mad-dev January 2009

mad-dev@lists.mars.org

3 participants
3 discussions

About one application for decoder design
by leon deng 22 Jan '09

22 Jan '09

Hi,all How are you? I found a source code for mp3 decorder using libmad library. It is called MADAudioFormatReader. if you do not know, it is not a big deal. In this code, It can handle the stereo (2 channles )mp3 file, However, it can not handle single channel mp3 file. What's the decorder difference between one channel and two channels mp3 file? I do not think there is a big difference. I think the key is to know the structure in data chunks for both case and use the right function in MAD. Am I right? Could you give me some clue? I attach the file to this email for reference. Best Leon

1 0

About Xing VBR tag data
by leon deng 14 Jan '09

14 Jan '09

Hi ,all I am new to MAD. I got confused about XING tag. Is XING also a mp3 encoder? or XING is Tag in the mp3 format. If it is the later case, in the encoder side, we can put the size of the data in XING tag, and we can get the size of the file in XING tag in the decoder side. Because, we do not want to calculate the data size,and want to get the data size in XING tag. I also found XING is also a mp3 encoder on website. So could you tell me what the XING is ?

2 1

How to achieve mp3 streaming using MAD?
by leon deng 13 Jan '09

13 Jan '09

Hi,all I want to find some mp3 headers, such as XING header,which can provide the duration information(total play time). I want to make use of it to achieve mp3 streaming support in libmad. So there are two questions. 1.I wrote a mp3 header reader, and it reads headers in the first 10 frames. I only read first 4 bytes for each frame. where is XING duration field located, or could you provide some header documentation for XING header to me? 2. Could you please tell me some other headers which can provide duration information in it? Best, Leon

2 1

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

mad-dev January 2009