gain_analysis.c File Reference

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lame.h"
#include "machine.h"
#include "gain_analysis.h"

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Functions
static void	filterYule (const Float_t *input, Float_t *output, size_t nSamples, const Float_t *const kernel)
static void	filterButter (const Float_t *input, Float_t *output, size_t nSamples, const Float_t *const kernel)
int	ResetSampleFrequency (replaygain_t *rgData, long samplefreq)
int	InitGainAnalysis (replaygain_t *rgData, long samplefreq)
static double	fsqr (const double d)
int	AnalyzeSamples (replaygain_t *rgData, const Float_t *left_samples, const Float_t *right_samples, size_t num_samples, int num_channels)
static Float_t	analyzeResult (uint32_t const *Array, size_t len)
Float_t	GetTitleGain (replaygain_t *rgData)
Float_t	GetAlbumGain (replaygain_t *rgData)
Variables
static const Float_t	ABYule [9][2 *YULE_ORDER+1]
static const Float_t	ABButter [9][2 *BUTTER_ORDER+1]

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Function Documentation

static Float_t analyzeResult	(	uint32_t const *	Array,
		size_t	len
	)			[static]

Definition at line 455 of file gain_analysis.c.

References GAIN_NOT_ENOUGH_SAMPLES, i, PINK_REF, RMS_PERCENTILE, and STEPS_per_dB.

Referenced by GetAlbumGain(), and GetTitleGain().

int AnalyzeSamples	(	replaygain_t *	rgData,
		const Float_t *	left_samples,
		const Float_t *	right_samples,
		size_t	num_samples,
		int	num_channels
	)

Definition at line 318 of file gain_analysis.c.

References replaygain_data::A, ABButter, ABYule, BUTTER_FILTER, replaygain_data::freqindex, fsqr(), GAIN_ANALYSIS_ERROR, GAIN_ANALYSIS_OK, i, replaygain_data::linpre, replaygain_data::linprebuf, replaygain_data::lout, replaygain_data::loutbuf, replaygain_data::lstep, replaygain_data::lstepbuf, replaygain_data::lsum, MAX_ORDER, memcpy, memmove, replaygain_data::rinpre, replaygain_data::rinprebuf, replaygain_data::rout, replaygain_data::routbuf, replaygain_data::rstep, replaygain_data::rstepbuf, replaygain_data::rsum, replaygain_data::sampleWindow, STEPS_per_dB, replaygain_data::totsamp, and YULE_FILTER.

Referenced by copy_buffer().

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static void filterButter	(	const Float_t *	input,
		Float_t *	output,
		size_t	nSamples,
		const Float_t *const	kernel
	)			[static]

Definition at line 214 of file gain_analysis.c.

static void filterYule	(	const Float_t *	input,
		Float_t *	output,
		size_t	nSamples,
		const Float_t *const	kernel
	)			[static]

Definition at line 180 of file gain_analysis.c.

static double fsqr

(

const double

d

)

[inline, static]

Definition at line 312 of file gain_analysis.c.

Referenced by AnalyzeSamples().

Float_t GetAlbumGain

(

replaygain_t *

rgData

)

Definition at line 504 of file gain_analysis.c.

References analyzeResult(), and replaygain_data::B.

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Float_t GetTitleGain

(

replaygain_t *

rgData

)

Definition at line 478 of file gain_analysis.c.

References replaygain_data::A, analyzeResult(), replaygain_data::B, i, replaygain_data::linprebuf, replaygain_data::loutbuf, replaygain_data::lstepbuf, replaygain_data::lsum, MAX_ORDER, replaygain_data::rinprebuf, replaygain_data::routbuf, replaygain_data::rstepbuf, replaygain_data::rsum, and replaygain_data::totsamp.

Referenced by flush_bitstream().

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int InitGainAnalysis	(	replaygain_t *	rgData,
		long	samplefreq
	)

Definition at line 291 of file gain_analysis.c.

References replaygain_data::B, INIT_GAIN_ANALYSIS_ERROR, INIT_GAIN_ANALYSIS_OK, replaygain_data::linpre, replaygain_data::linprebuf, replaygain_data::lout, replaygain_data::loutbuf, replaygain_data::lstep, replaygain_data::lstepbuf, MAX_ORDER, ResetSampleFrequency(), replaygain_data::rinpre, replaygain_data::rinprebuf, replaygain_data::rout, replaygain_data::routbuf, replaygain_data::rstep, and replaygain_data::rstepbuf.

Referenced by lame_init_params().

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int ResetSampleFrequency	(	replaygain_t *	rgData,
		long	samplefreq
	)

Definition at line 233 of file gain_analysis.c.

References replaygain_data::A, replaygain_data::freqindex, i, INIT_GAIN_ANALYSIS_ERROR, INIT_GAIN_ANALYSIS_OK, replaygain_data::linprebuf, replaygain_data::loutbuf, replaygain_data::lstepbuf, replaygain_data::lsum, MAX_ORDER, replaygain_data::rinprebuf, RMS_WINDOW_TIME_DENOMINATOR, RMS_WINDOW_TIME_NUMERATOR, replaygain_data::routbuf, replaygain_data::rstepbuf, replaygain_data::rsum, replaygain_data::sampleWindow, and replaygain_data::totsamp.

Referenced by InitGainAnalysis().

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Variable Documentation

const Float_t ABButter[9][2 *BUTTER_ORDER+1] [static]

Initial value:

 {
    {0.98621192462708, -1.97223372919527, -1.97242384925416, 0.97261396931306, 0.98621192462708},
    {0.98500175787242, -1.96977855582618, -1.97000351574484, 0.97022847566350, 0.98500175787242},
    {0.97938932735214, -1.95835380975398, -1.95877865470428, 0.95920349965459, 0.97938932735214},
    {0.97531843204928, -1.95002759149878, -1.95063686409857, 0.95124613669835, 0.97531843204928},
    {0.97316523498161, -1.94561023566527, -1.94633046996323, 0.94705070426118, 0.97316523498161},
    {0.96454515552826, -1.92783286977036, -1.92909031105652, 0.93034775234268, 0.96454515552826},
    {0.96009142950541, -1.91858953033784, -1.92018285901082, 0.92177618768381, 0.96009142950541},
    {0.95856916599601, -1.91542108074780, -1.91713833199203, 0.91885558323625, 0.95856916599601},
    {0.94597685600279, -1.88903307939452, -1.89195371200558, 0.89487434461664, 0.94597685600279}
}

Definition at line 159 of file gain_analysis.c.

Referenced by AnalyzeSamples().

const Float_t ABYule[9][2 *YULE_ORDER+1] [static]

Definition at line 111 of file gain_analysis.c.

Referenced by AnalyzeSamples().

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