DataSource.h revision 05f625c46b992ab66b8d1527a366fe2746b4e3c7
1e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* 2e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Copyright (C) 2009 The Android Open Source Project 3e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 4e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Licensed under the Apache License, Version 2.0 (the "License"); 5e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * you may not use this file except in compliance with the License. 6e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * You may obtain a copy of the License at 7e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 8e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * http://www.apache.org/licenses/LICENSE-2.0 9e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 10e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Unless required by applicable law or agreed to in writing, software 11e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * distributed under the License is distributed on an "AS IS" BASIS, 12e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * See the License for the specific language governing permissions and 14e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * limitations under the License. 15e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 16e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 17e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#ifndef DATA_SOURCE_H_ 18e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 19e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#define DATA_SOURCE_H_ 20e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 21e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <sys/types.h> 22e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 23e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <media/stagefright/MediaErrors.h> 24e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <utils/Errors.h> 25e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <utils/KeyedVector.h> 26e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <utils/List.h> 27e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <utils/RefBase.h> 28e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <utils/threads.h> 29e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <drm/DrmManagerClient.h> 30e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 31e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengnamespace android { 32e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 33e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengstruct AMessage; 34e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengclass String8; 35e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 36e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengclass DataSource : public RefBase { 37e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengpublic: 38e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng enum Flags { 39e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng kWantsPrefetching = 1, 40e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng kStreamedFromLocalHost = 2, 41e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng kIsCachingDataSource = 4, 42e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng kIsHTTPBasedSource = 8, 43e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng }; 44e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 45e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng static sp<DataSource> CreateFromURI( 46e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const char *uri, 47e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const KeyedVector<String8, String8> *headers = NULL); 48e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 49e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng DataSource() {} 50e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 51e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual status_t initCheck() const = 0; 52e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 53e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual ssize_t readAt(off64_t offset, void *data, size_t size) = 0; 54e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 55e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // Convenience methods: 56e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bool getUInt16(off64_t offset, uint16_t *x); 57e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bool getUInt32(off64_t offset, uint32_t *x); 58e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bool getUInt64(off64_t offset, uint64_t *x); 59e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 60e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // May return ERROR_UNSUPPORTED. 61e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual status_t getSize(off64_t *size); 62e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 63e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual uint32_t flags() { 64e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return 0; 65e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 66e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 67e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual status_t reconnectAtOffset(off64_t offset) { 68e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return ERROR_UNSUPPORTED; 69e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 70e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 71e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng //////////////////////////////////////////////////////////////////////////// 72e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 73e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bool sniff(String8 *mimeType, float *confidence, sp<AMessage> *meta); 74e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 75e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // The sniffer can optionally fill in "meta" with an AMessage containing 76e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // a dictionary of values that helps the corresponding extractor initialize 77e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // its state without duplicating effort already exerted by the sniffer. 78e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng typedef bool (*SnifferFunc)( 79e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng const sp<DataSource> &source, String8 *mimeType, 80e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng float *confidence, sp<AMessage> *meta); 81e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 82e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng static void RegisterSniffer(SnifferFunc func); 83e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng static void RegisterDefaultSniffers(); 84e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 85e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng // for DRM 86e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual sp<DecryptHandle> DrmInitialization(const char *mime = NULL) { 87e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return NULL; 88e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 89e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client) {}; 90e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 91e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual String8 getUri() { 92e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return String8(); 93e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 94e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 95e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual String8 getMIMEType() const; 96e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 97e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengprotected: 98e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng virtual ~DataSource() {} 99e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 100e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengprivate: 101e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng static Mutex gSnifferMutex; 102e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng static List<SnifferFunc> gSniffers; 103e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 104e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng DataSource(const DataSource &); 105e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng DataSource &operator=(const DataSource &); 106e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng}; 107e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 108e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} // namespace android 109e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 110e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#endif // DATA_SOURCE_H_ 111e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng