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 PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT *common, 33 OI_UINT32 *codecDataAligned, 34 OI_UINT32 codecDataBytes, 35 OI_UINT8 maxChannels, 36 OI_UINT8 pcmStride) 37 { 38 int i; 39 size_t filterBufferCount; 40 size_t subdataSize; 41 OI_BYTE *codecData = (OI_BYTE*)codecDataAligned; 42 43 if (maxChannels < 1 || maxChannels > 2) { 44 return OI_STATUS_INVALID_PARAMETERS; 45 } 46 47 if (pcmStride < 1 || pcmStride > maxChannels) { 48 return OI_STATUS_INVALID_PARAMETERS; 49 } 50 51 common->maxChannels = maxChannels; 52 common->pcmStride = pcmStride; 53 54 /* Compute sizes needed for the memory regions, and bail if we don't have 55 * enough memory for them. */ 56 subdataSize = maxChannels * sizeof(common->subdata[0]) * SBC_MAX_BANDS * SBC_MAX_BLOCKS; 57 if (subdataSize > codecDataBytes) { 58 return OI_STATUS_OUT_OF_MEMORY; 59 } 60 61 filterBufferCount = (codecDataBytes - subdataSize) / (sizeof(common->filterBuffer[0][0]) * SBC_MAX_BANDS * maxChannels); 62 if (filterBufferCount < SBC_CODEC_MIN_FILTER_BUFFERS) { 63 return OI_STATUS_OUT_OF_MEMORY; 64 } 65 common->filterBufferLen = filterBufferCount * SBC_MAX_BANDS; 66 67 /* Allocate memory for the subband data */ 68 common->subdata = (OI_INT32*)codecData; 69 codecData += subdataSize; 70 OI_ASSERT(codecDataBytes >= subdataSize); 71 codecDataBytes -= subdataSize; 72 73 /* Allocate memory for the synthesis buffers */ 74 for (i = 0; i < maxChannels; ++i) { 75 size_t allocSize = common->filterBufferLen * sizeof(common->filterBuffer[0][0]); 76 common->filterBuffer[i] = (SBC_BUFFER_T*)codecData; 77 OI_ASSERT(codecDataBytes >= allocSize); 78 codecData += allocSize; 79 codecDataBytes -= allocSize; 80 } 81 82 return OI_OK; 83 } 84