diff options
Diffstat (limited to '')
-rw-r--r-- | src/video_core/command_classes/codecs/vp9.cpp | 102 |
1 files changed, 54 insertions, 48 deletions
diff --git a/src/video_core/command_classes/codecs/vp9.cpp b/src/video_core/command_classes/codecs/vp9.cpp index b3e98aa9f..aeb9866de 100644 --- a/src/video_core/command_classes/codecs/vp9.cpp +++ b/src/video_core/command_classes/codecs/vp9.cpp @@ -197,6 +197,60 @@ constexpr std::array<s32, 254> map_lut{ 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 18, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 19, }; + +// 6.2.14 Tile size calculation + +s32 CalcMinLog2TileCols(s32 frame_width) { + const s32 sb64_cols = (frame_width + 63) / 64; + s32 min_log2 = 0; + + while ((64 << min_log2) < sb64_cols) { + min_log2++; + } + + return min_log2; +} + +s32 CalcMaxLog2TileCols(s32 frame_width) { + const s32 sb64_cols = (frame_width + 63) / 64; + s32 max_log2 = 1; + + while ((sb64_cols >> max_log2) >= 4) { + max_log2++; + } + + return max_log2 - 1; +} + +// Recenters probability. Based on section 6.3.6 of VP9 Specification +s32 RecenterNonNeg(s32 new_prob, s32 old_prob) { + if (new_prob > old_prob * 2) { + return new_prob; + } + + if (new_prob >= old_prob) { + return (new_prob - old_prob) * 2; + } + + return (old_prob - new_prob) * 2 - 1; +} + +// Adjusts old_prob depending on new_prob. Based on section 6.3.5 of VP9 Specification +s32 RemapProbability(s32 new_prob, s32 old_prob) { + new_prob--; + old_prob--; + + std::size_t index{}; + + if (old_prob * 2 <= 0xff) { + index = static_cast<std::size_t>(std::max(0, RecenterNonNeg(new_prob, old_prob) - 1)); + } else { + index = static_cast<std::size_t>( + std::max(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1)); + } + + return map_lut[index]; +} } // Anonymous namespace VP9::VP9(GPU& gpu) : gpu(gpu) {} @@ -236,32 +290,6 @@ void VP9::WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_pro EncodeTermSubExp(writer, delta); } -s32 VP9::RemapProbability(s32 new_prob, s32 old_prob) { - new_prob--; - old_prob--; - - std::size_t index{}; - - if (old_prob * 2 <= 0xff) { - index = static_cast<std::size_t>(std::max(0, RecenterNonNeg(new_prob, old_prob) - 1)); - } else { - index = static_cast<std::size_t>( - std::max(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1)); - } - - return map_lut[index]; -} - -s32 VP9::RecenterNonNeg(s32 new_prob, s32 old_prob) { - if (new_prob > old_prob * 2) { - return new_prob; - } else if (new_prob >= old_prob) { - return (new_prob - old_prob) * 2; - } else { - return (old_prob - new_prob) * 2 - 1; - } -} - void VP9::EncodeTermSubExp(VpxRangeEncoder& writer, s32 value) { if (WriteLessThan(writer, value, 16)) { writer.Write(value, 4); @@ -361,28 +389,6 @@ void VP9::WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_ } } -s32 VP9::CalcMinLog2TileCols(s32 frame_width) { - const s32 sb64_cols = (frame_width + 63) / 64; - s32 min_log2 = 0; - - while ((64 << min_log2) < sb64_cols) { - min_log2++; - } - - return min_log2; -} - -s32 VP9::CalcMaxLog2TileCols(s32 frameWidth) { - const s32 sb64_cols = (frameWidth + 63) / 64; - s32 max_log2 = 1; - - while ((sb64_cols >> max_log2) >= 4) { - max_log2++; - } - - return max_log2 - 1; -} - Vp9PictureInfo VP9::GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state) { PictureInfo picture_info{}; gpu.MemoryManager().ReadBlock(state.picture_info_offset, &picture_info, sizeof(PictureInfo)); |