1 /* 2 * Copyright (C) 2009 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 //#define LOG_NDEBUG 0 17 #define LOG_TAG "DataSource" 18 19 #include "include/CallbackDataSource.h" 20 #include "include/HTTPBase.h" 21 #include "include/NuCachedSource2.h" 22 23 #include <media/IDataSource.h> 24 #include <media/IMediaHTTPConnection.h> 25 #include <media/IMediaHTTPService.h> 26 #include <media/stagefright/foundation/ADebug.h> 27 #include <media/stagefright/foundation/AMessage.h> 28 #include <media/stagefright/DataSource.h> 29 #include <media/stagefright/DataURISource.h> 30 #include <media/stagefright/FileSource.h> 31 #include <media/stagefright/MediaErrors.h> 32 #include <media/stagefright/MediaHTTP.h> 33 #include <media/stagefright/RemoteDataSource.h> 34 #include <media/stagefright/Utils.h> 35 #include <utils/String8.h> 36 37 #include <cutils/properties.h> 38 39 #include <private/android_filesystem_config.h> 40 41 namespace android { 42 43 bool DataSource::getUInt16(off64_t offset, uint16_t *x) { 44 *x = 0; 45 46 uint8_t byte[2]; 47 if (readAt(offset, byte, 2) != 2) { 48 return false; 49 } 50 51 *x = (byte[0] << 8) | byte[1]; 52 53 return true; 54 } 55 56 bool DataSource::getUInt24(off64_t offset, uint32_t *x) { 57 *x = 0; 58 59 uint8_t byte[3]; 60 if (readAt(offset, byte, 3) != 3) { 61 return false; 62 } 63 64 *x = (byte[0] << 16) | (byte[1] << 8) | byte[2]; 65 66 return true; 67 } 68 69 bool DataSource::getUInt32(off64_t offset, uint32_t *x) { 70 *x = 0; 71 72 uint32_t tmp; 73 if (readAt(offset, &tmp, 4) != 4) { 74 return false; 75 } 76 77 *x = ntohl(tmp); 78 79 return true; 80 } 81 82 bool DataSource::getUInt64(off64_t offset, uint64_t *x) { 83 *x = 0; 84 85 uint64_t tmp; 86 if (readAt(offset, &tmp, 8) != 8) { 87 return false; 88 } 89 90 *x = ntoh64(tmp); 91 92 return true; 93 } 94 95 bool DataSource::getUInt16Var(off64_t offset, uint16_t *x, size_t size) { 96 if (size == 2) { 97 return getUInt16(offset, x); 98 } 99 if (size == 1) { 100 uint8_t tmp; 101 if (readAt(offset, &tmp, 1) == 1) { 102 *x = tmp; 103 return true; 104 } 105 } 106 return false; 107 } 108 109 bool DataSource::getUInt32Var(off64_t offset, uint32_t *x, size_t size) { 110 if (size == 4) { 111 return getUInt32(offset, x); 112 } 113 if (size == 2) { 114 uint16_t tmp; 115 if (getUInt16(offset, &tmp)) { 116 *x = tmp; 117 return true; 118 } 119 } 120 return false; 121 } 122 123 bool DataSource::getUInt64Var(off64_t offset, uint64_t *x, size_t size) { 124 if (size == 8) { 125 return getUInt64(offset, x); 126 } 127 if (size == 4) { 128 uint32_t tmp; 129 if (getUInt32(offset, &tmp)) { 130 *x = tmp; 131 return true; 132 } 133 } 134 return false; 135 } 136 137 status_t DataSource::getSize(off64_t *size) { 138 *size = 0; 139 140 return ERROR_UNSUPPORTED; 141 } 142 143 sp<IDataSource> DataSource::getIDataSource() const { 144 return nullptr; 145 } 146 147 //////////////////////////////////////////////////////////////////////////////// 148 149 // static 150 sp<DataSource> DataSource::CreateFromURI( 151 const sp<IMediaHTTPService> &httpService, 152 const char *uri, 153 const KeyedVector<String8, String8> *headers, 154 String8 *contentType, 155 HTTPBase *httpSource) { 156 if (contentType != NULL) { 157 *contentType = ""; 158 } 159 160 sp<DataSource> source; 161 if (!strncasecmp("file://", uri, 7)) { 162 source = new FileSource(uri + 7); 163 } else if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) { 164 if (httpService == NULL) { 165 ALOGE("Invalid http service!"); 166 return NULL; 167 } 168 169 if (httpSource == NULL) { 170 sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection(); 171 if (conn == NULL) { 172 ALOGE("Failed to make http connection from http service!"); 173 return NULL; 174 } 175 httpSource = new MediaHTTP(conn); 176 } 177 178 String8 cacheConfig; 179 bool disconnectAtHighwatermark = false; 180 KeyedVector<String8, String8> nonCacheSpecificHeaders; 181 if (headers != NULL) { 182 nonCacheSpecificHeaders = *headers; 183 NuCachedSource2::RemoveCacheSpecificHeaders( 184 &nonCacheSpecificHeaders, 185 &cacheConfig, 186 &disconnectAtHighwatermark); 187 } 188 189 if (httpSource->connect(uri, &nonCacheSpecificHeaders) != OK) { 190 ALOGE("Failed to connect http source!"); 191 return NULL; 192 } 193 194 if (contentType != NULL) { 195 *contentType = httpSource->getMIMEType(); 196 } 197 198 source = NuCachedSource2::Create( 199 httpSource, 200 cacheConfig.isEmpty() ? NULL : cacheConfig.string(), 201 disconnectAtHighwatermark); 202 } else if (!strncasecmp("data:", uri, 5)) { 203 source = DataURISource::Create(uri); 204 } else { 205 // Assume it's a filename. 206 source = new FileSource(uri); 207 } 208 209 if (source == NULL || source->initCheck() != OK) { 210 return NULL; 211 } 212 213 return source; 214 } 215 216 sp<DataSource> DataSource::CreateFromFd(int fd, int64_t offset, int64_t length) { 217 sp<FileSource> source = new FileSource(fd, offset, length); 218 return source->initCheck() != OK ? nullptr : source; 219 } 220 221 sp<DataSource> DataSource::CreateMediaHTTP(const sp<IMediaHTTPService> &httpService) { 222 if (httpService == NULL) { 223 return NULL; 224 } 225 226 sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection(); 227 if (conn == NULL) { 228 return NULL; 229 } else { 230 return new MediaHTTP(conn); 231 } 232 } 233 234 sp<DataSource> DataSource::CreateFromIDataSource(const sp<IDataSource> &source) { 235 return new TinyCacheSource(new CallbackDataSource(source)); 236 } 237 238 String8 DataSource::getMIMEType() const { 239 return String8("application/octet-stream"); 240 } 241 242 sp<IDataSource> DataSource::asIDataSource() { 243 return RemoteDataSource::wrap(sp<DataSource>(this)); 244 } 245 246 } // namespace android 247
