Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -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 "MPEG2TSWriter" |
| 19 | #include <media/stagefright/foundation/ADebug.h> |
| 20 | |
| 21 | #include <media/stagefright/foundation/hexdump.h> |
| 22 | #include <media/stagefright/foundation/ABuffer.h> |
| 23 | #include <media/stagefright/foundation/AMessage.h> |
| 24 | #include <media/stagefright/MPEG2TSWriter.h> |
| 25 | #include <media/stagefright/MediaBuffer.h> |
| 26 | #include <media/stagefright/MediaDefs.h> |
| 27 | #include <media/stagefright/MediaErrors.h> |
| 28 | #include <media/stagefright/MediaSource.h> |
| 29 | #include <media/stagefright/MetaData.h> |
| 30 | #include <media/stagefright/Utils.h> |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 32 | |
| 33 | #include "include/ESDS.h" |
| 34 | |
| 35 | namespace android { |
| 36 | |
| 37 | struct MPEG2TSWriter::SourceInfo : public AHandler { |
| 38 | SourceInfo(const sp<MediaSource> &source); |
| 39 | |
| 40 | void start(const sp<AMessage> ¬ify); |
| 41 | void stop(); |
| 42 | |
| 43 | unsigned streamType() const; |
| 44 | unsigned incrementContinuityCounter(); |
| 45 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 46 | void readMore(); |
| 47 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 48 | enum { |
| 49 | kNotifyStartFailed, |
| 50 | kNotifyBuffer, |
| 51 | kNotifyReachedEOS, |
| 52 | }; |
| 53 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 54 | sp<ABuffer> lastAccessUnit(); |
| 55 | int64_t lastAccessUnitTimeUs(); |
| 56 | void setLastAccessUnit(const sp<ABuffer> &accessUnit); |
| 57 | |
| 58 | void setEOSReceived(); |
| 59 | bool eosReceived() const; |
| 60 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 61 | protected: |
| 62 | virtual void onMessageReceived(const sp<AMessage> &msg); |
| 63 | |
| 64 | virtual ~SourceInfo(); |
| 65 | |
| 66 | private: |
| 67 | enum { |
| 68 | kWhatStart = 'strt', |
| 69 | kWhatRead = 'read', |
| 70 | }; |
| 71 | |
| 72 | sp<MediaSource> mSource; |
| 73 | sp<ALooper> mLooper; |
| 74 | sp<AMessage> mNotify; |
| 75 | |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 76 | sp<ABuffer> mAACCodecSpecificData; |
| 77 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 78 | sp<ABuffer> mAACBuffer; |
| 79 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 80 | sp<ABuffer> mLastAccessUnit; |
| 81 | bool mEOSReceived; |
| 82 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 83 | unsigned mStreamType; |
| 84 | unsigned mContinuityCounter; |
| 85 | |
| 86 | void extractCodecSpecificData(); |
| 87 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 88 | bool appendAACFrames(MediaBuffer *buffer); |
| 89 | bool flushAACFrames(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 90 | |
| 91 | void postAVCFrame(MediaBuffer *buffer); |
| 92 | |
| 93 | DISALLOW_EVIL_CONSTRUCTORS(SourceInfo); |
| 94 | }; |
| 95 | |
| 96 | MPEG2TSWriter::SourceInfo::SourceInfo(const sp<MediaSource> &source) |
| 97 | : mSource(source), |
| 98 | mLooper(new ALooper), |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 99 | mEOSReceived(false), |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 100 | mStreamType(0), |
| 101 | mContinuityCounter(0) { |
| 102 | mLooper->setName("MPEG2TSWriter source"); |
| 103 | |
| 104 | sp<MetaData> meta = mSource->getFormat(); |
| 105 | const char *mime; |
| 106 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 107 | |
| 108 | if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 109 | mStreamType = 0x0f; |
| 110 | } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 111 | mStreamType = 0x1b; |
| 112 | } else { |
| 113 | TRESPASS(); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | MPEG2TSWriter::SourceInfo::~SourceInfo() { |
| 118 | } |
| 119 | |
| 120 | unsigned MPEG2TSWriter::SourceInfo::streamType() const { |
| 121 | return mStreamType; |
| 122 | } |
| 123 | |
| 124 | unsigned MPEG2TSWriter::SourceInfo::incrementContinuityCounter() { |
| 125 | if (++mContinuityCounter == 16) { |
| 126 | mContinuityCounter = 0; |
| 127 | } |
| 128 | |
| 129 | return mContinuityCounter; |
| 130 | } |
| 131 | |
| 132 | void MPEG2TSWriter::SourceInfo::start(const sp<AMessage> ¬ify) { |
| 133 | mLooper->registerHandler(this); |
| 134 | mLooper->start(); |
| 135 | |
| 136 | mNotify = notify; |
| 137 | |
| 138 | (new AMessage(kWhatStart, id()))->post(); |
| 139 | } |
| 140 | |
| 141 | void MPEG2TSWriter::SourceInfo::stop() { |
| 142 | mLooper->unregisterHandler(id()); |
| 143 | mLooper->stop(); |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 144 | |
| 145 | mSource->stop(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | void MPEG2TSWriter::SourceInfo::extractCodecSpecificData() { |
| 149 | sp<MetaData> meta = mSource->getFormat(); |
| 150 | |
| 151 | const char *mime; |
| 152 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 153 | |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 154 | if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 155 | uint32_t type; |
| 156 | const void *data; |
| 157 | size_t size; |
| 158 | if (!meta->findData(kKeyESDS, &type, &data, &size)) { |
| 159 | // Codec specific data better be in the first data buffer. |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | ESDS esds((const char *)data, size); |
| 164 | CHECK_EQ(esds.InitCheck(), (status_t)OK); |
| 165 | |
| 166 | const uint8_t *codec_specific_data; |
| 167 | size_t codec_specific_data_size; |
| 168 | esds.getCodecSpecificInfo( |
| 169 | (const void **)&codec_specific_data, &codec_specific_data_size); |
| 170 | |
| 171 | CHECK_GE(codec_specific_data_size, 2u); |
| 172 | |
| 173 | mAACCodecSpecificData = new ABuffer(codec_specific_data_size); |
| 174 | |
| 175 | memcpy(mAACCodecSpecificData->data(), codec_specific_data, |
| 176 | codec_specific_data_size); |
| 177 | |
| 178 | return; |
| 179 | } |
| 180 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 181 | if (strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 182 | return; |
| 183 | } |
| 184 | |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 185 | uint32_t type; |
| 186 | const void *data; |
| 187 | size_t size; |
| 188 | if (!meta->findData(kKeyAVCC, &type, &data, &size)) { |
| 189 | // Codec specific data better be part of the data stream then. |
| 190 | return; |
| 191 | } |
| 192 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 193 | sp<ABuffer> out = new ABuffer(1024); |
| 194 | out->setRange(0, 0); |
| 195 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 196 | const uint8_t *ptr = (const uint8_t *)data; |
| 197 | |
| 198 | size_t numSeqParameterSets = ptr[5] & 31; |
| 199 | |
| 200 | ptr += 6; |
| 201 | size -= 6; |
| 202 | |
| 203 | for (size_t i = 0; i < numSeqParameterSets; ++i) { |
| 204 | CHECK(size >= 2); |
| 205 | size_t length = U16_AT(ptr); |
| 206 | |
| 207 | ptr += 2; |
| 208 | size -= 2; |
| 209 | |
| 210 | CHECK(size >= length); |
| 211 | |
| 212 | CHECK_LE(out->size() + 4 + length, out->capacity()); |
| 213 | memcpy(out->data() + out->size(), "\x00\x00\x00\x01", 4); |
| 214 | memcpy(out->data() + out->size() + 4, ptr, length); |
| 215 | out->setRange(0, out->size() + length + 4); |
| 216 | |
| 217 | ptr += length; |
| 218 | size -= length; |
| 219 | } |
| 220 | |
| 221 | CHECK(size >= 1); |
| 222 | size_t numPictureParameterSets = *ptr; |
| 223 | ++ptr; |
| 224 | --size; |
| 225 | |
| 226 | for (size_t i = 0; i < numPictureParameterSets; ++i) { |
| 227 | CHECK(size >= 2); |
| 228 | size_t length = U16_AT(ptr); |
| 229 | |
| 230 | ptr += 2; |
| 231 | size -= 2; |
| 232 | |
| 233 | CHECK(size >= length); |
| 234 | |
| 235 | CHECK_LE(out->size() + 4 + length, out->capacity()); |
| 236 | memcpy(out->data() + out->size(), "\x00\x00\x00\x01", 4); |
| 237 | memcpy(out->data() + out->size() + 4, ptr, length); |
| 238 | out->setRange(0, out->size() + length + 4); |
| 239 | |
| 240 | ptr += length; |
| 241 | size -= length; |
| 242 | } |
| 243 | |
| 244 | out->meta()->setInt64("timeUs", 0ll); |
| 245 | |
| 246 | sp<AMessage> notify = mNotify->dup(); |
| 247 | notify->setInt32("what", kNotifyBuffer); |
Andreas Huber | 2d8bedd | 2012-02-21 14:38:23 -0800 | [diff] [blame] | 248 | notify->setBuffer("buffer", out); |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 249 | notify->setInt32("oob", true); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 250 | notify->post(); |
| 251 | } |
| 252 | |
| 253 | void MPEG2TSWriter::SourceInfo::postAVCFrame(MediaBuffer *buffer) { |
| 254 | sp<AMessage> notify = mNotify->dup(); |
| 255 | notify->setInt32("what", kNotifyBuffer); |
| 256 | |
| 257 | sp<ABuffer> copy = |
| 258 | new ABuffer(buffer->range_length()); |
| 259 | memcpy(copy->data(), |
| 260 | (const uint8_t *)buffer->data() |
| 261 | + buffer->range_offset(), |
| 262 | buffer->range_length()); |
| 263 | |
| 264 | int64_t timeUs; |
| 265 | CHECK(buffer->meta_data()->findInt64(kKeyTime, &timeUs)); |
| 266 | copy->meta()->setInt64("timeUs", timeUs); |
| 267 | |
| 268 | int32_t isSync; |
| 269 | if (buffer->meta_data()->findInt32(kKeyIsSyncFrame, &isSync) |
| 270 | && isSync != 0) { |
| 271 | copy->meta()->setInt32("isSync", true); |
| 272 | } |
| 273 | |
Andreas Huber | 2d8bedd | 2012-02-21 14:38:23 -0800 | [diff] [blame] | 274 | notify->setBuffer("buffer", copy); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 275 | notify->post(); |
| 276 | } |
| 277 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 278 | bool MPEG2TSWriter::SourceInfo::appendAACFrames(MediaBuffer *buffer) { |
| 279 | bool accessUnitPosted = false; |
| 280 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 281 | if (mAACBuffer != NULL |
| 282 | && mAACBuffer->size() + 7 + buffer->range_length() |
| 283 | > mAACBuffer->capacity()) { |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 284 | accessUnitPosted = flushAACFrames(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | if (mAACBuffer == NULL) { |
| 288 | size_t alloc = 4096; |
| 289 | if (buffer->range_length() + 7 > alloc) { |
| 290 | alloc = 7 + buffer->range_length(); |
| 291 | } |
| 292 | |
| 293 | mAACBuffer = new ABuffer(alloc); |
| 294 | |
| 295 | int64_t timeUs; |
| 296 | CHECK(buffer->meta_data()->findInt64(kKeyTime, &timeUs)); |
| 297 | |
| 298 | mAACBuffer->meta()->setInt64("timeUs", timeUs); |
| 299 | mAACBuffer->meta()->setInt32("isSync", true); |
| 300 | |
| 301 | mAACBuffer->setRange(0, 0); |
| 302 | } |
| 303 | |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 304 | const uint8_t *codec_specific_data = mAACCodecSpecificData->data(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 305 | |
| 306 | unsigned profile = (codec_specific_data[0] >> 3) - 1; |
| 307 | |
| 308 | unsigned sampling_freq_index = |
| 309 | ((codec_specific_data[0] & 7) << 1) |
| 310 | | (codec_specific_data[1] >> 7); |
| 311 | |
| 312 | unsigned channel_configuration = |
| 313 | (codec_specific_data[1] >> 3) & 0x0f; |
| 314 | |
| 315 | uint8_t *ptr = mAACBuffer->data() + mAACBuffer->size(); |
| 316 | |
| 317 | const uint32_t aac_frame_length = buffer->range_length() + 7; |
| 318 | |
| 319 | *ptr++ = 0xff; |
| 320 | *ptr++ = 0xf1; // b11110001, ID=0, layer=0, protection_absent=1 |
| 321 | |
| 322 | *ptr++ = |
| 323 | profile << 6 |
| 324 | | sampling_freq_index << 2 |
| 325 | | ((channel_configuration >> 2) & 1); // private_bit=0 |
| 326 | |
| 327 | // original_copy=0, home=0, copyright_id_bit=0, copyright_id_start=0 |
| 328 | *ptr++ = |
| 329 | (channel_configuration & 3) << 6 |
| 330 | | aac_frame_length >> 11; |
| 331 | *ptr++ = (aac_frame_length >> 3) & 0xff; |
| 332 | *ptr++ = (aac_frame_length & 7) << 5; |
| 333 | |
| 334 | // adts_buffer_fullness=0, number_of_raw_data_blocks_in_frame=0 |
| 335 | *ptr++ = 0; |
| 336 | |
| 337 | memcpy(ptr, |
| 338 | (const uint8_t *)buffer->data() + buffer->range_offset(), |
| 339 | buffer->range_length()); |
| 340 | |
| 341 | ptr += buffer->range_length(); |
| 342 | |
| 343 | mAACBuffer->setRange(0, ptr - mAACBuffer->data()); |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 344 | |
| 345 | return accessUnitPosted; |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 348 | bool MPEG2TSWriter::SourceInfo::flushAACFrames() { |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 349 | if (mAACBuffer == NULL) { |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 350 | return false; |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | sp<AMessage> notify = mNotify->dup(); |
| 354 | notify->setInt32("what", kNotifyBuffer); |
Andreas Huber | 2d8bedd | 2012-02-21 14:38:23 -0800 | [diff] [blame] | 355 | notify->setBuffer("buffer", mAACBuffer); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 356 | notify->post(); |
| 357 | |
| 358 | mAACBuffer.clear(); |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 359 | |
| 360 | return true; |
| 361 | } |
| 362 | |
| 363 | void MPEG2TSWriter::SourceInfo::readMore() { |
| 364 | (new AMessage(kWhatRead, id()))->post(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | void MPEG2TSWriter::SourceInfo::onMessageReceived(const sp<AMessage> &msg) { |
| 368 | switch (msg->what()) { |
| 369 | case kWhatStart: |
| 370 | { |
| 371 | status_t err = mSource->start(); |
| 372 | if (err != OK) { |
| 373 | sp<AMessage> notify = mNotify->dup(); |
| 374 | notify->setInt32("what", kNotifyStartFailed); |
| 375 | notify->post(); |
| 376 | break; |
| 377 | } |
| 378 | |
| 379 | extractCodecSpecificData(); |
| 380 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 381 | readMore(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 382 | break; |
| 383 | } |
| 384 | |
| 385 | case kWhatRead: |
| 386 | { |
| 387 | MediaBuffer *buffer; |
| 388 | status_t err = mSource->read(&buffer); |
| 389 | |
| 390 | if (err != OK && err != INFO_FORMAT_CHANGED) { |
| 391 | if (mStreamType == 0x0f) { |
| 392 | flushAACFrames(); |
| 393 | } |
| 394 | |
| 395 | sp<AMessage> notify = mNotify->dup(); |
| 396 | notify->setInt32("what", kNotifyReachedEOS); |
| 397 | notify->setInt32("status", err); |
| 398 | notify->post(); |
| 399 | break; |
| 400 | } |
| 401 | |
| 402 | if (err == OK) { |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 403 | if (mStreamType == 0x0f && mAACCodecSpecificData == NULL) { |
| 404 | // The first buffer contains codec specific data. |
| 405 | |
| 406 | CHECK_GE(buffer->range_length(), 2u); |
| 407 | |
| 408 | mAACCodecSpecificData = new ABuffer(buffer->range_length()); |
| 409 | |
| 410 | memcpy(mAACCodecSpecificData->data(), |
| 411 | (const uint8_t *)buffer->data() |
| 412 | + buffer->range_offset(), |
| 413 | buffer->range_length()); |
| 414 | } else if (buffer->range_length() > 0) { |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 415 | if (mStreamType == 0x0f) { |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 416 | if (!appendAACFrames(buffer)) { |
| 417 | msg->post(); |
| 418 | } |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 419 | } else { |
| 420 | postAVCFrame(buffer); |
| 421 | } |
Martin Storsjo | 02d1845 | 2012-08-29 14:49:28 +0300 | [diff] [blame] | 422 | } else { |
| 423 | readMore(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | buffer->release(); |
| 427 | buffer = NULL; |
| 428 | } |
| 429 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 430 | // Do not read more data until told to. |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 431 | break; |
| 432 | } |
| 433 | |
| 434 | default: |
| 435 | TRESPASS(); |
| 436 | } |
| 437 | } |
| 438 | |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 439 | sp<ABuffer> MPEG2TSWriter::SourceInfo::lastAccessUnit() { |
| 440 | return mLastAccessUnit; |
| 441 | } |
| 442 | |
| 443 | void MPEG2TSWriter::SourceInfo::setLastAccessUnit( |
| 444 | const sp<ABuffer> &accessUnit) { |
| 445 | mLastAccessUnit = accessUnit; |
| 446 | } |
| 447 | |
| 448 | int64_t MPEG2TSWriter::SourceInfo::lastAccessUnitTimeUs() { |
| 449 | if (mLastAccessUnit == NULL) { |
| 450 | return -1; |
| 451 | } |
| 452 | |
| 453 | int64_t timeUs; |
| 454 | CHECK(mLastAccessUnit->meta()->findInt64("timeUs", &timeUs)); |
| 455 | |
| 456 | return timeUs; |
| 457 | } |
| 458 | |
| 459 | void MPEG2TSWriter::SourceInfo::setEOSReceived() { |
| 460 | CHECK(!mEOSReceived); |
| 461 | mEOSReceived = true; |
| 462 | } |
| 463 | |
| 464 | bool MPEG2TSWriter::SourceInfo::eosReceived() const { |
| 465 | return mEOSReceived; |
| 466 | } |
| 467 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 468 | //////////////////////////////////////////////////////////////////////////////// |
| 469 | |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 470 | MPEG2TSWriter::MPEG2TSWriter(int fd) |
James Dong | 674ebd0 | 2010-11-18 20:59:13 -0800 | [diff] [blame] | 471 | : mFile(fdopen(dup(fd), "wb")), |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 472 | mWriteCookie(NULL), |
| 473 | mWriteFunc(NULL), |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 474 | mStarted(false), |
| 475 | mNumSourcesDone(0), |
| 476 | mNumTSPacketsWritten(0), |
Paul Fariello | d4e5af6 | 2012-01-23 17:24:35 +0100 | [diff] [blame] | 477 | mNumTSPacketsBeforeMeta(0), |
| 478 | mPATContinuityCounter(0), |
| 479 | mPMTContinuityCounter(0) { |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 480 | init(); |
| 481 | } |
| 482 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 483 | MPEG2TSWriter::MPEG2TSWriter(const char *filename) |
| 484 | : mFile(fopen(filename, "wb")), |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 485 | mWriteCookie(NULL), |
| 486 | mWriteFunc(NULL), |
| 487 | mStarted(false), |
| 488 | mNumSourcesDone(0), |
| 489 | mNumTSPacketsWritten(0), |
Paul Fariello | d4e5af6 | 2012-01-23 17:24:35 +0100 | [diff] [blame] | 490 | mNumTSPacketsBeforeMeta(0), |
| 491 | mPATContinuityCounter(0), |
| 492 | mPMTContinuityCounter(0) { |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 493 | init(); |
| 494 | } |
| 495 | |
| 496 | MPEG2TSWriter::MPEG2TSWriter( |
| 497 | void *cookie, |
| 498 | ssize_t (*write)(void *cookie, const void *data, size_t size)) |
| 499 | : mFile(NULL), |
| 500 | mWriteCookie(cookie), |
| 501 | mWriteFunc(write), |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 502 | mStarted(false), |
| 503 | mNumSourcesDone(0), |
| 504 | mNumTSPacketsWritten(0), |
Paul Fariello | d4e5af6 | 2012-01-23 17:24:35 +0100 | [diff] [blame] | 505 | mNumTSPacketsBeforeMeta(0), |
| 506 | mPATContinuityCounter(0), |
| 507 | mPMTContinuityCounter(0) { |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 508 | init(); |
| 509 | } |
| 510 | |
| 511 | void MPEG2TSWriter::init() { |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 512 | CHECK(mFile != NULL || mWriteFunc != NULL); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 513 | |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 514 | initCrcTable(); |
| 515 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 516 | mLooper = new ALooper; |
| 517 | mLooper->setName("MPEG2TSWriter"); |
| 518 | |
| 519 | mReflector = new AHandlerReflector<MPEG2TSWriter>(this); |
| 520 | |
| 521 | mLooper->registerHandler(mReflector); |
| 522 | mLooper->start(); |
| 523 | } |
| 524 | |
| 525 | MPEG2TSWriter::~MPEG2TSWriter() { |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 526 | if (mStarted) { |
James Dong | 8bcc65c | 2012-02-02 15:07:52 -0800 | [diff] [blame] | 527 | reset(); |
Andreas Huber | 59b7dc3 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 528 | } |
| 529 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 530 | mLooper->unregisterHandler(mReflector->id()); |
| 531 | mLooper->stop(); |
| 532 | |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 533 | if (mFile != NULL) { |
| 534 | fclose(mFile); |
| 535 | mFile = NULL; |
| 536 | } |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | status_t MPEG2TSWriter::addSource(const sp<MediaSource> &source) { |
| 540 | CHECK(!mStarted); |
| 541 | |
| 542 | sp<MetaData> meta = source->getFormat(); |
| 543 | const char *mime; |
| 544 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 545 | |
| 546 | if (strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC) |
| 547 | && strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 548 | return ERROR_UNSUPPORTED; |
| 549 | } |
| 550 | |
| 551 | sp<SourceInfo> info = new SourceInfo(source); |
| 552 | |
| 553 | mSources.push(info); |
| 554 | |
| 555 | return OK; |
| 556 | } |
| 557 | |
| 558 | status_t MPEG2TSWriter::start(MetaData *param) { |
| 559 | CHECK(!mStarted); |
| 560 | |
| 561 | mStarted = true; |
| 562 | mNumSourcesDone = 0; |
| 563 | mNumTSPacketsWritten = 0; |
| 564 | mNumTSPacketsBeforeMeta = 0; |
| 565 | |
| 566 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 567 | sp<AMessage> notify = |
| 568 | new AMessage(kWhatSourceNotify, mReflector->id()); |
| 569 | |
| 570 | notify->setInt32("source-index", i); |
| 571 | |
| 572 | mSources.editItemAt(i)->start(notify); |
| 573 | } |
| 574 | |
| 575 | return OK; |
| 576 | } |
| 577 | |
James Dong | 8bcc65c | 2012-02-02 15:07:52 -0800 | [diff] [blame] | 578 | status_t MPEG2TSWriter::reset() { |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 579 | CHECK(mStarted); |
| 580 | |
| 581 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 582 | mSources.editItemAt(i)->stop(); |
| 583 | } |
| 584 | mStarted = false; |
| 585 | |
| 586 | return OK; |
| 587 | } |
| 588 | |
| 589 | status_t MPEG2TSWriter::pause() { |
| 590 | CHECK(mStarted); |
| 591 | |
| 592 | return OK; |
| 593 | } |
| 594 | |
| 595 | bool MPEG2TSWriter::reachedEOS() { |
| 596 | return !mStarted || (mNumSourcesDone == mSources.size() ? true : false); |
| 597 | } |
| 598 | |
| 599 | status_t MPEG2TSWriter::dump(int fd, const Vector<String16> &args) { |
| 600 | return OK; |
| 601 | } |
| 602 | |
| 603 | void MPEG2TSWriter::onMessageReceived(const sp<AMessage> &msg) { |
| 604 | switch (msg->what()) { |
| 605 | case kWhatSourceNotify: |
| 606 | { |
| 607 | int32_t sourceIndex; |
| 608 | CHECK(msg->findInt32("source-index", &sourceIndex)); |
| 609 | |
| 610 | int32_t what; |
| 611 | CHECK(msg->findInt32("what", &what)); |
| 612 | |
| 613 | if (what == SourceInfo::kNotifyReachedEOS |
| 614 | || what == SourceInfo::kNotifyStartFailed) { |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 615 | sp<SourceInfo> source = mSources.editItemAt(sourceIndex); |
| 616 | source->setEOSReceived(); |
| 617 | |
| 618 | sp<ABuffer> buffer = source->lastAccessUnit(); |
| 619 | source->setLastAccessUnit(NULL); |
| 620 | |
| 621 | if (buffer != NULL) { |
| 622 | writeTS(); |
| 623 | writeAccessUnit(sourceIndex, buffer); |
| 624 | } |
| 625 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 626 | ++mNumSourcesDone; |
| 627 | } else if (what == SourceInfo::kNotifyBuffer) { |
Andreas Huber | 2d8bedd | 2012-02-21 14:38:23 -0800 | [diff] [blame] | 628 | sp<ABuffer> buffer; |
| 629 | CHECK(msg->findBuffer("buffer", &buffer)); |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 630 | |
| 631 | int32_t oob; |
| 632 | if (msg->findInt32("oob", &oob) && oob) { |
| 633 | // This is codec specific data delivered out of band. |
| 634 | // It can be written out immediately. |
| 635 | writeTS(); |
| 636 | writeAccessUnit(sourceIndex, buffer); |
| 637 | break; |
| 638 | } |
| 639 | |
| 640 | // We don't just write out data as we receive it from |
| 641 | // the various sources. That would essentially write them |
| 642 | // out in random order (as the thread scheduler determines |
| 643 | // how the messages are dispatched). |
| 644 | // Instead we gather an access unit for all tracks and |
| 645 | // write out the one with the smallest timestamp, then |
| 646 | // request more data for the written out track. |
| 647 | // Rinse, repeat. |
| 648 | // If we don't have data on any track we don't write |
| 649 | // anything just yet. |
| 650 | |
| 651 | sp<SourceInfo> source = mSources.editItemAt(sourceIndex); |
| 652 | |
| 653 | CHECK(source->lastAccessUnit() == NULL); |
| 654 | source->setLastAccessUnit(buffer); |
| 655 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 656 | ALOGV("lastAccessUnitTimeUs[%d] = %.2f secs", |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 657 | sourceIndex, source->lastAccessUnitTimeUs() / 1E6); |
| 658 | |
| 659 | int64_t minTimeUs = -1; |
| 660 | size_t minIndex = 0; |
| 661 | |
| 662 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 663 | const sp<SourceInfo> &source = mSources.editItemAt(i); |
| 664 | |
| 665 | if (source->eosReceived()) { |
| 666 | continue; |
| 667 | } |
| 668 | |
| 669 | int64_t timeUs = source->lastAccessUnitTimeUs(); |
| 670 | if (timeUs < 0) { |
| 671 | minTimeUs = -1; |
| 672 | break; |
| 673 | } else if (minTimeUs < 0 || timeUs < minTimeUs) { |
| 674 | minTimeUs = timeUs; |
| 675 | minIndex = i; |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | if (minTimeUs < 0) { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 680 | ALOGV("not a all tracks have valid data."); |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 681 | break; |
| 682 | } |
| 683 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 684 | ALOGV("writing access unit at time %.2f secs (index %d)", |
Andreas Huber | 3a17752 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 685 | minTimeUs / 1E6, minIndex); |
| 686 | |
| 687 | source = mSources.editItemAt(minIndex); |
| 688 | |
| 689 | buffer = source->lastAccessUnit(); |
| 690 | source->setLastAccessUnit(NULL); |
| 691 | |
| 692 | writeTS(); |
| 693 | writeAccessUnit(minIndex, buffer); |
| 694 | |
| 695 | source->readMore(); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 696 | } |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | default: |
| 701 | TRESPASS(); |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | void MPEG2TSWriter::writeProgramAssociationTable() { |
| 706 | // 0x47 |
| 707 | // transport_error_indicator = b0 |
| 708 | // payload_unit_start_indicator = b1 |
| 709 | // transport_priority = b0 |
| 710 | // PID = b0000000000000 (13 bits) |
| 711 | // transport_scrambling_control = b00 |
| 712 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 713 | // continuity_counter = b???? |
| 714 | // skip = 0x00 |
| 715 | // --- payload follows |
| 716 | // table_id = 0x00 |
| 717 | // section_syntax_indicator = b1 |
| 718 | // must_be_zero = b0 |
| 719 | // reserved = b11 |
| 720 | // section_length = 0x00d |
| 721 | // transport_stream_id = 0x0000 |
| 722 | // reserved = b11 |
| 723 | // version_number = b00001 |
| 724 | // current_next_indicator = b1 |
| 725 | // section_number = 0x00 |
| 726 | // last_section_number = 0x00 |
| 727 | // one program follows: |
| 728 | // program_number = 0x0001 |
| 729 | // reserved = b111 |
| 730 | // program_map_PID = 0x01e0 (13 bits!) |
| 731 | // CRC = 0x???????? |
| 732 | |
| 733 | static const uint8_t kData[] = { |
| 734 | 0x47, |
| 735 | 0x40, 0x00, 0x10, 0x00, // b0100 0000 0000 0000 0001 ???? 0000 0000 |
| 736 | 0x00, 0xb0, 0x0d, 0x00, // b0000 0000 1011 0000 0000 1101 0000 0000 |
| 737 | 0x00, 0xc3, 0x00, 0x00, // b0000 0000 1100 0011 0000 0000 0000 0000 |
| 738 | 0x00, 0x01, 0xe1, 0xe0, // b0000 0000 0000 0001 1110 0001 1110 0000 |
| 739 | 0x00, 0x00, 0x00, 0x00 // b???? ???? ???? ???? ???? ???? ???? ???? |
| 740 | }; |
| 741 | |
| 742 | sp<ABuffer> buffer = new ABuffer(188); |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 743 | memset(buffer->data(), 0xff, buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 744 | memcpy(buffer->data(), kData, sizeof(kData)); |
| 745 | |
Paul Fariello | d4e5af6 | 2012-01-23 17:24:35 +0100 | [diff] [blame] | 746 | if (++mPATContinuityCounter == 16) { |
| 747 | mPATContinuityCounter = 0; |
| 748 | } |
| 749 | buffer->data()[3] |= mPATContinuityCounter; |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 750 | |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 751 | uint32_t crc = htonl(crc32(&buffer->data()[5], 12)); |
| 752 | memcpy(&buffer->data()[17], &crc, sizeof(crc)); |
| 753 | |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 754 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | void MPEG2TSWriter::writeProgramMap() { |
| 758 | // 0x47 |
| 759 | // transport_error_indicator = b0 |
| 760 | // payload_unit_start_indicator = b1 |
| 761 | // transport_priority = b0 |
| 762 | // PID = b0 0001 1110 0000 (13 bits) [0x1e0] |
| 763 | // transport_scrambling_control = b00 |
| 764 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 765 | // continuity_counter = b???? |
| 766 | // skip = 0x00 |
| 767 | // -- payload follows |
| 768 | // table_id = 0x02 |
| 769 | // section_syntax_indicator = b1 |
| 770 | // must_be_zero = b0 |
| 771 | // reserved = b11 |
| 772 | // section_length = 0x??? |
| 773 | // program_number = 0x0001 |
| 774 | // reserved = b11 |
| 775 | // version_number = b00001 |
| 776 | // current_next_indicator = b1 |
| 777 | // section_number = 0x00 |
| 778 | // last_section_number = 0x00 |
| 779 | // reserved = b111 |
| 780 | // PCR_PID = b? ???? ???? ???? (13 bits) |
| 781 | // reserved = b1111 |
| 782 | // program_info_length = 0x000 |
| 783 | // one or more elementary stream descriptions follow: |
| 784 | // stream_type = 0x?? |
| 785 | // reserved = b111 |
| 786 | // elementary_PID = b? ???? ???? ???? (13 bits) |
| 787 | // reserved = b1111 |
| 788 | // ES_info_length = 0x000 |
| 789 | // CRC = 0x???????? |
| 790 | |
| 791 | static const uint8_t kData[] = { |
| 792 | 0x47, |
| 793 | 0x41, 0xe0, 0x10, 0x00, // b0100 0001 1110 0000 0001 ???? 0000 0000 |
| 794 | 0x02, 0xb0, 0x00, 0x00, // b0000 0010 1011 ???? ???? ???? 0000 0000 |
| 795 | 0x01, 0xc3, 0x00, 0x00, // b0000 0001 1100 0011 0000 0000 0000 0000 |
| 796 | 0xe0, 0x00, 0xf0, 0x00 // b111? ???? ???? ???? 1111 0000 0000 0000 |
| 797 | }; |
| 798 | |
| 799 | sp<ABuffer> buffer = new ABuffer(188); |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 800 | memset(buffer->data(), 0xff, buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 801 | memcpy(buffer->data(), kData, sizeof(kData)); |
| 802 | |
Paul Fariello | d4e5af6 | 2012-01-23 17:24:35 +0100 | [diff] [blame] | 803 | if (++mPMTContinuityCounter == 16) { |
| 804 | mPMTContinuityCounter = 0; |
| 805 | } |
| 806 | buffer->data()[3] |= mPMTContinuityCounter; |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 807 | |
| 808 | size_t section_length = 5 * mSources.size() + 4 + 9; |
| 809 | buffer->data()[6] |= section_length >> 8; |
| 810 | buffer->data()[7] = section_length & 0xff; |
| 811 | |
| 812 | static const unsigned kPCR_PID = 0x1e1; |
| 813 | buffer->data()[13] |= (kPCR_PID >> 8) & 0x1f; |
| 814 | buffer->data()[14] = kPCR_PID & 0xff; |
| 815 | |
| 816 | uint8_t *ptr = &buffer->data()[sizeof(kData)]; |
| 817 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 818 | *ptr++ = mSources.editItemAt(i)->streamType(); |
| 819 | |
| 820 | const unsigned ES_PID = 0x1e0 + i + 1; |
| 821 | *ptr++ = 0xe0 | (ES_PID >> 8); |
| 822 | *ptr++ = ES_PID & 0xff; |
| 823 | *ptr++ = 0xf0; |
| 824 | *ptr++ = 0x00; |
| 825 | } |
| 826 | |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 827 | uint32_t crc = htonl(crc32(&buffer->data()[5], 12+mSources.size()*5)); |
| 828 | memcpy(&buffer->data()[17+mSources.size()*5], &crc, sizeof(crc)); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 829 | |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 830 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | void MPEG2TSWriter::writeAccessUnit( |
| 834 | int32_t sourceIndex, const sp<ABuffer> &accessUnit) { |
| 835 | // 0x47 |
| 836 | // transport_error_indicator = b0 |
| 837 | // payload_unit_start_indicator = b1 |
| 838 | // transport_priority = b0 |
| 839 | // PID = b0 0001 1110 ???? (13 bits) [0x1e0 + 1 + sourceIndex] |
| 840 | // transport_scrambling_control = b00 |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 841 | // adaptation_field_control = b?? |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 842 | // continuity_counter = b???? |
| 843 | // -- payload follows |
| 844 | // packet_startcode_prefix = 0x000001 |
| 845 | // stream_id = 0x?? (0xe0 for avc video, 0xc0 for aac audio) |
| 846 | // PES_packet_length = 0x???? |
| 847 | // reserved = b10 |
| 848 | // PES_scrambling_control = b00 |
| 849 | // PES_priority = b0 |
| 850 | // data_alignment_indicator = b1 |
| 851 | // copyright = b0 |
| 852 | // original_or_copy = b0 |
| 853 | // PTS_DTS_flags = b10 (PTS only) |
| 854 | // ESCR_flag = b0 |
| 855 | // ES_rate_flag = b0 |
| 856 | // DSM_trick_mode_flag = b0 |
| 857 | // additional_copy_info_flag = b0 |
| 858 | // PES_CRC_flag = b0 |
| 859 | // PES_extension_flag = b0 |
| 860 | // PES_header_data_length = 0x05 |
| 861 | // reserved = b0010 (PTS) |
| 862 | // PTS[32..30] = b??? |
| 863 | // reserved = b1 |
| 864 | // PTS[29..15] = b??? ???? ???? ???? (15 bits) |
| 865 | // reserved = b1 |
| 866 | // PTS[14..0] = b??? ???? ???? ???? (15 bits) |
| 867 | // reserved = b1 |
| 868 | // the first fragment of "buffer" follows |
| 869 | |
| 870 | sp<ABuffer> buffer = new ABuffer(188); |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 871 | memset(buffer->data(), 0xff, buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 872 | |
| 873 | const unsigned PID = 0x1e0 + sourceIndex + 1; |
| 874 | |
| 875 | const unsigned continuity_counter = |
| 876 | mSources.editItemAt(sourceIndex)->incrementContinuityCounter(); |
| 877 | |
| 878 | // XXX if there are multiple streams of a kind (more than 1 audio or |
| 879 | // more than 1 video) they need distinct stream_ids. |
| 880 | const unsigned stream_id = |
| 881 | mSources.editItemAt(sourceIndex)->streamType() == 0x0f ? 0xc0 : 0xe0; |
| 882 | |
| 883 | int64_t timeUs; |
| 884 | CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs)); |
| 885 | |
| 886 | uint32_t PTS = (timeUs * 9ll) / 100ll; |
| 887 | |
| 888 | size_t PES_packet_length = accessUnit->size() + 8; |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 889 | bool padding = (accessUnit->size() < (188 - 18)); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 890 | |
Andreas Huber | acc82a3 | 2010-10-15 11:30:21 -0700 | [diff] [blame] | 891 | if (PES_packet_length >= 65536) { |
| 892 | // This really should only happen for video. |
| 893 | CHECK_EQ(stream_id, 0xe0u); |
| 894 | |
| 895 | // It's valid to set this to 0 for video according to the specs. |
| 896 | PES_packet_length = 0; |
| 897 | } |
| 898 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 899 | uint8_t *ptr = buffer->data(); |
| 900 | *ptr++ = 0x47; |
| 901 | *ptr++ = 0x40 | (PID >> 8); |
| 902 | *ptr++ = PID & 0xff; |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 903 | *ptr++ = (padding ? 0x30 : 0x10) | continuity_counter; |
| 904 | if (padding) { |
| 905 | int paddingSize = 188 - accessUnit->size() - 18; |
| 906 | *ptr++ = paddingSize - 1; |
| 907 | if (paddingSize >= 2) { |
| 908 | *ptr++ = 0x00; |
| 909 | ptr += paddingSize - 2; |
| 910 | } |
| 911 | } |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 912 | *ptr++ = 0x00; |
| 913 | *ptr++ = 0x00; |
| 914 | *ptr++ = 0x01; |
| 915 | *ptr++ = stream_id; |
| 916 | *ptr++ = PES_packet_length >> 8; |
| 917 | *ptr++ = PES_packet_length & 0xff; |
| 918 | *ptr++ = 0x84; |
| 919 | *ptr++ = 0x80; |
| 920 | *ptr++ = 0x05; |
| 921 | *ptr++ = 0x20 | (((PTS >> 30) & 7) << 1) | 1; |
| 922 | *ptr++ = (PTS >> 22) & 0xff; |
| 923 | *ptr++ = (((PTS >> 15) & 0x7f) << 1) | 1; |
| 924 | *ptr++ = (PTS >> 7) & 0xff; |
| 925 | *ptr++ = ((PTS & 0x7f) << 1) | 1; |
| 926 | |
| 927 | size_t sizeLeft = buffer->data() + buffer->size() - ptr; |
| 928 | size_t copy = accessUnit->size(); |
| 929 | if (copy > sizeLeft) { |
| 930 | copy = sizeLeft; |
| 931 | } |
| 932 | |
| 933 | memcpy(ptr, accessUnit->data(), copy); |
| 934 | |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 935 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 936 | |
| 937 | size_t offset = copy; |
| 938 | while (offset < accessUnit->size()) { |
Martin Storsjo | c867a50 | 2012-08-20 14:34:14 +0100 | [diff] [blame] | 939 | bool lastAccessUnit = ((accessUnit->size() - offset) < 184); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 940 | // for subsequent fragments of "buffer": |
| 941 | // 0x47 |
| 942 | // transport_error_indicator = b0 |
| 943 | // payload_unit_start_indicator = b0 |
| 944 | // transport_priority = b0 |
| 945 | // PID = b0 0001 1110 ???? (13 bits) [0x1e0 + 1 + sourceIndex] |
| 946 | // transport_scrambling_control = b00 |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 947 | // adaptation_field_control = b?? |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 948 | // continuity_counter = b???? |
| 949 | // the fragment of "buffer" follows. |
| 950 | |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 951 | memset(buffer->data(), 0xff, buffer->size()); |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 952 | |
| 953 | const unsigned continuity_counter = |
| 954 | mSources.editItemAt(sourceIndex)->incrementContinuityCounter(); |
| 955 | |
| 956 | ptr = buffer->data(); |
| 957 | *ptr++ = 0x47; |
| 958 | *ptr++ = 0x00 | (PID >> 8); |
| 959 | *ptr++ = PID & 0xff; |
Paul Fariello | 99b99df | 2012-01-23 17:32:06 +0100 | [diff] [blame] | 960 | *ptr++ = (lastAccessUnit ? 0x30 : 0x10) | continuity_counter; |
| 961 | |
| 962 | if (lastAccessUnit) { |
| 963 | // Pad packet using an adaptation field |
| 964 | // Adaptation header all to 0 execpt size |
| 965 | uint8_t paddingSize = (uint8_t)184 - (accessUnit->size() - offset); |
| 966 | *ptr++ = paddingSize - 1; |
| 967 | if (paddingSize >= 2) { |
| 968 | *ptr++ = 0x00; |
| 969 | ptr += paddingSize - 2; |
| 970 | } |
| 971 | } |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 972 | |
| 973 | size_t sizeLeft = buffer->data() + buffer->size() - ptr; |
| 974 | size_t copy = accessUnit->size() - offset; |
| 975 | if (copy > sizeLeft) { |
| 976 | copy = sizeLeft; |
| 977 | } |
| 978 | |
| 979 | memcpy(ptr, accessUnit->data() + offset, copy); |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 980 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 981 | buffer->size()); |
| 982 | |
| 983 | offset += copy; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | void MPEG2TSWriter::writeTS() { |
| 988 | if (mNumTSPacketsWritten >= mNumTSPacketsBeforeMeta) { |
| 989 | writeProgramAssociationTable(); |
| 990 | writeProgramMap(); |
| 991 | |
| 992 | mNumTSPacketsBeforeMeta = mNumTSPacketsWritten + 2500; |
| 993 | } |
| 994 | } |
| 995 | |
Paul Fariello | 9839957 | 2012-01-23 17:21:33 +0100 | [diff] [blame] | 996 | void MPEG2TSWriter::initCrcTable() { |
| 997 | uint32_t poly = 0x04C11DB7; |
| 998 | |
| 999 | for (int i = 0; i < 256; i++) { |
| 1000 | uint32_t crc = i << 24; |
| 1001 | for (int j = 0; j < 8; j++) { |
| 1002 | crc = (crc << 1) ^ ((crc & 0x80000000) ? (poly) : 0); |
| 1003 | } |
| 1004 | mCrcTable[i] = crc; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /** |
| 1009 | * Compute CRC32 checksum for buffer starting at offset start and for length |
| 1010 | * bytes. |
| 1011 | */ |
| 1012 | uint32_t MPEG2TSWriter::crc32(const uint8_t *p_start, size_t length) { |
| 1013 | uint32_t crc = 0xFFFFFFFF; |
| 1014 | const uint8_t *p; |
| 1015 | |
| 1016 | for (p = p_start; p < p_start + length; p++) { |
| 1017 | crc = (crc << 8) ^ mCrcTable[((crc >> 24) ^ *p) & 0xFF]; |
| 1018 | } |
| 1019 | |
| 1020 | return crc; |
| 1021 | } |
| 1022 | |
Andreas Huber | 3e1763e | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 1023 | ssize_t MPEG2TSWriter::internalWrite(const void *data, size_t size) { |
| 1024 | if (mFile != NULL) { |
| 1025 | return fwrite(data, 1, size, mFile); |
| 1026 | } |
| 1027 | |
| 1028 | return (*mWriteFunc)(mWriteCookie, data, size); |
| 1029 | } |
| 1030 | |
Andreas Huber | 0da4dab | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 1031 | } // namespace android |
| 1032 | |