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

doc/html/changelog.html

@@ -127,6 +127,7 @@
 					<li>
 						libFLAC:
 						<ul>
+							<li><b>Added</b> FLAC__*_encoder_set_apodization()</li>
 							<li><b>Added</b> FLAC__metadata_object_cuesheet_calculate_cddb_id()</li>
 							<li><b>Added</b> FLAC__metadata_get_cuesheet()</li>
 						</ul>
@@ -134,6 +135,7 @@
 					<li>
 						libFLAC++:
 						<ul>
+							<li><b>Added</b> FLAC::*::Encoder::set_apodization()</li>
 							<li><b>Added</b> FLAC::Metadata::CueSheet::calculate_cddb_id()</li>
 							<li><b>Added</b> FLAC::Metadata::get_cuesheet()</li>
 						</ul>

include/FLAC/file_encoder.h

@@ -314,6 +314,21 @@ FLAC_API FLAC__bool FLAC__file_encoder_set_sample_rate(FLAC__FileEncoder *encode
  */
 FLAC_API FLAC__bool FLAC__file_encoder_set_blocksize(FLAC__FileEncoder *encoder, unsigned value);
 
+/** This is inherited from FLAC__SeekableStreamEncoder; see
+ *  FLAC__seekable_stream_encoder_set_apodization().
+ *
+ * \default \c 0
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+/* @@@@add to unit tests*/
+FLAC_API FLAC__bool FLAC__file_encoder_set_apodization(FLAC__FileEncoder *encoder, const char *specification);
+
 /** This is inherited from FLAC__SeekableStreamEncoder; see
  *  FLAC__seekable_stream_encoder_set_max_lpc_order().
  *

include/FLAC/format.h

@@ -315,6 +315,10 @@ typedef struct {
 
 	const FLAC__int32 *residual;
 	/**< The residual signal, length == (blocksize minus order) samples. */
+
+#ifdef WINDOW_DEBUG_OUTPUT
+	char window_type[64]; //@@@@@@
+#endif
 } FLAC__Subframe_LPC;
 
 extern FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN; /**< == 4 (bits) */

include/FLAC/seekable_stream_encoder.h

@@ -416,6 +416,21 @@ FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_sample_rate(FLAC__Seekable
  */
 FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_blocksize(FLAC__SeekableStreamEncoder *encoder, unsigned value);
 
+/** This is inherited from FLAC__StreamEncoder; see
+ *  FLAC__stream_encoder_set_apodization().
+ *
+ * \default \c 0
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+/* @@@@add to unit tests*/
+FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_apodization(FLAC__SeekableStreamEncoder *encoder, const char *specification);
+
 /** This is inherited from FLAC__StreamEncoder; see
  *  FLAC__stream_encoder_set_max_lpc_order().
  *

include/FLAC/stream_encoder.h

@@ -498,6 +498,52 @@ FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *en
  */
 FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value);
 
+/** Sets the apodization function(s) the encoder will use when windowing
+ *  audio data for LPC analysis.
+ *
+ * The \a specification is a plain ASCII string which specifies exactly
+ * which functions to use.  There may be more than one (up to 32),
+ * separated by \c ';' characters.  Some functions take one or more
+ * comma-separated arguments in parentheses.
+ *
+ * The available functions are \c bartlett, \c bartlett_hann,
+ * \c blackman, \c blackman_harris_4term_92db, \c connes, \c flattop,
+ * \c gauss(STDDEV), \c hamming, \c hann, \c kaiser_bessel, \c nuttall,
+ * \c rectangle, \c triangle, \c tukey(P), \c welch.
+ *
+ * For \c gauss(STDDEV), STDDEV specifies the standard deviation
+ * (0<STDDEV<=0.5).
+ *
+ * For \c tukey(P), P specifies the fraction of the window that is
+ * tapered (0<=P<=1).  P=0 corresponds to \c rectangle and P=1
+ * corresponds to \c hann.
+ *
+ * Example specifications are \c "blackman" or
+ * \c "hann;triangle;tukey(0.5);tukey(0.25);tukey(0.125)"
+ *
+ * Any function that is specified erroneously is silently dropped.  Up
+ * to 32 functions are kept, the rest are dropped.  If the specification
+ * is empty the encoder defaults to \c "hann".
+ *
+ * When more than one function is specified, then for every subframe the
+ * encoder will try each of them separately and choose the window that
+ * results in the smallest compressed subframe.
+ *
+ * Note that each function specified causes the encoder to occupy a
+ * floating point array in which to store the window.
+ *
+ * \default \c "hann"
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+/* @@@@add to unit tests*/
+FLAC_API FLAC__bool FLAC__stream_encoder_set_apodization(FLAC__StreamEncoder *encoder, const char *specification);
+
 /** Set the maximum LPC order, or \c 0 to use only the fixed predictors.
  *
  * \default \c 0

include/OggFLAC/file_encoder.h

@@ -298,6 +298,20 @@ OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_sample_rate(OggFLAC__FileEncode
  */
 OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_blocksize(OggFLAC__FileEncoder *encoder, unsigned value);
 
+/** This is inherited from OggFLAC__SeekableStreamEncoder; see
+ *  OggFLAC__seekable_stream_encoder_set_apodization().
+ *
+ * \default \c 0
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_apodization(OggFLAC__FileEncoder *encoder, const char *specification);
+
 /** This is inherited from OggFLAC__SeekableStreamEncoder; see
  *  OggFLAC__seekable_stream_encoder_set_max_lpc_order().
  *

include/OggFLAC/seekable_stream_encoder.h

@@ -376,6 +376,19 @@ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_encoder_set_sample_rate(OggFLAC_
  */
 OggFLAC_API FLAC__bool OggFLAC__seekable_stream_encoder_set_blocksize(OggFLAC__SeekableStreamEncoder *encoder, unsigned value);
 
+/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_apodization()
+ *
+ * \default \c 0
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+OggFLAC_API FLAC__bool OggFLAC__seekable_stream_encoder_set_apodization(OggFLAC__SeekableStreamEncoder *encoder, const char *specification);
+
 /** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_max_lpc_order()
  *
  * \default \c 0

include/OggFLAC/stream_encoder.h

@@ -312,6 +312,19 @@ OggFLAC_API FLAC__bool OggFLAC__stream_encoder_set_sample_rate(OggFLAC__StreamEn
  */
 OggFLAC_API FLAC__bool OggFLAC__stream_encoder_set_blocksize(OggFLAC__StreamEncoder *encoder, unsigned value);
 
+/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_apodization()
+ *
+ * \default \c 0
+ * \param  encoder        An encoder instance to set.
+ * \param  specification  See above.
+ * \assert
+ *    \code encoder != NULL \endcode
+ *    \code specification != NULL \endcode
+ * \retval FLAC__bool
+ *    \c false if the encoder is already initialized, else \c true.
+ */
+OggFLAC_API FLAC__bool OggFLAC__stream_encoder_set_apodization(OggFLAC__StreamEncoder *encoder, const char *specification);
+
 /** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_max_lpc_order()
  *
  * \default \c 0

src/flac/encode.c

@@ -1427,6 +1427,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
 			OggFLAC__stream_encoder_set_bits_per_sample(e->encoder.ogg.stream, bps);
 			OggFLAC__stream_encoder_set_sample_rate(e->encoder.ogg.stream, sample_rate);
 			OggFLAC__stream_encoder_set_blocksize(e->encoder.ogg.stream, options.blocksize);
+			OggFLAC__stream_encoder_set_apodization(e->encoder.ogg.stream, options.apodizations);
 			OggFLAC__stream_encoder_set_max_lpc_order(e->encoder.ogg.stream, options.max_lpc_order);
 			OggFLAC__stream_encoder_set_qlp_coeff_precision(e->encoder.ogg.stream, options.qlp_coeff_precision);
 			OggFLAC__stream_encoder_set_do_qlp_coeff_prec_search(e->encoder.ogg.stream, options.do_qlp_coeff_prec_search);
@@ -1463,6 +1464,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
 			OggFLAC__file_encoder_set_bits_per_sample(e->encoder.ogg.file, bps);
 			OggFLAC__file_encoder_set_sample_rate(e->encoder.ogg.file, sample_rate);
 			OggFLAC__file_encoder_set_blocksize(e->encoder.ogg.file, options.blocksize);
+			OggFLAC__file_encoder_set_apodization(e->encoder.ogg.file, options.apodizations);
 			OggFLAC__file_encoder_set_max_lpc_order(e->encoder.ogg.file, options.max_lpc_order);
 			OggFLAC__file_encoder_set_qlp_coeff_precision(e->encoder.ogg.file, options.qlp_coeff_precision);
 			OggFLAC__file_encoder_set_do_qlp_coeff_prec_search(e->encoder.ogg.file, options.do_qlp_coeff_prec_search);
@@ -1499,6 +1501,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
 		FLAC__stream_encoder_set_bits_per_sample(e->encoder.flac.stream, bps);
 		FLAC__stream_encoder_set_sample_rate(e->encoder.flac.stream, sample_rate);
 		FLAC__stream_encoder_set_blocksize(e->encoder.flac.stream, options.blocksize);
+		FLAC__stream_encoder_set_apodization(e->encoder.flac.stream, options.apodizations);
 		FLAC__stream_encoder_set_max_lpc_order(e->encoder.flac.stream, options.max_lpc_order);
 		FLAC__stream_encoder_set_qlp_coeff_precision(e->encoder.flac.stream, options.qlp_coeff_precision);
 		FLAC__stream_encoder_set_do_qlp_coeff_prec_search(e->encoder.flac.stream, options.do_qlp_coeff_prec_search);
@@ -1534,6 +1537,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
 		FLAC__file_encoder_set_bits_per_sample(e->encoder.flac.file, bps);
 		FLAC__file_encoder_set_sample_rate(e->encoder.flac.file, sample_rate);
 		FLAC__file_encoder_set_blocksize(e->encoder.flac.file, options.blocksize);
+		FLAC__file_encoder_set_apodization(e->encoder.flac.file, options.apodizations);
 		FLAC__file_encoder_set_max_lpc_order(e->encoder.flac.file, options.max_lpc_order);
 		FLAC__file_encoder_set_qlp_coeff_precision(e->encoder.flac.file, options.qlp_coeff_precision);
 		FLAC__file_encoder_set_do_qlp_coeff_prec_search(e->encoder.flac.file, options.do_qlp_coeff_prec_search);
@@ -2141,7 +2145,7 @@ FLAC__bool fskip_ahead(FILE *f, FLAC__uint64 offset)
 		long need = (long)min(offset, LONG_MAX);
 	   	if(fseek(f, need, SEEK_CUR) < 0) {
 			need = (long)min(offset, sizeof(dump));
-			if(fread(dump, 1, need, f) < need)
+			if((long)fread(dump, 1, need, f) < need)
 				return false;
 		}
 		offset -= need;

src/flac/encode.h

@@ -43,6 +43,7 @@ typedef struct {
 	unsigned min_residual_partition_order;
 	unsigned max_residual_partition_order;
 	unsigned rice_parameter_search_dist;
+	char *apodizations;
 	unsigned max_lpc_order;
 	unsigned blocksize;
 	unsigned qlp_coeff_precision;

src/flac/main.c

@@ -147,6 +147,7 @@ static struct share__option long_options_[] = {
 	{ "blocksize"                 , share__required_argument, 0, 'b' },
 	{ "exhaustive-model-search"   , share__no_argument, 0, 'e' },
 	{ "max-lpc-order"             , share__required_argument, 0, 'l' },
+	{ "apodization"               , share__required_argument, 0, 'A' },
 	{ "mid-side"                  , share__no_argument, 0, 'm' },
 	{ "adaptive-mid-side"         , share__no_argument, 0, 'M' },
 	{ "qlp-coeff-precision-search", share__no_argument, 0, 'p' },
@@ -232,6 +233,7 @@ static struct {
 	const char *output_prefix;
 	analysis_options aopts;
 	int padding;
+	char apodizations[1000]; /* bad MAGIC NUMBER but buffer overflow is checked */
 	unsigned max_lpc_order;
 	unsigned qlp_coeff_precision;
 	const char *skip_specification;
@@ -247,7 +249,7 @@ static struct {
 	int min_residual_partition_order;
 	int max_residual_partition_order;
 	int rice_parameter_search_dist;
-	char requested_seek_points[50000]; /* bad MAGIC NUMBER but buffer overflow is checked */
+	char requested_seek_points[5000]; /* bad MAGIC NUMBER but buffer overflow is checked */
 	int num_requested_seek_points; /* -1 => no -S options were given, 0 => -S- was given */
 	const char *cuesheet_filename;
 	FLAC__bool cued_seekpoints;
@@ -577,6 +579,7 @@ FLAC__bool init_options()
 	option_values.aopts.do_residual_text = false;
 	option_values.aopts.do_residual_gnuplot = false;
 	option_values.padding = 4096;
+	option_values.apodizations[0] = '\0';
 	option_values.max_lpc_order = 8;
 	option_values.qlp_coeff_precision = 0;
 	option_values.skip_specification = 0;
@@ -615,7 +618,7 @@ int parse_options(int argc, char *argv[])
 	int short_option;
 	int option_index = 1;
 	FLAC__bool had_error = false;
-	const char *short_opts = "0123456789ab:cdefFhHl:mMo:pP:q:r:sS:tT:vV";
+	const char *short_opts = "0123456789aA:b:cdefFhHl:mMo:pP:q:r:sS:tT:vV";
 
 	while ((short_option = share__getopt_long(argc, argv, short_opts, long_options_, &option_index)) != -1) {
 		switch (short_option) {
@@ -1030,6 +1033,16 @@ int parse_option(int short_option, const char *long_option, const char *option_a
 				FLAC__ASSERT(0 != option_argument);
 				option_values.max_lpc_order = atoi(option_argument);
 				break;
+			case 'A':
+				FLAC__ASSERT(0 != option_argument);
+				if(strlen(option_values.apodizations)+strlen(option_argument)+2 >= sizeof(option_values.apodizations)) {
+					return usage_error("ERROR: too many apodization functions requested\n");
+				}
+				else {
+					strcat(option_values.apodizations, option_argument);
+					strcat(option_values.apodizations, ";");
+				}
+				break;
 			case 'm':
 				option_values.do_mid_side = true;
 				option_values.loose_mid_side = false;
@@ -1210,6 +1223,7 @@ void show_help()
 	printf("  -m, --mid-side                     Try mid-side coding for each frame\n");
 	printf("  -M, --adaptive-mid-side            Adaptive mid-side coding for all frames\n");
 	printf("  -e, --exhaustive-model-search      Do exhaustive model search (expensive!)\n");
+	printf("  -A, --apodization=\"function\"       Window audio data with given the function\n");
 	printf("  -l, --max-lpc-order=#              Max LPC order; 0 => only fixed predictors\n");
 	printf("  -p, --qlp-coeff-precision-search   Exhaustively search LP coeff quantization\n");
 	printf("  -q, --qlp-coeff-precision=#        Specify precision in bits\n");
@@ -1422,6 +1436,16 @@ void show_explain()
 	printf("  -M, --adaptive-mid-side            Adaptive mid-side coding for all frames\n");
 	printf("                                     (stereo only)\n");
 	printf("  -e, --exhaustive-model-search      Do exhaustive model search (expensive!)\n");
+	printf("  -A, --apodization=\"function\"       Window audio data with given the function.\n");
+	printf("                                     The functions are: bartlett, bartlett_hann,\n");
+	printf("                                     blackman, blackman_harris_4term_92db,\n");
+	printf("                                     connes, flattop, gauss(STDDEV), hamming,\n");
+	printf("                                     hann, kaiser_bessel, nuttall, rectangle,\n");
+	printf("                                     triangle, tukey(P), welch.  More than one\n");
+	printf("                                     may be specified but encoding time is a\n");
+	printf("                                     multiple of the number of functions since\n");
+	printf("                                     they are each tried in turn.  The default\n");
+	printf("                                     is \"hann\". \n");
 	printf("  -l, --max-lpc-order=#              Max LPC order; 0 => only fixed predictors\n");
 	printf("  -p, --qlp-coeff-precision-search   Do exhaustive search of LP coefficient\n");
 	printf("                                     quantization (expensive!); overrides -q;\n");
@@ -1606,6 +1630,7 @@ int encode_file(const char *infilename, FLAC__bool is_first_file, FLAC__bool is_
 	common_options.min_residual_partition_order = option_values.min_residual_partition_order;
 	common_options.max_residual_partition_order = option_values.max_residual_partition_order;
 	common_options.rice_parameter_search_dist = option_values.rice_parameter_search_dist;
+	common_options.apodizations = option_values.apodizations;
 	common_options.max_lpc_order = option_values.max_lpc_order;
 	common_options.blocksize = (unsigned)option_values.blocksize;
 	common_options.qlp_coeff_precision = option_values.qlp_coeff_precision;

src/libFLAC/Makefile.lite

@@ -79,7 +79,8 @@ SRCS_C = \
 	seekable_stream_encoder.c \
 	stream_decoder.c \
 	stream_encoder.c \
-	stream_encoder_framing.c
+	stream_encoder_framing.c \
+	window.c
 
 include $(topdir)/build/lib.mk
 

src/libFLAC/file_encoder.c

@@ -314,6 +314,17 @@ FLAC_API FLAC__bool FLAC__file_encoder_set_blocksize(FLAC__FileEncoder *encoder,
 	return FLAC__seekable_stream_encoder_set_blocksize(encoder->private_->seekable_stream_encoder, value);
 }
 
+FLAC_API FLAC__bool FLAC__file_encoder_set_apodization(FLAC__FileEncoder *encoder, const char *specification)
+{
+	FLAC__ASSERT(0 != encoder);
+	FLAC__ASSERT(0 != encoder->private_);
+	FLAC__ASSERT(0 != encoder->protected_);
+	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);
+	if(encoder->protected_->state != FLAC__FILE_ENCODER_UNINITIALIZED)
+		return false;
+	return FLAC__seekable_stream_encoder_set_apodization(encoder->private_->seekable_stream_encoder, specification);
+}
+
 FLAC_API FLAC__bool FLAC__file_encoder_set_max_lpc_order(FLAC__FileEncoder *encoder, unsigned value)
 {
 	FLAC__ASSERT(0 != encoder);

src/libFLAC/format.c

@@ -56,9 +56,10 @@ FLAC_API const char *FLAC__VERSION_STRING = VERSION;
 
 #if defined _MSC_VER || defined __MINW32__
 /* yet one more hack because of MSVC6: */
-FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.1.2 20050205";
+/*@@@@@@WAS:FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.1.2 20050205";*/
+FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC CVS 20060425";
 #else
-FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20050205";
+FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20060425";
 #endif
 
 FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4] = { 'f','L','a','C' };

src/libFLAC/include/private/lpc.h

@@ -41,6 +41,19 @@
 
 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 
+/*
+ *	FLAC__lpc_window_data()
+ *	--------------------------------------------------------------------
+ *	Applies the given window to the data.
+ *  @@@@@@ asm optimize
+ *
+ *	IN in[0,data_len-1]
+ *	IN window[0,data_len-1]
+ *	OUT out[0,lag-1]
+ *	IN data_len
+ */
+void FLAC__lpc_window_data(const FLAC__real in[], const FLAC__real window[], FLAC__real out[], unsigned data_len);
+
 /*
  *	FLAC__lpc_compute_autocorrelation()
  *	--------------------------------------------------------------------

src/libFLAC/include/protected/stream_encoder.h

@@ -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;

src/libFLAC/lpc.c

@@ -45,6 +45,13 @@
 #define M_LN2 0.69314718055994530942
 #endif
 
+void FLAC__lpc_window_data(const FLAC__real in[], const FLAC__real window[], FLAC__real out[], unsigned data_len)
+{
+	unsigned i;
+	for(i = 0; i < data_len; i++)
+		out[i] = in[i] * window[i];
+}
+
 void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
 {
 	/* a readable, but slower, version */

src/libFLAC/seekable_stream_encoder.c

@@ -318,6 +318,17 @@ FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_blocksize(FLAC__SeekableSt
 	return FLAC__stream_encoder_set_blocksize(encoder->private_->stream_encoder, value);
 }
 
+FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_apodization(FLAC__SeekableStreamEncoder *encoder, const char *specification)
+{
+	FLAC__ASSERT(0 != encoder);
+	FLAC__ASSERT(0 != encoder->private_);
+	FLAC__ASSERT(0 != encoder->protected_);
+	FLAC__ASSERT(0 != encoder->private_->stream_encoder);
+	if(encoder->protected_->state != FLAC__SEEKABLE_STREAM_ENCODER_UNINITIALIZED)
+		return false;
+	return FLAC__stream_encoder_set_apodization(encoder->private_->stream_encoder, specification);
+}
+
 FLAC_API FLAC__bool FLAC__seekable_stream_encoder_set_max_lpc_order(FLAC__SeekableStreamEncoder *encoder, unsigned value)
 {
 	FLAC__ASSERT(0 != encoder);

src/libOggFLAC/file_encoder.c

@@ -328,6 +328,17 @@ OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_blocksize(OggFLAC__FileEncoder
 	return OggFLAC__seekable_stream_encoder_set_blocksize(encoder->private_->seekable_stream_encoder, value);
 }
 
+OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_apodization(OggFLAC__FileEncoder *encoder, const char *specification)
+{
+	FLAC__ASSERT(0 != encoder);
+	FLAC__ASSERT(0 != encoder->private_);
+	FLAC__ASSERT(0 != encoder->protected_);
+	FLAC__ASSERT(0 != encoder->private_->seekable_stream_encoder);
+	if(encoder->protected_->state != OggFLAC__FILE_ENCODER_UNINITIALIZED)
+		return false;
+	return OggFLAC__seekable_stream_encoder_set_apodization(encoder->private_->seekable_stream_encoder, specification);
+}
+
 OggFLAC_API FLAC__bool OggFLAC__file_encoder_set_max_lpc_order(OggFLAC__FileEncoder *encoder, unsigned value)
 {
 	FLAC__ASSERT(0 != encoder);