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vp9: Make some member functions internally linked 

These helper functions don't directly modify any member state and can be
hidden from view.
master
Lioncash 2020-10-29 22:34:44 +07:00
parent 7dcf4c0018
commit f8543249f0
2 changed files with 54 additions and 58 deletions
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102
src/video_core/command_classes/codecs/vp9.cpp
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@ -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));

10
src/video_core/command_classes/codecs/vp9.h
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@ -121,12 +121,6 @@ private:
/// Generates compressed header probability deltas in the bitstream writer
void WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
/// Adjusts old_prob depending on new_prob. Based on section 6.3.5 of VP9 Specification
s32 RemapProbability(s32 new_prob, s32 old_prob);
/// Recenters probability. Based on section 6.3.6 of VP9 Specification
s32 RecenterNonNeg(s32 new_prob, s32 old_prob);
/// Inverse of 6.3.4 Decode term subexp
void EncodeTermSubExp(VpxRangeEncoder& writer, s32 value);
@ -146,10 +140,6 @@ private:
/// Write motion vector probability updates. 6.3.17 in the spec
void WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
/// 6.2.14 Tile size calculation
s32 CalcMinLog2TileCols(s32 frame_width);
s32 CalcMaxLog2TileCols(s32 frame_width);
/// Returns VP9 information from NVDEC provided offset and size
Vp9PictureInfo GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state);