Hi there:
I tried to get the raw pcm data from a mp3-encoded riff wav file. Can I use the libmad to do that? I mean, except to the header of the file, is each frame header and data the same as that in the mp3 file? And where can I get such file's format description?
Thank you!
shiming
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On Jun 20, 2004, at 11:22 AM, shiming dong wrote:
I tried to get the raw pcm data from a mp3-encoded riff wav file. Can I use the libmad to do that? I mean, except to the header of the file, is each frame header and data the same as that in the mp3 file? And where can I get such file's format description?
As far as I know, an MP3-encoded WAV file is just an MP3 stream wrapped with a Microsoft RIFF header. You ought to be able to decode the MP3 stream with libmad whether or not you actually unwrap the RIFF header; libmad will seek until it finds a valid sync word marking the stream.
I don't have pointers handy for the RIFF/WAVE file format but they shouldn't be hard to locate online.
-rob
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Rob Leslie -
shiming dong