libvpx: Add VP9 decoder.

source/libvpx/vp9/decoder/x86/vp9_idct_blk_mmx.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"
+#include "vp9/decoder/x86/vp9_idct_mmx.h"
+
+void vp9_dequant_dc_idct_add_y_block_mmx(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 (eobs[0] > 1)
+      vp9_dequant_dc_idct_add_mmx(q, dq, pre, dst, 16, stride, dc[0]);
+    else
+      vp9_dc_only_idct_add_mmx(dc[0], pre, dst, 16, stride);
+
+    if (eobs[1] > 1)
+      vp9_dequant_dc_idct_add_mmx(q + 16, dq, pre + 4,
+                                  dst + 4, 16, stride, dc[1]);
+    else
+      vp9_dc_only_idct_add_mmx(dc[1], pre + 4, dst + 4, 16, stride);
+
+    if (eobs[2] > 1)
+      vp9_dequant_dc_idct_add_mmx(q + 32, dq, pre + 8,
+                                  dst + 8, 16, stride, dc[2]);
+    else
+      vp9_dc_only_idct_add_mmx(dc[2], pre + 8, dst + 8, 16, stride);
+
+    if (eobs[3] > 1)
+      vp9_dequant_dc_idct_add_mmx(q + 48, dq, pre + 12,
+                                  dst + 12, 16, stride, dc[3]);
+    else
+      vp9_dc_only_idct_add_mmx(dc[3], pre + 12, dst + 12, 16, stride);
+
+    q    += 64;
+    dc   += 4;
+    pre  += 64;
+    dst  += 4 * stride;
+    eobs += 4;
+  }
+}
+
+void vp9_dequant_idct_add_y_block_mmx(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 (eobs[0] > 1)
+      vp9_dequant_idct_add_mmx(q, dq, pre, dst, 16, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[0]*dq[0], pre, dst, 16, stride);
+      ((int *)q)[0] = 0;
+    }
+
+    if (eobs[1] > 1)
+      vp9_dequant_idct_add_mmx(q + 16, dq, pre + 4, dst + 4, 16, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[16]*dq[0], pre + 4, dst + 4, 16, stride);
+      ((int *)(q + 16))[0] = 0;
+    }
+
+    if (eobs[2] > 1)
+      vp9_dequant_idct_add_mmx(q + 32, dq, pre + 8, dst + 8, 16, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[32]*dq[0], pre + 8, dst + 8, 16, stride);
+      ((int *)(q + 32))[0] = 0;
+    }
+
+    if (eobs[3] > 1)
+      vp9_dequant_idct_add_mmx(q + 48, dq, pre + 12, dst + 12, 16, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[48]*dq[0], pre + 12, dst + 12, 16, stride);
+      ((int *)(q + 48))[0] = 0;
+    }
+
+    q    += 64;
+    pre  += 64;
+    dst  += 4 * stride;
+    eobs += 4;
+  }
+}
+
+void vp9_dequant_idct_add_uv_block_mmx(short *q, const short *dq,
+                                       unsigned char *pre,
+                                       unsigned char *dstu,
+                                       unsigned char *dstv,
+                                       int stride, unsigned short *eobs) {
+  int i;
+
+  for (i = 0; i < 2; i++) {
+    if (eobs[0] > 1)
+      vp9_dequant_idct_add_mmx(q, dq, pre, dstu, 8, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[0]*dq[0], pre, dstu, 8, stride);
+      ((int *)q)[0] = 0;
+    }
+
+    if (eobs[1] > 1)
+      vp9_dequant_idct_add_mmx(q + 16, dq, pre + 4, dstu + 4, 8, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[16]*dq[0], pre + 4, dstu + 4, 8, stride);
+      ((int *)(q + 16))[0] = 0;
+    }
+
+    q    += 32;
+    pre  += 32;
+    dstu += 4 * stride;
+    eobs += 2;
+  }
+
+  for (i = 0; i < 2; i++) {
+    if (eobs[0] > 1)
+      vp9_dequant_idct_add_mmx(q, dq, pre, dstv, 8, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[0]*dq[0], pre, dstv, 8, stride);
+      ((int *)q)[0] = 0;
+    }
+
+    if (eobs[1] > 1)
+      vp9_dequant_idct_add_mmx(q + 16, dq, pre + 4, dstv + 4, 8, stride);
+    else {
+      vp9_dc_only_idct_add_mmx(q[16]*dq[0], pre + 4, dstv + 4, 8, stride);
+      ((int *)(q + 16))[0] = 0;
+    }
+
+    q    += 32;
+    pre  += 32;
+    dstv += 4 * stride;
+    eobs += 2;
+  }
+}