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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 /* Visualization implementation */
     18 
     19 #include "sles_allinclusive.h"
     20 
     21 
     22 static SLresult IVisualization_RegisterVisualizationCallback(SLVisualizationItf self,
     23     slVisualizationCallback callback, void *pContext, SLmilliHertz rate)
     24 {
     25     SL_ENTER_INTERFACE
     26 
     27     if (!(0 < rate && rate <= 20000)) {
     28         result = SL_RESULT_PARAMETER_INVALID;
     29     } else {
     30         IVisualization *thiz = (IVisualization *) self;
     31         interface_lock_exclusive(thiz);
     32         thiz->mCallback = callback;
     33         thiz->mContext = pContext;
     34         thiz->mRate = rate;
     35         interface_unlock_exclusive(thiz);
     36         result = SL_RESULT_SUCCESS;
     37     }
     38 
     39     SL_LEAVE_INTERFACE
     40 }
     41 
     42 
     43 static SLresult IVisualization_GetMaxRate(SLVisualizationItf self, SLmilliHertz *pRate)
     44 {
     45     SL_ENTER_INTERFACE
     46 
     47     if (NULL == pRate) {
     48         result = SL_RESULT_PARAMETER_INVALID;
     49     } else {
     50         *pRate = 20000;
     51         result = SL_RESULT_SUCCESS;
     52     }
     53 
     54     SL_LEAVE_INTERFACE
     55 }
     56 
     57 
     58 static const struct SLVisualizationItf_ IVisualization_Itf = {
     59     IVisualization_RegisterVisualizationCallback,
     60     IVisualization_GetMaxRate
     61 };
     62 
     63 void IVisualization_init(void *self)
     64 {
     65     IVisualization *thiz = (IVisualization *) self;
     66     thiz->mItf = &IVisualization_Itf;
     67     thiz->mCallback = NULL;
     68     thiz->mContext = NULL;
     69     thiz->mRate = 20000;
     70 }
     71