blob: 1a118132a77ad6e46cf4b440e0a7e5762ae6ee2d
| 1 | /* ***** BEGIN LICENSE BLOCK ***** |
| 2 | * Source last modified: $Id: aac_reorder.c,v 1.1.1.1.2.1 2005/05/04 18:21:58 hubbe Exp $ |
| 3 | * |
| 4 | * REALNETWORKS CONFIDENTIAL--NOT FOR DISTRIBUTION IN SOURCE CODE FORM |
| 5 | * Portions Copyright (c) 1995-2005 RealNetworks, Inc. |
| 6 | * All Rights Reserved. |
| 7 | * |
| 8 | * The contents of this file, and the files included with this file, |
| 9 | * are subject to the current version of the Real Format Source Code |
| 10 | * Porting and Optimization License, available at |
| 11 | * https://helixcommunity.org/2005/license/realformatsource (unless |
| 12 | * RealNetworks otherwise expressly agrees in writing that you are |
| 13 | * subject to a different license). You may also obtain the license |
| 14 | * terms directly from RealNetworks. You may not use this file except |
| 15 | * in compliance with the Real Format Source Code Porting and |
| 16 | * Optimization License. There are no redistribution rights for the |
| 17 | * source code of this file. Please see the Real Format Source Code |
| 18 | * Porting and Optimization License for the rights, obligations and |
| 19 | * limitations governing use of the contents of the file. |
| 20 | * |
| 21 | * RealNetworks is the developer of the Original Code and owns the |
| 22 | * copyrights in the portions it created. |
| 23 | * |
| 24 | * This file, and the files included with this file, is distributed and |
| 25 | * made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL |
| 27 | * SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
| 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT |
| 29 | * OR NON-INFRINGEMENT. |
| 30 | * |
| 31 | * Technology Compatibility Kit Test Suite(s) Location: |
| 32 | * https://rarvcode-tck.helixcommunity.org |
| 33 | * |
| 34 | * Contributor(s): |
| 35 | * |
| 36 | * ***** END LICENSE BLOCK ***** */ |
| 37 | |
| 38 | #include "aac_reorder.h" |
| 39 | |
| 40 | void AACReorderPCMChannels(INT16 *pcmBuf, int nSamps, int nChans) |
| 41 | { |
| 42 | int i, ch, chanMap[6]; |
| 43 | INT16 tmpBuf[6]; |
| 44 | |
| 45 | switch (nChans) { |
| 46 | case 3: |
| 47 | chanMap[0] = 1; /* L */ |
| 48 | chanMap[1] = 2; /* R */ |
| 49 | chanMap[2] = 0; /* C */ |
| 50 | break; |
| 51 | case 4: |
| 52 | chanMap[0] = 1; /* L */ |
| 53 | chanMap[1] = 2; /* R */ |
| 54 | chanMap[2] = 0; /* C */ |
| 55 | chanMap[3] = 3; /* S */ |
| 56 | break; |
| 57 | case 5: |
| 58 | chanMap[0] = 1; /* L */ |
| 59 | chanMap[1] = 2; /* R */ |
| 60 | chanMap[2] = 0; /* C */ |
| 61 | chanMap[3] = 3; /* LS */ |
| 62 | chanMap[4] = 4; /* RS */ |
| 63 | break; |
| 64 | case 6: |
| 65 | chanMap[0] = 1; /* L */ |
| 66 | chanMap[1] = 2; /* R */ |
| 67 | chanMap[2] = 0; /* C */ |
| 68 | chanMap[3] = 5; /* LFE */ |
| 69 | chanMap[4] = 3; /* LS */ |
| 70 | chanMap[5] = 4; /* RS */ |
| 71 | break; |
| 72 | default: |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | for (i = 0; i < nSamps; i += nChans) { |
| 77 | for (ch = 0; ch < nChans; ch++) { |
| 78 | tmpBuf[ch] = pcmBuf[chanMap[ch]]; |
| 79 | } |
| 80 | for (ch = 0; ch < nChans; ch++) { |
| 81 | pcmBuf[ch] = tmpBuf[ch]; |
| 82 | } |
| 83 | pcmBuf += nChans; |
| 84 | } |
| 85 | } |
| 86 |