HTTPLiveSource.cpp revision ced1c2f8f6c422063092f5cc5c675ccdebb2dc10 
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        mLiveSession.clear();
66
67        mLiveLooper->stop();
68        mLiveLooper.clear();
69    }
70}
71
72void NuPlayer::HTTPLiveSource::prepareAsync() {
73    mLiveLooper = new ALooper;
74    mLiveLooper->setName("http live");
75    mLiveLooper->start();
76
77    sp<AMessage> notify = new AMessage(kWhatSessionNotify, id());
78
79    mLiveSession = new LiveSession(
80            notify,
81            (mFlags & kFlagIncognito) ? LiveSession::kFlagIncognito : 0,
82            mHTTPService);
83
84    mLiveLooper->registerHandler(mLiveSession);
85
86    mLiveSession->connectAsync(
87            mURL.c_str(), mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders);
88}
89
90void NuPlayer::HTTPLiveSource::start() {
91}
92
93sp<AMessage> NuPlayer::HTTPLiveSource::getFormat(bool audio) {
94    sp<AMessage> format;
95    status_t err = mLiveSession->getStreamFormat(
96            audio ? LiveSession::STREAMTYPE_AUDIO
97                  : LiveSession::STREAMTYPE_VIDEO,
98            &format);
99
100    if (err != OK) {
101        return NULL;
102    }
103
104    return format;
105}
106
107status_t NuPlayer::HTTPLiveSource::feedMoreTSData() {
108    return OK;
109}
110
111status_t NuPlayer::HTTPLiveSource::dequeueAccessUnit(
112        bool audio, sp<ABuffer> *accessUnit) {
113    return mLiveSession->dequeueAccessUnit(
114            audio ? LiveSession::STREAMTYPE_AUDIO
115                  : LiveSession::STREAMTYPE_VIDEO,
116            accessUnit);
117}
118
119status_t NuPlayer::HTTPLiveSource::getDuration(int64_t *durationUs) {
120    return mLiveSession->getDuration(durationUs);
121}
122
123size_t NuPlayer::HTTPLiveSource::getTrackCount() const {
124    return mLiveSession->getTrackCount();
125}
126
127sp<AMessage> NuPlayer::HTTPLiveSource::getTrackInfo(size_t trackIndex) const {
128    return mLiveSession->getTrackInfo(trackIndex);
129}
130
131status_t NuPlayer::HTTPLiveSource::selectTrack(size_t trackIndex, bool select) {
132    status_t err = mLiveSession->selectTrack(trackIndex, select);
133
134    if (err == OK) {
135        mFetchSubtitleDataGeneration++;
136        if (select) {
137            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
138            msg->setInt32("generation", mFetchSubtitleDataGeneration);
139            msg->post();
140        }
141    }
142
143    // LiveSession::selectTrack returns BAD_VALUE when selecting the currently
144    // selected track, or unselecting a non-selected track. In this case it's an
145    // no-op so we return OK.
146    return (err == OK || err == BAD_VALUE) ? (status_t)OK : err;
147}
148
149status_t NuPlayer::HTTPLiveSource::seekTo(int64_t seekTimeUs) {
150    return mLiveSession->seekTo(seekTimeUs);
151}
152
153void NuPlayer::HTTPLiveSource::onMessageReceived(const sp<AMessage> &msg) {
154    switch (msg->what()) {
155        case kWhatSessionNotify:
156        {
157            onSessionNotify(msg);
158            break;
159        }
160
161        case kWhatFetchSubtitleData:
162        {
163            int32_t generation;
164            CHECK(msg->findInt32("generation", &generation));
165
166            if (generation != mFetchSubtitleDataGeneration) {
167                // stale
168                break;
169            }
170
171            sp<ABuffer> buffer;
172            if (mLiveSession->dequeueAccessUnit(
173                    LiveSession::STREAMTYPE_SUBTITLES, &buffer) == OK) {
174                sp<AMessage> notify = dupNotify();
175                notify->setInt32("what", kWhatSubtitleData);
176                notify->setBuffer("buffer", buffer);
177                notify->post();
178
179                int64_t timeUs, baseUs, durationUs, delayUs;
180                CHECK(buffer->meta()->findInt64("baseUs", &baseUs));
181                CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
182                CHECK(buffer->meta()->findInt64("durationUs", &durationUs));
183                delayUs = baseUs + timeUs - ALooper::GetNowUs();
184
185                msg->post(delayUs > 0ll ? delayUs : 0ll);
186            } else {
187                // try again in 1 second
188                msg->post(1000000ll);
189            }
190
191            break;
192        }
193
194        default:
195            Source::onMessageReceived(msg);
196            break;
197    }
198}
199
200void NuPlayer::HTTPLiveSource::onSessionNotify(const sp<AMessage> &msg) {
201    int32_t what;
202    CHECK(msg->findInt32("what", &what));
203
204    switch (what) {
205        case LiveSession::kWhatPrepared:
206        {
207            // notify the current size here if we have it, otherwise report an initial size of (0,0)
208            sp<AMessage> format = getFormat(false /* audio */);
209            int32_t width;
210            int32_t height;
211            if (format != NULL &&
212                    format->findInt32("width", &width) && format->findInt32("height", &height)) {
213                notifyVideoSizeChanged(format);
214            } else {
215                notifyVideoSizeChanged();
216            }
217
218            uint32_t flags = FLAG_CAN_PAUSE;
219            if (mLiveSession->isSeekable()) {
220                flags |= FLAG_CAN_SEEK;
221                flags |= FLAG_CAN_SEEK_BACKWARD;
222                flags |= FLAG_CAN_SEEK_FORWARD;
223            }
224
225            if (mLiveSession->hasDynamicDuration()) {
226                flags |= FLAG_DYNAMIC_DURATION;
227            }
228
229            notifyFlagsChanged(flags);
230
231            notifyPrepared();
232            break;
233        }
234
235        case LiveSession::kWhatPreparationFailed:
236        {
237            status_t err;
238            CHECK(msg->findInt32("err", &err));
239
240            notifyPrepared(err);
241            break;
242        }
243
244        case LiveSession::kWhatStreamsChanged:
245        {
246            uint32_t changedMask;
247            CHECK(msg->findInt32(
248                        "changedMask", (int32_t *)&changedMask));
249
250            bool audio = changedMask & LiveSession::STREAMTYPE_AUDIO;
251            bool video = changedMask & LiveSession::STREAMTYPE_VIDEO;
252
253            sp<AMessage> reply;
254            CHECK(msg->findMessage("reply", &reply));
255
256            sp<AMessage> notify = dupNotify();
257            notify->setInt32("what", kWhatQueueDecoderShutdown);
258            notify->setInt32("audio", audio);
259            notify->setInt32("video", video);
260            notify->setMessage("reply", reply);
261            notify->post();
262            break;
263        }
264
265        case LiveSession::kWhatError:
266        {
267            break;
268        }
269
270        default:
271            TRESPASS();
272    }
273}
274
275}  // namespace android
276
277