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/AMRExtractor.h" 20 21 #include "include/AACExtractor.h" 22 #include "include/CallbackDataSource.h" 23 #include "include/DRMExtractor.h" 24 #include "include/FLACExtractor.h" 25 #include "include/HTTPBase.h" 26 #include "include/MidiExtractor.h" 27 #include "include/MP3Extractor.h" 28 #include "include/MPEG2PSExtractor.h" 29 #include "include/MPEG2TSExtractor.h" 30 #include "include/MPEG4Extractor.h" 31 #include "include/NuCachedSource2.h" 32 #include "include/OggExtractor.h" 33 #include "include/WAVExtractor.h" 34 #include "include/WVMExtractor.h" 35 36 #include "matroska/MatroskaExtractor.h" 37 38 #include <media/IMediaHTTPConnection.h> 39 #include <media/IMediaHTTPService.h> 40 #include <media/stagefright/foundation/ADebug.h> 41 #include <media/stagefright/foundation/AMessage.h> 42 #include <media/stagefright/DataSource.h> 43 #include <media/stagefright/DataURISource.h> 44 #include <media/stagefright/FileSource.h> 45 #include <media/stagefright/MediaErrors.h> 46 #include <media/stagefright/MediaHTTP.h> 47 #include <utils/String8.h> 48 49 #include <cutils/properties.h> 50 51 namespace android { 52 53 bool DataSource::getUInt16(off64_t offset, uint16_t *x) { 54 *x = 0; 55 56 uint8_t byte[2]; 57 if (readAt(offset, byte, 2) != 2) { 58 return false; 59 } 60 61 *x = (byte[0] << 8) | byte[1]; 62 63 return true; 64 } 65 66 bool DataSource::getUInt24(off64_t offset, uint32_t *x) { 67 *x = 0; 68 69 uint8_t byte[3]; 70 if (readAt(offset, byte, 3) != 3) { 71 return false; 72 } 73 74 *x = (byte[0] << 16) | (byte[1] << 8) | byte[2]; 75 76 return true; 77 } 78 79 bool DataSource::getUInt32(off64_t offset, uint32_t *x) { 80 *x = 0; 81 82 uint32_t tmp; 83 if (readAt(offset, &tmp, 4) != 4) { 84 return false; 85 } 86 87 *x = ntohl(tmp); 88 89 return true; 90 } 91 92 bool DataSource::getUInt64(off64_t offset, uint64_t *x) { 93 *x = 0; 94 95 uint64_t tmp; 96 if (readAt(offset, &tmp, 8) != 8) { 97 return false; 98 } 99 100 *x = ntoh64(tmp); 101 102 return true; 103 } 104 105 status_t DataSource::getSize(off64_t *size) { 106 *size = 0; 107 108 return ERROR_UNSUPPORTED; 109 } 110 111 //////////////////////////////////////////////////////////////////////////////// 112 113 Mutex DataSource::gSnifferMutex; 114 List<DataSource::SnifferFunc> DataSource::gSniffers; 115 bool DataSource::gSniffersRegistered = false; 116 117 bool DataSource::sniff( 118 String8 *mimeType, float *confidence, sp<AMessage> *meta) { 119 *mimeType = ""; 120 *confidence = 0.0f; 121 meta->clear(); 122 123 { 124 Mutex::Autolock autoLock(gSnifferMutex); 125 if (!gSniffersRegistered) { 126 return false; 127 } 128 } 129 130 for (List<SnifferFunc>::iterator it = gSniffers.begin(); 131 it != gSniffers.end(); ++it) { 132 String8 newMimeType; 133 float newConfidence; 134 sp<AMessage> newMeta; 135 if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) { 136 if (newConfidence > *confidence) { 137 *mimeType = newMimeType; 138 *confidence = newConfidence; 139 *meta = newMeta; 140 } 141 } 142 } 143 144 return *confidence > 0.0; 145 } 146 147 // static 148 void DataSource::RegisterSniffer_l(SnifferFunc func) { 149 for (List<SnifferFunc>::iterator it = gSniffers.begin(); 150 it != gSniffers.end(); ++it) { 151 if (*it == func) { 152 return; 153 } 154 } 155 156 gSniffers.push_back(func); 157 } 158 159 // static 160 void DataSource::RegisterDefaultSniffers() { 161 Mutex::Autolock autoLock(gSnifferMutex); 162 if (gSniffersRegistered) { 163 return; 164 } 165 166 RegisterSniffer_l(SniffMPEG4); 167 RegisterSniffer_l(SniffMatroska); 168 RegisterSniffer_l(SniffOgg); 169 RegisterSniffer_l(SniffWAV); 170 RegisterSniffer_l(SniffFLAC); 171 RegisterSniffer_l(SniffAMR); 172 RegisterSniffer_l(SniffMPEG2TS); 173 RegisterSniffer_l(SniffMP3); 174 RegisterSniffer_l(SniffAAC); 175 RegisterSniffer_l(SniffMPEG2PS); 176 RegisterSniffer_l(SniffWVM); 177 RegisterSniffer_l(SniffMidi); 178 179 char value[PROPERTY_VALUE_MAX]; 180 if (property_get("drm.service.enabled", value, NULL) 181 && (!strcmp(value, "1") || !strcasecmp(value, "true"))) { 182 RegisterSniffer_l(SniffDRM); 183 } 184 gSniffersRegistered = true; 185 } 186 187 // static 188 sp<DataSource> DataSource::CreateFromURI( 189 const sp<IMediaHTTPService> &httpService, 190 const char *uri, 191 const KeyedVector<String8, String8> *headers, 192 String8 *contentType, 193 HTTPBase *httpSource) { 194 if (contentType != NULL) { 195 *contentType = ""; 196 } 197 198 bool isWidevine = !strncasecmp("widevine://", uri, 11); 199 200 sp<DataSource> source; 201 if (!strncasecmp("file://", uri, 7)) { 202 source = new FileSource(uri + 7); 203 } else if (!strncasecmp("http://", uri, 7) 204 || !strncasecmp("https://", uri, 8) 205 || isWidevine) { 206 if (httpService == NULL) { 207 ALOGE("Invalid http service!"); 208 return NULL; 209 } 210 211 if (httpSource == NULL) { 212 sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection(); 213 if (conn == NULL) { 214 ALOGE("Failed to make http connection from http service!"); 215 return NULL; 216 } 217 httpSource = new MediaHTTP(conn); 218 } 219 220 String8 tmp; 221 if (isWidevine) { 222 tmp = String8("http://"); 223 tmp.append(uri + 11); 224 225 uri = tmp.string(); 226 } 227 228 String8 cacheConfig; 229 bool disconnectAtHighwatermark; 230 KeyedVector<String8, String8> nonCacheSpecificHeaders; 231 if (headers != NULL) { 232 nonCacheSpecificHeaders = *headers; 233 NuCachedSource2::RemoveCacheSpecificHeaders( 234 &nonCacheSpecificHeaders, 235 &cacheConfig, 236 &disconnectAtHighwatermark); 237 } 238 239 if (httpSource->connect(uri, &nonCacheSpecificHeaders) != OK) { 240 ALOGE("Failed to connect http source!"); 241 return NULL; 242 } 243 244 if (!isWidevine) { 245 if (contentType != NULL) { 246 *contentType = httpSource->getMIMEType(); 247 } 248 249 source = new NuCachedSource2( 250 httpSource, 251 cacheConfig.isEmpty() ? NULL : cacheConfig.string(), 252 disconnectAtHighwatermark); 253 } else { 254 // We do not want that prefetching, caching, datasource wrapper 255 // in the widevine:// case. 256 source = httpSource; 257 } 258 } else if (!strncasecmp("data:", uri, 5)) { 259 source = DataURISource::Create(uri); 260 } else { 261 // Assume it's a filename. 262 source = new FileSource(uri); 263 } 264 265 if (source == NULL || source->initCheck() != OK) { 266 return NULL; 267 } 268 269 return source; 270 } 271 272 sp<DataSource> DataSource::CreateMediaHTTP(const sp<IMediaHTTPService> &httpService) { 273 if (httpService == NULL) { 274 return NULL; 275 } 276 277 sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection(); 278 if (conn == NULL) { 279 return NULL; 280 } else { 281 return new MediaHTTP(conn); 282 } 283 } 284 285 sp<DataSource> DataSource::CreateFromIDataSource(const sp<IDataSource> &source) { 286 return new TinyCacheSource(new CallbackDataSource(source)); 287 } 288 289 String8 DataSource::getMIMEType() const { 290 return String8("application/octet-stream"); 291 } 292 293 } // namespace android 294