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speex_stereo.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) 2002 Jean-Marc Valin*/
- /**
- @file speex_stereo.h
- @brief Describes the handling for intensity stereo
- */
- /*
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- - 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.
- - Neither the name of the Xiph.org Foundation nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``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 FOUNDATION OR
- CONTRIBUTORS 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 STEREO_H
- #define STEREO_H
- #include "speex/speex_types.h"
- #include "speex/speex_bits.h"
- #ifdef __cplusplus
- extern "C" {
- #endif
- /** State used for decoding (intensity) stereo information */
- typedef struct SpeexStereoState {
- float balance; /**< Left/right balance info */
- float e_ratio; /**< Ratio of energies: E(left+right)/[E(left)+E(right)] */
- float smooth_left; /**< Smoothed left channel gain */
- float smooth_right; /**< Smoothed right channel gain */
- float reserved1; /**< Reserved for future use */
- float reserved2; /**< Reserved for future use */
- } SpeexStereoState;
- /** Initialization value for a stereo state */
- #define SPEEX_STEREO_STATE_INIT {1,.5,1,1}
- /** Transforms a stereo frame into a mono frame and stores intensity stereo info in 'bits' */
- void speex_encode_stereo(float *data, int frame_size, SpeexBits *bits);
- /** Transforms a stereo frame into a mono frame and stores intensity stereo info in 'bits' */
- void speex_encode_stereo_int(spx_int16_t *data, int frame_size, SpeexBits *bits);
- /** Transforms a mono frame into a stereo frame using intensity stereo info */
- void speex_decode_stereo(float *data, int frame_size, SpeexStereoState *stereo);
- /** Transforms a mono frame into a stereo frame using intensity stereo info */
- void speex_decode_stereo_int(spx_int16_t *data, int frame_size, SpeexStereoState *stereo);
- /** Callback handler for intensity stereo info */
- int speex_std_stereo_request_handler(SpeexBits *bits, void *state, void *data);
- #ifdef __cplusplus
- }
- #endif
- #endif