+        c->apply_window_int16    = ff_apply_window_int16_neon;
     }
 }
diff --git a/libavcodec/arm/ac3dsp_neon.S b/libavcodec/arm/ac3dsp_neon.S
index 82ff8af9fb..f97b1907df 100644
--- a/libavcodec/arm/ac3dsp_neon.S
+++ b/libavcodec/arm/ac3dsp_neon.S
@@ -108,3 +108,26 @@ function ff_ac3_extract_exponents_neon, export=1
         bgt             1b
         bx              lr
 endfunc
+
+function ff_apply_window_int16_neon, export=1
+        push            {r4,lr}
+        add             r4,  r1,  r3,  lsl #1
+        add             lr,  r0,  r3,  lsl #1
+        sub             r4,  r4,  #16
+        sub             lr,  lr,  #16
+        mov             r12, #-16
+1:
+        vld1.16         {q0},     [r1,:128]!
+        vld1.16         {q2},     [r2,:128]!
+        vld1.16         {q1},     [r4,:128], r12
+        vrev64.16       q3,  q2
+        vqrdmulh.s16    q0,  q0,  q2
+        vqrdmulh.s16    d2,  d2,  d7
+        vqrdmulh.s16    d3,  d3,  d6
+        vst1.16         {q0},     [r0,:128]!
+        vst1.16         {q1},     [lr,:128], r12
+        subs            r3,  r3,  #16
+        bgt             1b
+
+        pop             {r4,pc}
+endfunc
diff --git a/libavcodec/arm/dsputil_init_neon.c b/libavcodec/arm/dsputil_init_neon.c
index 793fab1cf8..0926c84428 100644
--- a/libavcodec/arm/dsputil_init_neon.c
+++ b/libavcodec/arm/dsputil_init_neon.c
@@ -45,9 +45,6 @@ int32_t ff_scalarproduct_int16_neon(const int16_t *v1, const int16_t *v2, int le
 int32_t ff_scalarproduct_and_madd_int16_neon(int16_t *v1, const int16_t *v2,
                                              const int16_t *v3, int len, int mul);
 
-void ff_apply_window_int16_neon(int16_t *dst, const int16_t *src,
-                                const int16_t *window, unsigned n);
-
 av_cold void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
 {
     const int high_bit_depth = avctx->bits_per_raw_sample > 8;
@@ -76,6 +73,4 @@ av_cold void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
 
     c->scalarproduct_int16 = ff_scalarproduct_int16_neon;
     c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_neon;
-
-    c->apply_window_int16 = ff_apply_window_int16_neon;
 }
diff --git a/libavcodec/arm/dsputil_neon.S b/libavcodec/arm/dsputil_neon.S
index 81662c04ad..e30bd10b17 100644
--- a/libavcodec/arm/dsputil_neon.S
+++ b/libavcodec/arm/dsputil_neon.S
@@ -169,29 +169,6 @@ NOVFP   ldr             r2,  [sp]
         bx              lr
 endfunc
 
-function ff_apply_window_int16_neon, export=1
-        push            {r4,lr}
-        add             r4,  r1,  r3,  lsl #1
-        add             lr,  r0,  r3,  lsl #1
-        sub             r4,  r4,  #16
-        sub             lr,  lr,  #16
-        mov             r12, #-16
-1:
-        vld1.16         {q0},     [r1,:128]!
-        vld1.16         {q2},     [r2,:128]!
-        vld1.16         {q1},     [r4,:128], r12
-        vrev64.16       q3,  q2
-        vqrdmulh.s16    q0,  q0,  q2
-        vqrdmulh.s16    d2,  d2,  d7
-        vqrdmulh.s16    d3,  d3,  d6
-        vst1.16         {q0},     [r0,:128]!
-        vst1.16         {q1},     [lr,:128], r12
-        subs            r3,  r3,  #16
-        bgt             1b
-
-        pop             {r4,pc}
-endfunc
-
 function ff_vector_clip_int32_neon, export=1
         vdup.32         q0,  r2
         vdup.32         q1,  r3
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 2aac64f09b..56207e805b 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -2380,19 +2380,6 @@ static int32_t scalarproduct_and_madd_int16_c(int16_t *v1, const int16_t *v2, co
     return res;
 }
 
-static void apply_window_int16_c(int16_t *output, const int16_t *input,
-                                 const int16_t *window, unsigned int len)
-{
-    int i;
-    int len2 = len >> 1;
-
-    for (i = 0; i < len2; i++) {
-        int16_t w       = window[i];
-        output[i]       = (MUL16(input[i],       w) + (1 << 14)) >> 15;
-        output[len-i-1] = (MUL16(input[len-i-1], w) + (1 << 14)) >> 15;
-    }
-}
-
 static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min,
                                 int32_t max, unsigned int len)
 {
@@ -2628,7 +2615,6 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->vector_clipf = vector_clipf_c;
     c->scalarproduct_int16 = scalarproduct_int16_c;
     c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_c;
-    c->apply_window_int16 = apply_window_int16_c;
     c->vector_clip_int32 = vector_clip_int32_c;
 
     c->shrink[0]= av_image_copy_plane;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index f571a9927d..7bd92e53d3 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -271,20 +271,6 @@ typedef struct DSPContext {
      */
     int32_t (*scalarproduct_and_madd_int16)(int16_t *v1/*align 16*/, const int16_t *v2, const int16_t *v3, int len, int mul);
 
-    /**
-     * Apply symmetric window in 16-bit fixed-point.
-     * @param output destination array
-     *               constraints: 16-byte aligned
-     * @param input  source array
-     *               constraints: 16-byte aligned
-     * @param window window array
-     *               constraints: 16-byte aligned, at least len/2 elements
-     * @param len    full window length
-     *               constraints: multiple of ? greater than zero
-     */
-    void (*apply_window_int16)(int16_t *output, const int16_t *input,
-                               const int16_t *window, unsigned int len);
-
     /**
      * Clip each element in an array of int32_t to a given minimum and maximum value.
      * @param dst  destination array
diff --git a/libavcodec/x86/ac3dsp_init.c b/libavcodec/x86/ac3dsp_init.c
index ca10864323..9fbed3c0b4 100644
--- a/libavcodec/x86/ac3dsp_init.c
+++ b/libavcodec/x86/ac3dsp_init.c
@@ -51,6 +51,19 @@ 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);
 
+void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input,
+                                        const int16_t *window, unsigned int len);
+void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input,
+                                      const int16_t *window, unsigned int len);
+void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input,
+                                  const int16_t *window, unsigned int len);
+void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input,
+                                const int16_t *window, unsigned int len);
+void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input,
+                                 const int16_t *window, unsigned int len);
+void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
+                                      const int16_t *window, unsigned int len);
+
 #if HAVE_SSE_INLINE && HAVE_7REGS
 
 #define IF1(x) x
@@ -196,6 +209,11 @@ av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
     if (EXTERNAL_MMXEXT(cpu_flags)) {
         c->ac3_exponent_min = ff_ac3_exponent_min_mmxext;
         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext;
+        if (bit_exact) {
+            c->apply_window_int16 = ff_apply_window_int16_mmxext;
+        } else {
+            c->apply_window_int16 = ff_apply_window_int16_round_mmxext;
+        }
     }
     if (EXTERNAL_SSE(cpu_flags)) {
         c->float_to_fixed24 = ff_float_to_fixed24_sse;
@@ -210,11 +228,19 @@ av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact)
             c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2;
             c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2;
         }
+        if (bit_exact) {
+            c->apply_window_int16 = ff_apply_window_int16_sse2;
+        } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
+            c->apply_window_int16 = ff_apply_window_int16_round_sse2;
+        }
     }
     if (EXTERNAL_SSSE3(cpu_flags)) {
         c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3;
-        if (!(cpu_flags & AV_CPU_FLAG_ATOM)) {
+        if (cpu_flags & AV_CPU_FLAG_ATOM) {
+            c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;
+        } else {
             c->extract_exponents = ff_ac3_extract_exponents_ssse3;
+            c->apply_window_int16 = ff_apply_window_int16_ssse3;
         }
     }
 
diff --git a/libavcodec/x86/dsputil_init.c b/libavcodec/x86/dsputil_init.c
index 2ac93516ca..c339e8fdd0 100644
--- a/libavcodec/x86/dsputil_init.c
+++ b/libavcodec/x86/dsputil_init.c
@@ -83,19 +83,6 @@ int32_t ff_scalarproduct_and_madd_int16_ssse3(int16_t *v1, const int16_t *v2,
                                               const int16_t *v3,
                                               int order, int mul);
 
-void ff_apply_window_int16_round_mmxext(int16_t *output, const int16_t *input,
-                                        const int16_t *window, unsigned int len);
-void ff_apply_window_int16_round_sse2(int16_t *output, const int16_t *input,
-                                      const int16_t *window, unsigned int len);
-void ff_apply_window_int16_mmxext(int16_t *output, const int16_t *input,
-                                  const int16_t *window, unsigned int len);
-void ff_apply_window_int16_sse2(int16_t *output, const int16_t *input,
-                                const int16_t *window, unsigned int len);
-void ff_apply_window_int16_ssse3(int16_t *output, const int16_t *input,
-                                 const int16_t *window, unsigned int len);
-void ff_apply_window_int16_ssse3_atom(int16_t *output, const int16_t *input,
-                                      const int16_t *window, unsigned int len);
-
 void ff_bswap32_buf_ssse3(uint32_t *dst, const uint32_t *src, int w);
 void ff_bswap32_buf_sse2(uint32_t *dst, const uint32_t *src, int w);
 
@@ -596,12 +583,6 @@ static av_cold void dsputil_init_mmxext(DSPContext *c, AVCodecContext *avctx,
 
     c->scalarproduct_int16          = ff_scalarproduct_int16_mmxext;
     c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_mmxext;
-
-    if (avctx->flags & CODEC_FLAG_BITEXACT) {
-        c->apply_window_int16 = ff_apply_window_int16_mmxext;
-    } else {
-        c->apply_window_int16 = ff_apply_window_int16_round_mmxext;
-    }
 #endif /* HAVE_MMXEXT_EXTERNAL */
 }
 
@@ -651,11 +632,6 @@ static av_cold void dsputil_init_sse2(DSPContext *c, AVCodecContext *avctx,
     } else {
         c->vector_clip_int32 = ff_vector_clip_int32_sse2;
     }
-    if (avctx->flags & CODEC_FLAG_BITEXACT) {
-        c->apply_window_int16 = ff_apply_window_int16_sse2;
-    } else if (!(cpu_flags & AV_CPU_FLAG_SSE2SLOW)) {
-        c->apply_window_int16 = ff_apply_window_int16_round_sse2;
-    }
     c->bswap_buf = ff_bswap32_buf_sse2;
 #endif /* HAVE_SSE2_EXTERNAL */
 }
@@ -668,10 +644,6 @@ static av_cold void dsputil_init_ssse3(DSPContext *c, AVCodecContext *avctx,
     if (cpu_flags & AV_CPU_FLAG_SSE4) // not really SSE4, just slow on Conroe
         c->add_hfyu_left_prediction = ff_add_hfyu_left_prediction_sse4;
 
-    if (cpu_flags & AV_CPU_FLAG_ATOM)
-        c->apply_window_int16 = ff_apply_window_int16_ssse3_atom;
-    else
-        c->apply_window_int16 = ff_apply_window_int16_ssse3;
     if (!(cpu_flags & (AV_CPU_FLAG_SSE42 | AV_CPU_FLAG_3DNOW))) // cachesplit
         c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_ssse3;
     c->bswap_buf = ff_bswap32_buf_ssse3;