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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.
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@ -197,6 +197,60 @@ constexpr std::array<s32, 254> map_lut{
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230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 18, 242, 243, 244, 245, 246, 247,
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230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 18, 242, 243, 244, 245, 246, 247,
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248, 249, 250, 251, 252, 253, 19,
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248, 249, 250, 251, 252, 253, 19,
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};
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};
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// 6.2.14 Tile size calculation
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s32 CalcMinLog2TileCols(s32 frame_width) {
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const s32 sb64_cols = (frame_width + 63) / 64;
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s32 min_log2 = 0;
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while ((64 << min_log2) < sb64_cols) {
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min_log2++;
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}
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return min_log2;
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}
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s32 CalcMaxLog2TileCols(s32 frame_width) {
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const s32 sb64_cols = (frame_width + 63) / 64;
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s32 max_log2 = 1;
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while ((sb64_cols >> max_log2) >= 4) {
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max_log2++;
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}
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return max_log2 - 1;
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}
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// Recenters probability. Based on section 6.3.6 of VP9 Specification
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s32 RecenterNonNeg(s32 new_prob, s32 old_prob) {
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if (new_prob > old_prob * 2) {
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return new_prob;
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}
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if (new_prob >= old_prob) {
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return (new_prob - old_prob) * 2;
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}
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return (old_prob - new_prob) * 2 - 1;
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}
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// Adjusts old_prob depending on new_prob. Based on section 6.3.5 of VP9 Specification
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s32 RemapProbability(s32 new_prob, s32 old_prob) {
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new_prob--;
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old_prob--;
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std::size_t index{};
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if (old_prob * 2 <= 0xff) {
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index = static_cast<std::size_t>(std::max(0, RecenterNonNeg(new_prob, old_prob) - 1));
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} else {
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index = static_cast<std::size_t>(
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std::max(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1));
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}
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return map_lut[index];
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}
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} // Anonymous namespace
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} // Anonymous namespace
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VP9::VP9(GPU& gpu) : gpu(gpu) {}
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VP9::VP9(GPU& gpu) : gpu(gpu) {}
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@ -236,32 +290,6 @@ void VP9::WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_pro
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EncodeTermSubExp(writer, delta);
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EncodeTermSubExp(writer, delta);
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}
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}
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s32 VP9::RemapProbability(s32 new_prob, s32 old_prob) {
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new_prob--;
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old_prob--;
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std::size_t index{};
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if (old_prob * 2 <= 0xff) {
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index = static_cast<std::size_t>(std::max(0, RecenterNonNeg(new_prob, old_prob) - 1));
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} else {
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index = static_cast<std::size_t>(
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std::max(0, RecenterNonNeg(0xff - 1 - new_prob, 0xff - 1 - old_prob) - 1));
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}
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return map_lut[index];
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}
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s32 VP9::RecenterNonNeg(s32 new_prob, s32 old_prob) {
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if (new_prob > old_prob * 2) {
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return new_prob;
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} else if (new_prob >= old_prob) {
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return (new_prob - old_prob) * 2;
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} else {
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return (old_prob - new_prob) * 2 - 1;
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}
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}
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void VP9::EncodeTermSubExp(VpxRangeEncoder& writer, s32 value) {
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void VP9::EncodeTermSubExp(VpxRangeEncoder& writer, s32 value) {
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if (WriteLessThan(writer, value, 16)) {
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if (WriteLessThan(writer, value, 16)) {
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writer.Write(value, 4);
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writer.Write(value, 4);
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@ -361,28 +389,6 @@ void VP9::WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_
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}
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}
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}
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}
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s32 VP9::CalcMinLog2TileCols(s32 frame_width) {
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const s32 sb64_cols = (frame_width + 63) / 64;
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s32 min_log2 = 0;
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while ((64 << min_log2) < sb64_cols) {
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min_log2++;
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}
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return min_log2;
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}
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s32 VP9::CalcMaxLog2TileCols(s32 frameWidth) {
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const s32 sb64_cols = (frameWidth + 63) / 64;
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s32 max_log2 = 1;
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while ((sb64_cols >> max_log2) >= 4) {
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max_log2++;
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}
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return max_log2 - 1;
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}
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Vp9PictureInfo VP9::GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state) {
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Vp9PictureInfo VP9::GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state) {
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PictureInfo picture_info{};
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PictureInfo picture_info{};
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gpu.MemoryManager().ReadBlock(state.picture_info_offset, &picture_info, sizeof(PictureInfo));
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gpu.MemoryManager().ReadBlock(state.picture_info_offset, &picture_info, sizeof(PictureInfo));
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@ -121,12 +121,6 @@ private:
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/// Generates compressed header probability deltas in the bitstream writer
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/// Generates compressed header probability deltas in the bitstream writer
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void WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
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void WriteProbabilityDelta(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
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/// Adjusts old_prob depending on new_prob. Based on section 6.3.5 of VP9 Specification
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s32 RemapProbability(s32 new_prob, s32 old_prob);
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/// Recenters probability. Based on section 6.3.6 of VP9 Specification
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s32 RecenterNonNeg(s32 new_prob, s32 old_prob);
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/// Inverse of 6.3.4 Decode term subexp
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/// Inverse of 6.3.4 Decode term subexp
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void EncodeTermSubExp(VpxRangeEncoder& writer, s32 value);
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void EncodeTermSubExp(VpxRangeEncoder& writer, s32 value);
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@ -146,10 +140,6 @@ private:
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/// Write motion vector probability updates. 6.3.17 in the spec
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/// Write motion vector probability updates. 6.3.17 in the spec
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void WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
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void WriteMvProbabilityUpdate(VpxRangeEncoder& writer, u8 new_prob, u8 old_prob);
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/// 6.2.14 Tile size calculation
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s32 CalcMinLog2TileCols(s32 frame_width);
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s32 CalcMaxLog2TileCols(s32 frame_width);
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/// Returns VP9 information from NVDEC provided offset and size
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/// Returns VP9 information from NVDEC provided offset and size
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Vp9PictureInfo GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state);
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Vp9PictureInfo GetVp9PictureInfo(const NvdecCommon::NvdecRegisters& state);
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