trunk/src/modules/rtp_rtcp/source/H264/bitstream_parser.h

/*
 *  Copyright (c) 2011 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_H264_BITSTREAM_PARSER_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_H264_BITSTREAM_PARSER_H_

#include "typedefs.h"

namespace webrtc {
class BitstreamParser
{
public:
    BitstreamParser(const WebRtc_UWord8* data, const WebRtc_UWord32 dataLength);

    WebRtc_UWord8 Get1Bit();
    WebRtc_UWord8 Get2Bits();
    WebRtc_UWord8 Get3Bits();
    WebRtc_UWord8 Get4Bits();
    WebRtc_UWord8 Get5Bits();
    WebRtc_UWord8 Get6Bits();
    WebRtc_UWord8 Get7Bits();
    WebRtc_UWord8 Get8Bits();
    WebRtc_UWord16 Get16Bits();
    WebRtc_UWord32 Get24Bits();
    WebRtc_UWord32 Get32Bits();

    // Exp-Golomb codes
    WebRtc_UWord32 GetUE();

private:
    const WebRtc_UWord8* _data;
    const WebRtc_UWord32 _dataLength;

    WebRtc_UWord32 _byteOffset;
    WebRtc_UWord8  _bitOffset;
};
} // namespace webrtc

#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_H264_BITSTREAM_PARSER_H_