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Viewing changes to src/libFLAC/include/private/lpc.h

  • Committer: Bazaar Package Importer
  • Author(s): Joshua Kwan
  • Date: 2007-05-29 22:56:36 UTC
  • mfrom: (1.1.4 upstream)
  • Revision ID: james.westby@ubuntu.com-20070529225636-ljeff8xxip09qaap
Tags: 1.1.4-1
http://bugs.debian.org/405167
http://bugs.debian.org/411311
* New upstream release. closes: #405167, #411311
  - libOggFLAC and libOggFLAC++ have been merged into libFLAC, so
    remove their corresponding packages.
  - Because of the API changes required to effect the above, there has
    been yet another soname bump. libflac7 -> libflac8 and
    libflac++5 -> libflac++6. Emails have been dispatched to the
    maintainers of dependent packages.
* Some notes on patches that were removed:
  - 02_stdin_stdout, 06_manpage_mention_utf8_convert: merged upstream
  - 08_manpage_warnings: Upstream has changed the manpage so it defintely
    can't fit in in 80 cols, so just forget about it. We'll live.
  - 05_eof_warnings_are_errors: Upstream decided to add a -w option to
    flac to treat all warnings as errors. I am going to defer to that
    for now, but if people think it's stupid let me know and I'll port
    the patch forward.
  - 04_stack_smasher: was a backport from 1.1.3, so it's obsolete.

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src/libFLAC/include/private/lpc.h
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/* libFLAC - Free Lossless Audio Codec library
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 * Copyright (C) 2000,2001,2002,2003,2004,2005  Josh Coalson
 
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 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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#ifndef FLAC__INTEGER_ONLY_LIBRARY
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/*
 
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 *      FLAC__lpc_window_data()
 
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 *      --------------------------------------------------------------------
 
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 *      Applies the given window to the data.
 
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 *  OPT: asm implementation
 
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 *
 
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 *      IN in[0,data_len-1]
 
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 *      IN window[0,data_len-1]
 
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 *      OUT out[0,lag-1]
 
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 *      IN data_len
 
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 */
 
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void FLAC__lpc_window_data(const FLAC__real in[], const FLAC__real window[], FLAC__real out[], unsigned data_len);
 
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/*
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 *      FLAC__lpc_compute_autocorrelation()
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 *      --------------------------------------------------------------------
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 *      Compute the autocorrelation for lags between 0 and lag-1.
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 *      OUT lp_coeff[0,max_order-1][0,max_order-1] LP coefficients for each order
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 *      *** IMPORTANT:
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 *      *** lp_coeff[0,max_order-1][max_order,FLAC__MAX_LPC_ORDER-1] are untouched
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 *      OUT error[0,max_order-1]                   error for each order
 
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 *      OUT error[0,max_order-1]                   error for each order (more
 
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 *                                                 specifically, the variance of
 
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 *                                                 the error signal times # of
 
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 *                                                 samples in the signal)
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 *
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 *      Example: if max_order is 9, the LP coefficients for order 9 will be
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 *               in lp_coeff[8][0,8], the LP coefficients for order 8 will be
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 *                       in lp_coeff[7][0,7], etc.
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 */
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void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], unsigned max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], FLAC__double error[]);
 
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void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], unsigned *max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], FLAC__double error[]);
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/*
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 *      FLAC__lpc_quantize_coefficients()
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 *      IN lpc_error[0,max_order-1] >= 0.0  error returned from calculating LP coefficients
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 *      IN max_order > 0                    max LP order
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 *      IN total_samples > 0                # of samples in residual signal
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 *      IN bits_per_signal_sample           # of bits per sample in the original signal
 
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 *      IN overhead_bits_per_order          # of bits overhead for each increased LP order
 
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 *                                          (includes warmup sample size and quantized LP coefficient)
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 *      RETURN [1,max_order]                best order
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 */
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unsigned FLAC__lpc_compute_best_order(const FLAC__double lpc_error[], unsigned max_order, unsigned total_samples, unsigned bits_per_signal_sample);
 
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unsigned FLAC__lpc_compute_best_order(const FLAC__double lpc_error[], unsigned max_order, unsigned total_samples, unsigned overhead_bits_per_order);
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#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
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