16ac915abcdb404a00d927fe6308a47fcf09d9519hkuang/* 26ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * Copyright (c) 2013 The WebM project authors. All Rights Reserved. 36ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * 46ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * Use of this source code is governed by a BSD-style license 56ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * that can be found in the LICENSE file in the root of the source 66ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * tree. An additional intellectual property rights grant can be found 76ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * in the file PATENTS. All contributing project authors may 86ac915abcdb404a00d927fe6308a47fcf09d9519hkuang * be found in the AUTHORS file in the root of the source tree. 96ac915abcdb404a00d927fe6308a47fcf09d9519hkuang */ 106ac915abcdb404a00d927fe6308a47fcf09d9519hkuang 116ac915abcdb404a00d927fe6308a47fcf09d9519hkuang#include "vp9/encoder/vp9_write_bit_buffer.h" 126ac915abcdb404a00d927fe6308a47fcf09d9519hkuang 136ac915abcdb404a00d927fe6308a47fcf09d9519hkuangsize_t vp9_rb_bytes_written(struct vp9_write_bit_buffer *wb) { 146ac915abcdb404a00d927fe6308a47fcf09d9519hkuang return wb->bit_offset / CHAR_BIT + (wb->bit_offset % CHAR_BIT > 0); 156ac915abcdb404a00d927fe6308a47fcf09d9519hkuang} 166ac915abcdb404a00d927fe6308a47fcf09d9519hkuang 176ac915abcdb404a00d927fe6308a47fcf09d9519hkuangvoid vp9_wb_write_bit(struct vp9_write_bit_buffer *wb, int bit) { 186ac915abcdb404a00d927fe6308a47fcf09d9519hkuang const int off = (int)wb->bit_offset; 196ac915abcdb404a00d927fe6308a47fcf09d9519hkuang const int p = off / CHAR_BIT; 206ac915abcdb404a00d927fe6308a47fcf09d9519hkuang const int q = CHAR_BIT - 1 - off % CHAR_BIT; 216ac915abcdb404a00d927fe6308a47fcf09d9519hkuang if (q == CHAR_BIT -1) { 226ac915abcdb404a00d927fe6308a47fcf09d9519hkuang wb->bit_buffer[p] = bit << q; 236ac915abcdb404a00d927fe6308a47fcf09d9519hkuang } else { 246ac915abcdb404a00d927fe6308a47fcf09d9519hkuang wb->bit_buffer[p] &= ~(1 << q); 256ac915abcdb404a00d927fe6308a47fcf09d9519hkuang wb->bit_buffer[p] |= bit << q; 266ac915abcdb404a00d927fe6308a47fcf09d9519hkuang } 276ac915abcdb404a00d927fe6308a47fcf09d9519hkuang wb->bit_offset = off + 1; 286ac915abcdb404a00d927fe6308a47fcf09d9519hkuang} 296ac915abcdb404a00d927fe6308a47fcf09d9519hkuang 306ac915abcdb404a00d927fe6308a47fcf09d9519hkuangvoid vp9_wb_write_literal(struct vp9_write_bit_buffer *wb, int data, int bits) { 316ac915abcdb404a00d927fe6308a47fcf09d9519hkuang int bit; 326ac915abcdb404a00d927fe6308a47fcf09d9519hkuang for (bit = bits - 1; bit >= 0; bit--) 336ac915abcdb404a00d927fe6308a47fcf09d9519hkuang vp9_wb_write_bit(wb, (data >> bit) & 1); 346ac915abcdb404a00d927fe6308a47fcf09d9519hkuang} 35