diff options
Diffstat (limited to 'pjmedia/src/pjmedia-codec/speex/speex_echo.h')
-rw-r--r-- | pjmedia/src/pjmedia-codec/speex/speex_echo.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia-codec/speex/speex_echo.h b/pjmedia/src/pjmedia-codec/speex/speex_echo.h new file mode 100644 index 00000000..1962a560 --- /dev/null +++ b/pjmedia/src/pjmedia-codec/speex/speex_echo.h @@ -0,0 +1,82 @@ +/* Copyright (C) Jean-Marc Valin */ +/** + @file speex_echo.h + @brief Echo cancellation +*/ +/* + 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 + +#include "speex/speex_types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** Obtain frame size used by the AEC */ +#define SPEEX_ECHO_GET_FRAME_SIZE 3 + +/** Set sampling rate */ +#define SPEEX_ECHO_SET_SAMPLING_RATE 24 +/** Get sampling rate */ +#define SPEEX_ECHO_GET_SAMPLING_RATE 25 + + +/*struct drft_lookup;*/ +struct SpeexEchoState_; + +typedef struct SpeexEchoState_ 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, spx_int32_t *Y); + +/** Reset the echo canceller state */ +void speex_echo_state_reset(SpeexEchoState *st); + +/** Used like the ioctl function to control the echo canceller parameters + * + * @param state Encoder state + * @param request ioctl-type request (one of the SPEEX_ECHO_* macros) + * @param ptr Data exchanged to-from function + * @return 0 if no error, -1 if request in unknown + */ +int speex_echo_ctl(SpeexEchoState *st, int request, void *ptr); + +#ifdef __cplusplus +} +#endif + +#endif |