| /* |
| * Copyright (c) 2010 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. |
| */ |
| |
| |
| /**************************************************************************** |
| * Notes: |
| * |
| * This implementation makes use of 16 bit fixed point verio of two multiply |
| * constants: |
| * 1. sqrt(2) * cos (pi/8) |
| * 2. sqrt(2) * sin (pi/8) |
| * Becuase the first constant is bigger than 1, to maintain the same 16 bit |
| * fixed point precision as the second one, we use a trick of |
| * x * a = x + x*(a-1) |
| * so |
| * x * sqrt(2) * cos (pi/8) = x + x * (sqrt(2) *cos(pi/8)-1). |
| **************************************************************************/ |
| #include <assert.h> |
| #include <math.h> |
| #include "vpx_ports/config.h" |
| #include "vp9/common/vp9_systemdependent.h" |
| |
| #include "vp9/common/vp9_blockd.h" |
| |
| static const int cospi8sqrt2minus1 = 20091; |
| static const int sinpi8sqrt2 = 35468; |
| static const int rounding = 0; |
| |
| // TODO: these transforms can be further converted into integer forms |
| // for complexity optimization |
| static const float idct_4[16] = { |
| 0.500000000000000, 0.653281482438188, 0.500000000000000, 0.270598050073099, |
| 0.500000000000000, 0.270598050073099, -0.500000000000000, -0.653281482438188, |
| 0.500000000000000, -0.270598050073099, -0.500000000000000, 0.653281482438188, |
| 0.500000000000000, -0.653281482438188, 0.500000000000000, -0.270598050073099 |
| }; |
| |
| static const float iadst_4[16] = { |
| 0.228013428883779, 0.577350269189626, 0.656538502008139, 0.428525073124360, |
| 0.428525073124360, 0.577350269189626, -0.228013428883779, -0.656538502008139, |
| 0.577350269189626, 0, -0.577350269189626, 0.577350269189626, |
| 0.656538502008139, -0.577350269189626, 0.428525073124359, -0.228013428883779 |
| }; |
| |
| static const float idct_8[64] = { |
| 0.353553390593274, 0.490392640201615, 0.461939766255643, 0.415734806151273, |
| 0.353553390593274, 0.277785116509801, 0.191341716182545, 0.097545161008064, |
| 0.353553390593274, 0.415734806151273, 0.191341716182545, -0.097545161008064, |
| -0.353553390593274, -0.490392640201615, -0.461939766255643, -0.277785116509801, |
| 0.353553390593274, 0.277785116509801, -0.191341716182545, -0.490392640201615, |
| -0.353553390593274, 0.097545161008064, 0.461939766255643, 0.415734806151273, |
| 0.353553390593274, 0.097545161008064, -0.461939766255643, -0.277785116509801, |
| 0.353553390593274, 0.415734806151273, -0.191341716182545, -0.490392640201615, |
| 0.353553390593274, -0.097545161008064, -0.461939766255643, 0.277785116509801, |
| 0.353553390593274, -0.415734806151273, -0.191341716182545, 0.490392640201615, |
| 0.353553390593274, -0.277785116509801, -0.191341716182545, 0.490392640201615, |
| -0.353553390593274, -0.097545161008064, 0.461939766255643, -0.415734806151273, |
| 0.353553390593274, -0.415734806151273, 0.191341716182545, 0.097545161008064, |
| -0.353553390593274, 0.490392640201615, -0.461939766255643, 0.277785116509801, |
| 0.353553390593274, -0.490392640201615, 0.461939766255643, -0.415734806151273, |
| 0.353553390593274, -0.277785116509801, 0.191341716182545, -0.097545161008064 |
| }; |
| |
| static const float iadst_8[64] = { |
| 0.089131608307533, 0.255357107325376, 0.387095214016349, 0.466553967085785, |
| 0.483002021635509, 0.434217976756762, 0.326790388032145, 0.175227946595735, |
| 0.175227946595735, 0.434217976756762, 0.466553967085785, 0.255357107325376, |
| -0.089131608307533, -0.387095214016348, -0.483002021635509, -0.326790388032145, |
| 0.255357107325376, 0.483002021635509, 0.175227946595735, -0.326790388032145, |
| -0.466553967085785, -0.089131608307533, 0.387095214016349, 0.434217976756762, |
| 0.326790388032145, 0.387095214016349, -0.255357107325376, -0.434217976756762, |
| 0.175227946595735, 0.466553967085786, -0.089131608307534, -0.483002021635509, |
| 0.387095214016349, 0.175227946595735, -0.483002021635509, 0.089131608307533, |
| 0.434217976756762, -0.326790388032145, -0.255357107325377, 0.466553967085785, |
| 0.434217976756762, -0.089131608307533, -0.326790388032145, 0.483002021635509, |
| -0.255357107325376, -0.175227946595735, 0.466553967085785, -0.387095214016348, |
| 0.466553967085785, -0.326790388032145, 0.089131608307533, 0.175227946595735, |
| -0.387095214016348, 0.483002021635509, -0.434217976756762, 0.255357107325376, |
| 0.483002021635509, -0.466553967085785, 0.434217976756762, -0.387095214016348, |
| 0.326790388032145, -0.255357107325375, 0.175227946595736, -0.089131608307532 |
| }; |
| |
| static const int16_t idct_i4[16] = { |
| 8192, 10703, 8192, 4433, |
| 8192, 4433, -8192, -10703, |
| 8192, -4433, -8192, 10703, |
| 8192, -10703, 8192, -4433 |
| }; |
| |
| static const int16_t iadst_i4[16] = { |
| 3736, 9459, 10757, 7021, |
| 7021, 9459, -3736, -10757, |
| 9459, 0, -9459, 9459, |
| 10757, -9459, 7021, -3736 |
| }; |
| |
| static const int16_t idct_i8[64] = { |
| 5793, 8035, 7568, 6811, |
| 5793, 4551, 3135, 1598, |
| 5793, 6811, 3135, -1598, |
| -5793, -8035, -7568, -4551, |
| 5793, 4551, -3135, -8035, |
| -5793, 1598, 7568, 6811, |
| 5793, 1598, -7568, -4551, |
| 5793, 6811, -3135, -8035, |
| 5793, -1598, -7568, 4551, |
| 5793, -6811, -3135, 8035, |
| 5793, -4551, -3135, 8035, |
| -5793, -1598, 7568, -6811, |
| 5793, -6811, 3135, 1598, |
| -5793, 8035, -7568, 4551, |
| 5793, -8035, 7568, -6811, |
| 5793, -4551, 3135, -1598 |
| }; |
| |
| static const int16_t iadst_i8[64] = { |
| 1460, 4184, 6342, 7644, |
| 7914, 7114, 5354, 2871, |
| 2871, 7114, 7644, 4184, |
| -1460, -6342, -7914, -5354, |
| 4184, 7914, 2871, -5354, |
| -7644, -1460, 6342, 7114, |
| 5354, 6342, -4184, -7114, |
| 2871, 7644, -1460, -7914, |
| 6342, 2871, -7914, 1460, |
| 7114, -5354, -4184, 7644, |
| 7114, -1460, -5354, 7914, |
| -4184, -2871, 7644, -6342, |
| 7644, -5354, 1460, 2871, |
| -6342, 7914, -7114, 4184, |
| 7914, -7644, 7114, -6342, |
| 5354, -4184, 2871, -1460 |
| }; |
| |
| static float idct_16[256] = { |
| 0.250000, 0.351851, 0.346760, 0.338330, 0.326641, 0.311806, 0.293969, 0.273300, |
| 0.250000, 0.224292, 0.196424, 0.166664, 0.135299, 0.102631, 0.068975, 0.034654, |
| 0.250000, 0.338330, 0.293969, 0.224292, 0.135299, 0.034654, -0.068975, -0.166664, |
| -0.250000, -0.311806, -0.346760, -0.351851, -0.326641, -0.273300, -0.196424, -0.102631, |
| 0.250000, 0.311806, 0.196424, 0.034654, -0.135299, -0.273300, -0.346760, -0.338330, |
| -0.250000, -0.102631, 0.068975, 0.224292, 0.326641, 0.351851, 0.293969, 0.166664, |
| 0.250000, 0.273300, 0.068975, -0.166664, -0.326641, -0.338330, -0.196424, 0.034654, |
| 0.250000, 0.351851, 0.293969, 0.102631, -0.135299, -0.311806, -0.346760, -0.224292, |
| 0.250000, 0.224292, -0.068975, -0.311806, -0.326641, -0.102631, 0.196424, 0.351851, |
| 0.250000, -0.034654, -0.293969, -0.338330, -0.135299, 0.166664, 0.346760, 0.273300, |
| 0.250000, 0.166664, -0.196424, -0.351851, -0.135299, 0.224292, 0.346760, 0.102631, |
| -0.250000, -0.338330, -0.068975, 0.273300, 0.326641, 0.034654, -0.293969, -0.311806, |
| 0.250000, 0.102631, -0.293969, -0.273300, 0.135299, 0.351851, 0.068975, -0.311806, |
| -0.250000, 0.166664, 0.346760, 0.034654, -0.326641, -0.224292, 0.196424, 0.338330, |
| 0.250000, 0.034654, -0.346760, -0.102631, 0.326641, 0.166664, -0.293969, -0.224292, |
| 0.250000, 0.273300, -0.196424, -0.311806, 0.135299, 0.338330, -0.068975, -0.351851, |
| 0.250000, -0.034654, -0.346760, 0.102631, 0.326641, -0.166664, -0.293969, 0.224292, |
| 0.250000, -0.273300, -0.196424, 0.311806, 0.135299, -0.338330, -0.068975, 0.351851, |
| 0.250000, -0.102631, -0.293969, 0.273300, 0.135299, -0.351851, 0.068975, 0.311806, |
| -0.250000, -0.166664, 0.346760, -0.034654, -0.326641, 0.224292, 0.196424, -0.338330, |
| 0.250000, -0.166664, -0.196424, 0.351851, -0.135299, -0.224292, 0.346760, -0.102631, |
| -0.250000, 0.338330, -0.068975, -0.273300, 0.326641, -0.034654, -0.293969, 0.311806, |
| 0.250000, -0.224292, -0.068975, 0.311806, -0.326641, 0.102631, 0.196424, -0.351851, |
| 0.250000, 0.034654, -0.293969, 0.338330, -0.135299, -0.166664, 0.346760, -0.273300, |
| 0.250000, -0.273300, 0.068975, 0.166664, -0.326641, 0.338330, -0.196424, -0.034654, |
| 0.250000, -0.351851, 0.293969, -0.102631, -0.135299, 0.311806, -0.346760, 0.224292, |
| 0.250000, -0.311806, 0.196424, -0.034654, -0.135299, 0.273300, -0.346760, 0.338330, |
| -0.250000, 0.102631, 0.068975, -0.224292, 0.326641, -0.351851, 0.293969, -0.166664, |
| 0.250000, -0.338330, 0.293969, -0.224292, 0.135299, -0.034654, -0.068975, 0.166664, |
| -0.250000, 0.311806, -0.346760, 0.351851, -0.326641, 0.273300, -0.196424, 0.102631, |
| 0.250000, -0.351851, 0.346760, -0.338330, 0.326641, -0.311806, 0.293969, -0.273300, |
| 0.250000, -0.224292, 0.196424, -0.166664, 0.135299, -0.102631, 0.068975, -0.034654 |
| }; |
| |
| static float iadst_16[256] = { |
| 0.033094, 0.098087, 0.159534, 0.215215, 0.263118, 0.301511, 0.329007, 0.344612, |
| 0.347761, 0.338341, 0.316693, 0.283599, 0.240255, 0.188227, 0.129396, 0.065889, |
| 0.065889, 0.188227, 0.283599, 0.338341, 0.344612, 0.301511, 0.215215, 0.098087, |
| -0.033094, -0.159534, -0.263118, -0.329007, -0.347761, -0.316693, -0.240255, -0.129396, |
| 0.098087, 0.263118, 0.344612, 0.316693, 0.188227, 0.000000, -0.188227, -0.316693, |
| -0.344612, -0.263118, -0.098087, 0.098087, 0.263118, 0.344612, 0.316693, 0.188227, |
| 0.129396, 0.316693, 0.329007, 0.159534, -0.098087, -0.301511, -0.338341, -0.188227, |
| 0.065889, 0.283599, 0.344612, 0.215215, -0.033094, -0.263118, -0.347761, -0.240255, |
| 0.159534, 0.344612, 0.240255, -0.065889, -0.316693, -0.301511, -0.033094, 0.263118, |
| 0.338341, 0.129396, -0.188227, -0.347761, -0.215215, 0.098087, 0.329007, 0.283599, |
| 0.188227, 0.344612, 0.098087, -0.263118, -0.316693, -0.000000, 0.316693, 0.263118, |
| -0.098087, -0.344612, -0.188227, 0.188227, 0.344612, 0.098087, -0.263118, -0.316693, |
| 0.215215, 0.316693, -0.065889, -0.347761, -0.098087, 0.301511, 0.240255, -0.188227, |
| -0.329007, 0.033094, 0.344612, 0.129396, -0.283599, -0.263118, 0.159534, 0.338341, |
| 0.240255, 0.263118, -0.215215, -0.283599, 0.188227, 0.301511, -0.159534, -0.316693, |
| 0.129396, 0.329007, -0.098087, -0.338341, 0.065889, 0.344612, -0.033094, -0.347761, |
| 0.263118, 0.188227, -0.316693, -0.098087, 0.344612, 0.000000, -0.344612, 0.098087, |
| 0.316693, -0.188227, -0.263118, 0.263118, 0.188227, -0.316693, -0.098087, 0.344612, |
| 0.283599, 0.098087, -0.347761, 0.129396, 0.263118, -0.301511, -0.065889, 0.344612, |
| -0.159534, -0.240255, 0.316693, 0.033094, -0.338341, 0.188227, 0.215215, -0.329007, |
| 0.301511, 0.000000, -0.301511, 0.301511, 0.000000, -0.301511, 0.301511, 0.000000, |
| -0.301511, 0.301511, 0.000000, -0.301511, 0.301511, 0.000000, -0.301511, 0.301511, |
| 0.316693, -0.098087, -0.188227, 0.344612, -0.263118, -0.000000, 0.263118, -0.344612, |
| 0.188227, 0.098087, -0.316693, 0.316693, -0.098087, -0.188227, 0.344612, -0.263118, |
| 0.329007, -0.188227, -0.033094, 0.240255, -0.344612, 0.301511, -0.129396, -0.098087, |
| 0.283599, -0.347761, 0.263118, -0.065889, -0.159534, 0.316693, -0.338341, 0.215215, |
| 0.338341, -0.263118, 0.129396, 0.033094, -0.188227, 0.301511, -0.347761, 0.316693, |
| -0.215215, 0.065889, 0.098087, -0.240255, 0.329007, -0.344612, 0.283599, -0.159534, |
| 0.344612, -0.316693, 0.263118, -0.188227, 0.098087, 0.000000, -0.098087, 0.188227, |
| -0.263118, 0.316693, -0.344612, 0.344612, -0.316693, 0.263118, -0.188227, 0.098087, |
| 0.347761, -0.344612, 0.338341, -0.329007, 0.316693, -0.301511, 0.283599, -0.263118, |
| 0.240255, -0.215215, 0.188227, -0.159534, 0.129396, -0.098087, 0.065889, -0.033094 |
| }; |
| |
| static const int16_t idct_i16[256] = { |
| 4096, 5765, 5681, 5543, 5352, 5109, 4816, 4478, |
| 4096, 3675, 3218, 2731, 2217, 1682, 1130, 568, |
| 4096, 5543, 4816, 3675, 2217, 568, -1130, -2731, |
| -4096, -5109, -5681, -5765, -5352, -4478, -3218, -1682, |
| 4096, 5109, 3218, 568, -2217, -4478, -5681, -5543, |
| -4096, -1682, 1130, 3675, 5352, 5765, 4816, 2731, |
| 4096, 4478, 1130, -2731, -5352, -5543, -3218, 568, |
| 4096, 5765, 4816, 1682, -2217, -5109, -5681, -3675, |
| 4096, 3675, -1130, -5109, -5352, -1682, 3218, 5765, |
| 4096, -568, -4816, -5543, -2217, 2731, 5681, 4478, |
| 4096, 2731, -3218, -5765, -2217, 3675, 5681, 1682, |
| -4096, -5543, -1130, 4478, 5352, 568, -4816, -5109, |
| 4096, 1682, -4816, -4478, 2217, 5765, 1130, -5109, |
| -4096, 2731, 5681, 568, -5352, -3675, 3218, 5543, |
| 4096, 568, -5681, -1682, 5352, 2731, -4816, -3675, |
| 4096, 4478, -3218, -5109, 2217, 5543, -1130, -5765, |
| 4096, -568, -5681, 1682, 5352, -2731, -4816, 3675, |
| 4096, -4478, -3218, 5109, 2217, -5543, -1130, 5765, |
| 4096, -1682, -4816, 4478, 2217, -5765, 1130, 5109, |
| -4096, -2731, 5681, -568, -5352, 3675, 3218, -5543, |
| 4096, -2731, -3218, 5765, -2217, -3675, 5681, -1682, |
| -4096, 5543, -1130, -4478, 5352, -568, -4816, 5109, |
| 4096, -3675, -1130, 5109, -5352, 1682, 3218, -5765, |
| 4096, 568, -4816, 5543, -2217, -2731, 5681, -4478, |
| 4096, -4478, 1130, 2731, -5352, 5543, -3218, -568, |
| 4096, -5765, 4816, -1682, -2217, 5109, -5681, 3675, |
| 4096, -5109, 3218, -568, -2217, 4478, -5681, 5543, |
| -4096, 1682, 1130, -3675, 5352, -5765, 4816, -2731, |
| 4096, -5543, 4816, -3675, 2217, -568, -1130, 2731, |
| -4096, 5109, -5681, 5765, -5352, 4478, -3218, 1682, |
| 4096, -5765, 5681, -5543, 5352, -5109, 4816, -4478, |
| 4096, -3675, 3218, -2731, 2217, -1682, 1130, -568 |
| }; |
| |
| static const int16_t iadst_i16[256] = { |
| 542, 1607, 2614, 3526, 4311, 4940, 5390, 5646, |
| 5698, 5543, 5189, 4646, 3936, 3084, 2120, 1080, |
| 1080, 3084, 4646, 5543, 5646, 4940, 3526, 1607, |
| -542, -2614, -4311, -5390, -5698, -5189, -3936, -2120, |
| 1607, 4311, 5646, 5189, 3084, 0, -3084, -5189, |
| -5646, -4311, -1607, 1607, 4311, 5646, 5189, 3084, |
| 2120, 5189, 5390, 2614, -1607, -4940, -5543, -3084, |
| 1080, 4646, 5646, 3526, -542, -4311, -5698, -3936, |
| 2614, 5646, 3936, -1080, -5189, -4940, -542, 4311, |
| 5543, 2120, -3084, -5698, -3526, 1607, 5390, 4646, |
| 3084, 5646, 1607, -4311, -5189, 0, 5189, 4311, |
| -1607, -5646, -3084, 3084, 5646, 1607, -4311, -5189, |
| 3526, 5189, -1080, -5698, -1607, 4940, 3936, -3084, |
| -5390, 542, 5646, 2120, -4646, -4311, 2614, 5543, |
| 3936, 4311, -3526, -4646, 3084, 4940, -2614, -5189, |
| 2120, 5390, -1607, -5543, 1080, 5646, -542, -5698, |
| 4311, 3084, -5189, -1607, 5646, 0, -5646, 1607, |
| 5189, -3084, -4311, 4311, 3084, -5189, -1607, 5646, |
| 4646, 1607, -5698, 2120, 4311, -4940, -1080, 5646, |
| -2614, -3936, 5189, 542, -5543, 3084, 3526, -5390, |
| 4940, 0, -4940, 4940, 0, -4940, 4940, 0, |
| -4940, 4940, 0, -4940, 4940, 0, -4940, 4940, |
| 5189, -1607, -3084, 5646, -4311, 0, 4311, -5646, |
| 3084, 1607, -5189, 5189, -1607, -3084, 5646, -4311, |
| 5390, -3084, -542, 3936, -5646, 4940, -2120, -1607, |
| 4646, -5698, 4311, -1080, -2614, 5189, -5543, 3526, |
| 5543, -4311, 2120, 542, -3084, 4940, -5698, 5189, |
| -3526, 1080, 1607, -3936, 5390, -5646, 4646, -2614, |
| 5646, -5189, 4311, -3084, 1607, 0, -1607, 3084, |
| -4311, 5189, -5646, 5646, -5189, 4311, -3084, 1607, |
| 5698, -5646, 5543, -5390, 5189, -4940, 4646, -4311, |
| 3936, -3526, 3084, -2614, 2120, -1607, 1080, -542 |
| }; |
| |
| void vp9_ihtllm_float_c(const int16_t *input, int16_t *output, int pitch, |
| TX_TYPE tx_type, int tx_dim) { |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| int i, j, k; |
| float bufa[256], bufb[256]; // buffers are for floating-point test purpose |
| // the implementation could be simplified in |
| // conjunction with integer transform |
| const int16_t *ip = input; |
| int16_t *op = output; |
| int shortpitch = pitch >> 1; |
| |
| float *pfa = &bufa[0]; |
| float *pfb = &bufb[0]; |
| |
| // pointers to vertical and horizontal transforms |
| const float *ptv, *pth; |
| |
| assert(tx_type != DCT_DCT); |
| // load and convert residual array into floating-point |
| for(j = 0; j < tx_dim; j++) { |
| for(i = 0; i < tx_dim; i++) { |
| pfa[i] = (float)ip[i]; |
| } |
| pfa += tx_dim; |
| ip += tx_dim; |
| } |
| |
| // vertical transformation |
| pfa = &bufa[0]; |
| pfb = &bufb[0]; |
| |
| switch(tx_type) { |
| case ADST_ADST : |
| case ADST_DCT : |
| ptv = (tx_dim == 4) ? &iadst_4[0] : |
| ((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]); |
| break; |
| |
| default : |
| ptv = (tx_dim == 4) ? &idct_4[0] : |
| ((tx_dim == 8) ? &idct_8[0] : &idct_16[0]); |
| break; |
| } |
| |
| for(j = 0; j < tx_dim; j++) { |
| for(i = 0; i < tx_dim; i++) { |
| pfb[i] = 0 ; |
| for(k = 0; k < tx_dim; k++) { |
| pfb[i] += ptv[k] * pfa[(k * tx_dim)]; |
| } |
| pfa += 1; |
| } |
| |
| pfb += tx_dim; |
| ptv += tx_dim; |
| pfa = &bufa[0]; |
| } |
| |
| // horizontal transformation |
| pfa = &bufa[0]; |
| pfb = &bufb[0]; |
| |
| switch(tx_type) { |
| case ADST_ADST : |
| case DCT_ADST : |
| pth = (tx_dim == 4) ? &iadst_4[0] : |
| ((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]); |
| break; |
| |
| default : |
| pth = (tx_dim == 4) ? &idct_4[0] : |
| ((tx_dim == 8) ? &idct_8[0] : &idct_16[0]); |
| break; |
| } |
| |
| for(j = 0; j < tx_dim; j++) { |
| for(i = 0; i < tx_dim; i++) { |
| pfa[i] = 0; |
| for(k = 0; k < tx_dim; k++) { |
| pfa[i] += pfb[k] * pth[k]; |
| } |
| pth += tx_dim; |
| } |
| |
| pfa += tx_dim; |
| pfb += tx_dim; |
| |
| switch(tx_type) { |
| case ADST_ADST : |
| case DCT_ADST : |
| pth = (tx_dim == 4) ? &iadst_4[0] : |
| ((tx_dim == 8) ? &iadst_8[0] : &iadst_16[0]); |
| break; |
| |
| default : |
| pth = (tx_dim == 4) ? &idct_4[0] : |
| ((tx_dim == 8) ? &idct_8[0] : &idct_16[0]); |
| break; |
| } |
| } |
| |
| // convert to short integer format and load BLOCKD buffer |
| op = output; |
| pfa = &bufa[0]; |
| |
| for(j = 0; j < tx_dim; j++) { |
| for(i = 0; i < tx_dim; i++) { |
| op[i] = (pfa[i] > 0 ) ? (int16_t)( pfa[i] / 8 + 0.49) : |
| -(int16_t)( - pfa[i] / 8 + 0.49); |
| } |
| |
| op += shortpitch; |
| pfa += tx_dim; |
| } |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| /* Converted the transforms to integer form. */ |
| #define VERTICAL_SHIFT 14 // 16 |
| #define VERTICAL_ROUNDING ((1 << (VERTICAL_SHIFT - 1)) - 1) |
| #define HORIZONTAL_SHIFT 17 // 15 |
| #define HORIZONTAL_ROUNDING ((1 << (HORIZONTAL_SHIFT - 1)) - 1) |
| void vp9_ihtllm_c(const int16_t *input, int16_t *output, int pitch, |
| TX_TYPE tx_type, int tx_dim) { |
| int i, j, k; |
| int16_t imbuf[256]; |
| |
| const int16_t *ip = input; |
| int16_t *op = output; |
| int16_t *im = &imbuf[0]; |
| |
| /* pointers to vertical and horizontal transforms. */ |
| const int16_t *ptv = NULL, *pth = NULL; |
| int shortpitch = pitch >> 1; |
| |
| switch (tx_type) { |
| case ADST_ADST : |
| ptv = pth = (tx_dim == 4) ? &iadst_i4[0] |
| : ((tx_dim == 8) ? &iadst_i8[0] |
| : &iadst_i16[0]); |
| break; |
| case ADST_DCT : |
| ptv = (tx_dim == 4) ? &iadst_i4[0] |
| : ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]); |
| pth = (tx_dim == 4) ? &idct_i4[0] |
| : ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]); |
| break; |
| case DCT_ADST : |
| ptv = (tx_dim == 4) ? &idct_i4[0] |
| : ((tx_dim == 8) ? &idct_i8[0] : &idct_i16[0]); |
| pth = (tx_dim == 4) ? &iadst_i4[0] |
| : ((tx_dim == 8) ? &iadst_i8[0] : &iadst_i16[0]); |
| break; |
| case DCT_DCT : |
| ptv = pth = (tx_dim == 4) ? &idct_i4[0] |
| : ((tx_dim == 8) ? &idct_i8[0] |
| : &idct_i16[0]); |
| break; |
| default: |
| assert(0); |
| break; |
| } |
| |
| /* vertical transformation */ |
| for (j = 0; j < tx_dim; j++) { |
| for (i = 0; i < tx_dim; i++) { |
| int temp = 0; |
| |
| for (k = 0; k < tx_dim; k++) { |
| temp += ptv[k] * ip[(k * tx_dim)]; |
| } |
| |
| im[i] = (int16_t)((temp + VERTICAL_ROUNDING) >> VERTICAL_SHIFT); |
| ip++; |
| } |
| im += tx_dim; // 16 |
| ptv += tx_dim; |
| ip = input; |
| } |
| |
| /* horizontal transformation */ |
| im = &imbuf[0]; |
| |
| for (j = 0; j < tx_dim; j++) { |
| const int16_t *pthc = pth; |
| |
| for (i = 0; i < tx_dim; i++) { |
| int temp = 0; |
| |
| for (k = 0; k < tx_dim; k++) { |
| temp += im[k] * pthc[k]; |
| } |
| |
| op[i] = (int16_t)((temp + HORIZONTAL_ROUNDING) >> HORIZONTAL_SHIFT); |
| pthc += tx_dim; |
| } |
| |
| im += tx_dim; // 16 |
| op += shortpitch; |
| } |
| } |
| |
| void vp9_short_idct4x4llm_c(short *input, short *output, int pitch) { |
| int i; |
| int a1, b1, c1, d1; |
| |
| short *ip = input; |
| short *op = output; |
| int temp1, temp2; |
| int shortpitch = pitch >> 1; |
| |
| for (i = 0; i < 4; i++) { |
| a1 = ip[0] + ip[8]; |
| b1 = ip[0] - ip[8]; |
| |
| temp1 = (ip[4] * sinpi8sqrt2 + rounding) >> 16; |
| temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1 + rounding) >> 16); |
| c1 = temp1 - temp2; |
| |
| temp1 = ip[4] + ((ip[4] * cospi8sqrt2minus1 + rounding) >> 16); |
| temp2 = (ip[12] * sinpi8sqrt2 + rounding) >> 16; |
| d1 = temp1 + temp2; |
| |
| op[shortpitch * 0] = a1 + d1; |
| op[shortpitch * 3] = a1 - d1; |
| |
| op[shortpitch * 1] = b1 + c1; |
| op[shortpitch * 2] = b1 - c1; |
| |
| ip++; |
| op++; |
| } |
| |
| ip = output; |
| op = output; |
| |
| for (i = 0; i < 4; i++) { |
| a1 = ip[0] + ip[2]; |
| b1 = ip[0] - ip[2]; |
| |
| temp1 = (ip[1] * sinpi8sqrt2 + rounding) >> 16; |
| temp2 = ip[3] + ((ip[3] * cospi8sqrt2minus1 + rounding) >> 16); |
| c1 = temp1 - temp2; |
| |
| temp1 = ip[1] + ((ip[1] * cospi8sqrt2minus1 + rounding) >> 16); |
| temp2 = (ip[3] * sinpi8sqrt2 + rounding) >> 16; |
| d1 = temp1 + temp2; |
| |
| op[0] = (a1 + d1 + 16) >> 5; |
| op[3] = (a1 - d1 + 16) >> 5; |
| |
| op[1] = (b1 + c1 + 16) >> 5; |
| op[2] = (b1 - c1 + 16) >> 5; |
| |
| ip += shortpitch; |
| op += shortpitch; |
| } |
| } |
| |
| void vp9_short_idct4x4llm_1_c(short *input, short *output, int pitch) { |
| int i; |
| int a1; |
| short *op = output; |
| int shortpitch = pitch >> 1; |
| a1 = ((input[0] + 16) >> 5); |
| for (i = 0; i < 4; i++) { |
| op[0] = a1; |
| op[1] = a1; |
| op[2] = a1; |
| op[3] = a1; |
| op += shortpitch; |
| } |
| } |
| |
| void vp9_dc_only_idct_add_c(short input_dc, unsigned char *pred_ptr, |
| unsigned char *dst_ptr, int pitch, int stride) { |
| int a1 = ((input_dc + 16) >> 5); |
| int r, c; |
| |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| int a = a1 + pred_ptr[c]; |
| |
| if (a < 0) |
| a = 0; |
| |
| if (a > 255) |
| a = 255; |
| |
| dst_ptr[c] = (unsigned char) a; |
| } |
| |
| dst_ptr += stride; |
| pred_ptr += pitch; |
| } |
| } |
| |
| void vp9_short_inv_walsh4x4_c(short *input, short *output) { |
| int i; |
| int a1, b1, c1, d1; |
| short *ip = input; |
| short *op = output; |
| |
| for (i = 0; i < 4; i++) { |
| a1 = ((ip[0] + ip[3])); |
| b1 = ((ip[1] + ip[2])); |
| c1 = ((ip[1] - ip[2])); |
| d1 = ((ip[0] - ip[3])); |
| |
| op[0] = (a1 + b1 + 1) >> 1; |
| op[1] = (c1 + d1) >> 1; |
| op[2] = (a1 - b1) >> 1; |
| op[3] = (d1 - c1) >> 1; |
| |
| ip += 4; |
| op += 4; |
| } |
| |
| ip = output; |
| op = output; |
| for (i = 0; i < 4; i++) { |
| a1 = ip[0] + ip[12]; |
| b1 = ip[4] + ip[8]; |
| c1 = ip[4] - ip[8]; |
| d1 = ip[0] - ip[12]; |
| op[0] = (a1 + b1 + 1) >> 1; |
| op[4] = (c1 + d1) >> 1; |
| op[8] = (a1 - b1) >> 1; |
| op[12] = (d1 - c1) >> 1; |
| ip++; |
| op++; |
| } |
| } |
| |
| void vp9_short_inv_walsh4x4_1_c(short *in, short *out) { |
| int i; |
| short tmp[4]; |
| short *ip = in; |
| short *op = tmp; |
| |
| op[0] = (ip[0] + 1) >> 1; |
| op[1] = op[2] = op[3] = (ip[0] >> 1); |
| |
| ip = tmp; |
| op = out; |
| for (i = 0; i < 4; i++) { |
| op[0] = (ip[0] + 1) >> 1; |
| op[4] = op[8] = op[12] = (ip[0] >> 1); |
| ip++; |
| op++; |
| } |
| } |
| |
| #if CONFIG_LOSSLESS |
| void vp9_short_inv_walsh4x4_lossless_c(short *input, short *output) { |
| int i; |
| int a1, b1, c1, d1; |
| short *ip = input; |
| short *op = output; |
| |
| for (i = 0; i < 4; i++) { |
| a1 = ((ip[0] + ip[3])) >> Y2_WHT_UPSCALE_FACTOR; |
| b1 = ((ip[1] + ip[2])) >> Y2_WHT_UPSCALE_FACTOR; |
| c1 = ((ip[1] - ip[2])) >> Y2_WHT_UPSCALE_FACTOR; |
| d1 = ((ip[0] - ip[3])) >> Y2_WHT_UPSCALE_FACTOR; |
| |
| op[0] = (a1 + b1 + 1) >> 1; |
| op[1] = (c1 + d1) >> 1; |
| op[2] = (a1 - b1) >> 1; |
| op[3] = (d1 - c1) >> 1; |
| |
| ip += 4; |
| op += 4; |
| } |
| |
| ip = output; |
| op = output; |
| for (i = 0; i < 4; i++) { |
| a1 = ip[0] + ip[12]; |
| b1 = ip[4] + ip[8]; |
| c1 = ip[4] - ip[8]; |
| d1 = ip[0] - ip[12]; |
| |
| |
| op[0] = ((a1 + b1 + 1) >> 1) << Y2_WHT_UPSCALE_FACTOR; |
| op[4] = ((c1 + d1) >> 1) << Y2_WHT_UPSCALE_FACTOR; |
| op[8] = ((a1 - b1) >> 1) << Y2_WHT_UPSCALE_FACTOR; |
| op[12] = ((d1 - c1) >> 1) << Y2_WHT_UPSCALE_FACTOR; |
| |
| ip++; |
| op++; |
| } |
| } |
| |
| void vp9_short_inv_walsh4x4_1_lossless_c(short *in, short *out) { |
| int i; |
| short tmp[4]; |
| short *ip = in; |
| short *op = tmp; |
| |
| op[0] = ((ip[0] >> Y2_WHT_UPSCALE_FACTOR) + 1) >> 1; |
| op[1] = op[2] = op[3] = ((ip[0] >> Y2_WHT_UPSCALE_FACTOR) >> 1); |
| |
| ip = tmp; |
| op = out; |
| for (i = 0; i < 4; i++) { |
| op[0] = ((ip[0] + 1) >> 1) << Y2_WHT_UPSCALE_FACTOR; |
| op[4] = op[8] = op[12] = ((ip[0] >> 1)) << Y2_WHT_UPSCALE_FACTOR; |
| ip++; |
| op++; |
| } |
| } |
| |
| void vp9_short_inv_walsh4x4_x8_c(short *input, short *output, int pitch) { |
| int i; |
| int a1, b1, c1, d1; |
| short *ip = input; |
| short *op = output; |
| int shortpitch = pitch >> 1; |
| |
| for (i = 0; i < 4; i++) { |
| a1 = ((ip[0] + ip[3])) >> WHT_UPSCALE_FACTOR; |
| b1 = ((ip[1] + ip[2])) >> WHT_UPSCALE_FACTOR; |
| c1 = ((ip[1] - ip[2])) >> WHT_UPSCALE_FACTOR; |
| d1 = ((ip[0] - ip[3])) >> WHT_UPSCALE_FACTOR; |
| |
| op[0] = (a1 + b1 + 1) >> 1; |
| op[1] = (c1 + d1) >> 1; |
| op[2] = (a1 - b1) >> 1; |
| op[3] = (d1 - c1) >> 1; |
| |
| ip += 4; |
| op += shortpitch; |
| } |
| |
| ip = output; |
| op = output; |
| for (i = 0; i < 4; i++) { |
| a1 = ip[shortpitch * 0] + ip[shortpitch * 3]; |
| b1 = ip[shortpitch * 1] + ip[shortpitch * 2]; |
| c1 = ip[shortpitch * 1] - ip[shortpitch * 2]; |
| d1 = ip[shortpitch * 0] - ip[shortpitch * 3]; |
| |
| |
| op[shortpitch * 0] = (a1 + b1 + 1) >> 1; |
| op[shortpitch * 1] = (c1 + d1) >> 1; |
| op[shortpitch * 2] = (a1 - b1) >> 1; |
| op[shortpitch * 3] = (d1 - c1) >> 1; |
| |
| ip++; |
| op++; |
| } |
| } |
| |
| void vp9_short_inv_walsh4x4_1_x8_c(short *in, short *out, int pitch) { |
| int i; |
| short tmp[4]; |
| short *ip = in; |
| short *op = tmp; |
| int shortpitch = pitch >> 1; |
| |
| op[0] = ((ip[0] >> WHT_UPSCALE_FACTOR) + 1) >> 1; |
| op[1] = op[2] = op[3] = ((ip[0] >> WHT_UPSCALE_FACTOR) >> 1); |
| |
| |
| ip = tmp; |
| op = out; |
| for (i = 0; i < 4; i++) { |
| op[shortpitch * 0] = (ip[0] + 1) >> 1; |
| op[shortpitch * 1] = op[shortpitch * 2] = op[shortpitch * 3] = ip[0] >> 1; |
| ip++; |
| op++; |
| } |
| } |
| |
| void vp9_dc_only_inv_walsh_add_c(short input_dc, unsigned char *pred_ptr, |
| unsigned char *dst_ptr, |
| int pitch, int stride) { |
| int r, c; |
| short tmp[16]; |
| vp9_short_inv_walsh4x4_1_x8_c(&input_dc, tmp, 4 << 1); |
| |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| int a = tmp[r * 4 + c] + pred_ptr[c]; |
| if (a < 0) |
| a = 0; |
| |
| if (a > 255) |
| a = 255; |
| |
| dst_ptr[c] = (unsigned char) a; |
| } |
| |
| dst_ptr += stride; |
| pred_ptr += pitch; |
| } |
| } |
| #endif |
| |
| void vp9_dc_only_idct_add_8x8_c(short input_dc, |
| unsigned char *pred_ptr, |
| unsigned char *dst_ptr, |
| int pitch, int stride) { |
| int a1 = ((input_dc + 16) >> 5); |
| int r, c, b; |
| unsigned char *orig_pred = pred_ptr; |
| unsigned char *orig_dst = dst_ptr; |
| for (b = 0; b < 4; b++) { |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| int a = a1 + pred_ptr[c]; |
| |
| if (a < 0) |
| a = 0; |
| |
| if (a > 255) |
| a = 255; |
| |
| dst_ptr[c] = (unsigned char) a; |
| } |
| |
| dst_ptr += stride; |
| pred_ptr += pitch; |
| } |
| dst_ptr = orig_dst + (b + 1) % 2 * 4 + (b + 1) / 2 * 4 * stride; |
| pred_ptr = orig_pred + (b + 1) % 2 * 4 + (b + 1) / 2 * 4 * pitch; |
| } |
| } |
| |
| #define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */ |
| #define W2 2676 /* 2048*sqrt(2)*cos(2*pi/16) */ |
| #define W3 2408 /* 2048*sqrt(2)*cos(3*pi/16) */ |
| #define W5 1609 /* 2048*sqrt(2)*cos(5*pi/16) */ |
| #define W6 1108 /* 2048*sqrt(2)*cos(6*pi/16) */ |
| #define W7 565 /* 2048*sqrt(2)*cos(7*pi/16) */ |
| |
| /* row (horizontal) IDCT |
| * |
| * 7 pi 1 dst[k] = sum c[l] * src[l] * cos( -- * |
| * ( k + - ) * l ) l=0 8 2 |
| * |
| * where: c[0] = 128 c[1..7] = 128*sqrt(2) */ |
| |
| static void idctrow(int *blk) { |
| int x0, x1, x2, x3, x4, x5, x6, x7, x8; |
| /* shortcut */ |
| if (!((x1 = blk[4] << 11) | (x2 = blk[6]) | (x3 = blk[2]) | |
| (x4 = blk[1]) | (x5 = blk[7]) | (x6 = blk[5]) | (x7 = blk[3]))) { |
| blk[0] = blk[1] = blk[2] = blk[3] = blk[4] |
| = blk[5] = blk[6] = blk[7] = blk[0] << 3; |
| return; |
| } |
| |
| x0 = (blk[0] << 11) + 128; /* for proper rounding in the fourth stage */ |
| /* first stage */ |
| x8 = W7 * (x4 + x5); |
| x4 = x8 + (W1 - W7) * x4; |
| x5 = x8 - (W1 + W7) * x5; |
| x8 = W3 * (x6 + x7); |
| x6 = x8 - (W3 - W5) * x6; |
| x7 = x8 - (W3 + W5) * x7; |
| |
| /* second stage */ |
| x8 = x0 + x1; |
| x0 -= x1; |
| x1 = W6 * (x3 + x2); |
| x2 = x1 - (W2 + W6) * x2; |
| x3 = x1 + (W2 - W6) * x3; |
| x1 = x4 + x6; |
| x4 -= x6; |
| x6 = x5 + x7; |
| x5 -= x7; |
| |
| /* third stage */ |
| x7 = x8 + x3; |
| x8 -= x3; |
| x3 = x0 + x2; |
| x0 -= x2; |
| x2 = (181 * (x4 + x5) + 128) >> 8; |
| x4 = (181 * (x4 - x5) + 128) >> 8; |
| |
| /* fourth stage */ |
| blk[0] = (x7 + x1) >> 8; |
| blk[1] = (x3 + x2) >> 8; |
| blk[2] = (x0 + x4) >> 8; |
| blk[3] = (x8 + x6) >> 8; |
| blk[4] = (x8 - x6) >> 8; |
| blk[5] = (x0 - x4) >> 8; |
| blk[6] = (x3 - x2) >> 8; |
| blk[7] = (x7 - x1) >> 8; |
| } |
| |
| /* column (vertical) IDCT |
| * |
| * 7 pi 1 dst[8*k] = sum c[l] * src[8*l] * |
| * cos( -- * ( k + - ) * l ) l=0 8 2 |
| * |
| * where: c[0] = 1/1024 c[1..7] = (1/1024)*sqrt(2) */ |
| static void idctcol(int *blk) { |
| int x0, x1, x2, x3, x4, x5, x6, x7, x8; |
| |
| /* shortcut */ |
| if (!((x1 = (blk[8 * 4] << 8)) | (x2 = blk[8 * 6]) | (x3 = blk[8 * 2]) | |
| (x4 = blk[8 * 1]) | (x5 = blk[8 * 7]) | (x6 = blk[8 * 5]) | |
| (x7 = blk[8 * 3]))) { |
| blk[8 * 0] = blk[8 * 1] = blk[8 * 2] = blk[8 * 3] |
| = blk[8 * 4] = blk[8 * 5] = blk[8 * 6] |
| = blk[8 * 7] = ((blk[8 * 0] + 32) >> 6); |
| return; |
| } |
| |
| x0 = (blk[8 * 0] << 8) + 16384; |
| |
| /* first stage */ |
| x8 = W7 * (x4 + x5) + 4; |
| x4 = (x8 + (W1 - W7) * x4) >> 3; |
| x5 = (x8 - (W1 + W7) * x5) >> 3; |
| x8 = W3 * (x6 + x7) + 4; |
| x6 = (x8 - (W3 - W5) * x6) >> 3; |
| x7 = (x8 - (W3 + W5) * x7) >> 3; |
| |
| /* second stage */ |
| x8 = x0 + x1; |
| x0 -= x1; |
| x1 = W6 * (x3 + x2) + 4; |
| x2 = (x1 - (W2 + W6) * x2) >> 3; |
| x3 = (x1 + (W2 - W6) * x3) >> 3; |
| x1 = x4 + x6; |
| x4 -= x6; |
| x6 = x5 + x7; |
| x5 -= x7; |
| |
| /* third stage */ |
| x7 = x8 + x3; |
| x8 -= x3; |
| x3 = x0 + x2; |
| x0 -= x2; |
| x2 = (181 * (x4 + x5) + 128) >> 8; |
| x4 = (181 * (x4 - x5) + 128) >> 8; |
| |
| /* fourth stage */ |
| blk[8 * 0] = (x7 + x1) >> 14; |
| blk[8 * 1] = (x3 + x2) >> 14; |
| blk[8 * 2] = (x0 + x4) >> 14; |
| blk[8 * 3] = (x8 + x6) >> 14; |
| blk[8 * 4] = (x8 - x6) >> 14; |
| blk[8 * 5] = (x0 - x4) >> 14; |
| blk[8 * 6] = (x3 - x2) >> 14; |
| blk[8 * 7] = (x7 - x1) >> 14; |
| } |
| |
| #define TX_DIM 8 |
| void vp9_short_idct8x8_c(short *coefs, short *block, int pitch) { |
| int X[TX_DIM * TX_DIM]; |
| int i, j; |
| int shortpitch = pitch >> 1; |
| |
| for (i = 0; i < TX_DIM; i++) { |
| for (j = 0; j < TX_DIM; j++) { |
| X[i * TX_DIM + j] = (int)(coefs[i * TX_DIM + j] + 1 |
| + (coefs[i * TX_DIM + j] < 0)) >> 2; |
| } |
| } |
| for (i = 0; i < 8; i++) |
| idctrow(X + 8 * i); |
| |
| for (i = 0; i < 8; i++) |
| idctcol(X + i); |
| |
| for (i = 0; i < TX_DIM; i++) { |
| for (j = 0; j < TX_DIM; j++) { |
| block[i * shortpitch + j] = X[i * TX_DIM + j] >> 1; |
| } |
| } |
| } |
| |
| /* Row IDCT when only first 4 coefficients are non-zero. */ |
| static void idctrow10(int *blk) { |
| int x0, x1, x2, x3, x4, x5, x6, x7, x8; |
| |
| /* shortcut */ |
| if (!((x1 = blk[4] << 11) | (x2 = blk[6]) | (x3 = blk[2]) | |
| (x4 = blk[1]) | (x5 = blk[7]) | (x6 = blk[5]) | (x7 = blk[3]))) { |
| blk[0] = blk[1] = blk[2] = blk[3] = blk[4] |
| = blk[5] = blk[6] = blk[7] = blk[0] << 3; |
| return; |
| } |
| |
| x0 = (blk[0] << 11) + 128; /* for proper rounding in the fourth stage */ |
| /* first stage */ |
| x5 = W7 * x4; |
| x4 = W1 * x4; |
| x6 = W3 * x7; |
| x7 = -W5 * x7; |
| |
| /* second stage */ |
| x2 = W6 * x3; |
| x3 = W2 * x3; |
| x1 = x4 + x6; |
| x4 -= x6; |
| x6 = x5 + x7; |
| x5 -= x7; |
| |
| /* third stage */ |
| x7 = x0 + x3; |
| x8 = x0 - x3; |
| x3 = x0 + x2; |
| x0 -= x2; |
| x2 = (181 * (x4 + x5) + 128) >> 8; |
| x4 = (181 * (x4 - x5) + 128) >> 8; |
| |
| /* fourth stage */ |
| blk[0] = (x7 + x1) >> 8; |
| blk[1] = (x3 + x2) >> 8; |
| blk[2] = (x0 + x4) >> 8; |
| blk[3] = (x8 + x6) >> 8; |
| blk[4] = (x8 - x6) >> 8; |
| blk[5] = (x0 - x4) >> 8; |
| blk[6] = (x3 - x2) >> 8; |
| blk[7] = (x7 - x1) >> 8; |
| } |
| |
| /* Column (vertical) IDCT when only first 4 coefficients are non-zero. */ |
| static void idctcol10(int *blk) { |
| int x0, x1, x2, x3, x4, x5, x6, x7, x8; |
| |
| /* shortcut */ |
| if (!((x1 = (blk[8 * 4] << 8)) | (x2 = blk[8 * 6]) | (x3 = blk[8 * 2]) | |
| (x4 = blk[8 * 1]) | (x5 = blk[8 * 7]) | (x6 = blk[8 * 5]) | |
| (x7 = blk[8 * 3]))) { |
| blk[8 * 0] = blk[8 * 1] = blk[8 * 2] = blk[8 * 3] |
| = blk[8 * 4] = blk[8 * 5] = blk[8 * 6] |
| = blk[8 * 7] = ((blk[8 * 0] + 32) >> 6); |
| return; |
| } |
| |
| x0 = (blk[8 * 0] << 8) + 16384; |
| |
| /* first stage */ |
| x5 = (W7 * x4 + 4) >> 3; |
| x4 = (W1 * x4 + 4) >> 3; |
| x6 = (W3 * x7 + 4) >> 3; |
| x7 = (-W5 * x7 + 4) >> 3; |
| |
| /* second stage */ |
| x2 = (W6 * x3 + 4) >> 3; |
| x3 = (W2 * x3 + 4) >> 3; |
| x1 = x4 + x6; |
| x4 -= x6; |
| x6 = x5 + x7; |
| x5 -= x7; |
| |
| /* third stage */ |
| x7 = x0 + x3; |
| x8 = x0 - x3; |
| x3 = x0 + x2; |
| x0 -= x2; |
| x2 = (181 * (x4 + x5) + 128) >> 8; |
| x4 = (181 * (x4 - x5) + 128) >> 8; |
| |
| /* fourth stage */ |
| blk[8 * 0] = (x7 + x1) >> 14; |
| blk[8 * 1] = (x3 + x2) >> 14; |
| blk[8 * 2] = (x0 + x4) >> 14; |
| blk[8 * 3] = (x8 + x6) >> 14; |
| blk[8 * 4] = (x8 - x6) >> 14; |
| blk[8 * 5] = (x0 - x4) >> 14; |
| blk[8 * 6] = (x3 - x2) >> 14; |
| blk[8 * 7] = (x7 - x1) >> 14; |
| } |
| |
| void vp9_short_idct10_8x8_c(short *coefs, short *block, int pitch) { |
| int X[TX_DIM * TX_DIM]; |
| int i, j; |
| int shortpitch = pitch >> 1; |
| |
| for (i = 0; i < TX_DIM; i++) { |
| for (j = 0; j < TX_DIM; j++) { |
| X[i * TX_DIM + j] = (int)(coefs[i * TX_DIM + j] + 1 |
| + (coefs[i * TX_DIM + j] < 0)) >> 2; |
| } |
| } |
| |
| /* Do first 4 row idct only since non-zero dct coefficients are all in |
| * upper-left 4x4 area. */ |
| for (i = 0; i < 4; i++) |
| idctrow10(X + 8 * i); |
| |
| for (i = 0; i < 8; i++) |
| idctcol10(X + i); |
| |
| for (i = 0; i < TX_DIM; i++) { |
| for (j = 0; j < TX_DIM; j++) { |
| block[i * shortpitch + j] = X[i * TX_DIM + j] >> 1; |
| } |
| } |
| } |
| |
| void vp9_short_ihaar2x2_c(short *input, short *output, int pitch) { |
| int i; |
| short *ip = input; // 0,1, 4, 8 |
| short *op = output; |
| for (i = 0; i < 16; i++) { |
| op[i] = 0; |
| } |
| |
| op[0] = (ip[0] + ip[1] + ip[4] + ip[8] + 1) >> 1; |
| op[1] = (ip[0] - ip[1] + ip[4] - ip[8]) >> 1; |
| op[4] = (ip[0] + ip[1] - ip[4] - ip[8]) >> 1; |
| op[8] = (ip[0] - ip[1] - ip[4] + ip[8]) >> 1; |
| } |
| |
| |
| #if 0 |
| // Keep a really bad float version as reference for now. |
| void vp9_short_idct16x16_c(short *input, short *output, int pitch) { |
| |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double x; |
| const int short_pitch = pitch >> 1; |
| int i, j, k, l; |
| for (l = 0; l < 16; ++l) { |
| for (k = 0; k < 16; ++k) { |
| double s = 0; |
| for (i = 0; i < 16; ++i) { |
| for (j = 0; j < 16; ++j) { |
| x=cos(PI*j*(l+0.5)/16.0)*cos(PI*i*(k+0.5)/16.0)*input[i*16+j]/32; |
| if (i != 0) |
| x *= sqrt(2.0); |
| if (j != 0) |
| x *= sqrt(2.0); |
| s += x; |
| } |
| } |
| output[k*short_pitch+l] = (short)round(s); |
| } |
| } |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| #endif |
| |
| #define TEST_INT_16x16_IDCT 1 |
| #if !TEST_INT_16x16_IDCT |
| |
| static void butterfly_16x16_idct_1d(double input[16], double output[16]) { |
| |
| static const double C1 = 0.995184726672197; |
| static const double C2 = 0.98078528040323; |
| static const double C3 = 0.956940335732209; |
| static const double C4 = 0.923879532511287; |
| static const double C5 = 0.881921264348355; |
| static const double C6 = 0.831469612302545; |
| static const double C7 = 0.773010453362737; |
| static const double C8 = 0.707106781186548; |
| static const double C9 = 0.634393284163646; |
| static const double C10 = 0.555570233019602; |
| static const double C11 = 0.471396736825998; |
| static const double C12 = 0.38268343236509; |
| static const double C13 = 0.290284677254462; |
| static const double C14 = 0.195090322016128; |
| static const double C15 = 0.098017140329561; |
| |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double step[16]; |
| double intermediate[16]; |
| double temp1, temp2; |
| |
| |
| // step 1 and 2 |
| step[ 0] = input[0] + input[8]; |
| step[ 1] = input[0] - input[8]; |
| |
| temp1 = input[4]*C12; |
| temp2 = input[12]*C4; |
| |
| temp1 -= temp2; |
| temp1 *= C8; |
| |
| step[ 2] = 2*(temp1); |
| |
| temp1 = input[4]*C4; |
| temp2 = input[12]*C12; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| step[ 3] = 2*(temp1); |
| |
| temp1 = input[2]*C8; |
| temp1 = 2*(temp1); |
| temp2 = input[6] + input[10]; |
| |
| step[ 4] = temp1 + temp2; |
| step[ 5] = temp1 - temp2; |
| |
| temp1 = input[14]*C8; |
| temp1 = 2*(temp1); |
| temp2 = input[6] - input[10]; |
| |
| step[ 6] = temp2 - temp1; |
| step[ 7] = temp2 + temp1; |
| |
| // for odd input |
| temp1 = input[3]*C12; |
| temp2 = input[13]*C4; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| intermediate[ 8] = 2*(temp1); |
| |
| temp1 = input[3]*C4; |
| temp2 = input[13]*C12; |
| temp2 -= temp1; |
| temp2 = (temp2); |
| temp2 *= C8; |
| intermediate[ 9] = 2*(temp2); |
| |
| intermediate[10] = 2*(input[9]*C8); |
| intermediate[11] = input[15] - input[1]; |
| intermediate[12] = input[15] + input[1]; |
| intermediate[13] = 2*((input[7]*C8)); |
| |
| temp1 = input[11]*C12; |
| temp2 = input[5]*C4; |
| temp2 -= temp1; |
| temp2 = (temp2); |
| temp2 *= C8; |
| intermediate[14] = 2*(temp2); |
| |
| temp1 = input[11]*C4; |
| temp2 = input[5]*C12; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| intermediate[15] = 2*(temp1); |
| |
| step[ 8] = intermediate[ 8] + intermediate[14]; |
| step[ 9] = intermediate[ 9] + intermediate[15]; |
| step[10] = intermediate[10] + intermediate[11]; |
| step[11] = intermediate[10] - intermediate[11]; |
| step[12] = intermediate[12] + intermediate[13]; |
| step[13] = intermediate[12] - intermediate[13]; |
| step[14] = intermediate[ 8] - intermediate[14]; |
| step[15] = intermediate[ 9] - intermediate[15]; |
| |
| // step 3 |
| output[0] = step[ 0] + step[ 3]; |
| output[1] = step[ 1] + step[ 2]; |
| output[2] = step[ 1] - step[ 2]; |
| output[3] = step[ 0] - step[ 3]; |
| |
| temp1 = step[ 4]*C14; |
| temp2 = step[ 7]*C2; |
| temp1 -= temp2; |
| output[4] = (temp1); |
| |
| temp1 = step[ 4]*C2; |
| temp2 = step[ 7]*C14; |
| temp1 += temp2; |
| output[7] = (temp1); |
| |
| temp1 = step[ 5]*C10; |
| temp2 = step[ 6]*C6; |
| temp1 -= temp2; |
| output[5] = (temp1); |
| |
| temp1 = step[ 5]*C6; |
| temp2 = step[ 6]*C10; |
| temp1 += temp2; |
| output[6] = (temp1); |
| |
| output[8] = step[ 8] + step[11]; |
| output[9] = step[ 9] + step[10]; |
| output[10] = step[ 9] - step[10]; |
| output[11] = step[ 8] - step[11]; |
| output[12] = step[12] + step[15]; |
| output[13] = step[13] + step[14]; |
| output[14] = step[13] - step[14]; |
| output[15] = step[12] - step[15]; |
| |
| // output 4 |
| step[ 0] = output[0] + output[7]; |
| step[ 1] = output[1] + output[6]; |
| step[ 2] = output[2] + output[5]; |
| step[ 3] = output[3] + output[4]; |
| step[ 4] = output[3] - output[4]; |
| step[ 5] = output[2] - output[5]; |
| step[ 6] = output[1] - output[6]; |
| step[ 7] = output[0] - output[7]; |
| |
| temp1 = output[8]*C7; |
| temp2 = output[15]*C9; |
| temp1 -= temp2; |
| step[ 8] = (temp1); |
| |
| temp1 = output[9]*C11; |
| temp2 = output[14]*C5; |
| temp1 += temp2; |
| step[ 9] = (temp1); |
| |
| temp1 = output[10]*C3; |
| temp2 = output[13]*C13; |
| temp1 -= temp2; |
| step[10] = (temp1); |
| |
| temp1 = output[11]*C15; |
| temp2 = output[12]*C1; |
| temp1 += temp2; |
| step[11] = (temp1); |
| |
| temp1 = output[11]*C1; |
| temp2 = output[12]*C15; |
| temp2 -= temp1; |
| step[12] = (temp2); |
| |
| temp1 = output[10]*C13; |
| temp2 = output[13]*C3; |
| temp1 += temp2; |
| step[13] = (temp1); |
| |
| temp1 = output[9]*C5; |
| temp2 = output[14]*C11; |
| temp2 -= temp1; |
| step[14] = (temp2); |
| |
| temp1 = output[8]*C9; |
| temp2 = output[15]*C7; |
| temp1 += temp2; |
| step[15] = (temp1); |
| |
| // step 5 |
| output[0] = (step[0] + step[15]); |
| output[1] = (step[1] + step[14]); |
| output[2] = (step[2] + step[13]); |
| output[3] = (step[3] + step[12]); |
| output[4] = (step[4] + step[11]); |
| output[5] = (step[5] + step[10]); |
| output[6] = (step[6] + step[ 9]); |
| output[7] = (step[7] + step[ 8]); |
| |
| output[15] = (step[0] - step[15]); |
| output[14] = (step[1] - step[14]); |
| output[13] = (step[2] - step[13]); |
| output[12] = (step[3] - step[12]); |
| output[11] = (step[4] - step[11]); |
| output[10] = (step[5] - step[10]); |
| output[9] = (step[6] - step[ 9]); |
| output[8] = (step[7] - step[ 8]); |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| // Remove once an int version of iDCT is written |
| #if 0 |
| void reference_16x16_idct_1d(double input[16], double output[16]) { |
| |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| const double kPi = 3.141592653589793238462643383279502884; |
| const double kSqrt2 = 1.414213562373095048801688724209698; |
| for (int k = 0; k < 16; k++) { |
| output[k] = 0.0; |
| for (int n = 0; n < 16; n++) { |
| output[k] += input[n]*cos(kPi*(2*k+1)*n/32.0); |
| if (n == 0) |
| output[k] = output[k]/kSqrt2; |
| } |
| } |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| #endif |
| |
| void vp9_short_idct16x16_c(short *input, short *output, int pitch) { |
| |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double out[16*16], out2[16*16]; |
| const int short_pitch = pitch >> 1; |
| int i, j; |
| // First transform rows |
| for (i = 0; i < 16; ++i) { |
| double temp_in[16], temp_out[16]; |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = input[j + i*short_pitch]; |
| butterfly_16x16_idct_1d(temp_in, temp_out); |
| for (j = 0; j < 16; ++j) |
| out[j + i*16] = temp_out[j]; |
| } |
| // Then transform columns |
| for (i = 0; i < 16; ++i) { |
| double temp_in[16], temp_out[16]; |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = out[j*16 + i]; |
| butterfly_16x16_idct_1d(temp_in, temp_out); |
| for (j = 0; j < 16; ++j) |
| out2[j*16 + i] = temp_out[j]; |
| } |
| for (i = 0; i < 16*16; ++i) |
| output[i] = round(out2[i]/128); |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| #else |
| |
| #define INITIAL_SHIFT 2 |
| #define INITIAL_ROUNDING (1 << (INITIAL_SHIFT - 1)) |
| #define RIGHT_SHIFT 14 |
| #define RIGHT_ROUNDING (1 << (RIGHT_SHIFT - 1)) |
| |
| static const int16_t C1 = 16305; |
| static const int16_t C2 = 16069; |
| static const int16_t C3 = 15679; |
| static const int16_t C4 = 15137; |
| static const int16_t C5 = 14449; |
| static const int16_t C6 = 13623; |
| static const int16_t C7 = 12665; |
| static const int16_t C8 = 11585; |
| static const int16_t C9 = 10394; |
| static const int16_t C10 = 9102; |
| static const int16_t C11 = 7723; |
| static const int16_t C12 = 6270; |
| static const int16_t C13 = 4756; |
| static const int16_t C14 = 3196; |
| static const int16_t C15 = 1606; |
| |
| static void butterfly_16x16_idct_1d(int16_t input[16], int16_t output[16], |
| int last_shift_bits) { |
| int16_t step[16]; |
| int intermediate[16]; |
| int temp1, temp2; |
| |
| int step1_shift = RIGHT_SHIFT + INITIAL_SHIFT; |
| int step1_rounding = 1 << (step1_shift - 1); |
| int last_rounding = 0; |
| |
| if (last_shift_bits > 0) |
| last_rounding = 1 << (last_shift_bits - 1); |
| |
| // step 1 and 2 |
| step[ 0] = (input[0] + input[8] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 1] = (input[0] - input[8] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| temp1 = input[4] * C12; |
| temp2 = input[12] * C4; |
| temp1 = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| step[ 2] = (2 * (temp1) + step1_rounding) >> step1_shift; |
| |
| temp1 = input[4] * C4; |
| temp2 = input[12] * C12; |
| temp1 = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| step[ 3] = (2 * (temp1) + step1_rounding) >> step1_shift; |
| |
| temp1 = input[2] * C8; |
| temp1 = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp2 = input[6] + input[10]; |
| step[ 4] = (temp1 + temp2 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 5] = (temp1 - temp2 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| temp1 = input[14] * C8; |
| temp1 = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp2 = input[6] - input[10]; |
| step[ 6] = (temp2 - temp1 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 7] = (temp2 + temp1 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| // for odd input |
| temp1 = input[3] * C12; |
| temp2 = input[13] * C4; |
| temp1 = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| intermediate[ 8] = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = input[3] * C4; |
| temp2 = input[13] * C12; |
| temp2 = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp2 *= C8; |
| intermediate[ 9] = (2 * (temp2) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| intermediate[10] = (2 * (input[9] * C8) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| intermediate[11] = input[15] - input[1]; |
| intermediate[12] = input[15] + input[1]; |
| intermediate[13] = (2 * (input[7] * C8) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = input[11] * C12; |
| temp2 = input[5] * C4; |
| temp2 = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp2 *= C8; |
| intermediate[14] = (2 * (temp2) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = input[11] * C4; |
| temp2 = input[5] * C12; |
| temp1 = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| intermediate[15] = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| step[ 8] = (intermediate[ 8] + intermediate[14] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[ 9] = (intermediate[ 9] + intermediate[15] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[10] = (intermediate[10] + intermediate[11] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[11] = (intermediate[10] - intermediate[11] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[12] = (intermediate[12] + intermediate[13] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[13] = (intermediate[12] - intermediate[13] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[14] = (intermediate[ 8] - intermediate[14] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| step[15] = (intermediate[ 9] - intermediate[15] + INITIAL_ROUNDING) |
| >> INITIAL_SHIFT; |
| |
| // step 3 |
| output[0] = step[ 0] + step[ 3]; |
| output[1] = step[ 1] + step[ 2]; |
| output[2] = step[ 1] - step[ 2]; |
| output[3] = step[ 0] - step[ 3]; |
| |
| temp1 = step[ 4] * C14; |
| temp2 = step[ 7] * C2; |
| output[4] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 4] * C2; |
| temp2 = step[ 7] * C14; |
| output[7] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 5] * C10; |
| temp2 = step[ 6] * C6; |
| output[5] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 5] * C6; |
| temp2 = step[ 6] * C10; |
| output[6] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| output[8] = step[ 8] + step[11]; |
| output[9] = step[ 9] + step[10]; |
| output[10] = step[ 9] - step[10]; |
| output[11] = step[ 8] - step[11]; |
| output[12] = step[12] + step[15]; |
| output[13] = step[13] + step[14]; |
| output[14] = step[13] - step[14]; |
| output[15] = step[12] - step[15]; |
| |
| // output 4 |
| step[ 0] = output[0] + output[7]; |
| step[ 1] = output[1] + output[6]; |
| step[ 2] = output[2] + output[5]; |
| step[ 3] = output[3] + output[4]; |
| step[ 4] = output[3] - output[4]; |
| step[ 5] = output[2] - output[5]; |
| step[ 6] = output[1] - output[6]; |
| step[ 7] = output[0] - output[7]; |
| |
| temp1 = output[8] * C7; |
| temp2 = output[15] * C9; |
| step[ 8] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[9] * C11; |
| temp2 = output[14] * C5; |
| step[ 9] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[10] * C3; |
| temp2 = output[13] * C13; |
| step[10] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[11] * C15; |
| temp2 = output[12] * C1; |
| step[11] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[11] * C1; |
| temp2 = output[12] * C15; |
| step[12] = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[10] * C13; |
| temp2 = output[13] * C3; |
| step[13] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[9] * C5; |
| temp2 = output[14] * C11; |
| step[14] = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[8] * C9; |
| temp2 = output[15] * C7; |
| step[15] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| // step 5 |
| output[0] = (step[0] + step[15] + last_rounding) >> last_shift_bits; |
| output[1] = (step[1] + step[14] + last_rounding) >> last_shift_bits; |
| output[2] = (step[2] + step[13] + last_rounding) >> last_shift_bits; |
| output[3] = (step[3] + step[12] + last_rounding) >> last_shift_bits; |
| output[4] = (step[4] + step[11] + last_rounding) >> last_shift_bits; |
| output[5] = (step[5] + step[10] + last_rounding) >> last_shift_bits; |
| output[6] = (step[6] + step[ 9] + last_rounding) >> last_shift_bits; |
| output[7] = (step[7] + step[ 8] + last_rounding) >> last_shift_bits; |
| |
| output[15] = (step[0] - step[15] + last_rounding) >> last_shift_bits; |
| output[14] = (step[1] - step[14] + last_rounding) >> last_shift_bits; |
| output[13] = (step[2] - step[13] + last_rounding) >> last_shift_bits; |
| output[12] = (step[3] - step[12] + last_rounding) >> last_shift_bits; |
| output[11] = (step[4] - step[11] + last_rounding) >> last_shift_bits; |
| output[10] = (step[5] - step[10] + last_rounding) >> last_shift_bits; |
| output[9] = (step[6] - step[ 9] + last_rounding) >> last_shift_bits; |
| output[8] = (step[7] - step[ 8] + last_rounding) >> last_shift_bits; |
| } |
| |
| void vp9_short_idct16x16_c(int16_t *input, int16_t *output, int pitch) { |
| int16_t out[16 * 16]; |
| int16_t *outptr = &out[0]; |
| const int short_pitch = pitch >> 1; |
| int i, j; |
| int16_t temp_in[16], temp_out[16]; |
| |
| // First transform rows |
| for (i = 0; i < 16; ++i) { |
| butterfly_16x16_idct_1d(input, outptr, 0); |
| input += short_pitch; |
| outptr += 16; |
| } |
| |
| // Then transform columns |
| for (i = 0; i < 16; ++i) { |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = out[j * 16 + i]; |
| butterfly_16x16_idct_1d(temp_in, temp_out, 3); |
| for (j = 0; j < 16; ++j) |
| output[j * 16 + i] = temp_out[j]; |
| } |
| } |
| |
| /* The following function is called when we know the maximum number of non-zero |
| * dct coefficients is less or equal 10. |
| */ |
| static void butterfly_16x16_idct10_1d(int16_t input[16], int16_t output[16], |
| int last_shift_bits) { |
| int16_t step[16] = {0}; |
| int intermediate[16] = {0}; |
| int temp1, temp2; |
| int last_rounding = 0; |
| |
| if (last_shift_bits > 0) |
| last_rounding = 1 << (last_shift_bits - 1); |
| |
| // step 1 and 2 |
| step[ 0] = (input[0] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 1] = (input[0] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| temp1 = (2 * (input[2] * C8) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| step[ 4] = (temp1 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 5] = (temp1 + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| // for odd input |
| temp1 = (input[3] * C12 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| intermediate[ 8] = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = (-input[3] * C4 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| temp1 *= C8; |
| intermediate[ 9] = (2 * (temp1) + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| step[ 8] = (intermediate[ 8] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[ 9] = (intermediate[ 9] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[10] = (-input[1] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[11] = (input[1] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[12] = (input[1] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[13] = (input[1] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[14] = (intermediate[ 8] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| step[15] = (intermediate[ 9] + INITIAL_ROUNDING) >> INITIAL_SHIFT; |
| |
| // step 3 |
| output[0] = step[ 0]; |
| output[1] = step[ 1]; |
| output[2] = step[ 1]; |
| output[3] = step[ 0]; |
| |
| temp1 = step[ 4] * C14; |
| output[4] = (temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 4] * C2; |
| output[7] = (temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 5] * C10; |
| output[5] = (temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = step[ 5] * C6; |
| output[6] = (temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| output[8] = step[ 8] + step[11]; |
| output[9] = step[ 9] + step[10]; |
| output[10] = step[ 9] - step[10]; |
| output[11] = step[ 8] - step[11]; |
| output[12] = step[12] + step[15]; |
| output[13] = step[13] + step[14]; |
| output[14] = step[13] - step[14]; |
| output[15] = step[12] - step[15]; |
| |
| // output 4 |
| step[ 0] = output[0] + output[7]; |
| step[ 1] = output[1] + output[6]; |
| step[ 2] = output[2] + output[5]; |
| step[ 3] = output[3] + output[4]; |
| step[ 4] = output[3] - output[4]; |
| step[ 5] = output[2] - output[5]; |
| step[ 6] = output[1] - output[6]; |
| step[ 7] = output[0] - output[7]; |
| |
| temp1 = output[8] * C7; |
| temp2 = output[15] * C9; |
| step[ 8] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[9] * C11; |
| temp2 = output[14] * C5; |
| step[ 9] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[10] * C3; |
| temp2 = output[13] * C13; |
| step[10] = (temp1 - temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[11] * C15; |
| temp2 = output[12] * C1; |
| step[11] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[11] * C1; |
| temp2 = output[12] * C15; |
| step[12] = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[10] * C13; |
| temp2 = output[13] * C3; |
| step[13] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[9] * C5; |
| temp2 = output[14] * C11; |
| step[14] = (temp2 - temp1 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| temp1 = output[8] * C9; |
| temp2 = output[15] * C7; |
| step[15] = (temp1 + temp2 + RIGHT_ROUNDING) >> RIGHT_SHIFT; |
| |
| // step 5 |
| output[0] = (step[0] + step[15] + last_rounding) >> last_shift_bits; |
| output[1] = (step[1] + step[14] + last_rounding) >> last_shift_bits; |
| output[2] = (step[2] + step[13] + last_rounding) >> last_shift_bits; |
| output[3] = (step[3] + step[12] + last_rounding) >> last_shift_bits; |
| output[4] = (step[4] + step[11] + last_rounding) >> last_shift_bits; |
| output[5] = (step[5] + step[10] + last_rounding) >> last_shift_bits; |
| output[6] = (step[6] + step[ 9] + last_rounding) >> last_shift_bits; |
| output[7] = (step[7] + step[ 8] + last_rounding) >> last_shift_bits; |
| |
| output[15] = (step[0] - step[15] + last_rounding) >> last_shift_bits; |
| output[14] = (step[1] - step[14] + last_rounding) >> last_shift_bits; |
| output[13] = (step[2] - step[13] + last_rounding) >> last_shift_bits; |
| output[12] = (step[3] - step[12] + last_rounding) >> last_shift_bits; |
| output[11] = (step[4] - step[11] + last_rounding) >> last_shift_bits; |
| output[10] = (step[5] - step[10] + last_rounding) >> last_shift_bits; |
| output[9] = (step[6] - step[ 9] + last_rounding) >> last_shift_bits; |
| output[8] = (step[7] - step[ 8] + last_rounding) >> last_shift_bits; |
| } |
| |
| void vp9_short_idct10_16x16_c(int16_t *input, int16_t *output, int pitch) { |
| int16_t out[16 * 16]; |
| int16_t *outptr = &out[0]; |
| const int short_pitch = pitch >> 1; |
| int i, j; |
| int16_t temp_in[16], temp_out[16]; |
| |
| /* First transform rows. Since all non-zero dct coefficients are in |
| * upper-left 4x4 area, we only need to calculate first 4 rows here. |
| */ |
| vpx_memset(out, 0, sizeof(out)); |
| for (i = 0; i < 4; ++i) { |
| butterfly_16x16_idct10_1d(input, outptr, 0); |
| input += short_pitch; |
| outptr += 16; |
| } |
| |
| // Then transform columns |
| for (i = 0; i < 16; ++i) { |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = out[j*16 + i]; |
| butterfly_16x16_idct10_1d(temp_in, temp_out, 3); |
| for (j = 0; j < 16; ++j) |
| output[j*16 + i] = temp_out[j]; |
| } |
| } |
| #undef INITIAL_SHIFT |
| #undef INITIAL_ROUNDING |
| #undef RIGHT_SHIFT |
| #undef RIGHT_ROUNDING |
| #endif |
| |
| #if CONFIG_TX32X32 |
| #if !CONFIG_DWT32X32HYBRID |
| #define DownshiftMultiplyBy2(x) x * 2 |
| #define DownshiftMultiply(x) x |
| static void idct16(double *input, double *output, int stride) { |
| static const double C1 = 0.995184726672197; |
| static const double C2 = 0.98078528040323; |
| static const double C3 = 0.956940335732209; |
| static const double C4 = 0.923879532511287; |
| static const double C5 = 0.881921264348355; |
| static const double C6 = 0.831469612302545; |
| static const double C7 = 0.773010453362737; |
| static const double C8 = 0.707106781186548; |
| static const double C9 = 0.634393284163646; |
| static const double C10 = 0.555570233019602; |
| static const double C11 = 0.471396736825998; |
| static const double C12 = 0.38268343236509; |
| static const double C13 = 0.290284677254462; |
| static const double C14 = 0.195090322016128; |
| static const double C15 = 0.098017140329561; |
| |
| double step[16]; |
| double intermediate[16]; |
| double temp1, temp2; |
| |
| // step 1 and 2 |
| step[ 0] = input[stride*0] + input[stride*8]; |
| step[ 1] = input[stride*0] - input[stride*8]; |
| |
| temp1 = input[stride*4]*C12; |
| temp2 = input[stride*12]*C4; |
| |
| temp1 -= temp2; |
| temp1 = DownshiftMultiply(temp1); |
| temp1 *= C8; |
| |
| step[ 2] = DownshiftMultiplyBy2(temp1); |
| |
| temp1 = input[stride*4]*C4; |
| temp2 = input[stride*12]*C12; |
| temp1 += temp2; |
| temp1 = DownshiftMultiply(temp1); |
| temp1 *= C8; |
| step[ 3] = DownshiftMultiplyBy2(temp1); |
| |
| temp1 = input[stride*2]*C8; |
| temp1 = DownshiftMultiplyBy2(temp1); |
| temp2 = input[stride*6] + input[stride*10]; |
| |
| step[ 4] = temp1 + temp2; |
| step[ 5] = temp1 - temp2; |
| |
| temp1 = input[stride*14]*C8; |
| temp1 = DownshiftMultiplyBy2(temp1); |
| temp2 = input[stride*6] - input[stride*10]; |
| |
| step[ 6] = temp2 - temp1; |
| step[ 7] = temp2 + temp1; |
| |
| // for odd input |
| temp1 = input[stride*3]*C12; |
| temp2 = input[stride*13]*C4; |
| temp1 += temp2; |
| temp1 = DownshiftMultiply(temp1); |
| temp1 *= C8; |
| intermediate[ 8] = DownshiftMultiplyBy2(temp1); |
| |
| temp1 = input[stride*3]*C4; |
| temp2 = input[stride*13]*C12; |
| temp2 -= temp1; |
| temp2 = DownshiftMultiply(temp2); |
| temp2 *= C8; |
| intermediate[ 9] = DownshiftMultiplyBy2(temp2); |
| |
| intermediate[10] = DownshiftMultiplyBy2(input[stride*9]*C8); |
| intermediate[11] = input[stride*15] - input[stride*1]; |
| intermediate[12] = input[stride*15] + input[stride*1]; |
| intermediate[13] = DownshiftMultiplyBy2((input[stride*7]*C8)); |
| |
| temp1 = input[stride*11]*C12; |
| temp2 = input[stride*5]*C4; |
| temp2 -= temp1; |
| temp2 = DownshiftMultiply(temp2); |
| temp2 *= C8; |
| intermediate[14] = DownshiftMultiplyBy2(temp2); |
| |
| temp1 = input[stride*11]*C4; |
| temp2 = input[stride*5]*C12; |
| temp1 += temp2; |
| temp1 = DownshiftMultiply(temp1); |
| temp1 *= C8; |
| intermediate[15] = DownshiftMultiplyBy2(temp1); |
| |
| step[ 8] = intermediate[ 8] + intermediate[14]; |
| step[ 9] = intermediate[ 9] + intermediate[15]; |
| step[10] = intermediate[10] + intermediate[11]; |
| step[11] = intermediate[10] - intermediate[11]; |
| step[12] = intermediate[12] + intermediate[13]; |
| step[13] = intermediate[12] - intermediate[13]; |
| step[14] = intermediate[ 8] - intermediate[14]; |
| step[15] = intermediate[ 9] - intermediate[15]; |
| |
| // step 3 |
| output[stride*0] = step[ 0] + step[ 3]; |
| output[stride*1] = step[ 1] + step[ 2]; |
| output[stride*2] = step[ 1] - step[ 2]; |
| output[stride*3] = step[ 0] - step[ 3]; |
| |
| temp1 = step[ 4]*C14; |
| temp2 = step[ 7]*C2; |
| temp1 -= temp2; |
| output[stride*4] = DownshiftMultiply(temp1); |
| |
| temp1 = step[ 4]*C2; |
| temp2 = step[ 7]*C14; |
| temp1 += temp2; |
| output[stride*7] = DownshiftMultiply(temp1); |
| |
| temp1 = step[ 5]*C10; |
| temp2 = step[ 6]*C6; |
| temp1 -= temp2; |
| output[stride*5] = DownshiftMultiply(temp1); |
| |
| temp1 = step[ 5]*C6; |
| temp2 = step[ 6]*C10; |
| temp1 += temp2; |
| output[stride*6] = DownshiftMultiply(temp1); |
| |
| output[stride*8] = step[ 8] + step[11]; |
| output[stride*9] = step[ 9] + step[10]; |
| output[stride*10] = step[ 9] - step[10]; |
| output[stride*11] = step[ 8] - step[11]; |
| output[stride*12] = step[12] + step[15]; |
| output[stride*13] = step[13] + step[14]; |
| output[stride*14] = step[13] - step[14]; |
| output[stride*15] = step[12] - step[15]; |
| |
| // output 4 |
| step[ 0] = output[stride*0] + output[stride*7]; |
| step[ 1] = output[stride*1] + output[stride*6]; |
| step[ 2] = output[stride*2] + output[stride*5]; |
| step[ 3] = output[stride*3] + output[stride*4]; |
| step[ 4] = output[stride*3] - output[stride*4]; |
| step[ 5] = output[stride*2] - output[stride*5]; |
| step[ 6] = output[stride*1] - output[stride*6]; |
| step[ 7] = output[stride*0] - output[stride*7]; |
| |
| temp1 = output[stride*8]*C7; |
| temp2 = output[stride*15]*C9; |
| temp1 -= temp2; |
| step[ 8] = DownshiftMultiply(temp1); |
| |
| temp1 = output[stride*9]*C11; |
| temp2 = output[stride*14]*C5; |
| temp1 += temp2; |
| step[ 9] = DownshiftMultiply(temp1); |
| |
| temp1 = output[stride*10]*C3; |
| temp2 = output[stride*13]*C13; |
| temp1 -= temp2; |
| step[10] = DownshiftMultiply(temp1); |
| |
| temp1 = output[stride*11]*C15; |
| temp2 = output[stride*12]*C1; |
| temp1 += temp2; |
| step[11] = DownshiftMultiply(temp1); |
| |
| temp1 = output[stride*11]*C1; |
| temp2 = output[stride*12]*C15; |
| temp2 -= temp1; |
| step[12] = DownshiftMultiply(temp2); |
| |
| temp1 = output[stride*10]*C13; |
| temp2 = output[stride*13]*C3; |
| temp1 += temp2; |
| step[13] = DownshiftMultiply(temp1); |
| |
| temp1 = output[stride*9]*C5; |
| temp2 = output[stride*14]*C11; |
| temp2 -= temp1; |
| step[14] = DownshiftMultiply(temp2); |
| |
| temp1 = output[stride*8]*C9; |
| temp2 = output[stride*15]*C7; |
| temp1 += temp2; |
| step[15] = DownshiftMultiply(temp1); |
| |
| // step 5 |
| output[stride*0] = step[0] + step[15]; |
| output[stride*1] = step[1] + step[14]; |
| output[stride*2] = step[2] + step[13]; |
| output[stride*3] = step[3] + step[12]; |
| output[stride*4] = step[4] + step[11]; |
| output[stride*5] = step[5] + step[10]; |
| output[stride*6] = step[6] + step[ 9]; |
| output[stride*7] = step[7] + step[ 8]; |
| |
| output[stride*15] = step[0] - step[15]; |
| output[stride*14] = step[1] - step[14]; |
| output[stride*13] = step[2] - step[13]; |
| output[stride*12] = step[3] - step[12]; |
| output[stride*11] = step[4] - step[11]; |
| output[stride*10] = step[5] - step[10]; |
| output[stride*9] = step[6] - step[ 9]; |
| output[stride*8] = step[7] - step[ 8]; |
| } |
| static void butterfly_32_idct_1d(double *input, double *output, int stride) { |
| static const double C1 = 0.998795456205; // cos(pi * 1 / 64) |
| static const double C3 = 0.989176509965; // cos(pi * 3 / 64) |
| static const double C5 = 0.970031253195; // cos(pi * 5 / 64) |
| static const double C7 = 0.941544065183; // cos(pi * 7 / 64) |
| static const double C9 = 0.903989293123; // cos(pi * 9 / 64) |
| static const double C11 = 0.857728610000; // cos(pi * 11 / 64) |
| static const double C13 = 0.803207531481; // cos(pi * 13 / 64) |
| static const double C15 = 0.740951125355; // cos(pi * 15 / 64) |
| static const double C16 = 0.707106781187; // cos(pi * 16 / 64) |
| static const double C17 = 0.671558954847; // cos(pi * 17 / 64) |
| static const double C19 = 0.595699304492; // cos(pi * 19 / 64) |
| static const double C21 = 0.514102744193; // cos(pi * 21 / 64) |
| static const double C23 = 0.427555093430; // cos(pi * 23 / 64) |
| static const double C25 = 0.336889853392; // cos(pi * 25 / 64) |
| static const double C27 = 0.242980179903; // cos(pi * 27 / 64) |
| static const double C29 = 0.146730474455; // cos(pi * 29 / 64) |
| static const double C31 = 0.049067674327; // cos(pi * 31 / 64) |
| |
| double step1[32]; |
| double step2[32]; |
| |
| step1[ 0] = input[stride*0]; |
| step1[ 1] = input[stride*2]; |
| step1[ 2] = input[stride*4]; |
| step1[ 3] = input[stride*6]; |
| step1[ 4] = input[stride*8]; |
| step1[ 5] = input[stride*10]; |
| step1[ 6] = input[stride*12]; |
| step1[ 7] = input[stride*14]; |
| step1[ 8] = input[stride*16]; |
| step1[ 9] = input[stride*18]; |
| step1[10] = input[stride*20]; |
| step1[11] = input[stride*22]; |
| step1[12] = input[stride*24]; |
| step1[13] = input[stride*26]; |
| step1[14] = input[stride*28]; |
| step1[15] = input[stride*30]; |
| |
| step1[16] = DownshiftMultiplyBy2(input[stride*1]*C16); |
| step1[17] = (input[stride*3] + input[stride*1]); |
| step1[18] = (input[stride*5] + input[stride*3]); |
| step1[19] = (input[stride*7] + input[stride*5]); |
| step1[20] = (input[stride*9] + input[stride*7]); |
| step1[21] = (input[stride*11] + input[stride*9]); |
| step1[22] = (input[stride*13] + input[stride*11]); |
| step1[23] = (input[stride*15] + input[stride*13]); |
| step1[24] = (input[stride*17] + input[stride*15]); |
| step1[25] = (input[stride*19] + input[stride*17]); |
| step1[26] = (input[stride*21] + input[stride*19]); |
| step1[27] = (input[stride*23] + input[stride*21]); |
| step1[28] = (input[stride*25] + input[stride*23]); |
| step1[29] = (input[stride*27] + input[stride*25]); |
| step1[30] = (input[stride*29] + input[stride*27]); |
| step1[31] = (input[stride*31] + input[stride*29]); |
| |
| idct16(step1, step2, 1); |
| idct16(step1 + 16, step2 + 16, 1); |
| |
| step2[16] = DownshiftMultiply(step2[16] / (2*C1)); |
| step2[17] = DownshiftMultiply(step2[17] / (2*C3)); |
| step2[18] = DownshiftMultiply(step2[18] / (2*C5)); |
| step2[19] = DownshiftMultiply(step2[19] / (2*C7)); |
| step2[20] = DownshiftMultiply(step2[20] / (2*C9)); |
| step2[21] = DownshiftMultiply(step2[21] / (2*C11)); |
| step2[22] = DownshiftMultiply(step2[22] / (2*C13)); |
| step2[23] = DownshiftMultiply(step2[23] / (2*C15)); |
| step2[24] = DownshiftMultiply(step2[24] / (2*C17)); |
| step2[25] = DownshiftMultiply(step2[25] / (2*C19)); |
| step2[26] = DownshiftMultiply(step2[26] / (2*C21)); |
| step2[27] = DownshiftMultiply(step2[27] / (2*C23)); |
| step2[28] = DownshiftMultiply(step2[28] / (2*C25)); |
| step2[29] = DownshiftMultiply(step2[29] / (2*C27)); |
| step2[30] = DownshiftMultiply(step2[30] / (2*C29)); |
| step2[31] = DownshiftMultiply(step2[31] / (2*C31)); |
| |
| output[stride* 0] = step2[ 0] + step2[16]; |
| output[stride* 1] = step2[ 1] + step2[17]; |
| output[stride* 2] = step2[ 2] + step2[18]; |
| output[stride* 3] = step2[ 3] + step2[19]; |
| output[stride* 4] = step2[ 4] + step2[20]; |
| output[stride* 5] = step2[ 5] + step2[21]; |
| output[stride* 6] = step2[ 6] + step2[22]; |
| output[stride* 7] = step2[ 7] + step2[23]; |
| output[stride* 8] = step2[ 8] + step2[24]; |
| output[stride* 9] = step2[ 9] + step2[25]; |
| output[stride*10] = step2[10] + step2[26]; |
| output[stride*11] = step2[11] + step2[27]; |
| output[stride*12] = step2[12] + step2[28]; |
| output[stride*13] = step2[13] + step2[29]; |
| output[stride*14] = step2[14] + step2[30]; |
| output[stride*15] = step2[15] + step2[31]; |
| output[stride*16] = step2[15] - step2[(31 - 0)]; |
| output[stride*17] = step2[14] - step2[(31 - 1)]; |
| output[stride*18] = step2[13] - step2[(31 - 2)]; |
| output[stride*19] = step2[12] - step2[(31 - 3)]; |
| output[stride*20] = step2[11] - step2[(31 - 4)]; |
| output[stride*21] = step2[10] - step2[(31 - 5)]; |
| output[stride*22] = step2[ 9] - step2[(31 - 6)]; |
| output[stride*23] = step2[ 8] - step2[(31 - 7)]; |
| output[stride*24] = step2[ 7] - step2[(31 - 8)]; |
| output[stride*25] = step2[ 6] - step2[(31 - 9)]; |
| output[stride*26] = step2[ 5] - step2[(31 - 10)]; |
| output[stride*27] = step2[ 4] - step2[(31 - 11)]; |
| output[stride*28] = step2[ 3] - step2[(31 - 12)]; |
| output[stride*29] = step2[ 2] - step2[(31 - 13)]; |
| output[stride*30] = step2[ 1] - step2[(31 - 14)]; |
| output[stride*31] = step2[ 0] - step2[(31 - 15)]; |
| } |
| |
| void vp9_short_idct32x32_c(short *input, short *output, int pitch) { |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double out[32*32], out2[32*32]; |
| const int short_pitch = pitch >> 1; |
| int i, j; |
| // First transform rows |
| for (i = 0; i < 32; ++i) { |
| double temp_in[32], temp_out[32]; |
| for (j = 0; j < 32; ++j) |
| temp_in[j] = input[j + i*short_pitch]; |
| butterfly_32_idct_1d(temp_in, temp_out, 1); |
| for (j = 0; j < 32; ++j) |
| out[j + i*32] = temp_out[j]; |
| } |
| // Then transform columns |
| for (i = 0; i < 32; ++i) { |
| double temp_in[32], temp_out[32]; |
| for (j = 0; j < 32; ++j) |
| temp_in[j] = out[j*32 + i]; |
| butterfly_32_idct_1d(temp_in, temp_out, 1); |
| for (j = 0; j < 32; ++j) |
| out2[j*32 + i] = temp_out[j]; |
| } |
| for (i = 0; i < 32*32; ++i) |
| output[i] = round(out2[i]/128); |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| #else // CONFIG_DWT32X32HYBRID |
| |
| #define DWT_MAX_LENGTH 32 |
| #define DWT_TYPE 26 // 26/53/97 |
| #define DWT_PRECISION_BITS 2 |
| #define DWT_PRECISION_RND ((1 << DWT_PRECISION_BITS) / 2) |
| |
| #if DWT_TYPE == 53 |
| |
| // Note: block length must be even for this implementation |
| static void synthesis_53_row(int length, short *lowpass, short *highpass, |
| short *x) { |
| short r, *a, *b; |
| int n; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| r = *highpass; |
| while (n--) { |
| *a++ -= (r + (*b) + 1) >> 1; |
| r = *b++; |
| } |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| while (--n) { |
| *x++ = ((r = *a++) + 1) >> 1; |
| *x++ = *b++ + ((r + (*a) + 2) >> 2); |
| } |
| *x++ = ((r = *a) + 1) >> 1; |
| *x++ = *b + ((r + 1) >> 1); |
| } |
| |
| static void synthesis_53_col(int length, short *lowpass, short *highpass, |
| short *x) { |
| short r, *a, *b; |
| int n; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| r = *highpass; |
| while (n--) { |
| *a++ -= (r + (*b) + 1) >> 1; |
| r = *b++; |
| } |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| while (--n) { |
| r = *a++; |
| *x++ = r; |
| *x++ = ((*b++) << 1) + ((r + (*a) + 1) >> 1); |
| } |
| *x++ = *a; |
| *x++ = ((*b) << 1) + *a; |
| } |
| |
| void dyadic_synthesize_53(int levels, int width, int height, short *c, |
| int pitch_c, short *x, int pitch_x) { |
| int th[16], tw[16], lv, i, j, nh, nw, hh = height, hw = width; |
| short buffer[2 * DWT_MAX_LENGTH]; |
| |
| th[0] = hh; |
| tw[0] = hw; |
| for (i = 1; i <= levels; i++) { |
| th[i] = (th[i - 1] + 1) >> 1; |
| tw[i] = (tw[i - 1] + 1) >> 1; |
| } |
| for (lv = levels - 1; lv >= 0; lv--) { |
| nh = th[lv]; |
| nw = tw[lv]; |
| hh = th[lv + 1]; |
| hw = tw[lv + 1]; |
| if ((nh < 2) || (nw < 2)) continue; |
| for (j = 0; j < nw; j++) { |
| for (i = 0; i < nh; i++) |
| buffer[i] = c[i * pitch_c + j]; |
| synthesis_53_col(nh, buffer, buffer + hh, buffer + nh); |
| for (i = 0; i < nh; i++) |
| c[i * pitch_c + j] = buffer[i + nh]; |
| } |
| for (i = 0; i < nh; i++) { |
| memcpy(buffer, &c[i * pitch_c], nw * sizeof(*buffer)); |
| synthesis_53_row(nw, buffer, buffer + hw, &c[i * pitch_c]); |
| } |
| } |
| for (i = 0; i < height; i++) { |
| for (j = 0; j < width; j++) { |
| x[i * pitch_x + j] = c[i * pitch_c + j] >= 0 ? |
| ((c[i * pitch_c + j] + DWT_PRECISION_RND) >> DWT_PRECISION_BITS) : |
| -((-c[i * pitch_c + j] + DWT_PRECISION_RND) >> DWT_PRECISION_BITS); |
| } |
| } |
| } |
| |
| #elif DWT_TYPE == 26 |
| |
| // Note: block length must be even for this implementation |
| static void synthesis_26_row(int length, short *lowpass, short *highpass, |
| short *x) { |
| short r, s, *a, *b; |
| int i, n = length >> 1; |
| |
| if (n >= 4) { |
| a = lowpass; |
| b = highpass; |
| r = *lowpass; |
| while (--n) { |
| *b++ += (r - a[1] + 4) >> 3; |
| r = *a++; |
| } |
| *b += (r - *a + 4) >> 3; |
| } |
| a = lowpass; |
| b = highpass; |
| for (i = length >> 1; i; i--) { |
| s = *b++; |
| r = *a++; |
| *x++ = (r + s + 1) >> 1; |
| *x++ = (r - s + 1) >> 1; |
| } |
| } |
| |
| static void synthesis_26_col(int length, short *lowpass, short *highpass, |
| short *x) { |
| short r, s, *a, *b; |
| int i, n = length >> 1; |
| |
| if (n >= 4) { |
| a = lowpass; |
| b = highpass; |
| r = *lowpass; |
| while (--n) { |
| *b++ += (r - a[1] + 4) >> 3; |
| r = *a++; |
| } |
| *b += (r - *a + 4) >> 3; |
| } |
| a = lowpass; |
| b = highpass; |
| for (i = length >> 1; i; i--) { |
| s = *b++; |
| r = *a++; |
| *x++ = r + s; |
| *x++ = r - s; |
| } |
| } |
| |
| void dyadic_synthesize_26(int levels, int width, int height, short *c, |
| int pitch_c, short *x, int pitch_x) { |
| int th[16], tw[16], lv, i, j, nh, nw, hh = height, hw = width; |
| short buffer[2 * DWT_MAX_LENGTH]; |
| |
| th[0] = hh; |
| tw[0] = hw; |
| for (i = 1; i <= levels; i++) { |
| th[i] = (th[i - 1] + 1) >> 1; |
| tw[i] = (tw[i - 1] + 1) >> 1; |
| } |
| for (lv = levels - 1; lv >= 0; lv--) { |
| nh = th[lv]; |
| nw = tw[lv]; |
| hh = th[lv + 1]; |
| hw = tw[lv + 1]; |
| if ((nh < 2) || (nw < 2)) continue; |
| for (j = 0; j < nw; j++) { |
| for (i = 0; i < nh; i++) |
| buffer[i] = c[i * pitch_c + j]; |
| synthesis_26_col(nh, buffer, buffer + hh, buffer + nh); |
| for (i = 0; i < nh; i++) |
| c[i * pitch_c + j] = buffer[i + nh]; |
| } |
| for (i = 0; i < nh; i++) { |
| memcpy(buffer, &c[i * pitch_c], nw * sizeof(*buffer)); |
| synthesis_26_row(nw, buffer, buffer + hw, &c[i * pitch_c]); |
| } |
| } |
| for (i = 0; i < height; i++) { |
| for (j = 0; j < width; j++) { |
| x[i * pitch_x + j] = c[i * pitch_c + j] >= 0 ? |
| ((c[i * pitch_c + j] + DWT_PRECISION_RND) >> DWT_PRECISION_BITS) : |
| -((-c[i * pitch_c + j] + DWT_PRECISION_RND) >> DWT_PRECISION_BITS); |
| } |
| } |
| } |
| |
| #elif DWT_TYPE == 97 |
| |
| static void synthesis_97(int length, double *lowpass, double *highpass, |
| double *x) { |
| static const double a_predict1 = -1.586134342; |
| static const double a_update1 = -0.05298011854; |
| static const double a_predict2 = 0.8829110762; |
| static const double a_update2 = 0.4435068522; |
| static const double s_low = 1.149604398; |
| static const double s_high = 1/1.149604398; |
| static const double inv_s_low = 1 / s_low; |
| static const double inv_s_high = 1 / s_high; |
| int i; |
| double y[DWT_MAX_LENGTH]; |
| // Undo pack and scale |
| for (i = 0; i < length / 2; i++) { |
| y[i * 2] = lowpass[i] * inv_s_low; |
| y[i * 2 + 1] = highpass[i] * inv_s_high; |
| } |
| memcpy(x, y, sizeof(*y) * length); |
| // Undo update 2 |
| for (i = 2; i < length; i += 2) { |
| x[i] -= a_update2 * (x[i-1] + x[i+1]); |
| } |
| x[0] -= 2 * a_update2 * x[1]; |
| // Undo predict 2 |
| for (i = 1; i < length - 2; i += 2) { |
| x[i] -= a_predict2 * (x[i - 1] + x[i + 1]); |
| } |
| x[length - 1] -= 2 * a_predict2 * x[length - 2]; |
| // Undo update 1 |
| for (i = 2; i < length; i += 2) { |
| x[i] -= a_update1 * (x[i - 1] + x[i + 1]); |
| } |
| x[0] -= 2 * a_update1 * x[1]; |
| // Undo predict 1 |
| for (i = 1; i < length - 2; i += 2) { |
| x[i] -= a_predict1 * (x[i - 1] + x[i + 1]); |
| } |
| x[length - 1] -= 2 * a_predict1 * x[length - 2]; |
| } |
| |
| void dyadic_synthesize_97(int levels, int width, int height, short *c, |
| int pitch_c, short *x, int pitch_x) { |
| int th[16], tw[16], lv, i, j, nh, nw, hh = height, hw = width; |
| double buffer[2 * DWT_MAX_LENGTH]; |
| double y[DWT_MAX_LENGTH * DWT_MAX_LENGTH]; |
| |
| th[0] = hh; |
| tw[0] = hw; |
| for (i = 1; i <= levels; i++) { |
| th[i] = (th[i - 1] + 1) >> 1; |
| tw[i] = (tw[i - 1] + 1) >> 1; |
| } |
| for (lv = levels - 1; lv >= 0; lv--) { |
| nh = th[lv]; |
| nw = tw[lv]; |
| hh = th[lv + 1]; |
| hw = tw[lv + 1]; |
| if ((nh < 2) || (nw < 2)) continue; |
| for (j = 0; j < nw; j++) { |
| for (i = 0; i < nh; i++) |
| buffer[i] = c[i * pitch_c + j]; |
| synthesis_97(nh, buffer, buffer + hh, buffer + nh); |
| for (i = 0; i < nh; i++) |
| y[i * DWT_MAX_LENGTH + j] = buffer[i + nh]; |
| } |
| for (i = 0; i < nh; i++) { |
| memcpy(buffer, &y[i * DWT_MAX_LENGTH], nw * sizeof(*buffer)); |
| synthesis_97(nw, buffer, buffer + hw, &y[i * DWT_MAX_LENGTH]); |
| } |
| } |
| for (i = 0; i < height; i++) |
| for (j = 0; j < width; j++) |
| x[i * pitch_x + j] = round(y[i * DWT_MAX_LENGTH + j] / |
| (1 << DWT_PRECISION_BITS)); |
| } |
| |
| #endif // DWT_TYPE |
| |
| // TODO(debargha): Implement scaling differently so as not to have to use the |
| // floating point 16x16 dct |
| static void butterfly_16x16_idct_1d_f(double input[16], double output[16]) { |
| static const double C1 = 0.995184726672197; |
| static const double C2 = 0.98078528040323; |
| static const double C3 = 0.956940335732209; |
| static const double C4 = 0.923879532511287; |
| static const double C5 = 0.881921264348355; |
| static const double C6 = 0.831469612302545; |
| static const double C7 = 0.773010453362737; |
| static const double C8 = 0.707106781186548; |
| static const double C9 = 0.634393284163646; |
| static const double C10 = 0.555570233019602; |
| static const double C11 = 0.471396736825998; |
| static const double C12 = 0.38268343236509; |
| static const double C13 = 0.290284677254462; |
| static const double C14 = 0.195090322016128; |
| static const double C15 = 0.098017140329561; |
| |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double step[16]; |
| double intermediate[16]; |
| double temp1, temp2; |
| |
| |
| // step 1 and 2 |
| step[ 0] = input[0] + input[8]; |
| step[ 1] = input[0] - input[8]; |
| |
| temp1 = input[4]*C12; |
| temp2 = input[12]*C4; |
| |
| temp1 -= temp2; |
| temp1 *= C8; |
| |
| step[ 2] = 2*(temp1); |
| |
| temp1 = input[4]*C4; |
| temp2 = input[12]*C12; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| step[ 3] = 2*(temp1); |
| |
| temp1 = input[2]*C8; |
| temp1 = 2*(temp1); |
| temp2 = input[6] + input[10]; |
| |
| step[ 4] = temp1 + temp2; |
| step[ 5] = temp1 - temp2; |
| |
| temp1 = input[14]*C8; |
| temp1 = 2*(temp1); |
| temp2 = input[6] - input[10]; |
| |
| step[ 6] = temp2 - temp1; |
| step[ 7] = temp2 + temp1; |
| |
| // for odd input |
| temp1 = input[3]*C12; |
| temp2 = input[13]*C4; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| intermediate[ 8] = 2*(temp1); |
| |
| temp1 = input[3]*C4; |
| temp2 = input[13]*C12; |
| temp2 -= temp1; |
| temp2 = (temp2); |
| temp2 *= C8; |
| intermediate[ 9] = 2*(temp2); |
| |
| intermediate[10] = 2*(input[9]*C8); |
| intermediate[11] = input[15] - input[1]; |
| intermediate[12] = input[15] + input[1]; |
| intermediate[13] = 2*((input[7]*C8)); |
| |
| temp1 = input[11]*C12; |
| temp2 = input[5]*C4; |
| temp2 -= temp1; |
| temp2 = (temp2); |
| temp2 *= C8; |
| intermediate[14] = 2*(temp2); |
| |
| temp1 = input[11]*C4; |
| temp2 = input[5]*C12; |
| temp1 += temp2; |
| temp1 = (temp1); |
| temp1 *= C8; |
| intermediate[15] = 2*(temp1); |
| |
| step[ 8] = intermediate[ 8] + intermediate[14]; |
| step[ 9] = intermediate[ 9] + intermediate[15]; |
| step[10] = intermediate[10] + intermediate[11]; |
| step[11] = intermediate[10] - intermediate[11]; |
| step[12] = intermediate[12] + intermediate[13]; |
| step[13] = intermediate[12] - intermediate[13]; |
| step[14] = intermediate[ 8] - intermediate[14]; |
| step[15] = intermediate[ 9] - intermediate[15]; |
| |
| // step 3 |
| output[0] = step[ 0] + step[ 3]; |
| output[1] = step[ 1] + step[ 2]; |
| output[2] = step[ 1] - step[ 2]; |
| output[3] = step[ 0] - step[ 3]; |
| |
| temp1 = step[ 4]*C14; |
| temp2 = step[ 7]*C2; |
| temp1 -= temp2; |
| output[4] = (temp1); |
| |
| temp1 = step[ 4]*C2; |
| temp2 = step[ 7]*C14; |
| temp1 += temp2; |
| output[7] = (temp1); |
| |
| temp1 = step[ 5]*C10; |
| temp2 = step[ 6]*C6; |
| temp1 -= temp2; |
| output[5] = (temp1); |
| |
| temp1 = step[ 5]*C6; |
| temp2 = step[ 6]*C10; |
| temp1 += temp2; |
| output[6] = (temp1); |
| |
| output[8] = step[ 8] + step[11]; |
| output[9] = step[ 9] + step[10]; |
| output[10] = step[ 9] - step[10]; |
| output[11] = step[ 8] - step[11]; |
| output[12] = step[12] + step[15]; |
| output[13] = step[13] + step[14]; |
| output[14] = step[13] - step[14]; |
| output[15] = step[12] - step[15]; |
| |
| // output 4 |
| step[ 0] = output[0] + output[7]; |
| step[ 1] = output[1] + output[6]; |
| step[ 2] = output[2] + output[5]; |
| step[ 3] = output[3] + output[4]; |
| step[ 4] = output[3] - output[4]; |
| step[ 5] = output[2] - output[5]; |
| step[ 6] = output[1] - output[6]; |
| step[ 7] = output[0] - output[7]; |
| |
| temp1 = output[8]*C7; |
| temp2 = output[15]*C9; |
| temp1 -= temp2; |
| step[ 8] = (temp1); |
| |
| temp1 = output[9]*C11; |
| temp2 = output[14]*C5; |
| temp1 += temp2; |
| step[ 9] = (temp1); |
| |
| temp1 = output[10]*C3; |
| temp2 = output[13]*C13; |
| temp1 -= temp2; |
| step[10] = (temp1); |
| |
| temp1 = output[11]*C15; |
| temp2 = output[12]*C1; |
| temp1 += temp2; |
| step[11] = (temp1); |
| |
| temp1 = output[11]*C1; |
| temp2 = output[12]*C15; |
| temp2 -= temp1; |
| step[12] = (temp2); |
| |
| temp1 = output[10]*C13; |
| temp2 = output[13]*C3; |
| temp1 += temp2; |
| step[13] = (temp1); |
| |
| temp1 = output[9]*C5; |
| temp2 = output[14]*C11; |
| temp2 -= temp1; |
| step[14] = (temp2); |
| |
| temp1 = output[8]*C9; |
| temp2 = output[15]*C7; |
| temp1 += temp2; |
| step[15] = (temp1); |
| |
| // step 5 |
| output[0] = (step[0] + step[15]); |
| output[1] = (step[1] + step[14]); |
| output[2] = (step[2] + step[13]); |
| output[3] = (step[3] + step[12]); |
| output[4] = (step[4] + step[11]); |
| output[5] = (step[5] + step[10]); |
| output[6] = (step[6] + step[ 9]); |
| output[7] = (step[7] + step[ 8]); |
| |
| output[15] = (step[0] - step[15]); |
| output[14] = (step[1] - step[14]); |
| output[13] = (step[2] - step[13]); |
| output[12] = (step[3] - step[12]); |
| output[11] = (step[4] - step[11]); |
| output[10] = (step[5] - step[10]); |
| output[9] = (step[6] - step[ 9]); |
| output[8] = (step[7] - step[ 8]); |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| void vp9_short_idct16x16_c_f(short *input, short *output, int pitch) { |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| { |
| double out[16*16], out2[16*16]; |
| const int short_pitch = pitch >> 1; |
| int i, j; |
| // First transform rows |
| for (i = 0; i < 16; ++i) { |
| double temp_in[16], temp_out[16]; |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = input[j + i*short_pitch]; |
| butterfly_16x16_idct_1d_f(temp_in, temp_out); |
| for (j = 0; j < 16; ++j) |
| out[j + i*16] = temp_out[j]; |
| } |
| // Then transform columns |
| for (i = 0; i < 16; ++i) { |
| double temp_in[16], temp_out[16]; |
| for (j = 0; j < 16; ++j) |
| temp_in[j] = out[j*16 + i]; |
| butterfly_16x16_idct_1d_f(temp_in, temp_out); |
| for (j = 0; j < 16; ++j) |
| out2[j*16 + i] = temp_out[j]; |
| } |
| for (i = 0; i < 16*16; ++i) |
| output[i] = round(out2[i] / (64 >> DWT_PRECISION_BITS)); |
| } |
| vp9_clear_system_state(); // Make it simd safe : __asm emms; |
| } |
| |
| void vp9_short_idct32x32_c(short *input, short *output, int pitch) { |
| // assume out is a 32x32 buffer |
| // Temporary buffer to hold a 16x16 block for 16x16 inverse dct |
| short buffer[16 * 16]; |
| // Temporary buffer to hold a 32x32 block for inverse 32x32 dwt |
| short buffer2[32 * 32]; |
| // Note: pitch is in bytes, short_pitch is in short units |
| const int short_pitch = pitch >> 1; |
| int i; |
| |
| // TODO(debargha): Implement more efficiently by adding output pitch |
| // argument to the idct16x16 function |
| vp9_short_idct16x16_c_f(input, buffer, pitch); |
| for (i = 0; i < 16; ++i) { |
| vpx_memcpy(buffer2 + i * 32, buffer + i * 16, sizeof(*buffer2) * 16); |
| } |
| vp9_short_idct16x16_c_f(input + 16, buffer, pitch); |
| for (i = 0; i < 16; ++i) { |
| vpx_memcpy(buffer2 + i * 32 + 16, buffer + i * 16, sizeof(*buffer2) * 16); |
| } |
| vp9_short_idct16x16_c_f(input + 16 * short_pitch, buffer, pitch); |
| for (i = 0; i < 16; ++i) { |
| vpx_memcpy(buffer2 + i * 32 + 16 * 32, buffer + i * 16, |
| sizeof(*buffer2) * 16); |
| } |
| vp9_short_idct16x16_c_f(input + 16 * short_pitch + 16, buffer, pitch); |
| for (i = 0; i < 16; ++i) { |
| vpx_memcpy(buffer2 + i * 32 + 16 * 33, buffer + i * 16, |
| sizeof(*buffer2) * 16); |
| } |
| #if DWT_TYPE == 26 |
| dyadic_synthesize_26(1, 32, 32, buffer2, 32, output, 32); |
| #elif DWT_TYPE == 97 |
| dyadic_synthesize_97(1, 32, 32, buffer2, 32, output, 32); |
| #elif DWT_TYPE == 53 |
| dyadic_synthesize_53(1, 32, 32, buffer2, 32, output, 32); |
| #endif |
| } |
| #endif // CONFIG_DWT32X32HYBRID |
| #endif // CONFIG_TX32X32 |