83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/******************************************************************************
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*
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* Copyright 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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