/* 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.
*/
// Example with the possibilty to call MediaInfo library with:
// - a file name
// - a buffer
// - data is from a RandomAccessFile object (local file)
// - data is from a FileUrl object (an URL, HTTP or HTTPS)
// - without authentication
// - with Amazon S3 authentication (input format is in the form "https://AWSAccessKeyId:AWSSecretAccessKey@s3.amazonaws.com/bucketname/filename"
// For "By buffer" interface, example from a file
import java.io.RandomAccessFile;
// For "By buffer" interface, example from an URL
import java.net.URL;
import java.net.HttpURLConnection;
import java.io.InputStream;
// For "By buffer" interface, example from an URL and with Amazon S3 authentication
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.security.SignatureException;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
class HowToUse_Dll
{
public static void main(String... args) throws Exception
{
String FileName = "Example.ogg";
if (args.length > 0)
FileName = args[0];
//Comment this line and uncomment the next one if you would like to test the "by buffer" interface
if (false)
//if (true)
{
if (FileName.startsWith("http://") || FileName.startsWith("https://"))
ByBuffer_URL (FileName);
else
ByBuffer_LocalFile (FileName);
}
else
ByFileName (FileName);
}
private static void ByFileName(String FileName) throws Exception
{
String To_Display = "";
//Info about the library
To_Display += MediaInfo.Option_Static("Info_Version");
To_Display += "\r\n\r\nInfo_Parameters\r\n";
To_Display += MediaInfo.Option_Static("Info_Parameters");
To_Display += "\r\n\r\nInfo_Capacities\r\n";
To_Display += MediaInfo.Option_Static("Info_Capacities");
To_Display += "\r\n\r\nInfo_Codecs\r\n";
To_Display += MediaInfo.Option_Static("Info_Codecs");
//An example of how to use the library
MediaInfo MI = new MediaInfo();
To_Display += "\r\n\r\nOpen\r\n";
if (MI.Open(FileName)>0)
To_Display+="is OK\r\n";
else
To_Display+="has a problem\r\n";
To_Display += "\r\n\r\nInform with Complete=false\r\n";
MI.Option("Complete", "");
To_Display += MI.Inform();
To_Display += "\r\n\r\nInform with Complete=true\r\n";
MI.Option("Complete", "1");
To_Display += MI.Inform();
To_Display += "\r\n\r\nCustom Inform\r\n";
MI.Option("Inform", "General;Example : FileSize=%FileSize%");
To_Display += MI.Inform();
To_Display += "\r\n\r\nGetI with Stream=General and Parameter=2\r\n";
To_Display += MI.Get(MediaInfo.StreamKind.General, 0, 2, MediaInfo.InfoKind.Text);
To_Display += "\r\n\r\nCount_Get with StreamKind=Stream_Audio\r\n";
To_Display += MI.Count_Get(MediaInfo.StreamKind.Audio, -1);
To_Display += "\r\n\r\nGet with Stream=General and Parameter=\"AudioCount\"\r\n";
To_Display += MI.Get(MediaInfo.StreamKind.General, 0, "AudioCount", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
To_Display += "\r\n\r\nGet with Stream=Audio and Parameter=\"StreamCount\"\r\n";
To_Display += MI.Get(MediaInfo.StreamKind.Audio, 0, "StreamCount", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
To_Display += "\r\n\r\nGet with Stream=General and Parameter=\"FileSize\"\r\n";
To_Display += MI.Get(MediaInfo.StreamKind.General, 0, "FileSize", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
To_Display += "\r\n\r\nClose\r\n";
MI.Close();
System.out.println(To_Display);
}
private static void ByBuffer_LocalFile(String FileName) throws Exception
{
FileName=FileName.replace(" ", "%20");
//Initializing MediaInfo
MediaInfo MI = new MediaInfo();
//From: preparing an example file for reading
RandomAccessFile From = new RandomAccessFile(FileName, "r"); //From file
//From: preparing a memory buffer for reading
byte[] From_Buffer = new byte[64*1024];
int From_Buffer_Size; //The size of the read file buffer
//Preparing to fill MediaInfo with a buffer
MI.Open_Buffer_Init(From.length(), 0);
//The parsing loop
do
{
//Reading data somewhere, do what you want for this.
From_Buffer_Size = From.read(From_Buffer);
//Sending the buffer to MediaInfo
int Result = MI.Open_Buffer_Continue(From_Buffer, From_Buffer_Size);
if ((Result & 8) == 8) // Status.Finalized
break;
//Testing if MediaInfo request to go elsewhere
if (MI.Open_Buffer_Continue_GoTo_Get() != -1)
{
long newPos = MI.Open_Buffer_Continue_GoTo_Get();
From.seek(newPos); //Position the file
MI.Open_Buffer_Init(From.length(), newPos); //Informing MediaInfo we have seek
}
}
while (From_Buffer_Size > 0);
//Finalizing
MI.Open_Buffer_Finalize(); //This is the end of the stream, MediaInfo must finnish some work
//Get() example
String To_Display = new String();
To_Display += "Get with Stream=General and Parameter=\"Format\": ";
To_Display += MI.Get(MediaInfo.StreamKind.General, 0, "Format", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
To_Display += "\r\n";
To_Display += "Get with Stream=Video and Parameter=\"Format_Settings_GOP\": ";
To_Display += MI.Get(MediaInfo.StreamKind.Video, 0, "Format_Settings_GOP", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
System.out.println(To_Display);
}
private static void ByBuffer_URL(String FileName) throws Exception
{
String Amazon_S3_Date = new String(); // Amazon only
String Amazon_S3_Authorization = new String(); // Amazon only
// Parsing user input
FileName = FileName.replace(" ", "%20");
int FileName_Amazon_S3_End = FileName.indexOf("@s3.amazonaws.com/"); //Testing if Amazon is used and a AccessKeyId/SecretAccessKey is provided, TODO: use a less ugly method
if (FileName_Amazon_S3_End != -1)
{
// Amazon only, computing the Authorization value
// See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html
int FileName_Amazon_S3_Begin = FileName.indexOf("://") + 3;
int FileName_Amazon_S3_Middle = FileName.indexOf(":", FileName_Amazon_S3_Begin);
String Amazon_S3_AWSAccessKeyId = FileName.substring(FileName_Amazon_S3_Begin, FileName_Amazon_S3_Middle);
String Amazon_S3_AWSSecretAccessKey = FileName.substring(FileName_Amazon_S3_Middle + 1, FileName_Amazon_S3_End);
FileName = FileName.replace(FileName.substring(FileName_Amazon_S3_Begin, FileName_Amazon_S3_End + 1), new String());
Amazon_S3_Date = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z", Locale.US).format(new Date());
String Amazon_S3_ToSign = "GET\n\n\n"+Amazon_S3_Date+"\n"+new URL(FileName).getPath();
Amazon_S3_Authorization = "AWS "+Amazon_S3_AWSAccessKeyId+":"+calculateHmacSHA1(Amazon_S3_ToSign, Amazon_S3_AWSSecretAccessKey);
}
URL FileUrl = new URL(FileName);
//From: preparing an example file for reading
HttpURLConnection HttpFrom = (HttpURLConnection ) FileUrl.openConnection();
if (!Amazon_S3_Authorization.isEmpty())
{
HttpFrom.setRequestProperty("Date", Amazon_S3_Date); // Amazon only
HttpFrom.setRequestProperty("Authorization", Amazon_S3_Authorization); // Amazon only
}
HttpFrom.connect();
if (HttpFrom.getResponseCode() != 200)
{
java.util.Scanner S = new java.util.Scanner(HttpFrom.getErrorStream());
S.useDelimiter("\\Z");
System.out.println(S.next());
return;
}
InputStream From = HttpFrom.getInputStream();
long From_Length = Long.parseLong(HttpFrom.getHeaderField("Content-Length")); //.getContentLengthLong(), for 2GB+ file support is available only in Java 7 and lot of distros have Java 6
//From: preparing a memory buffer for reading
byte[] From_Buffer = new byte[64*1024];
int From_Buffer_Size; //The size of the read file buffer
//Initializing MediaInfo
MediaInfo MI = new MediaInfo();
//Preparing to fill MediaInfo with a buffer
MI.Open_Buffer_Init(From_Length, 0);
//The parsing loop
do
{
//Reading data somewhere, do what you want for this.
From_Buffer_Size = From.read(From_Buffer);
//Sending the buffer to MediaInfo
int Result = MI.Open_Buffer_Continue(From_Buffer, From_Buffer_Size);
if ((Result & 8) == 8) // Status.Finalized
break;
//Testing if MediaInfo request to go elsewhere
if (MI.Open_Buffer_Continue_GoTo_Get() != -1)
{
long newPos = MI.Open_Buffer_Continue_GoTo_Get();
From.close();
HttpFrom.disconnect();
HttpFrom = (HttpURLConnection ) FileUrl.openConnection();
if (!Amazon_S3_Authorization.isEmpty())
{
HttpFrom.setRequestProperty("Date", Amazon_S3_Date); // Amazon only
HttpFrom.setRequestProperty("Authorization", Amazon_S3_Authorization); // Amazon only
}
HttpFrom.setRequestProperty("Range", "bytes=" + newPos + "-");
HttpFrom.connect();
if (HttpFrom.getResponseCode() != 206)
{
java.util.Scanner S = new java.util.Scanner(HttpFrom.getErrorStream());
S.useDelimiter("\\Z");
System.out.println(S.next());
return;
}
From = HttpFrom.getInputStream();
MI.Open_Buffer_Init(From_Length, newPos); //Informing MediaInfo we have seek, TODO: take newPos from HTTP Content-Range value
}
}
while (From_Buffer_Size > 0);
//Finalizing
MI.Open_Buffer_Finalize(); //This is the end of the stream, MediaInfo must finish some work
//Get() example
String To_Display = new String();
To_Display += "Get with Stream=General and Parameter=\"Format\": ";
To_Display += MI.Get(MediaInfo.StreamKind.General, 0, "Format", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
To_Display += "\r\n";
To_Display += "Get with Stream=Video and Parameter=\"Format_Settings_GOP\": ";
To_Display += MI.Get(MediaInfo.StreamKind.Video, 0, "Format_Settings_GOP", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);
System.out.println(To_Display);
}
/**
* Computes HMAC signature.
* @param data The data to be signed.
* @param secretKey The signing secret key.
* @return The Base64-encoded HMAC signature.
* @throws java.security.SignatureException when signature generation fails
*/
private static String calculateHmacSHA1(String data, String secretKey)
throws java.security.SignatureException
{
String Result;
try
{
Mac mac = Mac.getInstance("HmacSHA1"); // Create an HMAC instance
mac.init(new SecretKeySpec(secretKey.getBytes(), "HmacSHA1")); // Initialize the HMAC instance with the secret key
Result = DatatypeConverter.printBase64Binary(mac.doFinal(data.getBytes()));
}
catch (Exception e)
{
throw new SignatureException(e.getMessage());
}
return Result;
}
}
