DataSource.h revision 6511c9755c3a3360ba869772600c7aae048a7ffc
120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber/* 220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Copyright (C) 2009 The Android Open Source Project 320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * you may not use this file except in compliance with the License. 620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * You may obtain a copy of the License at 720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 1020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Unless required by applicable law or agreed to in writing, software 1120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 1220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * See the License for the specific language governing permissions and 1420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * limitations under the License. 1520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber */ 1620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#ifndef DATA_SOURCE_H_ 1820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#define DATA_SOURCE_H_ 2020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <sys/types.h> 2220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/Errors.h> 245561ccf4a8db88a2e44eac1b3ed13b4ff53a7f20Andreas Huber#include <utils/KeyedVector.h> 2520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/List.h> 26693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber#include <utils/RefBase.h> 2720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/threads.h> 28dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang#include <drm/DrmManagerClient.h> 2920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 3020111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubernamespace android { 3120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 325a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huberstruct AMessage; 3320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberclass String8; 3420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 35693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huberclass DataSource : public RefBase { 3620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberpublic: 3766b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber enum Flags { 38acdd9d0f59c3d8bdc3de80664a609527ec3d21e2Andreas Huber kWantsPrefetching = 1, 39acdd9d0f59c3d8bdc3de80664a609527ec3d21e2Andreas Huber kStreamedFromLocalHost = 2, 40bff07d0b22a5ee2d9f044f6cb5e4be1532017ab0Andreas Huber kIsCachingDataSource = 4, 4166b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber }; 4266b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber 435561ccf4a8db88a2e44eac1b3ed13b4ff53a7f20Andreas Huber static sp<DataSource> CreateFromURI( 445561ccf4a8db88a2e44eac1b3ed13b4ff53a7f20Andreas Huber const char *uri, 455561ccf4a8db88a2e44eac1b3ed13b4ff53a7f20Andreas Huber const KeyedVector<String8, String8> *headers = NULL); 46fc9ba09e3bb368f823d473f5e2bb9aa32dba6289Andreas Huber 4720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber DataSource() {} 4820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4934769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber virtual status_t initCheck() const = 0; 5034769bc913e9f6bb138e666d94a9d685bf3da217Andreas Huber 51c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong virtual ssize_t readAt(off64_t offset, void *data, size_t size) = 0; 5220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 53693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber // Convenience methods: 54c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong bool getUInt16(off64_t offset, uint16_t *x); 55693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 5620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber // May return ERROR_UNSUPPORTED. 57c7fc37a3dab9bd1f96713649f351b5990e6316ffJames Dong virtual status_t getSize(off64_t *size); 5820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 5966b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber virtual uint32_t flags() { 6066b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber return 0; 6166b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber } 6266b0a35c9a4136a84c3f73b1b25fcb5220138b95Andreas Huber 6320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber //////////////////////////////////////////////////////////////////////////// 6420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 655a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber bool sniff(String8 *mimeType, float *confidence, sp<AMessage> *meta); 6620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 675a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // The sniffer can optionally fill in "meta" with an AMessage containing 685a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // a dictionary of values that helps the corresponding extractor initialize 695a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber // its state without duplicating effort already exerted by the sniffer. 7020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber typedef bool (*SnifferFunc)( 715a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber const sp<DataSource> &source, String8 *mimeType, 725a1c3529e4fa2f8a11054181294e0ce79fff8dd3Andreas Huber float *confidence, sp<AMessage> *meta); 7320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 7420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber static void RegisterSniffer(SnifferFunc func); 7520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber static void RegisterDefaultSniffers(); 7620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 77dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang // for DRM 78b5ce361d19e69fe156f7188c9ee0f4734b259874Gloria Wang virtual sp<DecryptHandle> DrmInitialization() { 79dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang return NULL; 80dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang } 81b5ce361d19e69fe156f7188c9ee0f4734b259874Gloria Wang virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client) {}; 82dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang 83771b85d9245a24273497792a2515d88d31c99e1eGloria Wang virtual String8 getUri() { 84771b85d9245a24273497792a2515d88d31c99e1eGloria Wang return String8(); 85771b85d9245a24273497792a2515d88d31c99e1eGloria Wang } 86dcd25efb46c41c8d24a0a9cf61fb57f84149709eGloria Wang 876511c9755c3a3360ba869772600c7aae048a7ffcAndreas Huber virtual String8 getMIMEType() const; 886511c9755c3a3360ba869772600c7aae048a7ffcAndreas Huber 89693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huberprotected: 90693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber virtual ~DataSource() {} 91693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 9220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberprivate: 9320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber static Mutex gSnifferMutex; 9420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber static List<SnifferFunc> gSniffers; 9520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 9620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber DataSource(const DataSource &); 9720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber DataSource &operator=(const DataSource &); 9820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber}; 9920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 10020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} // namespace android 10120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 10220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#endif // DATA_SOURCE_H_ 103