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-rw-r--r--src/main/jni/libwebp/utils/bit_writer.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/src/main/jni/libwebp/utils/bit_writer.c b/src/main/jni/libwebp/utils/bit_writer.c
deleted file mode 100644
index 9875ca662..000000000
--- a/src/main/jni/libwebp/utils/bit_writer.c
+++ /dev/null
@@ -1,307 +0,0 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Bit writing and boolean coder
-//
-// Author: Skal (pascal.massimino@gmail.com)
-// Vikas Arora (vikaas.arora@gmail.com)
-
-#include <assert.h>
-#include <string.h> // for memcpy()
-#include <stdlib.h>
-
-#include "./bit_writer.h"
-#include "./endian_inl.h"
-#include "./utils.h"
-
-//------------------------------------------------------------------------------
-// VP8BitWriter
-
-static int BitWriterResize(VP8BitWriter* const bw, size_t extra_size) {
- uint8_t* new_buf;
- size_t new_size;
- const uint64_t needed_size_64b = (uint64_t)bw->pos_ + extra_size;
- const size_t needed_size = (size_t)needed_size_64b;
- if (needed_size_64b != needed_size) {
- bw->error_ = 1;
- return 0;
- }
- if (needed_size <= bw->max_pos_) return 1;
- // If the following line wraps over 32bit, the test just after will catch it.
- new_size = 2 * bw->max_pos_;
- if (new_size < needed_size) new_size = needed_size;
- if (new_size < 1024) new_size = 1024;
- new_buf = (uint8_t*)WebPSafeMalloc(1ULL, new_size);
- if (new_buf == NULL) {
- bw->error_ = 1;
- return 0;
- }
- if (bw->pos_ > 0) {
- assert(bw->buf_ != NULL);
- memcpy(new_buf, bw->buf_, bw->pos_);
- }
- WebPSafeFree(bw->buf_);
- bw->buf_ = new_buf;
- bw->max_pos_ = new_size;
- return 1;
-}
-
-static void Flush(VP8BitWriter* const bw) {
- const int s = 8 + bw->nb_bits_;
- const int32_t bits = bw->value_ >> s;
- assert(bw->nb_bits_ >= 0);
- bw->value_ -= bits << s;
- bw->nb_bits_ -= 8;
- if ((bits & 0xff) != 0xff) {
- size_t pos = bw->pos_;
- if (!BitWriterResize(bw, bw->run_ + 1)) {
- return;
- }
- if (bits & 0x100) { // overflow -> propagate carry over pending 0xff's
- if (pos > 0) bw->buf_[pos - 1]++;
- }
- if (bw->run_ > 0) {
- const int value = (bits & 0x100) ? 0x00 : 0xff;
- for (; bw->run_ > 0; --bw->run_) bw->buf_[pos++] = value;
- }
- bw->buf_[pos++] = bits;
- bw->pos_ = pos;
- } else {
- bw->run_++; // delay writing of bytes 0xff, pending eventual carry.
- }
-}
-
-//------------------------------------------------------------------------------
-// renormalization
-
-static const uint8_t kNorm[128] = { // renorm_sizes[i] = 8 - log2(i)
- 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 0
-};
-
-// range = ((range + 1) << kVP8Log2Range[range]) - 1
-static const uint8_t kNewRange[128] = {
- 127, 127, 191, 127, 159, 191, 223, 127, 143, 159, 175, 191, 207, 223, 239,
- 127, 135, 143, 151, 159, 167, 175, 183, 191, 199, 207, 215, 223, 231, 239,
- 247, 127, 131, 135, 139, 143, 147, 151, 155, 159, 163, 167, 171, 175, 179,
- 183, 187, 191, 195, 199, 203, 207, 211, 215, 219, 223, 227, 231, 235, 239,
- 243, 247, 251, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149,
- 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179,
- 181, 183, 185, 187, 189, 191, 193, 195, 197, 199, 201, 203, 205, 207, 209,
- 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239,
- 241, 243, 245, 247, 249, 251, 253, 127
-};
-
-int VP8PutBit(VP8BitWriter* const bw, int bit, int prob) {
- const int split = (bw->range_ * prob) >> 8;
- if (bit) {
- bw->value_ += split + 1;
- bw->range_ -= split + 1;
- } else {
- bw->range_ = split;
- }
- if (bw->range_ < 127) { // emit 'shift' bits out and renormalize
- const int shift = kNorm[bw->range_];
- bw->range_ = kNewRange[bw->range_];
- bw->value_ <<= shift;
- bw->nb_bits_ += shift;
- if (bw->nb_bits_ > 0) Flush(bw);
- }
- return bit;
-}
-
-int VP8PutBitUniform(VP8BitWriter* const bw, int bit) {
- const int split = bw->range_ >> 1;
- if (bit) {
- bw->value_ += split + 1;
- bw->range_ -= split + 1;
- } else {
- bw->range_ = split;
- }
- if (bw->range_ < 127) {
- bw->range_ = kNewRange[bw->range_];
- bw->value_ <<= 1;
- bw->nb_bits_ += 1;
- if (bw->nb_bits_ > 0) Flush(bw);
- }
- return bit;
-}
-
-void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits) {
- int mask;
- for (mask = 1 << (nb_bits - 1); mask; mask >>= 1)
- VP8PutBitUniform(bw, value & mask);
-}
-
-void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits) {
- if (!VP8PutBitUniform(bw, value != 0))
- return;
- if (value < 0) {
- VP8PutValue(bw, ((-value) << 1) | 1, nb_bits + 1);
- } else {
- VP8PutValue(bw, value << 1, nb_bits + 1);
- }
-}
-
-//------------------------------------------------------------------------------
-
-int VP8BitWriterInit(VP8BitWriter* const bw, size_t expected_size) {
- bw->range_ = 255 - 1;
- bw->value_ = 0;
- bw->run_ = 0;
- bw->nb_bits_ = -8;
- bw->pos_ = 0;
- bw->max_pos_ = 0;
- bw->error_ = 0;
- bw->buf_ = NULL;
- return (expected_size > 0) ? BitWriterResize(bw, expected_size) : 1;
-}
-
-uint8_t* VP8BitWriterFinish(VP8BitWriter* const bw) {
- VP8PutValue(bw, 0, 9 - bw->nb_bits_);
- bw->nb_bits_ = 0; // pad with zeroes
- Flush(bw);
- return bw->buf_;
-}
-
-int VP8BitWriterAppend(VP8BitWriter* const bw,
- const uint8_t* data, size_t size) {
- assert(data != NULL);
- if (bw->nb_bits_ != -8) return 0; // Flush() must have been called
- if (!BitWriterResize(bw, size)) return 0;
- memcpy(bw->buf_ + bw->pos_, data, size);
- bw->pos_ += size;
- return 1;
-}
-
-void VP8BitWriterWipeOut(VP8BitWriter* const bw) {
- if (bw != NULL) {
- WebPSafeFree(bw->buf_);
- memset(bw, 0, sizeof(*bw));
- }
-}
-
-//------------------------------------------------------------------------------
-// VP8LBitWriter
-
-// This is the minimum amount of size the memory buffer is guaranteed to grow
-// when extra space is needed.
-#define MIN_EXTRA_SIZE (32768ULL)
-
-#define VP8L_WRITER_BYTES ((int)sizeof(vp8l_wtype_t))
-#define VP8L_WRITER_BITS (VP8L_WRITER_BYTES * 8)
-#define VP8L_WRITER_MAX_BITS (8 * (int)sizeof(vp8l_atype_t))
-
-// Returns 1 on success.
-static int VP8LBitWriterResize(VP8LBitWriter* const bw, size_t extra_size) {
- uint8_t* allocated_buf;
- size_t allocated_size;
- const size_t max_bytes = bw->end_ - bw->buf_;
- const size_t current_size = bw->cur_ - bw->buf_;
- const uint64_t size_required_64b = (uint64_t)current_size + extra_size;
- const size_t size_required = (size_t)size_required_64b;
- if (size_required != size_required_64b) {
- bw->error_ = 1;
- return 0;
- }
- if (max_bytes > 0 && size_required <= max_bytes) return 1;
- allocated_size = (3 * max_bytes) >> 1;
- if (allocated_size < size_required) allocated_size = size_required;
- // make allocated size multiple of 1k
- allocated_size = (((allocated_size >> 10) + 1) << 10);
- allocated_buf = (uint8_t*)WebPSafeMalloc(1ULL, allocated_size);
- if (allocated_buf == NULL) {
- bw->error_ = 1;
- return 0;
- }
- if (current_size > 0) {
- memcpy(allocated_buf, bw->buf_, current_size);
- }
- WebPSafeFree(bw->buf_);
- bw->buf_ = allocated_buf;
- bw->cur_ = bw->buf_ + current_size;
- bw->end_ = bw->buf_ + allocated_size;
- return 1;
-}
-
-int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size) {
- memset(bw, 0, sizeof(*bw));
- return VP8LBitWriterResize(bw, expected_size);
-}
-
-void VP8LBitWriterDestroy(VP8LBitWriter* const bw) {
- if (bw != NULL) {
- WebPSafeFree(bw->buf_);
- memset(bw, 0, sizeof(*bw));
- }
-}
-
-void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits) {
- assert(n_bits <= 32);
- // That's the max we can handle:
- assert(bw->used_ + n_bits <= 2 * VP8L_WRITER_MAX_BITS);
- if (n_bits > 0) {
- // Local field copy.
- vp8l_atype_t lbits = bw->bits_;
- int used = bw->used_;
- // Special case of overflow handling for 32bit accumulator (2-steps flush).
- if (VP8L_WRITER_BITS == 16) {
- if (used + n_bits >= VP8L_WRITER_MAX_BITS) {
- // Fill up all the VP8L_WRITER_MAX_BITS so it can be flushed out below.
- const int shift = VP8L_WRITER_MAX_BITS - used;
- lbits |= (vp8l_atype_t)bits << used;
- used = VP8L_WRITER_MAX_BITS;
- n_bits -= shift;
- bits >>= shift;
- assert(n_bits <= VP8L_WRITER_MAX_BITS);
- }
- }
- // If needed, make some room by flushing some bits out.
- while (used >= VP8L_WRITER_BITS) {
- if (bw->cur_ + VP8L_WRITER_BYTES > bw->end_) {
- const uint64_t extra_size = (bw->end_ - bw->buf_) + MIN_EXTRA_SIZE;
- if (extra_size != (size_t)extra_size ||
- !VP8LBitWriterResize(bw, (size_t)extra_size)) {
- bw->cur_ = bw->buf_;
- bw->error_ = 1;
- return;
- }
- }
- *(vp8l_wtype_t*)bw->cur_ = (vp8l_wtype_t)WSWAP((vp8l_wtype_t)lbits);
- bw->cur_ += VP8L_WRITER_BYTES;
- lbits >>= VP8L_WRITER_BITS;
- used -= VP8L_WRITER_BITS;
- }
- // Eventually, insert new bits.
- bw->bits_ = lbits | ((vp8l_atype_t)bits << used);
- bw->used_ = used + n_bits;
- }
-}
-
-uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw) {
- // flush leftover bits
- if (VP8LBitWriterResize(bw, (bw->used_ + 7) >> 3)) {
- while (bw->used_ > 0) {
- *bw->cur_++ = (uint8_t)bw->bits_;
- bw->bits_ >>= 8;
- bw->used_ -= 8;
- }
- bw->used_ = 0;
- }
- return bw->buf_;
-}
-
-//------------------------------------------------------------------------------
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