1 files changed, 84 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/quant_common.h b/third_party/aom/av1/common/quant_common.h
new file mode 100644
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+++ b/third_party/aom/av1/common/quant_common.h
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+/*
+ * 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_QUANT_COMMON_H_
+#define AOM_AV1_COMMON_QUANT_COMMON_H_
+
+#include <stdbool.h>
+#include "aom/aom_codec.h"
+#include "av1/common/seg_common.h"
+#include "av1/common/enums.h"
+#include "av1/common/entropy.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MINQ 0
+#define MAXQ 255
+#define QINDEX_RANGE (MAXQ - MINQ + 1)
+#define QINDEX_BITS 8
+// Total number of QM sets stored
+#define QM_LEVEL_BITS 4
+#define NUM_QM_LEVELS (1 << QM_LEVEL_BITS)
+/* Range of QMS is between first and last value, with offset applied to inter
+ * blocks*/
+#define DEFAULT_QM_Y 10
+#define DEFAULT_QM_U 11
+#define DEFAULT_QM_V 12
+#define DEFAULT_QM_FIRST 5
+#define DEFAULT_QM_LAST 9
+#define LOSSLESS_Q_STEP 4  // this should equal to dc/ac_qlookup_QTX[0]
+
+struct AV1Common;
+struct CommonQuantParams;
+struct macroblockd;
+
+int16_t av1_dc_quant_QTX(int qindex, int delta, aom_bit_depth_t bit_depth);
+int16_t av1_ac_quant_QTX(int qindex, int delta, aom_bit_depth_t bit_depth);
+
+int av1_get_qindex(const struct segmentation *seg, int segment_id,
+                   int base_qindex);
+
+// Returns true if we are using quantization matrix.
+bool av1_use_qmatrix(const struct CommonQuantParams *quant_params,
+                     const struct macroblockd *xd, int segment_id);
+
+// Reduce the large number of quantizers to a smaller number of levels for which
+// different matrices may be defined
+static INLINE int aom_get_qmlevel(int qindex, int first, int last) {
+  return first + (qindex * (last + 1 - first)) / QINDEX_RANGE;
+}
+
+// Initialize all global quant/dequant matrices.
+void av1_qm_init(struct CommonQuantParams *quant_params, int num_planes);
+
+// Get global dequant matrix.
+const qm_val_t *av1_iqmatrix(const struct CommonQuantParams *quant_params,
+                             int qmlevel, int plane, TX_SIZE tx_size);
+// Get global quant matrix.
+const qm_val_t *av1_qmatrix(const struct CommonQuantParams *quant_params,
+                            int qmlevel, int plane, TX_SIZE tx_size);
+
+// Get either local / global dequant matrix as appropriate.
+const qm_val_t *av1_get_iqmatrix(const struct CommonQuantParams *quant_params,
+                                 const struct macroblockd *xd, int plane,
+                                 TX_SIZE tx_size, TX_TYPE tx_type);
+// Get either local / global quant matrix as appropriate.
+const qm_val_t *av1_get_qmatrix(const struct CommonQuantParams *quant_params,
+                                const struct macroblockd *xd, int plane,
+                                TX_SIZE tx_size, TX_TYPE tx_type);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_COMMON_QUANT_COMMON_H_