diff --git a/libavfilter/blend.h b/libavfilter/blend.h
index ff417650cf..b046e062bc 100644
--- a/libavfilter/blend.h
+++ b/libavfilter/blend.h
@@ -81,7 +81,6 @@ typedef struct FilterParams {
                   struct FilterParams *param, double *values, int starty);
 } FilterParams;
 
-void ff_blend_init(FilterParams *param, int depth);
 void ff_blend_init_x86(FilterParams *param, int depth);
 
 #endif /* AVFILTER_BLEND_H */
diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c
index c882086c51..dfe2b8b174 100644
--- a/libavfilter/vf_blend.c
+++ b/libavfilter/vf_blend.c
@@ -20,48 +20,19 @@
 
 #include "config_components.h"
 
-#include "libavutil/imgutils.h"
-#include "libavutil/intfloat.h"
 #include "libavutil/eval.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixfmt.h"
 #include "avfilter.h"
-#include "formats.h"
 #include "framesync.h"
 #include "internal.h"
+#include "vf_blend_init.h"
 #include "video.h"
 #include "blend.h"
 
 #define TOP    0
 #define BOTTOM 1
 
-#define DEPTH 8
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 9
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 10
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 12
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 14
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 16
-#include "blend_modes.c"
-
-#undef DEPTH
-#define DEPTH 32
-#include "blend_modes.c"
-
 typedef struct BlendContext {
     const AVClass *class;
     FFFrameSync fs;
@@ -155,58 +126,6 @@ static const AVOption blend_options[] = {
 
 FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);
 
-#define COPY(src, depth)                                                            \
-static void blend_copy ## src##_##depth(const uint8_t *top, ptrdiff_t top_linesize,    \
-                            const uint8_t *bottom, ptrdiff_t bottom_linesize,\
-                            uint8_t *dst, ptrdiff_t dst_linesize,            \
-                            ptrdiff_t width, ptrdiff_t height,               \
-                            FilterParams *param, double *values, int starty) \
-{                                                                            \
-    av_image_copy_plane(dst, dst_linesize, src, src ## _linesize,            \
-                        width * depth / 8, height);                          \
-}
-
-COPY(top, 8)
-COPY(bottom, 8)
-
-COPY(top, 16)
-COPY(bottom, 16)
-
-COPY(top, 32)
-COPY(bottom, 32)
-
-#undef COPY
-
-#define BLEND_NORMAL(name, type)                                                  \
-static void blend_normal_##name(const uint8_t *_top, ptrdiff_t top_linesize,      \
-                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,\
-                                uint8_t *_dst, ptrdiff_t dst_linesize,            \
-                                ptrdiff_t width, ptrdiff_t height,                \
-                                FilterParams *param, double *values, int starty)  \
-{                                                                                 \
-    const type *top = (type*)_top;                                                \
-    const type *bottom = (type*)_bottom;                                          \
-    type *dst = (type*)_dst;                                                      \
-    const float opacity = param->opacity;                                         \
-                                                                                  \
-    dst_linesize /= sizeof(type);                                                 \
-    top_linesize /= sizeof(type);                                                 \
-    bottom_linesize /= sizeof(type);                                              \
-                                                                                  \
-    for (int i = 0; i < height; i++) {                                            \
-        for (int j = 0; j < width; j++) {                                         \
-            dst[j] = top[j] * opacity + bottom[j] * (1.f - opacity);              \
-        }                                                                         \
-        dst    += dst_linesize;                                                   \
-        top    += top_linesize;                                                   \
-        bottom += bottom_linesize;                                                \
-    }                                                                             \
-}
-
-BLEND_NORMAL(8bit,  uint8_t)
-BLEND_NORMAL(16bit, uint16_t)
-BLEND_NORMAL(32bit, float)
-
 #define DEFINE_BLEND_EXPR(type, name, div)                                     \
 static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize,          \
                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \
@@ -365,99 +284,6 @@ static av_cold void uninit(AVFilterContext *ctx)
         av_expr_free(s->params[i].e);
 }
 
-#define DEFINE_INIT_BLEND_FUNC(depth, nbits)                                          \
-static av_cold void init_blend_func_##depth##_##nbits##bit(FilterParams *param)       \
-{                                                                                     \
-    switch (param->mode) {                                                            \
-    case BLEND_ADDITION:     param->blend = blend_addition_##depth##bit;     break;   \
-    case BLEND_GRAINMERGE:   param->blend = blend_grainmerge_##depth##bit;   break;   \
-    case BLEND_AND:          param->blend = blend_and_##depth##bit;          break;   \
-    case BLEND_AVERAGE:      param->blend = blend_average_##depth##bit;      break;   \
-    case BLEND_BURN:         param->blend = blend_burn_##depth##bit;         break;   \
-    case BLEND_DARKEN:       param->blend = blend_darken_##depth##bit;       break;   \
-    case BLEND_DIFFERENCE:   param->blend = blend_difference_##depth##bit;   break;   \
-    case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_##depth##bit; break;   \
-    case BLEND_DIVIDE:       param->blend = blend_divide_##depth##bit;       break;   \
-    case BLEND_DODGE:        param->blend = blend_dodge_##depth##bit;        break;   \
-    case BLEND_EXCLUSION:    param->blend = blend_exclusion_##depth##bit;    break;   \
-    case BLEND_EXTREMITY:    param->blend = blend_extremity_##depth##bit;    break;   \
-    case BLEND_FREEZE:       param->blend = blend_freeze_##depth##bit;       break;   \
-    case BLEND_GLOW:         param->blend = blend_glow_##depth##bit;         break;   \
-    case BLEND_HARDLIGHT:    param->blend = blend_hardlight_##depth##bit;    break;   \
-    case BLEND_HARDMIX:      param->blend = blend_hardmix_##depth##bit;      break;   \
-    case BLEND_HEAT:         param->blend = blend_heat_##depth##bit;         break;   \
-    case BLEND_LIGHTEN:      param->blend = blend_lighten_##depth##bit;      break;   \
-    case BLEND_LINEARLIGHT:  param->blend = blend_linearlight_##depth##bit;  break;   \
-    case BLEND_MULTIPLY:     param->blend = blend_multiply_##depth##bit;     break;   \
-    case BLEND_MULTIPLY128:  param->blend = blend_multiply128_##depth##bit;  break;   \
-    case BLEND_NEGATION:     param->blend = blend_negation_##depth##bit;     break;   \
-    case BLEND_NORMAL:       param->blend = blend_normal_##nbits##bit;       break;   \
-    case BLEND_OR:           param->blend = blend_or_##depth##bit;           break;   \
-    case BLEND_OVERLAY:      param->blend = blend_overlay_##depth##bit;      break;   \
-    case BLEND_PHOENIX:      param->blend = blend_phoenix_##depth##bit;      break;   \
-    case BLEND_PINLIGHT:     param->blend = blend_pinlight_##depth##bit;     break;   \
-    case BLEND_REFLECT:      param->blend = blend_reflect_##depth##bit;      break;   \
-    case BLEND_SCREEN:       param->blend = blend_screen_##depth##bit;       break;   \
-    case BLEND_SOFTLIGHT:    param->blend = blend_softlight_##depth##bit;    break;   \
-    case BLEND_SUBTRACT:     param->blend = blend_subtract_##depth##bit;     break;   \
-    case BLEND_VIVIDLIGHT:   param->blend = blend_vividlight_##depth##bit;   break;   \
-    case BLEND_XOR:          param->blend = blend_xor_##depth##bit;          break;   \
-    case BLEND_SOFTDIFFERENCE:param->blend=blend_softdifference_##depth##bit;break;   \
-    case BLEND_GEOMETRIC:    param->blend = blend_geometric_##depth##bit;    break;   \
-    case BLEND_HARMONIC:     param->blend = blend_harmonic_##depth##bit;     break;   \
-    case BLEND_BLEACH:       param->blend = blend_bleach_##depth##bit;       break;   \
-    case BLEND_STAIN:        param->blend = blend_stain_##depth##bit;        break;   \
-    case BLEND_INTERPOLATE:  param->blend = blend_interpolate_##depth##bit;  break;   \
-    case BLEND_HARDOVERLAY:  param->blend = blend_hardoverlay_##depth##bit;  break;   \
-    }                                                                                 \
-}
-DEFINE_INIT_BLEND_FUNC(8, 8)
-DEFINE_INIT_BLEND_FUNC(9, 16)
-DEFINE_INIT_BLEND_FUNC(10, 16)
-DEFINE_INIT_BLEND_FUNC(12, 16)
-DEFINE_INIT_BLEND_FUNC(14, 16)
-DEFINE_INIT_BLEND_FUNC(16, 16)
-DEFINE_INIT_BLEND_FUNC(32, 32)
-
-void ff_blend_init(FilterParams *param, int depth)
-{
-    switch (depth) {
-    case 8:
-        init_blend_func_8_8bit(param);
-        break;
-    case 9:
-        init_blend_func_9_16bit(param);
-        break;
-    case 10:
-        init_blend_func_10_16bit(param);
-        break;
-    case 12:
-        init_blend_func_12_16bit(param);
-        break;
-    case 14:
-        init_blend_func_14_16bit(param);
-        break;
-    case 16:
-        init_blend_func_16_16bit(param);
-        break;
-    case 32:
-        init_blend_func_32_32bit(param);
-        break;
-    }
-
-    if (param->opacity == 0 && param->mode != BLEND_NORMAL) {
-        param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;
-    } else if (param->mode == BLEND_NORMAL) {
-        if (param->opacity == 1)
-            param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;
-        else if (param->opacity == 0)
-            param->blend = depth > 8 ? depth > 16 ? blend_copybottom_32 : blend_copybottom_16 : blend_copybottom_8;
-    }
-
-    if (ARCH_X86)
-        ff_blend_init_x86(param, depth);
-}
-
 static int config_params(AVFilterContext *ctx)
 {
     BlendContext *s = ctx->priv;
diff --git a/libavfilter/vf_blend_init.h b/libavfilter/vf_blend_init.h
new file mode 100644
index 0000000000..5fb2599490
--- /dev/null
+++ b/libavfilter/vf_blend_init.h
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2013 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_BLEND_INIT_H
+#define AVFILTER_BLEND_INIT_H
+
+#include "config.h"
+#include "libavutil/attributes.h"
+#include "libavutil/imgutils.h"
+#include "blend.h"
+
+#define DEPTH 8
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 9
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 10
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 12
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 14
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 16
+#include "blend_modes.c"
+
+#undef DEPTH
+#define DEPTH 32
+#include "blend_modes.c"
+
+#define COPY(src, depth)                                                            \
+static void blend_copy ## src##_##depth(const uint8_t *top, ptrdiff_t top_linesize,    \
+                            const uint8_t *bottom, ptrdiff_t bottom_linesize,\
+                            uint8_t *dst, ptrdiff_t dst_linesize,            \
+                            ptrdiff_t width, ptrdiff_t height,               \
+                            FilterParams *param, double *values, int starty) \
+{                                                                            \
+    av_image_copy_plane(dst, dst_linesize, src, src ## _linesize,            \
+                        width * depth / 8, height);                          \
+}
+
+COPY(top, 8)
+COPY(bottom, 8)
+
+COPY(top, 16)
+COPY(bottom, 16)
+
+COPY(top, 32)
+COPY(bottom, 32)
+
+#undef COPY
+
+#define BLEND_NORMAL(name, type)                                                  \
+static void blend_normal_##name(const uint8_t *_top, ptrdiff_t top_linesize,      \
+                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,\
+                                uint8_t *_dst, ptrdiff_t dst_linesize,            \
+                                ptrdiff_t width, ptrdiff_t height,                \
+                                FilterParams *param, double *values, int starty)  \
+{                                                                                 \
+    const type *top = (type*)_top;                                                \
+    const type *bottom = (type*)_bottom;                                          \
+    type *dst = (type*)_dst;                                                      \
+    const float opacity = param->opacity;                                         \
+                                                                                  \
+    dst_linesize /= sizeof(type);                                                 \
+    top_linesize /= sizeof(type);                                                 \
+    bottom_linesize /= sizeof(type);                                              \
+                                                                                  \
+    for (int i = 0; i < height; i++) {                                            \
+        for (int j = 0; j < width; j++) {                                         \
+            dst[j] = top[j] * opacity + bottom[j] * (1.f - opacity);              \
+        }                                                                         \
+        dst    += dst_linesize;                                                   \
+        top    += top_linesize;                                                   \
+        bottom += bottom_linesize;                                                \
+    }                                                                             \
+}
+
+BLEND_NORMAL(8bit,  uint8_t)
+BLEND_NORMAL(16bit, uint16_t)
+BLEND_NORMAL(32bit, float)
+
+#define DEFINE_INIT_BLEND_FUNC(depth, nbits)                                          \
+static av_cold void init_blend_func_##depth##_##nbits##bit(FilterParams *param)       \
+{                                                                                     \
+    switch (param->mode) {                                                            \
+    case BLEND_ADDITION:     param->blend = blend_addition_##depth##bit;     break;   \
+    case BLEND_GRAINMERGE:   param->blend = blend_grainmerge_##depth##bit;   break;   \
+    case BLEND_AND:          param->blend = blend_and_##depth##bit;          break;   \
+    case BLEND_AVERAGE:      param->blend = blend_average_##depth##bit;      break;   \
+    case BLEND_BURN:         param->blend = blend_burn_##depth##bit;         break;   \
+    case BLEND_DARKEN:       param->blend = blend_darken_##depth##bit;       break;   \
+    case BLEND_DIFFERENCE:   param->blend = blend_difference_##depth##bit;   break;   \
+    case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_##depth##bit; break;   \
+    case BLEND_DIVIDE:       param->blend = blend_divide_##depth##bit;       break;   \
+    case BLEND_DODGE:        param->blend = blend_dodge_##depth##bit;        break;   \
+    case BLEND_EXCLUSION:    param->blend = blend_exclusion_##depth##bit;    break;   \
+    case BLEND_EXTREMITY:    param->blend = blend_extremity_##depth##bit;    break;   \
+    case BLEND_FREEZE:       param->blend = blend_freeze_##depth##bit;       break;   \
+    case BLEND_GLOW:         param->blend = blend_glow_##depth##bit;         break;   \
+    case BLEND_HARDLIGHT:    param->blend = blend_hardlight_##depth##bit;    break;   \
+    case BLEND_HARDMIX:      param->blend = blend_hardmix_##depth##bit;      break;   \
+    case BLEND_HEAT:         param->blend = blend_heat_##depth##bit;         break;   \
+    case BLEND_LIGHTEN:      param->blend = blend_lighten_##depth##bit;      break;   \
+    case BLEND_LINEARLIGHT:  param->blend = blend_linearlight_##depth##bit;  break;   \
+    case BLEND_MULTIPLY:     param->blend = blend_multiply_##depth##bit;     break;   \
+    case BLEND_MULTIPLY128:  param->blend = blend_multiply128_##depth##bit;  break;   \
+    case BLEND_NEGATION:     param->blend = blend_negation_##depth##bit;     break;   \
+    case BLEND_NORMAL:       param->blend = blend_normal_##nbits##bit;       break;   \
+    case BLEND_OR:           param->blend = blend_or_##depth##bit;           break;   \
+    case BLEND_OVERLAY:      param->blend = blend_overlay_##depth##bit;      break;   \
+    case BLEND_PHOENIX:      param->blend = blend_phoenix_##depth##bit;      break;   \
+    case BLEND_PINLIGHT:     param->blend = blend_pinlight_##depth##bit;     break;   \
+    case BLEND_REFLECT:      param->blend = blend_reflect_##depth##bit;      break;   \
+    case BLEND_SCREEN:       param->blend = blend_screen_##depth##bit;       break;   \
+    case BLEND_SOFTLIGHT:    param->blend = blend_softlight_##depth##bit;    break;   \
+    case BLEND_SUBTRACT:     param->blend = blend_subtract_##depth##bit;     break;   \
+    case BLEND_VIVIDLIGHT:   param->blend = blend_vividlight_##depth##bit;   break;   \
+    case BLEND_XOR:          param->blend = blend_xor_##depth##bit;          break;   \
+    case BLEND_SOFTDIFFERENCE:param->blend=blend_softdifference_##depth##bit;break;   \
+    case BLEND_GEOMETRIC:    param->blend = blend_geometric_##depth##bit;    break;   \
+    case BLEND_HARMONIC:     param->blend = blend_harmonic_##depth##bit;     break;   \
+    case BLEND_BLEACH:       param->blend = blend_bleach_##depth##bit;       break;   \
+    case BLEND_STAIN:        param->blend = blend_stain_##depth##bit;        break;   \
+    case BLEND_INTERPOLATE:  param->blend = blend_interpolate_##depth##bit;  break;   \
+    case BLEND_HARDOVERLAY:  param->blend = blend_hardoverlay_##depth##bit;  break;   \
+    }                                                                                 \
+}
+DEFINE_INIT_BLEND_FUNC(8, 8)
+DEFINE_INIT_BLEND_FUNC(9, 16)
+DEFINE_INIT_BLEND_FUNC(10, 16)
+DEFINE_INIT_BLEND_FUNC(12, 16)
+DEFINE_INIT_BLEND_FUNC(14, 16)
+DEFINE_INIT_BLEND_FUNC(16, 16)
+DEFINE_INIT_BLEND_FUNC(32, 32)
+
+static av_unused void ff_blend_init(FilterParams *param, int depth)
+{
+    switch (depth) {
+    case 8:
+        init_blend_func_8_8bit(param);
+        break;
+    case 9:
+        init_blend_func_9_16bit(param);
+        break;
+    case 10:
+        init_blend_func_10_16bit(param);
+        break;
+    case 12:
+        init_blend_func_12_16bit(param);
+        break;
+    case 14:
+        init_blend_func_14_16bit(param);
+        break;
+    case 16:
+        init_blend_func_16_16bit(param);
+        break;
+    case 32:
+        init_blend_func_32_32bit(param);
+        break;
+    }
+
+    if (param->opacity == 0 && param->mode != BLEND_NORMAL) {
+        param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;
+    } else if (param->mode == BLEND_NORMAL) {
+        if (param->opacity == 1)
+            param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;
+        else if (param->opacity == 0)
+            param->blend = depth > 8 ? depth > 16 ? blend_copybottom_32 : blend_copybottom_16 : blend_copybottom_8;
+    }
+
+    if (ARCH_X86)
+        ff_blend_init_x86(param, depth);
+}
+
+#endif /* AVFILTER_BLEND_INIT_H */
diff --git a/tests/checkasm/vf_blend.c b/tests/checkasm/vf_blend.c
index bdd21d4986..484ed0b1d8 100644
--- a/tests/checkasm/vf_blend.c
+++ b/tests/checkasm/vf_blend.c
@@ -20,7 +20,7 @@
 
 #include <string.h>
 #include "checkasm.h"
-#include "libavfilter/blend.h"
+#include "libavfilter/vf_blend_init.h"
 #include "libavutil/common.h"
 #include "libavutil/internal.h"
 #include "libavutil/intreadwrite.h"