libvpx: Add VP9 decoder.

source/libvpx/vp9/decoder/x86/vp9_idct_blk_sse2.c

+/*
+ *  Copyright (c) 2010 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 "vpx_ports/config.h"
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/decoder/vp9_dequantize.h"
+
+void vp9_idct_dequant_dc_0_2x_sse2(short *q, const short *dq,
+                                   unsigned char *pre, unsigned char *dst,
+                                   int dst_stride, const short *dc);
+
+void vp9_idct_dequant_dc_full_2x_sse2(short *q, const short *dq,
+                                      unsigned char *pre, unsigned char *dst,
+                                      int dst_stride, const short *dc);
+
+void vp9_idct_dequant_0_2x_sse2(short *q, const short *dq,
+                                unsigned char *pre, unsigned char *dst,
+                                int dst_stride, int blk_stride);
+
+void vp9_idct_dequant_full_2x_sse2(short *q, const short *dq,
+                                   unsigned char *pre, unsigned char *dst,
+                                   int dst_stride, int blk_stride);
+
+void vp9_dequant_dc_idct_add_y_block_sse2(short *q, const short *dq,
+                                          unsigned char *pre,
+                                          unsigned char *dst,
+                                          int stride, unsigned short *eobs,
+                                          const short *dc) {
+  int i;
+
+  for (i = 0; i < 4; i++) {
+    if (((short *)(eobs))[0] & 0xfefe)
+      vp9_idct_dequant_dc_full_2x_sse2(q, dq, pre, dst, stride, dc);
+    else
+      vp9_idct_dequant_dc_0_2x_sse2(q, dq, pre, dst, stride, dc);
+
+    if (((short *)(eobs))[1] & 0xfefe)
+      vp9_idct_dequant_dc_full_2x_sse2(q + 32, dq, pre + 8, dst + 8,
+                                       stride, dc + 2);
+    else
+      vp9_idct_dequant_dc_0_2x_sse2(q + 32, dq, pre + 8, dst + 8,
+                                    stride, dc + 2);
+
+    q    += 64;
+    dc   += 4;
+    pre  += 64;
+    dst  += stride * 4;
+    eobs += 4;
+  }
+}
+
+void vp9_dequant_idct_add_y_block_sse2(short *q, const short *dq,
+                                       unsigned char *pre, unsigned char *dst,
+                                       int stride, unsigned short *eobs) {
+  int i;
+
+  for (i = 0; i < 4; i++) {
+    if (((short *)(eobs))[0] & 0xfefe)
+      vp9_idct_dequant_full_2x_sse2(q, dq, pre, dst, stride, 16);
+    else
+      vp9_idct_dequant_0_2x_sse2(q, dq, pre, dst, stride, 16);
+
+    if (((short *)(eobs))[1] & 0xfefe)
+      vp9_idct_dequant_full_2x_sse2(q + 32, dq, pre + 8, dst + 8, stride, 16);
+    else
+      vp9_idct_dequant_0_2x_sse2(q + 32, dq, pre + 8, dst + 8, stride, 16);
+
+    q    += 64;
+    pre  += 64;
+    dst  += stride * 4;
+    eobs += 4;
+  }
+}
+
+void vp9_dequant_idct_add_uv_block_sse2(short *q, const short *dq,
+                                        unsigned char *pre,
+                                        unsigned char *dstu,
+                                        unsigned char *dstv,
+                                        int stride, unsigned short *eobs) {
+  if (((short *)(eobs))[0] & 0xfefe)
+    vp9_idct_dequant_full_2x_sse2(q, dq, pre, dstu, stride, 8);
+  else
+    vp9_idct_dequant_0_2x_sse2(q, dq, pre, dstu, stride, 8);
+
+  q    += 32;
+  pre  += 32;
+  dstu += stride * 4;
+
+  if (((short *)(eobs))[1] & 0xfefe)
+    vp9_idct_dequant_full_2x_sse2(q, dq, pre, dstu, stride, 8);
+  else
+    vp9_idct_dequant_0_2x_sse2(q, dq, pre, dstu, stride, 8);
+
+  q    += 32;
+  pre  += 32;
+
+  if (((short *)(eobs))[2] & 0xfefe)
+    vp9_idct_dequant_full_2x_sse2(q, dq, pre, dstv, stride, 8);
+  else
+    vp9_idct_dequant_0_2x_sse2(q, dq, pre, dstv, stride, 8);
+
+  q    += 32;
+  pre  += 32;
+  dstv += stride * 4;
+
+  if (((short *)(eobs))[3] & 0xfefe)
+    vp9_idct_dequant_full_2x_sse2(q, dq, pre, dstv, stride, 8);
+  else
+    vp9_idct_dequant_0_2x_sse2(q, dq, pre, dstv, stride, 8);
+}