RTSPSource.cpp revision 2d8bedd05437b6fccdbc6bf70f673ffd86744d59 
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 "RTSPSource"
19#include <utils/Log.h>
20
21#include "RTSPSource.h"
22
23#include "AnotherPacketSource.h"
24#include "MyHandler.h"
25
26#include <media/stagefright/MetaData.h>
27
28namespace android {
29
30NuPlayer::RTSPSource::RTSPSource(
31        const char *url,
32        const KeyedVector<String8, String8> *headers,
33        bool uidValid,
34        uid_t uid)
35    : mURL(url),
36      mUIDValid(uidValid),
37      mUID(uid),
38      mFlags(0),
39      mState(DISCONNECTED),
40      mFinalResult(OK),
41      mDisconnectReplyID(0),
42      mSeekGeneration(0) {
43    if (headers) {
44        mExtraHeaders = *headers;
45
46        ssize_t index =
47            mExtraHeaders.indexOfKey(String8("x-hide-urls-from-log"));
48
49        if (index >= 0) {
50            mFlags |= kFlagIncognito;
51
52            mExtraHeaders.removeItemsAt(index);
53        }
54    }
55}
56
57NuPlayer::RTSPSource::~RTSPSource() {
58    if (mLooper != NULL) {
59        mLooper->stop();
60    }
61}
62
63void NuPlayer::RTSPSource::start() {
64    if (mLooper == NULL) {
65        mLooper = new ALooper;
66        mLooper->setName("rtsp");
67        mLooper->start();
68
69        mReflector = new AHandlerReflector<RTSPSource>(this);
70        mLooper->registerHandler(mReflector);
71    }
72
73    CHECK(mHandler == NULL);
74
75    sp<AMessage> notify = new AMessage(kWhatNotify, mReflector->id());
76
77    mHandler = new MyHandler(mURL.c_str(), notify, mUIDValid, mUID);
78    mLooper->registerHandler(mHandler);
79
80    CHECK_EQ(mState, (int)DISCONNECTED);
81    mState = CONNECTING;
82
83    mHandler->connect();
84}
85
86void NuPlayer::RTSPSource::stop() {
87    sp<AMessage> msg = new AMessage(kWhatDisconnect, mReflector->id());
88
89    sp<AMessage> dummy;
90    msg->postAndAwaitResponse(&dummy);
91}
92
93status_t NuPlayer::RTSPSource::feedMoreTSData() {
94    return mFinalResult;
95}
96
97sp<MetaData> NuPlayer::RTSPSource::getFormat(bool audio) {
98    sp<AnotherPacketSource> source = getSource(audio);
99
100    if (source == NULL) {
101        return NULL;
102    }
103
104    return source->getFormat();
105}
106
107status_t NuPlayer::RTSPSource::dequeueAccessUnit(
108        bool audio, sp<ABuffer> *accessUnit) {
109    sp<AnotherPacketSource> source = getSource(audio);
110
111    if (source == NULL) {
112        return -EWOULDBLOCK;
113    }
114
115    status_t finalResult;
116    if (!source->hasBufferAvailable(&finalResult)) {
117        return finalResult == OK ? -EWOULDBLOCK : finalResult;
118    }
119
120    return source->dequeueAccessUnit(accessUnit);
121}
122
123sp<AnotherPacketSource> NuPlayer::RTSPSource::getSource(bool audio) {
124    return audio ? mAudioTrack : mVideoTrack;
125}
126
127status_t NuPlayer::RTSPSource::getDuration(int64_t *durationUs) {
128    *durationUs = 0ll;
129
130    int64_t audioDurationUs;
131    if (mAudioTrack != NULL
132            && mAudioTrack->getFormat()->findInt64(
133                kKeyDuration, &audioDurationUs)
134            && audioDurationUs > *durationUs) {
135        *durationUs = audioDurationUs;
136    }
137
138    int64_t videoDurationUs;
139    if (mVideoTrack != NULL
140            && mVideoTrack->getFormat()->findInt64(
141                kKeyDuration, &videoDurationUs)
142            && videoDurationUs > *durationUs) {
143        *durationUs = videoDurationUs;
144    }
145
146    return OK;
147}
148
149status_t NuPlayer::RTSPSource::seekTo(int64_t seekTimeUs) {
150    sp<AMessage> msg = new AMessage(kWhatPerformSeek, mReflector->id());
151    msg->setInt32("generation", ++mSeekGeneration);
152    msg->setInt64("timeUs", seekTimeUs);
153    msg->post(200000ll);
154
155    return OK;
156}
157
158void NuPlayer::RTSPSource::performSeek(int64_t seekTimeUs) {
159    if (mState != CONNECTED) {
160        return;
161    }
162
163    mState = SEEKING;
164    mHandler->seek(seekTimeUs);
165}
166
167bool NuPlayer::RTSPSource::isSeekable() {
168    return true;
169}
170
171void NuPlayer::RTSPSource::onMessageReceived(const sp<AMessage> &msg) {
172    if (msg->what() == kWhatDisconnect) {
173        uint32_t replyID;
174        CHECK(msg->senderAwaitsResponse(&replyID));
175
176        mDisconnectReplyID = replyID;
177        finishDisconnectIfPossible();
178        return;
179    } else if (msg->what() == kWhatPerformSeek) {
180        int32_t generation;
181        CHECK(msg->findInt32("generation", &generation));
182
183        if (generation != mSeekGeneration) {
184            // obsolete.
185            return;
186        }
187
188        int64_t seekTimeUs;
189        CHECK(msg->findInt64("timeUs", &seekTimeUs));
190
191        performSeek(seekTimeUs);
192        return;
193    }
194
195    CHECK_EQ(msg->what(), (int)kWhatNotify);
196
197    int32_t what;
198    CHECK(msg->findInt32("what", &what));
199
200    switch (what) {
201        case MyHandler::kWhatConnected:
202            onConnected();
203            break;
204
205        case MyHandler::kWhatDisconnected:
206            onDisconnected(msg);
207            break;
208
209        case MyHandler::kWhatSeekDone:
210        {
211            mState = CONNECTED;
212            break;
213        }
214
215        case MyHandler::kWhatAccessUnit:
216        {
217            size_t trackIndex;
218            CHECK(msg->findSize("trackIndex", &trackIndex));
219            CHECK_LT(trackIndex, mTracks.size());
220
221            sp<ABuffer> accessUnit;
222            CHECK(msg->findBuffer("accessUnit", &accessUnit));
223
224            int32_t damaged;
225            if (accessUnit->meta()->findInt32("damaged", &damaged)
226                    && damaged) {
227                ALOGI("dropping damaged access unit.");
228                break;
229            }
230
231            TrackInfo *info = &mTracks.editItemAt(trackIndex);
232
233            sp<AnotherPacketSource> source = info->mSource;
234            if (source != NULL) {
235                uint32_t rtpTime;
236                CHECK(accessUnit->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
237
238                if (!info->mNPTMappingValid) {
239                    // This is a live stream, we didn't receive any normal
240                    // playtime mapping. Assume the first packets correspond
241                    // to time 0.
242
243                    ALOGV("This is a live stream, assuming time = 0");
244
245                    info->mRTPTime = rtpTime;
246                    info->mNormalPlaytimeUs = 0ll;
247                    info->mNPTMappingValid = true;
248                }
249
250                int64_t nptUs =
251                    ((double)rtpTime - (double)info->mRTPTime)
252                        / info->mTimeScale
253                        * 1000000ll
254                        + info->mNormalPlaytimeUs;
255
256                accessUnit->meta()->setInt64("timeUs", nptUs);
257
258                source->queueAccessUnit(accessUnit);
259            }
260            break;
261        }
262
263        case MyHandler::kWhatEOS:
264        {
265            size_t trackIndex;
266            CHECK(msg->findSize("trackIndex", &trackIndex));
267            CHECK_LT(trackIndex, mTracks.size());
268
269            int32_t finalResult;
270            CHECK(msg->findInt32("finalResult", &finalResult));
271            CHECK_NE(finalResult, (status_t)OK);
272
273            TrackInfo *info = &mTracks.editItemAt(trackIndex);
274            sp<AnotherPacketSource> source = info->mSource;
275            if (source != NULL) {
276                source->signalEOS(finalResult);
277            }
278
279            break;
280        }
281
282        case MyHandler::kWhatSeekDiscontinuity:
283        {
284            size_t trackIndex;
285            CHECK(msg->findSize("trackIndex", &trackIndex));
286            CHECK_LT(trackIndex, mTracks.size());
287
288            TrackInfo *info = &mTracks.editItemAt(trackIndex);
289            sp<AnotherPacketSource> source = info->mSource;
290            if (source != NULL) {
291                source->queueDiscontinuity(ATSParser::DISCONTINUITY_SEEK, NULL);
292            }
293
294            break;
295        }
296
297        case MyHandler::kWhatNormalPlayTimeMapping:
298        {
299            size_t trackIndex;
300            CHECK(msg->findSize("trackIndex", &trackIndex));
301            CHECK_LT(trackIndex, mTracks.size());
302
303            uint32_t rtpTime;
304            CHECK(msg->findInt32("rtpTime", (int32_t *)&rtpTime));
305
306            int64_t nptUs;
307            CHECK(msg->findInt64("nptUs", &nptUs));
308
309            TrackInfo *info = &mTracks.editItemAt(trackIndex);
310            info->mRTPTime = rtpTime;
311            info->mNormalPlaytimeUs = nptUs;
312            info->mNPTMappingValid = true;
313            break;
314        }
315
316        default:
317            TRESPASS();
318    }
319}
320
321void NuPlayer::RTSPSource::onConnected() {
322    CHECK(mAudioTrack == NULL);
323    CHECK(mVideoTrack == NULL);
324
325    size_t numTracks = mHandler->countTracks();
326    for (size_t i = 0; i < numTracks; ++i) {
327        int32_t timeScale;
328        sp<MetaData> format = mHandler->getTrackFormat(i, &timeScale);
329
330        const char *mime;
331        CHECK(format->findCString(kKeyMIMEType, &mime));
332
333        bool isAudio = !strncasecmp(mime, "audio/", 6);
334        bool isVideo = !strncasecmp(mime, "video/", 6);
335
336        TrackInfo info;
337        info.mTimeScale = timeScale;
338        info.mRTPTime = 0;
339        info.mNormalPlaytimeUs = 0ll;
340        info.mNPTMappingValid = false;
341
342        if ((isAudio && mAudioTrack == NULL)
343                || (isVideo && mVideoTrack == NULL)) {
344            sp<AnotherPacketSource> source = new AnotherPacketSource(format);
345
346            if (isAudio) {
347                mAudioTrack = source;
348            } else {
349                mVideoTrack = source;
350            }
351
352            info.mSource = source;
353        }
354
355        mTracks.push(info);
356    }
357
358    mState = CONNECTED;
359}
360
361void NuPlayer::RTSPSource::onDisconnected(const sp<AMessage> &msg) {
362    status_t err;
363    CHECK(msg->findInt32("result", &err));
364    CHECK_NE(err, (status_t)OK);
365
366    mLooper->unregisterHandler(mHandler->id());
367    mHandler.clear();
368
369    mState = DISCONNECTED;
370    mFinalResult = err;
371
372    if (mDisconnectReplyID != 0) {
373        finishDisconnectIfPossible();
374    }
375}
376
377void NuPlayer::RTSPSource::finishDisconnectIfPossible() {
378    if (mState != DISCONNECTED) {
379        mHandler->disconnect();
380        return;
381    }
382
383    (new AMessage)->postReply(mDisconnectReplyID);
384    mDisconnectReplyID = 0;
385}
386
387}  // namespace android
388