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Diffstat (limited to 'src/main/jni/libwebp/utils/bit_writer.h')
-rw-r--r-- | src/main/jni/libwebp/utils/bit_writer.h | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/src/main/jni/libwebp/utils/bit_writer.h b/src/main/jni/libwebp/utils/bit_writer.h deleted file mode 100644 index c80d22ae9..000000000 --- a/src/main/jni/libwebp/utils/bit_writer.h +++ /dev/null @@ -1,120 +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) - -#ifndef WEBP_UTILS_BIT_WRITER_H_ -#define WEBP_UTILS_BIT_WRITER_H_ - -#include "../webp/types.h" - -#ifdef __cplusplus -extern "C" { -#endif - -//------------------------------------------------------------------------------ -// Bit-writing - -typedef struct VP8BitWriter VP8BitWriter; -struct VP8BitWriter { - int32_t range_; // range-1 - int32_t value_; - int run_; // number of outstanding bits - int nb_bits_; // number of pending bits - uint8_t* buf_; // internal buffer. Re-allocated regularly. Not owned. - size_t pos_; - size_t max_pos_; - int error_; // true in case of error -}; - -// Initialize the object. Allocates some initial memory based on expected_size. -int VP8BitWriterInit(VP8BitWriter* const bw, size_t expected_size); -// Finalize the bitstream coding. Returns a pointer to the internal buffer. -uint8_t* VP8BitWriterFinish(VP8BitWriter* const bw); -// Release any pending memory and zeroes the object. Not a mandatory call. -// Only useful in case of error, when the internal buffer hasn't been grabbed! -void VP8BitWriterWipeOut(VP8BitWriter* const bw); - -int VP8PutBit(VP8BitWriter* const bw, int bit, int prob); -int VP8PutBitUniform(VP8BitWriter* const bw, int bit); -void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits); -void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits); - -// Appends some bytes to the internal buffer. Data is copied. -int VP8BitWriterAppend(VP8BitWriter* const bw, - const uint8_t* data, size_t size); - -// return approximate write position (in bits) -static WEBP_INLINE uint64_t VP8BitWriterPos(const VP8BitWriter* const bw) { - return (uint64_t)(bw->pos_ + bw->run_) * 8 + 8 + bw->nb_bits_; -} - -// Returns a pointer to the internal buffer. -static WEBP_INLINE uint8_t* VP8BitWriterBuf(const VP8BitWriter* const bw) { - return bw->buf_; -} -// Returns the size of the internal buffer. -static WEBP_INLINE size_t VP8BitWriterSize(const VP8BitWriter* const bw) { - return bw->pos_; -} - -//------------------------------------------------------------------------------ -// VP8LBitWriter - -#if defined(__x86_64__) || defined(_M_X64) // 64bit -typedef uint64_t vp8l_atype_t; // accumulator type -typedef uint32_t vp8l_wtype_t; // writing type -#define WSWAP HToLE32 -#else -typedef uint32_t vp8l_atype_t; -typedef uint16_t vp8l_wtype_t; -#define WSWAP HToLE16 -#endif - -typedef struct { - vp8l_atype_t bits_; // bit accumulator - int used_; // number of bits used in accumulator - uint8_t* buf_; // start of buffer - uint8_t* cur_; // current write position - uint8_t* end_; // end of buffer - - // After all bits are written (VP8LBitWriterFinish()), the caller must observe - // the state of error_. A value of 1 indicates that a memory allocation - // failure has happened during bit writing. A value of 0 indicates successful - // writing of bits. - int error_; -} VP8LBitWriter; - -static WEBP_INLINE size_t VP8LBitWriterNumBytes(VP8LBitWriter* const bw) { - return (bw->cur_ - bw->buf_) + ((bw->used_ + 7) >> 3); -} - -uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw); - -// Returns 0 in case of memory allocation error. -int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size); - -void VP8LBitWriterDestroy(VP8LBitWriter* const bw); - -// This function writes bits into bytes in increasing addresses (little endian), -// and within a byte least-significant-bit first. -// This function can write up to 32 bits in one go, but VP8LBitReader can only -// read 24 bits max (VP8L_MAX_NUM_BIT_READ). -// VP8LBitWriter's error_ flag is set in case of memory allocation error. -void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits); - -//------------------------------------------------------------------------------ - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif /* WEBP_UTILS_BIT_WRITER_H_ */ |