3 Commits

Author	SHA1	Message	Date
andrew@webrtc.org	041035b390	Add an AudioRingBuffer class wrapper for the ring_buffer.h C interface. ... Integrate it in Blocker to demonstrate use. TEST=beamforming sounds good. R=aluebs@webrtc.org, mgraczyk@chromium.org, sahark@google.com Review URL: https://webrtc-codereview.appspot.com/36799004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@8157 4adac7df-926f-26a2-2b94-8c16560cd09d	2015-01-26 21:23:53 +00:00
aluebs@webrtc.org	8789376cd3	Move ChannelBuffer class to channel_buffer file ... No change in functionallity. BUG=webrtc:3146 R=andrew@webrtc.org, bjornv@webrtc.org, kwiberg@webrtc.org Review URL: https://webrtc-codereview.appspot.com/28109004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7760 4adac7df-926f-26a2-2b94-8c16560cd09d	2014-11-27 23:40:25 +00:00
aluebs@webrtc.org	79b9eba3ab	Implement 3 band splitting filter bank by upsampling and splitting twice into 2 bands ... Implemented the 3 bands splitting filter bank by: 1. Upsample by 4/3. 2. Split twice into 2 bands. 3. Discard upper most band, because it is empty anyway. A unittest was also implemented: 1. Generate a signal from presence or absence of sine waves of different frequencies. 2. Split into 3 bands and check their presence or absence. 3. Recombine the bands. 4. Calculate delay (as it is an IIR it depends on frequency). 5. Check that the cross correlation of input and output is high enough at that delay. BUG=webrtc:3146 R=andrew@webrtc.org, bjornv@webrtc.org, kwiberg@webrtc.org Review URL: https://webrtc-codereview.appspot.com/31029004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7754 4adac7df-926f-26a2-2b94-8c16560cd09d	2014-11-26 20:21:38 +00:00