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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 /* MIDITime implementation */
     18 
     19 #include "sles_allinclusive.h"
     20 
     21 
     22 static SLresult IMIDITime_GetDuration(SLMIDITimeItf self, SLuint32 *pDuration)
     23 {
     24     SL_ENTER_INTERFACE
     25 
     26     if (NULL == pDuration) {
     27         result = SL_RESULT_PARAMETER_INVALID;
     28     } else {
     29         IMIDITime *thiz = (IMIDITime *) self;
     30         SLuint32 duration = thiz->mDuration;
     31         *pDuration = duration;
     32         result = SL_RESULT_SUCCESS;
     33     }
     34 
     35     SL_LEAVE_INTERFACE
     36 }
     37 
     38 
     39 static SLresult IMIDITime_SetPosition(SLMIDITimeItf self, SLuint32 position)
     40 {
     41     SL_ENTER_INTERFACE
     42 
     43     IMIDITime *thiz = (IMIDITime *) self;
     44     // const, no lock needed
     45     if (!(position < thiz->mDuration)) {
     46         result = SL_RESULT_PARAMETER_INVALID;
     47     } else {
     48         interface_lock_poke(thiz);
     49         thiz->mPosition = position;
     50         interface_unlock_poke(thiz);
     51         result = SL_RESULT_SUCCESS;
     52     }
     53 
     54     SL_LEAVE_INTERFACE
     55 }
     56 
     57 
     58 static SLresult IMIDITime_GetPosition(SLMIDITimeItf self, SLuint32 *pPosition)
     59 {
     60     SL_ENTER_INTERFACE
     61 
     62     if (NULL == pPosition) {
     63         result = SL_RESULT_PARAMETER_INVALID;
     64     } else {
     65         IMIDITime *thiz = (IMIDITime *) self;
     66         interface_lock_peek(thiz);
     67         SLuint32 position = thiz->mPosition;
     68         interface_unlock_peek(thiz);
     69         *pPosition = position;
     70         result = SL_RESULT_SUCCESS;
     71     }
     72 
     73     SL_LEAVE_INTERFACE
     74 }
     75 
     76 
     77 static SLresult IMIDITime_SetLoopPoints(SLMIDITimeItf self, SLuint32 startTick, SLuint32 numTicks)
     78 {
     79     SL_ENTER_INTERFACE
     80 
     81     IMIDITime *thiz = (IMIDITime *) self;
     82     // const, no lock needed
     83     SLuint32 duration = thiz->mDuration;
     84     if (!((startTick < duration) && (numTicks <= duration - startTick))) {
     85         result = SL_RESULT_PARAMETER_INVALID;
     86     } else {
     87         interface_lock_exclusive(thiz);
     88         thiz->mStartTick = startTick;
     89         thiz->mNumTicks = numTicks;
     90         interface_unlock_exclusive(thiz);
     91         result = SL_RESULT_SUCCESS;
     92     }
     93 
     94     SL_LEAVE_INTERFACE
     95 }
     96 
     97 
     98 static SLresult IMIDITime_GetLoopPoints(SLMIDITimeItf self, SLuint32 *pStartTick,
     99     SLuint32 *pNumTicks)
    100 {
    101     SL_ENTER_INTERFACE
    102 
    103     if (NULL == pStartTick || NULL == pNumTicks) {
    104         result = SL_RESULT_PARAMETER_INVALID;
    105     } else {
    106         IMIDITime *thiz = (IMIDITime *) self;
    107         interface_lock_shared(thiz);
    108         SLuint32 startTick = thiz->mStartTick;
    109         SLuint32 numTicks = thiz->mNumTicks;
    110         interface_unlock_shared(thiz);
    111         *pStartTick = startTick;
    112         *pNumTicks = numTicks;
    113         result = SL_RESULT_SUCCESS;
    114     }
    115 
    116     SL_LEAVE_INTERFACE
    117 }
    118 
    119 
    120 static const struct SLMIDITimeItf_ IMIDITime_Itf = {
    121     IMIDITime_GetDuration,
    122     IMIDITime_SetPosition,
    123     IMIDITime_GetPosition,
    124     IMIDITime_SetLoopPoints,
    125     IMIDITime_GetLoopPoints
    126 };
    127 
    128 void IMIDITime_init(void *self)
    129 {
    130     IMIDITime *thiz = (IMIDITime *) self;
    131     thiz->mItf = &IMIDITime_Itf;
    132     thiz->mDuration = 0;
    133     thiz->mPosition = 0;
    134     thiz->mStartTick = 0;
    135     thiz->mNumTicks = 0;
    136 }
    137