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-rw-r--r--media/libvpx/vp8/common/entropy.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/entropy.c b/media/libvpx/vp8/common/entropy.c
new file mode 100644
index 000000000..c00e565f0
--- /dev/null
+++ b/media/libvpx/vp8/common/entropy.c
@@ -0,0 +1,188 @@
+/*
+ * 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 "entropy.h"
+#include "blockd.h"
+#include "onyxc_int.h"
+#include "vpx_mem/vpx_mem.h"
+
+#include "coefupdateprobs.h"
+
+DECLARE_ALIGNED(16, const unsigned char, vp8_norm[256]) =
+{
+ 0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+DECLARE_ALIGNED(16, const unsigned char, vp8_coef_bands[16]) =
+{ 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7};
+
+DECLARE_ALIGNED(16, const unsigned char,
+ vp8_prev_token_class[MAX_ENTROPY_TOKENS]) =
+{ 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0};
+
+DECLARE_ALIGNED(16, const int, vp8_default_zig_zag1d[16]) =
+{
+ 0, 1, 4, 8,
+ 5, 2, 3, 6,
+ 9, 12, 13, 10,
+ 7, 11, 14, 15,
+};
+
+DECLARE_ALIGNED(16, const short, vp8_default_inv_zig_zag[16]) =
+{
+ 1, 2, 6, 7,
+ 3, 5, 8, 13,
+ 4, 9, 12, 14,
+ 10, 11, 15, 16
+};
+
+/* vp8_default_zig_zag_mask generated with:
+
+ void vp8_init_scan_order_mask()
+ {
+ int i;
+
+ for (i = 0; i < 16; i++)
+ {
+ vp8_default_zig_zag_mask[vp8_default_zig_zag1d[i]] = 1 << i;
+ }
+
+ }
+*/
+DECLARE_ALIGNED(16, const short, vp8_default_zig_zag_mask[16]) =
+{
+ 1, 2, 32, 64,
+ 4, 16, 128, 4096,
+ 8, 256, 2048, 8192,
+ 512, 1024, 16384, -32768
+};
+
+const int vp8_mb_feature_data_bits[MB_LVL_MAX] = {7, 6};
+
+/* Array indices are identical to previously-existing CONTEXT_NODE indices */
+
+const vp8_tree_index vp8_coef_tree[ 22] = /* corresponding _CONTEXT_NODEs */
+{
+ -DCT_EOB_TOKEN, 2, /* 0 = EOB */
+ -ZERO_TOKEN, 4, /* 1 = ZERO */
+ -ONE_TOKEN, 6, /* 2 = ONE */
+ 8, 12, /* 3 = LOW_VAL */
+ -TWO_TOKEN, 10, /* 4 = TWO */
+ -THREE_TOKEN, -FOUR_TOKEN, /* 5 = THREE */
+ 14, 16, /* 6 = HIGH_LOW */
+ -DCT_VAL_CATEGORY1, -DCT_VAL_CATEGORY2, /* 7 = CAT_ONE */
+ 18, 20, /* 8 = CAT_THREEFOUR */
+ -DCT_VAL_CATEGORY3, -DCT_VAL_CATEGORY4, /* 9 = CAT_THREE */
+ -DCT_VAL_CATEGORY5, -DCT_VAL_CATEGORY6 /* 10 = CAT_FIVE */
+};
+
+/* vp8_coef_encodings generated with:
+ vp8_tokens_from_tree(vp8_coef_encodings, vp8_coef_tree);
+*/
+vp8_token vp8_coef_encodings[MAX_ENTROPY_TOKENS] =
+{
+ {2, 2},
+ {6, 3},
+ {28, 5},
+ {58, 6},
+ {59, 6},
+ {60, 6},
+ {61, 6},
+ {124, 7},
+ {125, 7},
+ {126, 7},
+ {127, 7},
+ {0, 1}
+};
+
+/* Trees for extra bits. Probabilities are constant and
+ do not depend on previously encoded bits */
+
+static const vp8_prob Pcat1[] = { 159};
+static const vp8_prob Pcat2[] = { 165, 145};
+static const vp8_prob Pcat3[] = { 173, 148, 140};
+static const vp8_prob Pcat4[] = { 176, 155, 140, 135};
+static const vp8_prob Pcat5[] = { 180, 157, 141, 134, 130};
+static const vp8_prob Pcat6[] =
+{ 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129};
+
+
+/* tree index tables generated with:
+
+ void init_bit_tree(vp8_tree_index *p, int n)
+ {
+ int i = 0;
+
+ while (++i < n)
+ {
+ p[0] = p[1] = i << 1;
+ p += 2;
+ }
+
+ p[0] = p[1] = 0;
+ }
+
+ void init_bit_trees()
+ {
+ init_bit_tree(cat1, 1);
+ init_bit_tree(cat2, 2);
+ init_bit_tree(cat3, 3);
+ init_bit_tree(cat4, 4);
+ init_bit_tree(cat5, 5);
+ init_bit_tree(cat6, 11);
+ }
+*/
+
+static const vp8_tree_index cat1[2] = { 0, 0 };
+static const vp8_tree_index cat2[4] = { 2, 2, 0, 0 };
+static const vp8_tree_index cat3[6] = { 2, 2, 4, 4, 0, 0 };
+static const vp8_tree_index cat4[8] = { 2, 2, 4, 4, 6, 6, 0, 0 };
+static const vp8_tree_index cat5[10] = { 2, 2, 4, 4, 6, 6, 8, 8, 0, 0 };
+static const vp8_tree_index cat6[22] = { 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12,
+ 14, 14, 16, 16, 18, 18, 20, 20, 0, 0 };
+
+const vp8_extra_bit_struct vp8_extra_bits[12] =
+{
+ { 0, 0, 0, 0},
+ { 0, 0, 0, 1},
+ { 0, 0, 0, 2},
+ { 0, 0, 0, 3},
+ { 0, 0, 0, 4},
+ { cat1, Pcat1, 1, 5},
+ { cat2, Pcat2, 2, 7},
+ { cat3, Pcat3, 3, 11},
+ { cat4, Pcat4, 4, 19},
+ { cat5, Pcat5, 5, 35},
+ { cat6, Pcat6, 11, 67},
+ { 0, 0, 0, 0}
+};
+
+#include "default_coef_probs.h"
+
+void vp8_default_coef_probs(VP8_COMMON *pc)
+{
+ memcpy(pc->fc.coef_probs, default_coef_probs, sizeof(default_coef_probs));
+}
+