libvpx: Add VP9 decoder.

source/libvpx/vp9/common/x86/vp9_filter_sse4.c

Index: source/libvpx/vp9/common/x86/vp9_filter_sse4.c
===================================================================
--- source/libvpx/vp9/common/x86/vp9_filter_sse4.c	(revision 0)
+++ source/libvpx/vp9/common/x86/vp9_filter_sse4.c	(revision 0)
@@ -0,0 +1,362 @@
+/*
+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h> // for alignment checks
+#include <smmintrin.h> // SSE4.1
+#include "vp9/common/vp9_filter.h"
+#include "vpx_ports/mem.h" // for DECLARE_ALIGNED
+#include "vp9_rtcd.h"
+
+// TODO(cd): After cleanup, commit faster versions for non 4x4 size. This is
+//           just a quick partial snapshot so that other can already use some
+//           speedup.
+// TODO(cd): Use vectorized 8 tap filtering code as speedup to pure C 6 tap
+//           filtering.
+// TODO(cd): Reduce source size by using macros instead of current code
+//           duplication.
+// TODO(cd): Add some comments, better variable naming.
+// TODO(cd): Maybe use _mm_maddubs_epi16 if smaller filter coeficients (no sum
+//           of positive above 128), or have higher precision filter
+//           coefficients.
+
+DECLARE_ALIGNED(16, static const unsigned char, mask0123_c[16]) = {
+  0x00, 0x01,
+  0x01, 0x02,
+  0x02, 0x03,
+  0x03, 0x04,
+  0x02, 0x03,
+  0x03, 0x04,
+  0x04, 0x05,
+  0x05, 0x06,
+};
+DECLARE_ALIGNED(16, static const unsigned char, mask4567_c[16]) = {
+  0x04, 0x05,
+  0x05, 0x06,
+  0x06, 0x07,
+  0x07, 0x08,
+  0x06, 0x07,
+  0x07, 0x08,
+  0x08, 0x09,
+  0x09, 0x0A,
+};
+DECLARE_ALIGNED(16, static const unsigned int, rounding_c[4]) = {
+  VP9_FILTER_WEIGHT >> 1,
+  VP9_FILTER_WEIGHT >> 1,
+  VP9_FILTER_WEIGHT >> 1,
+  VP9_FILTER_WEIGHT >> 1,
+};
+DECLARE_ALIGNED(16, static const unsigned char, transpose_c[16]) = {
+  0, 4,  8, 12,
+  1, 5,  9, 13,
+  2, 6, 10, 14,
+  3, 7, 11, 15
+};
+
+// Creating a macro to do more than four pixels at once to hide instruction
+// latency is actually slower :-(
+#define DO_FOUR_PIXELS(result, offset)                                         \
+  {                                                                            \
+  /*load pixels*/                                                              \
+  __m128i src  = _mm_loadu_si128((const __m128i *)(src_ptr + offset));         \
+  /* extract the ones used for first column */                                 \
+  __m128i src0123 = _mm_shuffle_epi8(src, mask0123);                           \
+  __m128i src4567 = _mm_shuffle_epi8(src, mask4567);                           \
+  __m128i src01_16 = _mm_unpacklo_epi8(src0123, zero);                         \
+  __m128i src23_16 = _mm_unpackhi_epi8(src0123, zero);                         \
+  __m128i src45_16 = _mm_unpacklo_epi8(src4567, zero);                         \
+  __m128i src67_16 = _mm_unpackhi_epi8(src4567, zero);                         \
+  /* multiply accumulate them */                                               \
+  __m128i mad01 = _mm_madd_epi16(src01_16, fil01);                             \
+  __m128i mad23 = _mm_madd_epi16(src23_16, fil23);                             \
+  __m128i mad45 = _mm_madd_epi16(src45_16, fil45);                             \
+  __m128i mad67 = _mm_madd_epi16(src67_16, fil67);                             \
+  __m128i mad0123 = _mm_add_epi32(mad01, mad23);                               \
+  __m128i mad4567 = _mm_add_epi32(mad45, mad67);                               \
+  __m128i mad_all = _mm_add_epi32(mad0123, mad4567);                           \
+  mad_all = _mm_add_epi32(mad_all, rounding);                                  \
+  result = _mm_srai_epi32(mad_all, VP9_FILTER_SHIFT);                          \
+  }
+
+void vp9_filter_block2d_4x4_8_sse4_1
+(
+ const unsigned char *src_ptr, const unsigned int src_stride,
+ const short *HFilter_aligned16, const short *VFilter_aligned16,
+ unsigned char *dst_ptr, unsigned int dst_stride
+) {
+  __m128i intermediateA, intermediateB, intermediateC;
+
+  const int kInterp_Extend = 4;
+
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i mask0123 = _mm_load_si128((const __m128i *)mask0123_c);
+  const __m128i mask4567 = _mm_load_si128((const __m128i *)mask4567_c);
+  const __m128i rounding = _mm_load_si128((const __m128i *)rounding_c);
+  const __m128i transpose = _mm_load_si128((const __m128i *)transpose_c);
+
+  // check alignment
+  assert(0 == ((long)HFilter_aligned16)%16);
+  assert(0 == ((long)VFilter_aligned16)%16);
+
+  {
+    __m128i transpose3_0;
+    __m128i transpose3_1;
+    __m128i transpose3_2;
+    __m128i transpose3_3;
+
+    // Horizontal pass (src -> intermediate).
+    {
+      const __m128i HFilter = _mm_load_si128((const __m128i *)HFilter_aligned16);
+      // get first two columns filter coefficients
+      __m128i fil01 = _mm_shuffle_epi32(HFilter, _MM_SHUFFLE(0, 0, 0, 0));
+      __m128i fil23 = _mm_shuffle_epi32(HFilter, _MM_SHUFFLE(1, 1, 1, 1));
+      __m128i fil45 = _mm_shuffle_epi32(HFilter, _MM_SHUFFLE(2, 2, 2, 2));
+      __m128i fil67 = _mm_shuffle_epi32(HFilter, _MM_SHUFFLE(3, 3, 3, 3));
+      src_ptr -= (kInterp_Extend - 1) * src_stride + (kInterp_Extend - 1);
+
+      {
+        __m128i mad_all0;
+        __m128i mad_all1;
+        __m128i mad_all2;
+        __m128i mad_all3;
+        DO_FOUR_PIXELS(mad_all0, 0*src_stride)
+        DO_FOUR_PIXELS(mad_all1, 1*src_stride)
+        DO_FOUR_PIXELS(mad_all2, 2*src_stride)
+        DO_FOUR_PIXELS(mad_all3, 3*src_stride)
+        mad_all0 = _mm_packs_epi32(mad_all0, mad_all1);
+        mad_all2 = _mm_packs_epi32(mad_all2, mad_all3);
+        intermediateA = _mm_packus_epi16(mad_all0, mad_all2);
+        // --
+        src_ptr += src_stride*4;
+        // --
+        DO_FOUR_PIXELS(mad_all0, 0*src_stride)
+        DO_FOUR_PIXELS(mad_all1, 1*src_stride)
+        DO_FOUR_PIXELS(mad_all2, 2*src_stride)
+        DO_FOUR_PIXELS(mad_all3, 3*src_stride)
+        mad_all0 = _mm_packs_epi32(mad_all0, mad_all1);
+        mad_all2 = _mm_packs_epi32(mad_all2, mad_all3);
+        intermediateB = _mm_packus_epi16(mad_all0, mad_all2);
+        // --
+        src_ptr += src_stride*4;
+        // --
+        DO_FOUR_PIXELS(mad_all0, 0*src_stride)
+        DO_FOUR_PIXELS(mad_all1, 1*src_stride)
+        DO_FOUR_PIXELS(mad_all2, 2*src_stride)
+        mad_all0 = _mm_packs_epi32(mad_all0, mad_all1);
+        mad_all2 = _mm_packs_epi32(mad_all2, mad_all2);
+        intermediateC = _mm_packus_epi16(mad_all0, mad_all2);
+      }
+    }
+
+    // Transpose result (intermediate -> transpose3_x)
+    {
+      // 00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33
+      // 40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73
+      // 80 81 82 83 90 91 92 93 A0 A1 A2 A3 xx xx xx xx
+      const __m128i transpose1_0 = _mm_shuffle_epi8(intermediateA, transpose);
+      const __m128i transpose1_1 = _mm_shuffle_epi8(intermediateB, transpose);
+      const __m128i transpose1_2 = _mm_shuffle_epi8(intermediateC, transpose);
+      // 00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33
+      // 40 50 60 70 41 51 61 71 42 52 62 72 43 53 63 73
+      // 80 90 A0 xx 81 91 A1 xx 82 92 A2 xx 83 93 A3 xx
+      const __m128i transpose2_0 = _mm_unpacklo_epi32(transpose1_0, transpose1_1);
+      const __m128i transpose2_1 = _mm_unpackhi_epi32(transpose1_0, transpose1_1);
+      // 00 10 20 30 40 50 60 70 01 11 21 31 41 51 61 71
+      // 02 12 22 32 42 52 62 72 03 13 23 33 43 53 63 73
+      transpose3_0 = _mm_castps_si128(
+                            _mm_shuffle_ps(_mm_castsi128_ps(transpose2_0),
+                                           _mm_castsi128_ps(transpose1_2),
+                                           _MM_SHUFFLE(0, 0, 1, 0)));
+      transpose3_1 = _mm_castps_si128(
+                            _mm_shuffle_ps(_mm_castsi128_ps(transpose2_0),
+                                           _mm_castsi128_ps(transpose1_2),
+                                           _MM_SHUFFLE(1, 1, 3, 2)));
+      transpose3_2 = _mm_castps_si128(
+                            _mm_shuffle_ps(_mm_castsi128_ps(transpose2_1),
+                                           _mm_castsi128_ps(transpose1_2),
+                                           _MM_SHUFFLE(2, 2, 1, 0)));
+      transpose3_3 = _mm_castps_si128(
+                            _mm_shuffle_ps(_mm_castsi128_ps(transpose2_1),
+                                           _mm_castsi128_ps(transpose1_2),
+                                           _MM_SHUFFLE(3, 3, 3, 2)));
+      // 00 10 20 30 40 50 60 70 80 90 A0 xx xx xx xx xx
+      // 01 11 21 31 41 51 61 71 81 91 A1 xx xx xx xx xx
+      // 02 12 22 32 42 52 62 72 82 92 A2 xx xx xx xx xx
+      // 03 13 23 33 43 53 63 73 83 93 A3 xx xx xx xx xx
+    }
+
+    // Vertical pass (transpose3_x -> dst).
+    {
+      const __m128i VFilter = _mm_load_si128((const __m128i *)VFilter_aligned16);
+      // get first two columns filter coefficients
+      __m128i fil01 = _mm_shuffle_epi32(VFilter, _MM_SHUFFLE(0, 0, 0, 0));
+      __m128i fil23 = _mm_shuffle_epi32(VFilter, _MM_SHUFFLE(1, 1, 1, 1));
+      __m128i fil45 = _mm_shuffle_epi32(VFilter, _MM_SHUFFLE(2, 2, 2, 2));
+      __m128i fil67 = _mm_shuffle_epi32(VFilter, _MM_SHUFFLE(3, 3, 3, 3));
+      __m128i col0, col1, col2, col3;
+      {
+        //load pixels
+        __m128i src  = transpose3_0;
+        // extract the ones used for first column
+        __m128i src0123 = _mm_shuffle_epi8(src, mask0123);
+        __m128i src4567 = _mm_shuffle_epi8(src, mask4567);
+        __m128i src01_16 = _mm_unpacklo_epi8(src0123, zero);
+        __m128i src23_16 = _mm_unpackhi_epi8(src0123, zero);
+        __m128i src45_16 = _mm_unpacklo_epi8(src4567, zero);
+        __m128i src67_16 = _mm_unpackhi_epi8(src4567, zero);
+        // multiply accumulate them
+        __m128i mad01 = _mm_madd_epi16(src01_16, fil01);
+        __m128i mad23 = _mm_madd_epi16(src23_16, fil23);
+        __m128i mad45 = _mm_madd_epi16(src45_16, fil45);
+        __m128i mad67 = _mm_madd_epi16(src67_16, fil67);
+        __m128i mad0123 = _mm_add_epi32(mad01, mad23);
+        __m128i mad4567 = _mm_add_epi32(mad45, mad67);
+        __m128i mad_all = _mm_add_epi32(mad0123, mad4567);
+        mad_all = _mm_add_epi32(mad_all, rounding);
+        mad_all = _mm_srai_epi32(mad_all, VP9_FILTER_SHIFT);
+        mad_all = _mm_packs_epi32(mad_all, mad_all);
+        col0 = _mm_packus_epi16(mad_all, mad_all);
+      }
+      {
+        //load pixels
+        __m128i src  = transpose3_1;
+        // extract the ones used for first column
+        __m128i src0123 = _mm_shuffle_epi8(src, mask0123);
+        __m128i src4567 = _mm_shuffle_epi8(src, mask4567);
+        __m128i src01_16 = _mm_unpacklo_epi8(src0123, zero);
+        __m128i src23_16 = _mm_unpackhi_epi8(src0123, zero);
+        __m128i src45_16 = _mm_unpacklo_epi8(src4567, zero);
+        __m128i src67_16 = _mm_unpackhi_epi8(src4567, zero);
+        // multiply accumulate them
+        __m128i mad01 = _mm_madd_epi16(src01_16, fil01);
+        __m128i mad23 = _mm_madd_epi16(src23_16, fil23);
+        __m128i mad45 = _mm_madd_epi16(src45_16, fil45);
+        __m128i mad67 = _mm_madd_epi16(src67_16, fil67);
+        __m128i mad0123 = _mm_add_epi32(mad01, mad23);
+        __m128i mad4567 = _mm_add_epi32(mad45, mad67);
+        __m128i mad_all = _mm_add_epi32(mad0123, mad4567);
+        mad_all = _mm_add_epi32(mad_all, rounding);
+        mad_all = _mm_srai_epi32(mad_all, VP9_FILTER_SHIFT);
+        mad_all = _mm_packs_epi32(mad_all, mad_all);
+        col1 = _mm_packus_epi16(mad_all, mad_all);
+      }
+      {
+        //load pixels
+        __m128i src  = transpose3_2;
+        // extract the ones used for first column
+        __m128i src0123 = _mm_shuffle_epi8(src, mask0123);
+        __m128i src4567 = _mm_shuffle_epi8(src, mask4567);
+        __m128i src01_16 = _mm_unpacklo_epi8(src0123, zero);
+        __m128i src23_16 = _mm_unpackhi_epi8(src0123, zero);
+        __m128i src45_16 = _mm_unpacklo_epi8(src4567, zero);
+        __m128i src67_16 = _mm_unpackhi_epi8(src4567, zero);
+        // multiply accumulate them
+        __m128i mad01 = _mm_madd_epi16(src01_16, fil01);
+        __m128i mad23 = _mm_madd_epi16(src23_16, fil23);
+        __m128i mad45 = _mm_madd_epi16(src45_16, fil45);
+        __m128i mad67 = _mm_madd_epi16(src67_16, fil67);
+        __m128i mad0123 = _mm_add_epi32(mad01, mad23);
+        __m128i mad4567 = _mm_add_epi32(mad45, mad67);
+        __m128i mad_all = _mm_add_epi32(mad0123, mad4567);
+        mad_all = _mm_add_epi32(mad_all, rounding);
+        mad_all = _mm_srai_epi32(mad_all, VP9_FILTER_SHIFT);
+        mad_all = _mm_packs_epi32(mad_all, mad_all);
+        col2 = _mm_packus_epi16(mad_all, mad_all);
+      }
+      {
+        //load pixels
+        __m128i src  = transpose3_3;
+        // extract the ones used for first column
+        __m128i src0123 = _mm_shuffle_epi8(src, mask0123);
+        __m128i src4567 = _mm_shuffle_epi8(src, mask4567);
+        __m128i src01_16 = _mm_unpacklo_epi8(src0123, zero);
+        __m128i src23_16 = _mm_unpackhi_epi8(src0123, zero);
+        __m128i src45_16 = _mm_unpacklo_epi8(src4567, zero);
+        __m128i src67_16 = _mm_unpackhi_epi8(src4567, zero);
+        // multiply accumulate them
+        __m128i mad01 = _mm_madd_epi16(src01_16, fil01);
+        __m128i mad23 = _mm_madd_epi16(src23_16, fil23);
+        __m128i mad45 = _mm_madd_epi16(src45_16, fil45);
+        __m128i mad67 = _mm_madd_epi16(src67_16, fil67);
+        __m128i mad0123 = _mm_add_epi32(mad01, mad23);
+        __m128i mad4567 = _mm_add_epi32(mad45, mad67);
+        __m128i mad_all = _mm_add_epi32(mad0123, mad4567);
+        mad_all = _mm_add_epi32(mad_all, rounding);
+        mad_all = _mm_srai_epi32(mad_all, VP9_FILTER_SHIFT);
+        mad_all = _mm_packs_epi32(mad_all, mad_all);
+        col3 = _mm_packus_epi16(mad_all, mad_all);
+      }
+      {
+        __m128i col01 = _mm_unpacklo_epi8(col0, col1);
+        __m128i col23 = _mm_unpacklo_epi8(col2, col3);
+        __m128i col0123 = _mm_unpacklo_epi16(col01, col23);
+        //TODO(cd): look into Ronald's comment:
+        //    Future suggestion: I believe here, too, you can merge the
+        //    packs_epi32() and pacus_epi16() for the 4 cols above, so that
+        //    you get the data in a single register, and then use pshufb
+        //    (shuffle_epi8()) instead of the unpacks here. Should be
+        //    2+3+2 instructions faster.
+        *((unsigned int *)&dst_ptr[dst_stride * 0]) =
+            _mm_extract_epi32(col0123, 0);
+        *((unsigned int *)&dst_ptr[dst_stride * 1]) =
+            _mm_extract_epi32(col0123, 1);
+        *((unsigned int *)&dst_ptr[dst_stride * 2]) =
+            _mm_extract_epi32(col0123, 2);
+        *((unsigned int *)&dst_ptr[dst_stride * 3]) =
+            _mm_extract_epi32(col0123, 3);
+      }
+    }
+  }
+}
+
+void vp9_filter_block2d_8x4_8_sse4_1
+(
+ const unsigned char *src_ptr, const unsigned int src_stride,
+ const short *HFilter_aligned16, const short *VFilter_aligned16,
+ unsigned char *dst_ptr, unsigned int dst_stride
+) {
+  int j;
+  for (j=0; j<8; j+=4) {
+    vp9_filter_block2d_4x4_8_sse4_1(src_ptr + j, src_stride,
+                                    HFilter_aligned16, VFilter_aligned16,
+                                    dst_ptr + j, dst_stride);
+  }
+}
+
+void vp9_filter_block2d_8x8_8_sse4_1
+(
+ const unsigned char *src_ptr, const unsigned int src_stride,
+ const short *HFilter_aligned16, const short *VFilter_aligned16,
+ unsigned char *dst_ptr, unsigned int dst_stride
+) {
+  int i, j;
+  for (i=0; i<8; i+=4) {
+    for (j=0; j<8; j+=4) {
+      vp9_filter_block2d_4x4_8_sse4_1(src_ptr + j + i*src_stride, src_stride,
+                                      HFilter_aligned16, VFilter_aligned16,
+                                      dst_ptr + j + i*dst_stride, dst_stride);
+    }
+  }
+}
+
+void vp9_filter_block2d_16x16_8_sse4_1
+(
+ const unsigned char *src_ptr, const unsigned int src_stride,
+ const short *HFilter_aligned16, const short *VFilter_aligned16,
+ unsigned char *dst_ptr, unsigned int dst_stride
+) {
+  int i, j;
+  for (i=0; i<16; i+=4) {
+    for (j=0; j<16; j+=4) {
+      vp9_filter_block2d_4x4_8_sse4_1(src_ptr + j + i*src_stride, src_stride,
+                                      HFilter_aligned16, VFilter_aligned16,
+                                      dst_ptr + j + i*dst_stride, dst_stride);
+    }
+  }
+}
Property changes on: source/libvpx/vp9/common/x86/vp9_filter_sse4.c
___________________________________________________________________
Added: svn:eol-style
   + LF