speex_stereo.h

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00001 /* Copyright (C) 2002 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
00009    are met:
00010    
00011    - Redistributions of source code must retain the above copyright
00012    notice, this list of conditions and the following disclaimer.
00013    
00014    - 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    - Neither the name of the Xiph.org Foundation nor the names of its
00019    contributors may be used to endorse or promote products derived from
00020    this software without specific prior written permission.
00021    
00022    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00023    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00024    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00025    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00026    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00027    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00028    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 */
00034 
00035 #ifndef STEREO_H
00036 #define STEREO_H
00037 
00042 #include "speex/speex_types.h"
00043 #include "speex/speex_bits.h"
00044 
00045 #ifdef __cplusplus
00046 extern "C" {
00047 #endif
00048 
00050 typedef struct SpeexStereoState {
00051    float balance;      
00052    float e_ratio;      
00053    float smooth_left;  
00054    float smooth_right; 
00055    float reserved1;    
00056    float reserved2;    
00057 } SpeexStereoState;
00058 
00060 #define SPEEX_STEREO_STATE_INIT {1,.5,1,1,0,0}
00061 
00063 SpeexStereoState *speex_stereo_state_init();
00064 
00066 void speex_stereo_state_reset(SpeexStereoState *stereo);
00067 
00069 void speex_stereo_state_destroy(SpeexStereoState *stereo);
00070 
00072 void speex_encode_stereo(float *data, int frame_size, SpeexBits *bits);
00073 
00075 void speex_encode_stereo_int(spx_int16_t *data, int frame_size, SpeexBits *bits);
00076 
00078 void speex_decode_stereo(float *data, int frame_size, SpeexStereoState *stereo);
00079 
00081 void speex_decode_stereo_int(spx_int16_t *data, int frame_size, SpeexStereoState *stereo);
00082 
00084 int speex_std_stereo_request_handler(SpeexBits *bits, void *state, void *data);
00085 
00086 #ifdef __cplusplus
00087 }
00088 #endif
00089 
00091 #endif

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