speex_echo.h
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /* Copyright (C) Jean-Marc Valin
- File: speex_echo.h
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- 1. Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- 3. The name of the author may not be used to endorse or promote products
- derived from this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef SPEEX_ECHO_H
- #define SPEEX_ECHO_H
- #ifdef __cplusplus
- extern "C" {
- #endif
- struct drft_lookup;
- typedef struct SpeexEchoState {
- int frame_size; /**< Number of samples processed each time */
- int window_size;
- int M;
- int cancel_count;
- int adapted;
- float adapt_rate;
- float sum_adapt;
- float Sey;
- float Syy;
- float See;
- float *x;
- float *X;
- float *d;
- float *D;
- float *y;
- float *y2;
- float *last_y;
- float *Yps;
- float *Y;
- float *Y2;
- float *E;
- float *PHI;
- float * restrict W;
- float *power;
- float *power_1;
- float *grad;
- float *Rf;
- float *Yf;
- float *Xf;
- float *fratio;
- float *regul;
- struct drft_lookup *fft_lookup;
- } SpeexEchoState;
- /** Creates a new echo canceller state */
- SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length);
- /** Destroys an echo canceller state */
- void speex_echo_state_destroy(SpeexEchoState *st);
- /** Performs echo cancellation a frame */
- void speex_echo_cancel(SpeexEchoState *st, short *ref, short *echo, short *out, float *Y);
- /** Reset the echo canceller state */
- void speex_echo_state_reset(SpeexEchoState *st);
- #ifdef __cplusplus
- }
- #endif
- #endif