Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 52 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/pvq_state.h b/third_party/aom/av1/common/pvq_state.h
new file mode 100644
index 000000000..84d454e70
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+++ b/third_party/aom/av1/common/pvq_state.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2001-2016, 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.
+ */
+
+/* clang-format off */
+
+#if !defined(_state_H)
+# define _state_H (1)
+
+typedef struct od_state     od_state;
+typedef struct od_adapt_ctx od_adapt_ctx;
+
+# include "generic_code.h"
+# include "odintrin.h"
+# include "pvq.h"
+
+/*Adaptation speed of scalar Laplace encoding.*/
+# define OD_SCALAR_ADAPT_SPEED (4)
+
+struct od_adapt_ctx {
+  /* Support for PVQ encode/decode */
+  od_pvq_adapt_ctx pvq;
+
+  generic_encoder model_dc[OD_NPLANES_MAX];
+
+  int ex_dc[OD_NPLANES_MAX][OD_TXSIZES][3];
+  int ex_g[OD_NPLANES_MAX][OD_TXSIZES];
+
+  /* Joint skip flag for DC and AC */
+  uint16_t skip_cdf[OD_TXSIZES*2][CDF_SIZE(4)];
+};
+
+struct od_state {
+  od_adapt_ctx *adapt;
+  unsigned char pvq_qm_q4[OD_NPLANES_MAX][OD_QM_SIZE];
+  /* Quantization matrices and their inverses. */
+  int16_t qm[OD_QM_BUFFER_SIZE];
+  int16_t qm_inv[OD_QM_BUFFER_SIZE];
+};
+
+void od_adapt_ctx_reset(od_adapt_ctx *state, int is_keyframe);
+void od_init_skipped_coeffs(int16_t *d, int16_t *pred, int is_keyframe,
+ int bo, int n, int w);
+
+#endif