ISeek.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/* Seek implementation */
18
19#include "sles_allinclusive.h"
20
21
22static SLresult ISeek_SetPosition(SLSeekItf self, SLmillisecond pos, SLuint32 seekMode)
23{
24    SL_ENTER_INTERFACE
25
26    switch (seekMode) {
27    case SL_SEEKMODE_FAST:
28    case SL_SEEKMODE_ACCURATE:
29        {
30        // maximum position is a special value that indicates a seek is not pending
31        if (SL_TIME_UNKNOWN == pos) {
32            pos = SL_TIME_UNKNOWN - 1;
33        }
34        ISeek *thiz = (ISeek *) self;
35        interface_lock_exclusive(thiz);
36        thiz->mPos = pos;
37        // at this point the seek is merely pending, so do not yet update other fields
38        interface_unlock_exclusive_attributes(thiz, ATTR_POSITION);
39        result = SL_RESULT_SUCCESS;
40        }
41        break;
42    default:
43        result = SL_RESULT_PARAMETER_INVALID;
44        break;
45    }
46
47    SL_LEAVE_INTERFACE
48}
49
50
51static SLresult ISeek_SetLoop(SLSeekItf self, SLboolean loopEnable,
52    SLmillisecond startPos, SLmillisecond endPos)
53{
54    SL_ENTER_INTERFACE
55
56    if (!(startPos < endPos)) {
57        result = SL_RESULT_PARAMETER_INVALID;
58    } else {
59        ISeek *thiz = (ISeek *) self;
60        interface_lock_exclusive(thiz);
61#ifdef ANDROID
62        if ((startPos != 0) && (endPos != SL_TIME_UNKNOWN)) {
63            result = SL_RESULT_FEATURE_UNSUPPORTED;
64        } else {
65            thiz->mLoopEnabled = SL_BOOLEAN_FALSE != loopEnable; // normalize
66            // start and end positions already initialized to [0, end of stream]
67            /*thiz->mStartPos = 0;
68            thiz->mEndPos = (SLmillisecond) SL_TIME_UNKNOWN;*/
69            CAudioPlayer *ap = InterfaceToCAudioPlayer(thiz);
70            if (NULL != ap) {
71                android_audioPlayer_loop(ap, loopEnable);
72            }
73            result = SL_RESULT_SUCCESS;
74        }
75#else
76        thiz->mLoopEnabled = SL_BOOLEAN_FALSE != loopEnable; // normalize
77        thiz->mStartPos = startPos;
78        thiz->mEndPos = endPos;
79        result = SL_RESULT_SUCCESS;
80#endif
81        interface_unlock_exclusive(thiz);
82    }
83
84    SL_LEAVE_INTERFACE
85}
86
87
88static SLresult ISeek_GetLoop(SLSeekItf self, SLboolean *pLoopEnabled,
89    SLmillisecond *pStartPos, SLmillisecond *pEndPos)
90{
91    SL_ENTER_INTERFACE
92
93    if (NULL == pLoopEnabled || NULL == pStartPos || NULL == pEndPos) {
94        result = SL_RESULT_PARAMETER_INVALID;
95    } else {
96        ISeek *thiz = (ISeek *) self;
97        interface_lock_shared(thiz);
98        SLboolean loopEnabled = thiz->mLoopEnabled;
99        SLmillisecond startPos = thiz->mStartPos;
100        SLmillisecond endPos = thiz->mEndPos;
101        interface_unlock_shared(thiz);
102        *pLoopEnabled = loopEnabled;
103        *pStartPos = startPos;
104        *pEndPos = endPos;
105        result = SL_RESULT_SUCCESS;
106    }
107
108    SL_LEAVE_INTERFACE
109}
110
111
112static const struct SLSeekItf_ ISeek_Itf = {
113    ISeek_SetPosition,
114    ISeek_SetLoop,
115    ISeek_GetLoop
116};
117
118void ISeek_init(void *self)
119{
120    ISeek *thiz = (ISeek *) self;
121    thiz->mItf = &ISeek_Itf;
122    thiz->mPos = (SLmillisecond) SL_TIME_UNKNOWN;
123    thiz->mStartPos = (SLmillisecond) 0;
124    thiz->mEndPos = (SLmillisecond) SL_TIME_UNKNOWN;
125    thiz->mLoopEnabled = SL_BOOLEAN_FALSE;
126}
127