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