1995-02-14 08:32:41 +00:00
|
|
|
The audio part of the MPEG standard specifies three layers, whereat each
|
|
|
|
|
layer specifies its own file format. All three layers are using similar
|
|
|
|
|
audio coding techniques, but they vary in efficiency and complexity.
|
|
|
|
|
Layer I needs the fewest calculation time for en-/decoding a stream, layer III
|
|
|
|
|
the most. But a layer I MPEG audio stream is bigger than a layer III stream
|
|
|
|
|
at the same quality. This program is able to decode and play only layer I
|
|
|
|
|
and II streams, layer III is not supported (yet?!?).
|
|
|
|
|
|
1999-07-17 14:43:55 +00:00
|
|
|
The maplay decodes layer I and layer II MPEG audio streams and plays them
|
|
|
|
|
using a CD-quality audio device or sends the to stdout normally as 16 bit
|
|
|
|
|
signed PCM values, interleaved for stereo streams.
|
1995-02-14 08:32:41 +00:00
|
|
|
|
1999-07-17 14:43:55 +00:00
|
|
|
This player supports all modes, which are single channel, stereo,
|
1995-02-14 08:32:41 +00:00
|
|
|
joint stereo and dual channel, and all bitrates except free mode.
|
|
|
|
|
The missing free mode support should not be a problem for now,
|
|
|
|
|
because I haven't seen such a stream yet.
|
