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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 VPX_VPX_DSP_BITWRITER_BUFFER_H_
#define VPX_VPX_DSP_BITWRITER_BUFFER_H_
#include "vpx/vpx_integer.h"
#ifdef __cplusplus
extern "C" {
#endif
struct vpx_write_bit_buffer {
// Whether there has been an error.
int error;
// We maintain the invariant that bit_offset <= size * CHAR_BIT, i.e., we
// never write beyond the end of bit_buffer. If bit_offset would be
// incremented to be greater than size * CHAR_BIT, leave bit_offset unchanged
// and set error to 1.
size_t bit_offset;
// Size of bit_buffer in bytes.
size_t size;
uint8_t *bit_buffer;
};
void vpx_wb_init(struct vpx_write_bit_buffer *wb, uint8_t *bit_buffer,
size_t size);
int vpx_wb_has_error(const struct vpx_write_bit_buffer *wb);
// Must not be called if vpx_wb_has_error(wb) returns true.
size_t vpx_wb_bytes_written(const struct vpx_write_bit_buffer *wb);
void vpx_wb_write_bit(struct vpx_write_bit_buffer *wb, int bit);
void vpx_wb_write_literal(struct vpx_write_bit_buffer *wb, int data, int bits);
void vpx_wb_write_inv_signed_literal(struct vpx_write_bit_buffer *wb, int data,
int bits);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VPX_VPX_DSP_BITWRITER_BUFFER_H_