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