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/******************************************************************************
*
* Copyright (C) 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;
}
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