Andreas Huber | c751ecc | 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> |
| 31 | |
| 32 | #include "include/ESDS.h" |
| 33 | |
| 34 | namespace android { |
| 35 | |
| 36 | struct MPEG2TSWriter::SourceInfo : public AHandler { |
| 37 | SourceInfo(const sp<MediaSource> &source); |
| 38 | |
| 39 | void start(const sp<AMessage> ¬ify); |
| 40 | void stop(); |
| 41 | |
| 42 | unsigned streamType() const; |
| 43 | unsigned incrementContinuityCounter(); |
| 44 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 45 | void readMore(); |
| 46 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 47 | enum { |
| 48 | kNotifyStartFailed, |
| 49 | kNotifyBuffer, |
| 50 | kNotifyReachedEOS, |
| 51 | }; |
| 52 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 53 | sp<ABuffer> lastAccessUnit(); |
| 54 | int64_t lastAccessUnitTimeUs(); |
| 55 | void setLastAccessUnit(const sp<ABuffer> &accessUnit); |
| 56 | |
| 57 | void setEOSReceived(); |
| 58 | bool eosReceived() const; |
| 59 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 60 | protected: |
| 61 | virtual void onMessageReceived(const sp<AMessage> &msg); |
| 62 | |
| 63 | virtual ~SourceInfo(); |
| 64 | |
| 65 | private: |
| 66 | enum { |
| 67 | kWhatStart = 'strt', |
| 68 | kWhatRead = 'read', |
| 69 | }; |
| 70 | |
| 71 | sp<MediaSource> mSource; |
| 72 | sp<ALooper> mLooper; |
| 73 | sp<AMessage> mNotify; |
| 74 | |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 75 | sp<ABuffer> mAACCodecSpecificData; |
| 76 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 77 | sp<ABuffer> mAACBuffer; |
| 78 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 79 | sp<ABuffer> mLastAccessUnit; |
| 80 | bool mEOSReceived; |
| 81 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 82 | unsigned mStreamType; |
| 83 | unsigned mContinuityCounter; |
| 84 | |
| 85 | void extractCodecSpecificData(); |
| 86 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 87 | bool appendAACFrames(MediaBuffer *buffer); |
| 88 | bool flushAACFrames(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 89 | |
| 90 | void postAVCFrame(MediaBuffer *buffer); |
| 91 | |
| 92 | DISALLOW_EVIL_CONSTRUCTORS(SourceInfo); |
| 93 | }; |
| 94 | |
| 95 | MPEG2TSWriter::SourceInfo::SourceInfo(const sp<MediaSource> &source) |
| 96 | : mSource(source), |
| 97 | mLooper(new ALooper), |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 98 | mEOSReceived(false), |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 99 | mStreamType(0), |
| 100 | mContinuityCounter(0) { |
| 101 | mLooper->setName("MPEG2TSWriter source"); |
| 102 | |
| 103 | sp<MetaData> meta = mSource->getFormat(); |
| 104 | const char *mime; |
| 105 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 106 | |
| 107 | if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 108 | mStreamType = 0x0f; |
| 109 | } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 110 | mStreamType = 0x1b; |
| 111 | } else { |
| 112 | TRESPASS(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | MPEG2TSWriter::SourceInfo::~SourceInfo() { |
| 117 | } |
| 118 | |
| 119 | unsigned MPEG2TSWriter::SourceInfo::streamType() const { |
| 120 | return mStreamType; |
| 121 | } |
| 122 | |
| 123 | unsigned MPEG2TSWriter::SourceInfo::incrementContinuityCounter() { |
| 124 | if (++mContinuityCounter == 16) { |
| 125 | mContinuityCounter = 0; |
| 126 | } |
| 127 | |
| 128 | return mContinuityCounter; |
| 129 | } |
| 130 | |
| 131 | void MPEG2TSWriter::SourceInfo::start(const sp<AMessage> ¬ify) { |
| 132 | mLooper->registerHandler(this); |
| 133 | mLooper->start(); |
| 134 | |
| 135 | mNotify = notify; |
| 136 | |
| 137 | (new AMessage(kWhatStart, id()))->post(); |
| 138 | } |
| 139 | |
| 140 | void MPEG2TSWriter::SourceInfo::stop() { |
| 141 | mLooper->unregisterHandler(id()); |
| 142 | mLooper->stop(); |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 143 | |
| 144 | mSource->stop(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | void MPEG2TSWriter::SourceInfo::extractCodecSpecificData() { |
| 148 | sp<MetaData> meta = mSource->getFormat(); |
| 149 | |
| 150 | const char *mime; |
| 151 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 152 | |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 153 | if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 154 | uint32_t type; |
| 155 | const void *data; |
| 156 | size_t size; |
| 157 | if (!meta->findData(kKeyESDS, &type, &data, &size)) { |
| 158 | // Codec specific data better be in the first data buffer. |
| 159 | return; |
| 160 | } |
| 161 | |
| 162 | ESDS esds((const char *)data, size); |
| 163 | CHECK_EQ(esds.InitCheck(), (status_t)OK); |
| 164 | |
| 165 | const uint8_t *codec_specific_data; |
| 166 | size_t codec_specific_data_size; |
| 167 | esds.getCodecSpecificInfo( |
| 168 | (const void **)&codec_specific_data, &codec_specific_data_size); |
| 169 | |
| 170 | CHECK_GE(codec_specific_data_size, 2u); |
| 171 | |
| 172 | mAACCodecSpecificData = new ABuffer(codec_specific_data_size); |
| 173 | |
| 174 | memcpy(mAACCodecSpecificData->data(), codec_specific_data, |
| 175 | codec_specific_data_size); |
| 176 | |
| 177 | return; |
| 178 | } |
| 179 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 180 | if (strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 181 | return; |
| 182 | } |
| 183 | |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 184 | uint32_t type; |
| 185 | const void *data; |
| 186 | size_t size; |
| 187 | if (!meta->findData(kKeyAVCC, &type, &data, &size)) { |
| 188 | // Codec specific data better be part of the data stream then. |
| 189 | return; |
| 190 | } |
| 191 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 192 | sp<ABuffer> out = new ABuffer(1024); |
| 193 | out->setRange(0, 0); |
| 194 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 195 | const uint8_t *ptr = (const uint8_t *)data; |
| 196 | |
| 197 | size_t numSeqParameterSets = ptr[5] & 31; |
| 198 | |
| 199 | ptr += 6; |
| 200 | size -= 6; |
| 201 | |
| 202 | for (size_t i = 0; i < numSeqParameterSets; ++i) { |
| 203 | CHECK(size >= 2); |
| 204 | size_t length = U16_AT(ptr); |
| 205 | |
| 206 | ptr += 2; |
| 207 | size -= 2; |
| 208 | |
| 209 | CHECK(size >= length); |
| 210 | |
| 211 | CHECK_LE(out->size() + 4 + length, out->capacity()); |
| 212 | memcpy(out->data() + out->size(), "\x00\x00\x00\x01", 4); |
| 213 | memcpy(out->data() + out->size() + 4, ptr, length); |
| 214 | out->setRange(0, out->size() + length + 4); |
| 215 | |
| 216 | ptr += length; |
| 217 | size -= length; |
| 218 | } |
| 219 | |
| 220 | CHECK(size >= 1); |
| 221 | size_t numPictureParameterSets = *ptr; |
| 222 | ++ptr; |
| 223 | --size; |
| 224 | |
| 225 | for (size_t i = 0; i < numPictureParameterSets; ++i) { |
| 226 | CHECK(size >= 2); |
| 227 | size_t length = U16_AT(ptr); |
| 228 | |
| 229 | ptr += 2; |
| 230 | size -= 2; |
| 231 | |
| 232 | CHECK(size >= length); |
| 233 | |
| 234 | CHECK_LE(out->size() + 4 + length, out->capacity()); |
| 235 | memcpy(out->data() + out->size(), "\x00\x00\x00\x01", 4); |
| 236 | memcpy(out->data() + out->size() + 4, ptr, length); |
| 237 | out->setRange(0, out->size() + length + 4); |
| 238 | |
| 239 | ptr += length; |
| 240 | size -= length; |
| 241 | } |
| 242 | |
| 243 | out->meta()->setInt64("timeUs", 0ll); |
| 244 | |
| 245 | sp<AMessage> notify = mNotify->dup(); |
| 246 | notify->setInt32("what", kNotifyBuffer); |
| 247 | notify->setObject("buffer", out); |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 248 | notify->setInt32("oob", true); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 249 | notify->post(); |
| 250 | } |
| 251 | |
| 252 | void MPEG2TSWriter::SourceInfo::postAVCFrame(MediaBuffer *buffer) { |
| 253 | sp<AMessage> notify = mNotify->dup(); |
| 254 | notify->setInt32("what", kNotifyBuffer); |
| 255 | |
| 256 | sp<ABuffer> copy = |
| 257 | new ABuffer(buffer->range_length()); |
| 258 | memcpy(copy->data(), |
| 259 | (const uint8_t *)buffer->data() |
| 260 | + buffer->range_offset(), |
| 261 | buffer->range_length()); |
| 262 | |
| 263 | int64_t timeUs; |
| 264 | CHECK(buffer->meta_data()->findInt64(kKeyTime, &timeUs)); |
| 265 | copy->meta()->setInt64("timeUs", timeUs); |
| 266 | |
| 267 | int32_t isSync; |
| 268 | if (buffer->meta_data()->findInt32(kKeyIsSyncFrame, &isSync) |
| 269 | && isSync != 0) { |
| 270 | copy->meta()->setInt32("isSync", true); |
| 271 | } |
| 272 | |
| 273 | notify->setObject("buffer", copy); |
| 274 | notify->post(); |
| 275 | } |
| 276 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 277 | bool MPEG2TSWriter::SourceInfo::appendAACFrames(MediaBuffer *buffer) { |
| 278 | bool accessUnitPosted = false; |
| 279 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 280 | if (mAACBuffer != NULL |
| 281 | && mAACBuffer->size() + 7 + buffer->range_length() |
| 282 | > mAACBuffer->capacity()) { |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 283 | accessUnitPosted = flushAACFrames(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | if (mAACBuffer == NULL) { |
| 287 | size_t alloc = 4096; |
| 288 | if (buffer->range_length() + 7 > alloc) { |
| 289 | alloc = 7 + buffer->range_length(); |
| 290 | } |
| 291 | |
| 292 | mAACBuffer = new ABuffer(alloc); |
| 293 | |
| 294 | int64_t timeUs; |
| 295 | CHECK(buffer->meta_data()->findInt64(kKeyTime, &timeUs)); |
| 296 | |
| 297 | mAACBuffer->meta()->setInt64("timeUs", timeUs); |
| 298 | mAACBuffer->meta()->setInt32("isSync", true); |
| 299 | |
| 300 | mAACBuffer->setRange(0, 0); |
| 301 | } |
| 302 | |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 303 | const uint8_t *codec_specific_data = mAACCodecSpecificData->data(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 304 | |
| 305 | unsigned profile = (codec_specific_data[0] >> 3) - 1; |
| 306 | |
| 307 | unsigned sampling_freq_index = |
| 308 | ((codec_specific_data[0] & 7) << 1) |
| 309 | | (codec_specific_data[1] >> 7); |
| 310 | |
| 311 | unsigned channel_configuration = |
| 312 | (codec_specific_data[1] >> 3) & 0x0f; |
| 313 | |
| 314 | uint8_t *ptr = mAACBuffer->data() + mAACBuffer->size(); |
| 315 | |
| 316 | const uint32_t aac_frame_length = buffer->range_length() + 7; |
| 317 | |
| 318 | *ptr++ = 0xff; |
| 319 | *ptr++ = 0xf1; // b11110001, ID=0, layer=0, protection_absent=1 |
| 320 | |
| 321 | *ptr++ = |
| 322 | profile << 6 |
| 323 | | sampling_freq_index << 2 |
| 324 | | ((channel_configuration >> 2) & 1); // private_bit=0 |
| 325 | |
| 326 | // original_copy=0, home=0, copyright_id_bit=0, copyright_id_start=0 |
| 327 | *ptr++ = |
| 328 | (channel_configuration & 3) << 6 |
| 329 | | aac_frame_length >> 11; |
| 330 | *ptr++ = (aac_frame_length >> 3) & 0xff; |
| 331 | *ptr++ = (aac_frame_length & 7) << 5; |
| 332 | |
| 333 | // adts_buffer_fullness=0, number_of_raw_data_blocks_in_frame=0 |
| 334 | *ptr++ = 0; |
| 335 | |
| 336 | memcpy(ptr, |
| 337 | (const uint8_t *)buffer->data() + buffer->range_offset(), |
| 338 | buffer->range_length()); |
| 339 | |
| 340 | ptr += buffer->range_length(); |
| 341 | |
| 342 | mAACBuffer->setRange(0, ptr - mAACBuffer->data()); |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 343 | |
| 344 | return accessUnitPosted; |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 345 | } |
| 346 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 347 | bool MPEG2TSWriter::SourceInfo::flushAACFrames() { |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 348 | if (mAACBuffer == NULL) { |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 349 | return false; |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | sp<AMessage> notify = mNotify->dup(); |
| 353 | notify->setInt32("what", kNotifyBuffer); |
| 354 | notify->setObject("buffer", mAACBuffer); |
| 355 | notify->post(); |
| 356 | |
| 357 | mAACBuffer.clear(); |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 358 | |
| 359 | return true; |
| 360 | } |
| 361 | |
| 362 | void MPEG2TSWriter::SourceInfo::readMore() { |
| 363 | (new AMessage(kWhatRead, id()))->post(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | void MPEG2TSWriter::SourceInfo::onMessageReceived(const sp<AMessage> &msg) { |
| 367 | switch (msg->what()) { |
| 368 | case kWhatStart: |
| 369 | { |
| 370 | status_t err = mSource->start(); |
| 371 | if (err != OK) { |
| 372 | sp<AMessage> notify = mNotify->dup(); |
| 373 | notify->setInt32("what", kNotifyStartFailed); |
| 374 | notify->post(); |
| 375 | break; |
| 376 | } |
| 377 | |
| 378 | extractCodecSpecificData(); |
| 379 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 380 | readMore(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 381 | break; |
| 382 | } |
| 383 | |
| 384 | case kWhatRead: |
| 385 | { |
| 386 | MediaBuffer *buffer; |
| 387 | status_t err = mSource->read(&buffer); |
| 388 | |
| 389 | if (err != OK && err != INFO_FORMAT_CHANGED) { |
| 390 | if (mStreamType == 0x0f) { |
| 391 | flushAACFrames(); |
| 392 | } |
| 393 | |
| 394 | sp<AMessage> notify = mNotify->dup(); |
| 395 | notify->setInt32("what", kNotifyReachedEOS); |
| 396 | notify->setInt32("status", err); |
| 397 | notify->post(); |
| 398 | break; |
| 399 | } |
| 400 | |
| 401 | if (err == OK) { |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 402 | if (mStreamType == 0x0f && mAACCodecSpecificData == NULL) { |
| 403 | // The first buffer contains codec specific data. |
| 404 | |
| 405 | CHECK_GE(buffer->range_length(), 2u); |
| 406 | |
| 407 | mAACCodecSpecificData = new ABuffer(buffer->range_length()); |
| 408 | |
| 409 | memcpy(mAACCodecSpecificData->data(), |
| 410 | (const uint8_t *)buffer->data() |
| 411 | + buffer->range_offset(), |
| 412 | buffer->range_length()); |
| 413 | } else if (buffer->range_length() > 0) { |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 414 | if (mStreamType == 0x0f) { |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 415 | if (!appendAACFrames(buffer)) { |
| 416 | msg->post(); |
| 417 | } |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 418 | } else { |
| 419 | postAVCFrame(buffer); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | buffer->release(); |
| 424 | buffer = NULL; |
| 425 | } |
| 426 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 427 | // Do not read more data until told to. |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 428 | break; |
| 429 | } |
| 430 | |
| 431 | default: |
| 432 | TRESPASS(); |
| 433 | } |
| 434 | } |
| 435 | |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 436 | sp<ABuffer> MPEG2TSWriter::SourceInfo::lastAccessUnit() { |
| 437 | return mLastAccessUnit; |
| 438 | } |
| 439 | |
| 440 | void MPEG2TSWriter::SourceInfo::setLastAccessUnit( |
| 441 | const sp<ABuffer> &accessUnit) { |
| 442 | mLastAccessUnit = accessUnit; |
| 443 | } |
| 444 | |
| 445 | int64_t MPEG2TSWriter::SourceInfo::lastAccessUnitTimeUs() { |
| 446 | if (mLastAccessUnit == NULL) { |
| 447 | return -1; |
| 448 | } |
| 449 | |
| 450 | int64_t timeUs; |
| 451 | CHECK(mLastAccessUnit->meta()->findInt64("timeUs", &timeUs)); |
| 452 | |
| 453 | return timeUs; |
| 454 | } |
| 455 | |
| 456 | void MPEG2TSWriter::SourceInfo::setEOSReceived() { |
| 457 | CHECK(!mEOSReceived); |
| 458 | mEOSReceived = true; |
| 459 | } |
| 460 | |
| 461 | bool MPEG2TSWriter::SourceInfo::eosReceived() const { |
| 462 | return mEOSReceived; |
| 463 | } |
| 464 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 465 | //////////////////////////////////////////////////////////////////////////////// |
| 466 | |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 467 | MPEG2TSWriter::MPEG2TSWriter(int fd) |
James Dong | 2747e0e | 2010-11-18 20:59:13 -0800 | [diff] [blame] | 468 | : mFile(fdopen(dup(fd), "wb")), |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 469 | mWriteCookie(NULL), |
| 470 | mWriteFunc(NULL), |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 471 | mStarted(false), |
| 472 | mNumSourcesDone(0), |
| 473 | mNumTSPacketsWritten(0), |
| 474 | mNumTSPacketsBeforeMeta(0) { |
| 475 | init(); |
| 476 | } |
| 477 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 478 | MPEG2TSWriter::MPEG2TSWriter(const char *filename) |
| 479 | : mFile(fopen(filename, "wb")), |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 480 | mWriteCookie(NULL), |
| 481 | mWriteFunc(NULL), |
| 482 | mStarted(false), |
| 483 | mNumSourcesDone(0), |
| 484 | mNumTSPacketsWritten(0), |
| 485 | mNumTSPacketsBeforeMeta(0) { |
| 486 | init(); |
| 487 | } |
| 488 | |
| 489 | MPEG2TSWriter::MPEG2TSWriter( |
| 490 | void *cookie, |
| 491 | ssize_t (*write)(void *cookie, const void *data, size_t size)) |
| 492 | : mFile(NULL), |
| 493 | mWriteCookie(cookie), |
| 494 | mWriteFunc(write), |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 495 | mStarted(false), |
| 496 | mNumSourcesDone(0), |
| 497 | mNumTSPacketsWritten(0), |
| 498 | mNumTSPacketsBeforeMeta(0) { |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 499 | init(); |
| 500 | } |
| 501 | |
| 502 | void MPEG2TSWriter::init() { |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 503 | CHECK(mFile != NULL || mWriteFunc != NULL); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 504 | |
| 505 | mLooper = new ALooper; |
| 506 | mLooper->setName("MPEG2TSWriter"); |
| 507 | |
| 508 | mReflector = new AHandlerReflector<MPEG2TSWriter>(this); |
| 509 | |
| 510 | mLooper->registerHandler(mReflector); |
| 511 | mLooper->start(); |
| 512 | } |
| 513 | |
| 514 | MPEG2TSWriter::~MPEG2TSWriter() { |
Andreas Huber | 9adf466 | 2010-10-12 14:17:45 -0700 | [diff] [blame] | 515 | if (mStarted) { |
| 516 | stop(); |
| 517 | } |
| 518 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 519 | mLooper->unregisterHandler(mReflector->id()); |
| 520 | mLooper->stop(); |
| 521 | |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 522 | if (mFile != NULL) { |
| 523 | fclose(mFile); |
| 524 | mFile = NULL; |
| 525 | } |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | status_t MPEG2TSWriter::addSource(const sp<MediaSource> &source) { |
| 529 | CHECK(!mStarted); |
| 530 | |
| 531 | sp<MetaData> meta = source->getFormat(); |
| 532 | const char *mime; |
| 533 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| 534 | |
| 535 | if (strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC) |
| 536 | && strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 537 | return ERROR_UNSUPPORTED; |
| 538 | } |
| 539 | |
| 540 | sp<SourceInfo> info = new SourceInfo(source); |
| 541 | |
| 542 | mSources.push(info); |
| 543 | |
| 544 | return OK; |
| 545 | } |
| 546 | |
| 547 | status_t MPEG2TSWriter::start(MetaData *param) { |
| 548 | CHECK(!mStarted); |
| 549 | |
| 550 | mStarted = true; |
| 551 | mNumSourcesDone = 0; |
| 552 | mNumTSPacketsWritten = 0; |
| 553 | mNumTSPacketsBeforeMeta = 0; |
| 554 | |
| 555 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 556 | sp<AMessage> notify = |
| 557 | new AMessage(kWhatSourceNotify, mReflector->id()); |
| 558 | |
| 559 | notify->setInt32("source-index", i); |
| 560 | |
| 561 | mSources.editItemAt(i)->start(notify); |
| 562 | } |
| 563 | |
| 564 | return OK; |
| 565 | } |
| 566 | |
| 567 | status_t MPEG2TSWriter::stop() { |
| 568 | CHECK(mStarted); |
| 569 | |
| 570 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 571 | mSources.editItemAt(i)->stop(); |
| 572 | } |
| 573 | mStarted = false; |
| 574 | |
| 575 | return OK; |
| 576 | } |
| 577 | |
| 578 | status_t MPEG2TSWriter::pause() { |
| 579 | CHECK(mStarted); |
| 580 | |
| 581 | return OK; |
| 582 | } |
| 583 | |
| 584 | bool MPEG2TSWriter::reachedEOS() { |
| 585 | return !mStarted || (mNumSourcesDone == mSources.size() ? true : false); |
| 586 | } |
| 587 | |
| 588 | status_t MPEG2TSWriter::dump(int fd, const Vector<String16> &args) { |
| 589 | return OK; |
| 590 | } |
| 591 | |
| 592 | void MPEG2TSWriter::onMessageReceived(const sp<AMessage> &msg) { |
| 593 | switch (msg->what()) { |
| 594 | case kWhatSourceNotify: |
| 595 | { |
| 596 | int32_t sourceIndex; |
| 597 | CHECK(msg->findInt32("source-index", &sourceIndex)); |
| 598 | |
| 599 | int32_t what; |
| 600 | CHECK(msg->findInt32("what", &what)); |
| 601 | |
| 602 | if (what == SourceInfo::kNotifyReachedEOS |
| 603 | || what == SourceInfo::kNotifyStartFailed) { |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 604 | sp<SourceInfo> source = mSources.editItemAt(sourceIndex); |
| 605 | source->setEOSReceived(); |
| 606 | |
| 607 | sp<ABuffer> buffer = source->lastAccessUnit(); |
| 608 | source->setLastAccessUnit(NULL); |
| 609 | |
| 610 | if (buffer != NULL) { |
| 611 | writeTS(); |
| 612 | writeAccessUnit(sourceIndex, buffer); |
| 613 | } |
| 614 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 615 | ++mNumSourcesDone; |
| 616 | } else if (what == SourceInfo::kNotifyBuffer) { |
| 617 | sp<RefBase> obj; |
| 618 | CHECK(msg->findObject("buffer", &obj)); |
| 619 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 620 | sp<ABuffer> buffer = static_cast<ABuffer *>(obj.get()); |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 621 | |
| 622 | int32_t oob; |
| 623 | if (msg->findInt32("oob", &oob) && oob) { |
| 624 | // This is codec specific data delivered out of band. |
| 625 | // It can be written out immediately. |
| 626 | writeTS(); |
| 627 | writeAccessUnit(sourceIndex, buffer); |
| 628 | break; |
| 629 | } |
| 630 | |
| 631 | // We don't just write out data as we receive it from |
| 632 | // the various sources. That would essentially write them |
| 633 | // out in random order (as the thread scheduler determines |
| 634 | // how the messages are dispatched). |
| 635 | // Instead we gather an access unit for all tracks and |
| 636 | // write out the one with the smallest timestamp, then |
| 637 | // request more data for the written out track. |
| 638 | // Rinse, repeat. |
| 639 | // If we don't have data on any track we don't write |
| 640 | // anything just yet. |
| 641 | |
| 642 | sp<SourceInfo> source = mSources.editItemAt(sourceIndex); |
| 643 | |
| 644 | CHECK(source->lastAccessUnit() == NULL); |
| 645 | source->setLastAccessUnit(buffer); |
| 646 | |
Steve Block | 06ade6a | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 647 | ALOGV("lastAccessUnitTimeUs[%d] = %.2f secs", |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 648 | sourceIndex, source->lastAccessUnitTimeUs() / 1E6); |
| 649 | |
| 650 | int64_t minTimeUs = -1; |
| 651 | size_t minIndex = 0; |
| 652 | |
| 653 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 654 | const sp<SourceInfo> &source = mSources.editItemAt(i); |
| 655 | |
| 656 | if (source->eosReceived()) { |
| 657 | continue; |
| 658 | } |
| 659 | |
| 660 | int64_t timeUs = source->lastAccessUnitTimeUs(); |
| 661 | if (timeUs < 0) { |
| 662 | minTimeUs = -1; |
| 663 | break; |
| 664 | } else if (minTimeUs < 0 || timeUs < minTimeUs) { |
| 665 | minTimeUs = timeUs; |
| 666 | minIndex = i; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | if (minTimeUs < 0) { |
Steve Block | 06ade6a | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 671 | ALOGV("not a all tracks have valid data."); |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 672 | break; |
| 673 | } |
| 674 | |
Steve Block | 06ade6a | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 675 | ALOGV("writing access unit at time %.2f secs (index %d)", |
Andreas Huber | fb16f70 | 2010-12-10 15:08:23 -0800 | [diff] [blame] | 676 | minTimeUs / 1E6, minIndex); |
| 677 | |
| 678 | source = mSources.editItemAt(minIndex); |
| 679 | |
| 680 | buffer = source->lastAccessUnit(); |
| 681 | source->setLastAccessUnit(NULL); |
| 682 | |
| 683 | writeTS(); |
| 684 | writeAccessUnit(minIndex, buffer); |
| 685 | |
| 686 | source->readMore(); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 687 | } |
| 688 | break; |
| 689 | } |
| 690 | |
| 691 | default: |
| 692 | TRESPASS(); |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | void MPEG2TSWriter::writeProgramAssociationTable() { |
| 697 | // 0x47 |
| 698 | // transport_error_indicator = b0 |
| 699 | // payload_unit_start_indicator = b1 |
| 700 | // transport_priority = b0 |
| 701 | // PID = b0000000000000 (13 bits) |
| 702 | // transport_scrambling_control = b00 |
| 703 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 704 | // continuity_counter = b???? |
| 705 | // skip = 0x00 |
| 706 | // --- payload follows |
| 707 | // table_id = 0x00 |
| 708 | // section_syntax_indicator = b1 |
| 709 | // must_be_zero = b0 |
| 710 | // reserved = b11 |
| 711 | // section_length = 0x00d |
| 712 | // transport_stream_id = 0x0000 |
| 713 | // reserved = b11 |
| 714 | // version_number = b00001 |
| 715 | // current_next_indicator = b1 |
| 716 | // section_number = 0x00 |
| 717 | // last_section_number = 0x00 |
| 718 | // one program follows: |
| 719 | // program_number = 0x0001 |
| 720 | // reserved = b111 |
| 721 | // program_map_PID = 0x01e0 (13 bits!) |
| 722 | // CRC = 0x???????? |
| 723 | |
| 724 | static const uint8_t kData[] = { |
| 725 | 0x47, |
| 726 | 0x40, 0x00, 0x10, 0x00, // b0100 0000 0000 0000 0001 ???? 0000 0000 |
| 727 | 0x00, 0xb0, 0x0d, 0x00, // b0000 0000 1011 0000 0000 1101 0000 0000 |
| 728 | 0x00, 0xc3, 0x00, 0x00, // b0000 0000 1100 0011 0000 0000 0000 0000 |
| 729 | 0x00, 0x01, 0xe1, 0xe0, // b0000 0000 0000 0001 1110 0001 1110 0000 |
| 730 | 0x00, 0x00, 0x00, 0x00 // b???? ???? ???? ???? ???? ???? ???? ???? |
| 731 | }; |
| 732 | |
| 733 | sp<ABuffer> buffer = new ABuffer(188); |
| 734 | memset(buffer->data(), 0, buffer->size()); |
| 735 | memcpy(buffer->data(), kData, sizeof(kData)); |
| 736 | |
| 737 | static const unsigned kContinuityCounter = 5; |
| 738 | buffer->data()[3] |= kContinuityCounter; |
| 739 | |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 740 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | void MPEG2TSWriter::writeProgramMap() { |
| 744 | // 0x47 |
| 745 | // transport_error_indicator = b0 |
| 746 | // payload_unit_start_indicator = b1 |
| 747 | // transport_priority = b0 |
| 748 | // PID = b0 0001 1110 0000 (13 bits) [0x1e0] |
| 749 | // transport_scrambling_control = b00 |
| 750 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 751 | // continuity_counter = b???? |
| 752 | // skip = 0x00 |
| 753 | // -- payload follows |
| 754 | // table_id = 0x02 |
| 755 | // section_syntax_indicator = b1 |
| 756 | // must_be_zero = b0 |
| 757 | // reserved = b11 |
| 758 | // section_length = 0x??? |
| 759 | // program_number = 0x0001 |
| 760 | // reserved = b11 |
| 761 | // version_number = b00001 |
| 762 | // current_next_indicator = b1 |
| 763 | // section_number = 0x00 |
| 764 | // last_section_number = 0x00 |
| 765 | // reserved = b111 |
| 766 | // PCR_PID = b? ???? ???? ???? (13 bits) |
| 767 | // reserved = b1111 |
| 768 | // program_info_length = 0x000 |
| 769 | // one or more elementary stream descriptions follow: |
| 770 | // stream_type = 0x?? |
| 771 | // reserved = b111 |
| 772 | // elementary_PID = b? ???? ???? ???? (13 bits) |
| 773 | // reserved = b1111 |
| 774 | // ES_info_length = 0x000 |
| 775 | // CRC = 0x???????? |
| 776 | |
| 777 | static const uint8_t kData[] = { |
| 778 | 0x47, |
| 779 | 0x41, 0xe0, 0x10, 0x00, // b0100 0001 1110 0000 0001 ???? 0000 0000 |
| 780 | 0x02, 0xb0, 0x00, 0x00, // b0000 0010 1011 ???? ???? ???? 0000 0000 |
| 781 | 0x01, 0xc3, 0x00, 0x00, // b0000 0001 1100 0011 0000 0000 0000 0000 |
| 782 | 0xe0, 0x00, 0xf0, 0x00 // b111? ???? ???? ???? 1111 0000 0000 0000 |
| 783 | }; |
| 784 | |
| 785 | sp<ABuffer> buffer = new ABuffer(188); |
| 786 | memset(buffer->data(), 0, buffer->size()); |
| 787 | memcpy(buffer->data(), kData, sizeof(kData)); |
| 788 | |
| 789 | static const unsigned kContinuityCounter = 5; |
| 790 | buffer->data()[3] |= kContinuityCounter; |
| 791 | |
| 792 | size_t section_length = 5 * mSources.size() + 4 + 9; |
| 793 | buffer->data()[6] |= section_length >> 8; |
| 794 | buffer->data()[7] = section_length & 0xff; |
| 795 | |
| 796 | static const unsigned kPCR_PID = 0x1e1; |
| 797 | buffer->data()[13] |= (kPCR_PID >> 8) & 0x1f; |
| 798 | buffer->data()[14] = kPCR_PID & 0xff; |
| 799 | |
| 800 | uint8_t *ptr = &buffer->data()[sizeof(kData)]; |
| 801 | for (size_t i = 0; i < mSources.size(); ++i) { |
| 802 | *ptr++ = mSources.editItemAt(i)->streamType(); |
| 803 | |
| 804 | const unsigned ES_PID = 0x1e0 + i + 1; |
| 805 | *ptr++ = 0xe0 | (ES_PID >> 8); |
| 806 | *ptr++ = ES_PID & 0xff; |
| 807 | *ptr++ = 0xf0; |
| 808 | *ptr++ = 0x00; |
| 809 | } |
| 810 | |
| 811 | *ptr++ = 0x00; |
| 812 | *ptr++ = 0x00; |
| 813 | *ptr++ = 0x00; |
| 814 | *ptr++ = 0x00; |
| 815 | |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 816 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | void MPEG2TSWriter::writeAccessUnit( |
| 820 | int32_t sourceIndex, const sp<ABuffer> &accessUnit) { |
| 821 | // 0x47 |
| 822 | // transport_error_indicator = b0 |
| 823 | // payload_unit_start_indicator = b1 |
| 824 | // transport_priority = b0 |
| 825 | // PID = b0 0001 1110 ???? (13 bits) [0x1e0 + 1 + sourceIndex] |
| 826 | // transport_scrambling_control = b00 |
| 827 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 828 | // continuity_counter = b???? |
| 829 | // -- payload follows |
| 830 | // packet_startcode_prefix = 0x000001 |
| 831 | // stream_id = 0x?? (0xe0 for avc video, 0xc0 for aac audio) |
| 832 | // PES_packet_length = 0x???? |
| 833 | // reserved = b10 |
| 834 | // PES_scrambling_control = b00 |
| 835 | // PES_priority = b0 |
| 836 | // data_alignment_indicator = b1 |
| 837 | // copyright = b0 |
| 838 | // original_or_copy = b0 |
| 839 | // PTS_DTS_flags = b10 (PTS only) |
| 840 | // ESCR_flag = b0 |
| 841 | // ES_rate_flag = b0 |
| 842 | // DSM_trick_mode_flag = b0 |
| 843 | // additional_copy_info_flag = b0 |
| 844 | // PES_CRC_flag = b0 |
| 845 | // PES_extension_flag = b0 |
| 846 | // PES_header_data_length = 0x05 |
| 847 | // reserved = b0010 (PTS) |
| 848 | // PTS[32..30] = b??? |
| 849 | // reserved = b1 |
| 850 | // PTS[29..15] = b??? ???? ???? ???? (15 bits) |
| 851 | // reserved = b1 |
| 852 | // PTS[14..0] = b??? ???? ???? ???? (15 bits) |
| 853 | // reserved = b1 |
| 854 | // the first fragment of "buffer" follows |
| 855 | |
| 856 | sp<ABuffer> buffer = new ABuffer(188); |
| 857 | memset(buffer->data(), 0, buffer->size()); |
| 858 | |
| 859 | const unsigned PID = 0x1e0 + sourceIndex + 1; |
| 860 | |
| 861 | const unsigned continuity_counter = |
| 862 | mSources.editItemAt(sourceIndex)->incrementContinuityCounter(); |
| 863 | |
| 864 | // XXX if there are multiple streams of a kind (more than 1 audio or |
| 865 | // more than 1 video) they need distinct stream_ids. |
| 866 | const unsigned stream_id = |
| 867 | mSources.editItemAt(sourceIndex)->streamType() == 0x0f ? 0xc0 : 0xe0; |
| 868 | |
| 869 | int64_t timeUs; |
| 870 | CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs)); |
| 871 | |
| 872 | uint32_t PTS = (timeUs * 9ll) / 100ll; |
| 873 | |
| 874 | size_t PES_packet_length = accessUnit->size() + 8; |
| 875 | |
Andreas Huber | 99bc1da | 2010-10-15 11:30:21 -0700 | [diff] [blame] | 876 | if (PES_packet_length >= 65536) { |
| 877 | // This really should only happen for video. |
| 878 | CHECK_EQ(stream_id, 0xe0u); |
| 879 | |
| 880 | // It's valid to set this to 0 for video according to the specs. |
| 881 | PES_packet_length = 0; |
| 882 | } |
| 883 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 884 | uint8_t *ptr = buffer->data(); |
| 885 | *ptr++ = 0x47; |
| 886 | *ptr++ = 0x40 | (PID >> 8); |
| 887 | *ptr++ = PID & 0xff; |
| 888 | *ptr++ = 0x10 | continuity_counter; |
| 889 | *ptr++ = 0x00; |
| 890 | *ptr++ = 0x00; |
| 891 | *ptr++ = 0x01; |
| 892 | *ptr++ = stream_id; |
| 893 | *ptr++ = PES_packet_length >> 8; |
| 894 | *ptr++ = PES_packet_length & 0xff; |
| 895 | *ptr++ = 0x84; |
| 896 | *ptr++ = 0x80; |
| 897 | *ptr++ = 0x05; |
| 898 | *ptr++ = 0x20 | (((PTS >> 30) & 7) << 1) | 1; |
| 899 | *ptr++ = (PTS >> 22) & 0xff; |
| 900 | *ptr++ = (((PTS >> 15) & 0x7f) << 1) | 1; |
| 901 | *ptr++ = (PTS >> 7) & 0xff; |
| 902 | *ptr++ = ((PTS & 0x7f) << 1) | 1; |
| 903 | |
| 904 | size_t sizeLeft = buffer->data() + buffer->size() - ptr; |
| 905 | size_t copy = accessUnit->size(); |
| 906 | if (copy > sizeLeft) { |
| 907 | copy = sizeLeft; |
| 908 | } |
| 909 | |
| 910 | memcpy(ptr, accessUnit->data(), copy); |
| 911 | |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 912 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), buffer->size()); |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 913 | |
| 914 | size_t offset = copy; |
| 915 | while (offset < accessUnit->size()) { |
| 916 | // for subsequent fragments of "buffer": |
| 917 | // 0x47 |
| 918 | // transport_error_indicator = b0 |
| 919 | // payload_unit_start_indicator = b0 |
| 920 | // transport_priority = b0 |
| 921 | // PID = b0 0001 1110 ???? (13 bits) [0x1e0 + 1 + sourceIndex] |
| 922 | // transport_scrambling_control = b00 |
| 923 | // adaptation_field_control = b01 (no adaptation field, payload only) |
| 924 | // continuity_counter = b???? |
| 925 | // the fragment of "buffer" follows. |
| 926 | |
| 927 | memset(buffer->data(), 0, buffer->size()); |
| 928 | |
| 929 | const unsigned continuity_counter = |
| 930 | mSources.editItemAt(sourceIndex)->incrementContinuityCounter(); |
| 931 | |
| 932 | ptr = buffer->data(); |
| 933 | *ptr++ = 0x47; |
| 934 | *ptr++ = 0x00 | (PID >> 8); |
| 935 | *ptr++ = PID & 0xff; |
| 936 | *ptr++ = 0x10 | continuity_counter; |
| 937 | |
| 938 | size_t sizeLeft = buffer->data() + buffer->size() - ptr; |
| 939 | size_t copy = accessUnit->size() - offset; |
| 940 | if (copy > sizeLeft) { |
| 941 | copy = sizeLeft; |
| 942 | } |
| 943 | |
| 944 | memcpy(ptr, accessUnit->data() + offset, copy); |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 945 | CHECK_EQ(internalWrite(buffer->data(), buffer->size()), |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 946 | buffer->size()); |
| 947 | |
| 948 | offset += copy; |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | void MPEG2TSWriter::writeTS() { |
| 953 | if (mNumTSPacketsWritten >= mNumTSPacketsBeforeMeta) { |
| 954 | writeProgramAssociationTable(); |
| 955 | writeProgramMap(); |
| 956 | |
| 957 | mNumTSPacketsBeforeMeta = mNumTSPacketsWritten + 2500; |
| 958 | } |
| 959 | } |
| 960 | |
Andreas Huber | 068dbbf | 2011-06-27 15:47:56 -0700 | [diff] [blame] | 961 | ssize_t MPEG2TSWriter::internalWrite(const void *data, size_t size) { |
| 962 | if (mFile != NULL) { |
| 963 | return fwrite(data, 1, size, mFile); |
| 964 | } |
| 965 | |
| 966 | return (*mWriteFunc)(mWriteCookie, data, size); |
| 967 | } |
| 968 | |
Andreas Huber | c751ecc | 2010-09-27 12:04:43 -0700 | [diff] [blame] | 969 | } // namespace android |
| 970 | |