1/*
2 * Copyright (C) 2013 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//#define LOG_NDEBUG 0
18#define LOG_TAG "MediaHTTP"
19#include <utils/Log.h>
20
21#include <media/stagefright/MediaHTTP.h>
22
23#include <binder/IServiceManager.h>
24#include <media/stagefright/foundation/ADebug.h>
25#include <media/stagefright/foundation/ALooper.h>
26#include <media/stagefright/Utils.h>
27
28#include <media/IMediaHTTPConnection.h>
29
30namespace android {
31
32MediaHTTP::MediaHTTP(const sp<IMediaHTTPConnection> &conn)
33    : mInitCheck((conn != NULL) ? OK : NO_INIT),
34      mHTTPConnection(conn),
35      mCachedSizeValid(false),
36      mCachedSize(0ll),
37      mDrmManagerClient(NULL) {
38}
39
40MediaHTTP::~MediaHTTP() {
41    clearDRMState_l();
42}
43
44status_t MediaHTTP::connect(
45        const char *uri,
46        const KeyedVector<String8, String8> *headers,
47        off64_t /* offset */) {
48    if (mInitCheck != OK) {
49        return mInitCheck;
50    }
51
52    KeyedVector<String8, String8> extHeaders;
53    if (headers != NULL) {
54        extHeaders = *headers;
55    }
56
57    if (extHeaders.indexOfKey(String8("User-Agent")) < 0) {
58        extHeaders.add(String8("User-Agent"), String8(MakeUserAgent().c_str()));
59    }
60
61    bool success = mHTTPConnection->connect(uri, &extHeaders);
62
63    mLastHeaders = extHeaders;
64    mLastURI = uri;
65
66    mCachedSizeValid = false;
67
68    return success ? OK : UNKNOWN_ERROR;
69}
70
71void MediaHTTP::disconnect() {
72    if (mInitCheck != OK) {
73        return;
74    }
75
76    mHTTPConnection->disconnect();
77}
78
79status_t MediaHTTP::initCheck() const {
80    return mInitCheck;
81}
82
83ssize_t MediaHTTP::readAt(off64_t offset, void *data, size_t size) {
84    if (mInitCheck != OK) {
85        return mInitCheck;
86    }
87
88    int64_t startTimeUs = ALooper::GetNowUs();
89
90    size_t numBytesRead = 0;
91    while (numBytesRead < size) {
92        size_t copy = size - numBytesRead;
93
94        if (copy > 64 * 1024) {
95            // limit the buffer sizes transferred across binder boundaries
96            // to avoid spurious transaction failures.
97            copy = 64 * 1024;
98        }
99
100        ssize_t n = mHTTPConnection->readAt(
101                offset + numBytesRead, (uint8_t *)data + numBytesRead, copy);
102
103        if (n < 0) {
104            return n;
105        } else if (n == 0) {
106            break;
107        }
108
109        numBytesRead += n;
110    }
111
112    int64_t delayUs = ALooper::GetNowUs() - startTimeUs;
113
114    addBandwidthMeasurement(numBytesRead, delayUs);
115
116    return numBytesRead;
117}
118
119status_t MediaHTTP::getSize(off64_t *size) {
120    if (mInitCheck != OK) {
121        return mInitCheck;
122    }
123
124    // Caching the returned size so that it stays valid even after a
125    // disconnect. NuCachedSource2 relies on this.
126
127    if (!mCachedSizeValid) {
128        mCachedSize = mHTTPConnection->getSize();
129        mCachedSizeValid = true;
130    }
131
132    *size = mCachedSize;
133
134    return *size < 0 ? *size : static_cast<status_t>(OK);
135}
136
137uint32_t MediaHTTP::flags() {
138    return kWantsPrefetching | kIsHTTPBasedSource;
139}
140
141status_t MediaHTTP::reconnectAtOffset(off64_t offset) {
142    return connect(mLastURI.c_str(), &mLastHeaders, offset);
143}
144
145// DRM...
146
147sp<DecryptHandle> MediaHTTP::DrmInitialization(const char* mime) {
148    if (mDrmManagerClient == NULL) {
149        mDrmManagerClient = new DrmManagerClient();
150    }
151
152    if (mDrmManagerClient == NULL) {
153        return NULL;
154    }
155
156    if (mDecryptHandle == NULL) {
157        mDecryptHandle = mDrmManagerClient->openDecryptSession(
158                String8(mLastURI.c_str()), mime);
159    }
160
161    if (mDecryptHandle == NULL) {
162        delete mDrmManagerClient;
163        mDrmManagerClient = NULL;
164    }
165
166    return mDecryptHandle;
167}
168
169void MediaHTTP::getDrmInfo(
170        sp<DecryptHandle> &handle, DrmManagerClient **client) {
171    handle = mDecryptHandle;
172    *client = mDrmManagerClient;
173}
174
175String8 MediaHTTP::getUri() {
176    if (mInitCheck != OK) {
177        return String8::empty();
178    }
179
180    String8 uri;
181    if (OK == mHTTPConnection->getUri(&uri)) {
182        return uri;
183    }
184    return String8(mLastURI.c_str());
185}
186
187String8 MediaHTTP::getMIMEType() const {
188    if (mInitCheck != OK) {
189        return String8("application/octet-stream");
190    }
191
192    String8 mimeType;
193    status_t err = mHTTPConnection->getMIMEType(&mimeType);
194
195    if (err != OK) {
196        return String8("application/octet-stream");
197    }
198
199    return mimeType;
200}
201
202void MediaHTTP::clearDRMState_l() {
203    if (mDecryptHandle != NULL) {
204        // To release mDecryptHandle
205        CHECK(mDrmManagerClient);
206        mDrmManagerClient->closeDecryptSession(mDecryptHandle);
207        mDecryptHandle = NULL;
208    }
209}
210
211}  // namespace android
212