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-rw-r--r--src/video_core/textures/astc.cpp80
1 files changed, 48 insertions, 32 deletions
diff --git a/src/video_core/textures/astc.cpp b/src/video_core/textures/astc.cpp
index bc50a4876..b508d64e9 100644
--- a/src/video_core/textures/astc.cpp
+++ b/src/video_core/textures/astc.cpp
@@ -23,28 +23,12 @@
#include "video_core/textures/astc.h"
-class BitStream {
+class InputBitStream {
public:
- explicit BitStream(unsigned char* ptr, int nBits = 0, int start_offset = 0)
+ explicit InputBitStream(const unsigned char* ptr, int nBits = 0, int start_offset = 0)
: m_NumBits(nBits), m_CurByte(ptr), m_NextBit(start_offset % 8) {}
- ~BitStream() = default;
-
- int GetBitsWritten() const {
- return m_BitsWritten;
- }
-
- void WriteBitsR(unsigned int val, unsigned int nBits) {
- for (unsigned int i = 0; i < nBits; i++) {
- WriteBit((val >> (nBits - i - 1)) & 1);
- }
- }
-
- void WriteBits(unsigned int val, unsigned int nBits) {
- for (unsigned int i = 0; i < nBits; i++) {
- WriteBit((val >> i) & 1);
- }
- }
+ ~InputBitStream() = default;
int GetBitsRead() const {
return m_BitsRead;
@@ -71,6 +55,38 @@ public:
}
private:
+ const int m_NumBits;
+ const unsigned char* m_CurByte;
+ int m_NextBit = 0;
+ int m_BitsRead = 0;
+
+ bool done = false;
+};
+
+class OutputBitStream {
+public:
+ explicit OutputBitStream(unsigned char* ptr, int nBits = 0, int start_offset = 0)
+ : m_NumBits(nBits), m_CurByte(ptr), m_NextBit(start_offset % 8) {}
+
+ ~OutputBitStream() = default;
+
+ int GetBitsWritten() const {
+ return m_BitsWritten;
+ }
+
+ void WriteBitsR(unsigned int val, unsigned int nBits) {
+ for (unsigned int i = 0; i < nBits; i++) {
+ WriteBit((val >> (nBits - i - 1)) & 1);
+ }
+ }
+
+ void WriteBits(unsigned int val, unsigned int nBits) {
+ for (unsigned int i = 0; i < nBits; i++) {
+ WriteBit((val >> i) & 1);
+ }
+ }
+
+private:
void WriteBit(int b) {
if (done)
@@ -238,8 +254,8 @@ public:
// Fills result with the values that are encoded in the given
// bitstream. We must know beforehand what the maximum possible
// value is, and how many values we're decoding.
- static void DecodeIntegerSequence(std::vector<IntegerEncodedValue>& result, BitStream& bits,
- uint32_t maxRange, uint32_t nValues) {
+ static void DecodeIntegerSequence(std::vector<IntegerEncodedValue>& result,
+ InputBitStream& bits, uint32_t maxRange, uint32_t nValues) {
// Determine encoding parameters
IntegerEncodedValue val = IntegerEncodedValue::CreateEncoding(maxRange);
@@ -267,7 +283,7 @@ public:
}
private:
- static void DecodeTritBlock(BitStream& bits, std::vector<IntegerEncodedValue>& result,
+ static void DecodeTritBlock(InputBitStream& bits, std::vector<IntegerEncodedValue>& result,
uint32_t nBitsPerValue) {
// Implement the algorithm in section C.2.12
uint32_t m[5];
@@ -327,7 +343,7 @@ private:
}
}
- static void DecodeQuintBlock(BitStream& bits, std::vector<IntegerEncodedValue>& result,
+ static void DecodeQuintBlock(InputBitStream& bits, std::vector<IntegerEncodedValue>& result,
uint32_t nBitsPerValue) {
// Implement the algorithm in section C.2.12
uint32_t m[3];
@@ -406,7 +422,7 @@ struct TexelWeightParams {
}
};
-static TexelWeightParams DecodeBlockInfo(BitStream& strm) {
+static TexelWeightParams DecodeBlockInfo(InputBitStream& strm) {
TexelWeightParams params;
// Read the entire block mode all at once
@@ -605,7 +621,7 @@ static TexelWeightParams DecodeBlockInfo(BitStream& strm) {
return params;
}
-static void FillVoidExtentLDR(BitStream& strm, uint32_t* const outBuf, uint32_t blockWidth,
+static void FillVoidExtentLDR(InputBitStream& strm, uint32_t* const outBuf, uint32_t blockWidth,
uint32_t blockHeight) {
// Don't actually care about the void extent, just read the bits...
for (int i = 0; i < 4; ++i) {
@@ -821,7 +837,7 @@ static void DecodeColorValues(uint32_t* out, uint8_t* data, const uint32_t* mode
// We now have enough to decode our integer sequence.
std::vector<IntegerEncodedValue> decodedColorValues;
- BitStream colorStream(data);
+ InputBitStream colorStream(data);
IntegerEncodedValue::DecodeIntegerSequence(decodedColorValues, colorStream, range, nValues);
// Once we have the decoded values, we need to dequantize them to the 0-255 range
@@ -1365,9 +1381,9 @@ static void ComputeEndpoints(Pixel& ep1, Pixel& ep2, const uint32_t*& colorValue
#undef READ_INT_VALUES
}
-static void DecompressBlock(uint8_t inBuf[16], const uint32_t blockWidth,
+static void DecompressBlock(const uint8_t inBuf[16], const uint32_t blockWidth,
const uint32_t blockHeight, uint32_t* outBuf) {
- BitStream strm(inBuf);
+ InputBitStream strm(inBuf);
TexelWeightParams weightParams = DecodeBlockInfo(strm);
// Was there an error?
@@ -1421,7 +1437,7 @@ static void DecompressBlock(uint8_t inBuf[16], const uint32_t blockWidth,
// Define color data.
uint8_t colorEndpointData[16];
memset(colorEndpointData, 0, sizeof(colorEndpointData));
- BitStream colorEndpointStream(colorEndpointData, 16 * 8, 0);
+ OutputBitStream colorEndpointStream(colorEndpointData, 16 * 8, 0);
// Read extra config data...
uint32_t baseCEM = 0;
@@ -1549,7 +1565,7 @@ static void DecompressBlock(uint8_t inBuf[16], const uint32_t blockWidth,
memset(texelWeightData + clearByteStart, 0, 16 - clearByteStart);
std::vector<IntegerEncodedValue> texelWeightValues;
- BitStream weightStream(texelWeightData);
+ InputBitStream weightStream(texelWeightData);
IntegerEncodedValue::DecodeIntegerSequence(texelWeightValues, weightStream,
weightParams.m_MaxWeight,
@@ -1597,7 +1613,7 @@ static void DecompressBlock(uint8_t inBuf[16], const uint32_t blockWidth,
namespace Tegra::Texture::ASTC {
-std::vector<uint8_t> Decompress(std::vector<uint8_t>& data, uint32_t width, uint32_t height,
+std::vector<uint8_t> Decompress(const uint8_t* data, uint32_t width, uint32_t height,
uint32_t depth, uint32_t block_width, uint32_t block_height) {
uint32_t blockIdx = 0;
std::vector<uint8_t> outData(height * width * depth * 4);
@@ -1605,7 +1621,7 @@ std::vector<uint8_t> Decompress(std::vector<uint8_t>& data, uint32_t width, uint
for (uint32_t j = 0; j < height; j += block_height) {
for (uint32_t i = 0; i < width; i += block_width) {
- uint8_t* blockPtr = data.data() + blockIdx * 16;
+ const uint8_t* blockPtr = data + blockIdx * 16;
// Blocks can be at most 12x12
uint32_t uncompData[144];
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 00:11:50 +0100