• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Tim Cooke
  • Devaka Cooray
  • Ron McLeod
  • Jeanne Boyarsky
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
  • Tim Holloway
Bartenders:
  • Martijn Verburg
  • Frits Walraven
  • Himai Minh

bytes to double

 
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I have a byte[]; these bytes represent audio samples with tipically 8 or 16 bits per samples and big or little endian order.
How can I get the original double (float) values of the samples?

I am a beginner in Java so I posted this here. I hope it's the right section!
 
author
Posts: 23928
142
jQuery Eclipse IDE Firefox Browser VI Editor C++ Chrome Java Linux Windows
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Well, if these bytes conform to the standard IEEE 754 floating point format, you can easily transfer the bits to float or double. Either...

1. Using the java.lang.Float and java.lang.Double class that has methods to take bits from ints or longs to floats or doubles. So you can use the shifting and AND operators to get the bytes into place and then use those methods.

2. Or you can use the java.nio.ByteBuffer class, which has methods that does what you want -- including taking care of the Big or Little Endian.

Of course, this all assumes that the bytes conform to the floating point standard.

Henry

 
Antonio Manes
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks for your help! I will try it soon.
 
Willie Smits increased rainfall 25% in three years by planting trees. Tiny ad:
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic