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      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 //----------------------
     22 static inline SLuint32 android_to_sles_streamType(int type) {
     23     return (SLuint32) type;
     24 }
     25 
     26 
     27 static 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 //----------------------
     36 static inline int sles_to_android_streamType(SLuint32 type) {
     37     return (int)type;
     38 }
     39 
     40 
     41 static inline uint32_t sles_to_android_sampleRate(SLuint32 sampleRateMilliHertz) {
     42     return (uint32_t)(sampleRateMilliHertz / 1000);
     43 }
     44 
     45 static 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 
     63 static 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 
     71 static 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 
     79 static inline float sles_to_android_amplification(SLmillibel level) {
     80     // FIXME use the FX Framework conversions
     81     return pow(10, (float)level/2000);
     82 }
     83