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50 lines
2.0 KiB
C
50 lines
2.0 KiB
C
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/* plugin_common - Routines common to several plugins
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* Copyright (C) 2002 Josh Coalson
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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#ifndef FLAC__PLUGIN_COMMON__REPLAYGAIN_SYNTHESIS_H
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#define FLAC__PLUGIN_COMMON__REPLAYGAIN_SYNTHESIS_H
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#include "export.h"
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#include "defs.h"
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#include "FLAC/ordinals.h"
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typedef struct {
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const float* FilterCoeff;
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FLAC__uint64 Mask;
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double Add;
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float Dither;
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float ErrorHistory [FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS] [16]; /* 16th order Noise shaping */
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float DitherHistory [FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS] [16];
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int LastRandomNumber [FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
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} DitherContext;
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typedef enum {
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NOISE_SHAPING_NONE = 0,
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NOISE_SHAPING_LOW = 1,
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NOISE_SHAPING_MEDUIM = 2,
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NOISE_SHAPING_HIGH = 3
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} NoiseShaping;
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PLUGIN_COMMON_API void FLAC__plugin_common__init_dither_context(DitherContext *dither, int bits, int shapingtype);
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/* scale = (float) pow(10., (double)replaygain * 0.05); */
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PLUGIN_COMMON_API int FLAC__plugin_common_apply_gain(FLAC__byte *data_out, FLAC__int32 *input, unsigned wide_samples, unsigned channels, const unsigned source_bps, const unsigned target_bps, const float scale, const FLAC__bool hard_limit, FLAC__bool do_dithering, NoiseShaping noise_shaping, DitherContext *dither_context);
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#endif
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