Introduce subdivide_tukey apodization

Subdivide_tukey is intended to replace partial_tukey and
punchout_tukey. It works in rougly the same way, but uses a more
efficient algorithm, recyling more data.

subdivide_tukey has 2 arguments, of which 1 is optional. The
first states the maximum number of parts the signal has to be
split up in, the second is the tukey parameter, divided by the
max num of parts.

subdivide_tukey(3) analyses audio with an unsplit block, with the
block split in 2 and split in 3. Here the default p of 0.5 applies
to the smallest parts, so the unsplit block effectively has a p of
0.5/3. subdivide_tukey(3/2e-1) does the same but with p of 0.2.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libFLAC/include/private/lpc.h b/src/libFLAC/include/private/lpc.h
index 470dfcb8..5212b35e 100644
--- a/src/libFLAC/include/private/lpc.h
+++ b/src/libFLAC/include/private/lpc.h
@@ -56,6 +56,8 @@
  */
 void FLAC__lpc_window_data(const FLAC__int32 in[], const FLAC__real window[], FLAC__real out[], uint32_t data_len);
 void FLAC__lpc_window_data_wide(const FLAC__int64 in[], const FLAC__real window[], FLAC__real out[], uint32_t data_len);
+void FLAC__lpc_window_data_partial(const FLAC__int32 in[], const FLAC__real window[], FLAC__real out[], uint32_t data_len, uint32_t part_size, uint32_t data_shift);
+void FLAC__lpc_window_data_partial_wide(const FLAC__int64 in[], const FLAC__real window[], FLAC__real out[], uint32_t data_len, uint32_t part_size, uint32_t data_shift);
 
 /*
  *	FLAC__lpc_compute_autocorrelation()