blob: 24282138a552a1e191b7b0f606a0198c0ac0dade
| 1 | /* ***** BEGIN LICENSE BLOCK ***** |
| 2 | * Source last modified: $Id: buffers.c,v 1.1.2.1 2005/02/26 02:05:12 jrecker Exp $ |
| 3 | * |
| 4 | * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved. |
| 5 | * |
| 6 | * The contents of this file, and the files included with this file, |
| 7 | * are subject to the current version of the RealNetworks Public |
| 8 | * Source License (the "RPSL") available at |
| 9 | * http://www.helixcommunity.org/content/rpsl unless you have licensed |
| 10 | * the file under the current version of the RealNetworks Community |
| 11 | * Source License (the "RCSL") available at |
| 12 | * http://www.helixcommunity.org/content/rcsl, in which case the RCSL |
| 13 | * will apply. You may also obtain the license terms directly from |
| 14 | * RealNetworks. You may not use this file except in compliance with |
| 15 | * the RPSL or, if you have a valid RCSL with RealNetworks applicable |
| 16 | * to this file, the RCSL. Please see the applicable RPSL or RCSL for |
| 17 | * the rights, obligations and limitations governing use of the |
| 18 | * contents of the file. |
| 19 | * |
| 20 | * This file is part of the Helix DNA Technology. RealNetworks is the |
| 21 | * developer of the Original Code and owns the copyrights in the |
| 22 | * portions it created. |
| 23 | * |
| 24 | * This file, and the files included with this file, is distributed |
| 25 | * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY |
| 26 | * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS |
| 27 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES |
| 28 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET |
| 29 | * ENJOYMENT OR NON-INFRINGEMENT. |
| 30 | * |
| 31 | * Technology Compatibility Kit Test Suite(s) Location: |
| 32 | * http://www.helixcommunity.org/content/tck |
| 33 | * |
| 34 | * Contributor(s): |
| 35 | * |
| 36 | * ***** END LICENSE BLOCK ***** */ |
| 37 | |
| 38 | /************************************************************************************** |
| 39 | * Fixed-point HE-AAC decoder |
| 40 | * Jon Recker (jrecker@real.com) |
| 41 | * February 2005 |
| 42 | * |
| 43 | * buffers.c - allocation and deallocation of internal AAC decoder buffers |
| 44 | **************************************************************************************/ |
| 45 | |
| 46 | #ifdef USE_DEFAULT_STDLIB |
| 47 | #include <stdlib.h> |
| 48 | #else |
| 49 | #include "hlxclib/stdlib.h" |
| 50 | #endif |
| 51 | |
| 52 | #include "coder.h" |
| 53 | |
| 54 | /************************************************************************************** |
| 55 | * Function: ClearBuffer |
| 56 | * |
| 57 | * Description: fill buffer with 0's |
| 58 | * |
| 59 | * Inputs: pointer to buffer |
| 60 | * number of bytes to fill with 0 |
| 61 | * |
| 62 | * Outputs: cleared buffer |
| 63 | * |
| 64 | * Return: none |
| 65 | * |
| 66 | * Notes: slow, platform-independent equivalent to memset(buf, 0, nBytes) |
| 67 | **************************************************************************************/ |
| 68 | void ClearBuffer(void *buf, int nBytes) |
| 69 | { |
| 70 | int i; |
| 71 | unsigned char *cbuf = (unsigned char *)buf; |
| 72 | |
| 73 | for (i = 0; i < nBytes; i++) { |
| 74 | cbuf[i] = 0; |
| 75 | } |
| 76 | |
| 77 | return; |
| 78 | } |
| 79 | |
| 80 | /************************************************************************************** |
| 81 | * Function: AllocateBuffers |
| 82 | * |
| 83 | * Description: allocate all the memory needed for the AAC decoder |
| 84 | * |
| 85 | * Inputs: none |
| 86 | * |
| 87 | * Outputs: none |
| 88 | * |
| 89 | * Return: pointer to AACDecInfo structure, cleared to all 0's (except for |
| 90 | * pointer to platform-specific data structure) |
| 91 | * |
| 92 | * Notes: if one or more mallocs fail, function frees any buffers already |
| 93 | * allocated before returning |
| 94 | **************************************************************************************/ |
| 95 | AACDecInfo *AllocateBuffers(void) |
| 96 | { |
| 97 | AACDecInfo *aacDecInfo; |
| 98 | |
| 99 | aacDecInfo = (AACDecInfo *)malloc(sizeof(AACDecInfo)); |
| 100 | if (!aacDecInfo) { |
| 101 | return 0; |
| 102 | } |
| 103 | ClearBuffer(aacDecInfo, sizeof(AACDecInfo)); |
| 104 | |
| 105 | aacDecInfo->psInfoBase = malloc(sizeof(PSInfoBase)); |
| 106 | if (!aacDecInfo->psInfoBase) { |
| 107 | FreeBuffers(aacDecInfo); |
| 108 | return 0; |
| 109 | } |
| 110 | ClearBuffer(aacDecInfo->psInfoBase, sizeof(PSInfoBase)); |
| 111 | |
| 112 | return aacDecInfo; |
| 113 | } |
| 114 | |
| 115 | #ifndef SAFE_FREE |
| 116 | #define SAFE_FREE(x) {if (x) free(x); (x) = 0;} /* helper macro */ |
| 117 | #endif |
| 118 | |
| 119 | /************************************************************************************** |
| 120 | * Function: FreeBuffers |
| 121 | * |
| 122 | * Description: frees all the memory used by the AAC decoder |
| 123 | * |
| 124 | * Inputs: pointer to initialized AACDecInfo structure |
| 125 | * |
| 126 | * Outputs: none |
| 127 | * |
| 128 | * Return: none |
| 129 | * |
| 130 | * Notes: safe to call even if some buffers were not allocated (uses SAFE_FREE) |
| 131 | **************************************************************************************/ |
| 132 | void FreeBuffers(AACDecInfo *aacDecInfo) |
| 133 | { |
| 134 | if (!aacDecInfo) { |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | SAFE_FREE(aacDecInfo->psInfoBase); |
| 139 | SAFE_FREE(aacDecInfo); |
| 140 | } |
| 141 |