198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* Copyright (C) 2002 Jean-Marc Valin 298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project File: stereo.c 398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project Redistribution and use in source and binary forms, with or without 598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project modification, are permitted provided that the following conditions 698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project are met: 798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions of source code must retain the above copyright 998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer. 1098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions in binary form must reproduce the above copyright 1298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer in the 1398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project documentation and/or other materials provided with the distribution. 1498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Neither the name of the Xiph.org Foundation nor the names of its 1698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project contributors may be used to endorse or promote products derived from 1798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project this software without specific prior written permission. 1898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 2398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 2998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/ 3198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef HAVE_CONFIG_H 3398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "config.h" 3498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 3598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex_stereo.h> 3798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex_callbacks.h> 3898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "math_approx.h" 3998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "vq.h" 4098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <math.h> 4198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "os_support.h" 4298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projecttypedef struct RealSpeexStereoState { 4498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t balance; /**< Left/right balance info */ 4598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t e_ratio; /**< Ratio of energies: E(left+right)/[E(left)+E(right)] */ 4698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t smooth_left; /**< Smoothed left channel gain */ 4798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t smooth_right; /**< Smoothed right channel gain */ 4898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_uint32_t reserved1; /**< Reserved for future use */ 4998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_int32_t reserved2; /**< Reserved for future use */ 5098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} RealSpeexStereoState; 5198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 5298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 5398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/*float e_ratio_quant[4] = {1, 1.26, 1.587, 2};*/ 5498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef FIXED_POINT 5598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic const float e_ratio_quant[4] = {.25f, .315f, .397f, .5f}; 5698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic const float e_ratio_quant_bounds[3] = {0.2825f, 0.356f, 0.4485f}; 5798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 5898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic const spx_word16_t e_ratio_quant[4] = {8192, 10332, 13009, 16384}; 5998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic const spx_word16_t e_ratio_quant_bounds[3] = {9257, 11665, 14696}; 6098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic const spx_word16_t balance_bounds[31] = {18, 23, 30, 38, 49, 63, 81, 104, 6198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 134, 172, 221, 284, 364, 468, 600, 771, 6298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 990, 1271, 1632, 2096, 2691, 3455, 4436, 5696, 6398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7314, 9392, 12059, 15484, 19882, 25529, 32766}; 6498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 6598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* This is an ugly compatibility hack that properly resets the stereo state 6798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project In case it it compiled in fixed-point, but initialised with the deprecated 6898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project floating point static initialiser */ 6998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 7098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define COMPATIBILITY_HACK(s) do {if ((s)->reserved1 != 0xdeadbeef) speex_stereo_state_reset((SpeexStereoState*)s); } while (0); 7198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 7298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define COMPATIBILITY_HACK(s) 7398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 7498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT SpeexStereoState *speex_stereo_state_init() 7698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 7798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SpeexStereoState *stereo = speex_alloc(sizeof(SpeexStereoState)); 7898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_stereo_state_reset(stereo); 7998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return stereo; 8098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 8198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 8298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_stereo_state_reset(SpeexStereoState *_stereo) 8398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 8498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project RealSpeexStereoState *stereo = (RealSpeexStereoState*)_stereo; 8598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 8698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->balance = 65536; 8798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->e_ratio = 16384; 8898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_left = 16384; 8998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_right = 16384; 9098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->reserved1 = 0xdeadbeef; 9198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->reserved2 = 0; 9298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 9398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->balance = 1.0f; 9498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->e_ratio = .5f; 9598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_left = 1.f; 9698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_right = 1.f; 9798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->reserved1 = 0; 9898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->reserved2 = 0; 9998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 10098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 10198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 10298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_stereo_state_destroy(SpeexStereoState *stereo) 10398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 10498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_free(stereo); 10598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 10698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 10798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef DISABLE_FLOAT_API 10898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_encode_stereo(float *data, int frame_size, SpeexBits *bits) 10998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 11098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i, tmp; 11198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project float e_left=0, e_right=0, e_tot=0; 11298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project float balance, e_ratio; 11398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=0;i<frame_size;i++) 11498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 11598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_left += ((float)data[2*i])*data[2*i]; 11698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_right += ((float)data[2*i+1])*data[2*i+1]; 11798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[i] = .5*(((float)data[2*i])+data[2*i+1]); 11898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_tot += ((float)data[i])*data[i]; 11998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 12098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=(e_left+1)/(e_right+1); 12198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_ratio = e_tot/(1+e_left+e_right); 12298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*Quantization*/ 12498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 14, 5); 12598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, SPEEX_INBAND_STEREO, 4); 12698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=4*log(balance); 12898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*Pack sign*/ 13098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (balance>0) 13198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 0, 1); 13298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project else 13398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 1, 1); 13498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=floor(.5+fabs(balance)); 13598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (balance>30) 13698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=31; 13798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 13898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, (int)balance, 5); 13998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 14098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* FIXME: this is a hack */ 14198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project tmp=scal_quant(e_ratio*Q15_ONE, e_ratio_quant_bounds, 4); 14298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, tmp, 2); 14398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 14498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif /* #ifndef DISABLE_FLOAT_API */ 14598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 14698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_encode_stereo_int(spx_int16_t *data, int frame_size, SpeexBits *bits) 14798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 14898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i, tmp; 14998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t e_left=0, e_right=0, e_tot=0; 15098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t balance, e_ratio; 15198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t largest, smallest; 15298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int balance_id; 15398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 15498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int shift; 15598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 15698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 15798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* In band marker */ 15898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 14, 5); 15998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* Stereo marker */ 16098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, SPEEX_INBAND_STEREO, 4); 16198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 16298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=0;i<frame_size;i++) 16398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 16498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_left += SHR32(MULT16_16(data[2*i],data[2*i]),8); 16598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_right += SHR32(MULT16_16(data[2*i+1],data[2*i+1]),8); 16698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 16798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* I think this is actually unbiased */ 16898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[i] = SHR16(data[2*i],1)+PSHR16(data[2*i+1],1); 16998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 17098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[i] = .5*(((float)data[2*i])+data[2*i+1]); 17198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 17298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_tot += SHR32(MULT16_16(data[i],data[i]),8); 17398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 17498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (e_left > e_right) 17598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 17698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 0, 1); 17798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project largest = e_left; 17898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project smallest = e_right; 17998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } else { 18098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, 1, 1); 18198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project largest = e_right; 18298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project smallest = e_left; 18398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 18498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 18598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* Balance quantization */ 18698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 18798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project shift = spx_ilog2(largest)-15; 18898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project largest = VSHR32(largest, shift-4); 18998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project smallest = VSHR32(smallest, shift); 19098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance = DIV32(largest, ADD32(smallest, 1)); 19198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (balance > 32767) 19298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance = 32767; 19398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance_id = scal_quant(EXTRACT16(balance), balance_bounds, 32); 19498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 19598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=(largest+1.)/(smallest+1.); 19698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=4*log(balance); 19798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance_id=floor(.5+fabs(balance)); 19898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (balance_id>30) 19998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance_id=31; 20098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 20198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 20298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, balance_id, 5); 20398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 20498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* "coherence" quantisation */ 20598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 20698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project shift = spx_ilog2(e_tot); 20798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_tot = VSHR32(e_tot, shift-25); 20898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_left = VSHR32(e_left, shift-10); 20998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_right = VSHR32(e_right, shift-10); 21098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_ratio = DIV32(e_tot, e_left+e_right+1); 21198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 21298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_ratio = e_tot/(1.+e_left+e_right); 21398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 21498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 21598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project tmp=scal_quant(EXTRACT16(e_ratio), e_ratio_quant_bounds, 4); 21698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*fprintf (stderr, "%d %d %d %d\n", largest, smallest, balance_id, e_ratio);*/ 21798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_bits_pack(bits, tmp, 2); 21898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 21998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 22098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef DISABLE_FLOAT_API 22198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_decode_stereo(float *data, int frame_size, SpeexStereoState *_stereo) 22298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 22398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i; 22498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t balance; 22598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word16_t e_left, e_right, e_ratio; 22698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project RealSpeexStereoState *stereo = (RealSpeexStereoState*)_stereo; 22798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 22898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project COMPATIBILITY_HACK(stereo); 22998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 23098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=stereo->balance; 23198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_ratio=stereo->e_ratio; 23298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 23398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* These two are Q14, with max value just below 2. */ 23498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_right = DIV32(QCONST32(1., 22), spx_sqrt(MULT16_32_Q15(e_ratio, ADD32(QCONST32(1., 16), balance)))); 23598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_left = SHR32(MULT16_16(spx_sqrt(balance), e_right), 8); 23698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 23798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=frame_size-1;i>=0;i--) 23898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 23998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word16_t tmp=data[i]; 24098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_left = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_left, QCONST16(0.98, 15)), e_left, QCONST16(0.02, 15)), 15)); 24198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_right = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_right, QCONST16(0.98, 15)), e_right, QCONST16(0.02, 15)), 15)); 24298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[2*i] = (float)MULT16_16_P14(stereo->smooth_left, tmp); 24398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[2*i+1] = (float)MULT16_16_P14(stereo->smooth_right, tmp); 24498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 24598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 24698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif /* #ifndef DISABLE_FLOAT_API */ 24798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 24898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_decode_stereo_int(spx_int16_t *data, int frame_size, SpeexStereoState *_stereo) 24998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 25098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i; 25198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word32_t balance; 25298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word16_t e_left, e_right, e_ratio; 25398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project RealSpeexStereoState *stereo = (RealSpeexStereoState*)_stereo; 25498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 25598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project COMPATIBILITY_HACK(stereo); 25698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 25798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project balance=stereo->balance; 25898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_ratio=stereo->e_ratio; 25998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 26098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* These two are Q14, with max value just below 2. */ 26198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_right = DIV32(QCONST32(1., 22), spx_sqrt(MULT16_32_Q15(e_ratio, ADD32(QCONST32(1., 16), balance)))); 26298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project e_left = SHR32(MULT16_16(spx_sqrt(balance), e_right), 8); 26398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 26498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=frame_size-1;i>=0;i--) 26598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 26698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_int16_t tmp=data[i]; 26798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_left = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_left, QCONST16(0.98, 15)), e_left, QCONST16(0.02, 15)), 15)); 26898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->smooth_right = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_right, QCONST16(0.98, 15)), e_right, QCONST16(0.02, 15)), 15)); 26998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[2*i] = (spx_int16_t)MULT16_16_P14(stereo->smooth_left, tmp); 27098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project data[2*i+1] = (spx_int16_t)MULT16_16_P14(stereo->smooth_right, tmp); 27198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 27298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 27398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 27498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT int speex_std_stereo_request_handler(SpeexBits *bits, void *state, void *data) 27598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 27698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project RealSpeexStereoState *stereo; 27798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_word16_t sign=1, dexp; 27898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int tmp; 27998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 28098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo = (RealSpeexStereoState*)data; 28198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 28298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project COMPATIBILITY_HACK(stereo); 28398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 28498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (speex_bits_unpack_unsigned(bits, 1)) 28598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project sign=-1; 28698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project dexp = speex_bits_unpack_unsigned(bits, 5); 28798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef FIXED_POINT 28898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->balance = exp(sign*.25*dexp); 28998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 29098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->balance = spx_exp(MULT16_16(sign, SHL16(dexp, 9))); 29198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 29298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project tmp = speex_bits_unpack_unsigned(bits, 2); 29398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project stereo->e_ratio = e_ratio_quant[tmp]; 29498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 29598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return 0; 29698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 297