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//#define LOG_NDEBUG 0
17#define LOG_TAG "DataSource"
18
19#include "include/AMRExtractor.h"
20
21#include "include/AACExtractor.h"
22#include "include/CallbackDataSource.h"
23#include "include/DRMExtractor.h"
24#include "include/FLACExtractor.h"
25#include "include/HTTPBase.h"
26#include "include/MidiExtractor.h"
27#include "include/MP3Extractor.h"
28#include "include/MPEG2PSExtractor.h"
29#include "include/MPEG2TSExtractor.h"
30#include "include/MPEG4Extractor.h"
31#include "include/NuCachedSource2.h"
32#include "include/OggExtractor.h"
33#include "include/WAVExtractor.h"
34#include "include/WVMExtractor.h"
35
36#include "matroska/MatroskaExtractor.h"
37
38#include <media/IMediaHTTPConnection.h>
39#include <media/IMediaHTTPService.h>
40#include <media/stagefright/foundation/ADebug.h>
41#include <media/stagefright/foundation/AMessage.h>
42#include <media/stagefright/DataSource.h>
43#include <media/stagefright/DataURISource.h>
44#include <media/stagefright/FileSource.h>
45#include <media/stagefright/MediaErrors.h>
46#include <media/stagefright/MediaHTTP.h>
47#include <utils/String8.h>
48
49#include <cutils/properties.h>
50
51#include <private/android_filesystem_config.h>
52
53namespace android {
54
55bool DataSource::getUInt16(off64_t offset, uint16_t *x) {
56    *x = 0;
57
58    uint8_t byte[2];
59    if (readAt(offset, byte, 2) != 2) {
60        return false;
61    }
62
63    *x = (byte[0] << 8) | byte[1];
64
65    return true;
66}
67
68bool DataSource::getUInt24(off64_t offset, uint32_t *x) {
69    *x = 0;
70
71    uint8_t byte[3];
72    if (readAt(offset, byte, 3) != 3) {
73        return false;
74    }
75
76    *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
77
78    return true;
79}
80
81bool DataSource::getUInt32(off64_t offset, uint32_t *x) {
82    *x = 0;
83
84    uint32_t tmp;
85    if (readAt(offset, &tmp, 4) != 4) {
86        return false;
87    }
88
89    *x = ntohl(tmp);
90
91    return true;
92}
93
94bool DataSource::getUInt64(off64_t offset, uint64_t *x) {
95    *x = 0;
96
97    uint64_t tmp;
98    if (readAt(offset, &tmp, 8) != 8) {
99        return false;
100    }
101
102    *x = ntoh64(tmp);
103
104    return true;
105}
106
107status_t DataSource::getSize(off64_t *size) {
108    *size = 0;
109
110    return ERROR_UNSUPPORTED;
111}
112
113////////////////////////////////////////////////////////////////////////////////
114
115Mutex DataSource::gSnifferMutex;
116List<DataSource::SnifferFunc> DataSource::gSniffers;
117bool DataSource::gSniffersRegistered = false;
118
119bool DataSource::sniff(
120        String8 *mimeType, float *confidence, sp<AMessage> *meta) {
121    *mimeType = "";
122    *confidence = 0.0f;
123    meta->clear();
124
125    {
126        Mutex::Autolock autoLock(gSnifferMutex);
127        if (!gSniffersRegistered) {
128            return false;
129        }
130    }
131
132    for (List<SnifferFunc>::iterator it = gSniffers.begin();
133         it != gSniffers.end(); ++it) {
134        String8 newMimeType;
135        float newConfidence;
136        sp<AMessage> newMeta;
137        if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) {
138            if (newConfidence > *confidence) {
139                *mimeType = newMimeType;
140                *confidence = newConfidence;
141                *meta = newMeta;
142            }
143        }
144    }
145
146    return *confidence > 0.0;
147}
148
149// static
150void DataSource::RegisterSniffer_l(SnifferFunc func) {
151    for (List<SnifferFunc>::iterator it = gSniffers.begin();
152         it != gSniffers.end(); ++it) {
153        if (*it == func) {
154            return;
155        }
156    }
157
158    gSniffers.push_back(func);
159}
160
161// static
162void DataSource::RegisterDefaultSniffers() {
163    Mutex::Autolock autoLock(gSnifferMutex);
164    if (gSniffersRegistered) {
165        return;
166    }
167
168    RegisterSniffer_l(SniffMPEG4);
169    RegisterSniffer_l(SniffMatroska);
170    RegisterSniffer_l(SniffOgg);
171    RegisterSniffer_l(SniffWAV);
172    RegisterSniffer_l(SniffFLAC);
173    RegisterSniffer_l(SniffAMR);
174    RegisterSniffer_l(SniffMPEG2TS);
175    RegisterSniffer_l(SniffMP3);
176    RegisterSniffer_l(SniffAAC);
177    RegisterSniffer_l(SniffMPEG2PS);
178    if (getuid() == AID_MEDIA) {
179        // WVM only in the media server process
180        RegisterSniffer_l(SniffWVM);
181    }
182    RegisterSniffer_l(SniffMidi);
183
184    char value[PROPERTY_VALUE_MAX];
185    if (property_get("drm.service.enabled", value, NULL)
186            && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
187        RegisterSniffer_l(SniffDRM);
188    }
189    gSniffersRegistered = true;
190}
191
192// static
193sp<DataSource> DataSource::CreateFromURI(
194        const sp<IMediaHTTPService> &httpService,
195        const char *uri,
196        const KeyedVector<String8, String8> *headers,
197        String8 *contentType,
198        HTTPBase *httpSource) {
199    if (contentType != NULL) {
200        *contentType = "";
201    }
202
203    bool isWidevine = !strncasecmp("widevine://", uri, 11);
204
205    sp<DataSource> source;
206    if (!strncasecmp("file://", uri, 7)) {
207        source = new FileSource(uri + 7);
208    } else if (!strncasecmp("http://", uri, 7)
209            || !strncasecmp("https://", uri, 8)
210            || isWidevine) {
211        if (httpService == NULL) {
212            ALOGE("Invalid http service!");
213            return NULL;
214        }
215
216        if (httpSource == NULL) {
217            sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
218            if (conn == NULL) {
219                ALOGE("Failed to make http connection from http service!");
220                return NULL;
221            }
222            httpSource = new MediaHTTP(conn);
223        }
224
225        String8 tmp;
226        if (isWidevine) {
227            tmp = String8("http://");
228            tmp.append(uri + 11);
229
230            uri = tmp.string();
231        }
232
233        String8 cacheConfig;
234        bool disconnectAtHighwatermark;
235        KeyedVector<String8, String8> nonCacheSpecificHeaders;
236        if (headers != NULL) {
237            nonCacheSpecificHeaders = *headers;
238            NuCachedSource2::RemoveCacheSpecificHeaders(
239                    &nonCacheSpecificHeaders,
240                    &cacheConfig,
241                    &disconnectAtHighwatermark);
242        }
243
244        if (httpSource->connect(uri, &nonCacheSpecificHeaders) != OK) {
245            ALOGE("Failed to connect http source!");
246            return NULL;
247        }
248
249        if (!isWidevine) {
250            if (contentType != NULL) {
251                *contentType = httpSource->getMIMEType();
252            }
253
254            source = NuCachedSource2::Create(
255                    httpSource,
256                    cacheConfig.isEmpty() ? NULL : cacheConfig.string(),
257                    disconnectAtHighwatermark);
258        } else {
259            // We do not want that prefetching, caching, datasource wrapper
260            // in the widevine:// case.
261            source = httpSource;
262        }
263    } else if (!strncasecmp("data:", uri, 5)) {
264        source = DataURISource::Create(uri);
265    } else {
266        // Assume it's a filename.
267        source = new FileSource(uri);
268    }
269
270    if (source == NULL || source->initCheck() != OK) {
271        return NULL;
272    }
273
274    return source;
275}
276
277sp<DataSource> DataSource::CreateMediaHTTP(const sp<IMediaHTTPService> &httpService) {
278    if (httpService == NULL) {
279        return NULL;
280    }
281
282    sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
283    if (conn == NULL) {
284        return NULL;
285    } else {
286        return new MediaHTTP(conn);
287    }
288}
289
290sp<DataSource> DataSource::CreateFromIDataSource(const sp<IDataSource> &source) {
291    return new TinyCacheSource(new CallbackDataSource(source));
292}
293
294String8 DataSource::getMIMEType() const {
295    return String8("application/octet-stream");
296}
297
298}  // namespace android
299