1 /****************************************************************************** 2 * 3 * Copyright (C) 2014 The Android Open Source Project 4 * Copyright 2003 - 2004 Open Interface North America, Inc. All rights reserved. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at: 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 ******************************************************************************/ 19 20 #include <stdlib.h> 21 #include <oi_codec_sbc_private.h> 22 23 /********************************************************************************** 24 $Revision: #1 $ 25 ***********************************************************************************/ 26 27 PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT *common, 28 OI_UINT32 *codecDataAligned, 29 OI_UINT32 codecDataBytes, 30 OI_UINT8 maxChannels, 31 OI_UINT8 pcmStride) 32 { 33 int i; 34 size_t filterBufferCount; 35 size_t subdataSize; 36 OI_BYTE *codecData = (OI_BYTE*)codecDataAligned; 37 38 if ((maxChannels < 1) || (maxChannels > 2)) { 39 return OI_STATUS_INVALID_PARAMETERS; 40 } 41 42 if ((pcmStride < 1) || (pcmStride > maxChannels)) { 43 return OI_STATUS_INVALID_PARAMETERS; 44 } 45 46 common->maxChannels = maxChannels; 47 common->pcmStride = pcmStride; 48 49 /* Compute sizes needed for the memory regions, and bail if we don't have 50 * enough memory for them. */ 51 subdataSize = maxChannels * sizeof(common->subdata[0]) * SBC_MAX_BANDS * SBC_MAX_BLOCKS; 52 if (subdataSize > codecDataBytes) { 53 return OI_STATUS_OUT_OF_MEMORY; 54 } 55 56 filterBufferCount = (codecDataBytes - subdataSize) / (sizeof(common->filterBuffer[0][0]) * SBC_MAX_BANDS * maxChannels); 57 if (filterBufferCount < SBC_CODEC_MIN_FILTER_BUFFERS) { 58 return OI_STATUS_OUT_OF_MEMORY; 59 } 60 common->filterBufferLen = (uint32_t) filterBufferCount * SBC_MAX_BANDS; 61 62 /* Allocate memory for the subband data */ 63 common->subdata = (OI_INT32*)codecData; 64 codecData += subdataSize; 65 OI_ASSERT(codecDataBytes >= subdataSize); 66 codecDataBytes -= (uint32_t) subdataSize; 67 68 /* Allocate memory for the synthesis buffers */ 69 for (i = 0; i < maxChannels; ++i) { 70 size_t allocSize = common->filterBufferLen * sizeof(common->filterBuffer[0][0]); 71 common->filterBuffer[i] = (SBC_BUFFER_T*)codecData; 72 OI_ASSERT(codecDataBytes >= allocSize); 73 codecData += allocSize; 74 codecDataBytes -= (uint32_t) allocSize; 75 } 76 77 return OI_OK; 78 } 79