Merge pull request #850 from trav90/add-av1-support

Add initial support for AV1 video.

1 files changed, 181 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/entropy.h b/third_party/aom/av1/common/entropy.h
new file mode 100644
index 000000000..991692c2f
--- /dev/null
+++ b/third_party/aom/av1/common/entropy.h
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AV1_COMMON_ENTROPY_H_
+#define AOM_AV1_COMMON_ENTROPY_H_
+
+#include "config/aom_config.h"
+
+#include "aom/aom_integer.h"
+#include "aom_dsp/prob.h"
+
+#include "av1/common/common.h"
+#include "av1/common/common_data.h"
+#include "av1/common/enums.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define TOKEN_CDF_Q_CTXS 4
+
+#define TXB_SKIP_CONTEXTS 13
+
+#define EOB_COEF_CONTEXTS 9
+
+#define SIG_COEF_CONTEXTS_2D 26
+#define SIG_COEF_CONTEXTS_1D 16
+#define SIG_COEF_CONTEXTS_EOB 4
+#define SIG_COEF_CONTEXTS (SIG_COEF_CONTEXTS_2D + SIG_COEF_CONTEXTS_1D)
+
+#define COEFF_BASE_CONTEXTS (SIG_COEF_CONTEXTS)
+#define DC_SIGN_CONTEXTS 3
+
+#define BR_TMP_OFFSET 12
+#define BR_REF_CAT 4
+#define LEVEL_CONTEXTS 21
+
+#define NUM_BASE_LEVELS 2
+
+#define BR_CDF_SIZE (4)
+#define COEFF_BASE_RANGE (4 * (BR_CDF_SIZE - 1))
+
+#define COEFF_CONTEXT_BITS 6
+#define COEFF_CONTEXT_MASK ((1 << COEFF_CONTEXT_BITS) - 1)
+#define MAX_BASE_BR_RANGE (COEFF_BASE_RANGE + NUM_BASE_LEVELS + 1)
+
+#define BASE_CONTEXT_POSITION_NUM 12
+
+typedef enum TX_CLASS {
+  TX_CLASS_2D = 0,
+  TX_CLASS_HORIZ = 1,
+  TX_CLASS_VERT = 2,
+  TX_CLASSES = 3,
+} TX_CLASS;
+
+#define DCT_MAX_VALUE 16384
+#define DCT_MAX_VALUE_HIGH10 65536
+#define DCT_MAX_VALUE_HIGH12 262144
+
+/* Coefficients are predicted via a 3-dimensional probability table indexed on
+ * REF_TYPES, COEF_BANDS and COEF_CONTEXTS. */
+#define REF_TYPES 2  // intra=0, inter=1
+
+struct AV1Common;
+struct frame_contexts;
+void av1_reset_cdf_symbol_counters(struct frame_contexts *fc);
+void av1_default_coef_probs(struct AV1Common *cm);
+
+struct frame_contexts;
+
+typedef char ENTROPY_CONTEXT;
+
+static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
+                                           ENTROPY_CONTEXT b) {
+  return (a != 0) + (b != 0);
+}
+
+static INLINE int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a,
+                                      const ENTROPY_CONTEXT *l) {
+  ENTROPY_CONTEXT above_ec = 0, left_ec = 0;
+
+  switch (tx_size) {
+    case TX_4X4:
+      above_ec = a[0] != 0;
+      left_ec = l[0] != 0;
+      break;
+    case TX_4X8:
+      above_ec = a[0] != 0;
+      left_ec = !!*(const uint16_t *)l;
+      break;
+    case TX_8X4:
+      above_ec = !!*(const uint16_t *)a;
+      left_ec = l[0] != 0;
+      break;
+    case TX_8X16:
+      above_ec = !!*(const uint16_t *)a;
+      left_ec = !!*(const uint32_t *)l;
+      break;
+    case TX_16X8:
+      above_ec = !!*(const uint32_t *)a;
+      left_ec = !!*(const uint16_t *)l;
+      break;
+    case TX_16X32:
+      above_ec = !!*(const uint32_t *)a;
+      left_ec = !!*(const uint64_t *)l;
+      break;
+    case TX_32X16:
+      above_ec = !!*(const uint64_t *)a;
+      left_ec = !!*(const uint32_t *)l;
+      break;
+    case TX_8X8:
+      above_ec = !!*(const uint16_t *)a;
+      left_ec = !!*(const uint16_t *)l;
+      break;
+    case TX_16X16:
+      above_ec = !!*(const uint32_t *)a;
+      left_ec = !!*(const uint32_t *)l;
+      break;
+    case TX_32X32:
+      above_ec = !!*(const uint64_t *)a;
+      left_ec = !!*(const uint64_t *)l;
+      break;
+    case TX_64X64:
+      above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
+      left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
+      break;
+    case TX_32X64:
+      above_ec = !!*(const uint64_t *)a;
+      left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
+      break;
+    case TX_64X32:
+      above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
+      left_ec = !!*(const uint64_t *)l;
+      break;
+    case TX_4X16:
+      above_ec = a[0] != 0;
+      left_ec = !!*(const uint32_t *)l;
+      break;
+    case TX_16X4:
+      above_ec = !!*(const uint32_t *)a;
+      left_ec = l[0] != 0;
+      break;
+    case TX_8X32:
+      above_ec = !!*(const uint16_t *)a;
+      left_ec = !!*(const uint64_t *)l;
+      break;
+    case TX_32X8:
+      above_ec = !!*(const uint64_t *)a;
+      left_ec = !!*(const uint16_t *)l;
+      break;
+    case TX_16X64:
+      above_ec = !!*(const uint32_t *)a;
+      left_ec = !!(*(const uint64_t *)l | *(const uint64_t *)(l + 8));
+      break;
+    case TX_64X16:
+      above_ec = !!(*(const uint64_t *)a | *(const uint64_t *)(a + 8));
+      left_ec = !!*(const uint32_t *)l;
+      break;
+    default: assert(0 && "Invalid transform size."); break;
+  }
+  return combine_entropy_contexts(above_ec, left_ec);
+}
+
+static INLINE TX_SIZE get_txsize_entropy_ctx(TX_SIZE txsize) {
+  return (TX_SIZE)((txsize_sqr_map[txsize] + txsize_sqr_up_map[txsize] + 1) >>
+                   1);
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_COMMON_ENTROPY_H_