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 /* OutputMix implementation */
18
19 #include "sles_allinclusive.h"
20
21
IOutputMix_GetDestinationOutputDeviceIDs(SLOutputMixItf self,SLint32 * pNumDevices,SLuint32 * pDeviceIDs)22 static SLresult IOutputMix_GetDestinationOutputDeviceIDs(SLOutputMixItf self,
23 SLint32 *pNumDevices, SLuint32 *pDeviceIDs)
24 {
25 SL_ENTER_INTERFACE
26
27 if (NULL == pNumDevices) {
28 result = SL_RESULT_PARAMETER_INVALID;
29 } else {
30 result = SL_RESULT_SUCCESS;
31 // The application can set pDeviceIDs == NULL in order to find out number of devices.
32 // Then the application can allocate a proper-sized device ID array and try again.
33 if (NULL != pDeviceIDs) {
34 if (1 > *pNumDevices) {
35 result = SL_RESULT_BUFFER_INSUFFICIENT;
36 } else {
37 pDeviceIDs[0] = SL_DEFAULTDEVICEID_AUDIOOUTPUT;
38 }
39 }
40 *pNumDevices = 1;
41 }
42
43 SL_LEAVE_INTERFACE
44 }
45
46
IOutputMix_RegisterDeviceChangeCallback(SLOutputMixItf self,slMixDeviceChangeCallback callback,void * pContext)47 static SLresult IOutputMix_RegisterDeviceChangeCallback(SLOutputMixItf self,
48 slMixDeviceChangeCallback callback, void *pContext)
49 {
50 SL_ENTER_INTERFACE
51
52 IOutputMix *thiz = (IOutputMix *) self;
53 interface_lock_exclusive(thiz);
54 thiz->mCallback = callback;
55 thiz->mContext = pContext;
56 interface_unlock_exclusive(thiz);
57 result = SL_RESULT_SUCCESS;
58
59 SL_LEAVE_INTERFACE
60 }
61
62
IOutputMix_ReRoute(SLOutputMixItf self,SLint32 numOutputDevices,SLuint32 * pOutputDeviceIDs)63 static SLresult IOutputMix_ReRoute(SLOutputMixItf self, SLint32 numOutputDevices,
64 SLuint32 *pOutputDeviceIDs)
65 {
66 SL_ENTER_INTERFACE
67
68 if ((1 != numOutputDevices) || (NULL == pOutputDeviceIDs)) {
69 result = SL_RESULT_PARAMETER_INVALID;
70 } else {
71 switch (pOutputDeviceIDs[0]) {
72 case SL_DEFAULTDEVICEID_AUDIOOUTPUT:
73 case DEVICE_ID_HEADSET:
74 result = SL_RESULT_SUCCESS;
75 break;
76 default:
77 result = SL_RESULT_PARAMETER_INVALID;
78 break;
79 }
80 }
81
82 SL_LEAVE_INTERFACE
83 }
84
85
86 static const struct SLOutputMixItf_ IOutputMix_Itf = {
87 IOutputMix_GetDestinationOutputDeviceIDs,
88 IOutputMix_RegisterDeviceChangeCallback,
89 IOutputMix_ReRoute
90 };
91
IOutputMix_init(void * self)92 void IOutputMix_init(void *self)
93 {
94 IOutputMix *thiz = (IOutputMix *) self;
95 thiz->mItf = &IOutputMix_Itf;
96 thiz->mCallback = NULL;
97 thiz->mContext = NULL;
98 }
99