IVisualization.c revision bcc5c7225e3b7a1dbf2e9e830987f69167acf06f 
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
22static 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
43static 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
58static const struct SLVisualizationItf_ IVisualization_Itf = {
59    IVisualization_RegisterVisualizationCallback,
60    IVisualization_GetMaxRate
61};
62
63void 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