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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 /* LEDArray implementation */
     18 
     19 #include "sles_allinclusive.h"
     20 
     21 
     22 static SLresult ILEDArray_ActivateLEDArray(SLLEDArrayItf self, SLuint32 lightMask)
     23 {
     24     SL_ENTER_INTERFACE
     25 
     26     ILEDArray *thiz = (ILEDArray *) self;
     27     interface_lock_poke(thiz);
     28     thiz->mLightMask = lightMask;
     29     interface_unlock_poke(thiz);
     30     result = SL_RESULT_SUCCESS;
     31 
     32     SL_LEAVE_INTERFACE
     33 }
     34 
     35 
     36 static SLresult ILEDArray_IsLEDArrayActivated(SLLEDArrayItf self, SLuint32 *pLightMask)
     37 {
     38     SL_ENTER_INTERFACE
     39 
     40     if (NULL == pLightMask) {
     41         result = SL_RESULT_PARAMETER_INVALID;
     42     } else {
     43         ILEDArray *thiz = (ILEDArray *) self;
     44         interface_lock_peek(thiz);
     45         SLuint32 lightMask = thiz->mLightMask;
     46         interface_unlock_peek(thiz);
     47         *pLightMask = lightMask;
     48         result = SL_RESULT_SUCCESS;
     49     }
     50 
     51     SL_LEAVE_INTERFACE
     52 }
     53 
     54 
     55 static SLresult ILEDArray_SetColor(SLLEDArrayItf self, SLuint8 index, const SLHSL *pColor)
     56 {
     57     SL_ENTER_INTERFACE
     58 
     59     result = SL_RESULT_PARAMETER_INVALID;
     60     do {
     61         if (!(index < MAX_LED_COUNT) || NULL == pColor)
     62             break;
     63         SLHSL color = *pColor;
     64         if (!(0 <= color.hue && color.hue <= 360000))
     65             break;
     66         if (!(0 <= color.saturation && color.saturation <= 1000))
     67             break;
     68         if (!(0 <= color.lightness && color.lightness <= 1000))
     69             break;
     70         ILEDArray *thiz = (ILEDArray *) self;
     71         // can't use poke because struct copy might not be atomic
     72         interface_lock_exclusive(thiz);
     73         thiz->mColors[index] = color;
     74         interface_unlock_exclusive(thiz);
     75         result = SL_RESULT_SUCCESS;
     76     } while (0);
     77 
     78     SL_LEAVE_INTERFACE
     79 }
     80 
     81 
     82 static SLresult ILEDArray_GetColor(SLLEDArrayItf self, SLuint8 index, SLHSL *pColor)
     83 {
     84     SL_ENTER_INTERFACE
     85 
     86     if (!(index < MAX_LED_COUNT) || NULL == pColor) {
     87         result = SL_RESULT_PARAMETER_INVALID;
     88     } else {
     89         ILEDArray *thiz = (ILEDArray *) self;
     90         // can't use peek because struct copy might not be atomic
     91         interface_lock_shared(thiz);
     92         SLHSL color = thiz->mColors[index];
     93         interface_unlock_shared(thiz);
     94         *pColor = color;
     95         result = SL_RESULT_SUCCESS;
     96     }
     97 
     98     SL_LEAVE_INTERFACE
     99 }
    100 
    101 
    102 static const struct SLLEDArrayItf_ ILEDArray_Itf = {
    103     ILEDArray_ActivateLEDArray,
    104     ILEDArray_IsLEDArrayActivated,
    105     ILEDArray_SetColor,
    106     ILEDArray_GetColor
    107 };
    108 
    109 void ILEDArray_init(void *self)
    110 {
    111     ILEDArray *thiz = (ILEDArray *) self;
    112     thiz->mItf = &ILEDArray_Itf;
    113     thiz->mLightMask = 0;
    114     SLHSL *color = thiz->mColors;
    115     SLuint8 index;
    116     for (index = 0; index < MAX_LED_COUNT; ++index, ++color) {
    117         color->hue = 0; // red, but per specification 1.0.1 pg. 259: "Default color is undefined."
    118         color->saturation = 1000;
    119         color->lightness = 1000;
    120     }
    121     // const
    122     thiz->mCount = MAX_LED_COUNT;
    123 }
    124