SDPLoader.cpp revision b4a7a2df4c28c3f32b5d877b54831d2cc5d78f81 
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
31#define DEFAULT_SDP_SIZE 100000
32
33namespace android {
34
35SDPLoader::SDPLoader(
36        const sp<AMessage> &notify,
37        uint32_t flags,
38        const sp<IMediaHTTPService> &httpService)
39    : mNotify(notify),
40      mFlags(flags),
41      mNetLooper(new ALooper),
42      mCancelled(false),
43      mHTTPDataSource(new MediaHTTP(httpService->makeHTTPConnection())) {
44    mNetLooper->setName("sdp net");
45    mNetLooper->start(false /* runOnCallingThread */,
46                      false /* canCallJava */,
47                      PRIORITY_HIGHEST);
48}
49
50void SDPLoader::load(const char *url, const KeyedVector<String8, String8> *headers) {
51    mNetLooper->registerHandler(this);
52
53    sp<AMessage> msg = new AMessage(kWhatLoad, id());
54    msg->setString("url", url);
55
56    if (headers != NULL) {
57        msg->setPointer(
58                "headers",
59                new KeyedVector<String8, String8>(*headers));
60    }
61
62    msg->post();
63}
64
65void SDPLoader::cancel() {
66    mCancelled = true;
67    sp<HTTPBase> HTTPDataSource = mHTTPDataSource;
68    HTTPDataSource->disconnect();
69}
70
71void SDPLoader::onMessageReceived(const sp<AMessage> &msg) {
72    switch (msg->what()) {
73        case kWhatLoad:
74            onLoad(msg);
75            break;
76
77        default:
78            TRESPASS();
79            break;
80    }
81}
82
83void SDPLoader::onLoad(const sp<AMessage> &msg) {
84    status_t err = OK;
85    sp<ASessionDescription> desc = NULL;
86    AString url;
87    CHECK(msg->findString("url", &url));
88
89    KeyedVector<String8, String8> *headers = NULL;
90    msg->findPointer("headers", (void **)&headers);
91
92    if (!(mFlags & kFlagIncognito)) {
93        ALOGV("onLoad '%s'", url.c_str());
94    } else {
95        ALOGI("onLoad <URL suppressed>");
96    }
97
98    if (!mCancelled) {
99        err = mHTTPDataSource->connect(url.c_str(), headers);
100
101        if (err != OK) {
102            ALOGE("connect() returned %d", err);
103        }
104    }
105
106    if (headers != NULL) {
107        delete headers;
108        headers = NULL;
109    }
110
111    off64_t sdpSize;
112    if (err == OK && !mCancelled) {
113        err = mHTTPDataSource->getSize(&sdpSize);
114
115        if (err != OK) {
116            //We did not get the size of the sdp file, default to a large value
117            sdpSize = DEFAULT_SDP_SIZE;
118            err = OK;
119        }
120    }
121
122    sp<ABuffer> buffer = new ABuffer(sdpSize);
123
124    if (err == OK && !mCancelled) {
125        ssize_t readSize = mHTTPDataSource->readAt(0, buffer->data(), sdpSize);
126
127        if (readSize < 0) {
128            ALOGE("Failed to read SDP, error code = %zu", readSize);
129            err = UNKNOWN_ERROR;
130        } else {
131            desc = new ASessionDescription;
132
133            if (desc == NULL || !desc->setTo(buffer->data(), (size_t)readSize)) {
134                err = UNKNOWN_ERROR;
135                ALOGE("Failed to parse SDP");
136            }
137        }
138    }
139
140    mHTTPDataSource.clear();
141
142    sp<AMessage> notify = mNotify->dup();
143    notify->setInt32("what", kWhatSDPLoaded);
144    notify->setInt32("result", err);
145    notify->setObject("description", desc);
146    notify->post();
147}
148
149}  // namespace android
150