12c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/* 22c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Copyright (C) 2004-2010 NXP Software 32c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Copyright (C) 2010 The Android Open Source Project 42c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 52c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Licensed under the Apache License, Version 2.0 (the "License"); 62c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * you may not use this file except in compliance with the License. 72c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * You may obtain a copy of the License at 82c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 92c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * http://www.apache.org/licenses/LICENSE-2.0 102c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 112c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Unless required by applicable law or agreed to in writing, software 122c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * distributed under the License is distributed on an "AS IS" BASIS, 132c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 142c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * See the License for the specific language governing permissions and 152c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * limitations under the License. 162c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent */ 172c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 182c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/********************************************************************************** 192c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent INCLUDE FILES 202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent***********************************************************************************/ 212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "VectorArithmetic.h" 232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/********************************************************************************** 252c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent FUNCTION DelayMix_16x16 262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent***********************************************************************************/ 272c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 282c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurentvoid DelayMix_16x16(const LVM_INT16 *src, /* Source 1, to be delayed */ 292c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *delay, /* Delay buffer */ 302c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 size, /* Delay size */ 312c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *dst, /* Source/destination */ 322c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pOffset, /* Delay offset */ 332c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 n) /* Number of stereo samples */ 342c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent{ 352c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 i; 362c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 Offset = *pOffset; 372c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 temp; 382c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 392c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent for (i=0; i<n; i++) 402c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 412c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Left channel */ 422c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent temp = (LVM_INT16)((LVM_UINT32)((LVM_INT32)(*dst) + (LVM_INT32)delay[Offset]) >> 1); 432c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *dst = temp; 442c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent dst++; 452c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 462c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent delay[Offset] = *src; 472c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Offset++; 482c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent src++; 492c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 502c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 512c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Right channel */ 522c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent temp = (LVM_INT16)((LVM_UINT32)((LVM_INT32)(*dst) - (LVM_INT32)delay[Offset]) >> 1); 532c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *dst = temp; 542c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent dst++; 552c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 562c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent delay[Offset] = *src; 572c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Offset++; 582c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent src++; 592c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 602c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Make the reverb delay buffer a circular buffer */ 612c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent if (Offset >= size) 622c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 632c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Offset = 0; 642c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 652c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 662c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 672c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Update the offset */ 682c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *pOffset = Offset; 692c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 702c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent return; 712c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent} 722c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 732c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/**********************************************************************************/ 74