IPlaybackRate.c revision 6d78c9bfb68f8a0db1855bc28c087c39a7eb6f2c 
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/* PlaybackRate implementation */
18
19#include "sles_allinclusive.h"
20
21
22static SLresult IPlaybackRate_SetRate(SLPlaybackRateItf self, SLpermille rate)
23{
24    SL_ENTER_INTERFACE
25
26    IPlaybackRate *thiz = (IPlaybackRate *) self;
27    // const, so no lock needed
28    if (!(thiz->mMinRate <= rate && rate <= thiz->mMaxRate)) {
29        result = SL_RESULT_PARAMETER_INVALID;
30    } else {
31        interface_lock_exclusive(thiz);
32#ifdef ANDROID
33        CAudioPlayer *ap = (SL_OBJECTID_AUDIOPLAYER == InterfaceToObjectID(thiz)) ?
34                (CAudioPlayer *) thiz->mThis : NULL;
35        if (NULL != ap) {
36            result = android_audioPlayer_setPlaybackRateAndConstraints(ap, rate, thiz->mProperties);
37        } else {
38            result = SL_RESULT_FEATURE_UNSUPPORTED;
39        }
40#else
41        result = SL_RESULT_SUCCESS;
42#endif
43        if (SL_RESULT_SUCCESS == result) {
44            thiz->mRate = rate;
45        }
46        interface_unlock_exclusive(thiz);
47    }
48
49    SL_LEAVE_INTERFACE
50}
51
52
53static SLresult IPlaybackRate_GetRate(SLPlaybackRateItf self, SLpermille *pRate)
54{
55    SL_ENTER_INTERFACE
56
57    if (NULL == pRate) {
58        result = SL_RESULT_PARAMETER_INVALID;
59    } else {
60        IPlaybackRate *thiz = (IPlaybackRate *) self;
61        interface_lock_shared(thiz);
62        SLpermille rate = thiz->mRate;
63        interface_unlock_shared(thiz);
64        *pRate = rate;
65        result = SL_RESULT_SUCCESS;
66    }
67
68    SL_LEAVE_INTERFACE
69}
70
71
72static SLresult IPlaybackRate_SetPropertyConstraints(SLPlaybackRateItf self, SLuint32 constraints)
73{
74    SL_ENTER_INTERFACE
75
76    IPlaybackRate *thiz = (IPlaybackRate *) self;
77    if (constraints & ~(SL_RATEPROP_SILENTAUDIO | SL_RATEPROP_STAGGEREDAUDIO |
78            SL_RATEPROP_NOPITCHCORAUDIO | SL_RATEPROP_PITCHCORAUDIO)) {
79        result = SL_RESULT_PARAMETER_INVALID;
80    // const, so no lock needed
81    } else if (!(thiz->mCapabilities & constraints)) {
82        result = SL_RESULT_FEATURE_UNSUPPORTED;
83    } else {
84        interface_lock_exclusive(thiz);
85#ifdef ANDROID
86        // verify property support before storing
87        CAudioPlayer *ap = (SL_OBJECTID_AUDIOPLAYER == InterfaceToObjectID(thiz)) ?
88                (CAudioPlayer *) thiz->mThis : NULL;
89        if (NULL != ap) {
90            result = android_audioPlayer_setPlaybackRateAndConstraints(ap, thiz->mRate,
91                    constraints);
92        } else {
93            result = SL_RESULT_FEATURE_UNSUPPORTED;
94        }
95#else
96        result = SL_RESULT_SUCCESS;
97#endif
98        if (result == SL_RESULT_SUCCESS) {
99            thiz->mProperties = constraints;
100        }
101        interface_unlock_exclusive(thiz);
102    }
103
104    SL_LEAVE_INTERFACE
105}
106
107
108static SLresult IPlaybackRate_GetProperties(SLPlaybackRateItf self, SLuint32 *pProperties)
109{
110    SL_ENTER_INTERFACE
111
112    if (NULL == pProperties) {
113        result = SL_RESULT_PARAMETER_INVALID;
114    } else {
115        IPlaybackRate *thiz = (IPlaybackRate *) self;
116        interface_lock_shared(thiz);
117        SLuint32 properties = thiz->mProperties;
118        interface_unlock_shared(thiz);
119        *pProperties = properties;
120        result = SL_RESULT_SUCCESS;
121    }
122
123    SL_LEAVE_INTERFACE
124}
125
126
127static SLresult IPlaybackRate_GetCapabilitiesOfRate(SLPlaybackRateItf self,
128    SLpermille rate, SLuint32 *pCapabilities)
129{
130    SL_ENTER_INTERFACE
131
132    if (NULL == pCapabilities) {
133        result = SL_RESULT_PARAMETER_INVALID;
134    } else {
135        IPlaybackRate *thiz = (IPlaybackRate *) self;
136        SLuint32 capabilities;
137        // const, so no lock needed
138        if (!(thiz->mMinRate <= rate && rate <= thiz->mMaxRate)) {
139            capabilities = 0;
140            result = SL_RESULT_PARAMETER_INVALID;
141        } else {
142            capabilities = thiz->mCapabilities;
143            result = SL_RESULT_SUCCESS;
144        }
145        *pCapabilities = capabilities;
146    }
147
148    SL_LEAVE_INTERFACE
149}
150
151
152static SLresult IPlaybackRate_GetRateRange(SLPlaybackRateItf self, SLuint8 index,
153    SLpermille *pMinRate, SLpermille *pMaxRate, SLpermille *pStepSize, SLuint32 *pCapabilities)
154{
155    SL_ENTER_INTERFACE
156
157    // only one range
158    if (NULL == pMinRate || NULL == pMaxRate || NULL == pStepSize || NULL == pCapabilities ||
159        (0 < index)) {
160        result = SL_RESULT_PARAMETER_INVALID;
161    } else {
162        IPlaybackRate *thiz = (IPlaybackRate *) self;
163        // const, so no lock needed
164        SLpermille minRate = thiz->mMinRate;
165        SLpermille maxRate = thiz->mMaxRate;
166        SLpermille stepSize = thiz->mStepSize;
167        SLuint32 capabilities = thiz->mCapabilities;
168        *pMinRate = minRate;
169        *pMaxRate = maxRate;
170        *pStepSize = stepSize;
171        *pCapabilities = capabilities;
172        result = SL_RESULT_SUCCESS;
173    }
174
175    SL_LEAVE_INTERFACE
176}
177
178
179static const struct SLPlaybackRateItf_ IPlaybackRate_Itf = {
180    IPlaybackRate_SetRate,
181    IPlaybackRate_GetRate,
182    IPlaybackRate_SetPropertyConstraints,
183    IPlaybackRate_GetProperties,
184    IPlaybackRate_GetCapabilitiesOfRate,
185    IPlaybackRate_GetRateRange
186};
187
188void IPlaybackRate_init(void *self)
189{
190    IPlaybackRate *thiz = (IPlaybackRate *) self;
191    thiz->mItf = &IPlaybackRate_Itf;
192    thiz->mProperties = SL_RATEPROP_NOPITCHCORAUDIO;
193    thiz->mRate = 1000;
194    // const after initialization; these are default values which may be overwritten
195    // during object creation but will not be modified after that
196    // (e.g. for an Android AudioPlayer, see sles_to_android_audioPlayerCreate)
197    thiz->mMinRate = 1000;
198    thiz->mMaxRate = 1000;
199    thiz->mStepSize = 0;
200    thiz->mCapabilities = SL_RATEPROP_NOPITCHCORAUDIO;
201}
202