Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 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 "MPEG2TSExtractor" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "include/MPEG2TSExtractor.h" |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 22 | #include "include/LiveSession.h" |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 23 | #include "include/NuCachedSource2.h" |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 24 | |
| 25 | #include <media/stagefright/DataSource.h> |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 26 | #include <media/stagefright/MediaDebug.h> |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 27 | #include <media/stagefright/MediaDefs.h> |
| 28 | #include <media/stagefright/MediaErrors.h> |
| 29 | #include <media/stagefright/MediaSource.h> |
| 30 | #include <media/stagefright/MetaData.h> |
| 31 | #include <utils/String8.h> |
| 32 | |
| 33 | #include "AnotherPacketSource.h" |
| 34 | #include "ATSParser.h" |
| 35 | |
| 36 | namespace android { |
| 37 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 38 | static const size_t kTSPacketSize = 188; |
| 39 | |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 40 | struct MPEG2TSSource : public MediaSource { |
| 41 | MPEG2TSSource( |
| 42 | const sp<MPEG2TSExtractor> &extractor, |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 43 | const sp<AnotherPacketSource> &impl, |
| 44 | bool seekable); |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 45 | |
| 46 | virtual status_t start(MetaData *params = NULL); |
| 47 | virtual status_t stop(); |
| 48 | virtual sp<MetaData> getFormat(); |
| 49 | |
| 50 | virtual status_t read( |
| 51 | MediaBuffer **buffer, const ReadOptions *options = NULL); |
| 52 | |
| 53 | private: |
| 54 | sp<MPEG2TSExtractor> mExtractor; |
| 55 | sp<AnotherPacketSource> mImpl; |
| 56 | |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 57 | // If there are both audio and video streams, only the video stream |
| 58 | // will be seekable, otherwise the single stream will be seekable. |
| 59 | bool mSeekable; |
| 60 | |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 61 | DISALLOW_EVIL_CONSTRUCTORS(MPEG2TSSource); |
| 62 | }; |
| 63 | |
| 64 | MPEG2TSSource::MPEG2TSSource( |
| 65 | const sp<MPEG2TSExtractor> &extractor, |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 66 | const sp<AnotherPacketSource> &impl, |
| 67 | bool seekable) |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 68 | : mExtractor(extractor), |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 69 | mImpl(impl), |
| 70 | mSeekable(seekable) { |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | status_t MPEG2TSSource::start(MetaData *params) { |
| 74 | return mImpl->start(params); |
| 75 | } |
| 76 | |
| 77 | status_t MPEG2TSSource::stop() { |
| 78 | return mImpl->stop(); |
| 79 | } |
| 80 | |
| 81 | sp<MetaData> MPEG2TSSource::getFormat() { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 82 | sp<MetaData> meta = mImpl->getFormat(); |
| 83 | |
| 84 | int64_t durationUs; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 85 | if (mExtractor->mLiveSession != NULL |
| 86 | && mExtractor->mLiveSession->getDuration(&durationUs) == OK) { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 87 | meta->setInt64(kKeyDuration, durationUs); |
| 88 | } |
| 89 | |
| 90 | return meta; |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | status_t MPEG2TSSource::read( |
| 94 | MediaBuffer **out, const ReadOptions *options) { |
| 95 | *out = NULL; |
| 96 | |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 97 | int64_t seekTimeUs; |
| 98 | ReadOptions::SeekMode seekMode; |
| 99 | if (mSeekable && options && options->getSeekTo(&seekTimeUs, &seekMode)) { |
| 100 | mExtractor->seekTo(seekTimeUs); |
| 101 | } |
| 102 | |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 103 | status_t finalResult; |
| 104 | while (!mImpl->hasBufferAvailable(&finalResult)) { |
| 105 | if (finalResult != OK) { |
| 106 | return ERROR_END_OF_STREAM; |
| 107 | } |
| 108 | |
| 109 | status_t err = mExtractor->feedMore(); |
| 110 | if (err != OK) { |
| 111 | mImpl->signalEOS(err); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return mImpl->read(out, options); |
| 116 | } |
| 117 | |
| 118 | //////////////////////////////////////////////////////////////////////////////// |
| 119 | |
| 120 | MPEG2TSExtractor::MPEG2TSExtractor(const sp<DataSource> &source) |
| 121 | : mDataSource(source), |
| 122 | mParser(new ATSParser), |
| 123 | mOffset(0) { |
| 124 | init(); |
| 125 | } |
| 126 | |
| 127 | size_t MPEG2TSExtractor::countTracks() { |
| 128 | return mSourceImpls.size(); |
| 129 | } |
| 130 | |
| 131 | sp<MediaSource> MPEG2TSExtractor::getTrack(size_t index) { |
| 132 | if (index >= mSourceImpls.size()) { |
| 133 | return NULL; |
| 134 | } |
| 135 | |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 136 | bool seekable = true; |
| 137 | if (mSourceImpls.size() > 1) { |
| 138 | CHECK_EQ(mSourceImpls.size(), 2u); |
| 139 | |
| 140 | sp<MetaData> meta = mSourceImpls.editItemAt(index)->getFormat(); |
| 141 | const char *mime; |
| 142 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 143 | |
| 144 | if (!strncasecmp("audio/", mime, 6)) { |
| 145 | seekable = false; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | return new MPEG2TSSource(this, mSourceImpls.editItemAt(index), seekable); |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | sp<MetaData> MPEG2TSExtractor::getTrackMetaData( |
| 153 | size_t index, uint32_t flags) { |
| 154 | return index < mSourceImpls.size() |
| 155 | ? mSourceImpls.editItemAt(index)->getFormat() : NULL; |
| 156 | } |
| 157 | |
| 158 | sp<MetaData> MPEG2TSExtractor::getMetaData() { |
| 159 | sp<MetaData> meta = new MetaData; |
| 160 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_MPEG2TS); |
| 161 | |
| 162 | return meta; |
| 163 | } |
| 164 | |
| 165 | void MPEG2TSExtractor::init() { |
| 166 | bool haveAudio = false; |
| 167 | bool haveVideo = false; |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 168 | int numPacketsParsed = 0; |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 169 | |
| 170 | while (feedMore() == OK) { |
| 171 | ATSParser::SourceType type; |
| 172 | if (haveAudio && haveVideo) { |
| 173 | break; |
| 174 | } |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 175 | if (!haveVideo) { |
| 176 | sp<AnotherPacketSource> impl = |
| 177 | (AnotherPacketSource *)mParser->getSource( |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 178 | ATSParser::VIDEO).get(); |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 179 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 180 | if (impl != NULL) { |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 181 | haveVideo = true; |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 182 | mSourceImpls.push(impl); |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 183 | } |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | if (!haveAudio) { |
| 187 | sp<AnotherPacketSource> impl = |
| 188 | (AnotherPacketSource *)mParser->getSource( |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 189 | ATSParser::AUDIO).get(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 190 | |
| 191 | if (impl != NULL) { |
| 192 | haveAudio = true; |
| 193 | mSourceImpls.push(impl); |
| 194 | } |
| 195 | } |
| 196 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 197 | if (++numPacketsParsed > 10000) { |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 198 | break; |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 199 | } |
| 200 | } |
| 201 | |
| 202 | LOGI("haveAudio=%d, haveVideo=%d", haveAudio, haveVideo); |
| 203 | } |
| 204 | |
| 205 | status_t MPEG2TSExtractor::feedMore() { |
| 206 | Mutex::Autolock autoLock(mLock); |
| 207 | |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 208 | uint8_t packet[kTSPacketSize]; |
| 209 | ssize_t n = mDataSource->readAt(mOffset, packet, kTSPacketSize); |
| 210 | |
Andreas Huber | d6c421f | 2011-02-16 09:05:38 -0800 | [diff] [blame] | 211 | if (n < (ssize_t)kTSPacketSize) { |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 212 | return (n < 0) ? (status_t)n : ERROR_END_OF_STREAM; |
| 213 | } |
| 214 | |
Andreas Huber | 4c19bf9 | 2010-09-08 14:32:20 -0700 | [diff] [blame] | 215 | mOffset += n; |
Andreas Huber | eeddb0e | 2011-08-31 16:29:05 -0700 | [diff] [blame] | 216 | return mParser->feedTSPacket(packet, kTSPacketSize); |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 217 | } |
| 218 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 219 | void MPEG2TSExtractor::setLiveSession(const sp<LiveSession> &liveSession) { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 220 | Mutex::Autolock autoLock(mLock); |
| 221 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 222 | mLiveSession = liveSession; |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | void MPEG2TSExtractor::seekTo(int64_t seekTimeUs) { |
| 226 | Mutex::Autolock autoLock(mLock); |
| 227 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 228 | if (mLiveSession == NULL) { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 229 | return; |
| 230 | } |
| 231 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 232 | mLiveSession->seekTo(seekTimeUs); |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | uint32_t MPEG2TSExtractor::flags() const { |
| 236 | Mutex::Autolock autoLock(mLock); |
| 237 | |
| 238 | uint32_t flags = CAN_PAUSE; |
| 239 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 240 | if (mLiveSession != NULL && mLiveSession->isSeekable()) { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 241 | flags |= CAN_SEEK_FORWARD | CAN_SEEK_BACKWARD | CAN_SEEK; |
| 242 | } |
| 243 | |
| 244 | return flags; |
| 245 | } |
| 246 | |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 247 | //////////////////////////////////////////////////////////////////////////////// |
| 248 | |
| 249 | bool SniffMPEG2TS( |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 250 | const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| 251 | sp<AMessage> *) { |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 252 | for (int i = 0; i < 5; ++i) { |
| 253 | char header; |
| 254 | if (source->readAt(kTSPacketSize * i, &header, 1) != 1 |
| 255 | || header != 0x47) { |
| 256 | return false; |
| 257 | } |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 260 | *confidence = 0.1f; |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 261 | mimeType->setTo(MEDIA_MIMETYPE_CONTAINER_MPEG2TS); |
| 262 | |
| 263 | return true; |
Andreas Huber | a557b24 | 2010-06-07 13:05:37 -0700 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | } // namespace android |