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