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, 81 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/generic_code.h b/third_party/aom/av1/common/generic_code.h
new file mode 100644
index 000000000..c9d87799d
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+++ b/third_party/aom/av1/common/generic_code.h
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+/*
+ * 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(_generic_code_H)
+# define _generic_code_H
+
+# include "aom_dsp/bitreader.h"
+# include "aom_dsp/bitwriter.h"
+
+# define GENERIC_TABLES 12
+
+#define generic_decode(r, model, ex_q16, integration, ACCT_STR_NAME) \
+  generic_decode_(r, model, ex_q16, integration ACCT_STR_ARG(ACCT_STR_NAME))
+#define aom_decode_cdf_adapt_q15(r, cdf, n, count, rate, ACCT_STR_NAME) \
+  aom_decode_cdf_adapt_q15_(r, cdf, n, count, rate ACCT_STR_ARG(ACCT_STR_NAME))
+#define aom_decode_cdf_adapt(r, cdf, n, increment, ACCT_STR_NAME) \
+  aom_decode_cdf_adapt_(r, cdf, n, increment ACCT_STR_ARG(ACCT_STR_NAME))
+
+typedef struct {
+  /** cdf for multiple expectations of x */
+  uint16_t cdf[GENERIC_TABLES][CDF_SIZE(16)];
+} generic_encoder;
+
+#define OD_IIR_DIADIC(y, x, shift) ((y) += ((x) - (y)) >> (shift))
+
+void generic_model_init(generic_encoder *model);
+
+/* Initialize a CDF for use by aom_write_symbol_pvq()/aom_read_symbol_pvq().
+   This is used for CDFs whose size might not match the declared array size.
+   The only real requirement is that the first value of every CDF be zero.
+   Then aom_cdf_init_q15_1D() will be called with the real size the first time
+   the CDF is used. */
+#define OD_CDFS_INIT_DYNAMIC(cdf) (memset(cdf, 0, sizeof(cdf)))
+
+// WARNING: DO NOT USE this init function,
+// if the size of cdf is different from what is declared by code.
+#define OD_CDFS_INIT_Q15(cdfs) \
+  { int n_cdfs = sizeof(cdfs)/sizeof(cdfs[0]); \
+    int cdf_size = sizeof(cdfs[0])/sizeof(cdfs[0][0]); \
+    int nsyms = cdf_size - CONFIG_EC_ADAPT; \
+    int i_; \
+    for (i_ = 0; i_ < n_cdfs; i_++) \
+      aom_cdf_init_q15_1D(cdfs[i_], nsyms, cdf_size); \
+  }
+
+void aom_cdf_init(uint16_t *cdf, int ncdfs, int nsyms, int val, int first);
+
+void aom_cdf_init_q15_1D(uint16_t *cdf, int nsyms, int cdf_size);
+
+void aom_cdf_adapt_q15(int val, uint16_t *cdf, int n, int *count, int rate);
+
+void aom_encode_cdf_adapt_q15(aom_writer *w, int val, uint16_t *cdf, int n,
+ int *count, int rate);
+
+void generic_encode(aom_writer *w, generic_encoder *model, int x,
+ int *ex_q16, int integration);
+double generic_encode_cost(generic_encoder *model, int x, int *ex_q16);
+
+double od_encode_cdf_cost(int val, uint16_t *cdf, int n);
+
+int aom_decode_cdf_adapt_q15_(aom_reader *r, uint16_t *cdf, int n,
+ int *count, int rate ACCT_STR_PARAM);
+
+int generic_decode_(aom_reader *r, generic_encoder *model,
+ int *ex_q16, int integration ACCT_STR_PARAM);
+
+int log_ex(int ex_q16);
+
+void generic_model_update(int *ex_q16, int x, int integration);
+
+#endif