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-rw-r--r--third_party/libwebp/dec/bits.h107
1 files changed, 0 insertions, 107 deletions
diff --git a/third_party/libwebp/dec/bits.h b/third_party/libwebp/dec/bits.h
deleted file mode 100644
index 82e4c3a..0000000
--- a/third_party/libwebp/dec/bits.h
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2010 Google Inc.
-//
-// 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/
-// -----------------------------------------------------------------------------
-//
-// Boolean decoder
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#ifndef WEBP_DEC_BITS_H_
-#define WEBP_DEC_BITS_H_
-
-#include <assert.h>
-#include "webp/decode_vp8.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-//-----------------------------------------------------------------------------
-// Bitreader and code-tree reader
-
-typedef struct {
- const uint8_t* buf_; // next byte to be read
- const uint8_t* buf_end_; // end of read buffer
- int eof_; // true if input is exhausted
-
- // boolean decoder
- uint32_t range_; // current range minus 1. In [127, 254] interval.
- uint32_t value_; // current value
- int missing_; // number of missing bits in value_ (8bit)
-} VP8BitReader;
-
-// Initialize the bit reader and the boolean decoder.
-void VP8InitBitReader(VP8BitReader* const br,
- const uint8_t* const start, const uint8_t* const end);
-
-// return the next value made of 'num_bits' bits
-uint32_t VP8GetValue(VP8BitReader* const br, int num_bits);
-static inline uint32_t VP8Get(VP8BitReader* const br) {
- return VP8GetValue(br, 1);
-}
-
-// return the next value with sign-extension.
-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 uint8_t kVP8NewRange[128];
-static inline uint32_t VP8GetByte(VP8BitReader* const br) {
- assert(br);
- if (br->buf_ < br->buf_end_) {
- assert(br->buf_);
- return *br->buf_++;
- }
- br->eof_ = 1;
- return 0xff;
-}
-
-static inline uint32_t VP8BitUpdate(VP8BitReader* const br, uint32_t split) {
- uint32_t bit;
- // Make sure we have a least 8 bits in 'value_'
- if (br->missing_ > 0) {
- br->value_ |= VP8GetByte(br) << br->missing_;
- br->missing_ -= 8;
- }
- bit = ((br->value_ >> 8) > split);
- if (bit) {
- br->range_ -= split + 1;
- br->value_ -= (split + 1) << 8;
- } else {
- br->range_ = split;
- }
- return bit;
-}
-
-static inline void VP8Shift(VP8BitReader* const br) {
- // range_ is in [0..127] interval here.
- const int shift = kVP8Log2Range[br->range_];
- br->range_ = kVP8NewRange[br->range_];
- br->value_ <<= shift;
- br->missing_ += shift;
-}
-
-static inline uint32_t VP8GetBit(VP8BitReader* const br, int prob) {
- const uint32_t split = (br->range_ * prob) >> 8;
- const uint32_t bit = VP8BitUpdate(br, split);
- if (br->range_ < 0x7f) {
- VP8Shift(br);
- }
- return bit;
-}
-
-static inline int VP8GetSigned(VP8BitReader* const br, int v) {
- const uint32_t split = br->range_ >> 1;
- const uint32_t bit = VP8BitUpdate(br, split);
- VP8Shift(br);
- return bit ? -v : v;
-}
-
-#if defined(__cplusplus) || defined(c_plusplus)
-} // extern "C"
-#endif
-
-#endif // WEBP_DEC_BITS_H_