libavutil_adler32.go

// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
// sms10086@hotmail.com

/*
 * copyright (c) 2006 Mans Rullgard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

package ffmpeg

//#cgo pkg-config: libavutil
//#include <stdint.h>
//#include "libavutil/attributes.h"
//#include "libavutil/adler32.h"
import "C"
import (
    "unsafe"
)




/**
 * @file
 * @ingroup lavu_adler32
 * Public header for Adler-32 hash function implementation.
 */

                        
                        

                   
                       

/**
 * @defgroup lavu_adler32 Adler-32
 * @ingroup lavu_hash
 * Adler-32 hash function implementation.
 *
 * @{
 */

/**
 * Calculate the Adler32 checksum of a buffer.
 *
 * Passing the return value to a subsequent av_adler32_update() call
 * allows the checksum of multiple buffers to be calculated as though
 * they were concatenated.
 *
 * @param adler initial checksum value
 * @param buf   pointer to input buffer
 * @param len   size of input buffer
 * @return      updated checksum
 */
func Av_adler32_update(adler uint32, buf *uint8,
                                len uint32)  uint32 {
    return uint32(C.av_adler32_update(C.ulong(adler), 
        (*C.uchar)(unsafe.Pointer(buf)), C.uint(len)))
}

/**
 * @}
 */