android_sles_conversions.h revision 262059f71a68edc5e510427c63f5f1623d3672a8 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "math.h"
18
19//-----------------------------------------------------------------------------
20// Android to OpenSL ES
21//----------------------
22static inline SLuint32 android_to_sles_streamType(int type) {
23    return (SLuint32) type;
24}
25
26
27static inline SLuint32 android_to_sles_sampleRate(uint32_t srHz) {
28    // convert to milliHertz
29    return (SLuint32) srHz*1000;
30}
31
32
33//-----------------------------------------------------------------------------
34// OpenSL ES to Android
35//----------------------
36static inline int sles_to_android_streamType(SLuint32 type) {
37    return (int)type;
38}
39
40
41static inline uint32_t sles_to_android_sampleRate(SLuint32 sampleRateMilliHertz) {
42    return (uint32_t)(sampleRateMilliHertz / 1000);
43}
44
45static inline int sles_to_android_sampleFormat(SLuint32 pcmFormat) {
46    switch (pcmFormat) {
47        case SL_PCMSAMPLEFORMAT_FIXED_16:
48            return android::AudioSystem::PCM_16_BIT;
49            break;
50        case SL_PCMSAMPLEFORMAT_FIXED_8:
51            return android::AudioSystem::PCM_8_BIT;
52            break;
53        case SL_PCMSAMPLEFORMAT_FIXED_20:
54        case SL_PCMSAMPLEFORMAT_FIXED_24:
55        case SL_PCMSAMPLEFORMAT_FIXED_28:
56        case SL_PCMSAMPLEFORMAT_FIXED_32:
57        default:
58            return android::AudioSystem::INVALID_FORMAT;
59    }
60}
61
62
63static inline int sles_to_android_channelMaskIn(SLuint32 nbChannels, SLuint32 channelMask) {
64    // FIXME handle channel mask mapping between SL ES and Android
65    return (nbChannels == 1 ?
66            android::AudioSystem::CHANNEL_IN_MONO :
67            android::AudioSystem::CHANNEL_IN_STEREO);
68}
69
70
71static inline int sles_to_android_channelMaskOut(SLuint32 nbChannels, SLuint32 channelMask) {
72    // FIXME handle channel mask mapping between SL ES and Android
73    return (nbChannels == 1 ?
74            android::AudioSystem::CHANNEL_OUT_MONO :
75            android::AudioSystem::CHANNEL_OUT_STEREO);
76}
77
78
79static inline float sles_to_android_amplification(SLmillibel level) {
80    // FIXME use the FX Framework conversions
81    return pow(10, (float)level/2000);
82}
83