DataSource.cpp revision 50c44c79d2d7dd6cd1485d9d939f67f80b8da1ca
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 17#include "include/AMRExtractor.h" 18#include "include/MP3Extractor.h" 19#include "include/MPEG4Extractor.h" 20#include "include/WAVExtractor.h" 21#include "include/OggExtractor.h" 22#include "include/MPEG2TSExtractor.h" 23#include "include/NuCachedSource2.h" 24#include "include/NuHTTPDataSource.h" 25#include "include/DRMExtractor.h" 26#include "include/FLACExtractor.h" 27#include "include/AACExtractor.h" 28 29#include "matroska/MatroskaExtractor.h" 30 31#include <media/stagefright/foundation/AMessage.h> 32#include <media/stagefright/DataSource.h> 33#include <media/stagefright/FileSource.h> 34#include <media/stagefright/MediaErrors.h> 35#include <utils/String8.h> 36 37#include <cutils/properties.h> 38 39namespace android { 40 41bool DataSource::getUInt16(off64_t offset, uint16_t *x) { 42 *x = 0; 43 44 uint8_t byte[2]; 45 if (readAt(offset, byte, 2) != 2) { 46 return false; 47 } 48 49 *x = (byte[0] << 8) | byte[1]; 50 51 return true; 52} 53 54status_t DataSource::getSize(off64_t *size) { 55 *size = 0; 56 57 return ERROR_UNSUPPORTED; 58} 59 60//////////////////////////////////////////////////////////////////////////////// 61 62Mutex DataSource::gSnifferMutex; 63List<DataSource::SnifferFunc> DataSource::gSniffers; 64 65bool DataSource::sniff( 66 String8 *mimeType, float *confidence, sp<AMessage> *meta) { 67 *mimeType = ""; 68 *confidence = 0.0f; 69 meta->clear(); 70 71 Mutex::Autolock autoLock(gSnifferMutex); 72 for (List<SnifferFunc>::iterator it = gSniffers.begin(); 73 it != gSniffers.end(); ++it) { 74 String8 newMimeType; 75 float newConfidence; 76 sp<AMessage> newMeta; 77 if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) { 78 if (newConfidence > *confidence) { 79 *mimeType = newMimeType; 80 *confidence = newConfidence; 81 *meta = newMeta; 82 } 83 } 84 } 85 86 return *confidence > 0.0; 87} 88 89// static 90void DataSource::RegisterSniffer(SnifferFunc func) { 91 Mutex::Autolock autoLock(gSnifferMutex); 92 93 for (List<SnifferFunc>::iterator it = gSniffers.begin(); 94 it != gSniffers.end(); ++it) { 95 if (*it == func) { 96 return; 97 } 98 } 99 100 gSniffers.push_back(func); 101} 102 103// static 104void DataSource::RegisterDefaultSniffers() { 105 RegisterSniffer(SniffMPEG4); 106 RegisterSniffer(SniffMatroska); 107 RegisterSniffer(SniffOgg); 108 RegisterSniffer(SniffWAV); 109 RegisterSniffer(SniffFLAC); 110 RegisterSniffer(SniffAMR); 111 RegisterSniffer(SniffMPEG2TS); 112 RegisterSniffer(SniffMP3); 113 RegisterSniffer(SniffAAC); 114 115 char value[PROPERTY_VALUE_MAX]; 116 if (property_get("drm.service.enabled", value, NULL) 117 && (!strcmp(value, "1") || !strcasecmp(value, "true"))) { 118 RegisterSniffer(SniffDRM); 119 } 120} 121 122// static 123sp<DataSource> DataSource::CreateFromURI( 124 const char *uri, const KeyedVector<String8, String8> *headers) { 125 sp<DataSource> source; 126 if (!strncasecmp("file://", uri, 7)) { 127 source = new FileSource(uri + 7); 128 } else if (!strncasecmp("http://", uri, 7)) { 129 sp<NuHTTPDataSource> httpSource = new NuHTTPDataSource; 130 if (httpSource->connect(uri, headers) != OK) { 131 return NULL; 132 } 133 source = new NuCachedSource2(httpSource); 134 } else { 135 // Assume it's a filename. 136 source = new FileSource(uri); 137 } 138 139 if (source == NULL || source->initCheck() != OK) { 140 return NULL; 141 } 142 143 return source; 144} 145 146} // namespace android 147