1 /*
2 * Copyright (c) 2010, 2014, 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 if (m_ConnectionHolder && pEnv)
105 {
106 result = (pEnv->CallBooleanMethod(m_ConnectionHolder, m_NeedBufferMID) == JNI_TRUE);
107 javaEnv.reportException();
108 }
109
110 return result;
111 }
112
113 int CJavaInputStreamCallbacks::ReadNextBlock()
114 {
115 int result = -1;
116 CJavaEnvironment javaEnv(m_jvm);
117 JNIEnv *pEnv = javaEnv.getEnvironment();
118
119 if (m_ConnectionHolder && pEnv) {
120 result = pEnv->CallIntMethod(m_ConnectionHolder, m_ReadNextBlockMID);
121 if (javaEnv.clearException()) {
122 result = -2;
123 }
124 }
125
126 return result;
127 }
128
129 int CJavaInputStreamCallbacks::ReadBlock(int64_t position, int size)
130 {
131 int result = -1;
132 CJavaEnvironment javaEnv(m_jvm);
133 JNIEnv *pEnv = javaEnv.getEnvironment();
134
135 if (m_ConnectionHolder && pEnv)
136 {
137 result = pEnv->CallIntMethod(m_ConnectionHolder, m_ReadBlockMID, position, size);
138 if (javaEnv.clearException()) {
139 result = -2;
140 }
141 }
142
143 return result;
144 }
145
146 void CJavaInputStreamCallbacks::CopyBlock(void* destination, int size)
147 {
148 CJavaEnvironment javaEnv(m_jvm);
149 JNIEnv *pEnv = javaEnv.getEnvironment();
150 if (m_ConnectionHolder && pEnv)
151 {
152 jobject buffer = pEnv->GetObjectField(m_ConnectionHolder, m_BufferFID);
153 void *data = pEnv->GetDirectBufferAddress(buffer);
154
155 memcpy(destination, data, size);
156 pEnv->DeleteLocalRef(buffer);
157 }
158 }
159
160 bool CJavaInputStreamCallbacks::IsSeekable()
161 {
162 CJavaEnvironment javaEnv(m_jvm);
163 JNIEnv *pEnv = javaEnv.getEnvironment();
164 bool result = false;
165
166 if (m_ConnectionHolder && pEnv)
167 {
168 result = (pEnv->CallBooleanMethod(m_ConnectionHolder, m_IsSeekableMID) == JNI_TRUE);
169 javaEnv.reportException();
170 }
171
172 return result;
173 }
174
175 bool CJavaInputStreamCallbacks::IsRandomAccess()
176 {
177 CJavaEnvironment javaEnv(m_jvm);
178 JNIEnv *pEnv = javaEnv.getEnvironment();
179 bool result = false;
180
181 if (m_ConnectionHolder && pEnv)
182 {
183 result = (pEnv->CallBooleanMethod(m_ConnectionHolder, m_IsRandomAccessMID) == JNI_TRUE);
184 javaEnv.reportException();
185 }
186
187 return result;
188 }
189
190 int64_t CJavaInputStreamCallbacks::Seek(int64_t position)
191 {
192 CJavaEnvironment javaEnv(m_jvm);
193 JNIEnv *pEnv = javaEnv.getEnvironment();
194 jlong result = -1;
195
196 if (m_ConnectionHolder && pEnv)
197 {
198 result = pEnv->CallLongMethod(m_ConnectionHolder, m_SeekMID, (jlong)position);
199 javaEnv.reportException();
200 }
201
202 return (int64_t)result;
203 }
204
205 void CJavaInputStreamCallbacks::CloseConnection()
206 {
207 CJavaEnvironment javaEnv(m_jvm);
208 JNIEnv *pEnv = javaEnv.getEnvironment();
209 if (m_ConnectionHolder && pEnv)
210 {
211 pEnv->CallVoidMethod(m_ConnectionHolder, m_CloseConnectionMID);
212 javaEnv.reportException();
213 pEnv->DeleteGlobalRef(m_ConnectionHolder);
214 m_ConnectionHolder = NULL;
215 }
216 }
217
218 int CJavaInputStreamCallbacks::Property(int prop, int value)
219 {
220 CJavaEnvironment javaEnv(m_jvm);
221 JNIEnv *pEnv = javaEnv.getEnvironment();
222 int result = 0;
223
224 if (m_ConnectionHolder && pEnv)
225 {
226 result = pEnv->CallIntMethod(m_ConnectionHolder, m_PropertyMID, (jint)prop, (jint)value);
227 javaEnv.reportException();
228 }
229
230 return result;
231 }
232
233 int CJavaInputStreamCallbacks::GetStreamSize()
234 {
235 CJavaEnvironment javaEnv(m_jvm);
236 JNIEnv *pEnv = javaEnv.getEnvironment();
237 int result = 0;
238
239 if (m_ConnectionHolder && pEnv)
240 {
241 result = pEnv->CallIntMethod(m_ConnectionHolder, m_GetStreamSizeMID);
242 javaEnv.reportException();
243 }
244
245 return result;
246 }