HTTPLiveSource.cpp revision 1098d87e56f726184ae9c8fe903ea4743669f35b 
1/*
2 * Copyright (C) 2010 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 "HTTPLiveSource"
19#include <utils/Log.h>
20
21#include "HTTPLiveSource.h"
22
23#include "AnotherPacketSource.h"
24#include "LiveDataSource.h"
25#include "LiveSession.h"
26
27#include <media/IMediaHTTPService.h>
28#include <media/stagefright/foundation/ABuffer.h>
29#include <media/stagefright/foundation/ADebug.h>
30#include <media/stagefright/foundation/AMessage.h>
31#include <media/stagefright/MediaErrors.h>
32#include <media/stagefright/MetaData.h>
33
34namespace android {
35
36NuPlayer::HTTPLiveSource::HTTPLiveSource(
37        const sp<AMessage> &notify,
38        const sp<IMediaHTTPService> &httpService,
39        const char *url,
40        const KeyedVector<String8, String8> *headers)
41    : Source(notify),
42      mHTTPService(httpService),
43      mURL(url),
44      mFlags(0),
45      mFinalResult(OK),
46      mOffset(0),
47      mFetchSubtitleDataGeneration(0) {
48    if (headers) {
49        mExtraHeaders = *headers;
50
51        ssize_t index =
52            mExtraHeaders.indexOfKey(String8("x-hide-urls-from-log"));
53
54        if (index >= 0) {
55            mFlags |= kFlagIncognito;
56
57            mExtraHeaders.removeItemsAt(index);
58        }
59    }
60}
61
62NuPlayer::HTTPLiveSource::~HTTPLiveSource() {
63    if (mLiveSession != NULL) {
64        mLiveSession->disconnect();
65
66        mLiveLooper->unregisterHandler(mLiveSession->id());
67        mLiveLooper->unregisterHandler(id());
68        mLiveLooper->stop();
69
70        mLiveSession.clear();
71        mLiveLooper.clear();
72    }
73}
74
75void NuPlayer::HTTPLiveSource::prepareAsync() {
76    if (mLiveLooper == NULL) {
77        mLiveLooper = new ALooper;
78        mLiveLooper->setName("http live");
79        mLiveLooper->start();
80
81        mLiveLooper->registerHandler(this);
82    }
83
84    sp<AMessage> notify = new AMessage(kWhatSessionNotify, id());
85
86    mLiveSession = new LiveSession(
87            notify,
88            (mFlags & kFlagIncognito) ? LiveSession::kFlagIncognito : 0,
89            mHTTPService);
90
91    mLiveLooper->registerHandler(mLiveSession);
92
93    mLiveSession->connectAsync(
94            mURL.c_str(), mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders);
95}
96
97void NuPlayer::HTTPLiveSource::start() {
98}
99
100sp<AMessage> NuPlayer::HTTPLiveSource::getFormat(bool audio) {
101    if (mLiveSession == NULL) {
102        return NULL;
103    }
104
105    sp<AMessage> format;
106    status_t err = mLiveSession->getStreamFormat(
107            audio ? LiveSession::STREAMTYPE_AUDIO
108                  : LiveSession::STREAMTYPE_VIDEO,
109            &format);
110
111    if (err != OK) {
112        return NULL;
113    }
114
115    return format;
116}
117
118status_t NuPlayer::HTTPLiveSource::feedMoreTSData() {
119    return OK;
120}
121
122status_t NuPlayer::HTTPLiveSource::dequeueAccessUnit(
123        bool audio, sp<ABuffer> *accessUnit) {
124    return mLiveSession->dequeueAccessUnit(
125            audio ? LiveSession::STREAMTYPE_AUDIO
126                  : LiveSession::STREAMTYPE_VIDEO,
127            accessUnit);
128}
129
130status_t NuPlayer::HTTPLiveSource::getDuration(int64_t *durationUs) {
131    return mLiveSession->getDuration(durationUs);
132}
133
134size_t NuPlayer::HTTPLiveSource::getTrackCount() const {
135    return mLiveSession->getTrackCount();
136}
137
138sp<AMessage> NuPlayer::HTTPLiveSource::getTrackInfo(size_t trackIndex) const {
139    return mLiveSession->getTrackInfo(trackIndex);
140}
141
142status_t NuPlayer::HTTPLiveSource::selectTrack(size_t trackIndex, bool select) {
143    status_t err = mLiveSession->selectTrack(trackIndex, select);
144
145    if (err == OK) {
146        mFetchSubtitleDataGeneration++;
147        if (select) {
148            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
149            msg->setInt32("generation", mFetchSubtitleDataGeneration);
150            msg->post();
151        }
152    }
153
154    // LiveSession::selectTrack returns BAD_VALUE when selecting the currently
155    // selected track, or unselecting a non-selected track. In this case it's an
156    // no-op so we return OK.
157    return (err == OK || err == BAD_VALUE) ? (status_t)OK : err;
158}
159
160status_t NuPlayer::HTTPLiveSource::seekTo(int64_t seekTimeUs) {
161    return mLiveSession->seekTo(seekTimeUs);
162}
163
164void NuPlayer::HTTPLiveSource::onMessageReceived(const sp<AMessage> &msg) {
165    switch (msg->what()) {
166        case kWhatSessionNotify:
167        {
168            onSessionNotify(msg);
169            break;
170        }
171
172        case kWhatFetchSubtitleData:
173        {
174            int32_t generation;
175            CHECK(msg->findInt32("generation", &generation));
176
177            if (generation != mFetchSubtitleDataGeneration) {
178                // stale
179                break;
180            }
181
182            sp<ABuffer> buffer;
183            if (mLiveSession->dequeueAccessUnit(
184                    LiveSession::STREAMTYPE_SUBTITLES, &buffer) == OK) {
185                sp<AMessage> notify = dupNotify();
186                notify->setInt32("what", kWhatSubtitleData);
187                notify->setBuffer("buffer", buffer);
188                notify->post();
189
190                int64_t timeUs, baseUs, durationUs, delayUs;
191                CHECK(buffer->meta()->findInt64("baseUs", &baseUs));
192                CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
193                CHECK(buffer->meta()->findInt64("durationUs", &durationUs));
194                delayUs = baseUs + timeUs - ALooper::GetNowUs();
195
196                msg->post(delayUs > 0ll ? delayUs : 0ll);
197            } else {
198                // try again in 1 second
199                msg->post(1000000ll);
200            }
201
202            break;
203        }
204
205        default:
206            Source::onMessageReceived(msg);
207            break;
208    }
209}
210
211void NuPlayer::HTTPLiveSource::onSessionNotify(const sp<AMessage> &msg) {
212    int32_t what;
213    CHECK(msg->findInt32("what", &what));
214
215    switch (what) {
216        case LiveSession::kWhatPrepared:
217        {
218            // notify the current size here if we have it, otherwise report an initial size of (0,0)
219            sp<AMessage> format = getFormat(false /* audio */);
220            int32_t width;
221            int32_t height;
222            if (format != NULL &&
223                    format->findInt32("width", &width) && format->findInt32("height", &height)) {
224                notifyVideoSizeChanged(format);
225            } else {
226                notifyVideoSizeChanged();
227            }
228
229            uint32_t flags = FLAG_CAN_PAUSE;
230            if (mLiveSession->isSeekable()) {
231                flags |= FLAG_CAN_SEEK;
232                flags |= FLAG_CAN_SEEK_BACKWARD;
233                flags |= FLAG_CAN_SEEK_FORWARD;
234            }
235
236            if (mLiveSession->hasDynamicDuration()) {
237                flags |= FLAG_DYNAMIC_DURATION;
238            }
239
240            notifyFlagsChanged(flags);
241
242            notifyPrepared();
243            break;
244        }
245
246        case LiveSession::kWhatPreparationFailed:
247        {
248            status_t err;
249            CHECK(msg->findInt32("err", &err));
250
251            notifyPrepared(err);
252            break;
253        }
254
255        case LiveSession::kWhatStreamsChanged:
256        {
257            uint32_t changedMask;
258            CHECK(msg->findInt32(
259                        "changedMask", (int32_t *)&changedMask));
260
261            bool audio = changedMask & LiveSession::STREAMTYPE_AUDIO;
262            bool video = changedMask & LiveSession::STREAMTYPE_VIDEO;
263
264            sp<AMessage> reply;
265            CHECK(msg->findMessage("reply", &reply));
266
267            sp<AMessage> notify = dupNotify();
268            notify->setInt32("what", kWhatQueueDecoderShutdown);
269            notify->setInt32("audio", audio);
270            notify->setInt32("video", video);
271            notify->setMessage("reply", reply);
272            notify->post();
273            break;
274        }
275
276        case LiveSession::kWhatError:
277        {
278            break;
279        }
280
281        default:
282            TRESPASS();
283    }
284}
285
286}  // namespace android
287
288