2 commits

Author	SHA1	Message	Date
Lu, Han	380c9fa444	alsabat: truncate sample frames for faster FFT analysis ... Truncate the sample frames to powers of 2, since the FFTW algorithm runs especially fast in this case, and other sizes may be computed by means of a slow, general-purpose algorithm. In my test environment applying the patch, a sound clip of 33072 frames is cut off to 32768 frames before analysis, and the time cost is reduced from 6.128s to 0.224s. Signed-off-by: Lu, Han <han.lu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>	2016-03-01 10:31:00 +01:00
Lu, Han	d727c9d90e	BAT: Add spectrum analysis functions ... Add functions that detecting signal frequency through spectrum analyzing. Signed-off-by: Lu, Han <han.lu@intel.com> Signed-off-by: Liam Girdwood <liam.r.girdwood@intel.com> Signed-off-by: Bernard Gautier <bernard.gautier@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>	2015-10-02 12:42:03 +02:00