• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2015, 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 #ifndef _ANDROID_MEDIA_PLAYBACK_PARAMS_H_
18 #define _ANDROID_MEDIA_PLAYBACK_PARAMS_H_
19 
20 #include <media/AudioResamplerPublic.h>
21 
22 namespace android {
23 
24 // This entire class is inline as it is used from both core and media
25 struct PlaybackParams {
26     AudioPlaybackRate audioRate;
27     bool speedSet;
28     bool pitchSet;
29     bool audioFallbackModeSet;
30     bool audioStretchModeSet;
31 
32     struct fields_t {
33         jclass      clazz;
34         jmethodID   constructID;
35 
36         jfieldID    speed;
37         jfieldID    pitch;
38         jfieldID    audio_fallback_mode;
39         jfieldID    audio_stretch_mode;
40         jfieldID    set;
41         jint        set_speed;
42         jint        set_pitch;
43         jint        set_audio_fallback_mode;
44         jint        set_audio_stretch_mode;
45 
initPlaybackParams::fields_t46         void init(JNIEnv *env) {
47             jclass lclazz = env->FindClass("android/media/PlaybackParams");
48             if (lclazz == NULL) {
49                 return;
50             }
51 
52             clazz = (jclass)env->NewGlobalRef(lclazz);
53             if (clazz == NULL) {
54                 return;
55             }
56 
57             constructID = env->GetMethodID(clazz, "<init>", "()V");
58 
59             speed = env->GetFieldID(clazz, "mSpeed", "F");
60             pitch = env->GetFieldID(clazz, "mPitch", "F");
61             audio_fallback_mode = env->GetFieldID(clazz, "mAudioFallbackMode", "I");
62             audio_stretch_mode = env->GetFieldID(clazz, "mAudioStretchMode", "I");
63             set = env->GetFieldID(clazz, "mSet", "I");
64 
65             set_speed =
66                 env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "SET_SPEED", "I"));
67             set_pitch =
68                 env->GetStaticIntField(clazz, env->GetStaticFieldID(clazz, "SET_PITCH", "I"));
69             set_audio_fallback_mode = env->GetStaticIntField(
70                     clazz, env->GetStaticFieldID(clazz, "SET_AUDIO_FALLBACK_MODE", "I"));
71             set_audio_stretch_mode = env->GetStaticIntField(
72                     clazz, env->GetStaticFieldID(clazz, "SET_AUDIO_STRETCH_MODE", "I"));
73 
74             env->DeleteLocalRef(lclazz);
75         }
76 
exitPlaybackParams::fields_t77         void exit(JNIEnv *env) {
78             env->DeleteGlobalRef(clazz);
79             clazz = NULL;
80         }
81     };
82 
fillFromJobjectPlaybackParams83     void fillFromJobject(JNIEnv *env, const fields_t& fields, jobject params) {
84         audioRate.mSpeed = env->GetFloatField(params, fields.speed);
85         audioRate.mPitch = env->GetFloatField(params, fields.pitch);
86         audioRate.mFallbackMode =
87             (AudioTimestretchFallbackMode)env->GetIntField(params, fields.audio_fallback_mode);
88         audioRate.mStretchMode =
89             (AudioTimestretchStretchMode)env->GetIntField(params, fields.audio_stretch_mode);
90         int set = env->GetIntField(params, fields.set);
91 
92         speedSet = set & fields.set_speed;
93         pitchSet = set & fields.set_pitch;
94         audioFallbackModeSet = set & fields.set_audio_fallback_mode;
95         audioStretchModeSet = set & fields.set_audio_stretch_mode;
96     }
97 
asJobjectPlaybackParams98     jobject asJobject(JNIEnv *env, const fields_t& fields) {
99         jobject params = env->NewObject(fields.clazz, fields.constructID);
100         if (params == NULL) {
101             return NULL;
102         }
103         env->SetFloatField(params, fields.speed, (jfloat)audioRate.mSpeed);
104         env->SetFloatField(params, fields.pitch, (jfloat)audioRate.mPitch);
105         env->SetIntField(params, fields.audio_fallback_mode, (jint)audioRate.mFallbackMode);
106         env->SetIntField(params, fields.audio_stretch_mode, (jint)audioRate.mStretchMode);
107         env->SetIntField(
108                 params, fields.set,
109                 (speedSet ? fields.set_speed : 0)
110                         | (pitchSet ? fields.set_pitch : 0)
111                         | (audioFallbackModeSet ? fields.set_audio_fallback_mode : 0)
112                         | (audioStretchModeSet  ? fields.set_audio_stretch_mode : 0));
113 
114         return params;
115     }
116 };
117 
118 }  // namespace android
119 
120 #endif  // _ANDROID_MEDIA_PLAYBACK_PARAMS_H_
121