/src/aom/av1/encoder/encodemb.h

Source (jump to first uncovered line)
/*
 * 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_ENCODER_ENCODEMB_H_
#define AOM_AV1_ENCODER_ENCODEMB_H_

#include "config/aom_config.h"

#include "av1/common/av1_common_int.h"
#include "av1/common/txb_common.h"
#include "av1/encoder/av1_quantize.h"
#include "av1/encoder/block.h"
#include "av1/encoder/tokenize.h"
#ifdef __cplusplus
extern "C" {
#endif

enum {
  AV1_XFORM_QUANT_FP = 0,
  AV1_XFORM_QUANT_B = 1,
  AV1_XFORM_QUANT_DC = 2,
  AV1_XFORM_QUANT_SKIP_QUANT,
  AV1_XFORM_QUANT_TYPES,
} UENUM1BYTE(AV1_XFORM_QUANT);

// TODO(any): Merge OPT_TYPe and TRELLLIS_OPT_TYPE
// Available optimization types to optimize the quantized coefficients.
enum {
  NONE_OPT = 0,            // No optimization.
  TRELLIS_OPT = 1,         // Trellis optimization. See `av1_optimize_b()`.
  DROPOUT_OPT = 2,         // Dropout optimization. See `av1_dropout_qcoeff()`.
  TRELLIS_DROPOUT_OPT = 3  // Perform dropout after trellis optimization.
} UENUM1BYTE(OPT_TYPE);

enum {
  NO_TRELLIS_OPT,          // No trellis optimization
  FULL_TRELLIS_OPT,        // Trellis optimization in all stages
  FINAL_PASS_TRELLIS_OPT,  // Trellis optimization in only the final encode pass
  NO_ESTIMATE_YRD_TRELLIS_OPT  // Disable trellis in estimate_yrd_for_sb
} UENUM1BYTE(TRELLIS_OPT_TYPE);

struct optimize_ctx {
  ENTROPY_CONTEXT ta[MAX_MB_PLANE][MAX_MIB_SIZE];
  ENTROPY_CONTEXT tl[MAX_MB_PLANE][MAX_MIB_SIZE];
};

struct encode_b_args {
  const struct AV1_COMP *cpi;
  MACROBLOCK *x;
  struct optimize_ctx *ctx;
  ENTROPY_CONTEXT *ta;
  ENTROPY_CONTEXT *tl;
  RUN_TYPE dry_run;
  TRELLIS_OPT_TYPE enable_optimize_b;
};

void av1_encode_sb(const struct AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize,
                   RUN_TYPE dry_run);

void av1_foreach_transformed_block_in_plane(
    const MACROBLOCKD *const xd, BLOCK_SIZE plane_bsize, int plane,
    foreach_transformed_block_visitor visit, void *arg);

void av1_encode_sby_pass1(struct AV1_COMP *cpi, MACROBLOCK *x,
                          BLOCK_SIZE bsize);

void av1_setup_xform(const AV1_COMMON *cm, MACROBLOCK *x, TX_SIZE tx_size,
                     TX_TYPE tx_type, TxfmParam *txfm_param);
void av1_setup_quant(TX_SIZE tx_size, int use_optimize_b, int xform_quant_idx,
                     int use_quant_b_adapt, QUANT_PARAM *qparam);
void av1_setup_qmatrix(const CommonQuantParams *quant_params,
                       const MACROBLOCKD *xd, int plane, TX_SIZE tx_size,
                       TX_TYPE tx_type, QUANT_PARAM *qparam);

void av1_xform_dc_only(MACROBLOCK *x, int plane, int block,
                       TxfmParam *txfm_param, int64_t per_px_mean);

void av1_xform_quant(MACROBLOCK *x, int plane, int block, int blk_row,
                     int blk_col, BLOCK_SIZE plane_bsize, TxfmParam *txfm_param,
                     const QUANT_PARAM *qparam);

void av1_xform(MACROBLOCK *x, int plane, int block, int blk_row, int blk_col,
               BLOCK_SIZE plane_bsize, TxfmParam *txfm_param);

void av1_quant(MACROBLOCK *x, int plane, int block, TxfmParam *txfm_param,
               const QUANT_PARAM *qparam);

int av1_optimize_b(const struct AV1_COMP *cpi, MACROBLOCK *mb, int plane,
                   int block, TX_SIZE tx_size, TX_TYPE tx_type,
                   const TXB_CTX *const txb_ctx, int *rate_cost);

// This function can be used as (i) a further optimization to reduce the
// redundancy of quantized coefficients (a.k.a., `qcoeff`) after trellis
// optimization, or (ii) an alternative to trellis optimization in high-speed
// compression mode (e.g., real-time mode under speed-6) due to its LOW time
// complexity. The rational behind is to drop out the may-be redundant quantized
// coefficient which is among a bunch of zeros. NOTE: This algorithm is not as
// accurate as trellis optimization since the hyper-parameters are hard-coded
// instead of dynamic search. More adaptive logic may improve the performance.
// This function should be applied to all or partical block cells.
// Inputs:
//   mb: Pointer to the MACROBLOCK to perform dropout on.
//   plane: Index of the plane to which the target block belongs.
//   block: Index of the target block.
//   tx_size: Transform size of the target block.
//   tx_type: Transform type of the target block. This field is particularly
//            used to find out the scan order of the block.
//   qindex: Quantization index used for target block. In general, all blocks
//           in a same plane share the same quantization index. This field is
//           particularly used to determine how many zeros should be used to
//           drop out a coefficient.
// Returns:
//   Nothing will be returned, but `qcoeff`, `dqcoeff`, `eob`, as well as
//   `txb_entropy_ctx`, which `mb` points to, may be modified by this function.
void av1_dropout_qcoeff(MACROBLOCK *mb, int plane, int block, TX_SIZE tx_size,
                        TX_TYPE tx_type, int qindex);
// Same as above, with the number of zeroes needed before/after a coeff to drop
// it explicitly passed in, instead of being derived from qindex.
void av1_dropout_qcoeff_num(MACROBLOCK *mb, int plane, int block,
                            TX_SIZE tx_size, TX_TYPE tx_type,
                            int dropout_num_before, int dropout_num_after);

void av1_subtract_block(BitDepthInfo bd_info, int rows, int cols, int16_t *diff,
                        ptrdiff_t diff_stride, const uint8_t *src8,
                        ptrdiff_t src_stride, const uint8_t *pred8,
                        ptrdiff_t pred_stride);

void av1_subtract_txb(MACROBLOCK *x, int plane, BLOCK_SIZE plane_bsize,
                      int blk_col, int blk_row, TX_SIZE tx_size);

void av1_subtract_plane(MACROBLOCK *x, BLOCK_SIZE plane_bsize, int plane);

static inline void av1_set_txb_context(MACROBLOCK *x, int plane, int block,
                                       TX_SIZE tx_size, ENTROPY_CONTEXT *a,
                                       ENTROPY_CONTEXT *l) {
  const uint8_t ctx = x->plane[plane].txb_entropy_ctx[block];
  memset(a, ctx, tx_size_wide_unit[tx_size] * sizeof(*a));
  memset(l, ctx, tx_size_high_unit[tx_size] * sizeof(*l));
}

void av1_encode_intra_block_plane(const struct AV1_COMP *cpi, MACROBLOCK *x,
                                  BLOCK_SIZE bsize, int plane, RUN_TYPE dry_run,
                                  TRELLIS_OPT_TYPE enable_optimize_b);

static inline int is_trellis_used(TRELLIS_OPT_TYPE optimize_b,
                                  RUN_TYPE dry_run) {
  if (optimize_b == NO_TRELLIS_OPT) return false;
  if (optimize_b == FINAL_PASS_TRELLIS_OPT && dry_run != OUTPUT_ENABLED)
    return false;
  return true;
}

// Scaling terms (precision of 12 bits) to perform tx-size specific
// normalization that is used in DCT_DCT forward transform.
// For transform blocks of 1:2 and 2:1       - sqrt(2) normalization is used
// For transform blocks of 1:4 and 4:1       - factor of 2 is used
// For transform blocks TX_8x8 and below     - an additional factor of 2 is used
// For transform blocks max(width,height)=64 - currently not supported

static const uint16_t dc_coeff_scale[TX_SIZES_ALL] = {
  1024, 2048, 4096, 4096, 0,    1448, 1448, 2896, 2896, 2896,
  2896, 0,    0,    2048, 2048, 4096, 4096, 0,    0
};

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // AOM_AV1_ENCODER_ENCODEMB_H_

Coverage Report

Created: 2025-06-22 08:04

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3		*
4		* This source code is subject to the terms of the BSD 2 Clause License and
5		* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6		* was not distributed with this source code in the LICENSE file, you can
7		* obtain it at www.aomedia.org/license/software. If the Alliance for Open
8		* Media Patent License 1.0 was not distributed with this source code in the
9		* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10		*/
11
12		#ifndef AOM_AV1_ENCODER_ENCODEMB_H_
13		#define AOM_AV1_ENCODER_ENCODEMB_H_
14
15		#include "config/aom_config.h"
16
17		#include "av1/common/av1_common_int.h"
18		#include "av1/common/txb_common.h"
19		#include "av1/encoder/av1_quantize.h"
20		#include "av1/encoder/block.h"
21		#include "av1/encoder/tokenize.h"
22		#ifdef __cplusplus
23		extern "C" {
24		#endif
25
26		enum {
27		AV1_XFORM_QUANT_FP = 0,
28		AV1_XFORM_QUANT_B = 1,
29		AV1_XFORM_QUANT_DC = 2,
30		AV1_XFORM_QUANT_SKIP_QUANT,
31		AV1_XFORM_QUANT_TYPES,
32		} UENUM1BYTE(AV1_XFORM_QUANT);
33
34		// TODO(any): Merge OPT_TYPe and TRELLLIS_OPT_TYPE
35		// Available optimization types to optimize the quantized coefficients.
36		enum {
37		NONE_OPT = 0, // No optimization.
38		TRELLIS_OPT = 1, // Trellis optimization. See `av1_optimize_b()`.
39		DROPOUT_OPT = 2, // Dropout optimization. See `av1_dropout_qcoeff()`.
40		TRELLIS_DROPOUT_OPT = 3 // Perform dropout after trellis optimization.
41		} UENUM1BYTE(OPT_TYPE);
42
43		enum {
44		NO_TRELLIS_OPT, // No trellis optimization
45		FULL_TRELLIS_OPT, // Trellis optimization in all stages
46		FINAL_PASS_TRELLIS_OPT, // Trellis optimization in only the final encode pass
47		NO_ESTIMATE_YRD_TRELLIS_OPT // Disable trellis in estimate_yrd_for_sb
48		} UENUM1BYTE(TRELLIS_OPT_TYPE);
49
50		struct optimize_ctx {
51		ENTROPY_CONTEXT ta[MAX_MB_PLANE][MAX_MIB_SIZE];
52		ENTROPY_CONTEXT tl[MAX_MB_PLANE][MAX_MIB_SIZE];
53		};
54
55		struct encode_b_args {
56		const struct AV1_COMP *cpi;
57		MACROBLOCK *x;
58		struct optimize_ctx *ctx;
59		ENTROPY_CONTEXT *ta;
60		ENTROPY_CONTEXT *tl;
61		RUN_TYPE dry_run;
62		TRELLIS_OPT_TYPE enable_optimize_b;
63		};
64
65		void av1_encode_sb(const struct AV1_COMP cpi, MACROBLOCK x, BLOCK_SIZE bsize,
66		RUN_TYPE dry_run);
67
68		void av1_foreach_transformed_block_in_plane(
69		const MACROBLOCKD *const xd, BLOCK_SIZE plane_bsize, int plane,
70		foreach_transformed_block_visitor visit, void *arg);
71
72		void av1_encode_sby_pass1(struct AV1_COMP cpi, MACROBLOCK x,
73		BLOCK_SIZE bsize);
74
75		void av1_setup_xform(const AV1_COMMON cm, MACROBLOCK x, TX_SIZE tx_size,
76		TX_TYPE tx_type, TxfmParam *txfm_param);
77		void av1_setup_quant(TX_SIZE tx_size, int use_optimize_b, int xform_quant_idx,
78		int use_quant_b_adapt, QUANT_PARAM *qparam);
79		void av1_setup_qmatrix(const CommonQuantParams *quant_params,
80		const MACROBLOCKD *xd, int plane, TX_SIZE tx_size,
81		TX_TYPE tx_type, QUANT_PARAM *qparam);
82
83		void av1_xform_dc_only(MACROBLOCK *x, int plane, int block,
84		TxfmParam *txfm_param, int64_t per_px_mean);
85
86		void av1_xform_quant(MACROBLOCK *x, int plane, int block, int blk_row,
87		int blk_col, BLOCK_SIZE plane_bsize, TxfmParam *txfm_param,
88		const QUANT_PARAM *qparam);
89
90		void av1_xform(MACROBLOCK *x, int plane, int block, int blk_row, int blk_col,
91		BLOCK_SIZE plane_bsize, TxfmParam *txfm_param);
92
93		void av1_quant(MACROBLOCK x, int plane, int block, TxfmParam txfm_param,
94		const QUANT_PARAM *qparam);
95
96		int av1_optimize_b(const struct AV1_COMP cpi, MACROBLOCK mb, int plane,
97		int block, TX_SIZE tx_size, TX_TYPE tx_type,
98		const TXB_CTX const txb_ctx, int rate_cost);
99
100		// This function can be used as (i) a further optimization to reduce the
101		// redundancy of quantized coefficients (a.k.a., `qcoeff`) after trellis
102		// optimization, or (ii) an alternative to trellis optimization in high-speed
103		// compression mode (e.g., real-time mode under speed-6) due to its LOW time
104		// complexity. The rational behind is to drop out the may-be redundant quantized
105		// coefficient which is among a bunch of zeros. NOTE: This algorithm is not as
106		// accurate as trellis optimization since the hyper-parameters are hard-coded
107		// instead of dynamic search. More adaptive logic may improve the performance.
108		// This function should be applied to all or partical block cells.
109		// Inputs:
110		// mb: Pointer to the MACROBLOCK to perform dropout on.
111		// plane: Index of the plane to which the target block belongs.
112		// block: Index of the target block.
113		// tx_size: Transform size of the target block.
114		// tx_type: Transform type of the target block. This field is particularly
115		// used to find out the scan order of the block.
116		// qindex: Quantization index used for target block. In general, all blocks
117		// in a same plane share the same quantization index. This field is
118		// particularly used to determine how many zeros should be used to
119		// drop out a coefficient.
120		// Returns:
121		// Nothing will be returned, but `qcoeff`, `dqcoeff`, `eob`, as well as
122		// `txb_entropy_ctx`, which `mb` points to, may be modified by this function.
123		void av1_dropout_qcoeff(MACROBLOCK *mb, int plane, int block, TX_SIZE tx_size,
124		TX_TYPE tx_type, int qindex);
125		// Same as above, with the number of zeroes needed before/after a coeff to drop
126		// it explicitly passed in, instead of being derived from qindex.
127		void av1_dropout_qcoeff_num(MACROBLOCK *mb, int plane, int block,
128		TX_SIZE tx_size, TX_TYPE tx_type,
129		int dropout_num_before, int dropout_num_after);
130
131		void av1_subtract_block(BitDepthInfo bd_info, int rows, int cols, int16_t *diff,
132		ptrdiff_t diff_stride, const uint8_t *src8,
133		ptrdiff_t src_stride, const uint8_t *pred8,
134		ptrdiff_t pred_stride);
135
136		void av1_subtract_txb(MACROBLOCK *x, int plane, BLOCK_SIZE plane_bsize,
137		int blk_col, int blk_row, TX_SIZE tx_size);
138
139		void av1_subtract_plane(MACROBLOCK *x, BLOCK_SIZE plane_bsize, int plane);
140
141		static inline void av1_set_txb_context(MACROBLOCK *x, int plane, int block,
142		TX_SIZE tx_size, ENTROPY_CONTEXT *a,
143	0	ENTROPY_CONTEXT *l) {
144	0	const uint8_t ctx = x->plane[plane].txb_entropy_ctx[block];
145	0	memset(a, ctx, tx_size_wide_unit[tx_size] * sizeof(*a));
146	0	memset(l, ctx, tx_size_high_unit[tx_size] * sizeof(*l));
147	0	} Unexecuted instantiation: av1_cx_iface.c:av1_set_txb_context Unexecuted instantiation: allintra_vis.c:av1_set_txb_context Unexecuted instantiation: av1_quantize.c:av1_set_txb_context Unexecuted instantiation: bitstream.c:av1_set_txb_context Unexecuted instantiation: context_tree.c:av1_set_txb_context Unexecuted instantiation: encodeframe.c:av1_set_txb_context Unexecuted instantiation: encodeframe_utils.c:av1_set_txb_context Unexecuted instantiation: encodemb.c:av1_set_txb_context Unexecuted instantiation: encodemv.c:av1_set_txb_context Unexecuted instantiation: encoder.c:av1_set_txb_context Unexecuted instantiation: encoder_utils.c:av1_set_txb_context Unexecuted instantiation: encodetxb.c:av1_set_txb_context Unexecuted instantiation: ethread.c:av1_set_txb_context Unexecuted instantiation: firstpass.c:av1_set_txb_context Unexecuted instantiation: global_motion_facade.c:av1_set_txb_context Unexecuted instantiation: level.c:av1_set_txb_context Unexecuted instantiation: lookahead.c:av1_set_txb_context Unexecuted instantiation: mcomp.c:av1_set_txb_context Unexecuted instantiation: mv_prec.c:av1_set_txb_context Unexecuted instantiation: palette.c:av1_set_txb_context Unexecuted instantiation: partition_search.c:av1_set_txb_context Unexecuted instantiation: partition_strategy.c:av1_set_txb_context Unexecuted instantiation: pass2_strategy.c:av1_set_txb_context Unexecuted instantiation: pickcdef.c:av1_set_txb_context Unexecuted instantiation: picklpf.c:av1_set_txb_context Unexecuted instantiation: pickrst.c:av1_set_txb_context Unexecuted instantiation: ratectrl.c:av1_set_txb_context Unexecuted instantiation: rd.c:av1_set_txb_context Unexecuted instantiation: rdopt.c:av1_set_txb_context Unexecuted instantiation: nonrd_pickmode.c:av1_set_txb_context Unexecuted instantiation: nonrd_opt.c:av1_set_txb_context Unexecuted instantiation: segmentation.c:av1_set_txb_context Unexecuted instantiation: speed_features.c:av1_set_txb_context Unexecuted instantiation: superres_scale.c:av1_set_txb_context Unexecuted instantiation: svc_layercontext.c:av1_set_txb_context Unexecuted instantiation: temporal_filter.c:av1_set_txb_context Unexecuted instantiation: tokenize.c:av1_set_txb_context Unexecuted instantiation: tpl_model.c:av1_set_txb_context Unexecuted instantiation: tx_search.c:av1_set_txb_context Unexecuted instantiation: txb_rdopt.c:av1_set_txb_context Unexecuted instantiation: intra_mode_search.c:av1_set_txb_context Unexecuted instantiation: var_based_part.c:av1_set_txb_context Unexecuted instantiation: av1_noise_estimate.c:av1_set_txb_context Unexecuted instantiation: aq_complexity.c:av1_set_txb_context Unexecuted instantiation: aq_cyclicrefresh.c:av1_set_txb_context Unexecuted instantiation: aq_variance.c:av1_set_txb_context Unexecuted instantiation: compound_type.c:av1_set_txb_context Unexecuted instantiation: encode_strategy.c:av1_set_txb_context Unexecuted instantiation: global_motion.c:av1_set_txb_context Unexecuted instantiation: gop_structure.c:av1_set_txb_context Unexecuted instantiation: interp_search.c:av1_set_txb_context Unexecuted instantiation: motion_search_facade.c:av1_set_txb_context
148
149		void av1_encode_intra_block_plane(const struct AV1_COMP cpi, MACROBLOCK x,
150		BLOCK_SIZE bsize, int plane, RUN_TYPE dry_run,
151		TRELLIS_OPT_TYPE enable_optimize_b);
152
153		static inline int is_trellis_used(TRELLIS_OPT_TYPE optimize_b,
154	0	RUN_TYPE dry_run) {
155	0	if (optimize_b == NO_TRELLIS_OPT) return false;
156	0	if (optimize_b == FINAL_PASS_TRELLIS_OPT && dry_run != OUTPUT_ENABLED)
157	0	return false;
158	0	return true;
159	0	} Unexecuted instantiation: av1_cx_iface.c:is_trellis_used Unexecuted instantiation: allintra_vis.c:is_trellis_used Unexecuted instantiation: av1_quantize.c:is_trellis_used Unexecuted instantiation: bitstream.c:is_trellis_used Unexecuted instantiation: context_tree.c:is_trellis_used Unexecuted instantiation: encodeframe.c:is_trellis_used Unexecuted instantiation: encodeframe_utils.c:is_trellis_used Unexecuted instantiation: encodemb.c:is_trellis_used Unexecuted instantiation: encodemv.c:is_trellis_used Unexecuted instantiation: encoder.c:is_trellis_used Unexecuted instantiation: encoder_utils.c:is_trellis_used Unexecuted instantiation: encodetxb.c:is_trellis_used Unexecuted instantiation: ethread.c:is_trellis_used Unexecuted instantiation: firstpass.c:is_trellis_used Unexecuted instantiation: global_motion_facade.c:is_trellis_used Unexecuted instantiation: level.c:is_trellis_used Unexecuted instantiation: lookahead.c:is_trellis_used Unexecuted instantiation: mcomp.c:is_trellis_used Unexecuted instantiation: mv_prec.c:is_trellis_used Unexecuted instantiation: palette.c:is_trellis_used Unexecuted instantiation: partition_search.c:is_trellis_used Unexecuted instantiation: partition_strategy.c:is_trellis_used Unexecuted instantiation: pass2_strategy.c:is_trellis_used Unexecuted instantiation: pickcdef.c:is_trellis_used Unexecuted instantiation: picklpf.c:is_trellis_used Unexecuted instantiation: pickrst.c:is_trellis_used Unexecuted instantiation: ratectrl.c:is_trellis_used Unexecuted instantiation: rd.c:is_trellis_used Unexecuted instantiation: rdopt.c:is_trellis_used Unexecuted instantiation: nonrd_pickmode.c:is_trellis_used Unexecuted instantiation: nonrd_opt.c:is_trellis_used Unexecuted instantiation: segmentation.c:is_trellis_used Unexecuted instantiation: speed_features.c:is_trellis_used Unexecuted instantiation: superres_scale.c:is_trellis_used Unexecuted instantiation: svc_layercontext.c:is_trellis_used Unexecuted instantiation: temporal_filter.c:is_trellis_used Unexecuted instantiation: tokenize.c:is_trellis_used Unexecuted instantiation: tpl_model.c:is_trellis_used Unexecuted instantiation: tx_search.c:is_trellis_used Unexecuted instantiation: txb_rdopt.c:is_trellis_used Unexecuted instantiation: intra_mode_search.c:is_trellis_used Unexecuted instantiation: var_based_part.c:is_trellis_used Unexecuted instantiation: av1_noise_estimate.c:is_trellis_used Unexecuted instantiation: aq_complexity.c:is_trellis_used Unexecuted instantiation: aq_cyclicrefresh.c:is_trellis_used Unexecuted instantiation: aq_variance.c:is_trellis_used Unexecuted instantiation: compound_type.c:is_trellis_used Unexecuted instantiation: encode_strategy.c:is_trellis_used Unexecuted instantiation: global_motion.c:is_trellis_used Unexecuted instantiation: gop_structure.c:is_trellis_used Unexecuted instantiation: interp_search.c:is_trellis_used Unexecuted instantiation: motion_search_facade.c:is_trellis_used
160
161		// Scaling terms (precision of 12 bits) to perform tx-size specific
162		// normalization that is used in DCT_DCT forward transform.
163		// For transform blocks of 1:2 and 2:1 - sqrt(2) normalization is used
164		// For transform blocks of 1:4 and 4:1 - factor of 2 is used
165		// For transform blocks TX_8x8 and below - an additional factor of 2 is used
166		// For transform blocks max(width,height)=64 - currently not supported
167
168		static const uint16_t dc_coeff_scale[TX_SIZES_ALL] = {
169		1024, 2048, 4096, 4096, 0, 1448, 1448, 2896, 2896, 2896,
170		2896, 0, 0, 2048, 2048, 4096, 4096, 0, 0
171		};
172
173		#ifdef __cplusplus
174		} // extern "C"
175		#endif
176
177		#endif // AOM_AV1_ENCODER_ENCODEMB_H_