fft: Split MDCT bits off from FFT

20 files changed, 463 insertions, 243 deletions

diff --git a/libavcodec/aarch64/Makefile b/libavcodec/aarch64/Makefile
index 022ed847a3..311cd2c1e1 100644
--- a/libavcodec/aarch64/Makefile
+++ b/libavcodec/aarch64/Makefile
@@ -7,6 +7,7 @@ OBJS-$(CONFIG_H264PRED)                 += aarch64/h264pred_init.o
 OBJS-$(CONFIG_H264QPEL)                 += aarch64/h264qpel_init_aarch64.o
 OBJS-$(CONFIG_HPELDSP)                  += aarch64/hpeldsp_init_aarch64.o
 OBJS-$(CONFIG_IMDCT15)                  += aarch64/imdct15_init.o
+OBJS-$(CONFIG_MDCT)                     += aarch64/mdct_init.o
 OBJS-$(CONFIG_MPEGAUDIODSP)             += aarch64/mpegaudiodsp_init.o
 OBJS-$(CONFIG_NEON_CLOBBER_TEST)        += aarch64/neontest.o
 OBJS-$(CONFIG_VIDEODSP)                 += aarch64/videodsp_init.o
diff --git a/libavcodec/aarch64/fft_init_aarch64.c b/libavcodec/aarch64/fft_init_aarch64.c
index f85091e676..9cc57d331e 100644
--- a/libavcodec/aarch64/fft_init_aarch64.c
+++ b/libavcodec/aarch64/fft_init_aarch64.c
@@ -18,8 +18,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "config.h"
-
 #include "libavutil/attributes.h"
 #include "libavutil/cpu.h"
 #include "libavutil/aarch64/cpu.h"
@@ -29,10 +27,6 @@
 void ff_fft_permute_neon(FFTContext *s, FFTComplex *z);
 void ff_fft_calc_neon(FFTContext *s, FFTComplex *z);
 
-void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-
 av_cold void ff_fft_init_aarch64(FFTContext *s)
 {
     int cpu_flags = av_get_cpu_flags();
@@ -40,11 +34,5 @@ av_cold void ff_fft_init_aarch64(FFTContext *s)
     if (have_neon(cpu_flags)) {
         s->fft_permute  = ff_fft_permute_neon;
         s->fft_calc     = ff_fft_calc_neon;
-#if CONFIG_MDCT
-        s->imdct_calc   = ff_imdct_calc_neon;
-        s->imdct_half   = ff_imdct_half_neon;
-        s->mdct_calc    = ff_mdct_calc_neon;
-        s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
-#endif
     }
 }
diff --git a/libavcodec/aarch64/mdct_init.c b/libavcodec/aarch64/mdct_init.c
new file mode 100644
index 0000000000..816111ab63
--- /dev/null
+++ b/libavcodec/aarch64/mdct_init.c
@@ -0,0 +1,39 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/aarch64/cpu.h"
+
+#include "libavcodec/fft.h"
+
+void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+av_cold void ff_mdct_init_aarch64(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        s->imdct_calc   = ff_imdct_calc_neon;
+        s->imdct_half   = ff_imdct_half_neon;
+        s->mdct_calc    = ff_mdct_calc_neon;
+        s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
+    }
+}
diff --git a/libavcodec/arm/Makefile b/libavcodec/arm/Makefile
index 89ec23700b..a684c8bee0 100644
--- a/libavcodec/arm/Makefile
+++ b/libavcodec/arm/Makefile
@@ -21,6 +21,8 @@ OBJS-$(CONFIG_IDCTDSP)                 += arm/idctdsp_init_arm.o        \
 OBJS-$(CONFIG_FLACDSP)                 += arm/flacdsp_init_arm.o        \
                                           arm/flacdsp_arm.o
 OBJS-$(CONFIG_G722DSP)                 += arm/g722dsp_init_arm.o
+OBJS-$(CONFIG_MDCT)                    += arm/mdct_init_arm.o           \
+                                          arm/mdct_fixed_init_arm.o
 OBJS-$(CONFIG_ME_CMP)                  += arm/me_cmp_init_arm.o
 OBJS-$(CONFIG_MPEGAUDIODSP)            += arm/mpegaudiodsp_init_arm.o
 OBJS-$(CONFIG_MPEGVIDEO)               += arm/mpegvideo_arm.o
diff --git a/libavcodec/arm/fft_fixed_init_arm.c b/libavcodec/arm/fft_fixed_init_arm.c
index 1f941a163e..5132b0959f 100644
--- a/libavcodec/arm/fft_fixed_init_arm.c
+++ b/libavcodec/arm/fft_fixed_init_arm.c
@@ -26,8 +26,6 @@
 #include "libavcodec/fft.h"
 
 void ff_fft_fixed_calc_neon(FFTContext *s, FFTComplex *z);
-void ff_mdct_fixed_calc_neon(FFTContext *s, FFTSample *o, const FFTSample *i);
-void ff_mdct_fixed_calcw_neon(FFTContext *s, FFTDouble *o, const FFTSample *i);
 
 av_cold void ff_fft_fixed_init_arm(FFTContext *s)
 {
@@ -36,13 +34,5 @@ av_cold void ff_fft_fixed_init_arm(FFTContext *s)
     if (have_neon(cpu_flags)) {
         s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
         s->fft_calc        = ff_fft_fixed_calc_neon;
-
-#if CONFIG_MDCT
-        if (!s->inverse && s->nbits >= 3) {
-            s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
-            s->mdct_calc        = ff_mdct_fixed_calc_neon;
-            s->mdct_calcw       = ff_mdct_fixed_calcw_neon;
-        }
-#endif
     }
 }
diff --git a/libavcodec/arm/fft_init_arm.c b/libavcodec/arm/fft_init_arm.c
index b6c2fd9493..4d047eaf13 100644
--- a/libavcodec/arm/fft_init_arm.c
+++ b/libavcodec/arm/fft_init_arm.c
@@ -29,31 +29,16 @@ void ff_fft_calc_vfp(FFTContext *s, FFTComplex *z);
 void ff_fft_permute_neon(FFTContext *s, FFTComplex *z);
 void ff_fft_calc_neon(FFTContext *s, FFTComplex *z);
 
-void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
-
-void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
-
 av_cold void ff_fft_init_arm(FFTContext *s)
 {
     int cpu_flags = av_get_cpu_flags();
 
     if (have_vfp_vm(cpu_flags)) {
         s->fft_calc     = ff_fft_calc_vfp;
-#if CONFIG_MDCT
-        s->imdct_half   = ff_imdct_half_vfp;
-#endif
     }
 
     if (have_neon(cpu_flags)) {
         s->fft_permute  = ff_fft_permute_neon;
         s->fft_calc     = ff_fft_calc_neon;
-#if CONFIG_MDCT
-        s->imdct_calc   = ff_imdct_calc_neon;
-        s->imdct_half   = ff_imdct_half_neon;
-        s->mdct_calc    = ff_mdct_calc_neon;
-        s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
-#endif
     }
 }
diff --git a/libavcodec/arm/mdct_fixed_init_arm.c b/libavcodec/arm/mdct_fixed_init_arm.c
new file mode 100644
index 0000000000..606c80cbf4
--- /dev/null
+++ b/libavcodec/arm/mdct_fixed_init_arm.c
@@ -0,0 +1,40 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/arm/cpu.h"
+
+#define FFT_FLOAT 0
+#include "libavcodec/fft.h"
+
+void ff_mdct_fixed_calc_neon(FFTContext *s, FFTSample *o, const FFTSample *i);
+void ff_mdct_fixed_calcw_neon(FFTContext *s, FFTDouble *o, const FFTSample *i);
+
+av_cold void ff_mdct_fixed_init_arm(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        if (!s->inverse && s->nbits >= 3) {
+            s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
+            s->mdct_calc        = ff_mdct_fixed_calc_neon;
+            s->mdct_calcw       = ff_mdct_fixed_calcw_neon;
+        }
+    }
+}
diff --git a/libavcodec/arm/mdct_init_arm.c b/libavcodec/arm/mdct_init_arm.c
new file mode 100644
index 0000000000..24678dd8d0
--- /dev/null
+++ b/libavcodec/arm/mdct_init_arm.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/arm/cpu.h"
+
+#include "libavcodec/fft.h"
+
+void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+av_cold void ff_mdct_init_arm(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_vfp_vm(cpu_flags)) {
+        s->imdct_half   = ff_imdct_half_vfp;
+    }
+
+    if (have_neon(cpu_flags)) {
+        s->imdct_calc   = ff_imdct_calc_neon;
+        s->imdct_half   = ff_imdct_half_neon;
+        s->mdct_calc    = ff_mdct_calc_neon;
+        s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
+    }
+}
diff --git a/libavcodec/fft.h b/libavcodec/fft.h
index 7daae24ca3..57dc17f373 100644
--- a/libavcodec/fft.h
+++ b/libavcodec/fft.h
@@ -154,4 +154,11 @@ void ff_fft_end(FFTContext *s);
 int ff_mdct_init(FFTContext *s, int nbits, int inverse, double scale);
 void ff_mdct_end(FFTContext *s);
 
+void ff_mdct_init_aarch64(FFTContext *s);
+void ff_mdct_init_arm(FFTContext *s);
+void ff_mdct_init_ppc(FFTContext *s);
+void ff_mdct_init_x86(FFTContext *s);
+
+void ff_mdct_fixed_init_arm(FFTContext *s);
+
 #endif /* AVCODEC_FFT_H */
diff --git a/libavcodec/fft_template.c b/libavcodec/fft_template.c
index 808f317c17..3642b439b1 100644
--- a/libavcodec/fft_template.c
+++ b/libavcodec/fft_template.c
@@ -151,20 +151,13 @@ av_cold int ff_fft_init(FFTContext *s, int nbits, int inverse)
 
     s->fft_permute = fft_permute_c;
     s->fft_calc    = fft_calc_c;
-#if CONFIG_MDCT
-    s->imdct_calc  = ff_imdct_calc_c;
-    s->imdct_half  = ff_imdct_half_c;
-    s->mdct_calc   = ff_mdct_calc_c;
-#endif
 
 #if FFT_FLOAT
     if (ARCH_AARCH64) ff_fft_init_aarch64(s);
     if (ARCH_ARM)     ff_fft_init_arm(s);
     if (ARCH_PPC)     ff_fft_init_ppc(s);
     if (ARCH_X86)     ff_fft_init_x86(s);
-    if (CONFIG_MDCT)  s->mdct_calcw = s->mdct_calc;
 #else
-    if (CONFIG_MDCT)  s->mdct_calcw = ff_mdct_calcw_c;
     if (ARCH_ARM)     ff_fft_fixed_init_arm(s);
 #endif
 
diff --git a/libavcodec/mdct_template.c b/libavcodec/mdct_template.c
index bad890ef7f..5b3a6ff5aa 100644
--- a/libavcodec/mdct_template.c
+++ b/libavcodec/mdct_template.c
@@ -56,6 +56,26 @@ av_cold int ff_mdct_init(FFTContext *s, int nbits, int inverse, double scale)
     if (ff_fft_init(s, s->mdct_bits - 2, inverse) < 0)
         goto fail;
 
+    s->imdct_calc  = ff_imdct_calc_c;
+    s->imdct_half  = ff_imdct_half_c;
+    s->mdct_calc   = ff_mdct_calc_c;
+
+#if FFT_FLOAT
+    if (ARCH_AARCH64)
+        ff_mdct_init_aarch64(s);
+    if (ARCH_ARM)
+        ff_mdct_init_arm(s);
+    if (ARCH_PPC)
+        ff_mdct_init_ppc(s);
+    if (ARCH_X86)
+        ff_mdct_init_x86(s);
+    s->mdct_calcw  = s->mdct_calc;
+#else
+    s->mdct_calcw  = ff_mdct_calcw_c;
+    if (ARCH_ARM)
+        ff_mdct_fixed_init_arm(s);
+#endif
+
     s->tcos = av_malloc(n/2 * sizeof(FFTSample));
     if (!s->tcos)
         goto fail;
diff --git a/libavcodec/ppc/Makefile b/libavcodec/ppc/Makefile
index 2b6c81be27..759888bc51 100644
--- a/libavcodec/ppc/Makefile
+++ b/libavcodec/ppc/Makefile
@@ -11,6 +11,7 @@ OBJS-$(CONFIG_HPELDSP)                 += ppc/hpeldsp_altivec.o
 OBJS-$(CONFIG_HUFFYUVDSP)              += ppc/huffyuvdsp_altivec.o
 OBJS-$(CONFIG_FDCTDSP)                 += ppc/fdctdsp.o
 OBJS-$(CONFIG_IDCTDSP)                 += ppc/idctdsp.o
+OBJS-$(CONFIG_MDCT)                    += ppc/mdct_init.o
 OBJS-$(CONFIG_ME_CMP)                  += ppc/me_cmp.o
 OBJS-$(CONFIG_MPEGAUDIODSP)            += ppc/mpegaudiodsp_altivec.o
 OBJS-$(CONFIG_MPEGVIDEO)               += ppc/mpegvideo_altivec.o      \
diff --git a/libavcodec/ppc/fft_init.c b/libavcodec/ppc/fft_init.c
index a749900188..56eafb91be 100644
--- a/libavcodec/ppc/fft_init.c
+++ b/libavcodec/ppc/fft_init.c
@@ -1,8 +1,4 @@
 /*
- * FFT/IFFT transforms
- * AltiVec-enabled
- * Copyright (c) 2009 Loren Merritt
- *
  * This file is part of Libav.
  *
  * Libav is free software; you can redistribute it and/or
@@ -21,126 +17,14 @@
  */
 
 #include "config.h"
+
 #include "libavutil/cpu.h"
 #include "libavutil/ppc/cpu.h"
-#include "libavutil/ppc/types_altivec.h"
-#include "libavutil/ppc/util_altivec.h"
-#include "libavcodec/fft.h"
 
-/**
- * Do a complex FFT with the parameters defined in ff_fft_init().
- * The input data must be permuted before with s->revtab table.
- * No 1.0 / sqrt(n) normalization is done.
- * AltiVec-enabled:
- * This code assumes that the 'z' pointer is 16 bytes-aligned.
- * It also assumes all FFTComplex are 8 bytes-aligned pairs of floats.
- */
+#include "libavcodec/fft.h"
 
-void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z);
 void ff_fft_calc_interleave_altivec(FFTContext *s, FFTComplex *z);
 
-#if HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN
-static void imdct_half_altivec(FFTContext *s, FFTSample *output, const FFTSample *input)
-{
-    int j, k;
-    int n = 1 << s->mdct_bits;
-    int n4 = n >> 2;
-    int n8 = n >> 3;
-    int n32 = n >> 5;
-    const uint16_t *revtabj = s->revtab;
-    const uint16_t *revtabk = s->revtab+n4;
-    const vec_f *tcos = (const vec_f*)(s->tcos+n8);
-    const vec_f *tsin = (const vec_f*)(s->tsin+n8);
-    const vec_f *pin = (const vec_f*)(input+n4);
-    vec_f *pout = (vec_f*)(output+n4);
-
-    /* pre rotation */
-    k = n32-1;
-    do {
-        vec_f cos,sin,cos0,sin0,cos1,sin1,re,im,r0,i0,r1,i1,a,b,c,d;
-#define CMULA(p,o0,o1,o2,o3)\
-        a = pin[ k*2+p];                       /* { z[k].re,    z[k].im,    z[k+1].re,  z[k+1].im  } */\
-        b = pin[-k*2-p-1];                     /* { z[-k-2].re, z[-k-2].im, z[-k-1].re, z[-k-1].im } */\
-        re = vec_perm(a, b, vcprm(0,2,s0,s2)); /* { z[k].re,    z[k+1].re,  z[-k-2].re, z[-k-1].re } */\
-        im = vec_perm(a, b, vcprm(s3,s1,3,1)); /* { z[-k-1].im, z[-k-2].im, z[k+1].im,  z[k].im    } */\
-        cos = vec_perm(cos0, cos1, vcprm(o0,o1,s##o2,s##o3)); /* { cos[k], cos[k+1], cos[-k-2], cos[-k-1] } */\
-        sin = vec_perm(sin0, sin1, vcprm(o0,o1,s##o2,s##o3));\
-        r##p = im*cos - re*sin;\
-        i##p = re*cos + im*sin;
-#define STORE2(v,dst)\
-        j = dst;\
-        vec_ste(v, 0, output+j*2);\
-        vec_ste(v, 4, output+j*2);
-#define STORE8(p)\
-        a = vec_perm(r##p, i##p, vcprm(0,s0,0,s0));\
-        b = vec_perm(r##p, i##p, vcprm(1,s1,1,s1));\
-        c = vec_perm(r##p, i##p, vcprm(2,s2,2,s2));\
-        d = vec_perm(r##p, i##p, vcprm(3,s3,3,s3));\
-        STORE2(a, revtabk[ p*2-4]);\
-        STORE2(b, revtabk[ p*2-3]);\
-        STORE2(c, revtabj[-p*2+2]);\
-        STORE2(d, revtabj[-p*2+3]);
-
-        cos0 = tcos[k];
-        sin0 = tsin[k];
-        cos1 = tcos[-k-1];
-        sin1 = tsin[-k-1];
-        CMULA(0, 0,1,2,3);
-        CMULA(1, 2,3,0,1);
-        STORE8(0);
-        STORE8(1);
-        revtabj += 4;
-        revtabk -= 4;
-        k--;
-    } while(k >= 0);
-
-    ff_fft_calc_altivec(s, (FFTComplex*)output);
-
-    /* post rotation + reordering */
-    j = -n32;
-    k = n32-1;
-    do {
-        vec_f cos,sin,re,im,a,b,c,d;
-#define CMULB(d0,d1,o)\
-        re = pout[o*2];\
-        im = pout[o*2+1];\
-        cos = tcos[o];\
-        sin = tsin[o];\
-        d0 = im*sin - re*cos;\
-        d1 = re*sin + im*cos;
-
-        CMULB(a,b,j);
-        CMULB(c,d,k);
-        pout[2*j]   = vec_perm(a, d, vcprm(0,s3,1,s2));
-        pout[2*j+1] = vec_perm(a, d, vcprm(2,s1,3,s0));
-        pout[2*k]   = vec_perm(c, b, vcprm(0,s3,1,s2));
-        pout[2*k+1] = vec_perm(c, b, vcprm(2,s1,3,s0));
-        j++;
-        k--;
-    } while(k >= 0);
-}
-
-static void imdct_calc_altivec(FFTContext *s, FFTSample *output, const FFTSample *input)
-{
-    int k;
-    int n = 1 << s->mdct_bits;
-    int n4 = n >> 2;
-    int n16 = n >> 4;
-    vec_u32 sign = {1U<<31,1U<<31,1U<<31,1U<<31};
-    vec_u32 *p0 = (vec_u32*)(output+n4);
-    vec_u32 *p1 = (vec_u32*)(output+n4*3);
-
-    imdct_half_altivec(s, output + n4, input);
-
-    for (k = 0; k < n16; k++) {
-        vec_u32 a = p0[k] ^ sign;
-        vec_u32 b = p1[-k-1];
-        p0[-k-1] = vec_perm(a, a, vcprm(3,2,1,0));
-        p1[k]    = vec_perm(b, b, vcprm(3,2,1,0));
-    }
-}
-#endif /* HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN */
-
 av_cold void ff_fft_init_ppc(FFTContext *s)
 {
 #if HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN
@@ -148,9 +32,5 @@ av_cold void ff_fft_init_ppc(FFTContext *s)
         return;
 
     s->fft_calc   = ff_fft_calc_interleave_altivec;
-    if (s->mdct_bits >= 5) {
-        s->imdct_calc = imdct_calc_altivec;
-        s->imdct_half = imdct_half_altivec;
-    }
 #endif /* HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN */
 }
diff --git a/libavcodec/ppc/mdct_init.c b/libavcodec/ppc/mdct_init.c
new file mode 100644
index 0000000000..d3582bc00a
--- /dev/null
+++ b/libavcodec/ppc/mdct_init.c
@@ -0,0 +1,154 @@
+/*
+ * FFT/IFFT transforms
+ * AltiVec-enabled
+ * Copyright (c) 2009 Loren Merritt
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "libavutil/cpu.h"
+#include "libavutil/ppc/cpu.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#include "libavcodec/fft.h"
+
+/**
+ * Do a complex FFT with the parameters defined in ff_fft_init().
+ * The input data must be permuted before with s->revtab table.
+ * No 1.0 / sqrt(n) normalization is done.
+ * AltiVec-enabled:
+ * This code assumes that the 'z' pointer is 16 bytes-aligned.
+ * It also assumes all FFTComplex are 8 bytes-aligned pairs of floats.
+ */
+
+void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z);
+
+#if HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN
+static void imdct_half_altivec(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+    int j, k;
+    int n = 1 << s->mdct_bits;
+    int n4 = n >> 2;
+    int n8 = n >> 3;
+    int n32 = n >> 5;
+    const uint16_t *revtabj = s->revtab;
+    const uint16_t *revtabk = s->revtab+n4;
+    const vec_f *tcos = (const vec_f*)(s->tcos+n8);
+    const vec_f *tsin = (const vec_f*)(s->tsin+n8);
+    const vec_f *pin = (const vec_f*)(input+n4);
+    vec_f *pout = (vec_f*)(output+n4);
+
+    /* pre rotation */
+    k = n32-1;
+    do {
+        vec_f cos,sin,cos0,sin0,cos1,sin1,re,im,r0,i0,r1,i1,a,b,c,d;
+#define CMULA(p,o0,o1,o2,o3)\
+        a = pin[ k*2+p];                       /* { z[k].re,    z[k].im,    z[k+1].re,  z[k+1].im  } */\
+        b = pin[-k*2-p-1];                     /* { z[-k-2].re, z[-k-2].im, z[-k-1].re, z[-k-1].im } */\
+        re = vec_perm(a, b, vcprm(0,2,s0,s2)); /* { z[k].re,    z[k+1].re,  z[-k-2].re, z[-k-1].re } */\
+        im = vec_perm(a, b, vcprm(s3,s1,3,1)); /* { z[-k-1].im, z[-k-2].im, z[k+1].im,  z[k].im    } */\
+        cos = vec_perm(cos0, cos1, vcprm(o0,o1,s##o2,s##o3)); /* { cos[k], cos[k+1], cos[-k-2], cos[-k-1] } */\
+        sin = vec_perm(sin0, sin1, vcprm(o0,o1,s##o2,s##o3));\
+        r##p = im*cos - re*sin;\
+        i##p = re*cos + im*sin;
+#define STORE2(v,dst)\
+        j = dst;\
+        vec_ste(v, 0, output+j*2);\
+        vec_ste(v, 4, output+j*2);
+#define STORE8(p)\
+        a = vec_perm(r##p, i##p, vcprm(0,s0,0,s0));\
+        b = vec_perm(r##p, i##p, vcprm(1,s1,1,s1));\
+        c = vec_perm(r##p, i##p, vcprm(2,s2,2,s2));\
+        d = vec_perm(r##p, i##p, vcprm(3,s3,3,s3));\
+        STORE2(a, revtabk[ p*2-4]);\
+        STORE2(b, revtabk[ p*2-3]);\
+        STORE2(c, revtabj[-p*2+2]);\
+        STORE2(d, revtabj[-p*2+3]);
+
+        cos0 = tcos[k];
+        sin0 = tsin[k];
+        cos1 = tcos[-k-1];
+        sin1 = tsin[-k-1];
+        CMULA(0, 0,1,2,3);
+        CMULA(1, 2,3,0,1);
+        STORE8(0);
+        STORE8(1);
+        revtabj += 4;
+        revtabk -= 4;
+        k--;
+    } while(k >= 0);
+
+    ff_fft_calc_altivec(s, (FFTComplex*)output);
+
+    /* post rotation + reordering */
+    j = -n32;
+    k = n32-1;
+    do {
+        vec_f cos,sin,re,im,a,b,c,d;
+#define CMULB(d0,d1,o)\
+        re = pout[o*2];\
+        im = pout[o*2+1];\
+        cos = tcos[o];\
+        sin = tsin[o];\
+        d0 = im*sin - re*cos;\
+        d1 = re*sin + im*cos;
+
+        CMULB(a,b,j);
+        CMULB(c,d,k);
+        pout[2*j]   = vec_perm(a, d, vcprm(0,s3,1,s2));
+        pout[2*j+1] = vec_perm(a, d, vcprm(2,s1,3,s0));
+        pout[2*k]   = vec_perm(c, b, vcprm(0,s3,1,s2));
+        pout[2*k+1] = vec_perm(c, b, vcprm(2,s1,3,s0));
+        j++;
+        k--;
+    } while(k >= 0);
+}
+
+static void imdct_calc_altivec(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+    int k;
+    int n = 1 << s->mdct_bits;
+    int n4 = n >> 2;
+    int n16 = n >> 4;
+    vec_u32 sign = {1U<<31,1U<<31,1U<<31,1U<<31};
+    vec_u32 *p0 = (vec_u32*)(output+n4);
+    vec_u32 *p1 = (vec_u32*)(output+n4*3);
+
+    imdct_half_altivec(s, output + n4, input);
+
+    for (k = 0; k < n16; k++) {
+        vec_u32 a = p0[k] ^ sign;
+        vec_u32 b = p1[-k-1];
+        p0[-k-1] = vec_perm(a, a, vcprm(3,2,1,0));
+        p1[k]    = vec_perm(b, b, vcprm(3,2,1,0));
+    }
+}
+#endif /* HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN */
+
+av_cold void ff_mdct_init_ppc(FFTContext *s)
+{
+#if HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN
+    if (!PPC_ALTIVEC(av_get_cpu_flags()))
+        return;
+
+    if (s->mdct_bits >= 5) {
+        s->imdct_calc = imdct_calc_altivec;
+        s->imdct_half = imdct_half_altivec;
+    }
+#endif /* HAVE_GNU_AS && HAVE_ALTIVEC && HAVE_BIGENDIAN */
+}
diff --git a/libavcodec/x86/Makefile b/libavcodec/x86/Makefile
index 8ae1283141..1a2cfb1d86 100644
--- a/libavcodec/x86/Makefile
+++ b/libavcodec/x86/Makefile
@@ -19,6 +19,7 @@ OBJS-$(CONFIG_HUFFYUVDSP)              += x86/huffyuvdsp_init.o
 OBJS-$(CONFIG_HUFFYUVENCDSP)           += x86/huffyuvencdsp_mmx.o
 OBJS-$(CONFIG_IDCTDSP)                 += x86/idctdsp_init.o
 OBJS-$(CONFIG_LPC)                     += x86/lpc.o
+OBJS-$(CONFIG_MDCT)                    += x86/mdct_init.o
 OBJS-$(CONFIG_ME_CMP)                  += x86/me_cmp_init.o
 OBJS-$(CONFIG_MPEGAUDIODSP)            += x86/mpegaudiodsp.o
 OBJS-$(CONFIG_MPEGVIDEO)               += x86/mpegvideo.o              \
diff --git a/libavcodec/x86/fft.asm b/libavcodec/x86/fft.asm
index d3be72e576..ef007f4eec 100644
--- a/libavcodec/x86/fft.asm
+++ b/libavcodec/x86/fft.asm
@@ -655,68 +655,6 @@ cglobal fft_permute, 2,7,1
     jl      .loopcopy
     REP_RET
 
-%macro IMDCT_CALC_FUNC 0
-cglobal imdct_calc, 3,5,3
-    mov     r3d, [r0 + FFTContext.mdctsize]
-    mov     r4,  [r0 + FFTContext.imdcthalf]
-    add     r1,  r3
-    PUSH    r3
-    PUSH    r1
-%if ARCH_X86_32
-    push    r2
-    push    r1
-    push    r0
-%else
-    sub     rsp, 8+32*WIN64 ; allocate win64 shadow space
-%endif
-    call    r4
-%if ARCH_X86_32
-    add     esp, 12
-%else
-    add     rsp, 8+32*WIN64
-%endif
-    POP     r1
-    POP     r3
-    lea     r0, [r1 + 2*r3]
-    mov     r2, r3
-    sub     r3, mmsize
-    neg     r2
-    mova    m2, [ps_m1m1m1m1]
-.loop:
-%if mmsize == 8
-    PSWAPD  m0, [r1 + r3]
-    PSWAPD  m1, [r0 + r2]
-    pxor    m0, m2
-%else
-    mova    m0, [r1 + r3]
-    mova    m1, [r0 + r2]
-    shufps  m0, m0, 0x1b
-    shufps  m1, m1, 0x1b
-    xorps   m0, m2
-%endif
-    mova [r0 + r3], m1
-    mova [r1 + r2], m0
-    sub     r3, mmsize
-    add     r2, mmsize
-    jl      .loop
-%if cpuflag(3dnow)
-    femms
-    RET
-%else
-    REP_RET
-%endif
-%endmacro
-
-%if ARCH_X86_32
-INIT_MMX 3dnow
-IMDCT_CALC_FUNC
-INIT_MMX 3dnowext
-IMDCT_CALC_FUNC
-%endif
-
-INIT_XMM sse
-IMDCT_CALC_FUNC
-
 %if ARCH_X86_32
 INIT_MMX 3dnow
 %define mulps pfmul
@@ -791,6 +729,70 @@ DECL_FFT 4
 DECL_FFT 4, _interleave
 %endif
 
+%if CONFIG_MDCT
+
+%macro IMDCT_CALC_FUNC 0
+cglobal imdct_calc, 3,5,3
+    mov     r3d, [r0 + FFTContext.mdctsize]
+    mov     r4,  [r0 + FFTContext.imdcthalf]
+    add     r1,  r3
+    PUSH    r3
+    PUSH    r1
+%if ARCH_X86_32
+    push    r2
+    push    r1
+    push    r0
+%else
+    sub     rsp, 8+32*WIN64 ; allocate win64 shadow space
+%endif
+    call    r4
+%if ARCH_X86_32
+    add     esp, 12
+%else
+    add     rsp, 8+32*WIN64
+%endif
+    POP     r1
+    POP     r3
+    lea     r0, [r1 + 2*r3]
+    mov     r2, r3
+    sub     r3, mmsize
+    neg     r2
+    mova    m2, [ps_m1m1m1m1]
+.loop:
+%if mmsize == 8
+    PSWAPD  m0, [r1 + r3]
+    PSWAPD  m1, [r0 + r2]
+    pxor    m0, m2
+%else
+    mova    m0, [r1 + r3]
+    mova    m1, [r0 + r2]
+    shufps  m0, m0, 0x1b
+    shufps  m1, m1, 0x1b
+    xorps   m0, m2
+%endif
+    mova [r0 + r3], m1
+    mova [r1 + r2], m0
+    sub     r3, mmsize
+    add     r2, mmsize
+    jl      .loop
+%if cpuflag(3dnow)
+    femms
+    RET
+%else
+    REP_RET
+%endif
+%endmacro
+
+%if ARCH_X86_32
+INIT_MMX 3dnow
+IMDCT_CALC_FUNC
+INIT_MMX 3dnowext
+IMDCT_CALC_FUNC
+%endif
+
+INIT_XMM sse
+IMDCT_CALC_FUNC
+
 INIT_XMM sse
 %undef mulps
 %undef addps
@@ -1081,3 +1083,5 @@ DECL_IMDCT POSROTATESHUF_3DNOW
 
 INIT_YMM avx
 DECL_IMDCT POSROTATESHUF_AVX
+
+%endif ; CONFIG_MDCT
diff --git a/libavcodec/x86/fft.h b/libavcodec/x86/fft.h
index a604956836..94405d0cb4 100644
--- a/libavcodec/x86/fft.h
+++ b/libavcodec/x86/fft.h
@@ -27,12 +27,4 @@ void ff_fft_calc_sse(FFTContext *s, FFTComplex *z);
 void ff_fft_calc_3dnow(FFTContext *s, FFTComplex *z);
 void ff_fft_calc_3dnowext(FFTContext *s, FFTComplex *z);
 
-void ff_imdct_calc_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_calc_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input);
-void ff_imdct_half_avx(FFTContext *s, FFTSample *output, const FFTSample *input);
-
 #endif /* AVCODEC_X86_FFT_H */
diff --git a/libavcodec/x86/fft_init.c b/libavcodec/x86/fft_init.c
index 2234d76f9d..ed1290997b 100644
--- a/libavcodec/x86/fft_init.c
+++ b/libavcodec/x86/fft_init.c
@@ -30,28 +30,21 @@ av_cold void ff_fft_init_x86(FFTContext *s)
 
 #if ARCH_X86_32
     if (EXTERNAL_AMD3DNOW(cpu_flags)) {
-        s->imdct_calc = ff_imdct_calc_3dnow;
-        s->imdct_half = ff_imdct_half_3dnow;
         s->fft_calc   = ff_fft_calc_3dnow;
     }
 
     if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
-        s->imdct_calc = ff_imdct_calc_3dnowext;
-        s->imdct_half = ff_imdct_half_3dnowext;
         s->fft_calc   = ff_fft_calc_3dnowext;
     }
 #endif /* ARCH_X86_32 */
 
     if (EXTERNAL_SSE(cpu_flags)) {
-        s->imdct_calc  = ff_imdct_calc_sse;
-        s->imdct_half  = ff_imdct_half_sse;
         s->fft_permute = ff_fft_permute_sse;
         s->fft_calc    = ff_fft_calc_sse;
         s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
     }
 
     if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
-        s->imdct_half      = ff_imdct_half_avx;
         s->fft_calc        = ff_fft_calc_avx;
         s->fft_permutation = FF_FFT_PERM_AVX;
     }
diff --git a/libavcodec/x86/mdct.h b/libavcodec/x86/mdct.h
new file mode 100644
index 0000000000..cc107cb86a
--- /dev/null
+++ b/libavcodec/x86/mdct.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_X86_MDCT_H
+#define AVCODEC_X86_MDCT_H
+
+#include "libavcodec/fft.h"
+
+void ff_imdct_calc_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_calc_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_avx(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+#endif /* AVCODEC_X86_MDCT_H */
diff --git a/libavcodec/x86/mdct_init.c b/libavcodec/x86/mdct_init.c
new file mode 100644
index 0000000000..db642d863d
--- /dev/null
+++ b/libavcodec/x86/mdct_init.c
@@ -0,0 +1,51 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/x86/cpu.h"
+
+#include "mdct.h"
+
+av_cold void ff_mdct_init_x86(FFTContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+#if ARCH_X86_32
+    if (EXTERNAL_AMD3DNOW(cpu_flags)) {
+        s->imdct_calc = ff_imdct_calc_3dnow;
+        s->imdct_half = ff_imdct_half_3dnow;
+    }
+
+    if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
+        s->imdct_calc = ff_imdct_calc_3dnowext;
+        s->imdct_half = ff_imdct_half_3dnowext;
+    }
+#endif /* ARCH_X86_32 */
+
+    if (EXTERNAL_SSE(cpu_flags)) {
+        s->imdct_calc  = ff_imdct_calc_sse;
+        s->imdct_half  = ff_imdct_half_sse;
+    }
+
+    if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
+        s->imdct_half      = ff_imdct_half_avx;
+    }
+}