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update libwebp up to 0.3.0

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This commit is contained in:
AoD314
2013-04-02 15:22:10 +04:00
parent db45e04d58
commit 740941c8b8
64 changed files with 5394 additions and 2773 deletions
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107
3rdparty/libwebp/utils/bit_reader.c vendored
View File

@@ -15,7 +15,11 @@
extern "C" {
#endif
#define MK(X) (((bit_t)(X) << (BITS)) | (MASK))
#ifndef USE_RIGHT_JUSTIFY
#define MK(X) (((range_t)(X) << (BITS)) | (MASK))
#else
#define MK(X) ((range_t)(X))
#endif
//------------------------------------------------------------------------------
// VP8BitReader
@@ -29,7 +33,7 @@ void VP8InitBitReader(VP8BitReader* const br,
br->buf_ = start;
br->buf_end_ = end;
br->value_ = 0;
br->missing_ = 8; // to load the very first 8bits
br->bits_ = -8; // to load the very first 8bits
br->eof_ = 0;
}
@@ -46,7 +50,7 @@ const uint8_t kVP8Log2Range[128] = {
};
// range = (range << kVP8Log2Range[range]) + trailing 1's
const bit_t kVP8NewRange[128] = {
const range_t kVP8NewRange[128] = {
MK(127), MK(127), MK(191), MK(127), MK(159), MK(191), MK(223), MK(127),
MK(143), MK(159), MK(175), MK(191), MK(207), MK(223), MK(239), MK(127),
MK(135), MK(143), MK(151), MK(159), MK(167), MK(175), MK(183), MK(191),
@@ -71,9 +75,19 @@ void VP8LoadFinalBytes(VP8BitReader* const br) {
assert(br != NULL && br->buf_ != NULL);
// Only read 8bits at a time
if (br->buf_ < br->buf_end_) {
br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 + br->missing_);
br->missing_ -= 8;
} else {
#ifndef USE_RIGHT_JUSTIFY
br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 - br->bits_);
#else
br->value_ = (bit_t)(*br->buf_++) | (br->value_ << 8);
#endif
br->bits_ += 8;
} else if (!br->eof_) {
#ifdef USE_RIGHT_JUSTIFY
// These are not strictly needed, but it makes the behaviour
// consistent for both USE_RIGHT_JUSTIFY and !USE_RIGHT_JUSTIFY.
br->value_ <<= 8;
br->bits_ += 8;
#endif
br->eof_ = 1;
}
}
@@ -99,6 +113,10 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int bits) {
#define MAX_NUM_BIT_READ 25
#define LBITS 64 // Number of bits prefetched.
#define WBITS 32 // Minimum number of bytes needed after VP8LFillBitWindow.
#define LOG8_WBITS 4 // Number of bytes needed to store WBITS bits.
static const uint32_t kBitMask[MAX_NUM_BIT_READ] = {
0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767,
65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215
@@ -120,7 +138,7 @@ void VP8LInitBitReader(VP8LBitReader* const br,
br->eos_ = 0;
br->error_ = 0;
for (i = 0; i < sizeof(br->val_) && i < br->len_; ++i) {
br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i);
br->val_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (8 * i);
++br->pos_;
}
}
@@ -135,91 +153,56 @@ void VP8LBitReaderSetBuffer(VP8LBitReader* const br,
br->len_ = len;
}
// If not at EOS, reload up to LBITS byte-by-byte
static void ShiftBytes(VP8LBitReader* const br) {
while (br->bit_pos_ >= 8 && br->pos_ < br->len_) {
br->val_ >>= 8;
br->val_ |= ((uint64_t)br->buf_[br->pos_]) << 56;
br->val_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (LBITS - 8);
++br->pos_;
br->bit_pos_ -= 8;
}
}
void VP8LFillBitWindow(VP8LBitReader* const br) {
if (br->bit_pos_ >= 32) {
#if defined(__x86_64__) || defined(_M_X64)
if (br->pos_ + 8 < br->len_) {
br->val_ >>= 32;
if (br->bit_pos_ >= WBITS) {
#if (defined(__x86_64__) || defined(_M_X64))
if (br->pos_ + sizeof(br->val_) < br->len_) {
br->val_ >>= WBITS;
br->bit_pos_ -= WBITS;
// The expression below needs a little-endian arch to work correctly.
// This gives a large speedup for decoding speed.
br->val_ |= *(const uint64_t *)(br->buf_ + br->pos_) << 32;
br->pos_ += 4;
br->bit_pos_ -= 32;
} else {
// Slow path.
ShiftBytes(br);
br->val_ |= *(const vp8l_val_t*)(br->buf_ + br->pos_) << (LBITS - WBITS);
br->pos_ += LOG8_WBITS;
return;
}
#else
// Always the slow path.
ShiftBytes(br);
#endif
}
if (br->pos_ == br->len_ && br->bit_pos_ == 64) {
br->eos_ = 1;
}
}
uint32_t VP8LReadOneBit(VP8LBitReader* const br) {
const uint32_t val = (br->val_ >> br->bit_pos_) & 1;
// Flag an error at end_of_stream.
if (!br->eos_) {
++br->bit_pos_;
if (br->bit_pos_ >= 32) {
ShiftBytes(br);
}
// After this last bit is read, check if eos needs to be flagged.
if (br->pos_ == br->len_ && br->bit_pos_ == 64) {
ShiftBytes(br); // Slow path.
if (br->pos_ == br->len_ && br->bit_pos_ == LBITS) {
br->eos_ = 1;
}
} else {
br->error_ = 1;
}
return val;
}
uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits) {
uint32_t val = 0;
assert(n_bits >= 0);
// Flag an error if end_of_stream or n_bits is more than allowed limit.
if (!br->eos_ && n_bits < MAX_NUM_BIT_READ) {
const uint32_t val =
(uint32_t)(br->val_ >> br->bit_pos_) & kBitMask[n_bits];
const int new_bits = br->bit_pos_ + n_bits;
br->bit_pos_ = new_bits;
// If this read is going to cross the read buffer, set the eos flag.
if (br->pos_ == br->len_) {
if ((br->bit_pos_ + n_bits) >= 64) {
if (new_bits >= LBITS) {
br->eos_ = 1;
if ((br->bit_pos_ + n_bits) > 64) return val;
}
}
val = (br->val_ >> br->bit_pos_) & kBitMask[n_bits];
br->bit_pos_ += n_bits;
if (br->bit_pos_ >= 40) {
if (br->pos_ + 5 < br->len_) {
br->val_ >>= 40;
br->val_ |=
(((uint64_t)br->buf_[br->pos_ + 0]) << 24) |
(((uint64_t)br->buf_[br->pos_ + 1]) << 32) |
(((uint64_t)br->buf_[br->pos_ + 2]) << 40) |
(((uint64_t)br->buf_[br->pos_ + 3]) << 48) |
(((uint64_t)br->buf_[br->pos_ + 4]) << 56);
br->pos_ += 5;
br->bit_pos_ -= 40;
}
if (br->bit_pos_ >= 8) {
ShiftBytes(br);
}
}
ShiftBytes(br);
return val;
} else {
br->error_ = 1;
return 0;
}
return val;
}
//------------------------------------------------------------------------------

227
3rdparty/libwebp/utils/bit_reader.h vendored
View File

@@ -24,11 +24,80 @@
extern "C" {
#endif
#define BITS 32 // can be 32, 16 or 8
#define MASK ((((bit_t)1) << (BITS)) - 1)
#if (BITS == 32)
typedef uint64_t bit_t; // natural register type
typedef uint32_t lbit_t; // natural type for memory I/O
// The Boolean decoder needs to maintain infinite precision on the value_ field.
// However, since range_ is only 8bit, we only need an active window of 8 bits
// for value_. Left bits (MSB) gets zeroed and shifted away when value_ falls
// below 128, range_ is updated, and fresh bits read from the bitstream are
// brought in as LSB.
// To avoid reading the fresh bits one by one (slow), we cache a few of them
// ahead (actually, we cache BITS of them ahead. See below). There's two
// strategies regarding how to shift these looked-ahead fresh bits into the
// 8bit window of value_: either we shift them in, while keeping the position of
// the window fixed. Or we slide the window to the right while keeping the cache
// bits at a fixed, right-justified, position.
//
// Example, for BITS=16: here is the content of value_ for both strategies:
//
// !USE_RIGHT_JUSTIFY || USE_RIGHT_JUSTIFY
// ||
// <- 8b -><- 8b -><- BITS bits -> || <- 8b+3b -><- 8b -><- 13 bits ->
// [unused][value_][cached bits][0] || [unused...][value_][cached bits]
// [........00vvvvvvBBBBBBBBBBBBB000]LSB || [...........00vvvvvvBBBBBBBBBBBBB]
// ||
// After calling VP8Shift(), where we need to shift away two zeros:
// [........vvvvvvvvBBBBBBBBBBB00000]LSB || [.............vvvvvvvvBBBBBBBBBBB]
// ||
// Just before we need to call VP8LoadNewBytes(), the situation is:
// [........vvvvvv000000000000000000]LSB || [..........................vvvvvv]
// ||
// And just after calling VP8LoadNewBytes():
// [........vvvvvvvvBBBBBBBBBBBBBBBB]LSB || [........vvvvvvvvBBBBBBBBBBBBBBBB]
//
// -> we're back to height active 'value_' bits (marked 'v') and BITS cached
// bits (marked 'B')
//
// The right-justify strategy tends to use less shifts and is often faster.
//------------------------------------------------------------------------------
// BITS can be any multiple of 8 from 8 to 56 (inclusive).
// Pick values that fit natural register size.
#if !defined(WEBP_REFERENCE_IMPLEMENTATION)
#define USE_RIGHT_JUSTIFY
#if defined(__i386__) || defined(_M_IX86) // x86 32bit
#define BITS 16
#elif defined(__x86_64__) || defined(_M_X64) // x86 64bit
#define BITS 56
#elif defined(__arm__) || defined(_M_ARM) // ARM
#define BITS 24
#else // reasonable default
#define BITS 24
#endif
#else // reference choices
#define USE_RIGHT_JUSTIFY
#define BITS 8
#endif
//------------------------------------------------------------------------------
// Derived types and constants
// bit_t = natural register type
// lbit_t = natural type for memory I/O
#if (BITS > 32)
typedef uint64_t bit_t;
typedef uint64_t lbit_t;
#elif (BITS == 32)
typedef uint64_t bit_t;
typedef uint32_t lbit_t;
#elif (BITS == 24)
typedef uint32_t bit_t;
typedef uint32_t lbit_t;
#elif (BITS == 16)
typedef uint32_t bit_t;
typedef uint16_t lbit_t;
@@ -37,8 +106,15 @@ typedef uint32_t bit_t;
typedef uint8_t lbit_t;
#endif
#ifndef USE_RIGHT_JUSTIFY
typedef bit_t range_t; // type for storing range_
#define MASK ((((bit_t)1) << (BITS)) - 1)
#else
typedef uint32_t range_t; // range_ only uses 8bits here. No need for bit_t.
#endif
//------------------------------------------------------------------------------
// Bitreader and code-tree reader
// Bitreader
typedef struct VP8BitReader VP8BitReader;
struct VP8BitReader {
@@ -47,9 +123,9 @@ struct VP8BitReader {
int eof_; // true if input is exhausted
// boolean decoder
bit_t range_; // current range minus 1. In [127, 254] interval.
bit_t value_; // current value
int missing_; // number of missing bits in value_ (8bit)
range_t range_; // current range minus 1. In [127, 254] interval.
bit_t value_; // current value
int bits_; // number of valid bits left
};
// Initialize the bit reader and the boolean decoder.
@@ -67,12 +143,12 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int num_bits);
// Read a bit with proba 'prob'. Speed-critical function!
extern const uint8_t kVP8Log2Range[128];
extern const bit_t kVP8NewRange[128];
extern const range_t kVP8NewRange[128];
void VP8LoadFinalBytes(VP8BitReader* const br); // special case for the tail
static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) {
assert(br && br->buf_);
assert(br != NULL && br->buf_ != NULL);
// Read 'BITS' bits at a time if possible.
if (br->buf_ + sizeof(lbit_t) <= br->buf_end_) {
// convert memory type to register type (with some zero'ing!)
@@ -80,70 +156,124 @@ static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) {
lbit_t in_bits = *(lbit_t*)br->buf_;
br->buf_ += (BITS) >> 3;
#if !defined(__BIG_ENDIAN__)
#if (BITS == 32)
#if (BITS > 32)
// gcc 4.3 has builtin functions for swap32/swap64
#if defined(__GNUC__) && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
bits = (bit_t)__builtin_bswap64(in_bits);
#elif defined(_MSC_VER)
bits = (bit_t)_byteswap_uint64(in_bits);
#elif defined(__x86_64__)
__asm__ volatile("bswapq %0" : "=r"(bits) : "0"(in_bits));
#else // generic code for swapping 64-bit values (suggested by bdb@)
bits = (bit_t)in_bits;
bits = ((bits & 0xffffffff00000000ull) >> 32) |
((bits & 0x00000000ffffffffull) << 32);
bits = ((bits & 0xffff0000ffff0000ull) >> 16) |
((bits & 0x0000ffff0000ffffull) << 16);
bits = ((bits & 0xff00ff00ff00ff00ull) >> 8) |
((bits & 0x00ff00ff00ff00ffull) << 8);
#endif
bits >>= 64 - BITS;
#elif (BITS >= 24)
#if defined(__i386__) || defined(__x86_64__)
__asm__ volatile("bswap %k0" : "=r"(in_bits) : "0"(in_bits));
bits = (bit_t)in_bits; // 32b -> 64b zero-extension
bits = (bit_t)in_bits; // 24b/32b -> 32b/64b zero-extension
#elif defined(_MSC_VER)
bits = _byteswap_ulong(in_bits);
bits = (bit_t)_byteswap_ulong(in_bits);
#else
bits = (bit_t)(in_bits >> 24) | ((in_bits >> 8) & 0xff00)
| ((in_bits << 8) & 0xff0000) | (in_bits << 24);
#endif // x86
bits >>= (32 - BITS);
#elif (BITS == 16)
// gcc will recognize a 'rorw $8, ...' here:
bits = (bit_t)(in_bits >> 8) | ((in_bits & 0xff) << 8);
#else // BITS == 8
bits = (bit_t)in_bits;
#endif
#else // LITTLE_ENDIAN
#else // BIG_ENDIAN
bits = (bit_t)in_bits;
#endif
br->value_ |= bits << br->missing_;
br->missing_ -= (BITS);
#ifndef USE_RIGHT_JUSTIFY
br->value_ |= bits << (-br->bits_);
#else
br->value_ = bits | (br->value_ << (BITS));
#endif
br->bits_ += (BITS);
} else {
VP8LoadFinalBytes(br); // no need to be inlined
}
}
static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, bit_t split) {
const bit_t value_split = split | (MASK);
if (br->missing_ > 0) { // Make sure we have a least BITS bits in 'value_'
static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, range_t split) {
if (br->bits_ < 0) { // Make sure we have a least BITS bits in 'value_'
VP8LoadNewBytes(br);
}
if (br->value_ > value_split) {
br->range_ -= value_split + 1;
br->value_ -= value_split + 1;
#ifndef USE_RIGHT_JUSTIFY
split |= (MASK);
if (br->value_ > split) {
br->range_ -= split + 1;
br->value_ -= split + 1;
return 1;
} else {
br->range_ = value_split;
br->range_ = split;
return 0;
}
#else
{
const int pos = br->bits_;
const range_t value = (range_t)(br->value_ >> pos);
if (value > split) {
br->range_ -= split + 1;
br->value_ -= (bit_t)(split + 1) << pos;
return 1;
} else {
br->range_ = split;
return 0;
}
}
#endif
}
static WEBP_INLINE void VP8Shift(VP8BitReader* const br) {
#ifndef USE_RIGHT_JUSTIFY
// range_ is in [0..127] interval here.
const int idx = br->range_ >> (BITS);
const bit_t idx = br->range_ >> (BITS);
const int shift = kVP8Log2Range[idx];
br->range_ = kVP8NewRange[idx];
br->value_ <<= shift;
br->missing_ += shift;
br->bits_ -= shift;
#else
const int shift = kVP8Log2Range[br->range_];
assert(br->range_ < (range_t)128);
br->range_ = kVP8NewRange[br->range_];
br->bits_ -= shift;
#endif
}
static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) {
#ifndef USE_RIGHT_JUSTIFY
// It's important to avoid generating a 64bit x 64bit multiply here.
// We just need an 8b x 8b after all.
const bit_t split =
(bit_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8);
const range_t split =
(range_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8);
const int bit = VP8BitUpdate(br, split);
if (br->range_ <= (((bit_t)0x7e << (BITS)) | (MASK))) {
if (br->range_ <= (((range_t)0x7e << (BITS)) | (MASK))) {
VP8Shift(br);
}
return bit;
#else
const range_t split = (br->range_ * prob) >> 8;
const int bit = VP8BitUpdate(br, split);
if (br->range_ <= (range_t)0x7e) {
VP8Shift(br);
}
return bit;
#endif
}
static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) {
const bit_t split = (br->range_ >> 1);
const range_t split = (br->range_ >> 1);
const int bit = VP8BitUpdate(br, split);
VP8Shift(br);
return bit ? -v : v;
@@ -151,16 +281,18 @@ static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) {
// -----------------------------------------------------------------------------
// Bitreader
// Bitreader for lossless format
typedef uint64_t vp8l_val_t; // right now, this bit-reader can only use 64bit.
typedef struct {
uint64_t val_;
const uint8_t* buf_;
size_t len_;
size_t pos_;
int bit_pos_;
int eos_;
int error_;
vp8l_val_t val_; // pre-fetched bits
const uint8_t* buf_; // input byte buffer
size_t len_; // buffer length
size_t pos_; // byte position in buf_
int bit_pos_; // current bit-reading position in val_
int eos_; // bitstream is finished
int error_; // an error occurred (buffer overflow attempt...)
} VP8LBitReader;
void VP8LInitBitReader(VP8LBitReader* const br,
@@ -176,17 +308,14 @@ void VP8LBitReaderSetBuffer(VP8LBitReader* const br,
// Flags eos if this read attempt is going to cross the read buffer.
uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits);
// Reads one bit from Read Buffer. Flags an error in case end_of_stream.
// Flags eos after reading last bit from the buffer.
uint32_t VP8LReadOneBit(VP8LBitReader* const br);
// Return the prefetched bits, so they can be looked up.
static WEBP_INLINE uint32_t VP8LPrefetchBits(VP8LBitReader* const br) {
return (uint32_t)(br->val_ >> br->bit_pos_);
}
// VP8LReadOneBitUnsafe is faster than VP8LReadOneBit, but it can be called only
// 32 times after the last VP8LFillBitWindow. Any subsequent calls
// (without VP8LFillBitWindow) will return invalid data.
static WEBP_INLINE uint32_t VP8LReadOneBitUnsafe(VP8LBitReader* const br) {
const uint32_t val = (br->val_ >> br->bit_pos_) & 1;
++br->bit_pos_;
return val;
// Discard 'num_bits' bits from the cache.
static WEBP_INLINE void VP8LDiscardBits(VP8LBitReader* const br, int num_bits) {
br->bit_pos_ += num_bits;
}
// Advances the Read buffer by 4 bytes to make room for reading next 32 bits.

67
3rdparty/libwebp/utils/filters.c vendored
View File

@@ -26,8 +26,7 @@ extern "C" {
assert(out != NULL); \
assert(width > 0); \
assert(height > 0); \
assert(bpp > 0); \
assert(stride >= width * bpp);
assert(stride >= width);
static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred,
uint8_t* dst, int length, int inverse) {
@@ -43,7 +42,8 @@ static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred,
// Horizontal filter.
static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in,
int width, int height, int bpp, int stride, int inverse, uint8_t* out) {
int width, int height, int stride,
int inverse, uint8_t* out) {
int h;
const uint8_t* preds = (inverse ? out : in);
SANITY_CHECK(in, out);
@@ -52,11 +52,11 @@ static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in,
for (h = 0; h < height; ++h) {
// Leftmost pixel is predicted from above (except for topmost scanline).
if (h == 0) {
memcpy((void*)out, (const void*)in, bpp);
out[0] = in[0];
} else {
PredictLine(in, preds - stride, out, bpp, inverse);
PredictLine(in, preds - stride, out, 1, inverse);
}
PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse);
PredictLine(in + 1, preds, out + 1, width - 1, inverse);
preds += stride;
in += stride;
out += stride;
@@ -64,46 +64,46 @@ static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in,
}
static void HorizontalFilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* filtered_data) {
DoHorizontalFilter(data, width, height, bpp, stride, 0, filtered_data);
int stride, uint8_t* filtered_data) {
DoHorizontalFilter(data, width, height, stride, 0, filtered_data);
}
static void HorizontalUnfilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* recon_data) {
DoHorizontalFilter(data, width, height, bpp, stride, 1, recon_data);
static void HorizontalUnfilter(int width, int height, int stride,
uint8_t* data) {
DoHorizontalFilter(data, width, height, stride, 1, data);
}
//------------------------------------------------------------------------------
// Vertical filter.
static WEBP_INLINE void DoVerticalFilter(const uint8_t* in,
int width, int height, int bpp, int stride, int inverse, uint8_t* out) {
int width, int height, int stride,
int inverse, uint8_t* out) {
int h;
const uint8_t* preds = (inverse ? out : in);
SANITY_CHECK(in, out);
// Very first top-left pixel is copied.
memcpy((void*)out, (const void*)in, bpp);
out[0] = in[0];
// Rest of top scan-line is left-predicted.
PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse);
PredictLine(in + 1, preds, out + 1, width - 1, inverse);
// Filter line-by-line.
for (h = 1; h < height; ++h) {
in += stride;
out += stride;
PredictLine(in, preds, out, bpp * width, inverse);
PredictLine(in, preds, out, width, inverse);
preds += stride;
}
}
static void VerticalFilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* filtered_data) {
DoVerticalFilter(data, width, height, bpp, stride, 0, filtered_data);
int stride, uint8_t* filtered_data) {
DoVerticalFilter(data, width, height, stride, 0, filtered_data);
}
static void VerticalUnfilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* recon_data) {
DoVerticalFilter(data, width, height, bpp, stride, 1, recon_data);
static void VerticalUnfilter(int width, int height, int stride, uint8_t* data) {
DoVerticalFilter(data, width, height, stride, 1, data);
}
//------------------------------------------------------------------------------
@@ -111,19 +111,19 @@ static void VerticalUnfilter(const uint8_t* data, int width, int height,
static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) {
const int g = a + b - c;
return (g < 0) ? 0 : (g > 255) ? 255 : g;
return ((g & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit
}
static WEBP_INLINE
void DoGradientFilter(const uint8_t* in, int width, int height,
int bpp, int stride, int inverse, uint8_t* out) {
int stride, int inverse, uint8_t* out) {
const uint8_t* preds = (inverse ? out : in);
int h;
SANITY_CHECK(in, out);
// left prediction for top scan-line
memcpy((void*)out, (const void*)in, bpp);
PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse);
out[0] = in[0];
PredictLine(in + 1, preds, out + 1, width - 1, inverse);
// Filter line-by-line.
for (h = 1; h < height; ++h) {
@@ -132,24 +132,23 @@ void DoGradientFilter(const uint8_t* in, int width, int height,
in += stride;
out += stride;
// leftmost pixel: predict from above.
PredictLine(in, preds - stride, out, bpp, inverse);
for (w = bpp; w < width * bpp; ++w) {
const int pred = GradientPredictor(preds[w - bpp],
PredictLine(in, preds - stride, out, 1, inverse);
for (w = 1; w < width; ++w) {
const int pred = GradientPredictor(preds[w - 1],
preds[w - stride],
preds[w - stride - bpp]);
preds[w - stride - 1]);
out[w] = in[w] + (inverse ? pred : -pred);
}
}
}
static void GradientFilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* filtered_data) {
DoGradientFilter(data, width, height, bpp, stride, 0, filtered_data);
int stride, uint8_t* filtered_data) {
DoGradientFilter(data, width, height, stride, 0, filtered_data);
}
static void GradientUnfilter(const uint8_t* data, int width, int height,
int bpp, int stride, uint8_t* recon_data) {
DoGradientFilter(data, width, height, bpp, stride, 1, recon_data);
static void GradientUnfilter(int width, int height, int stride, uint8_t* data) {
DoGradientFilter(data, width, height, stride, 1, data);
}
#undef SANITY_CHECK
@@ -215,7 +214,7 @@ const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST] = {
GradientFilter // WEBP_FILTER_GRADIENT
};
const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST] = {
const WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST] = {
NULL, // WEBP_FILTER_NONE
HorizontalUnfilter, // WEBP_FILTER_HORIZONTAL
VerticalUnfilter, // WEBP_FILTER_VERTICAL

9
3rdparty/libwebp/utils/filters.h vendored
View File

@@ -30,18 +30,19 @@ typedef enum {
} WEBP_FILTER_TYPE;
typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height,
int bpp, int stride, uint8_t* out);
int stride, uint8_t* out);
typedef void (*WebPUnfilterFunc)(int width, int height, int stride,
uint8_t* data);
// Filter the given data using the given predictor.
// 'in' corresponds to a 2-dimensional pixel array of size (stride * height)
// in raster order.
// 'bpp' is number of bytes per pixel, and
// 'stride' is number of bytes per scan line (with possible padding).
// 'out' should be pre-allocated.
extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST];
// Reconstruct the original data from the given filtered data.
extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST];
// In-place reconstruct the original data from the given filtered data.
extern const WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST];
// Fast estimate of a potentially good filter.
extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data,

15
3rdparty/libwebp/utils/huffman_encode.c vendored
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@@ -138,13 +138,8 @@ static int CompareHuffmanTrees(const void* ptr1, const void* ptr2) {
} else if (t1->total_count_ < t2->total_count_) {
return 1;
} else {
if (t1->value_ < t2->value_) {
return -1;
}
if (t1->value_ > t2->value_) {
return 1;
}
return 0;
assert(t1->value_ != t2->value_);
return (t1->value_ < t2->value_) ? -1 : 1;
}
}
@@ -193,6 +188,10 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size,
}
}
if (tree_size_orig == 0) { // pretty optimal already!
return 1;
}
// 3 * tree_size is enough to cover all the nodes representing a
// population and all the inserted nodes combining two existing nodes.
// The tree pool needs 2 * (tree_size_orig - 1) entities, and the
@@ -234,7 +233,7 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size,
tree_pool[tree_pool_size++] = tree[tree_size - 1];
tree_pool[tree_pool_size++] = tree[tree_size - 2];
count = tree_pool[tree_pool_size - 1].total_count_ +
tree_pool[tree_pool_size - 2].total_count_;
tree_pool[tree_pool_size - 2].total_count_;
tree_size -= 2;
{
// Search for the insertion point.

9
3rdparty/libwebp/utils/quant_levels.c vendored
View File

@@ -140,15 +140,6 @@ int QuantizeLevels(uint8_t* const data, int width, int height,
return 1;
}
int DequantizeLevels(uint8_t* const data, int width, int height) {
if (data == NULL || width <= 0 || height <= 0) return 0;
// TODO(skal): implement gradient smoothing.
(void)data;
(void)width;
(void)height;
return 1;
}
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif

5
3rdparty/libwebp/utils/quant_levels.h vendored
View File

@@ -27,11 +27,6 @@ extern "C" {
int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels,
uint64_t* const sse);
// Apply post-processing to input 'data' of size 'width'x'height' assuming
// that the source was quantized to a reduced number of levels.
// Returns false in case of error (data is NULL, invalid parameters, ...).
int DequantizeLevels(uint8_t* const data, int width, int height);
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif

28
3rdparty/libwebp/utils/quant_levels_dec.c vendored Normal file
View File

@@ -0,0 +1,28 @@
// Copyright 2013 Google Inc. All Rights Reserved.
//
// This code is licensed under the same terms as WebM:
// Software License Agreement: http://www.webmproject.org/license/software/
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
// -----------------------------------------------------------------------------
//
// TODO(skal): implement gradient smoothing.
//
// Author: Skal (pascal.massimino@gmail.com)
#include "./quant_levels_dec.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
int DequantizeLevels(uint8_t* const data, int width, int height) {
if (data == NULL || width <= 0 || height <= 0) return 0;
(void)data;
(void)width;
(void)height;
return 1;
}
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif

30
3rdparty/libwebp/utils/quant_levels_dec.h vendored Normal file
View File

@@ -0,0 +1,30 @@
// Copyright 2013 Google Inc. All Rights Reserved.
//
// This code is licensed under the same terms as WebM:
// Software License Agreement: http://www.webmproject.org/license/software/
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
// -----------------------------------------------------------------------------
//
// Alpha plane de-quantization utility
//
// Author: Vikas Arora (vikasa@google.com)
#ifndef WEBP_UTILS_QUANT_LEVELS_DEC_H_
#define WEBP_UTILS_QUANT_LEVELS_DEC_H_
#include "../webp/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
// Apply post-processing to input 'data' of size 'width'x'height' assuming
// that the source was quantized to a reduced number of levels.
// Returns false in case of error (data is NULL, invalid parameters, ...).
int DequantizeLevels(uint8_t* const data, int width, int height);
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
#endif /* WEBP_UTILS_QUANT_LEVELS_DEC_H_ */

2
3rdparty/libwebp/utils/rescaler.c vendored
View File

@@ -20,7 +20,7 @@ extern "C" {
#endif
#define RFIX 30
#define MULT_FIX(x,y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,
uint8_t* const dst, int dst_width, int dst_height,

4
3rdparty/libwebp/utils/thread.c vendored
View File

@@ -9,10 +9,6 @@
//
// Author: Skal (pascal.massimino@gmail.com)
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <string.h> // for memset()
#include "./thread.h"

12
3rdparty/libwebp/utils/thread.h vendored
View File

@@ -12,6 +12,10 @@
#ifndef WEBP_UTILS_THREAD_H_
#define WEBP_UTILS_THREAD_H_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
@@ -63,13 +67,13 @@ typedef struct {
// Must be called first, before any other method.
void WebPWorkerInit(WebPWorker* const worker);
// Must be called initialize the object and spawn the thread. Re-entrant.
// Must be called to initialize the object and spawn the thread. Re-entrant.
// Will potentially launch the thread. Returns false in case of error.
int WebPWorkerReset(WebPWorker* const worker);
// Make sure the previous work is finished. Returns true if worker->had_error
// was not set and not error condition was triggered by the working thread.
// Makes sure the previous work is finished. Returns true if worker->had_error
// was not set and no error condition was triggered by the working thread.
int WebPWorkerSync(WebPWorker* const worker);
// Trigger the thread to call hook() with data1 and data2 argument. These
// Triggers the thread to call hook() with data1 and data2 argument. These
// hook/data1/data2 can be changed at any time before calling this function,
// but not be changed afterward until the next call to WebPWorkerSync().
void WebPWorkerLaunch(WebPWorker* const worker);

9
3rdparty/libwebp/utils/utils.c vendored
View File

@@ -19,7 +19,8 @@ extern "C" {
//------------------------------------------------------------------------------
// Checked memory allocation
static int CheckSizeArguments(uint64_t nmemb, size_t size) {
// Returns 0 in case of overflow of nmemb * size.
static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) {
const uint64_t total_size = nmemb * size;
if (nmemb == 0) return 1;
if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0;
@@ -28,12 +29,14 @@ static int CheckSizeArguments(uint64_t nmemb, size_t size) {
}
void* WebPSafeMalloc(uint64_t nmemb, size_t size) {
if (!CheckSizeArguments(nmemb, size)) return NULL;
if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL;
assert(nmemb * size > 0);
return malloc((size_t)(nmemb * size));
}
void* WebPSafeCalloc(uint64_t nmemb, size_t size) {
if (!CheckSizeArguments(nmemb, size)) return NULL;
if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL;
assert(nmemb * size > 0);
return calloc((size_t)nmemb, size);
}

39
3rdparty/libwebp/utils/utils.h vendored
View File

@@ -7,11 +7,14 @@
//
// Misc. common utility functions
//
// Author: Skal (pascal.massimino@gmail.com)
// Authors: Skal (pascal.massimino@gmail.com)
// Urvang (urvang@google.com)
#ifndef WEBP_UTILS_UTILS_H_
#define WEBP_UTILS_UTILS_H_
#include <assert.h>
#include "../webp/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
@@ -35,6 +38,40 @@ void* WebPSafeMalloc(uint64_t nmemb, size_t size);
// in order to favor the "calloc(num_foo, sizeof(foo))" pattern.
void* WebPSafeCalloc(uint64_t nmemb, size_t size);
//------------------------------------------------------------------------------
// Reading/writing data.
// Read 16, 24 or 32 bits stored in little-endian order.
static WEBP_INLINE int GetLE16(const uint8_t* const data) {
return (int)(data[0] << 0) | (data[1] << 8);
}
static WEBP_INLINE int GetLE24(const uint8_t* const data) {
return GetLE16(data) | (data[2] << 16);
}
static WEBP_INLINE uint32_t GetLE32(const uint8_t* const data) {
return (uint32_t)GetLE16(data) | (GetLE16(data + 2) << 16);
}
// Store 16, 24 or 32 bits in little-endian order.
static WEBP_INLINE void PutLE16(uint8_t* const data, int val) {
assert(val < (1 << 16));
data[0] = (val >> 0);
data[1] = (val >> 8);
}
static WEBP_INLINE void PutLE24(uint8_t* const data, int val) {
assert(val < (1 << 24));
PutLE16(data, val & 0xffff);
data[2] = (val >> 16);
}
static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) {
PutLE16(data, (int)(val & 0xffff));
PutLE16(data + 2, (int)(val >> 16));
}
//------------------------------------------------------------------------------
#if defined(__cplusplus) || defined(c_plusplus)