xvididct: Ensure that the scantable permutation is always set correctly

This fixes cases where the scantable permuation would get overwritten by
the general idctdsp initialization.

1 files changed, 2 insertions, 13 deletions

diff --git a/libavcodec/x86/xvididct_init.c b/libavcodec/x86/xvididct_init.c
index 3112fb5..d5d8ac9 100644
--- a/libavcodec/x86/xvididct_init.c
+++ b/libavcodec/x86/xvididct_init.c
@@ -25,17 +25,6 @@
 #include "idct_xvid.h"
 #include "idctdsp.h"
 
-static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
-
-static av_cold void init_scantable_permutation_sse2(uint8_t *idct_permutation,
-                                                    enum idct_permutation_type perm_type)
-{
-    int i;
-
-    for (i = 0; i < 64; i++)
-        idct_permutation[i] = (i & 0x38) | idct_sse2_row_perm[i & 7];
-}
-
 av_cold void ff_xvididct_init_x86(IDCTDSPContext *c)
 {
     int cpu_flags = av_get_cpu_flags();
@@ -44,12 +33,14 @@ av_cold void ff_xvididct_init_x86(IDCTDSPContext *c)
         c->idct_put  = ff_idct_xvid_mmx_put;
         c->idct_add  = ff_idct_xvid_mmx_add;
         c->idct      = ff_idct_xvid_mmx;
+        c->perm_type = FF_IDCT_PERM_NONE;
     }
 
     if (INLINE_MMXEXT(cpu_flags)) {
         c->idct_put  = ff_idct_xvid_mmxext_put;
         c->idct_add  = ff_idct_xvid_mmxext_add;
         c->idct      = ff_idct_xvid_mmxext;
+        c->perm_type = FF_IDCT_PERM_NONE;
     }
 
     if (INLINE_SSE2(cpu_flags)) {
@@ -57,7 +48,5 @@ av_cold void ff_xvididct_init_x86(IDCTDSPContext *c)
         c->idct_add  = ff_idct_xvid_sse2_add;
         c->idct      = ff_idct_xvid_sse2;
         c->perm_type = FF_IDCT_PERM_SSE2;
-
-        init_scantable_permutation_sse2(c->idct_permutation, c->perm_type);
     }
 }