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/*
* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE 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.
*/
#ifndef VP9_BIT_WRITE_BUFFER_H_
#define VP9_BIT_WRITE_BUFFER_H_
#include "vpx/vpx_integer.h"
struct vp9_write_bit_buffer {
uint8_t *const bit_buffer;
size_t bit_offset;
};
static void vp9_wb_write_bit(struct vp9_write_bit_buffer *wb, int bit) {
const int off = wb->bit_offset;
const int p = off / CHAR_BIT;
const int q = /*CHAR_BIT - 1 -*/ off % CHAR_BIT;
wb->bit_buffer[p] &= ~(1 << q);
wb->bit_buffer[p] |= bit << q;
wb->bit_offset = off + 1;
}
static void vp9_wb_write_literal(struct vp9_write_bit_buffer *wb,
int data, int bits) {
int bit;
for (bit = bits - 1; bit >= 0; bit--)
vp9_wb_write_bit(wb, (data >> bit) & 1);
}
#endif // VP9_BIT_WRITE_BUFFER_H_
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