1 /*
2 * Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include "JavaInputStreamCallbacks.h"
27 #include "JniUtils.h"
28 #include <Common/VSMemory.h>
29 #if TARGET_OS_LINUX
30 #include <stdlib.h>
31 #include <string.h>
32 #endif // TARGET_OS_LINUX
33
34 jfieldID CJavaInputStreamCallbacks::m_BufferFID = 0;
35 jmethodID CJavaInputStreamCallbacks::m_NeedBufferMID = 0;
36 jmethodID CJavaInputStreamCallbacks::m_ReadNextBlockMID = 0;
37 jmethodID CJavaInputStreamCallbacks::m_ReadBlockMID = 0;
38 jmethodID CJavaInputStreamCallbacks::m_IsSeekableMID = 0;
39 jmethodID CJavaInputStreamCallbacks::m_IsRandomAccessMID = 0;
40 jmethodID CJavaInputStreamCallbacks::m_SeekMID = 0;
41 jmethodID CJavaInputStreamCallbacks::m_CloseConnectionMID = 0;
42 jmethodID CJavaInputStreamCallbacks::m_PropertyMID = 0;
43 jmethodID CJavaInputStreamCallbacks::m_GetStreamSizeMID = 0;
44
45 CJavaInputStreamCallbacks::CJavaInputStreamCallbacks()
46 : m_ConnectionHolder(0)
47 {}
48
49 CJavaInputStreamCallbacks::~CJavaInputStreamCallbacks()
50 {}
51
52 bool CJavaInputStreamCallbacks::Init(JNIEnv *env, jobject jLocator)
53 {
54 env->GetJavaVM(&m_jvm);
55 CJavaEnvironment javaEnv(m_jvm);
56
57 static jmethodID createConnectionHolder = 0;
58 if (0 == createConnectionHolder)
59 {
60 jclass klass = env->GetObjectClass(jLocator);
61 createConnectionHolder = env->GetMethodID(klass, "createConnectionHolder", "()Lcom/sun/media/jfxmedia/locator/ConnectionHolder;");
62 env->DeleteLocalRef(klass);
63 }
64
65 m_ConnectionHolder = env->NewGlobalRef(env->CallObjectMethod(jLocator, createConnectionHolder));
66 if (NULL == m_ConnectionHolder)
67 {
68 javaEnv.reportException();
69 return false;
70 }
71
72 static bool methodIDsInitialized = false;
73 if (!methodIDsInitialized)
74 {
75 // Get the parent abstract class. It's wrong to get method ids from the concrete implementation
76 // because it crashes jvm when it tries to call virtual methods.
77 // See https://javafx-jira.kenai.com/browse/RT-37115
78 jclass klass = env->FindClass("com/sun/media/jfxmedia/locator/ConnectionHolder");
79
80 m_BufferFID = env->GetFieldID(klass, "buffer", "Ljava/nio/ByteBuffer;");
81 m_NeedBufferMID = env->GetMethodID(klass, "needBuffer", "()Z");
82 m_ReadNextBlockMID = env->GetMethodID(klass, "readNextBlock", "()I");
83 m_ReadBlockMID = env->GetMethodID(klass, "readBlock", "(JI)I");
84 m_IsSeekableMID = env->GetMethodID(klass, "isSeekable", "()Z");
85 m_IsRandomAccessMID = env->GetMethodID(klass, "isRandomAccess", "()Z");
86 m_SeekMID = env->GetMethodID(klass, "seek", "(J)J");
87 m_CloseConnectionMID = env->GetMethodID(klass, "closeConnection", "()V");
88 m_PropertyMID = env->GetMethodID(klass, "property", "(II)I");
89 m_GetStreamSizeMID = env->GetMethodID(klass, "getStreamSize", "()I");
90
91 methodIDsInitialized = true;
92 env->DeleteLocalRef(klass);
93 }
94
95 javaEnv.reportException();
96 return true;
97 }
98
99 bool CJavaInputStreamCallbacks::NeedBuffer()
100 {
101 bool result = false;
102 CJavaEnvironment javaEnv(m_jvm);
103 JNIEnv *pEnv = javaEnv.getEnvironment();
104
105 if (pEnv) {
106 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
107 if (connection) {
108 result = (pEnv->CallBooleanMethod(connection, m_NeedBufferMID) == JNI_TRUE);
109 pEnv->DeleteLocalRef(connection);
110 }
111
112 javaEnv.reportException();
113 }
114
115 return result;
116 }
117
118 int CJavaInputStreamCallbacks::ReadNextBlock()
119 {
120 int result = -1;
121 CJavaEnvironment javaEnv(m_jvm);
122 JNIEnv *pEnv = javaEnv.getEnvironment();
123
124 if (pEnv) {
125 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
126 if (connection) {
127 result = pEnv->CallIntMethod(connection, m_ReadNextBlockMID);
128 pEnv->DeleteLocalRef(connection);
129 }
130
131 if (javaEnv.clearException()) {
132 result = -2;
133 }
134 }
135
136 return result;
137 }
138
139 int CJavaInputStreamCallbacks::ReadBlock(int64_t position, int size)
140 {
141 int result = -1;
142 CJavaEnvironment javaEnv(m_jvm);
143 JNIEnv *pEnv = javaEnv.getEnvironment();
144
145 if (pEnv) {
146 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
147 if (connection) {
148 result = pEnv->CallIntMethod(connection, m_ReadBlockMID, position, size);
149 pEnv->DeleteLocalRef(connection);
150 }
151
152 if (javaEnv.clearException()) {
153 result = -2;
154 }
155 }
156
157 return result;
158 }
159
160 void CJavaInputStreamCallbacks::CopyBlock(void* destination, int size)
161 {
162 CJavaEnvironment javaEnv(m_jvm);
163 JNIEnv *pEnv = javaEnv.getEnvironment();
164 if (pEnv) {
165 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
166 if (connection) {
167 jobject buffer = pEnv->GetObjectField(connection, m_BufferFID);
168 void *data = pEnv->GetDirectBufferAddress(buffer);
169
170 memcpy(destination, data, size);
171 pEnv->DeleteLocalRef(buffer);
172 pEnv->DeleteLocalRef(connection);
173 }
174 }
175 }
176
177 bool CJavaInputStreamCallbacks::IsSeekable()
178 {
179 CJavaEnvironment javaEnv(m_jvm);
180 JNIEnv *pEnv = javaEnv.getEnvironment();
181 bool result = false;
182
183 if (pEnv) {
184 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
185 if (connection) {
186 result = (pEnv->CallBooleanMethod(connection, m_IsSeekableMID) == JNI_TRUE);
187 pEnv->DeleteLocalRef(connection);
188 }
189
190 javaEnv.reportException();
191 }
192
193 return result;
194 }
195
196 bool CJavaInputStreamCallbacks::IsRandomAccess()
197 {
198 CJavaEnvironment javaEnv(m_jvm);
199 JNIEnv *pEnv = javaEnv.getEnvironment();
200 bool result = false;
201
202 if (pEnv) {
203 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
204 if (connection) {
205 result = (pEnv->CallBooleanMethod(connection, m_IsRandomAccessMID) == JNI_TRUE);
206 pEnv->DeleteLocalRef(connection);
207 }
208
209 javaEnv.reportException();
210 }
211
212 return result;
213 }
214
215 int64_t CJavaInputStreamCallbacks::Seek(int64_t position)
216 {
217 CJavaEnvironment javaEnv(m_jvm);
218 JNIEnv *pEnv = javaEnv.getEnvironment();
219 jlong result = -1;
220
221 if (pEnv) {
222 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
223 if (connection) {
224 result = pEnv->CallLongMethod(connection, m_SeekMID, (jlong)position);
225 pEnv->DeleteLocalRef(connection);
226 }
227
228 javaEnv.reportException();
229 }
230
231 return (int64_t)result;
232 }
233
234 void CJavaInputStreamCallbacks::CloseConnection()
235 {
236 CJavaEnvironment javaEnv(m_jvm);
237 JNIEnv *pEnv = javaEnv.getEnvironment();
238
239 if (pEnv) {
240 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
241 if (connection) {
242 pEnv->CallVoidMethod(connection, m_CloseConnectionMID);
243 pEnv->DeleteLocalRef(connection);
244
245 javaEnv.reportException();
246 }
247
248 pEnv->DeleteGlobalRef(m_ConnectionHolder);
249 m_ConnectionHolder = NULL;
250 }
251 }
252
253 int CJavaInputStreamCallbacks::Property(int prop, int value)
254 {
255 CJavaEnvironment javaEnv(m_jvm);
256 JNIEnv *pEnv = javaEnv.getEnvironment();
257 int result = 0;
258
259 if (pEnv) {
260 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
261 if (connection) {
262 result = pEnv->CallIntMethod(connection, m_PropertyMID, (jint)prop, (jint)value);
263 pEnv->DeleteLocalRef(connection);
264 }
265
266 javaEnv.reportException();
267 }
268
269 return result;
270 }
271
272 int CJavaInputStreamCallbacks::GetStreamSize()
273 {
274 CJavaEnvironment javaEnv(m_jvm);
275 JNIEnv *pEnv = javaEnv.getEnvironment();
276 int result = 0;
277
278 if (pEnv) {
279 jobject connection = pEnv->NewLocalRef(m_ConnectionHolder);
280 if (connection) {
281 result = pEnv->CallIntMethod(connection, m_GetStreamSizeMID);
282 pEnv->DeleteLocalRef(connection);
283 }
284
285 javaEnv.reportException();
286 }
287
288 return result;
289 }