IRatePitch.c revision d2a7f0d6883a6d3835642e7b282f05ed1c54fe63 
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/* RatePitch implementation */
18
19#include "sles_allinclusive.h"
20
21static SLresult IRatePitch_SetRate(SLRatePitchItf self, SLpermille rate)
22{
23    IRatePitch *this = (IRatePitch *) self;
24    if (!(this->mMinRate <= rate && rate <= this->mMaxRate))
25        return SL_RESULT_PARAMETER_INVALID;
26    interface_lock_poke(this);
27    this->mRate = rate;
28    interface_unlock_poke(this);
29    return SL_RESULT_SUCCESS;
30}
31
32static SLresult IRatePitch_GetRate(SLRatePitchItf self, SLpermille *pRate)
33{
34    if (NULL == pRate)
35        return SL_RESULT_PARAMETER_INVALID;
36    IRatePitch *this = (IRatePitch *) self;
37    interface_lock_peek(this);
38    SLpermille rate = this->mRate;
39    interface_unlock_peek(this);
40    *pRate = rate;
41    return SL_RESULT_SUCCESS;
42}
43
44static SLresult IRatePitch_GetRatePitchCapabilities(SLRatePitchItf self,
45    SLpermille *pMinRate, SLpermille *pMaxRate)
46{
47    // per spec, each is optional, and does not require that at least one must be non-NULL
48#if 0
49    if (NULL == pMinRate && NULL == pMaxRate)
50        return SL_RESULT_PARAMETER_INVALID;
51#endif
52    IRatePitch *this = (IRatePitch *) self;
53    // const, so no lock required
54    SLpermille minRate = this->mMinRate;
55    SLpermille maxRate = this->mMaxRate;
56    if (NULL != pMinRate)
57        *pMinRate = minRate;
58    if (NULL != pMaxRate)
59        *pMaxRate = maxRate;
60    return SL_RESULT_SUCCESS;
61}
62
63static const struct SLRatePitchItf_ IRatePitch_Itf = {
64    IRatePitch_SetRate,
65    IRatePitch_GetRate,
66    IRatePitch_GetRatePitchCapabilities
67};
68
69void IRatePitch_init(void *self)
70{
71    IRatePitch *this = (IRatePitch *) self;
72    this->mItf = &IRatePitch_Itf;
73    this->mRate = 0;
74    // const
75    this->mMinRate = 500;
76    this->mMaxRate = 2000;
77}
78