android_media_BufferingParams.h revision 49ca7252e4c34b67d7ded26ea3397b76f6f4aa72 
1/*
2 * Copyright 2017, 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_BUFFERING_PARAMS_H_
18#define _ANDROID_MEDIA_BUFFERING_PARAMS_H_
19
20#include <media/BufferingSettings.h>
21
22namespace android {
23
24// This entire class is inline
25struct BufferingParams {
26    BufferingSettings settings;
27
28    struct fields_t {
29        jclass      clazz;
30        jmethodID   constructID;
31
32        jfieldID    initial_mark_ms;
33        jfieldID    resume_playback_mark_ms;
34
35        void init(JNIEnv *env) {
36            jclass lclazz = env->FindClass("android/media/BufferingParams");
37            if (lclazz == NULL) {
38                return;
39            }
40
41            clazz = (jclass)env->NewGlobalRef(lclazz);
42            if (clazz == NULL) {
43                return;
44            }
45
46            constructID = env->GetMethodID(clazz, "<init>", "()V");
47
48            initial_mark_ms = env->GetFieldID(clazz, "mInitialMarkMs", "I");
49            resume_playback_mark_ms = env->GetFieldID(clazz, "mResumePlaybackMarkMs", "I");
50
51            env->DeleteLocalRef(lclazz);
52        }
53
54        void exit(JNIEnv *env) {
55            env->DeleteGlobalRef(clazz);
56            clazz = NULL;
57        }
58    };
59
60    void fillFromJobject(JNIEnv *env, const fields_t& fields, jobject params) {
61        settings.mInitialMarkMs =
62            env->GetIntField(params, fields.initial_mark_ms);
63        settings.mResumePlaybackMarkMs =
64            env->GetIntField(params, fields.resume_playback_mark_ms);
65    }
66
67    jobject asJobject(JNIEnv *env, const fields_t& fields) {
68        jobject params = env->NewObject(fields.clazz, fields.constructID);
69        if (params == NULL) {
70            return NULL;
71        }
72        env->SetIntField(params, fields.initial_mark_ms, (jint)settings.mInitialMarkMs);
73        env->SetIntField(params, fields.resume_playback_mark_ms, (jint)settings.mResumePlaybackMarkMs);
74
75        return params;
76    }
77};
78
79}  // namespace android
80
81#endif  // _ANDROID_MEDIA_BUFFERING_PARAMS_H_
82