HTTPLiveSource.cpp revision 1d15ab58bf8239069ef343de6cb21aabf3ef7d78 
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, this);
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
142ssize_t NuPlayer::HTTPLiveSource::getSelectedTrack(media_track_type type) const {
143    if (mLiveSession == NULL) {
144        return -1;
145    } else {
146        return mLiveSession->getSelectedTrack(type);
147    }
148}
149
150status_t NuPlayer::HTTPLiveSource::selectTrack(size_t trackIndex, bool select, int64_t /*timeUs*/) {
151    status_t err = mLiveSession->selectTrack(trackIndex, select);
152
153    if (err == OK) {
154        mFetchSubtitleDataGeneration++;
155        if (select) {
156            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
157            msg->setInt32("generation", mFetchSubtitleDataGeneration);
158            msg->post();
159        }
160    }
161
162    // LiveSession::selectTrack returns BAD_VALUE when selecting the currently
163    // selected track, or unselecting a non-selected track. In this case it's an
164    // no-op so we return OK.
165    return (err == OK || err == BAD_VALUE) ? (status_t)OK : err;
166}
167
168status_t NuPlayer::HTTPLiveSource::seekTo(int64_t seekTimeUs) {
169    return mLiveSession->seekTo(seekTimeUs);
170}
171
172void NuPlayer::HTTPLiveSource::onMessageReceived(const sp<AMessage> &msg) {
173    switch (msg->what()) {
174        case kWhatSessionNotify:
175        {
176            onSessionNotify(msg);
177            break;
178        }
179
180        case kWhatFetchSubtitleData:
181        {
182            int32_t generation;
183            CHECK(msg->findInt32("generation", &generation));
184
185            if (generation != mFetchSubtitleDataGeneration) {
186                // stale
187                break;
188            }
189
190            sp<ABuffer> buffer;
191            if (mLiveSession->dequeueAccessUnit(
192                    LiveSession::STREAMTYPE_SUBTITLES, &buffer) == OK) {
193                sp<AMessage> notify = dupNotify();
194                notify->setInt32("what", kWhatSubtitleData);
195                notify->setBuffer("buffer", buffer);
196                notify->post();
197
198                int64_t timeUs, baseUs, durationUs, delayUs;
199                CHECK(buffer->meta()->findInt64("baseUs", &baseUs));
200                CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
201                CHECK(buffer->meta()->findInt64("durationUs", &durationUs));
202                delayUs = baseUs + timeUs - ALooper::GetNowUs();
203
204                msg->post(delayUs > 0ll ? delayUs : 0ll);
205            } else {
206                // try again in 1 second
207                msg->post(1000000ll);
208            }
209
210            break;
211        }
212
213        default:
214            Source::onMessageReceived(msg);
215            break;
216    }
217}
218
219void NuPlayer::HTTPLiveSource::onSessionNotify(const sp<AMessage> &msg) {
220    int32_t what;
221    CHECK(msg->findInt32("what", &what));
222
223    switch (what) {
224        case LiveSession::kWhatPrepared:
225        {
226            // notify the current size here if we have it, otherwise report an initial size of (0,0)
227            sp<AMessage> format = getFormat(false /* audio */);
228            int32_t width;
229            int32_t height;
230            if (format != NULL &&
231                    format->findInt32("width", &width) && format->findInt32("height", &height)) {
232                notifyVideoSizeChanged(format);
233            } else {
234                notifyVideoSizeChanged();
235            }
236
237            uint32_t flags = FLAG_CAN_PAUSE;
238            if (mLiveSession->isSeekable()) {
239                flags |= FLAG_CAN_SEEK;
240                flags |= FLAG_CAN_SEEK_BACKWARD;
241                flags |= FLAG_CAN_SEEK_FORWARD;
242            }
243
244            if (mLiveSession->hasDynamicDuration()) {
245                flags |= FLAG_DYNAMIC_DURATION;
246            }
247
248            notifyFlagsChanged(flags);
249
250            notifyPrepared();
251            break;
252        }
253
254        case LiveSession::kWhatPreparationFailed:
255        {
256            status_t err;
257            CHECK(msg->findInt32("err", &err));
258
259            notifyPrepared(err);
260            break;
261        }
262
263        case LiveSession::kWhatStreamsChanged:
264        {
265            uint32_t changedMask;
266            CHECK(msg->findInt32(
267                        "changedMask", (int32_t *)&changedMask));
268
269            bool audio = changedMask & LiveSession::STREAMTYPE_AUDIO;
270            bool video = changedMask & LiveSession::STREAMTYPE_VIDEO;
271
272            sp<AMessage> reply;
273            CHECK(msg->findMessage("reply", &reply));
274
275            sp<AMessage> notify = dupNotify();
276            notify->setInt32("what", kWhatQueueDecoderShutdown);
277            notify->setInt32("audio", audio);
278            notify->setInt32("video", video);
279            notify->setMessage("reply", reply);
280            notify->post();
281            break;
282        }
283
284        case LiveSession::kWhatError:
285        {
286            break;
287        }
288
289        default:
290            TRESPASS();
291    }
292}
293
294}  // namespace android
295
296