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@provegard
Last active Dec 21, 2015
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MediaInfo buffer usage
/* Copyright (c) MediaArea.net SARL. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license that can
* be found in the License.html file in the root of the source tree.
*/
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Linux: g++ -o howtouse HowToUse_Dll.cpp -lmediainfo -lzen -ldl
// Windows: cl /Fehowtouse.exe HowToUse_Dll.cpp
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#ifdef MEDIAINFO_LIBRARY
#include "MediaInfo/MediaInfo.h" //Staticly-loaded library (.lib or .a or .so)
#define MediaInfoNameSpace MediaInfoLib;
#else //MEDIAINFO_LIBRARY
#include "MediaInfoDLL/MediaInfoDLL.h" //Dynamicly-loaded library (.dll or .so)
#define MediaInfoNameSpace MediaInfoDLL;
#endif //MEDIAINFO_LIBRARY
#include <iostream>
#include <iomanip>
using namespace MediaInfoNameSpace;
#ifdef __MINGW32__
#ifdef _UNICODE
#define _itot _itow
#else //_UNICODE
#define _itot itoa
#endif //_UNICODE
#endif //__MINGW32
//***************************************************************************
// By buffer example
//***************************************************************************
//---------------------------------------------------------------------------
//Note: you can replace file operations by your own buffer management class
#include <stdio.h>
int main (int argc, Char *argv[])
{
//From: preparing an example file for reading
FILE* F=fopen("test2.mov", "rb"); //You can use something else than a file
if (F==0)
return 1;
//From: preparing a memory buffer for reading
unsigned char* From_Buffer=new unsigned char[7*188]; //Note: you can do your own buffer
size_t From_Buffer_Size; //The size of the read file buffer
//From: retrieving file size
fseek(F, 0, SEEK_END);
long F_Size=ftell(F);
fseek(F, 0, SEEK_SET);
//Initializing MediaInfo
MediaInfo MI;
MI.Option(__T("ParseSpeed"), __T("0"));
//Preparing to fill MediaInfo with a buffer
MI.Open_Buffer_Init(F_Size, 0);
//The parsing loop
int totalRead = 0;
do
{
//Reading data somewhere, do what you want for this.
From_Buffer_Size=fread(From_Buffer, 1, 7*188, F);
totalRead += From_Buffer_Size;
printf("Read %ld bytes.\n", From_Buffer_Size);
//Sending the buffer to MediaInfo
size_t Status=MI.Open_Buffer_Continue(From_Buffer, From_Buffer_Size);
if (Status&0x08) //Bit3=Finished
break;
//Testing if there is a MediaInfo request to go elsewhere
MediaInfo_int64u seekPos = MI.Open_Buffer_Continue_GoTo_Get();
if (seekPos!=(MediaInfo_int64u)-1)
{
printf("Seeking to offset %lld.", seekPos);
fseek(F, (long)seekPos, SEEK_SET); //Position the file
MI.Open_Buffer_Init(F_Size, ftell(F)); //Informing MediaInfo we have seek
}
}
while (From_Buffer_Size>0);
printf("Done, read %d bytes in total.\n", totalRead);
//Finalizing
MI.Open_Buffer_Finalize(); //This is the end of the stream, MediaInfo must finnish some work
//Get() example
String To_Display=MI.Get(Stream_General, 0, __T("Format"));
#ifdef _UNICODE
std::wcout << To_Display << std::endl;
#else
std::cout << To_Display << std::endl;
#endif
}
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