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astc: Make InputBitStream constexpr

This commit is contained in:
ReinUsesLisp 2020-04-09 02:54:05 -03:00
parent 0efc230381
commit d22a689250
1 changed files with 11 additions and 11 deletions
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22
src/video_core/textures/astc.cpp
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@ -39,25 +39,25 @@ constexpr u32 Popcnt(u32 n) {
class InputBitStream { class InputBitStream {
public: public:
explicit InputBitStream(const u8* ptr, std::size_t start_offset = 0) constexpr explicit InputBitStream(const u8* ptr, std::size_t start_offset = 0)
: cur_byte(ptr), next_bit(start_offset % 8) {} : cur_byte{ptr}, next_bit{start_offset % 8} {}
std::size_t GetBitsRead() const { constexpr std::size_t GetBitsRead() const {
return m_BitsRead; return bits_read;
} }
u32 ReadBit() { constexpr bool ReadBit() {
u32 bit = *cur_byte >> next_bit++; const bool bit = (*cur_byte >> next_bit++) & 1;
while (next_bit >= 8) { while (next_bit >= 8) {
next_bit -= 8; next_bit -= 8;
cur_byte++; cur_byte++;
} }
m_BitsRead++; bits_read++;
return bit & 1; return bit;
} }
u32 ReadBits(std::size_t nBits) { constexpr u32 ReadBits(std::size_t nBits) {
u32 ret = 0; u32 ret = 0;
for (std::size_t i = 0; i < nBits; ++i) { for (std::size_t i = 0; i < nBits; ++i) {
ret |= (ReadBit() & 1) << i; ret |= (ReadBit() & 1) << i;
@ -66,7 +66,7 @@ public:
} }
template <std::size_t nBits> template <std::size_t nBits>
u32 ReadBits() { constexpr u32 ReadBits() {
u32 ret = 0; u32 ret = 0;
for (std::size_t i = 0; i < nBits; ++i) { for (std::size_t i = 0; i < nBits; ++i) {
ret |= (ReadBit() & 1) << i; ret |= (ReadBit() & 1) << i;
@ -77,7 +77,7 @@ public:
private: private:
const u8* cur_byte; const u8* cur_byte;
std::size_t next_bit = 0; std::size_t next_bit = 0;
std::size_t m_BitsRead = 0; std::size_t bits_read = 0;
}; };
class OutputBitStream { class OutputBitStream {