| /****************************************************************************** |
| * |
| * Copyright 2014 The Android Open Source Project |
| * Copyright 2003 - 2004 Open Interface North America, Inc. All rights |
| * reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #include <stdlib.h> |
| |
| #include "oi_codec_sbc_private.h" |
| |
| /******************************************************************************* |
| $Revision: #1 $ |
| ******************************************************************************/ |
| |
| PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT* common, |
| uint32_t* codecDataAligned, |
| uint32_t codecDataBytes, |
| uint8_t maxChannels, uint8_t pcmStride) { |
| int i; |
| size_t filterBufferCount; |
| size_t subdataSize; |
| OI_BYTE* codecData = (OI_BYTE*)codecDataAligned; |
| |
| if (maxChannels < 1 || maxChannels > 2) { |
| return OI_STATUS_INVALID_PARAMETERS; |
| } |
| |
| if (pcmStride < 1 || pcmStride > maxChannels) { |
| return OI_STATUS_INVALID_PARAMETERS; |
| } |
| |
| common->maxChannels = maxChannels; |
| common->pcmStride = pcmStride; |
| |
| /* Compute sizes needed for the memory regions, and bail if we don't have |
| * enough memory for them. */ |
| subdataSize = |
| maxChannels * sizeof(common->subdata[0]) * SBC_MAX_BANDS * SBC_MAX_BLOCKS; |
| if (subdataSize > codecDataBytes) { |
| return OI_STATUS_OUT_OF_MEMORY; |
| } |
| |
| filterBufferCount = |
| (codecDataBytes - subdataSize) / |
| (sizeof(common->filterBuffer[0][0]) * SBC_MAX_BANDS * maxChannels); |
| if (filterBufferCount < SBC_CODEC_MIN_FILTER_BUFFERS) { |
| return OI_STATUS_OUT_OF_MEMORY; |
| } |
| common->filterBufferLen = filterBufferCount * SBC_MAX_BANDS; |
| |
| /* Allocate memory for the subband data */ |
| common->subdata = (int32_t*)codecData; |
| codecData += subdataSize; |
| OI_ASSERT(codecDataBytes >= subdataSize); |
| codecDataBytes -= subdataSize; |
| |
| /* Allocate memory for the synthesis buffers */ |
| for (i = 0; i < maxChannels; ++i) { |
| size_t allocSize = |
| common->filterBufferLen * sizeof(common->filterBuffer[0][0]); |
| common->filterBuffer[i] = (SBC_BUFFER_T*)codecData; |
| OI_ASSERT(codecDataBytes >= allocSize); |
| codecData += allocSize; |
| codecDataBytes -= allocSize; |
| } |
| |
| return OI_OK; |
| } |