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      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 
     19 #if CHROMIUM_AVAILABLE
     20 #include "include/DataUriSource.h"
     21 #endif
     22 
     23 #include "include/MP3Extractor.h"
     24 #include "include/MPEG4Extractor.h"
     25 #include "include/WAVExtractor.h"
     26 #include "include/OggExtractor.h"
     27 #include "include/MPEG2PSExtractor.h"
     28 #include "include/MPEG2TSExtractor.h"
     29 #include "include/NuCachedSource2.h"
     30 #include "include/HTTPBase.h"
     31 #include "include/DRMExtractor.h"
     32 #include "include/FLACExtractor.h"
     33 #include "include/AACExtractor.h"
     34 #include "include/WVMExtractor.h"
     35 
     36 #include "matroska/MatroskaExtractor.h"
     37 
     38 #include <media/stagefright/foundation/AMessage.h>
     39 #include <media/stagefright/DataSource.h>
     40 #include <media/stagefright/FileSource.h>
     41 #include <media/stagefright/MediaErrors.h>
     42 #include <utils/String8.h>
     43 
     44 #include <cutils/properties.h>
     45 
     46 namespace android {
     47 
     48 bool DataSource::getUInt16(off64_t offset, uint16_t *x) {
     49     *x = 0;
     50 
     51     uint8_t byte[2];
     52     if (readAt(offset, byte, 2) != 2) {
     53         return false;
     54     }
     55 
     56     *x = (byte[0] << 8) | byte[1];
     57 
     58     return true;
     59 }
     60 
     61 status_t DataSource::getSize(off64_t *size) {
     62     *size = 0;
     63 
     64     return ERROR_UNSUPPORTED;
     65 }
     66 
     67 ////////////////////////////////////////////////////////////////////////////////
     68 
     69 Mutex DataSource::gSnifferMutex;
     70 List<DataSource::SnifferFunc> DataSource::gSniffers;
     71 
     72 bool DataSource::sniff(
     73         String8 *mimeType, float *confidence, sp<AMessage> *meta) {
     74     *mimeType = "";
     75     *confidence = 0.0f;
     76     meta->clear();
     77 
     78     Mutex::Autolock autoLock(gSnifferMutex);
     79     for (List<SnifferFunc>::iterator it = gSniffers.begin();
     80          it != gSniffers.end(); ++it) {
     81         String8 newMimeType;
     82         float newConfidence;
     83         sp<AMessage> newMeta;
     84         if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) {
     85             if (newConfidence > *confidence) {
     86                 *mimeType = newMimeType;
     87                 *confidence = newConfidence;
     88                 *meta = newMeta;
     89             }
     90         }
     91     }
     92 
     93     return *confidence > 0.0;
     94 }
     95 
     96 // static
     97 void DataSource::RegisterSniffer(SnifferFunc func) {
     98     Mutex::Autolock autoLock(gSnifferMutex);
     99 
    100     for (List<SnifferFunc>::iterator it = gSniffers.begin();
    101          it != gSniffers.end(); ++it) {
    102         if (*it == func) {
    103             return;
    104         }
    105     }
    106 
    107     gSniffers.push_back(func);
    108 }
    109 
    110 // static
    111 void DataSource::RegisterDefaultSniffers() {
    112     RegisterSniffer(SniffMPEG4);
    113     RegisterSniffer(SniffMatroska);
    114     RegisterSniffer(SniffOgg);
    115     RegisterSniffer(SniffWAV);
    116     RegisterSniffer(SniffFLAC);
    117     RegisterSniffer(SniffAMR);
    118     RegisterSniffer(SniffMPEG2TS);
    119     RegisterSniffer(SniffMP3);
    120     RegisterSniffer(SniffAAC);
    121     RegisterSniffer(SniffMPEG2PS);
    122     RegisterSniffer(SniffWVM);
    123 
    124     char value[PROPERTY_VALUE_MAX];
    125     if (property_get("drm.service.enabled", value, NULL)
    126             && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
    127         RegisterSniffer(SniffDRM);
    128     }
    129 }
    130 
    131 // static
    132 sp<DataSource> DataSource::CreateFromURI(
    133         const char *uri, const KeyedVector<String8, String8> *headers) {
    134     bool isWidevine = !strncasecmp("widevine://", uri, 11);
    135 
    136     sp<DataSource> source;
    137     if (!strncasecmp("file://", uri, 7)) {
    138         source = new FileSource(uri + 7);
    139     } else if (!strncasecmp("http://", uri, 7)
    140             || !strncasecmp("https://", uri, 8)
    141             || isWidevine) {
    142         sp<HTTPBase> httpSource = HTTPBase::Create();
    143 
    144         String8 tmp;
    145         if (isWidevine) {
    146             tmp = String8("http://");
    147             tmp.append(uri + 11);
    148 
    149             uri = tmp.string();
    150         }
    151 
    152         if (httpSource->connect(uri, headers) != OK) {
    153             return NULL;
    154         }
    155 
    156         if (!isWidevine) {
    157             String8 cacheConfig;
    158             bool disconnectAtHighwatermark;
    159             if (headers != NULL) {
    160                 KeyedVector<String8, String8> copy = *headers;
    161                 NuCachedSource2::RemoveCacheSpecificHeaders(
    162                         &copy, &cacheConfig, &disconnectAtHighwatermark);
    163             }
    164 
    165             source = new NuCachedSource2(
    166                     httpSource,
    167                     cacheConfig.isEmpty() ? NULL : cacheConfig.string());
    168         } else {
    169             // We do not want that prefetching, caching, datasource wrapper
    170             // in the widevine:// case.
    171             source = httpSource;
    172         }
    173 
    174 # if CHROMIUM_AVAILABLE
    175     } else if (!strncasecmp("data:", uri, 5)) {
    176         source = new DataUriSource(uri);
    177 #endif
    178     } else {
    179         // Assume it's a filename.
    180         source = new FileSource(uri);
    181     }
    182 
    183     if (source == NULL || source->initCheck() != OK) {
    184         return NULL;
    185     }
    186 
    187     return source;
    188 }
    189 
    190 String8 DataSource::getMIMEType() const {
    191     return String8("application/octet-stream");
    192 }
    193 
    194 }  // namespace android
    195