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/*
* Copyright (c) 2015 The WebRTC 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 MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
#define MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
#include <stdint.h>
#include <stdio.h>
namespace webrtc {
namespace vp8 {
typedef struct VP8BitReader VP8BitReader;
struct VP8BitReader {
// Boolean decoder.
uint32_t value_; // Current value (2 bytes).
uint32_t range_; // Current range (always in [128..255] interval).
int bits_; // Number of bits shifted out of value, at most 7.
// Read buffer.
const uint8_t* buf_; // Next byte to be read.
const uint8_t* buf_end_; // End of read buffer.
};
// Gets the QP, QP range: [0, 127].
// Returns true on success, false otherwise.
bool GetQp(const uint8_t* buf, size_t length, int* qp);
} // namespace vp8
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
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