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 #include "common/bt_target.h"
20 #include <stdlib.h>
21 #include <oi_codec_sbc_private.h>
22
23 #if (defined(SBC_DEC_INCLUDED) && SBC_DEC_INCLUDED == TRUE)
24
25 /**********************************************************************************
26 $Revision: #1 $
27 ***********************************************************************************/
28
OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT * common,OI_UINT32 * codecDataAligned,OI_UINT32 codecDataBytes,OI_UINT8 maxChannels,OI_UINT8 pcmStride)29 PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT *common,
30 OI_UINT32 *codecDataAligned,
31 OI_UINT32 codecDataBytes,
32 OI_UINT8 maxChannels,
33 OI_UINT8 pcmStride)
34 {
35 int i;
36 size_t filterBufferCount;
37 size_t subdataSize;
38 OI_BYTE *codecData = (OI_BYTE *)codecDataAligned;
39
40 if (maxChannels < 1 || maxChannels > 2) {
41 return OI_STATUS_INVALID_PARAMETERS;
42 }
43
44 if (pcmStride < 1 || pcmStride > maxChannels) {
45 return OI_STATUS_INVALID_PARAMETERS;
46 }
47
48 common->maxChannels = maxChannels;
49 common->pcmStride = pcmStride;
50
51 /* Compute sizes needed for the memory regions, and bail if we don't have
52 * enough memory for them. */
53 subdataSize = maxChannels * sizeof(common->subdata[0]) * SBC_MAX_BANDS * SBC_MAX_BLOCKS;
54 if (subdataSize > codecDataBytes) {
55 return OI_STATUS_OUT_OF_MEMORY;
56 }
57
58 filterBufferCount = (codecDataBytes - subdataSize) / (sizeof(common->filterBuffer[0][0]) * SBC_MAX_BANDS * maxChannels);
59 if (filterBufferCount < SBC_CODEC_MIN_FILTER_BUFFERS) {
60 return OI_STATUS_OUT_OF_MEMORY;
61 }
62 common->filterBufferLen = filterBufferCount * SBC_MAX_BANDS;
63
64 /* Allocate memory for the subband data */
65 common->subdata = (OI_INT32 *)codecData;
66 codecData += subdataSize;
67 OI_ASSERT(codecDataBytes >= subdataSize);
68 codecDataBytes -= subdataSize;
69
70 /* Allocate memory for the synthesis buffers */
71 for (i = 0; i < maxChannels; ++i) {
72 size_t allocSize = common->filterBufferLen * sizeof(common->filterBuffer[0][0]);
73 common->filterBuffer[i] = (SBC_BUFFER_T *)codecData;
74 OI_ASSERT(codecDataBytes >= allocSize);
75 codecData += allocSize;
76 codecDataBytes -= allocSize;
77 }
78
79 return OI_OK;
80 }
81
82 #endif /* #if (defined(SBC_DEC_INCLUDED) && SBC_DEC_INCLUDED == TRUE) */
83
