gain_analysis.h File Reference

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Classes
struct	replaygain_data
Defines
#define	PINK_REF   64.82 /* 298640883795 */
#define	YULE_ORDER   10
#define	BUTTER_ORDER   2
#define	YULE_FILTER   filterYule
#define	BUTTER_FILTER   filterButter
#define	RMS_PERCENTILE   0.95
#define	MAX_SAMP_FREQ   48000L
#define	RMS_WINDOW_TIME_NUMERATOR   1L
#define	RMS_WINDOW_TIME_DENOMINATOR   20L
#define	STEPS_per_dB   100.
#define	MAX_dB   120.
Typedefs
typedef sample_t	Float_t
typedef replaygain_data	replaygain_t
Enumerations
enum	{   GAIN_NOT_ENOUGH_SAMPLES = -24601, GAIN_ANALYSIS_ERROR = 0, GAIN_ANALYSIS_OK, INIT_GAIN_ANALYSIS_ERROR = 0,   INIT_GAIN_ANALYSIS_OK = 1 }
enum	{ MAX_ORDER = (BUTTER_ORDER > YULE_ORDER ? BUTTER_ORDER : YULE_ORDER), MAX_SAMPLES_PER_WINDOW = ((MAX_SAMP_FREQ * RMS_WINDOW_TIME_NUMERATOR) / RMS_WINDOW_TIME_DENOMINATOR + 1) }
Functions
int	InitGainAnalysis (replaygain_t *rgData, long samplefreq)
int	AnalyzeSamples (replaygain_t *rgData, const Float_t *left_samples, const Float_t *right_samples, size_t num_samples, int num_channels)
int	ResetSampleFrequency (replaygain_t *rgData, long samplefreq)
Float_t	GetTitleGain (replaygain_t *rgData)
Float_t	GetAlbumGain (replaygain_t *rgData)

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Define Documentation

#define BUTTER_FILTER   filterButter

Definition at line 53 of file gain_analysis.h.

Referenced by AnalyzeSamples().

#define BUTTER_ORDER   2

Definition at line 51 of file gain_analysis.h.

#define MAX_dB   120.

Definition at line 59 of file gain_analysis.h.

#define MAX_SAMP_FREQ   48000L

Definition at line 55 of file gain_analysis.h.

#define PINK_REF   64.82 /* 298640883795 */

Definition at line 47 of file gain_analysis.h.

Referenced by analyzeResult().

#define RMS_PERCENTILE   0.95

Definition at line 54 of file gain_analysis.h.

Referenced by analyzeResult().

#define RMS_WINDOW_TIME_DENOMINATOR   20L

Definition at line 57 of file gain_analysis.h.

Referenced by ResetSampleFrequency().

#define RMS_WINDOW_TIME_NUMERATOR   1L

Definition at line 56 of file gain_analysis.h.

Referenced by ResetSampleFrequency().

#define STEPS_per_dB   100.

Definition at line 58 of file gain_analysis.h.

Referenced by analyzeResult(), and AnalyzeSamples().

#define YULE_FILTER   filterYule

Definition at line 52 of file gain_analysis.h.

Referenced by AnalyzeSamples().

#define YULE_ORDER   10

Definition at line 50 of file gain_analysis.h.

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Typedef Documentation

typedef sample_t Float_t

Definition at line 44 of file gain_analysis.h.

typedef struct replaygain_data replaygain_t

Definition at line 94 of file gain_analysis.h.

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Enumeration Type Documentation

anonymous enum

Enumerator:

GAIN_NOT_ENOUGH_SAMPLES
GAIN_ANALYSIS_ERROR
GAIN_ANALYSIS_OK
INIT_GAIN_ANALYSIS_ERROR
INIT_GAIN_ANALYSIS_OK

Definition at line 61 of file gain_analysis.h.

anonymous enum

Enumerator:

MAX_ORDER
MAX_SAMPLES_PER_WINDOW

Definition at line 65 of file gain_analysis.h.

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Function Documentation

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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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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