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Diffstat (limited to 'third_party/aom/aom_dsp/txfm_common.h')
| -rw-r--r-- | third_party/aom/aom_dsp/txfm_common.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/txfm_common.h b/third_party/aom/aom_dsp/txfm_common.h new file mode 100644 index 000000000..f98242840 --- /dev/null +++ b/third_party/aom/aom_dsp/txfm_common.h @@ -0,0 +1,91 @@ +/* + * 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_AOM_DSP_TXFM_COMMON_H_ +#define AOM_AOM_DSP_TXFM_COMMON_H_ + +#include "aom_dsp/aom_dsp_common.h" +#include "av1/common/enums.h" + +// Constants and Macros used by all idct/dct functions +#define DCT_CONST_BITS 14 +#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) + +#define UNIT_QUANT_SHIFT 2 +#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) + +typedef struct txfm_param { + // for both forward and inverse transforms + TX_TYPE tx_type; + TX_SIZE tx_size; + int lossless; + int bd; + // are the pixel buffers octets or shorts? This should collapse to + // bd==8 implies !is_hbd, but that's not certain right now. + int is_hbd; + TxSetType tx_set_type; + // for inverse transforms only + int eob; +} TxfmParam; + +// Constants: +// for (int i = 1; i< 32; ++i) +// printf("static const int cospi_%d_64 = %.0f;\n", i, +// round(16384 * cos(i*M_PI/64))); +// Note: sin(k*Pi/64) = cos((32-k)*Pi/64) +static const tran_high_t cospi_1_64 = 16364; +static const tran_high_t cospi_2_64 = 16305; +static const tran_high_t cospi_3_64 = 16207; +static const tran_high_t cospi_4_64 = 16069; +static const tran_high_t cospi_5_64 = 15893; +static const tran_high_t cospi_6_64 = 15679; +static const tran_high_t cospi_7_64 = 15426; +static const tran_high_t cospi_8_64 = 15137; +static const tran_high_t cospi_9_64 = 14811; +static const tran_high_t cospi_10_64 = 14449; +static const tran_high_t cospi_11_64 = 14053; +static const tran_high_t cospi_12_64 = 13623; +static const tran_high_t cospi_13_64 = 13160; +static const tran_high_t cospi_14_64 = 12665; +static const tran_high_t cospi_15_64 = 12140; +static const tran_high_t cospi_16_64 = 11585; +static const tran_high_t cospi_17_64 = 11003; +static const tran_high_t cospi_18_64 = 10394; +static const tran_high_t cospi_19_64 = 9760; +static const tran_high_t cospi_20_64 = 9102; +static const tran_high_t cospi_21_64 = 8423; +static const tran_high_t cospi_22_64 = 7723; +static const tran_high_t cospi_23_64 = 7005; +static const tran_high_t cospi_24_64 = 6270; +static const tran_high_t cospi_25_64 = 5520; +static const tran_high_t cospi_26_64 = 4756; +static const tran_high_t cospi_27_64 = 3981; +static const tran_high_t cospi_28_64 = 3196; +static const tran_high_t cospi_29_64 = 2404; +static const tran_high_t cospi_30_64 = 1606; +static const tran_high_t cospi_31_64 = 804; + +// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 +static const tran_high_t sinpi_1_9 = 5283; +static const tran_high_t sinpi_2_9 = 9929; +static const tran_high_t sinpi_3_9 = 13377; +static const tran_high_t sinpi_4_9 = 15212; + +// 16384 * sqrt(2) +static const tran_high_t Sqrt2 = 23170; +static const tran_high_t InvSqrt2 = 11585; + +static INLINE tran_high_t fdct_round_shift(tran_high_t input) { + tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); + return rv; +} + +#endif // AOM_AOM_DSP_TXFM_COMMON_H_ |