diff options
Diffstat (limited to 'media/libvpx/libvpx/vpx_dsp/txfm_common.h')
| -rw-r--r-- | media/libvpx/libvpx/vpx_dsp/txfm_common.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/txfm_common.h b/media/libvpx/libvpx/vpx_dsp/txfm_common.h new file mode 100644 index 0000000000..25f4fdb327 --- /dev/null +++ b/media/libvpx/libvpx/vpx_dsp/txfm_common.h @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2015 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef VPX_VPX_DSP_TXFM_COMMON_H_ +#define VPX_VPX_DSP_TXFM_COMMON_H_ + +#include "vpx_dsp/vpx_dsp_common.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) + +// 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_coef_t cospi_1_64 = 16364; +static const tran_coef_t cospi_2_64 = 16305; +static const tran_coef_t cospi_3_64 = 16207; +static const tran_coef_t cospi_4_64 = 16069; +static const tran_coef_t cospi_5_64 = 15893; +static const tran_coef_t cospi_6_64 = 15679; +static const tran_coef_t cospi_7_64 = 15426; +static const tran_coef_t cospi_8_64 = 15137; +static const tran_coef_t cospi_9_64 = 14811; +static const tran_coef_t cospi_10_64 = 14449; +static const tran_coef_t cospi_11_64 = 14053; +static const tran_coef_t cospi_12_64 = 13623; +static const tran_coef_t cospi_13_64 = 13160; +static const tran_coef_t cospi_14_64 = 12665; +static const tran_coef_t cospi_15_64 = 12140; +static const tran_coef_t cospi_16_64 = 11585; +static const tran_coef_t cospi_17_64 = 11003; +static const tran_coef_t cospi_18_64 = 10394; +static const tran_coef_t cospi_19_64 = 9760; +static const tran_coef_t cospi_20_64 = 9102; +static const tran_coef_t cospi_21_64 = 8423; +static const tran_coef_t cospi_22_64 = 7723; +static const tran_coef_t cospi_23_64 = 7005; +static const tran_coef_t cospi_24_64 = 6270; +static const tran_coef_t cospi_25_64 = 5520; +static const tran_coef_t cospi_26_64 = 4756; +static const tran_coef_t cospi_27_64 = 3981; +static const tran_coef_t cospi_28_64 = 3196; +static const tran_coef_t cospi_29_64 = 2404; +static const tran_coef_t cospi_30_64 = 1606; +static const tran_coef_t cospi_31_64 = 804; + +// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 +static const tran_coef_t sinpi_1_9 = 5283; +static const tran_coef_t sinpi_2_9 = 9929; +static const tran_coef_t sinpi_3_9 = 13377; +static const tran_coef_t sinpi_4_9 = 15212; + +#endif // VPX_VPX_DSP_TXFM_COMMON_H_ |