1/*
2 * Copyright (C) 2014 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#ifndef ANDROID_MEDIA_AUDIOFORMAT_H
18#define ANDROID_MEDIA_AUDIOFORMAT_H
19
20#include <system/audio.h>
21
22// keep these values in sync with AudioFormat.java
23#define ENCODING_PCM_16BIT  2
24#define ENCODING_PCM_8BIT   3
25#define ENCODING_PCM_FLOAT  4
26#define ENCODING_AC3        5
27#define ENCODING_E_AC3      6
28#define ENCODING_INVALID    0
29#define ENCODING_DEFAULT    1
30
31
32
33#define CHANNEL_INVALID 0
34#define CHANNEL_OUT_DEFAULT 1
35
36static inline audio_format_t audioFormatToNative(int audioFormat)
37{
38    switch (audioFormat) {
39    case ENCODING_PCM_16BIT:
40        return AUDIO_FORMAT_PCM_16_BIT;
41    case ENCODING_PCM_8BIT:
42        return AUDIO_FORMAT_PCM_8_BIT;
43    case ENCODING_PCM_FLOAT:
44        return AUDIO_FORMAT_PCM_FLOAT;
45    case ENCODING_AC3:
46        return AUDIO_FORMAT_AC3;
47    case ENCODING_E_AC3:
48        return AUDIO_FORMAT_E_AC3;
49    case ENCODING_DEFAULT:
50        return AUDIO_FORMAT_DEFAULT;
51    default:
52        return AUDIO_FORMAT_INVALID;
53    }
54}
55
56static inline int audioFormatFromNative(audio_format_t nativeFormat)
57{
58    switch (nativeFormat) {
59    case AUDIO_FORMAT_PCM_16_BIT:
60        return ENCODING_PCM_16BIT;
61    case AUDIO_FORMAT_PCM_8_BIT:
62        return ENCODING_PCM_8BIT;
63    case AUDIO_FORMAT_PCM_FLOAT:
64        return ENCODING_PCM_FLOAT;
65    case AUDIO_FORMAT_AC3:
66        return ENCODING_AC3;
67    case AUDIO_FORMAT_E_AC3:
68        return ENCODING_E_AC3;
69    case AUDIO_FORMAT_DEFAULT:
70        return ENCODING_DEFAULT;
71    default:
72        return ENCODING_INVALID;
73    }
74}
75
76static inline audio_channel_mask_t outChannelMaskToNative(int channelMask)
77{
78    switch (channelMask) {
79    case CHANNEL_OUT_DEFAULT:
80    case CHANNEL_INVALID:
81        return AUDIO_CHANNEL_NONE;
82    default:
83        return (audio_channel_mask_t)(channelMask>>2);
84    }
85}
86
87static inline int outChannelMaskFromNative(audio_channel_mask_t nativeMask)
88{
89    switch (nativeMask) {
90    case AUDIO_CHANNEL_NONE:
91        return CHANNEL_OUT_DEFAULT;
92    default:
93        return (int)nativeMask<<2;
94    }
95}
96
97static inline audio_channel_mask_t inChannelMaskToNative(int channelMask)
98{
99    return (audio_channel_mask_t)channelMask;
100}
101
102static inline int inChannelMaskFromNative(audio_channel_mask_t nativeMask)
103{
104    return (int)nativeMask;
105}
106
107#endif // ANDROID_MEDIA_AUDIOFORMAT_H
108