DataSource.cpp revision 99f31604136d66ae10e20669fb6b5716f342bde0 
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
51namespace android {
52
53bool DataSource::getUInt16(off64_t offset, uint16_t *x) {
54    *x = 0;
55
56    uint8_t byte[2];
57    if (readAt(offset, byte, 2) != 2) {
58        return false;
59    }
60
61    *x = (byte[0] << 8) | byte[1];
62
63    return true;
64}
65
66bool DataSource::getUInt24(off64_t offset, uint32_t *x) {
67    *x = 0;
68
69    uint8_t byte[3];
70    if (readAt(offset, byte, 3) != 3) {
71        return false;
72    }
73
74    *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
75
76    return true;
77}
78
79bool DataSource::getUInt32(off64_t offset, uint32_t *x) {
80    *x = 0;
81
82    uint32_t tmp;
83    if (readAt(offset, &tmp, 4) != 4) {
84        return false;
85    }
86
87    *x = ntohl(tmp);
88
89    return true;
90}
91
92bool DataSource::getUInt64(off64_t offset, uint64_t *x) {
93    *x = 0;
94
95    uint64_t tmp;
96    if (readAt(offset, &tmp, 8) != 8) {
97        return false;
98    }
99
100    *x = ntoh64(tmp);
101
102    return true;
103}
104
105status_t DataSource::getSize(off64_t *size) {
106    *size = 0;
107
108    return ERROR_UNSUPPORTED;
109}
110
111////////////////////////////////////////////////////////////////////////////////
112
113Mutex DataSource::gSnifferMutex;
114List<DataSource::SnifferFunc> DataSource::gSniffers;
115bool DataSource::gSniffersRegistered = false;
116
117bool DataSource::sniff(
118        String8 *mimeType, float *confidence, sp<AMessage> *meta) {
119    *mimeType = "";
120    *confidence = 0.0f;
121    meta->clear();
122
123    {
124        Mutex::Autolock autoLock(gSnifferMutex);
125        if (!gSniffersRegistered) {
126            return false;
127        }
128    }
129
130    for (List<SnifferFunc>::iterator it = gSniffers.begin();
131         it != gSniffers.end(); ++it) {
132        String8 newMimeType;
133        float newConfidence;
134        sp<AMessage> newMeta;
135        if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) {
136            if (newConfidence > *confidence) {
137                *mimeType = newMimeType;
138                *confidence = newConfidence;
139                *meta = newMeta;
140            }
141        }
142    }
143
144    return *confidence > 0.0;
145}
146
147// static
148void DataSource::RegisterSniffer_l(SnifferFunc func) {
149    for (List<SnifferFunc>::iterator it = gSniffers.begin();
150         it != gSniffers.end(); ++it) {
151        if (*it == func) {
152            return;
153        }
154    }
155
156    gSniffers.push_back(func);
157}
158
159// static
160void DataSource::RegisterDefaultSniffers() {
161    Mutex::Autolock autoLock(gSnifferMutex);
162    if (gSniffersRegistered) {
163        return;
164    }
165
166    RegisterSniffer_l(SniffMPEG4);
167    RegisterSniffer_l(SniffMatroska);
168    RegisterSniffer_l(SniffOgg);
169    RegisterSniffer_l(SniffWAV);
170    RegisterSniffer_l(SniffFLAC);
171    RegisterSniffer_l(SniffAMR);
172    RegisterSniffer_l(SniffMPEG2TS);
173    RegisterSniffer_l(SniffMP3);
174    RegisterSniffer_l(SniffAAC);
175    RegisterSniffer_l(SniffMPEG2PS);
176    RegisterSniffer_l(SniffWVM);
177    RegisterSniffer_l(SniffMidi);
178
179    char value[PROPERTY_VALUE_MAX];
180    if (property_get("drm.service.enabled", value, NULL)
181            && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
182        RegisterSniffer_l(SniffDRM);
183    }
184    gSniffersRegistered = true;
185}
186
187// static
188sp<DataSource> DataSource::CreateFromURI(
189        const sp<IMediaHTTPService> &httpService,
190        const char *uri,
191        const KeyedVector<String8, String8> *headers,
192        String8 *contentType,
193        HTTPBase *httpSource) {
194    if (contentType != NULL) {
195        *contentType = "";
196    }
197
198    bool isWidevine = !strncasecmp("widevine://", uri, 11);
199
200    sp<DataSource> source;
201    if (!strncasecmp("file://", uri, 7)) {
202        source = new FileSource(uri + 7);
203    } else if (!strncasecmp("http://", uri, 7)
204            || !strncasecmp("https://", uri, 8)
205            || isWidevine) {
206        if (httpService == NULL) {
207            ALOGE("Invalid http service!");
208            return NULL;
209        }
210
211        if (httpSource == NULL) {
212            sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
213            if (conn == NULL) {
214                ALOGE("Failed to make http connection from http service!");
215                return NULL;
216            }
217            httpSource = new MediaHTTP(conn);
218        }
219
220        String8 tmp;
221        if (isWidevine) {
222            tmp = String8("http://");
223            tmp.append(uri + 11);
224
225            uri = tmp.string();
226        }
227
228        String8 cacheConfig;
229        bool disconnectAtHighwatermark;
230        KeyedVector<String8, String8> nonCacheSpecificHeaders;
231        if (headers != NULL) {
232            nonCacheSpecificHeaders = *headers;
233            NuCachedSource2::RemoveCacheSpecificHeaders(
234                    &nonCacheSpecificHeaders,
235                    &cacheConfig,
236                    &disconnectAtHighwatermark);
237        }
238
239        if (httpSource->connect(uri, &nonCacheSpecificHeaders) != OK) {
240            ALOGE("Failed to connect http source!");
241            return NULL;
242        }
243
244        if (!isWidevine) {
245            if (contentType != NULL) {
246                *contentType = httpSource->getMIMEType();
247            }
248
249            source = new NuCachedSource2(
250                    httpSource,
251                    cacheConfig.isEmpty() ? NULL : cacheConfig.string(),
252                    disconnectAtHighwatermark);
253        } else {
254            // We do not want that prefetching, caching, datasource wrapper
255            // in the widevine:// case.
256            source = httpSource;
257        }
258    } else if (!strncasecmp("data:", uri, 5)) {
259        source = DataURISource::Create(uri);
260    } else {
261        // Assume it's a filename.
262        source = new FileSource(uri);
263    }
264
265    if (source == NULL || source->initCheck() != OK) {
266        return NULL;
267    }
268
269    return source;
270}
271
272sp<DataSource> DataSource::CreateMediaHTTP(const sp<IMediaHTTPService> &httpService) {
273    if (httpService == NULL) {
274        return NULL;
275    }
276
277    sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
278    if (conn == NULL) {
279        return NULL;
280    } else {
281        return new MediaHTTP(conn);
282    }
283}
284
285sp<DataSource> DataSource::CreateFromIDataSource(const sp<IDataSource> &source) {
286    return new CallbackDataSource(source);
287}
288
289String8 DataSource::getMIMEType() const {
290    return String8("application/octet-stream");
291}
292
293}  // namespace android
294