64 lines
2.7 KiB
Plaintext
64 lines
2.7 KiB
Plaintext
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We badly need:
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- header reorganization (lots of stuff don't belong to mpg123.h)
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- integer type safety - STOP using ints where size_t or at least long would be appropriate (expecially stream readers)
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- sprintf -> snprintf (maybe with switch to support ancient libc; or replacement by us)
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- rewrite httpget.c; that thing has been a can of bugs for years and I understand why when I look at it (way too many cooks)
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- really parse ID3V2 tags instead of skipping; done for RVA values... using the string info (just?) needs some Unicode/Locale handling
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- check support for fixed point arithmentic; generic_nofpu seems wo work generally, but resampling does not sound nice
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From Nicholas:
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- Seperate out MPEG Audio decoder (only) into seperate library
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- Allow choice of audio output at runtime, rather than compile time
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- Choose processor optimization at runtime, rather than compile time?
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From Michael (some time after/around pre-0.59s):
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- add CRC check.
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- add 'free format stream' support.
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- optimize layer2.c:
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step_two: fraction as pointer ..
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process first channel 0 than channel 1
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copy channel 0 to channel 1 for: i >= jsbound
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- better frame reader .. especially for layer 3 - DONE by a good deal by Thomas
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- MPEG system stream decoder
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- check again layer1 !! (Layer-1 support not heavily tested ..)
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Problems with Layer1 fl7 reference stream
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- Write a special (optimized) 'single channel' decode.
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- optimized dct64 for down sampling modes
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- native audio support for AIX and DEC
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- update manpage
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- optimizations for downsampling modes on layer2 and layer1
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MORE TODO: (partially done)
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---------------------------
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A few notes on how mpg123 tries to select a 'good'
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audio encoding and frequency. (not full implemented yet!!)
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- mpg123 tries to set the settings you specify on the command line
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in the order of its appearence (exclusiv .. no fallback then)
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(-r <rate>, --mono, --stereo, --8bit, etc )
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- after this, mpg123 tries to set
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1. the number of channels (or fallback to mono if stereo isn't possible)
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2. the audioformat to 16 bit (or fallback to 8bit)
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3. the "best" frequency: (in this order)
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- the exact stream frequency or fallback to
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- 2:1 frequency or fallback to
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- 4:1 frequency or try the
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- nearest frequency lower than the frequency of your stream
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mpg123 automagically converts the rate.
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So, if you think (or even know), that your hardware supports a higher
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frequency only with eg. mono,8bit you must force mpg123 to play mono
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and 8bit. ("--8bit -m") etc....
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If you wanna a constant format eg to output the data to stdout you
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must explicit force it with eg: '-r 44100 --stereo'
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Else the format will be the format of the mpeg stream.
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