Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -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 "ESQueue" |
| 19 | #include <media/stagefright/foundation/ADebug.h> |
| 20 | |
| 21 | #include "ESQueue.h" |
| 22 | |
| 23 | #include <media/stagefright/foundation/hexdump.h> |
| 24 | #include <media/stagefright/foundation/ABitReader.h> |
| 25 | #include <media/stagefright/foundation/ABuffer.h> |
| 26 | #include <media/stagefright/foundation/AMessage.h> |
| 27 | #include <media/stagefright/MediaErrors.h> |
| 28 | #include <media/stagefright/MediaDefs.h> |
| 29 | #include <media/stagefright/MetaData.h> |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 30 | #include <media/stagefright/Utils.h> |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 31 | |
| 32 | #include "include/avc_utils.h" |
| 33 | |
| 34 | namespace android { |
| 35 | |
| 36 | ElementaryStreamQueue::ElementaryStreamQueue(Mode mode) |
| 37 | : mMode(mode) { |
| 38 | } |
| 39 | |
| 40 | sp<MetaData> ElementaryStreamQueue::getFormat() { |
| 41 | return mFormat; |
| 42 | } |
| 43 | |
Andreas Huber | a158746 | 2010-12-15 15:17:42 -0800 | [diff] [blame] | 44 | void ElementaryStreamQueue::clear(bool clearFormat) { |
Andreas Huber | 6a1f5f9 | 2010-11-15 09:03:03 -0800 | [diff] [blame] | 45 | if (mBuffer != NULL) { |
| 46 | mBuffer->setRange(0, 0); |
| 47 | } |
| 48 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 49 | mRangeInfos.clear(); |
Andreas Huber | a158746 | 2010-12-15 15:17:42 -0800 | [diff] [blame] | 50 | |
| 51 | if (clearFormat) { |
| 52 | mFormat.clear(); |
| 53 | } |
Andreas Huber | 4c19bf9 | 2010-09-08 14:32:20 -0700 | [diff] [blame] | 54 | } |
| 55 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 56 | static bool IsSeeminglyValidADTSHeader(const uint8_t *ptr, size_t size) { |
| 57 | if (size < 3) { |
| 58 | // Not enough data to verify header. |
| 59 | return false; |
| 60 | } |
| 61 | |
| 62 | if (ptr[0] != 0xff || (ptr[1] >> 4) != 0x0f) { |
| 63 | return false; |
| 64 | } |
| 65 | |
| 66 | unsigned layer = (ptr[1] >> 1) & 3; |
| 67 | |
| 68 | if (layer != 0) { |
| 69 | return false; |
| 70 | } |
| 71 | |
| 72 | unsigned ID = (ptr[1] >> 3) & 1; |
| 73 | unsigned profile_ObjectType = ptr[2] >> 6; |
| 74 | |
| 75 | if (ID == 1 && profile_ObjectType == 3) { |
| 76 | // MPEG-2 profile 3 is reserved. |
| 77 | return false; |
| 78 | } |
| 79 | |
| 80 | return true; |
| 81 | } |
| 82 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 83 | static bool IsSeeminglyValidMPEGAudioHeader(const uint8_t *ptr, size_t size) { |
| 84 | if (size < 3) { |
| 85 | // Not enough data to verify header. |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | if (ptr[0] != 0xff || (ptr[1] >> 5) != 0x07) { |
| 90 | return false; |
| 91 | } |
| 92 | |
| 93 | unsigned ID = (ptr[1] >> 3) & 3; |
| 94 | |
| 95 | if (ID == 1) { |
| 96 | return false; // reserved |
| 97 | } |
| 98 | |
| 99 | unsigned layer = (ptr[1] >> 1) & 3; |
| 100 | |
| 101 | if (layer == 0) { |
| 102 | return false; // reserved |
| 103 | } |
| 104 | |
| 105 | unsigned bitrateIndex = (ptr[2] >> 4); |
| 106 | |
| 107 | if (bitrateIndex == 0x0f) { |
| 108 | return false; // reserved |
| 109 | } |
| 110 | |
| 111 | unsigned samplingRateIndex = (ptr[2] >> 2) & 3; |
| 112 | |
| 113 | if (samplingRateIndex == 3) { |
| 114 | return false; // reserved |
| 115 | } |
| 116 | |
| 117 | return true; |
| 118 | } |
| 119 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 120 | status_t ElementaryStreamQueue::appendData( |
| 121 | const void *data, size_t size, int64_t timeUs) { |
| 122 | if (mBuffer == NULL || mBuffer->size() == 0) { |
| 123 | switch (mMode) { |
| 124 | case H264: |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 125 | case MPEG_VIDEO: |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 126 | { |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 127 | #if 0 |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 128 | if (size < 4 || memcmp("\x00\x00\x00\x01", data, 4)) { |
| 129 | return ERROR_MALFORMED; |
| 130 | } |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 131 | #else |
| 132 | uint8_t *ptr = (uint8_t *)data; |
| 133 | |
| 134 | ssize_t startOffset = -1; |
| 135 | for (size_t i = 0; i + 3 < size; ++i) { |
| 136 | if (!memcmp("\x00\x00\x00\x01", &ptr[i], 4)) { |
| 137 | startOffset = i; |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | if (startOffset < 0) { |
| 143 | return ERROR_MALFORMED; |
| 144 | } |
| 145 | |
| 146 | if (startOffset > 0) { |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 147 | LOGI("found something resembling an H.264/MPEG syncword at " |
| 148 | "offset %ld", |
| 149 | startOffset); |
| 150 | } |
| 151 | |
| 152 | data = &ptr[startOffset]; |
| 153 | size -= startOffset; |
| 154 | #endif |
| 155 | break; |
| 156 | } |
| 157 | |
| 158 | case MPEG4_VIDEO: |
| 159 | { |
| 160 | #if 0 |
| 161 | if (size < 3 || memcmp("\x00\x00\x01", data, 3)) { |
| 162 | return ERROR_MALFORMED; |
| 163 | } |
| 164 | #else |
| 165 | uint8_t *ptr = (uint8_t *)data; |
| 166 | |
| 167 | ssize_t startOffset = -1; |
| 168 | for (size_t i = 0; i + 2 < size; ++i) { |
| 169 | if (!memcmp("\x00\x00\x01", &ptr[i], 3)) { |
| 170 | startOffset = i; |
| 171 | break; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | if (startOffset < 0) { |
| 176 | return ERROR_MALFORMED; |
| 177 | } |
| 178 | |
| 179 | if (startOffset > 0) { |
| 180 | LOGI("found something resembling an H.264/MPEG syncword at " |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 181 | "offset %ld", |
| 182 | startOffset); |
| 183 | } |
| 184 | |
| 185 | data = &ptr[startOffset]; |
| 186 | size -= startOffset; |
| 187 | #endif |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 188 | break; |
| 189 | } |
| 190 | |
| 191 | case AAC: |
| 192 | { |
| 193 | uint8_t *ptr = (uint8_t *)data; |
| 194 | |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 195 | #if 0 |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 196 | if (size < 2 || ptr[0] != 0xff || (ptr[1] >> 4) != 0x0f) { |
| 197 | return ERROR_MALFORMED; |
| 198 | } |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 199 | #else |
| 200 | ssize_t startOffset = -1; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 201 | for (size_t i = 0; i < size; ++i) { |
| 202 | if (IsSeeminglyValidADTSHeader(&ptr[i], size - i)) { |
Andreas Huber | b5c6afc | 2010-12-02 13:27:47 -0800 | [diff] [blame] | 203 | startOffset = i; |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | if (startOffset < 0) { |
| 209 | return ERROR_MALFORMED; |
| 210 | } |
| 211 | |
| 212 | if (startOffset > 0) { |
| 213 | LOGI("found something resembling an AAC syncword at offset %ld", |
| 214 | startOffset); |
| 215 | } |
| 216 | |
| 217 | data = &ptr[startOffset]; |
| 218 | size -= startOffset; |
| 219 | #endif |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 220 | break; |
| 221 | } |
| 222 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 223 | case MPEG_AUDIO: |
| 224 | { |
| 225 | uint8_t *ptr = (uint8_t *)data; |
| 226 | |
| 227 | ssize_t startOffset = -1; |
| 228 | for (size_t i = 0; i < size; ++i) { |
| 229 | if (IsSeeminglyValidMPEGAudioHeader(&ptr[i], size - i)) { |
| 230 | startOffset = i; |
| 231 | break; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | if (startOffset < 0) { |
| 236 | return ERROR_MALFORMED; |
| 237 | } |
| 238 | |
| 239 | if (startOffset > 0) { |
| 240 | LOGI("found something resembling an MPEG audio " |
| 241 | "syncword at offset %ld", |
| 242 | startOffset); |
| 243 | } |
| 244 | |
| 245 | data = &ptr[startOffset]; |
| 246 | size -= startOffset; |
| 247 | break; |
| 248 | } |
| 249 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 250 | default: |
| 251 | TRESPASS(); |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | size_t neededSize = (mBuffer == NULL ? 0 : mBuffer->size()) + size; |
| 257 | if (mBuffer == NULL || neededSize > mBuffer->capacity()) { |
| 258 | neededSize = (neededSize + 65535) & ~65535; |
| 259 | |
Andreas Huber | 4c19bf9 | 2010-09-08 14:32:20 -0700 | [diff] [blame] | 260 | LOGV("resizing buffer to size %d", neededSize); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 261 | |
| 262 | sp<ABuffer> buffer = new ABuffer(neededSize); |
| 263 | if (mBuffer != NULL) { |
| 264 | memcpy(buffer->data(), mBuffer->data(), mBuffer->size()); |
| 265 | buffer->setRange(0, mBuffer->size()); |
| 266 | } else { |
| 267 | buffer->setRange(0, 0); |
| 268 | } |
| 269 | |
| 270 | mBuffer = buffer; |
| 271 | } |
| 272 | |
| 273 | memcpy(mBuffer->data() + mBuffer->size(), data, size); |
| 274 | mBuffer->setRange(0, mBuffer->size() + size); |
| 275 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 276 | RangeInfo info; |
| 277 | info.mLength = size; |
| 278 | info.mTimestampUs = timeUs; |
| 279 | mRangeInfos.push_back(info); |
| 280 | |
| 281 | #if 0 |
| 282 | if (mMode == AAC) { |
| 283 | LOGI("size = %d, timeUs = %.2f secs", size, timeUs / 1E6); |
| 284 | hexdump(data, size); |
| 285 | } |
| 286 | #endif |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 287 | |
| 288 | return OK; |
| 289 | } |
| 290 | |
| 291 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnit() { |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 292 | switch (mMode) { |
| 293 | case H264: |
| 294 | return dequeueAccessUnitH264(); |
| 295 | case AAC: |
| 296 | return dequeueAccessUnitAAC(); |
| 297 | case MPEG_VIDEO: |
| 298 | return dequeueAccessUnitMPEGVideo(); |
| 299 | case MPEG4_VIDEO: |
| 300 | return dequeueAccessUnitMPEG4Video(); |
| 301 | default: |
| 302 | CHECK_EQ((unsigned)mMode, (unsigned)MPEG_AUDIO); |
| 303 | return dequeueAccessUnitMPEGAudio(); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 304 | } |
| 305 | } |
| 306 | |
| 307 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnitAAC() { |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 308 | Vector<size_t> ranges; |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 309 | Vector<size_t> frameOffsets; |
| 310 | Vector<size_t> frameSizes; |
| 311 | size_t auSize = 0; |
| 312 | |
| 313 | size_t offset = 0; |
| 314 | while (offset + 7 <= mBuffer->size()) { |
| 315 | ABitReader bits(mBuffer->data() + offset, mBuffer->size() - offset); |
| 316 | |
| 317 | // adts_fixed_header |
| 318 | |
| 319 | CHECK_EQ(bits.getBits(12), 0xfffu); |
| 320 | bits.skipBits(3); // ID, layer |
| 321 | bool protection_absent = bits.getBits(1) != 0; |
| 322 | |
| 323 | if (mFormat == NULL) { |
| 324 | unsigned profile = bits.getBits(2); |
| 325 | CHECK_NE(profile, 3u); |
| 326 | unsigned sampling_freq_index = bits.getBits(4); |
| 327 | bits.getBits(1); // private_bit |
| 328 | unsigned channel_configuration = bits.getBits(3); |
| 329 | CHECK_NE(channel_configuration, 0u); |
| 330 | bits.skipBits(2); // original_copy, home |
| 331 | |
| 332 | mFormat = MakeAACCodecSpecificData( |
| 333 | profile, sampling_freq_index, channel_configuration); |
Andreas Huber | 54e6649 | 2010-12-23 10:27:40 -0800 | [diff] [blame] | 334 | |
| 335 | int32_t sampleRate; |
| 336 | int32_t numChannels; |
| 337 | CHECK(mFormat->findInt32(kKeySampleRate, &sampleRate)); |
| 338 | CHECK(mFormat->findInt32(kKeyChannelCount, &numChannels)); |
| 339 | |
| 340 | LOGI("found AAC codec config (%d Hz, %d channels)", |
| 341 | sampleRate, numChannels); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 342 | } else { |
| 343 | // profile_ObjectType, sampling_frequency_index, private_bits, |
| 344 | // channel_configuration, original_copy, home |
| 345 | bits.skipBits(12); |
| 346 | } |
| 347 | |
| 348 | // adts_variable_header |
| 349 | |
| 350 | // copyright_identification_bit, copyright_identification_start |
| 351 | bits.skipBits(2); |
| 352 | |
| 353 | unsigned aac_frame_length = bits.getBits(13); |
| 354 | |
| 355 | bits.skipBits(11); // adts_buffer_fullness |
| 356 | |
| 357 | unsigned number_of_raw_data_blocks_in_frame = bits.getBits(2); |
| 358 | |
| 359 | if (number_of_raw_data_blocks_in_frame != 0) { |
| 360 | // To be implemented. |
| 361 | TRESPASS(); |
| 362 | } |
| 363 | |
| 364 | if (offset + aac_frame_length > mBuffer->size()) { |
| 365 | break; |
| 366 | } |
| 367 | |
| 368 | size_t headerSize = protection_absent ? 7 : 9; |
| 369 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 370 | ranges.push(aac_frame_length); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 371 | frameOffsets.push(offset + headerSize); |
| 372 | frameSizes.push(aac_frame_length - headerSize); |
| 373 | auSize += aac_frame_length - headerSize; |
| 374 | |
| 375 | offset += aac_frame_length; |
| 376 | } |
| 377 | |
| 378 | if (offset == 0) { |
| 379 | return NULL; |
| 380 | } |
| 381 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 382 | int64_t timeUs = -1; |
| 383 | |
| 384 | for (size_t i = 0; i < ranges.size(); ++i) { |
| 385 | int64_t tmpUs = fetchTimestamp(ranges.itemAt(i)); |
| 386 | |
| 387 | if (i == 0) { |
| 388 | timeUs = tmpUs; |
| 389 | } |
| 390 | } |
| 391 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 392 | sp<ABuffer> accessUnit = new ABuffer(auSize); |
| 393 | size_t dstOffset = 0; |
| 394 | for (size_t i = 0; i < frameOffsets.size(); ++i) { |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 395 | size_t frameOffset = frameOffsets.itemAt(i); |
| 396 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 397 | memcpy(accessUnit->data() + dstOffset, |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 398 | mBuffer->data() + frameOffset, |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 399 | frameSizes.itemAt(i)); |
| 400 | |
| 401 | dstOffset += frameSizes.itemAt(i); |
| 402 | } |
| 403 | |
| 404 | memmove(mBuffer->data(), mBuffer->data() + offset, |
| 405 | mBuffer->size() - offset); |
| 406 | mBuffer->setRange(0, mBuffer->size() - offset); |
| 407 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 408 | if (timeUs >= 0) { |
Andreas Huber | a158746 | 2010-12-15 15:17:42 -0800 | [diff] [blame] | 409 | accessUnit->meta()->setInt64("timeUs", timeUs); |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 410 | } else { |
| 411 | LOGW("no time for AAC access unit"); |
| 412 | } |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 413 | |
| 414 | return accessUnit; |
| 415 | } |
| 416 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 417 | int64_t ElementaryStreamQueue::fetchTimestamp(size_t size) { |
| 418 | int64_t timeUs = -1; |
| 419 | bool first = true; |
| 420 | |
| 421 | while (size > 0) { |
| 422 | CHECK(!mRangeInfos.empty()); |
| 423 | |
| 424 | RangeInfo *info = &*mRangeInfos.begin(); |
| 425 | |
| 426 | if (first) { |
| 427 | timeUs = info->mTimestampUs; |
| 428 | first = false; |
| 429 | } |
| 430 | |
| 431 | if (info->mLength > size) { |
| 432 | info->mLength -= size; |
| 433 | |
| 434 | if (first) { |
| 435 | info->mTimestampUs = -1; |
| 436 | } |
| 437 | |
| 438 | size = 0; |
| 439 | } else { |
| 440 | size -= info->mLength; |
| 441 | |
| 442 | mRangeInfos.erase(mRangeInfos.begin()); |
| 443 | info = NULL; |
| 444 | } |
| 445 | } |
| 446 | |
Andreas Huber | 33d9406 | 2011-10-12 12:14:23 -0700 | [diff] [blame] | 447 | if (timeUs == 0ll) { |
| 448 | LOGV("Returning 0 timestamp"); |
| 449 | } |
| 450 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 451 | return timeUs; |
| 452 | } |
| 453 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 454 | struct NALPosition { |
| 455 | size_t nalOffset; |
| 456 | size_t nalSize; |
| 457 | }; |
| 458 | |
| 459 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnitH264() { |
| 460 | const uint8_t *data = mBuffer->data(); |
| 461 | size_t size = mBuffer->size(); |
| 462 | |
| 463 | Vector<NALPosition> nals; |
| 464 | |
| 465 | size_t totalSize = 0; |
| 466 | |
| 467 | status_t err; |
| 468 | const uint8_t *nalStart; |
| 469 | size_t nalSize; |
| 470 | bool foundSlice = false; |
| 471 | while ((err = getNextNALUnit(&data, &size, &nalStart, &nalSize)) == OK) { |
| 472 | CHECK_GT(nalSize, 0u); |
| 473 | |
| 474 | unsigned nalType = nalStart[0] & 0x1f; |
| 475 | bool flush = false; |
| 476 | |
| 477 | if (nalType == 1 || nalType == 5) { |
| 478 | if (foundSlice) { |
| 479 | ABitReader br(nalStart + 1, nalSize); |
| 480 | unsigned first_mb_in_slice = parseUE(&br); |
| 481 | |
| 482 | if (first_mb_in_slice == 0) { |
| 483 | // This slice starts a new frame. |
| 484 | |
| 485 | flush = true; |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | foundSlice = true; |
| 490 | } else if ((nalType == 9 || nalType == 7) && foundSlice) { |
| 491 | // Access unit delimiter and SPS will be associated with the |
| 492 | // next frame. |
| 493 | |
| 494 | flush = true; |
| 495 | } |
| 496 | |
| 497 | if (flush) { |
| 498 | // The access unit will contain all nal units up to, but excluding |
| 499 | // the current one, separated by 0x00 0x00 0x00 0x01 startcodes. |
| 500 | |
| 501 | size_t auSize = 4 * nals.size() + totalSize; |
| 502 | sp<ABuffer> accessUnit = new ABuffer(auSize); |
| 503 | |
| 504 | #if !LOG_NDEBUG |
| 505 | AString out; |
| 506 | #endif |
| 507 | |
| 508 | size_t dstOffset = 0; |
| 509 | for (size_t i = 0; i < nals.size(); ++i) { |
| 510 | const NALPosition &pos = nals.itemAt(i); |
| 511 | |
| 512 | unsigned nalType = mBuffer->data()[pos.nalOffset] & 0x1f; |
| 513 | |
| 514 | #if !LOG_NDEBUG |
| 515 | char tmp[128]; |
| 516 | sprintf(tmp, "0x%02x", nalType); |
| 517 | if (i > 0) { |
| 518 | out.append(", "); |
| 519 | } |
| 520 | out.append(tmp); |
| 521 | #endif |
| 522 | |
| 523 | memcpy(accessUnit->data() + dstOffset, "\x00\x00\x00\x01", 4); |
| 524 | |
| 525 | memcpy(accessUnit->data() + dstOffset + 4, |
| 526 | mBuffer->data() + pos.nalOffset, |
| 527 | pos.nalSize); |
| 528 | |
| 529 | dstOffset += pos.nalSize + 4; |
| 530 | } |
| 531 | |
| 532 | LOGV("accessUnit contains nal types %s", out.c_str()); |
| 533 | |
| 534 | const NALPosition &pos = nals.itemAt(nals.size() - 1); |
| 535 | size_t nextScan = pos.nalOffset + pos.nalSize; |
| 536 | |
| 537 | memmove(mBuffer->data(), |
| 538 | mBuffer->data() + nextScan, |
| 539 | mBuffer->size() - nextScan); |
| 540 | |
| 541 | mBuffer->setRange(0, mBuffer->size() - nextScan); |
| 542 | |
Andreas Huber | 9c5d62a | 2010-12-15 14:07:50 -0800 | [diff] [blame] | 543 | int64_t timeUs = fetchTimestamp(nextScan); |
| 544 | CHECK_GE(timeUs, 0ll); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 545 | |
Andreas Huber | a158746 | 2010-12-15 15:17:42 -0800 | [diff] [blame] | 546 | accessUnit->meta()->setInt64("timeUs", timeUs); |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 547 | |
| 548 | if (mFormat == NULL) { |
| 549 | mFormat = MakeAVCCodecSpecificData(accessUnit); |
| 550 | } |
| 551 | |
| 552 | return accessUnit; |
| 553 | } |
| 554 | |
| 555 | NALPosition pos; |
| 556 | pos.nalOffset = nalStart - mBuffer->data(); |
| 557 | pos.nalSize = nalSize; |
| 558 | |
| 559 | nals.push(pos); |
| 560 | |
| 561 | totalSize += nalSize; |
| 562 | } |
| 563 | CHECK_EQ(err, (status_t)-EAGAIN); |
| 564 | |
| 565 | return NULL; |
| 566 | } |
| 567 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 568 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnitMPEGAudio() { |
| 569 | const uint8_t *data = mBuffer->data(); |
| 570 | size_t size = mBuffer->size(); |
| 571 | |
| 572 | if (size < 4) { |
| 573 | return NULL; |
| 574 | } |
| 575 | |
| 576 | uint32_t header = U32_AT(data); |
| 577 | |
| 578 | size_t frameSize; |
| 579 | int samplingRate, numChannels, bitrate, numSamples; |
| 580 | CHECK(GetMPEGAudioFrameSize( |
| 581 | header, &frameSize, &samplingRate, &numChannels, |
| 582 | &bitrate, &numSamples)); |
| 583 | |
| 584 | if (size < frameSize) { |
| 585 | return NULL; |
| 586 | } |
| 587 | |
Andreas Huber | bc55495 | 2011-09-08 14:12:44 -0700 | [diff] [blame] | 588 | unsigned layer = 4 - ((header >> 17) & 3); |
| 589 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 590 | sp<ABuffer> accessUnit = new ABuffer(frameSize); |
| 591 | memcpy(accessUnit->data(), data, frameSize); |
| 592 | |
| 593 | memmove(mBuffer->data(), |
| 594 | mBuffer->data() + frameSize, |
| 595 | mBuffer->size() - frameSize); |
| 596 | |
| 597 | mBuffer->setRange(0, mBuffer->size() - frameSize); |
| 598 | |
| 599 | int64_t timeUs = fetchTimestamp(frameSize); |
| 600 | CHECK_GE(timeUs, 0ll); |
| 601 | |
| 602 | accessUnit->meta()->setInt64("timeUs", timeUs); |
| 603 | |
| 604 | if (mFormat == NULL) { |
| 605 | mFormat = new MetaData; |
Andreas Huber | bc55495 | 2011-09-08 14:12:44 -0700 | [diff] [blame] | 606 | |
| 607 | switch (layer) { |
| 608 | case 1: |
| 609 | mFormat->setCString( |
| 610 | kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_I); |
| 611 | break; |
| 612 | case 2: |
| 613 | mFormat->setCString( |
| 614 | kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG_LAYER_II); |
| 615 | break; |
| 616 | case 3: |
| 617 | mFormat->setCString( |
| 618 | kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); |
| 619 | break; |
| 620 | default: |
| 621 | TRESPASS(); |
| 622 | } |
| 623 | |
Andreas Huber | eb2f9c1 | 2011-05-19 08:37:39 -0700 | [diff] [blame] | 624 | mFormat->setInt32(kKeySampleRate, samplingRate); |
| 625 | mFormat->setInt32(kKeyChannelCount, numChannels); |
| 626 | } |
| 627 | |
| 628 | return accessUnit; |
| 629 | } |
| 630 | |
| 631 | static void EncodeSize14(uint8_t **_ptr, size_t size) { |
| 632 | CHECK_LE(size, 0x3fff); |
| 633 | |
| 634 | uint8_t *ptr = *_ptr; |
| 635 | |
| 636 | *ptr++ = 0x80 | (size >> 7); |
| 637 | *ptr++ = size & 0x7f; |
| 638 | |
| 639 | *_ptr = ptr; |
| 640 | } |
| 641 | |
| 642 | static sp<ABuffer> MakeMPEGVideoESDS(const sp<ABuffer> &csd) { |
| 643 | sp<ABuffer> esds = new ABuffer(csd->size() + 25); |
| 644 | |
| 645 | uint8_t *ptr = esds->data(); |
| 646 | *ptr++ = 0x03; |
| 647 | EncodeSize14(&ptr, 22 + csd->size()); |
| 648 | |
| 649 | *ptr++ = 0x00; // ES_ID |
| 650 | *ptr++ = 0x00; |
| 651 | |
| 652 | *ptr++ = 0x00; // streamDependenceFlag, URL_Flag, OCRstreamFlag |
| 653 | |
| 654 | *ptr++ = 0x04; |
| 655 | EncodeSize14(&ptr, 16 + csd->size()); |
| 656 | |
| 657 | *ptr++ = 0x40; // Audio ISO/IEC 14496-3 |
| 658 | |
| 659 | for (size_t i = 0; i < 12; ++i) { |
| 660 | *ptr++ = 0x00; |
| 661 | } |
| 662 | |
| 663 | *ptr++ = 0x05; |
| 664 | EncodeSize14(&ptr, csd->size()); |
| 665 | |
| 666 | memcpy(ptr, csd->data(), csd->size()); |
| 667 | |
| 668 | return esds; |
| 669 | } |
| 670 | |
| 671 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnitMPEGVideo() { |
| 672 | const uint8_t *data = mBuffer->data(); |
| 673 | size_t size = mBuffer->size(); |
| 674 | |
| 675 | bool sawPictureStart = false; |
| 676 | int pprevStartCode = -1; |
| 677 | int prevStartCode = -1; |
| 678 | int currentStartCode = -1; |
| 679 | |
| 680 | size_t offset = 0; |
| 681 | while (offset + 3 < size) { |
| 682 | if (memcmp(&data[offset], "\x00\x00\x01", 3)) { |
| 683 | ++offset; |
| 684 | continue; |
| 685 | } |
| 686 | |
| 687 | pprevStartCode = prevStartCode; |
| 688 | prevStartCode = currentStartCode; |
| 689 | currentStartCode = data[offset + 3]; |
| 690 | |
| 691 | if (currentStartCode == 0xb3 && mFormat == NULL) { |
| 692 | memmove(mBuffer->data(), mBuffer->data() + offset, size - offset); |
| 693 | size -= offset; |
| 694 | (void)fetchTimestamp(offset); |
| 695 | offset = 0; |
| 696 | mBuffer->setRange(0, size); |
| 697 | } |
| 698 | |
| 699 | if ((prevStartCode == 0xb3 && currentStartCode != 0xb5) |
| 700 | || (pprevStartCode == 0xb3 && prevStartCode == 0xb5)) { |
| 701 | // seqHeader without/with extension |
| 702 | |
| 703 | if (mFormat == NULL) { |
| 704 | CHECK_GE(size, 7u); |
| 705 | |
| 706 | unsigned width = |
| 707 | (data[4] << 4) | data[5] >> 4; |
| 708 | |
| 709 | unsigned height = |
| 710 | ((data[5] & 0x0f) << 8) | data[6]; |
| 711 | |
| 712 | mFormat = new MetaData; |
| 713 | mFormat->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG2); |
| 714 | mFormat->setInt32(kKeyWidth, width); |
| 715 | mFormat->setInt32(kKeyHeight, height); |
| 716 | |
| 717 | LOGI("found MPEG2 video codec config (%d x %d)", width, height); |
| 718 | |
| 719 | sp<ABuffer> csd = new ABuffer(offset); |
| 720 | memcpy(csd->data(), data, offset); |
| 721 | |
| 722 | memmove(mBuffer->data(), |
| 723 | mBuffer->data() + offset, |
| 724 | mBuffer->size() - offset); |
| 725 | |
| 726 | mBuffer->setRange(0, mBuffer->size() - offset); |
| 727 | size -= offset; |
| 728 | (void)fetchTimestamp(offset); |
| 729 | offset = 0; |
| 730 | |
| 731 | // hexdump(csd->data(), csd->size()); |
| 732 | |
| 733 | sp<ABuffer> esds = MakeMPEGVideoESDS(csd); |
| 734 | mFormat->setData( |
| 735 | kKeyESDS, kTypeESDS, esds->data(), esds->size()); |
| 736 | |
| 737 | return NULL; |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | if (mFormat != NULL && currentStartCode == 0x00) { |
| 742 | // Picture start |
| 743 | |
| 744 | if (!sawPictureStart) { |
| 745 | sawPictureStart = true; |
| 746 | } else { |
| 747 | sp<ABuffer> accessUnit = new ABuffer(offset); |
| 748 | memcpy(accessUnit->data(), data, offset); |
| 749 | |
| 750 | memmove(mBuffer->data(), |
| 751 | mBuffer->data() + offset, |
| 752 | mBuffer->size() - offset); |
| 753 | |
| 754 | mBuffer->setRange(0, mBuffer->size() - offset); |
| 755 | |
| 756 | int64_t timeUs = fetchTimestamp(offset); |
| 757 | CHECK_GE(timeUs, 0ll); |
| 758 | |
| 759 | offset = 0; |
| 760 | |
| 761 | accessUnit->meta()->setInt64("timeUs", timeUs); |
| 762 | |
| 763 | LOGV("returning MPEG video access unit at time %lld us", |
| 764 | timeUs); |
| 765 | |
| 766 | // hexdump(accessUnit->data(), accessUnit->size()); |
| 767 | |
| 768 | return accessUnit; |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | ++offset; |
| 773 | } |
| 774 | |
| 775 | return NULL; |
| 776 | } |
| 777 | |
| 778 | static ssize_t getNextChunkSize( |
| 779 | const uint8_t *data, size_t size) { |
| 780 | static const char kStartCode[] = "\x00\x00\x01"; |
| 781 | |
| 782 | if (size < 3) { |
| 783 | return -EAGAIN; |
| 784 | } |
| 785 | |
| 786 | if (memcmp(kStartCode, data, 3)) { |
| 787 | TRESPASS(); |
| 788 | } |
| 789 | |
| 790 | size_t offset = 3; |
| 791 | while (offset + 2 < size) { |
| 792 | if (!memcmp(&data[offset], kStartCode, 3)) { |
| 793 | return offset; |
| 794 | } |
| 795 | |
| 796 | ++offset; |
| 797 | } |
| 798 | |
| 799 | return -EAGAIN; |
| 800 | } |
| 801 | |
| 802 | sp<ABuffer> ElementaryStreamQueue::dequeueAccessUnitMPEG4Video() { |
| 803 | uint8_t *data = mBuffer->data(); |
| 804 | size_t size = mBuffer->size(); |
| 805 | |
| 806 | enum { |
| 807 | SKIP_TO_VISUAL_OBJECT_SEQ_START, |
| 808 | EXPECT_VISUAL_OBJECT_START, |
| 809 | EXPECT_VO_START, |
| 810 | EXPECT_VOL_START, |
| 811 | WAIT_FOR_VOP_START, |
| 812 | SKIP_TO_VOP_START, |
| 813 | |
| 814 | } state; |
| 815 | |
| 816 | if (mFormat == NULL) { |
| 817 | state = SKIP_TO_VISUAL_OBJECT_SEQ_START; |
| 818 | } else { |
| 819 | state = SKIP_TO_VOP_START; |
| 820 | } |
| 821 | |
| 822 | int32_t width = -1, height = -1; |
| 823 | |
| 824 | size_t offset = 0; |
| 825 | ssize_t chunkSize; |
| 826 | while ((chunkSize = getNextChunkSize( |
| 827 | &data[offset], size - offset)) > 0) { |
| 828 | bool discard = false; |
| 829 | |
| 830 | unsigned chunkType = data[offset + 3]; |
| 831 | |
| 832 | switch (state) { |
| 833 | case SKIP_TO_VISUAL_OBJECT_SEQ_START: |
| 834 | { |
| 835 | if (chunkType == 0xb0) { |
| 836 | // Discard anything before this marker. |
| 837 | |
| 838 | state = EXPECT_VISUAL_OBJECT_START; |
| 839 | } else { |
| 840 | discard = true; |
| 841 | } |
| 842 | break; |
| 843 | } |
| 844 | |
| 845 | case EXPECT_VISUAL_OBJECT_START: |
| 846 | { |
| 847 | CHECK_EQ(chunkType, 0xb5); |
| 848 | state = EXPECT_VO_START; |
| 849 | break; |
| 850 | } |
| 851 | |
| 852 | case EXPECT_VO_START: |
| 853 | { |
| 854 | CHECK_LE(chunkType, 0x1f); |
| 855 | state = EXPECT_VOL_START; |
| 856 | break; |
| 857 | } |
| 858 | |
| 859 | case EXPECT_VOL_START: |
| 860 | { |
| 861 | CHECK((chunkType & 0xf0) == 0x20); |
| 862 | |
| 863 | CHECK(ExtractDimensionsFromVOLHeader( |
| 864 | &data[offset], chunkSize, |
| 865 | &width, &height)); |
| 866 | |
| 867 | state = WAIT_FOR_VOP_START; |
| 868 | break; |
| 869 | } |
| 870 | |
| 871 | case WAIT_FOR_VOP_START: |
| 872 | { |
| 873 | if (chunkType == 0xb3 || chunkType == 0xb6) { |
| 874 | // group of VOP or VOP start. |
| 875 | |
| 876 | mFormat = new MetaData; |
| 877 | mFormat->setCString( |
| 878 | kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4); |
| 879 | |
| 880 | mFormat->setInt32(kKeyWidth, width); |
| 881 | mFormat->setInt32(kKeyHeight, height); |
| 882 | |
| 883 | LOGI("found MPEG4 video codec config (%d x %d)", |
| 884 | width, height); |
| 885 | |
| 886 | sp<ABuffer> csd = new ABuffer(offset); |
| 887 | memcpy(csd->data(), data, offset); |
| 888 | |
| 889 | // hexdump(csd->data(), csd->size()); |
| 890 | |
| 891 | sp<ABuffer> esds = MakeMPEGVideoESDS(csd); |
| 892 | mFormat->setData( |
| 893 | kKeyESDS, kTypeESDS, |
| 894 | esds->data(), esds->size()); |
| 895 | |
| 896 | discard = true; |
| 897 | state = SKIP_TO_VOP_START; |
| 898 | } |
| 899 | |
| 900 | break; |
| 901 | } |
| 902 | |
| 903 | case SKIP_TO_VOP_START: |
| 904 | { |
| 905 | if (chunkType == 0xb6) { |
| 906 | offset += chunkSize; |
| 907 | |
| 908 | sp<ABuffer> accessUnit = new ABuffer(offset); |
| 909 | memcpy(accessUnit->data(), data, offset); |
| 910 | |
| 911 | memmove(data, &data[offset], size - offset); |
| 912 | size -= offset; |
| 913 | mBuffer->setRange(0, size); |
| 914 | |
| 915 | int64_t timeUs = fetchTimestamp(offset); |
| 916 | CHECK_GE(timeUs, 0ll); |
| 917 | |
| 918 | offset = 0; |
| 919 | |
| 920 | accessUnit->meta()->setInt64("timeUs", timeUs); |
| 921 | |
| 922 | LOGV("returning MPEG4 video access unit at time %lld us", |
| 923 | timeUs); |
| 924 | |
| 925 | // hexdump(accessUnit->data(), accessUnit->size()); |
| 926 | |
| 927 | return accessUnit; |
| 928 | } else if (chunkType != 0xb3) { |
| 929 | offset += chunkSize; |
| 930 | discard = true; |
| 931 | } |
| 932 | |
| 933 | break; |
| 934 | } |
| 935 | |
| 936 | default: |
| 937 | TRESPASS(); |
| 938 | } |
| 939 | |
| 940 | if (discard) { |
| 941 | (void)fetchTimestamp(offset); |
| 942 | memmove(data, &data[offset], size - offset); |
| 943 | size -= offset; |
| 944 | offset = 0; |
| 945 | mBuffer->setRange(0, size); |
| 946 | } else { |
| 947 | offset += chunkSize; |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | return NULL; |
| 952 | } |
| 953 | |
Andreas Huber | b72c7e3 | 2010-10-01 10:51:41 -0700 | [diff] [blame] | 954 | } // namespace android |