Speex
1.2~beta4
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00001 /* Copyright (C) Jean-Marc Valin */ 00006 /* 00007 Redistribution and use in source and binary forms, with or without 00008 modification, are permitted provided that the following conditions are 00009 met: 00010 00011 1. Redistributions of source code must retain the above copyright notice, 00012 this list of conditions and the following disclaimer. 00013 00014 2. Redistributions in binary form must reproduce the above copyright 00015 notice, this list of conditions and the following disclaimer in the 00016 documentation and/or other materials provided with the distribution. 00017 00018 3. The name of the author may not be used to endorse or promote products 00019 derived from this software without specific prior written permission. 00020 00021 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 00022 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00023 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00024 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 00025 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00026 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 00027 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00028 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 00029 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 00030 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00031 POSSIBILITY OF SUCH DAMAGE. 00032 */ 00033 00034 #ifndef SPEEX_ECHO_H 00035 #define SPEEX_ECHO_H 00036 00040 #include "speex/speex_types.h" 00041 00042 #ifdef __cplusplus 00043 extern "C" { 00044 #endif 00045 00047 #define SPEEX_ECHO_GET_FRAME_SIZE 3 00048 00050 #define SPEEX_ECHO_SET_SAMPLING_RATE 24 00051 00052 #define SPEEX_ECHO_GET_SAMPLING_RATE 25 00053 00054 /* Can't set window sizes */ 00056 #define SPEEX_ECHO_GET_IMPULSE_RESPONSE_SIZE 27 00057 00058 /* Can't set window content */ 00060 #define SPEEX_ECHO_GET_IMPULSE_RESPONSE 29 00061 00063 struct SpeexEchoState_; 00064 00070 typedef struct SpeexEchoState_ SpeexEchoState; 00071 00077 SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length); 00078 00086 SpeexEchoState *speex_echo_state_init_mc(int frame_size, int filter_length, int nb_mic, int nb_speakers); 00087 00091 void speex_echo_state_destroy(SpeexEchoState *st); 00092 00101 void speex_echo_cancellation(SpeexEchoState *st, const spx_int16_t *rec, const spx_int16_t *play, spx_int16_t *out); 00102 00104 void speex_echo_cancel(SpeexEchoState *st, const spx_int16_t *rec, const spx_int16_t *play, spx_int16_t *out, spx_int32_t *Yout); 00105 00112 void speex_echo_capture(SpeexEchoState *st, const spx_int16_t *rec, spx_int16_t *out); 00113 00118 void speex_echo_playback(SpeexEchoState *st, const spx_int16_t *play); 00119 00123 void speex_echo_state_reset(SpeexEchoState *st); 00124 00132 int speex_echo_ctl(SpeexEchoState *st, int request, void *ptr); 00133 00134 00135 00136 struct SpeexDecorrState_; 00137 00138 typedef struct SpeexDecorrState_ SpeexDecorrState; 00139 00140 00147 SpeexDecorrState *speex_decorrelate_new(int rate, int channels, int frame_size); 00148 00156 void speex_decorrelate(SpeexDecorrState *st, const spx_int16_t *in, spx_int16_t *out, int strength); 00157 00161 void speex_decorrelate_destroy(SpeexDecorrState *st); 00162 00163 00164 #ifdef __cplusplus 00165 } 00166 #endif 00167 00168 00170 #endif