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/chromium_http_stub.h"
21#endif
22
23#include "include/AACExtractor.h"
24#include "include/DRMExtractor.h"
25#include "include/FLACExtractor.h"
26#include "include/HTTPBase.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/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
46namespace android {
47
48bool 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
61bool DataSource::getUInt24(off64_t offset, uint32_t *x) {
62    *x = 0;
63
64    uint8_t byte[3];
65    if (readAt(offset, byte, 3) != 3) {
66        return false;
67    }
68
69    *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
70
71    return true;
72}
73
74bool DataSource::getUInt32(off64_t offset, uint32_t *x) {
75    *x = 0;
76
77    uint32_t tmp;
78    if (readAt(offset, &tmp, 4) != 4) {
79        return false;
80    }
81
82    *x = ntohl(tmp);
83
84    return true;
85}
86
87bool DataSource::getUInt64(off64_t offset, uint64_t *x) {
88    *x = 0;
89
90    uint64_t tmp;
91    if (readAt(offset, &tmp, 8) != 8) {
92        return false;
93    }
94
95    *x = ntoh64(tmp);
96
97    return true;
98}
99
100status_t DataSource::getSize(off64_t *size) {
101    *size = 0;
102
103    return ERROR_UNSUPPORTED;
104}
105
106////////////////////////////////////////////////////////////////////////////////
107
108Mutex DataSource::gSnifferMutex;
109List<DataSource::SnifferFunc> DataSource::gSniffers;
110
111bool DataSource::sniff(
112        String8 *mimeType, float *confidence, sp<AMessage> *meta) {
113    *mimeType = "";
114    *confidence = 0.0f;
115    meta->clear();
116
117    Mutex::Autolock autoLock(gSnifferMutex);
118    for (List<SnifferFunc>::iterator it = gSniffers.begin();
119         it != gSniffers.end(); ++it) {
120        String8 newMimeType;
121        float newConfidence;
122        sp<AMessage> newMeta;
123        if ((*it)(this, &newMimeType, &newConfidence, &newMeta)) {
124            if (newConfidence > *confidence) {
125                *mimeType = newMimeType;
126                *confidence = newConfidence;
127                *meta = newMeta;
128            }
129        }
130    }
131
132    return *confidence > 0.0;
133}
134
135// static
136void DataSource::RegisterSniffer(SnifferFunc func) {
137    Mutex::Autolock autoLock(gSnifferMutex);
138
139    for (List<SnifferFunc>::iterator it = gSniffers.begin();
140         it != gSniffers.end(); ++it) {
141        if (*it == func) {
142            return;
143        }
144    }
145
146    gSniffers.push_back(func);
147}
148
149// static
150void DataSource::RegisterDefaultSniffers() {
151    RegisterSniffer(SniffMPEG4);
152    RegisterSniffer(SniffMatroska);
153    RegisterSniffer(SniffOgg);
154    RegisterSniffer(SniffWAV);
155    RegisterSniffer(SniffFLAC);
156    RegisterSniffer(SniffAMR);
157    RegisterSniffer(SniffMPEG2TS);
158    RegisterSniffer(SniffMP3);
159    RegisterSniffer(SniffAAC);
160    RegisterSniffer(SniffMPEG2PS);
161    RegisterSniffer(SniffWVM);
162
163    char value[PROPERTY_VALUE_MAX];
164    if (property_get("drm.service.enabled", value, NULL)
165            && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
166        RegisterSniffer(SniffDRM);
167    }
168}
169
170// static
171sp<DataSource> DataSource::CreateFromURI(
172        const char *uri, const KeyedVector<String8, String8> *headers) {
173    bool isWidevine = !strncasecmp("widevine://", uri, 11);
174
175    sp<DataSource> source;
176    if (!strncasecmp("file://", uri, 7)) {
177        source = new FileSource(uri + 7);
178    } else if (!strncasecmp("http://", uri, 7)
179            || !strncasecmp("https://", uri, 8)
180            || isWidevine) {
181        sp<HTTPBase> httpSource = HTTPBase::Create();
182
183        String8 tmp;
184        if (isWidevine) {
185            tmp = String8("http://");
186            tmp.append(uri + 11);
187
188            uri = tmp.string();
189        }
190
191        if (httpSource->connect(uri, headers) != OK) {
192            return NULL;
193        }
194
195        if (!isWidevine) {
196            String8 cacheConfig;
197            bool disconnectAtHighwatermark;
198            if (headers != NULL) {
199                KeyedVector<String8, String8> copy = *headers;
200                NuCachedSource2::RemoveCacheSpecificHeaders(
201                        &copy, &cacheConfig, &disconnectAtHighwatermark);
202            }
203
204            source = new NuCachedSource2(
205                    httpSource,
206                    cacheConfig.isEmpty() ? NULL : cacheConfig.string());
207        } else {
208            // We do not want that prefetching, caching, datasource wrapper
209            // in the widevine:// case.
210            source = httpSource;
211        }
212
213# if CHROMIUM_AVAILABLE
214    } else if (!strncasecmp("data:", uri, 5)) {
215        source = createDataUriSource(uri);
216#endif
217    } else {
218        // Assume it's a filename.
219        source = new FileSource(uri);
220    }
221
222    if (source == NULL || source->initCheck() != OK) {
223        return NULL;
224    }
225
226    return source;
227}
228
229String8 DataSource::getMIMEType() const {
230    return String8("application/octet-stream");
231}
232
233}  // namespace android
234