| // Copyright 2019 The libgav1 Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "src/dsp/obmc.h" |
| |
| #include <cassert> |
| #include <cstddef> |
| #include <cstdint> |
| |
| #include "src/dsp/dsp.h" |
| #include "src/utils/common.h" |
| #include "src/utils/constants.h" |
| |
| namespace libgav1 { |
| namespace dsp { |
| namespace { |
| |
| #include "src/dsp/obmc.inc" |
| |
| // 7.11.3.10 (from top samples). |
| template <typename Pixel> |
| void OverlapBlendVertical_C(void* LIBGAV1_RESTRICT const prediction, |
| const ptrdiff_t prediction_stride, const int width, |
| const int height, |
| const void* LIBGAV1_RESTRICT const obmc_prediction, |
| const ptrdiff_t obmc_prediction_stride) { |
| auto* pred = static_cast<Pixel*>(prediction); |
| const ptrdiff_t pred_stride = prediction_stride / sizeof(Pixel); |
| const auto* obmc_pred = static_cast<const Pixel*>(obmc_prediction); |
| const ptrdiff_t obmc_pred_stride = obmc_prediction_stride / sizeof(Pixel); |
| const uint8_t* const mask = kObmcMask + height - 2; |
| assert(width >= 4); |
| assert(height >= 2); |
| |
| for (int y = 0; y < height; ++y) { |
| const uint8_t mask_value = mask[y]; |
| for (int x = 0; x < width; ++x) { |
| pred[x] = static_cast<Pixel>(RightShiftWithRounding( |
| mask_value * pred[x] + (64 - mask_value) * obmc_pred[x], 6)); |
| } |
| pred += pred_stride; |
| obmc_pred += obmc_pred_stride; |
| } |
| } |
| |
| // 7.11.3.10 (from left samples). |
| template <typename Pixel> |
| void OverlapBlendHorizontal_C( |
| void* LIBGAV1_RESTRICT const prediction, const ptrdiff_t prediction_stride, |
| const int width, const int height, |
| const void* LIBGAV1_RESTRICT const obmc_prediction, |
| const ptrdiff_t obmc_prediction_stride) { |
| auto* pred = static_cast<Pixel*>(prediction); |
| const ptrdiff_t pred_stride = prediction_stride / sizeof(Pixel); |
| const auto* obmc_pred = static_cast<const Pixel*>(obmc_prediction); |
| const ptrdiff_t obmc_pred_stride = obmc_prediction_stride / sizeof(Pixel); |
| const uint8_t* const mask = kObmcMask + width - 2; |
| assert(width >= 2); |
| assert(height >= 4); |
| |
| for (int y = 0; y < height; ++y) { |
| for (int x = 0; x < width; ++x) { |
| const uint8_t mask_value = mask[x]; |
| pred[x] = static_cast<Pixel>(RightShiftWithRounding( |
| mask_value * pred[x] + (64 - mask_value) * obmc_pred[x], 6)); |
| } |
| pred += pred_stride; |
| obmc_pred += obmc_pred_stride; |
| } |
| } |
| |
| void Init8bpp() { |
| Dsp* const dsp = dsp_internal::GetWritableDspTable(8); |
| assert(dsp != nullptr); |
| #if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint8_t>; |
| dsp->obmc_blend[kObmcDirectionHorizontal] = OverlapBlendHorizontal_C<uint8_t>; |
| #else // !LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| static_cast<void>(dsp); |
| #ifndef LIBGAV1_Dsp8bpp_ObmcVertical |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint8_t>; |
| #endif |
| #ifndef LIBGAV1_Dsp8bpp_ObmcHorizontal |
| dsp->obmc_blend[kObmcDirectionHorizontal] = OverlapBlendHorizontal_C<uint8_t>; |
| #endif |
| #endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| } |
| |
| #if LIBGAV1_MAX_BITDEPTH >= 10 |
| void Init10bpp() { |
| Dsp* const dsp = dsp_internal::GetWritableDspTable(10); |
| assert(dsp != nullptr); |
| #if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint16_t>; |
| dsp->obmc_blend[kObmcDirectionHorizontal] = |
| OverlapBlendHorizontal_C<uint16_t>; |
| #else // !LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| static_cast<void>(dsp); |
| #ifndef LIBGAV1_Dsp10bpp_ObmcVertical |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint16_t>; |
| #endif |
| #ifndef LIBGAV1_Dsp10bpp_ObmcHorizontal |
| dsp->obmc_blend[kObmcDirectionHorizontal] = |
| OverlapBlendHorizontal_C<uint16_t>; |
| #endif |
| #endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| } |
| #endif // LIBGAV1_MAX_BITDEPTH >= 10 |
| |
| #if LIBGAV1_MAX_BITDEPTH == 12 |
| void Init12bpp() { |
| Dsp* const dsp = dsp_internal::GetWritableDspTable(12); |
| assert(dsp != nullptr); |
| #if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint16_t>; |
| dsp->obmc_blend[kObmcDirectionHorizontal] = |
| OverlapBlendHorizontal_C<uint16_t>; |
| #else // !LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| static_cast<void>(dsp); |
| #ifndef LIBGAV1_Dsp12bpp_ObmcVertical |
| dsp->obmc_blend[kObmcDirectionVertical] = OverlapBlendVertical_C<uint16_t>; |
| #endif |
| #ifndef LIBGAV1_Dsp12bpp_ObmcHorizontal |
| dsp->obmc_blend[kObmcDirectionHorizontal] = |
| OverlapBlendHorizontal_C<uint16_t>; |
| #endif |
| #endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS |
| } |
| #endif // LIBGAV1_MAX_BITDEPTH == 12 |
| |
| } // namespace |
| |
| void ObmcInit_C() { |
| Init8bpp(); |
| #if LIBGAV1_MAX_BITDEPTH >= 10 |
| Init10bpp(); |
| #endif |
| #if LIBGAV1_MAX_BITDEPTH == 12 |
| Init12bpp(); |
| #endif |
| } |
| |
| } // namespace dsp |
| } // namespace libgav1 |