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add support for specifying which apodization functions to use to window data before lpc analysis

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This commit is contained in:
Josh Coalson
2006-04-25 06:38:43 +00:00
parent c8dc7a43ec
commit bf0f52c21e
22 changed files with 599 additions and 65 deletions
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42
src/libFLAC/include/protected/stream_encoder.h
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@@ -34,6 +34,44 @@
#include "FLAC/stream_encoder.h"
#ifndef FLAC__INTEGER_ONLY_LIBRARY
#include "private/float.h"
#define FLAC__MAX_APODIZATION_FUNCTIONS 32
typedef enum {
FLAC__APODIZATION_BARTLETT,
FLAC__APODIZATION_BARTLETT_HANN,
FLAC__APODIZATION_BLACKMAN,
FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE,
FLAC__APODIZATION_CONNES,
FLAC__APODIZATION_FLATTOP,
FLAC__APODIZATION_GAUSS,
FLAC__APODIZATION_HAMMING,
FLAC__APODIZATION_HANN,
FLAC__APODIZATION_KAISER_BESSEL,
FLAC__APODIZATION_NUTTALL,
FLAC__APODIZATION_RECTANGLE,
FLAC__APODIZATION_TRIANGLE,
FLAC__APODIZATION_TUKEY,
FLAC__APODIZATION_WELCH
} FLAC__ApodizationFunction;
typedef struct {
FLAC__ApodizationFunction type;
union {
struct {
FLAC__real stddev;
} gauss;
struct {
FLAC__real p;
} tukey;
} parameters;
} FLAC__ApodizationSpecification;
#endif // #ifndef FLAC__INTEGER_ONLY_LIBRARY
typedef struct FLAC__StreamEncoderProtected {
FLAC__StreamEncoderState state;
FLAC__bool verify;
@@ -44,6 +82,10 @@ typedef struct FLAC__StreamEncoderProtected {
unsigned bits_per_sample;
unsigned sample_rate;
unsigned blocksize;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
unsigned num_apodizations;
FLAC__ApodizationSpecification apodizations[FLAC__MAX_APODIZATION_FUNCTIONS];
#endif
unsigned max_lpc_order;
unsigned qlp_coeff_precision;
FLAC__bool do_qlp_coeff_prec_search;