summaryrefslogtreecommitdiffstats
path: root/framesequence/jni/FrameSequenceJNI.cpp
blob: 08a73bc743999489e6d61c7e098c70b9852fd565 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <android/bitmap.h>
#include "JNIHelpers.h"
#include "utils/log.h"
#include "FrameSequence.h"

#include "FrameSequenceJNI.h"

#define JNI_PACKAGE "android/support/rastermill"

static struct {
    jclass clazz;
    jmethodID ctor;
} gFrameSequenceClassInfo;

////////////////////////////////////////////////////////////////////////////////
// Frame sequence
////////////////////////////////////////////////////////////////////////////////

static jobject createJavaFrameSequence(JNIEnv* env, FrameSequence* frameSequence) {
    if (!frameSequence) {
        return NULL;
    }
    return env->NewObject(gFrameSequenceClassInfo.clazz, gFrameSequenceClassInfo.ctor,
            reinterpret_cast<jlong>(frameSequence),
            frameSequence->getWidth(),
            frameSequence->getHeight(),
            frameSequence->isOpaque(),
            frameSequence->getFrameCount(),
            frameSequence->getDefaultLoopCount());
}

static jobject nativeDecodeByteArray(JNIEnv* env, jobject clazz,
        jbyteArray byteArray, jint offset, jint length) {
    jbyte* bytes = reinterpret_cast<jbyte*>(env->GetPrimitiveArrayCritical(byteArray, NULL));
    if (bytes == NULL) {
        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
                "couldn't read array bytes");
        return NULL;
    }
    MemoryStream stream(bytes + offset, length);
    FrameSequence* frameSequence = FrameSequence::create(&stream);
    env->ReleasePrimitiveArrayCritical(byteArray, bytes, 0);
    return createJavaFrameSequence(env, frameSequence);
}

static jobject nativeDecodeStream(JNIEnv* env, jobject clazz,
        jobject istream, jbyteArray byteArray) {
    JavaInputStream stream(env, istream, byteArray);
    FrameSequence* frameSequence = FrameSequence::create(&stream);
    return createJavaFrameSequence(env, frameSequence);
}

static void nativeDestroyFrameSequence(JNIEnv* env, jobject clazz,
        jlong frameSequenceLong) {
    FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
    delete frameSequence;
}

static jlong nativeCreateState(JNIEnv* env, jobject clazz, jlong frameSequenceLong) {
    FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
    FrameSequenceState* state = frameSequence->createState();
    return reinterpret_cast<jlong>(state);
}

////////////////////////////////////////////////////////////////////////////////
// Frame sequence state
////////////////////////////////////////////////////////////////////////////////

static void nativeDestroyState(
        JNIEnv* env, jobject clazz, jlong frameSequenceStateLong) {
    FrameSequenceState* frameSequenceState =
            reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
    delete frameSequenceState;
}

static jlong JNICALL nativeGetFrame(
        JNIEnv* env, jobject clazz, jlong frameSequenceStateLong, jint frameNr,
        jobject bitmap, jint previousFrameNr) {
    FrameSequenceState* frameSequenceState =
            reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
    int ret;
    AndroidBitmapInfo info;
    void* pixels;
    if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {

        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
                "Couldn't get info from Bitmap ");
        return 0;
    }

    if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
                "Bitmap pixels couldn't be locked");
        return 0;
    }

    int pixelStride = info.stride >> 2;
    jlong delayMs = frameSequenceState->drawFrame(frameNr,
            (Color8888*) pixels, pixelStride, previousFrameNr);

    AndroidBitmap_unlockPixels(env, bitmap);
    return delayMs;
}

static JNINativeMethod gMethods[] = {
    {   "nativeDecodeByteArray",
        "([BII)L" JNI_PACKAGE "/FrameSequence;",
        (void*) nativeDecodeByteArray
    },
    {   "nativeDecodeStream",
        "(Ljava/io/InputStream;[B)L" JNI_PACKAGE "/FrameSequence;",
        (void*) nativeDecodeStream
    },
    {   "nativeDestroyFrameSequence",
        "(J)V",
        (void*) nativeDestroyFrameSequence
    },
    {   "nativeCreateState",
        "(J)J",
        (void*) nativeCreateState
    },
    {   "nativeGetFrame",
        "(JILandroid/graphics/Bitmap;I)J",
        (void*) nativeGetFrame
    },
    {   "nativeDestroyState",
        "(J)V",
        (void*) nativeDestroyState
    },
};

jint FrameSequence_OnLoad(JNIEnv* env) {
    // Get jclass with env->FindClass.
    // Register methods with env->RegisterNatives.
    gFrameSequenceClassInfo.clazz = env->FindClass(JNI_PACKAGE "/FrameSequence");
    if (!gFrameSequenceClassInfo.clazz) {
        ALOGW("Failed to find " JNI_PACKAGE "/FrameSequence");
        return -1;
    }
    gFrameSequenceClassInfo.clazz = (jclass)env->NewGlobalRef(gFrameSequenceClassInfo.clazz);

    gFrameSequenceClassInfo.ctor = env->GetMethodID(gFrameSequenceClassInfo.clazz, "<init>", "(JIIZII)V");
    if (!gFrameSequenceClassInfo.ctor) {
        ALOGW("Failed to find constructor for FrameSequence - was it stripped?");
        return -1;
    }

    return env->RegisterNatives(gFrameSequenceClassInfo.clazz, gMethods, METHOD_COUNT(gMethods));
}