android_media_Utils.cpp revision 5a15d0d31b877ef512b3379eac033c6bb041c86a 
1/*
2 * Copyright 2011, 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// #define LOG_NDEBUG 0
18#define LOG_TAG "AndroidMediaUtils"
19
20#include <utils/Log.h>
21#include "android_media_Utils.h"
22
23#include <media/stagefright/foundation/ADebug.h>
24#include <media/stagefright/foundation/ABuffer.h>
25#include <media/stagefright/foundation/AMessage.h>
26
27#include <nativehelper/ScopedLocalRef.h>
28
29namespace android {
30
31bool ConvertKeyValueArraysToKeyedVector(
32        JNIEnv *env, jobjectArray keys, jobjectArray values,
33        KeyedVector<String8, String8>* keyedVector) {
34
35    int nKeyValuePairs = 0;
36    bool failed = false;
37    if (keys != NULL && values != NULL) {
38        nKeyValuePairs = env->GetArrayLength(keys);
39        failed = (nKeyValuePairs != env->GetArrayLength(values));
40    }
41
42    if (!failed) {
43        failed = ((keys != NULL && values == NULL) ||
44                  (keys == NULL && values != NULL));
45    }
46
47    if (failed) {
48        ALOGE("keys and values arrays have different length");
49        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
50        return false;
51    }
52
53    for (int i = 0; i < nKeyValuePairs; ++i) {
54        // No need to check on the ArrayIndexOutOfBoundsException, since
55        // it won't happen here.
56        jstring key = (jstring) env->GetObjectArrayElement(keys, i);
57        jstring value = (jstring) env->GetObjectArrayElement(values, i);
58
59        const char* keyStr = env->GetStringUTFChars(key, NULL);
60        if (!keyStr) {  // OutOfMemoryError
61            return false;
62        }
63
64        const char* valueStr = env->GetStringUTFChars(value, NULL);
65        if (!valueStr) {  // OutOfMemoryError
66            env->ReleaseStringUTFChars(key, keyStr);
67            return false;
68        }
69
70        keyedVector->add(String8(keyStr), String8(valueStr));
71
72        env->ReleaseStringUTFChars(key, keyStr);
73        env->ReleaseStringUTFChars(value, valueStr);
74        env->DeleteLocalRef(key);
75        env->DeleteLocalRef(value);
76    }
77    return true;
78}
79
80static jobject makeIntegerObject(JNIEnv *env, int32_t value) {
81    ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Integer"));
82    CHECK(clazz.get() != NULL);
83
84    jmethodID integerConstructID =
85        env->GetMethodID(clazz.get(), "<init>", "(I)V");
86    CHECK(integerConstructID != NULL);
87
88    return env->NewObject(clazz.get(), integerConstructID, value);
89}
90
91static jobject makeLongObject(JNIEnv *env, int64_t value) {
92    ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Long"));
93    CHECK(clazz.get() != NULL);
94
95    jmethodID longConstructID = env->GetMethodID(clazz.get(), "<init>", "(J)V");
96    CHECK(longConstructID != NULL);
97
98    return env->NewObject(clazz.get(), longConstructID, value);
99}
100
101static jobject makeFloatObject(JNIEnv *env, float value) {
102    ScopedLocalRef<jclass> clazz(env, env->FindClass("java/lang/Float"));
103    CHECK(clazz.get() != NULL);
104
105    jmethodID floatConstructID =
106        env->GetMethodID(clazz.get(), "<init>", "(F)V");
107    CHECK(floatConstructID != NULL);
108
109    return env->NewObject(clazz.get(), floatConstructID, value);
110}
111
112static jobject makeByteBufferObject(
113        JNIEnv *env, const void *data, size_t size) {
114    jbyteArray byteArrayObj = env->NewByteArray(size);
115    env->SetByteArrayRegion(byteArrayObj, 0, size, (const jbyte *)data);
116
117    ScopedLocalRef<jclass> clazz(env, env->FindClass("java/nio/ByteBuffer"));
118    CHECK(clazz.get() != NULL);
119
120    jmethodID byteBufWrapID =
121        env->GetStaticMethodID(
122                clazz.get(), "wrap", "([B)Ljava/nio/ByteBuffer;");
123    CHECK(byteBufWrapID != NULL);
124
125    jobject byteBufObj = env->CallStaticObjectMethod(
126            clazz.get(), byteBufWrapID, byteArrayObj);
127
128    env->DeleteLocalRef(byteArrayObj); byteArrayObj = NULL;
129
130    return byteBufObj;
131}
132
133static void SetMapInt32(
134        JNIEnv *env, jobject hashMapObj, jmethodID hashMapPutID,
135        const char *key, int32_t value) {
136    jstring keyObj = env->NewStringUTF(key);
137    jobject valueObj = makeIntegerObject(env, value);
138
139    env->CallObjectMethod(hashMapObj, hashMapPutID, keyObj, valueObj);
140
141    env->DeleteLocalRef(valueObj); valueObj = NULL;
142    env->DeleteLocalRef(keyObj); keyObj = NULL;
143}
144
145status_t ConvertMessageToMap(
146        JNIEnv *env, const sp<AMessage> &msg, jobject *map) {
147    ScopedLocalRef<jclass> hashMapClazz(
148            env, env->FindClass("java/util/HashMap"));
149
150    if (hashMapClazz.get() == NULL) {
151        return -EINVAL;
152    }
153
154    jmethodID hashMapConstructID =
155        env->GetMethodID(hashMapClazz.get(), "<init>", "()V");
156
157    if (hashMapConstructID == NULL) {
158        return -EINVAL;
159    }
160
161    jmethodID hashMapPutID =
162        env->GetMethodID(
163                hashMapClazz.get(),
164                "put",
165                "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
166
167    if (hashMapPutID == NULL) {
168        return -EINVAL;
169    }
170
171    jobject hashMap = env->NewObject(hashMapClazz.get(), hashMapConstructID);
172
173    for (size_t i = 0; i < msg->countEntries(); ++i) {
174        AMessage::Type valueType;
175        const char *key = msg->getEntryNameAt(i, &valueType);
176
177        jobject valueObj = NULL;
178
179        switch (valueType) {
180            case AMessage::kTypeInt32:
181            {
182                int32_t val;
183                CHECK(msg->findInt32(key, &val));
184
185                valueObj = makeIntegerObject(env, val);
186                break;
187            }
188
189            case AMessage::kTypeInt64:
190            {
191                int64_t val;
192                CHECK(msg->findInt64(key, &val));
193
194                valueObj = makeLongObject(env, val);
195                break;
196            }
197
198            case AMessage::kTypeFloat:
199            {
200                float val;
201                CHECK(msg->findFloat(key, &val));
202
203                valueObj = makeFloatObject(env, val);
204                break;
205            }
206
207            case AMessage::kTypeString:
208            {
209                AString val;
210                CHECK(msg->findString(key, &val));
211
212                valueObj = env->NewStringUTF(val.c_str());
213                break;
214            }
215
216            case AMessage::kTypeBuffer:
217            {
218                sp<ABuffer> buffer;
219                CHECK(msg->findBuffer(key, &buffer));
220
221                valueObj = makeByteBufferObject(
222                        env, buffer->data(), buffer->size());
223                break;
224            }
225
226            case AMessage::kTypeRect:
227            {
228                int32_t left, top, right, bottom;
229                CHECK(msg->findRect(key, &left, &top, &right, &bottom));
230
231                SetMapInt32(
232                        env,
233                        hashMap,
234                        hashMapPutID,
235                        StringPrintf("%s-left", key).c_str(),
236                        left);
237
238                SetMapInt32(
239                        env,
240                        hashMap,
241                        hashMapPutID,
242                        StringPrintf("%s-top", key).c_str(),
243                        top);
244
245                SetMapInt32(
246                        env,
247                        hashMap,
248                        hashMapPutID,
249                        StringPrintf("%s-right", key).c_str(),
250                        right);
251
252                SetMapInt32(
253                        env,
254                        hashMap,
255                        hashMapPutID,
256                        StringPrintf("%s-bottom", key).c_str(),
257                        bottom);
258                break;
259            }
260
261            default:
262                break;
263        }
264
265        if (valueObj != NULL) {
266            jstring keyObj = env->NewStringUTF(key);
267
268            env->CallObjectMethod(hashMap, hashMapPutID, keyObj, valueObj);
269
270            env->DeleteLocalRef(keyObj); keyObj = NULL;
271            env->DeleteLocalRef(valueObj); valueObj = NULL;
272        }
273    }
274
275    *map = hashMap;
276
277    return OK;
278}
279
280status_t ConvertKeyValueArraysToMessage(
281        JNIEnv *env, jobjectArray keys, jobjectArray values,
282        sp<AMessage> *out) {
283    ScopedLocalRef<jclass> stringClass(env, env->FindClass("java/lang/String"));
284    CHECK(stringClass.get() != NULL);
285    ScopedLocalRef<jclass> integerClass(env, env->FindClass("java/lang/Integer"));
286    CHECK(integerClass.get() != NULL);
287    ScopedLocalRef<jclass> longClass(env, env->FindClass("java/lang/Long"));
288    CHECK(longClass.get() != NULL);
289    ScopedLocalRef<jclass> floatClass(env, env->FindClass("java/lang/Float"));
290    CHECK(floatClass.get() != NULL);
291    ScopedLocalRef<jclass> byteBufClass(env, env->FindClass("java/nio/ByteBuffer"));
292    CHECK(byteBufClass.get() != NULL);
293
294    sp<AMessage> msg = new AMessage;
295
296    jsize numEntries = 0;
297
298    if (keys != NULL) {
299        if (values == NULL) {
300            return -EINVAL;
301        }
302
303        numEntries = env->GetArrayLength(keys);
304
305        if (numEntries != env->GetArrayLength(values)) {
306            return -EINVAL;
307        }
308    } else if (values != NULL) {
309        return -EINVAL;
310    }
311
312    for (jsize i = 0; i < numEntries; ++i) {
313        jobject keyObj = env->GetObjectArrayElement(keys, i);
314
315        if (!env->IsInstanceOf(keyObj, stringClass.get())) {
316            return -EINVAL;
317        }
318
319        const char *tmp = env->GetStringUTFChars((jstring)keyObj, NULL);
320
321        if (tmp == NULL) {
322            return -ENOMEM;
323        }
324
325        AString key = tmp;
326
327        env->ReleaseStringUTFChars((jstring)keyObj, tmp);
328        tmp = NULL;
329
330        jobject valueObj = env->GetObjectArrayElement(values, i);
331
332        if (env->IsInstanceOf(valueObj, stringClass.get())) {
333            const char *value = env->GetStringUTFChars((jstring)valueObj, NULL);
334
335            if (value == NULL) {
336                return -ENOMEM;
337            }
338
339            msg->setString(key.c_str(), value);
340
341            env->ReleaseStringUTFChars((jstring)valueObj, value);
342            value = NULL;
343        } else if (env->IsInstanceOf(valueObj, integerClass.get())) {
344            jmethodID intValueID =
345                env->GetMethodID(integerClass.get(), "intValue", "()I");
346            CHECK(intValueID != NULL);
347
348            jint value = env->CallIntMethod(valueObj, intValueID);
349
350            msg->setInt32(key.c_str(), value);
351        } else if (env->IsInstanceOf(valueObj, longClass.get())) {
352            jmethodID longValueID =
353                env->GetMethodID(longClass.get(), "longValue", "()J");
354            CHECK(longValueID != NULL);
355
356            jlong value = env->CallLongMethod(valueObj, longValueID);
357
358            msg->setInt64(key.c_str(), value);
359        } else if (env->IsInstanceOf(valueObj, floatClass.get())) {
360            jmethodID floatValueID =
361                env->GetMethodID(floatClass.get(), "floatValue", "()F");
362            CHECK(floatValueID != NULL);
363
364            jfloat value = env->CallFloatMethod(valueObj, floatValueID);
365
366            msg->setFloat(key.c_str(), value);
367        } else if (env->IsInstanceOf(valueObj, byteBufClass.get())) {
368            jmethodID positionID =
369                env->GetMethodID(byteBufClass.get(), "position", "()I");
370            CHECK(positionID != NULL);
371
372            jmethodID limitID =
373                env->GetMethodID(byteBufClass.get(), "limit", "()I");
374            CHECK(limitID != NULL);
375
376            jint position = env->CallIntMethod(valueObj, positionID);
377            jint limit = env->CallIntMethod(valueObj, limitID);
378
379            sp<ABuffer> buffer = new ABuffer(limit - position);
380
381            void *data = env->GetDirectBufferAddress(valueObj);
382
383            if (data != NULL) {
384                memcpy(buffer->data(),
385                       (const uint8_t *)data + position,
386                       buffer->size());
387            } else {
388                jmethodID arrayID =
389                    env->GetMethodID(byteBufClass.get(), "array", "()[B");
390                CHECK(arrayID != NULL);
391
392                jbyteArray byteArray =
393                    (jbyteArray)env->CallObjectMethod(valueObj, arrayID);
394                CHECK(byteArray != NULL);
395
396                env->GetByteArrayRegion(
397                        byteArray,
398                        position,
399                        buffer->size(),
400                        (jbyte *)buffer->data());
401
402                env->DeleteLocalRef(byteArray); byteArray = NULL;
403            }
404
405            msg->setBuffer(key.c_str(), buffer);
406        }
407    }
408
409    *out = msg;
410
411    return OK;
412}
413
414}  // namespace android
415
416