mirror of
https://github.com/cookiengineer/audacity
synced 2025-11-04 08:04:06 +01:00
91 lines
3.6 KiB
C
91 lines
3.6 KiB
C
/*
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* TwoLAME: an optimized MPEG Audio Layer Two encoder
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*
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* Copyright (C) 2001-2004 Michael Cheng
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* Copyright (C) 2004-2006 The TwoLAME Project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id$
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*
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*/
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#ifndef _ENCODE_H_
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#define _ENCODE_H_
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int encode_init(twolame_options * glopts);
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void scalefactor_calc(FLOAT sb_sample[][3][SCALE_BLOCK][SBLIMIT],
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unsigned int scalar[][3][SBLIMIT], int nch, int sblimit);
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void combine_lr(FLOAT sb_sample[2][3][SCALE_BLOCK][SBLIMIT],
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FLOAT joint_sample[3][SCALE_BLOCK][SBLIMIT], int sblimit);
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void find_sf_max(twolame_options * glopts,
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unsigned int sf_index[2][3][SBLIMIT], FLOAT sf_max[2][SBLIMIT]);
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void sf_transmission_pattern(twolame_options * glopts,
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unsigned int sf_index[2][3][SBLIMIT],
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unsigned int sf_selectinfo[2][SBLIMIT]);
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void write_header(twolame_options * glopts, bit_stream * bs);
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void write_bit_alloc(twolame_options * glopts, unsigned int bit_alloc[2][SBLIMIT], bit_stream * bs);
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void write_scalefactors(twolame_options * glopts,
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unsigned int bit_alloc[2][SBLIMIT],
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unsigned int sf_selectinfo[2][SBLIMIT],
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unsigned int scalar[2][3][SBLIMIT], bit_stream * bs);
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void subband_quantization(twolame_options * glopts,
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unsigned int sf_index[2][3][SBLIMIT],
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FLOAT sb_samples[2][3][SCALE_BLOCK][SBLIMIT],
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unsigned int j_scale[3][SBLIMIT],
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FLOAT j_samps[3][SCALE_BLOCK][SBLIMIT],
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unsigned int bit_alloc[2][SBLIMIT],
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unsigned int sbband[2][3][SCALE_BLOCK][SBLIMIT]);
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void write_samples(twolame_options * glopts,
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unsigned int sbband[2][3][SCALE_BLOCK][SBLIMIT],
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unsigned int bit_alloc[2][SBLIMIT], bit_stream * bs);
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/*******************************************************
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Bit Allocation Stuff
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******************************************************/
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int bits_for_nonoise(twolame_options * glopts, FLOAT SMR[2][SBLIMIT],
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unsigned int scfsi[2][SBLIMIT], FLOAT min_mnr,
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unsigned int bit_alloc[2][SBLIMIT]);
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int init_bit_allocation(twolame_options * glopts);
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void main_bit_allocation(twolame_options * glopts, FLOAT SMR[2][SBLIMIT],
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unsigned int scfsi[2][SBLIMIT],
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unsigned int bit_alloc[2][SBLIMIT], int *adb);
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int vbr_bit_allocation(twolame_options * glopts, FLOAT SMR[2][SBLIMIT],
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unsigned int scfsi[2][SBLIMIT],
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unsigned int bit_alloc[2][SBLIMIT], int *adb);
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int a_bit_allocation(twolame_options * glopts, FLOAT SMR[2][SBLIMIT],
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unsigned int scfsi[2][SBLIMIT], unsigned int bit_alloc[2][SBLIMIT], int *adb);
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#endif
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// vim:ts=4:sw=4:nowrap:
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