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 "ATSParser.h"
24 #include "AnotherPacketSource.h"
25 #include "LiveDataSource.h"
26 #include "LiveSession.h"
27
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
34 namespace android {
35
HTTPLiveSource(const char * url,const KeyedVector<String8,String8> * headers,bool uidValid,uid_t uid)36 NuPlayer::HTTPLiveSource::HTTPLiveSource(
37 const char *url,
38 const KeyedVector<String8, String8> *headers,
39 bool uidValid, uid_t uid)
40 : mURL(url),
41 mUIDValid(uidValid),
42 mUID(uid),
43 mFlags(0),
44 mFinalResult(OK),
45 mOffset(0) {
46 if (headers) {
47 mExtraHeaders = *headers;
48
49 ssize_t index =
50 mExtraHeaders.indexOfKey(String8("x-hide-urls-from-log"));
51
52 if (index >= 0) {
53 mFlags |= kFlagIncognito;
54
55 mExtraHeaders.removeItemsAt(index);
56 }
57 }
58 }
59
~HTTPLiveSource()60 NuPlayer::HTTPLiveSource::~HTTPLiveSource() {
61 if (mLiveSession != NULL) {
62 mLiveSession->disconnect();
63 mLiveLooper->stop();
64 }
65 }
66
start()67 void NuPlayer::HTTPLiveSource::start() {
68 mLiveLooper = new ALooper;
69 mLiveLooper->setName("http live");
70 mLiveLooper->start();
71
72 mLiveSession = new LiveSession(
73 (mFlags & kFlagIncognito) ? LiveSession::kFlagIncognito : 0,
74 mUIDValid, mUID);
75
76 mLiveLooper->registerHandler(mLiveSession);
77
78 mLiveSession->connect(
79 mURL.c_str(), mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders);
80
81 mTSParser = new ATSParser;
82 }
83
getFormatMeta(bool audio)84 sp<MetaData> NuPlayer::HTTPLiveSource::getFormatMeta(bool audio) {
85 ATSParser::SourceType type =
86 audio ? ATSParser::AUDIO : ATSParser::VIDEO;
87
88 sp<AnotherPacketSource> source =
89 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
90
91 if (source == NULL) {
92 return NULL;
93 }
94
95 return source->getFormat();
96 }
97
feedMoreTSData()98 status_t NuPlayer::HTTPLiveSource::feedMoreTSData() {
99 if (mFinalResult != OK) {
100 return mFinalResult;
101 }
102
103 sp<LiveDataSource> source =
104 static_cast<LiveDataSource *>(mLiveSession->getDataSource().get());
105
106 for (int32_t i = 0; i < 50; ++i) {
107 char buffer[188];
108 ssize_t n = source->readAtNonBlocking(mOffset, buffer, sizeof(buffer));
109
110 if (n == -EWOULDBLOCK) {
111 break;
112 } else if (n < 0) {
113 if (n != ERROR_END_OF_STREAM) {
114 ALOGI("input data EOS reached, error %ld", n);
115 } else {
116 ALOGI("input data EOS reached.");
117 }
118 mTSParser->signalEOS(n);
119 mFinalResult = n;
120 break;
121 } else {
122 if (buffer[0] == 0x00) {
123 // XXX legacy
124
125 uint8_t type = buffer[1];
126
127 sp<AMessage> extra = new AMessage;
128
129 if (type & 2) {
130 int64_t mediaTimeUs;
131 memcpy(&mediaTimeUs, &buffer[2], sizeof(mediaTimeUs));
132
133 extra->setInt64(IStreamListener::kKeyMediaTimeUs, mediaTimeUs);
134 }
135
136 mTSParser->signalDiscontinuity(
137 ((type & 1) == 0)
138 ? ATSParser::DISCONTINUITY_SEEK
139 : ATSParser::DISCONTINUITY_FORMATCHANGE,
140 extra);
141 } else {
142 status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer));
143
144 if (err != OK) {
145 ALOGE("TS Parser returned error %d", err);
146 mTSParser->signalEOS(err);
147 mFinalResult = err;
148 break;
149 }
150 }
151
152 mOffset += n;
153 }
154 }
155
156 return OK;
157 }
158
dequeueAccessUnit(bool audio,sp<ABuffer> * accessUnit)159 status_t NuPlayer::HTTPLiveSource::dequeueAccessUnit(
160 bool audio, sp<ABuffer> *accessUnit) {
161 ATSParser::SourceType type =
162 audio ? ATSParser::AUDIO : ATSParser::VIDEO;
163
164 sp<AnotherPacketSource> source =
165 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
166
167 if (source == NULL) {
168 return -EWOULDBLOCK;
169 }
170
171 status_t finalResult;
172 if (!source->hasBufferAvailable(&finalResult)) {
173 return finalResult == OK ? -EWOULDBLOCK : finalResult;
174 }
175
176 return source->dequeueAccessUnit(accessUnit);
177 }
178
getDuration(int64_t * durationUs)179 status_t NuPlayer::HTTPLiveSource::getDuration(int64_t *durationUs) {
180 return mLiveSession->getDuration(durationUs);
181 }
182
seekTo(int64_t seekTimeUs)183 status_t NuPlayer::HTTPLiveSource::seekTo(int64_t seekTimeUs) {
184 // We need to make sure we're not seeking until we have seen the very first
185 // PTS timestamp in the whole stream (from the beginning of the stream).
186 while (!mTSParser->PTSTimeDeltaEstablished() && feedMoreTSData() == OK) {
187 usleep(100000);
188 }
189
190 mLiveSession->seekTo(seekTimeUs);
191
192 return OK;
193 }
194
flags() const195 uint32_t NuPlayer::HTTPLiveSource::flags() const {
196 uint32_t flags = 0;
197 if (mLiveSession->isSeekable()) {
198 flags |= FLAG_SEEKABLE;
199 }
200
201 if (mLiveSession->hasDynamicDuration()) {
202 flags |= FLAG_DYNAMIC_DURATION;
203 }
204
205 return flags;
206 }
207
208 } // namespace android
209
210