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-rw-r--r--libvpx/vp8/common/reconintra4x4.c297
1 files changed, 297 insertions, 0 deletions
diff --git a/libvpx/vp8/common/reconintra4x4.c b/libvpx/vp8/common/reconintra4x4.c
new file mode 100644
index 0000000..7bb8d0a
--- /dev/null
+++ b/libvpx/vp8/common/reconintra4x4.c
@@ -0,0 +1,297 @@
+/*
+ * 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_config.h"
+#include "vpx_rtcd.h"
+#include "blockd.h"
+
+void vp8_intra4x4_predict_c(unsigned char *Above,
+ unsigned char *yleft, int left_stride,
+ B_PREDICTION_MODE b_mode,
+ unsigned char *dst, int dst_stride,
+ unsigned char top_left)
+{
+ int i, r, c;
+
+ unsigned char Left[4];
+ Left[0] = yleft[0];
+ Left[1] = yleft[left_stride];
+ Left[2] = yleft[2 * left_stride];
+ Left[3] = yleft[3 * left_stride];
+
+ switch (b_mode)
+ {
+ case B_DC_PRED:
+ {
+ int expected_dc = 0;
+
+ for (i = 0; i < 4; i++)
+ {
+ expected_dc += Above[i];
+ expected_dc += Left[i];
+ }
+
+ expected_dc = (expected_dc + 4) >> 3;
+
+ for (r = 0; r < 4; r++)
+ {
+ for (c = 0; c < 4; c++)
+ {
+ dst[c] = expected_dc;
+ }
+
+ dst += dst_stride;
+ }
+ }
+ break;
+ case B_TM_PRED:
+ {
+ /* prediction similar to true_motion prediction */
+ for (r = 0; r < 4; r++)
+ {
+ for (c = 0; c < 4; c++)
+ {
+ int pred = Above[c] - top_left + Left[r];
+
+ if (pred < 0)
+ pred = 0;
+
+ if (pred > 255)
+ pred = 255;
+
+ dst[c] = pred;
+ }
+
+ dst += dst_stride;
+ }
+ }
+ break;
+
+ case B_VE_PRED:
+ {
+
+ unsigned int ap[4];
+ ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2;
+ ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2;
+ ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2;
+ ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2;
+
+ for (r = 0; r < 4; r++)
+ {
+ for (c = 0; c < 4; c++)
+ {
+
+ dst[c] = ap[c];
+ }
+
+ dst += dst_stride;
+ }
+
+ }
+ break;
+
+
+ case B_HE_PRED:
+ {
+
+ unsigned int lp[4];
+ lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2;
+ lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2;
+ lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2;
+ lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2;
+
+ for (r = 0; r < 4; r++)
+ {
+ for (c = 0; c < 4; c++)
+ {
+ dst[c] = lp[r];
+ }
+
+ dst += dst_stride;
+ }
+ }
+ break;
+ case B_LD_PRED:
+ {
+ unsigned char *ptr = Above;
+ dst[0 * dst_stride + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2;
+ dst[0 * dst_stride + 1] =
+ dst[1 * dst_stride + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2;
+ dst[0 * dst_stride + 2] =
+ dst[1 * dst_stride + 1] =
+ dst[2 * dst_stride + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2;
+ dst[0 * dst_stride + 3] =
+ dst[1 * dst_stride + 2] =
+ dst[2 * dst_stride + 1] =
+ dst[3 * dst_stride + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2;
+ dst[1 * dst_stride + 3] =
+ dst[2 * dst_stride + 2] =
+ dst[3 * dst_stride + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2;
+ dst[2 * dst_stride + 3] =
+ dst[3 * dst_stride + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2;
+ dst[3 * dst_stride + 3] = (ptr[6] + ptr[7] * 2 + ptr[7] + 2) >> 2;
+
+ }
+ break;
+ case B_RD_PRED:
+ {
+
+ unsigned char pp[9];
+
+ pp[0] = Left[3];
+ pp[1] = Left[2];
+ pp[2] = Left[1];
+ pp[3] = Left[0];
+ pp[4] = top_left;
+ pp[5] = Above[0];
+ pp[6] = Above[1];
+ pp[7] = Above[2];
+ pp[8] = Above[3];
+
+ dst[3 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
+ dst[3 * dst_stride + 1] =
+ dst[2 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
+ dst[3 * dst_stride + 2] =
+ dst[2 * dst_stride + 1] =
+ dst[1 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
+ dst[3 * dst_stride + 3] =
+ dst[2 * dst_stride + 2] =
+ dst[1 * dst_stride + 1] =
+ dst[0 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
+ dst[2 * dst_stride + 3] =
+ dst[1 * dst_stride + 2] =
+ dst[0 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
+ dst[1 * dst_stride + 3] =
+ dst[0 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
+ dst[0 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
+
+ }
+ break;
+ case B_VR_PRED:
+ {
+
+ unsigned char pp[9];
+
+ pp[0] = Left[3];
+ pp[1] = Left[2];
+ pp[2] = Left[1];
+ pp[3] = Left[0];
+ pp[4] = top_left;
+ pp[5] = Above[0];
+ pp[6] = Above[1];
+ pp[7] = Above[2];
+ pp[8] = Above[3];
+
+
+ dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
+ dst[2 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
+ dst[3 * dst_stride + 1] =
+ dst[1 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
+ dst[2 * dst_stride + 1] =
+ dst[0 * dst_stride + 0] = (pp[4] + pp[5] + 1) >> 1;
+ dst[3 * dst_stride + 2] =
+ dst[1 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
+ dst[2 * dst_stride + 2] =
+ dst[0 * dst_stride + 1] = (pp[5] + pp[6] + 1) >> 1;
+ dst[3 * dst_stride + 3] =
+ dst[1 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
+ dst[2 * dst_stride + 3] =
+ dst[0 * dst_stride + 2] = (pp[6] + pp[7] + 1) >> 1;
+ dst[1 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
+ dst[0 * dst_stride + 3] = (pp[7] + pp[8] + 1) >> 1;
+
+ }
+ break;
+ case B_VL_PRED:
+ {
+
+ unsigned char *pp = Above;
+
+ dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
+ dst[1 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
+ dst[2 * dst_stride + 0] =
+ dst[0 * dst_stride + 1] = (pp[1] + pp[2] + 1) >> 1;
+ dst[1 * dst_stride + 1] =
+ dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
+ dst[2 * dst_stride + 1] =
+ dst[0 * dst_stride + 2] = (pp[2] + pp[3] + 1) >> 1;
+ dst[3 * dst_stride + 1] =
+ dst[1 * dst_stride + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
+ dst[0 * dst_stride + 3] =
+ dst[2 * dst_stride + 2] = (pp[3] + pp[4] + 1) >> 1;
+ dst[1 * dst_stride + 3] =
+ dst[3 * dst_stride + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
+ dst[2 * dst_stride + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
+ dst[3 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
+ }
+ break;
+
+ case B_HD_PRED:
+ {
+ unsigned char pp[9];
+ pp[0] = Left[3];
+ pp[1] = Left[2];
+ pp[2] = Left[1];
+ pp[3] = Left[0];
+ pp[4] = top_left;
+ pp[5] = Above[0];
+ pp[6] = Above[1];
+ pp[7] = Above[2];
+ pp[8] = Above[3];
+
+
+ dst[3 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
+ dst[3 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
+ dst[2 * dst_stride + 0] =
+ dst[3 * dst_stride + 2] = (pp[1] + pp[2] + 1) >> 1;
+ dst[2 * dst_stride + 1] =
+ dst[3 * dst_stride + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
+ dst[2 * dst_stride + 2] =
+ dst[1 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
+ dst[2 * dst_stride + 3] =
+ dst[1 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
+ dst[1 * dst_stride + 2] =
+ dst[0 * dst_stride + 0] = (pp[3] + pp[4] + 1) >> 1;
+ dst[1 * dst_stride + 3] =
+ dst[0 * dst_stride + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
+ dst[0 * dst_stride + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
+ dst[0 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
+ }
+ break;
+
+
+ case B_HU_PRED:
+ {
+ unsigned char *pp = Left;
+ dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
+ dst[0 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
+ dst[0 * dst_stride + 2] =
+ dst[1 * dst_stride + 0] = (pp[1] + pp[2] + 1) >> 1;
+ dst[0 * dst_stride + 3] =
+ dst[1 * dst_stride + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
+ dst[1 * dst_stride + 2] =
+ dst[2 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
+ dst[1 * dst_stride + 3] =
+ dst[2 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2;
+ dst[2 * dst_stride + 2] =
+ dst[2 * dst_stride + 3] =
+ dst[3 * dst_stride + 0] =
+ dst[3 * dst_stride + 1] =
+ dst[3 * dst_stride + 2] =
+ dst[3 * dst_stride + 3] = pp[3];
+ }
+ break;
+
+ default:
+ break;
+
+ }
+}
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