DataSource.cpp revision 9e9b3f5adf97cc37024d2a1b7aafe9495a432c29 
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/DRMExtractor.h"
23#include "include/FLACExtractor.h"
24#include "include/HTTPBase.h"
25#include "include/MP3Extractor.h"
26#include "include/MPEG2PSExtractor.h"
27#include "include/MPEG2TSExtractor.h"
28#include "include/MPEG4Extractor.h"
29#include "include/NuCachedSource2.h"
30#include "include/OggExtractor.h"
31#include "include/WAVExtractor.h"
32#include "include/WVMExtractor.h"
33
34#include "matroska/MatroskaExtractor.h"
35
36#include <media/IMediaHTTPConnection.h>
37#include <media/IMediaHTTPService.h>
38#include <media/stagefright/foundation/ADebug.h>
39#include <media/stagefright/foundation/AMessage.h>
40#include <media/stagefright/DataSource.h>
41#include <media/stagefright/DataURISource.h>
42#include <media/stagefright/FileSource.h>
43#include <media/stagefright/MediaErrors.h>
44#include <media/stagefright/MediaHTTP.h>
45#include <utils/String8.h>
46
47#include <cutils/properties.h>
48
49namespace android {
50
51bool DataSource::getUInt16(off64_t offset, uint16_t *x) {
52    *x = 0;
53
54    uint8_t byte[2];
55    if (readAt(offset, byte, 2) != 2) {
56        return false;
57    }
58
59    *x = (byte[0] << 8) | byte[1];
60
61    return true;
62}
63
64bool DataSource::getUInt24(off64_t offset, uint32_t *x) {
65    *x = 0;
66
67    uint8_t byte[3];
68    if (readAt(offset, byte, 3) != 3) {
69        return false;
70    }
71
72    *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
73
74    return true;
75}
76
77bool DataSource::getUInt32(off64_t offset, uint32_t *x) {
78    *x = 0;
79
80    uint32_t tmp;
81    if (readAt(offset, &tmp, 4) != 4) {
82        return false;
83    }
84
85    *x = ntohl(tmp);
86
87    return true;
88}
89
90bool DataSource::getUInt64(off64_t offset, uint64_t *x) {
91    *x = 0;
92
93    uint64_t tmp;
94    if (readAt(offset, &tmp, 8) != 8) {
95        return false;
96    }
97
98    *x = ntoh64(tmp);
99
100    return true;
101}
102
103status_t DataSource::getSize(off64_t *size) {
104    *size = 0;
105
106    return ERROR_UNSUPPORTED;
107}
108
109////////////////////////////////////////////////////////////////////////////////
110
111Mutex DataSource::gSnifferMutex;
112List<DataSource::SnifferFunc> DataSource::gSniffers;
113bool DataSource::gSniffersRegistered = false;
114
115bool DataSource::sniff(
116        String8 *mimeType, float *confidence, sp<AMessage> *meta) {
117    *mimeType = "";
118    *confidence = 0.0f;
119    meta->clear();
120
121    {
122        Mutex::Autolock autoLock(gSnifferMutex);
123        if (!gSniffersRegistered) {
124            return false;
125        }
126    }
127
128    for (List<SnifferFunc>::iterator it = gSniffers.begin();
129         it != gSniffers.end(); ++it) {
130        String8 newMimeType;
131        float newConfidence;
132        sp<AMessage> newMeta;
133        if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) {
134            if (newConfidence > *confidence) {
135                *mimeType = newMimeType;
136                *confidence = newConfidence;
137                *meta = newMeta;
138            }
139        }
140    }
141
142    return *confidence > 0.0;
143}
144
145// static
146void DataSource::RegisterSniffer_l(SnifferFunc func) {
147    for (List<SnifferFunc>::iterator it = gSniffers.begin();
148         it != gSniffers.end(); ++it) {
149        if (*it == func) {
150            return;
151        }
152    }
153
154    gSniffers.push_back(func);
155}
156
157// static
158void DataSource::RegisterDefaultSniffers() {
159    Mutex::Autolock autoLock(gSnifferMutex);
160    if (gSniffersRegistered) {
161        return;
162    }
163
164    RegisterSniffer_l(SniffMPEG4);
165    RegisterSniffer_l(SniffMatroska);
166    RegisterSniffer_l(SniffOgg);
167    RegisterSniffer_l(SniffWAV);
168    RegisterSniffer_l(SniffFLAC);
169    RegisterSniffer_l(SniffAMR);
170    RegisterSniffer_l(SniffMPEG2TS);
171    RegisterSniffer_l(SniffMP3);
172    RegisterSniffer_l(SniffAAC);
173    RegisterSniffer_l(SniffMPEG2PS);
174    RegisterSniffer_l(SniffWVM);
175
176    char value[PROPERTY_VALUE_MAX];
177    if (property_get("drm.service.enabled", value, NULL)
178            && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
179        RegisterSniffer_l(SniffDRM);
180    }
181    gSniffersRegistered = true;
182}
183
184// static
185sp<DataSource> DataSource::CreateFromURI(
186        const sp<IMediaHTTPService> &httpService,
187        const char *uri,
188        const KeyedVector<String8, String8> *headers,
189        String8 *contentType,
190        HTTPBase *httpSource) {
191    if (contentType != NULL) {
192        *contentType = "";
193    }
194
195    bool isWidevine = !strncasecmp("widevine://", uri, 11);
196
197    sp<DataSource> source;
198    if (!strncasecmp("file://", uri, 7)) {
199        source = new FileSource(uri + 7);
200    } else if (!strncasecmp("http://", uri, 7)
201            || !strncasecmp("https://", uri, 8)
202            || isWidevine) {
203        if (httpService == NULL) {
204            ALOGE("Invalid http service!");
205            return NULL;
206        }
207
208        if (httpSource == NULL) {
209            sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
210            if (conn == NULL) {
211                ALOGE("Failed to make http connection from http service!");
212                return NULL;
213            }
214            httpSource = new MediaHTTP(conn);
215        }
216
217        String8 tmp;
218        if (isWidevine) {
219            tmp = String8("http://");
220            tmp.append(uri + 11);
221
222            uri = tmp.string();
223        }
224
225        String8 cacheConfig;
226        bool disconnectAtHighwatermark;
227        KeyedVector<String8, String8> nonCacheSpecificHeaders;
228        if (headers != NULL) {
229            nonCacheSpecificHeaders = *headers;
230            NuCachedSource2::RemoveCacheSpecificHeaders(
231                    &nonCacheSpecificHeaders,
232                    &cacheConfig,
233                    &disconnectAtHighwatermark);
234        }
235
236        if (httpSource->connect(uri, &nonCacheSpecificHeaders) != OK) {
237            ALOGE("Failed to connect http source!");
238            return NULL;
239        }
240
241        if (!isWidevine) {
242            if (contentType != NULL) {
243                *contentType = httpSource->getMIMEType();
244            }
245
246            source = new NuCachedSource2(
247                    httpSource,
248                    cacheConfig.isEmpty() ? NULL : cacheConfig.string(),
249                    disconnectAtHighwatermark);
250        } else {
251            // We do not want that prefetching, caching, datasource wrapper
252            // in the widevine:// case.
253            source = httpSource;
254        }
255    } else if (!strncasecmp("data:", uri, 5)) {
256        source = DataURISource::Create(uri);
257    } else {
258        // Assume it's a filename.
259        source = new FileSource(uri);
260    }
261
262    if (source == NULL || source->initCheck() != OK) {
263        return NULL;
264    }
265
266    return source;
267}
268
269sp<DataSource> DataSource::CreateMediaHTTP(const sp<IMediaHTTPService> &httpService) {
270    if (httpService == NULL) {
271        return NULL;
272    }
273
274    sp<IMediaHTTPConnection> conn = httpService->makeHTTPConnection();
275    if (conn == NULL) {
276        return NULL;
277    } else {
278        return new MediaHTTP(conn);
279    }
280}
281
282String8 DataSource::getMIMEType() const {
283    return String8("application/octet-stream");
284}
285
286}  // namespace android
287