android_media_AudioFormat.h revision ff0d9f098e51c54e1a030ed21fd980680cb7b405
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