idct_permutation_type variable, so the permutation type can quickly be identified

Originally committed as revision 1071 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/armv4l/mpegvideo_arm.c

@@ -44,7 +44,6 @@ void MPV_common_init_armv4l(MpegEncContext *s)
     if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_ARM){
         s->idct_put= arm_idct_put;
         s->idct_add= arm_idct_add;
-        for(i=0; i<64; i++)
-            s->idct_permutation[i]= i;
+        s->idct_permutation_type= FF_NO_IDCT_PERM;
     }
 }

libavcodec/i386/mpegvideo_mmx.c

@@ -25,18 +25,6 @@
 #include "../avcodec.h"
 #include "../simple_idct.h"
 
-/* Input permutation for the simple_idct_mmx */
-static UINT8 simple_mmx_permutation[64]={
-	0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D, 
-	0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D, 
-	0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D, 
-	0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F, 
-	0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F, 
-	0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D, 
-	0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F, 
-	0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
-};
-
 extern UINT8 zigzag_direct_noperm[64];
 extern UINT16 inv_zigzag_direct16[64];
 extern UINT32 inverse[256];
@@ -559,12 +547,11 @@ void MPV_common_init_mmx(MpegEncContext *s)
                 s->dct_quantize= dct_quantize_MMX;
             }
         }
-        
+
         if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SIMPLEMMX){
             s->idct_put= ff_simple_idct_put_mmx;
             s->idct_add= ff_simple_idct_add_mmx;
-            for(i=0; i<64; i++)
-                s->idct_permutation[i]= simple_mmx_permutation[i];
+            s->idct_permutation_type= FF_SIMPLE_IDCT_PERM;
         }else if(idct_algo==FF_IDCT_LIBMPEG2MMX){
             if(mm_flags & MM_MMXEXT){
                 s->idct_put= ff_libmpeg2mmx2_idct_put;
@@ -573,8 +560,7 @@ void MPV_common_init_mmx(MpegEncContext *s)
                 s->idct_put= ff_libmpeg2mmx_idct_put;
                 s->idct_add= ff_libmpeg2mmx_idct_add;
             }
-            for(i=0; i<64; i++)
-                s->idct_permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
+            s->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
         }
     }
 }

libavcodec/mlib/dsputil_mlib.c

@@ -260,8 +260,6 @@ void MPV_common_init_mlib(MpegEncContext *s)
     if(s->avctx->idct_algo==FF_IDCT_AUTO || s->avctx->idct_algo==FF_IDCT_MLIB){
         s->idct_put= ff_idct_put_mlib;
         s->idct_add= ff_idct_add_mlib;
-        for(i=0; i<64; i++)
-            s->idct_permutation[i]= i;
+        s->idct_permutation_type= FF_NO_IDCT_PERM;
     }
-
 }

libavcodec/mpegvideo.c

@@ -69,6 +69,18 @@ static const unsigned short aanscales[64] = {
     4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
 };
 
+/* Input permutation for the simple_idct_mmx */
+static const UINT8 simple_mmx_permutation[64]={
+	0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D, 
+	0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D, 
+	0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D, 
+	0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F, 
+	0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F, 
+	0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D, 
+	0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F, 
+	0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
+};
+
 static UINT8 h263_chroma_roundtab[16] = {
     0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
 };
@@ -187,13 +199,11 @@ int DCT_common_init(MpegEncContext *s)
     if(s->avctx->idct_algo==FF_IDCT_INT){
         s->idct_put= ff_jref_idct_put;
         s->idct_add= ff_jref_idct_add;
-        for(i=0; i<64; i++)
-            s->idct_permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
+        s->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
     }else{ //accurate/default
         s->idct_put= simple_idct_put;
         s->idct_add= simple_idct_add;
-        for(i=0; i<64; i++)
-            s->idct_permutation[i]= i;
+        s->idct_permutation_type= FF_NO_IDCT_PERM;
     }
         
 #ifdef HAVE_MMX
@@ -212,6 +222,28 @@ int DCT_common_init(MpegEncContext *s)
     MPV_common_init_armv4l();
 #endif
 
+    switch(s->idct_permutation_type){
+    case FF_NO_IDCT_PERM:
+        for(i=0; i<64; i++)
+            s->idct_permutation[i]= i;
+        break;
+    case FF_LIBMPEG2_IDCT_PERM:
+        for(i=0; i<64; i++)
+            s->idct_permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
+        break;
+    case FF_SIMPLE_IDCT_PERM:
+        for(i=0; i<64; i++)
+            s->idct_permutation[i]= simple_mmx_permutation[i];
+        break;
+    case FF_TRANSPOSE_IDCT_PERM:
+        for(i=0; i<64; i++)
+            s->idct_permutation[i]= ((i&7)<<3) | (i>>3);
+        break;
+    default:
+        fprintf(stderr, "Internal error, IDCT permutation not set\n");
+        return -1;
+    }
+
 
     /* load & permutate scantables
        note: only wmv uses differnt ones 

libavcodec/mpegvideo.h

@@ -298,6 +298,11 @@ typedef struct MpegEncContext {
     ScanTable intra_v_scantable;
     ScanTable inter_scantable; // if inter == intra then intra should be used to reduce tha cache usage
     UINT8 idct_permutation[64];
+    int idct_permutation_type;
+#define FF_NO_IDCT_PERM 1
+#define FF_LIBMPEG2_IDCT_PERM 2
+#define FF_SIMPLE_IDCT_PERM 3
+#define FF_TRANSPOSE_IDCT_PERM 4
 
     void *opaque; /* private data for the user */
 

libavcodec/ps2/mpegvideo_mmi.c

@@ -85,14 +85,12 @@ static void dct_unquantize_h263_mmi(MpegEncContext *s,
 void MPV_common_init_mmi(MpegEncContext *s)
 {
     int i;
-//  const int dct_algo = s->avctx->dct_algo;
     const int idct_algo= s->avctx->idct_algo;
        
-    if(idct_algo==FF_IDCT_AUTO){
+    if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_PS2){
         s->idct_put= ff_mmi_idct_put;
         s->idct_add= ff_mmi_idct_add;
-        for(i=0; i<64; i++)
-            s->idct_permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
+        s->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
     }
     s->dct_unquantize_h263 = dct_unquantize_h263_mmi;
 }