1 /* 2 * Copyright (C) 2014 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 "NdkMediaExtractor" 19 20 21 #include "NdkMediaError.h" 22 #include "NdkMediaExtractor.h" 23 #include "NdkMediaFormatPriv.h" 24 25 26 #include <utils/Log.h> 27 #include <utils/StrongPointer.h> 28 #include <media/hardware/CryptoAPI.h> 29 #include <media/stagefright/foundation/ABuffer.h> 30 #include <media/stagefright/foundation/AMessage.h> 31 #include <media/stagefright/MetaData.h> 32 #include <media/stagefright/NuMediaExtractor.h> 33 #include <media/IMediaHTTPService.h> 34 #include <android_runtime/AndroidRuntime.h> 35 #include <android_util_Binder.h> 36 37 #include <jni.h> 38 39 using namespace android; 40 41 static media_status_t translate_error(status_t err) { 42 if (err == OK) { 43 return AMEDIA_OK; 44 } 45 ALOGE("sf error code: %d", err); 46 return AMEDIA_ERROR_UNKNOWN; 47 } 48 49 struct AMediaExtractor { 50 sp<NuMediaExtractor> mImpl; 51 sp<ABuffer> mPsshBuf; 52 53 }; 54 55 extern "C" { 56 57 EXPORT 58 AMediaExtractor* AMediaExtractor_new() { 59 ALOGV("ctor"); 60 AMediaExtractor *mData = new AMediaExtractor(); 61 mData->mImpl = new NuMediaExtractor(); 62 return mData; 63 } 64 65 EXPORT 66 media_status_t AMediaExtractor_delete(AMediaExtractor *mData) { 67 ALOGV("dtor"); 68 delete mData; 69 return AMEDIA_OK; 70 } 71 72 EXPORT 73 media_status_t AMediaExtractor_setDataSourceFd(AMediaExtractor *mData, int fd, off64_t offset, 74 off64_t length) { 75 ALOGV("setDataSource(%d, %lld, %lld)", fd, offset, length); 76 return translate_error(mData->mImpl->setDataSource(fd, offset, length)); 77 } 78 79 EXPORT 80 media_status_t AMediaExtractor_setDataSource(AMediaExtractor *mData, const char *location) { 81 ALOGV("setDataSource(%s)", location); 82 // TODO: add header support 83 84 JNIEnv *env = AndroidRuntime::getJNIEnv(); 85 jobject service = NULL; 86 if (env == NULL) { 87 ALOGE("setDataSource(path) must be called from Java thread"); 88 env->ExceptionClear(); 89 return AMEDIA_ERROR_UNSUPPORTED; 90 } 91 92 jclass mediahttpclass = env->FindClass("android/media/MediaHTTPService"); 93 if (mediahttpclass == NULL) { 94 ALOGE("can't find MediaHttpService"); 95 env->ExceptionClear(); 96 return AMEDIA_ERROR_UNSUPPORTED; 97 } 98 99 jmethodID mediaHttpCreateMethod = env->GetStaticMethodID(mediahttpclass, 100 "createHttpServiceBinderIfNecessary", "(Ljava/lang/String;)Landroid/os/IBinder;"); 101 if (mediaHttpCreateMethod == NULL) { 102 ALOGE("can't find method"); 103 env->ExceptionClear(); 104 return AMEDIA_ERROR_UNSUPPORTED; 105 } 106 107 jstring jloc = env->NewStringUTF(location); 108 109 service = env->CallStaticObjectMethod(mediahttpclass, mediaHttpCreateMethod, jloc); 110 env->DeleteLocalRef(jloc); 111 112 sp<IMediaHTTPService> httpService; 113 if (service != NULL) { 114 sp<IBinder> binder = ibinderForJavaObject(env, service); 115 httpService = interface_cast<IMediaHTTPService>(binder); 116 } 117 118 status_t err = mData->mImpl->setDataSource(httpService, location, NULL); 119 env->ExceptionClear(); 120 return translate_error(err); 121 } 122 123 EXPORT 124 size_t AMediaExtractor_getTrackCount(AMediaExtractor *mData) { 125 return mData->mImpl->countTracks(); 126 } 127 128 EXPORT 129 AMediaFormat* AMediaExtractor_getTrackFormat(AMediaExtractor *mData, size_t idx) { 130 sp<AMessage> format; 131 mData->mImpl->getTrackFormat(idx, &format); 132 return AMediaFormat_fromMsg(&format); 133 } 134 135 EXPORT 136 media_status_t AMediaExtractor_selectTrack(AMediaExtractor *mData, size_t idx) { 137 ALOGV("selectTrack(%zu)", idx); 138 return translate_error(mData->mImpl->selectTrack(idx)); 139 } 140 141 EXPORT 142 media_status_t AMediaExtractor_unselectTrack(AMediaExtractor *mData, size_t idx) { 143 ALOGV("unselectTrack(%zu)", idx); 144 return translate_error(mData->mImpl->unselectTrack(idx)); 145 } 146 147 EXPORT 148 bool AMediaExtractor_advance(AMediaExtractor *mData) { 149 //ALOGV("advance"); 150 return mData->mImpl->advance(); 151 } 152 153 EXPORT 154 media_status_t AMediaExtractor_seekTo(AMediaExtractor *ex, int64_t seekPosUs, SeekMode mode) { 155 android::MediaSource::ReadOptions::SeekMode sfmode; 156 if (mode == AMEDIAEXTRACTOR_SEEK_PREVIOUS_SYNC) { 157 sfmode = android::MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC; 158 } else if (mode == AMEDIAEXTRACTOR_SEEK_CLOSEST_SYNC) { 159 sfmode = android::MediaSource::ReadOptions::SEEK_CLOSEST_SYNC; 160 } else { 161 sfmode = android::MediaSource::ReadOptions::SEEK_NEXT_SYNC; 162 } 163 164 return translate_error(ex->mImpl->seekTo(seekPosUs, sfmode)); 165 } 166 167 EXPORT 168 ssize_t AMediaExtractor_readSampleData(AMediaExtractor *mData, uint8_t *buffer, size_t capacity) { 169 //ALOGV("readSampleData"); 170 sp<ABuffer> tmp = new ABuffer(buffer, capacity); 171 if (mData->mImpl->readSampleData(tmp) == OK) { 172 return tmp->size(); 173 } 174 return -1; 175 } 176 177 EXPORT 178 uint32_t AMediaExtractor_getSampleFlags(AMediaExtractor *mData) { 179 int sampleFlags = 0; 180 sp<MetaData> meta; 181 status_t err = mData->mImpl->getSampleMeta(&meta); 182 if (err != OK) { 183 return -1; 184 } 185 int32_t val; 186 if (meta->findInt32(kKeyIsSyncFrame, &val) && val != 0) { 187 sampleFlags |= AMEDIAEXTRACTOR_SAMPLE_FLAG_SYNC; 188 } 189 190 uint32_t type; 191 const void *data; 192 size_t size; 193 if (meta->findData(kKeyEncryptedSizes, &type, &data, &size)) { 194 sampleFlags |= AMEDIAEXTRACTOR_SAMPLE_FLAG_ENCRYPTED; 195 } 196 return sampleFlags; 197 } 198 199 EXPORT 200 int AMediaExtractor_getSampleTrackIndex(AMediaExtractor *mData) { 201 size_t idx; 202 if (mData->mImpl->getSampleTrackIndex(&idx) != OK) { 203 return -1; 204 } 205 return idx; 206 } 207 208 EXPORT 209 int64_t AMediaExtractor_getSampleTime(AMediaExtractor *mData) { 210 int64_t time; 211 if (mData->mImpl->getSampleTime(&time) != OK) { 212 return -1; 213 } 214 return time; 215 } 216 217 EXPORT 218 PsshInfo* AMediaExtractor_getPsshInfo(AMediaExtractor *ex) { 219 220 if (ex->mPsshBuf != NULL) { 221 return (PsshInfo*) ex->mPsshBuf->data(); 222 } 223 224 sp<AMessage> format; 225 ex->mImpl->getFileFormat(&format); 226 sp<ABuffer> buffer; 227 if(!format->findBuffer("pssh", &buffer)) { 228 return NULL; 229 } 230 231 // the format of the buffer is 1 or more of: 232 // { 233 // 16 byte uuid 234 // 4 byte data length N 235 // N bytes of data 236 // } 237 238 // Determine the number of entries in the source data. 239 // Since we got the data from stagefright, we trust it is valid and properly formatted. 240 const uint8_t* data = buffer->data(); 241 size_t len = buffer->size(); 242 size_t numentries = 0; 243 while (len > 0) { 244 numentries++; 245 246 // skip uuid 247 data += 16; 248 len -= 16; 249 250 // get data length 251 uint32_t datalen = *((uint32_t*)data); 252 data += 4; 253 len -= 4; 254 255 // skip the data 256 data += datalen; 257 len -= datalen; 258 } 259 260 // there are <numentries> in the source buffer, we need 261 // (source buffer size) - (sizeof(uint32_t) * numentries) + sizeof(size_t) 262 // + ((sizeof(void*) + sizeof(size_t)) * numentries) bytes for the PsshInfo structure 263 // Or in other words, the data lengths in the source structure are replaced by size_t 264 // (which may be the same size or larger, for 64 bit), and in addition there is an 265 // extra pointer for each entry, and an extra size_t for the entire PsshInfo. 266 size_t newsize = buffer->size() - (sizeof(uint32_t) * numentries) + sizeof(size_t) 267 + ((sizeof(void*) + sizeof(size_t)) * numentries); 268 ex->mPsshBuf = new ABuffer(newsize); 269 ex->mPsshBuf->setRange(0, newsize); 270 271 // copy data 272 const uint8_t* src = buffer->data(); 273 uint8_t* dst = ex->mPsshBuf->data(); 274 uint8_t* dstdata = dst + sizeof(size_t) + numentries * sizeof(PsshEntry); 275 *((size_t*)dst) = numentries; 276 dst += sizeof(size_t); 277 for (size_t i = 0; i < numentries; i++) { 278 // copy uuid 279 memcpy(dst, src, 16); 280 src += 16; 281 dst += 16; 282 283 // get/copy data length 284 uint32_t datalen = *((uint32_t*)src); 285 *((size_t*)dst) = datalen; 286 src += sizeof(uint32_t); 287 dst += sizeof(size_t); 288 289 // the next entry in the destination is a pointer to the actual data, which we store 290 // after the array of PsshEntry 291 *((void**)dst) = dstdata; 292 dst += sizeof(void*); 293 294 // copy the actual data 295 memcpy(dstdata, src, datalen); 296 dstdata += datalen; 297 src += datalen; 298 } 299 300 return (PsshInfo*) ex->mPsshBuf->data(); 301 } 302 303 EXPORT 304 AMediaCodecCryptoInfo *AMediaExtractor_getSampleCryptoInfo(AMediaExtractor *ex) { 305 sp<MetaData> meta; 306 if(ex->mImpl->getSampleMeta(&meta) != 0) { 307 return NULL; 308 } 309 310 uint32_t type; 311 const void *crypteddata; 312 size_t cryptedsize; 313 if (!meta->findData(kKeyEncryptedSizes, &type, &crypteddata, &cryptedsize)) { 314 return NULL; 315 } 316 size_t numSubSamples = cryptedsize / sizeof(size_t); 317 318 const void *cleardata; 319 size_t clearsize; 320 if (meta->findData(kKeyPlainSizes, &type, &cleardata, &clearsize)) { 321 if (clearsize != cryptedsize) { 322 // The two must be of the same length. 323 return NULL; 324 } 325 } 326 327 const void *key; 328 size_t keysize; 329 if (meta->findData(kKeyCryptoIV, &type, &key, &keysize)) { 330 if (keysize != 16) { 331 // IVs must be 16 bytes in length. 332 return NULL; 333 } 334 } 335 336 const void *iv; 337 size_t ivsize; 338 if (meta->findData(kKeyCryptoIV, &type, &iv, &ivsize)) { 339 if (ivsize != 16) { 340 // IVs must be 16 bytes in length. 341 return NULL; 342 } 343 } 344 345 int32_t mode; 346 if (!meta->findInt32(kKeyCryptoMode, &mode)) { 347 mode = CryptoPlugin::kMode_AES_CTR; 348 } 349 350 return AMediaCodecCryptoInfo_new( 351 numSubSamples, 352 (uint8_t*) key, 353 (uint8_t*) iv, 354 (cryptoinfo_mode_t) mode, 355 (size_t*) cleardata, 356 (size_t*) crypteddata); 357 } 358 359 360 } // extern "C" 361 362