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1/*
2 * Copyright (C) 2013 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#include <android/bitmap.h>
18#include "JNIHelpers.h"
19#include "utils/log.h"
20#include "FrameSequence.h"
21
22#include "FrameSequenceJNI.h"
23
24#define JNI_PACKAGE "android/support/rastermill"
25
26static struct {
27    jclass clazz;
28    jmethodID ctor;
29} gFrameSequenceClassInfo;
30
31////////////////////////////////////////////////////////////////////////////////
32// Frame sequence
33////////////////////////////////////////////////////////////////////////////////
34
35static jobject createJavaFrameSequence(JNIEnv* env, FrameSequence* frameSequence) {
36    if (!frameSequence) {
37        return NULL;
38    }
39    return env->NewObject(gFrameSequenceClassInfo.clazz, gFrameSequenceClassInfo.ctor,
40            reinterpret_cast<jlong>(frameSequence),
41            frameSequence->getWidth(),
42            frameSequence->getHeight(),
43            frameSequence->isOpaque(),
44            frameSequence->getFrameCount(),
45            frameSequence->getDefaultLoopCount());
46}
47
48static jobject nativeDecodeByteArray(JNIEnv* env, jobject clazz,
49        jbyteArray byteArray, jint offset, jint length) {
50    jbyte* bytes = reinterpret_cast<jbyte*>(env->GetPrimitiveArrayCritical(byteArray, NULL));
51    if (bytes == NULL) {
52        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
53                "couldn't read array bytes");
54        return NULL;
55    }
56    MemoryStream stream(bytes + offset, length, NULL);
57    FrameSequence* frameSequence = FrameSequence::create(&stream);
58    env->ReleasePrimitiveArrayCritical(byteArray, bytes, 0);
59    return createJavaFrameSequence(env, frameSequence);
60}
61
62static jobject nativeDecodeByteBuffer(JNIEnv* env, jobject clazz,
63        jobject buf, jint offset, jint limit) {
64    jobject globalBuf = env->NewGlobalRef(buf);
65    JavaVM* vm;
66    env->GetJavaVM(&vm);
67    MemoryStream stream(
68        (reinterpret_cast<uint8_t*>(
69            env->GetDirectBufferAddress(globalBuf))) + offset,
70        limit,
71        globalBuf);
72    FrameSequence* frameSequence = FrameSequence::create(&stream);
73    jobject finalSequence = createJavaFrameSequence(env, frameSequence);
74    return finalSequence;
75}
76
77static jobject nativeDecodeStream(JNIEnv* env, jobject clazz,
78        jobject istream, jbyteArray byteArray) {
79    JavaInputStream stream(env, istream, byteArray);
80    FrameSequence* frameSequence = FrameSequence::create(&stream);
81    return createJavaFrameSequence(env, frameSequence);
82}
83
84static void nativeDestroyFrameSequence(JNIEnv* env, jobject clazz,
85        jlong frameSequenceLong) {
86    FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
87    jobject buf = frameSequence->getRawByteBuffer();
88    if (buf != NULL) {
89        env->DeleteGlobalRef(buf);
90    }
91    delete frameSequence;
92}
93
94static jlong nativeCreateState(JNIEnv* env, jobject clazz, jlong frameSequenceLong) {
95    FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
96    FrameSequenceState* state = frameSequence->createState();
97    return reinterpret_cast<jlong>(state);
98}
99
100////////////////////////////////////////////////////////////////////////////////
101// Frame sequence state
102////////////////////////////////////////////////////////////////////////////////
103
104static void nativeDestroyState(
105        JNIEnv* env, jobject clazz, jlong frameSequenceStateLong) {
106    FrameSequenceState* frameSequenceState =
107            reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
108    delete frameSequenceState;
109}
110
111static jlong JNICALL nativeGetFrame(
112        JNIEnv* env, jobject clazz, jlong frameSequenceStateLong, jint frameNr,
113        jobject bitmap, jint previousFrameNr) {
114    FrameSequenceState* frameSequenceState =
115            reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
116    int ret;
117    AndroidBitmapInfo info;
118    void* pixels;
119    if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
120
121        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
122                "Couldn't get info from Bitmap ");
123        return 0;
124    }
125
126    if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
127        jniThrowException(env, ILLEGAL_STATE_EXEPTION,
128                "Bitmap pixels couldn't be locked");
129        return 0;
130    }
131
132    int pixelStride = info.stride >> 2;
133    jlong delayMs = frameSequenceState->drawFrame(frameNr,
134            (Color8888*) pixels, pixelStride, previousFrameNr);
135
136    AndroidBitmap_unlockPixels(env, bitmap);
137    return delayMs;
138}
139
140static JNINativeMethod gMethods[] = {
141    {   "nativeDecodeByteArray",
142        "([BII)L" JNI_PACKAGE "/FrameSequence;",
143        (void*) nativeDecodeByteArray
144    },
145    {   "nativeDecodeByteBuffer",
146        "(Ljava/nio/ByteBuffer;II)L" JNI_PACKAGE "/FrameSequence;",
147        (void*) nativeDecodeByteBuffer
148    },
149    {   "nativeDecodeStream",
150        "(Ljava/io/InputStream;[B)L" JNI_PACKAGE "/FrameSequence;",
151        (void*) nativeDecodeStream
152    },
153    {   "nativeDestroyFrameSequence",
154        "(J)V",
155        (void*) nativeDestroyFrameSequence
156    },
157    {   "nativeCreateState",
158        "(J)J",
159        (void*) nativeCreateState
160    },
161    {   "nativeGetFrame",
162        "(JILandroid/graphics/Bitmap;I)J",
163        (void*) nativeGetFrame
164    },
165    {   "nativeDestroyState",
166        "(J)V",
167        (void*) nativeDestroyState
168    },
169};
170
171jint FrameSequence_OnLoad(JNIEnv* env) {
172    // Get jclass with env->FindClass.
173    // Register methods with env->RegisterNatives.
174    gFrameSequenceClassInfo.clazz = env->FindClass(JNI_PACKAGE "/FrameSequence");
175    if (!gFrameSequenceClassInfo.clazz) {
176        ALOGW("Failed to find " JNI_PACKAGE "/FrameSequence");
177        return -1;
178    }
179    gFrameSequenceClassInfo.clazz = (jclass)env->NewGlobalRef(gFrameSequenceClassInfo.clazz);
180
181    gFrameSequenceClassInfo.ctor = env->GetMethodID(gFrameSequenceClassInfo.clazz, "<init>", "(JIIZII)V");
182    if (!gFrameSequenceClassInfo.ctor) {
183        ALOGW("Failed to find constructor for FrameSequence - was it stripped?");
184        return -1;
185    }
186
187    return env->RegisterNatives(gFrameSequenceClassInfo.clazz, gMethods, METHOD_COUNT(gMethods));
188}
189