(commit by michael)

mmx & mmx2 quantizer
c dct permutation bugfix
dont copy input on intra only encodings if it can be avoided
dont draw edges on intra only stuff

Originally committed as revision 281 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 201 insertions, 0 deletions

diff --git a/libavcodec/i386/mpegvideo_mmx_template.c b/libavcodec/i386/mpegvideo_mmx_template.c
new file mode 100644
index 0000000000..71df06504a
--- /dev/null
+++ b/libavcodec/i386/mpegvideo_mmx_template.c
@@ -0,0 +1,201 @@
+/*
+    Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#undef SPREADW
+#undef PMAXW
+#ifdef HAVE_MMX2
+#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"
+#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"
+
+#else
+#define SPREADW(a) \
+	"punpcklwd " #a ", " #a " \n\t"\
+	"punpcklwd " #a ", " #a " \n\t"
+#define PMAXW(a,b) \
+	"psubusw " #a ", " #b " \n\t"\
+	"paddw " #a ", " #b " \n\t"
+#endif
+
+static int RENAME(dct_quantize)(MpegEncContext *s,
+                            DCTELEM *block, int n,
+                            int qscale)
+{
+    int i, level, last_non_zero_p1, q;
+    const UINT16 *qmat;
+    static __align8 INT16 temp_block[64];
+    int minLevel, maxLevel;
+    
+    if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){
+	/* mpeg4 */
+        minLevel= -2048;
+	maxLevel= 2047;
+    }else if(s->out_format==FMT_MPEG1){
+	/* mpeg1 */
+        minLevel= -255;
+	maxLevel= 255;
+    }else{
+	/* h263 / msmpeg4 */
+        minLevel= -128;
+	maxLevel= 127;
+    }
+
+    av_fdct (block);
+    
+    if (s->mb_intra) {
+        int dummy;
+        if (n < 4)
+            q = s->y_dc_scale;
+        else
+            q = s->c_dc_scale;
+        
+        /* note: block[0] is assumed to be positive */
+#if 1
+	asm volatile (
+		"xorl %%edx, %%edx	\n\t"
+		"mul %%ebx		\n\t"
+		: "=d" (temp_block[0]), "=a"(dummy)
+		: "a" (block[0] + (q >> 1)), "b" (inverse[q])
+	);
+#else
+	asm volatile (
+		"xorl %%edx, %%edx	\n\t"
+		"divw %%bx		\n\t"
+		"movzwl %%ax, %%eax	\n\t"
+		: "=a" (temp_block[0])
+		: "a" (block[0] + (q >> 1)), "b" (q)
+		: "%edx"
+	);
+#endif
+//        temp_block[0] = (block[0] + (q >> 1)) / q;
+        i = 1;
+        last_non_zero_p1 = 1;
+        if (s->out_format == FMT_H263) {
+            qmat = s->q_non_intra_matrix16;
+        } else {
+            qmat = s->q_intra_matrix16;
+        }
+        for(i=1;i<4;i++) {
+            level = block[i] * qmat[i];
+            level = level / (1 << (QMAT_SHIFT_MMX - 3));
+            /* XXX: currently, this code is not optimal. the range should be:
+               mpeg1: -255..255
+               mpeg2: -2048..2047
+               h263:  -128..127
+               mpeg4: -2048..2047
+            */
+            if (level > maxLevel)
+                level = maxLevel;
+            else if (level < minLevel)
+                level = minLevel;
+            temp_block[i] = level;
+
+	    if(level) 
+	        if(last_non_zero_p1 < inv_zigzag_direct16[i]) last_non_zero_p1= inv_zigzag_direct16[i];
+	    block[i]=0;
+        }
+    } else {
+        i = 0;
+        last_non_zero_p1 = 0;
+        qmat = s->q_non_intra_matrix16;
+    }
+
+    asm volatile( /* XXX: small rounding bug, but it shouldnt matter */
+	"movd %3, %%mm3			\n\t"
+	SPREADW(%%mm3)
+	"movd %4, %%mm4			\n\t"
+	SPREADW(%%mm4)
+	"movd %5, %%mm5			\n\t"
+	SPREADW(%%mm5)
+	"pxor %%mm7, %%mm7		\n\t"
+	"movd %%eax, %%mm2		\n\t"
+	SPREADW(%%mm2)
+	"movl %6, %%eax			\n\t"
+	".balign 16			\n\t"
+	"1:				\n\t"
+	"movq (%1, %%eax), %%mm0	\n\t"
+	"movq (%2, %%eax), %%mm1	\n\t"
+	"movq %%mm0, %%mm6		\n\t"
+	"psraw $15, %%mm6		\n\t"
+	"pmulhw %%mm0, %%mm1		\n\t"
+	"psubsw %%mm6, %%mm1		\n\t"
+#ifdef HAVE_MMX2
+	"pminsw %%mm3, %%mm1		\n\t"
+	"pmaxsw %%mm4, %%mm1		\n\t"
+#else
+	"paddsw %%mm3, %%mm1		\n\t"
+	"psubusw %%mm4, %%mm1		\n\t"
+	"paddsw %%mm5, %%mm1		\n\t"
+#endif
+	"movq %%mm1, (%8, %%eax)	\n\t"
+	"pcmpeqw %%mm7, %%mm1		\n\t"
+	"movq (%7, %%eax), %%mm0	\n\t"
+	"movq %%mm7, (%1, %%eax)	\n\t"
+	"pandn %%mm0, %%mm1		\n\t"
+	PMAXW(%%mm1, %%mm2)
+	"addl $8, %%eax			\n\t"
+	" js 1b				\n\t"
+	"movq %%mm2, %%mm0		\n\t"
+	"psrlq $32, %%mm2		\n\t"
+	PMAXW(%%mm0, %%mm2)
+	"movq %%mm2, %%mm0		\n\t"
+	"psrlq $16, %%mm2		\n\t"
+	PMAXW(%%mm0, %%mm2)
+	"movd %%mm2, %%eax		\n\t"
+	"movzbl %%al, %%eax		\n\t"
+	: "+a" (last_non_zero_p1)
+	: "r" (block+64), "r" (qmat+64), 
+#ifdef HAVE_MMX2
+	  "m" (maxLevel),          "m" (minLevel),                    "m" (0 /* dummy */), "g" (2*i - 128),
+#else
+	  "m" (0x7FFF - maxLevel), "m" (0x7FFF -maxLevel + minLevel), "m" (minLevel),      "g" (2*i - 128),
+#endif
+	  "r" (inv_zigzag_direct16+64), "r" (temp_block+64)
+    );
+// last_non_zero_p1=64;       
+    /* permute for IDCT */
+    asm volatile(
+	"movl %0, %%eax			\n\t"
+	"pushl %%ebp			\n\t"
+	"movl %%esp, " MANGLE(esp_temp) "\n\t"
+	"1:				\n\t"
+	"movzbl (%1, %%eax), %%ebx	\n\t"
+	"movzbl 1(%1, %%eax), %%ebp	\n\t"
+	"movw (%2, %%ebx, 2), %%cx	\n\t"
+	"movw (%2, %%ebp, 2), %%sp	\n\t"
+	"movzbl " MANGLE(permutation) "(%%ebx), %%ebx\n\t"
+	"movzbl " MANGLE(permutation) "(%%ebp), %%ebp\n\t"
+	"movw %%cx, (%3, %%ebx, 2)	\n\t"
+	"movw %%sp, (%3, %%ebp, 2)	\n\t"
+	"addl $2, %%eax			\n\t"
+	" js 1b				\n\t"
+	"movl " MANGLE(esp_temp) ", %%esp\n\t"
+	"popl %%ebp			\n\t"
+	: 
+	: "g" (-last_non_zero_p1), "d" (zigzag_direct_noperm+last_non_zero_p1), "S" (temp_block), "D" (block)
+	: "%eax", "%ebx", "%ecx"
+	);
+/*
+    for(i=0; i<last_non_zero_p1; i++)
+    {
+       int j= zigzag_direct_noperm[i];
+       block[block_permute_op(j)]= temp_block[j];
+    }
+*/
+//block_permute(block);
+    return last_non_zero_p1 - 1;
+}