ref: 58d80ab9ea3b2d54042debb445c08bf490758fce
dir: /celt/pitch.h/
/* Copyright (c) 2007-2008 CSIRO Copyright (c) 2007-2009 Xiph.Org Foundation Written by Jean-Marc Valin */ /** @file pitch.h @brief Pitch analysis */ /* 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. 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 COPYRIGHT OWNER 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 PITCH_H #define PITCH_H #include "modes.h" void pitch_downsample(celt_sig * OPUS_RESTRICT x[], opus_val16 * OPUS_RESTRICT x_lp, int len, int C); void pitch_search(const opus_val16 * OPUS_RESTRICT x_lp, opus_val16 * OPUS_RESTRICT y, int len, int max_pitch, int *pitch); opus_val16 remove_doubling(opus_val16 *x, int maxperiod, int minperiod, int N, int *T0, int prev_period, opus_val16 prev_gain); /* OPT: This is the kernel you really want to optimize. It gets used a lot by the prefilter and by the PLC. */ static inline void xcorr_kernel(const opus_val16 * x, const opus_val16 * y, opus_val32 sum[4], int len) { int j; opus_val16 y_0, y_1, y_2, y_3; y_3=0; /* gcc doesn't realize that y_3 can't be used uninitialized */ y_0=*y++; y_1=*y++; y_2=*y++; for (j=0;j<len-3;j+=4) { opus_val16 tmp; tmp = *x++; y_3=*y++; sum[0] = MAC16_16(sum[0],tmp,y_0); sum[1] = MAC16_16(sum[1],tmp,y_1); sum[2] = MAC16_16(sum[2],tmp,y_2); sum[3] = MAC16_16(sum[3],tmp,y_3); tmp=*x++; y_0=*y++; sum[0] = MAC16_16(sum[0],tmp,y_1); sum[1] = MAC16_16(sum[1],tmp,y_2); sum[2] = MAC16_16(sum[2],tmp,y_3); sum[3] = MAC16_16(sum[3],tmp,y_0); tmp=*x++; y_1=*y++; sum[0] = MAC16_16(sum[0],tmp,y_2); sum[1] = MAC16_16(sum[1],tmp,y_3); sum[2] = MAC16_16(sum[2],tmp,y_0); sum[3] = MAC16_16(sum[3],tmp,y_1); tmp=*x++; y_2=*y++; sum[0] = MAC16_16(sum[0],tmp,y_3); sum[1] = MAC16_16(sum[1],tmp,y_0); sum[2] = MAC16_16(sum[2],tmp,y_1); sum[3] = MAC16_16(sum[3],tmp,y_2); } if (j++<len) { opus_val16 tmp = *x++; y_3=*y++; sum[0] = MAC16_16(sum[0],tmp,y_0); sum[1] = MAC16_16(sum[1],tmp,y_1); sum[2] = MAC16_16(sum[2],tmp,y_2); sum[3] = MAC16_16(sum[3],tmp,y_3); } if (j++<len) { opus_val16 tmp=*x++; y_0=*y++; sum[0] = MAC16_16(sum[0],tmp,y_1); sum[1] = MAC16_16(sum[1],tmp,y_2); sum[2] = MAC16_16(sum[2],tmp,y_3); sum[3] = MAC16_16(sum[3],tmp,y_0); } if (j<len) { opus_val16 tmp=*x++; y_1=*y++; sum[0] = MAC16_16(sum[0],tmp,y_2); sum[1] = MAC16_16(sum[1],tmp,y_3); sum[2] = MAC16_16(sum[2],tmp,y_0); sum[3] = MAC16_16(sum[3],tmp,y_1); } } #ifdef FIXED_POINT opus_val32 #else void #endif pitch_xcorr(opus_val16 *_x, opus_val16 *_y, opus_val32 *xcorr, int len, int max_pitch); #endif