SDPLoader.cpp revision a8b8488f703bb6bda039d7d98f87e4f9d845664d 
1/*
2 * Copyright (C) 2012 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 "SDPLoader"
19#include <utils/Log.h>
20
21#include "SDPLoader.h"
22
23#include "ASessionDescription.h"
24#include "HTTPBase.h"
25
26#include <media/stagefright/foundation/ABuffer.h>
27#include <media/stagefright/foundation/ADebug.h>
28
29#define DEFAULT_SDP_SIZE 100000
30
31namespace android {
32
33SDPLoader::SDPLoader(const sp<AMessage> &notify, uint32_t flags, bool uidValid, uid_t uid)
34    : mNotify(notify),
35      mFlags(flags),
36      mUIDValid(uidValid),
37      mUID(uid),
38      mNetLooper(new ALooper),
39      mCancelled(false),
40      mHTTPDataSource(
41              HTTPBase::Create(
42                  (mFlags & kFlagIncognito)
43                    ? HTTPBase::kFlagIncognito
44                    : 0)) {
45    if (mUIDValid) {
46        mHTTPDataSource->setUID(mUID);
47    }
48
49    mNetLooper->setName("sdp net");
50    mNetLooper->start(false /* runOnCallingThread */,
51                      false /* canCallJava */,
52                      PRIORITY_HIGHEST);
53}
54
55void SDPLoader::load(const char *url, const KeyedVector<String8, String8> *headers) {
56    mNetLooper->registerHandler(this);
57
58    sp<AMessage> msg = new AMessage(kWhatLoad, id());
59    msg->setString("url", url);
60
61    if (headers != NULL) {
62        msg->setPointer(
63                "headers",
64                new KeyedVector<String8, String8>(*headers));
65    }
66
67    msg->post();
68}
69
70void SDPLoader::cancel() {
71    mCancelled = true;
72    sp<HTTPBase> HTTPDataSource = mHTTPDataSource;
73    HTTPDataSource->disconnect();
74}
75
76void SDPLoader::onMessageReceived(const sp<AMessage> &msg) {
77    switch (msg->what()) {
78        case kWhatLoad:
79            onLoad(msg);
80            break;
81
82        default:
83            TRESPASS();
84            break;
85    }
86}
87
88void SDPLoader::onLoad(const sp<AMessage> &msg) {
89    status_t err = OK;
90    sp<ASessionDescription> desc = NULL;
91    AString url;
92    CHECK(msg->findString("url", &url));
93
94    KeyedVector<String8, String8> *headers = NULL;
95    msg->findPointer("headers", (void **)&headers);
96
97    if (!(mFlags & kFlagIncognito)) {
98        ALOGV("onLoad '%s'", url.c_str());
99    } else {
100        ALOGI("onLoad <URL suppressed>");
101    }
102
103    if (!mCancelled) {
104        err = mHTTPDataSource->connect(url.c_str(), headers);
105
106        if (err != OK) {
107            ALOGE("connect() returned %d", err);
108        }
109    }
110
111    if (headers != NULL) {
112        delete headers;
113        headers = NULL;
114    }
115
116    off64_t sdpSize;
117    if (err == OK && !mCancelled) {
118        err = mHTTPDataSource->getSize(&sdpSize);
119
120        if (err != OK) {
121            //We did not get the size of the sdp file, default to a large value
122            sdpSize = DEFAULT_SDP_SIZE;
123            err = OK;
124        }
125    }
126
127    sp<ABuffer> buffer = new ABuffer(sdpSize);
128
129    if (err == OK && !mCancelled) {
130        ssize_t readSize = mHTTPDataSource->readAt(0, buffer->data(), sdpSize);
131
132        if (readSize < 0) {
133            ALOGE("Failed to read SDP, error code = %ld", readSize);
134            err = UNKNOWN_ERROR;
135        } else {
136            desc = new ASessionDescription;
137
138            if (desc == NULL || !desc->setTo(buffer->data(), (size_t)readSize)) {
139                err = UNKNOWN_ERROR;
140                ALOGE("Failed to parse SDP");
141            }
142        }
143    }
144
145    mHTTPDataSource.clear();
146
147    sp<AMessage> notify = mNotify->dup();
148    notify->setInt32("what", kWhatSDPLoaded);
149    notify->setInt32("result", err);
150    notify->setObject("description", desc);
151    notify->post();
152}
153
154}  // namespace android
155