Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -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 "OggExtractor" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "include/OggExtractor.h" |
| 22 | |
| 23 | #include <cutils/properties.h> |
James Dong | f1d5aa1 | 2012-02-06 23:46:37 -0800 | [diff] [blame] | 24 | #include <media/stagefright/foundation/ADebug.h> |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 25 | #include <media/stagefright/DataSource.h> |
| 26 | #include <media/stagefright/MediaBuffer.h> |
| 27 | #include <media/stagefright/MediaBufferGroup.h> |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 28 | #include <media/stagefright/MediaDefs.h> |
| 29 | #include <media/stagefright/MediaErrors.h> |
| 30 | #include <media/stagefright/MediaSource.h> |
| 31 | #include <media/stagefright/MetaData.h> |
| 32 | #include <media/stagefright/Utils.h> |
| 33 | #include <utils/String8.h> |
| 34 | |
| 35 | extern "C" { |
| 36 | #include <Tremolo/codec_internal.h> |
| 37 | |
| 38 | int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb); |
| 39 | int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb); |
| 40 | int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb); |
| 41 | } |
| 42 | |
| 43 | namespace android { |
| 44 | |
| 45 | struct OggSource : public MediaSource { |
| 46 | OggSource(const sp<OggExtractor> &extractor); |
| 47 | |
| 48 | virtual sp<MetaData> getFormat(); |
| 49 | |
| 50 | virtual status_t start(MetaData *params = NULL); |
| 51 | virtual status_t stop(); |
| 52 | |
| 53 | virtual status_t read( |
| 54 | MediaBuffer **buffer, const ReadOptions *options = NULL); |
| 55 | |
| 56 | protected: |
| 57 | virtual ~OggSource(); |
| 58 | |
| 59 | private: |
| 60 | sp<OggExtractor> mExtractor; |
| 61 | bool mStarted; |
| 62 | |
| 63 | OggSource(const OggSource &); |
| 64 | OggSource &operator=(const OggSource &); |
| 65 | }; |
| 66 | |
| 67 | struct MyVorbisExtractor { |
| 68 | MyVorbisExtractor(const sp<DataSource> &source); |
| 69 | virtual ~MyVorbisExtractor(); |
| 70 | |
| 71 | sp<MetaData> getFormat() const; |
| 72 | |
| 73 | // Returns an approximate bitrate in bits per second. |
| 74 | uint64_t approxBitrate(); |
| 75 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 76 | status_t seekToTime(int64_t timeUs); |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 77 | status_t seekToOffset(off64_t offset); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 78 | status_t readNextPacket(MediaBuffer **buffer); |
| 79 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 80 | status_t init(); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 81 | |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 82 | sp<MetaData> getFileMetaData() { return mFileMeta; } |
| 83 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 84 | private: |
| 85 | struct Page { |
| 86 | uint64_t mGranulePosition; |
| 87 | uint32_t mSerialNo; |
| 88 | uint32_t mPageNo; |
| 89 | uint8_t mFlags; |
| 90 | uint8_t mNumSegments; |
| 91 | uint8_t mLace[255]; |
| 92 | }; |
| 93 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 94 | struct TOCEntry { |
| 95 | off64_t mPageOffset; |
| 96 | int64_t mTimeUs; |
| 97 | }; |
| 98 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 99 | sp<DataSource> mSource; |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 100 | off64_t mOffset; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 101 | Page mCurrentPage; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 102 | uint64_t mPrevGranulePosition; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 103 | size_t mCurrentPageSize; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 104 | bool mFirstPacketInPage; |
| 105 | uint64_t mCurrentPageSamples; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 106 | size_t mNextLaceIndex; |
| 107 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 108 | off64_t mFirstDataOffset; |
Andreas Huber | 96f52cd | 2010-05-11 10:11:55 -0700 | [diff] [blame] | 109 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 110 | vorbis_info mVi; |
| 111 | vorbis_comment mVc; |
| 112 | |
| 113 | sp<MetaData> mMeta; |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 114 | sp<MetaData> mFileMeta; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 115 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 116 | Vector<TOCEntry> mTableOfContents; |
| 117 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 118 | ssize_t readPage(off64_t offset, Page *page); |
| 119 | status_t findNextPage(off64_t startOffset, off64_t *pageOffset); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 120 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 121 | status_t verifyHeader( |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 122 | MediaBuffer *buffer, uint8_t type); |
| 123 | |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 124 | void parseFileMetaData(); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 125 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 126 | status_t findPrevGranulePosition(off64_t pageOffset, uint64_t *granulePos); |
| 127 | |
| 128 | void buildTableOfContents(); |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 129 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 130 | MyVorbisExtractor(const MyVorbisExtractor &); |
| 131 | MyVorbisExtractor &operator=(const MyVorbisExtractor &); |
| 132 | }; |
| 133 | |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 134 | static void extractAlbumArt( |
| 135 | const sp<MetaData> &fileMeta, const void *data, size_t size); |
| 136 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 137 | //////////////////////////////////////////////////////////////////////////////// |
| 138 | |
| 139 | OggSource::OggSource(const sp<OggExtractor> &extractor) |
| 140 | : mExtractor(extractor), |
| 141 | mStarted(false) { |
| 142 | } |
| 143 | |
| 144 | OggSource::~OggSource() { |
| 145 | if (mStarted) { |
| 146 | stop(); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | sp<MetaData> OggSource::getFormat() { |
| 151 | return mExtractor->mImpl->getFormat(); |
| 152 | } |
| 153 | |
| 154 | status_t OggSource::start(MetaData *params) { |
| 155 | if (mStarted) { |
| 156 | return INVALID_OPERATION; |
| 157 | } |
| 158 | |
| 159 | mStarted = true; |
| 160 | |
| 161 | return OK; |
| 162 | } |
| 163 | |
| 164 | status_t OggSource::stop() { |
| 165 | mStarted = false; |
| 166 | |
| 167 | return OK; |
| 168 | } |
| 169 | |
| 170 | status_t OggSource::read( |
| 171 | MediaBuffer **out, const ReadOptions *options) { |
| 172 | *out = NULL; |
| 173 | |
| 174 | int64_t seekTimeUs; |
Andreas Huber | abd1f4f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 175 | ReadOptions::SeekMode mode; |
| 176 | if (options && options->getSeekTo(&seekTimeUs, &mode)) { |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 177 | if (mExtractor->mImpl->seekToTime(seekTimeUs) != OK) { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 178 | return ERROR_END_OF_STREAM; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | MediaBuffer *packet; |
| 183 | status_t err = mExtractor->mImpl->readNextPacket(&packet); |
| 184 | |
| 185 | if (err != OK) { |
| 186 | return err; |
| 187 | } |
| 188 | |
| 189 | #if 0 |
| 190 | int64_t timeUs; |
| 191 | if (packet->meta_data()->findInt64(kKeyTime, &timeUs)) { |
Steve Block | df64d15 | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 192 | ALOGI("found time = %lld us", timeUs); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 193 | } else { |
Steve Block | df64d15 | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 194 | ALOGI("NO time"); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 195 | } |
| 196 | #endif |
| 197 | |
Andreas Huber | 8bf59e7 | 2010-08-06 14:13:10 -0700 | [diff] [blame] | 198 | packet->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| 199 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 200 | *out = packet; |
| 201 | |
| 202 | return OK; |
| 203 | } |
| 204 | |
| 205 | //////////////////////////////////////////////////////////////////////////////// |
| 206 | |
| 207 | MyVorbisExtractor::MyVorbisExtractor(const sp<DataSource> &source) |
| 208 | : mSource(source), |
| 209 | mOffset(0), |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 210 | mPrevGranulePosition(0), |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 211 | mCurrentPageSize(0), |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 212 | mFirstPacketInPage(true), |
| 213 | mCurrentPageSamples(0), |
Andreas Huber | 96f52cd | 2010-05-11 10:11:55 -0700 | [diff] [blame] | 214 | mNextLaceIndex(0), |
| 215 | mFirstDataOffset(-1) { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 216 | mCurrentPage.mNumSegments = 0; |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 217 | |
| 218 | vorbis_info_init(&mVi); |
| 219 | vorbis_comment_init(&mVc); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | MyVorbisExtractor::~MyVorbisExtractor() { |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 223 | vorbis_comment_clear(&mVc); |
| 224 | vorbis_info_clear(&mVi); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | sp<MetaData> MyVorbisExtractor::getFormat() const { |
| 228 | return mMeta; |
| 229 | } |
| 230 | |
| 231 | status_t MyVorbisExtractor::findNextPage( |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 232 | off64_t startOffset, off64_t *pageOffset) { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 233 | *pageOffset = startOffset; |
| 234 | |
| 235 | for (;;) { |
| 236 | char signature[4]; |
| 237 | ssize_t n = mSource->readAt(*pageOffset, &signature, 4); |
| 238 | |
| 239 | if (n < 4) { |
| 240 | *pageOffset = 0; |
| 241 | |
| 242 | return (n < 0) ? n : (status_t)ERROR_END_OF_STREAM; |
| 243 | } |
| 244 | |
| 245 | if (!memcmp(signature, "OggS", 4)) { |
| 246 | if (*pageOffset > startOffset) { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 247 | ALOGV("skipped %lld bytes of junk to reach next frame", |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 248 | *pageOffset - startOffset); |
| 249 | } |
| 250 | |
| 251 | return OK; |
| 252 | } |
| 253 | |
| 254 | ++*pageOffset; |
| 255 | } |
| 256 | } |
| 257 | |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 258 | // Given the offset of the "current" page, find the page immediately preceding |
| 259 | // it (if any) and return its granule position. |
| 260 | // To do this we back up from the "current" page's offset until we find any |
| 261 | // page preceding it and then scan forward to just before the current page. |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 262 | status_t MyVorbisExtractor::findPrevGranulePosition( |
| 263 | off64_t pageOffset, uint64_t *granulePos) { |
| 264 | *granulePos = 0; |
| 265 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 266 | off64_t prevPageOffset = 0; |
| 267 | off64_t prevGuess = pageOffset; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 268 | for (;;) { |
| 269 | if (prevGuess >= 5000) { |
| 270 | prevGuess -= 5000; |
| 271 | } else { |
| 272 | prevGuess = 0; |
| 273 | } |
| 274 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 275 | ALOGV("backing up %lld bytes", pageOffset - prevGuess); |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 276 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 277 | status_t err = findNextPage(prevGuess, &prevPageOffset); |
| 278 | if (err != OK) { |
| 279 | return err; |
| 280 | } |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 281 | |
| 282 | if (prevPageOffset < pageOffset || prevGuess == 0) { |
| 283 | break; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | if (prevPageOffset == pageOffset) { |
| 288 | // We did not find a page preceding this one. |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 289 | return UNKNOWN_ERROR; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 290 | } |
| 291 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 292 | ALOGV("prevPageOffset at %lld, pageOffset at %lld", |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 293 | prevPageOffset, pageOffset); |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 294 | |
| 295 | for (;;) { |
| 296 | Page prevPage; |
| 297 | ssize_t n = readPage(prevPageOffset, &prevPage); |
| 298 | |
| 299 | if (n <= 0) { |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 300 | return (status_t)n; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | prevPageOffset += n; |
| 304 | |
| 305 | if (prevPageOffset == pageOffset) { |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 306 | *granulePos = prevPage.mGranulePosition; |
| 307 | return OK; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 312 | status_t MyVorbisExtractor::seekToTime(int64_t timeUs) { |
| 313 | if (mTableOfContents.isEmpty()) { |
| 314 | // Perform approximate seeking based on avg. bitrate. |
| 315 | |
| 316 | off64_t pos = timeUs * approxBitrate() / 8000000ll; |
| 317 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 318 | ALOGV("seeking to offset %lld", pos); |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 319 | return seekToOffset(pos); |
| 320 | } |
| 321 | |
| 322 | size_t left = 0; |
| 323 | size_t right = mTableOfContents.size(); |
| 324 | while (left < right) { |
| 325 | size_t center = left / 2 + right / 2 + (left & right & 1); |
| 326 | |
| 327 | const TOCEntry &entry = mTableOfContents.itemAt(center); |
| 328 | |
| 329 | if (timeUs < entry.mTimeUs) { |
| 330 | right = center; |
| 331 | } else if (timeUs > entry.mTimeUs) { |
| 332 | left = center + 1; |
| 333 | } else { |
| 334 | left = right = center; |
| 335 | break; |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | const TOCEntry &entry = mTableOfContents.itemAt(left); |
| 340 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 341 | ALOGV("seeking to entry %d / %d at offset %lld", |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 342 | left, mTableOfContents.size(), entry.mPageOffset); |
| 343 | |
| 344 | return seekToOffset(entry.mPageOffset); |
| 345 | } |
| 346 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 347 | status_t MyVorbisExtractor::seekToOffset(off64_t offset) { |
Andreas Huber | 96f52cd | 2010-05-11 10:11:55 -0700 | [diff] [blame] | 348 | if (mFirstDataOffset >= 0 && offset < mFirstDataOffset) { |
| 349 | // Once we know where the actual audio data starts (past the headers) |
| 350 | // don't ever seek to anywhere before that. |
| 351 | offset = mFirstDataOffset; |
| 352 | } |
| 353 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 354 | off64_t pageOffset; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 355 | status_t err = findNextPage(offset, &pageOffset); |
| 356 | |
| 357 | if (err != OK) { |
| 358 | return err; |
| 359 | } |
| 360 | |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 361 | // We found the page we wanted to seek to, but we'll also need |
| 362 | // the page preceding it to determine how many valid samples are on |
| 363 | // this page. |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 364 | findPrevGranulePosition(pageOffset, &mPrevGranulePosition); |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 365 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 366 | mOffset = pageOffset; |
| 367 | |
| 368 | mCurrentPageSize = 0; |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 369 | mFirstPacketInPage = true; |
| 370 | mCurrentPageSamples = 0; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 371 | mCurrentPage.mNumSegments = 0; |
| 372 | mNextLaceIndex = 0; |
| 373 | |
| 374 | // XXX what if new page continues packet from last??? |
| 375 | |
| 376 | return OK; |
| 377 | } |
| 378 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 379 | ssize_t MyVorbisExtractor::readPage(off64_t offset, Page *page) { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 380 | uint8_t header[27]; |
Andreas Huber | df659ac | 2011-05-10 16:14:51 -0700 | [diff] [blame] | 381 | ssize_t n; |
| 382 | if ((n = mSource->readAt(offset, header, sizeof(header))) |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 383 | < (ssize_t)sizeof(header)) { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 384 | ALOGV("failed to read %d bytes at offset 0x%016llx, got %ld bytes", |
Andreas Huber | df659ac | 2011-05-10 16:14:51 -0700 | [diff] [blame] | 385 | sizeof(header), offset, n); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 386 | |
Andreas Huber | df659ac | 2011-05-10 16:14:51 -0700 | [diff] [blame] | 387 | if (n < 0) { |
| 388 | return n; |
| 389 | } else if (n == 0) { |
| 390 | return ERROR_END_OF_STREAM; |
| 391 | } else { |
| 392 | return ERROR_IO; |
| 393 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | if (memcmp(header, "OggS", 4)) { |
| 397 | return ERROR_MALFORMED; |
| 398 | } |
| 399 | |
| 400 | if (header[4] != 0) { |
| 401 | // Wrong version. |
| 402 | |
| 403 | return ERROR_UNSUPPORTED; |
| 404 | } |
| 405 | |
| 406 | page->mFlags = header[5]; |
| 407 | |
| 408 | if (page->mFlags & ~7) { |
| 409 | // Only bits 0-2 are defined in version 0. |
| 410 | return ERROR_MALFORMED; |
| 411 | } |
| 412 | |
| 413 | page->mGranulePosition = U64LE_AT(&header[6]); |
| 414 | |
| 415 | #if 0 |
| 416 | printf("granulePosition = %llu (0x%llx)\n", |
| 417 | page->mGranulePosition, page->mGranulePosition); |
| 418 | #endif |
| 419 | |
| 420 | page->mSerialNo = U32LE_AT(&header[14]); |
| 421 | page->mPageNo = U32LE_AT(&header[18]); |
| 422 | |
| 423 | page->mNumSegments = header[26]; |
| 424 | if (mSource->readAt( |
| 425 | offset + sizeof(header), page->mLace, page->mNumSegments) |
| 426 | < (ssize_t)page->mNumSegments) { |
| 427 | return ERROR_IO; |
| 428 | } |
| 429 | |
| 430 | size_t totalSize = 0;; |
| 431 | for (size_t i = 0; i < page->mNumSegments; ++i) { |
| 432 | totalSize += page->mLace[i]; |
| 433 | } |
| 434 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 435 | #if 0 |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 436 | String8 tmp; |
| 437 | for (size_t i = 0; i < page->mNumSegments; ++i) { |
| 438 | char x[32]; |
| 439 | sprintf(x, "%s%u", i > 0 ? ", " : "", (unsigned)page->mLace[i]); |
| 440 | |
| 441 | tmp.append(x); |
| 442 | } |
| 443 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 444 | ALOGV("%c %s", page->mFlags & 1 ? '+' : ' ', tmp.string()); |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 445 | #endif |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 446 | |
| 447 | return sizeof(header) + page->mNumSegments + totalSize; |
| 448 | } |
| 449 | |
| 450 | status_t MyVorbisExtractor::readNextPacket(MediaBuffer **out) { |
| 451 | *out = NULL; |
| 452 | |
| 453 | MediaBuffer *buffer = NULL; |
| 454 | int64_t timeUs = -1; |
| 455 | |
| 456 | for (;;) { |
| 457 | size_t i; |
| 458 | size_t packetSize = 0; |
| 459 | bool gotFullPacket = false; |
| 460 | for (i = mNextLaceIndex; i < mCurrentPage.mNumSegments; ++i) { |
| 461 | uint8_t lace = mCurrentPage.mLace[i]; |
| 462 | |
| 463 | packetSize += lace; |
| 464 | |
| 465 | if (lace < 255) { |
| 466 | gotFullPacket = true; |
| 467 | ++i; |
| 468 | break; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | if (mNextLaceIndex < mCurrentPage.mNumSegments) { |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 473 | off64_t dataOffset = mOffset + 27 + mCurrentPage.mNumSegments; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 474 | for (size_t j = 0; j < mNextLaceIndex; ++j) { |
| 475 | dataOffset += mCurrentPage.mLace[j]; |
| 476 | } |
| 477 | |
| 478 | size_t fullSize = packetSize; |
| 479 | if (buffer != NULL) { |
| 480 | fullSize += buffer->range_length(); |
| 481 | } |
| 482 | MediaBuffer *tmp = new MediaBuffer(fullSize); |
| 483 | if (buffer != NULL) { |
| 484 | memcpy(tmp->data(), buffer->data(), buffer->range_length()); |
| 485 | tmp->set_range(0, buffer->range_length()); |
| 486 | buffer->release(); |
Andreas Huber | ecaccb9 | 2010-08-05 10:00:10 -0700 | [diff] [blame] | 487 | } else { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 488 | // XXX Not only is this not technically the correct time for |
| 489 | // this packet, we also stamp every packet in this page |
| 490 | // with the same time. This needs fixing later. |
Andreas Huber | ecaccb9 | 2010-08-05 10:00:10 -0700 | [diff] [blame] | 491 | |
| 492 | if (mVi.rate) { |
| 493 | // Rate may not have been initialized yet if we're currently |
| 494 | // reading the configuration packets... |
| 495 | // Fortunately, the timestamp doesn't matter for those. |
| 496 | timeUs = mCurrentPage.mGranulePosition * 1000000ll / mVi.rate; |
| 497 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 498 | tmp->set_range(0, 0); |
| 499 | } |
| 500 | buffer = tmp; |
| 501 | |
| 502 | ssize_t n = mSource->readAt( |
| 503 | dataOffset, |
| 504 | (uint8_t *)buffer->data() + buffer->range_length(), |
| 505 | packetSize); |
| 506 | |
| 507 | if (n < (ssize_t)packetSize) { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 508 | ALOGV("failed to read %d bytes at 0x%016llx, got %ld bytes", |
Andreas Huber | df659ac | 2011-05-10 16:14:51 -0700 | [diff] [blame] | 509 | packetSize, dataOffset, n); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 510 | return ERROR_IO; |
| 511 | } |
| 512 | |
| 513 | buffer->set_range(0, fullSize); |
| 514 | |
| 515 | mNextLaceIndex = i; |
| 516 | |
| 517 | if (gotFullPacket) { |
| 518 | // We've just read the entire packet. |
| 519 | |
| 520 | if (timeUs >= 0) { |
| 521 | buffer->meta_data()->setInt64(kKeyTime, timeUs); |
| 522 | } |
| 523 | |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 524 | if (mFirstPacketInPage) { |
| 525 | buffer->meta_data()->setInt32( |
| 526 | kKeyValidSamples, mCurrentPageSamples); |
| 527 | mFirstPacketInPage = false; |
| 528 | } |
| 529 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 530 | *out = buffer; |
| 531 | |
| 532 | return OK; |
| 533 | } |
| 534 | |
| 535 | // fall through, the buffer now contains the start of the packet. |
| 536 | } |
| 537 | |
| 538 | CHECK_EQ(mNextLaceIndex, mCurrentPage.mNumSegments); |
| 539 | |
| 540 | mOffset += mCurrentPageSize; |
| 541 | ssize_t n = readPage(mOffset, &mCurrentPage); |
| 542 | |
| 543 | if (n <= 0) { |
| 544 | if (buffer) { |
| 545 | buffer->release(); |
| 546 | buffer = NULL; |
| 547 | } |
| 548 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 549 | ALOGV("readPage returned %ld", n); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 550 | |
| 551 | return n < 0 ? n : (status_t)ERROR_END_OF_STREAM; |
| 552 | } |
| 553 | |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 554 | mCurrentPageSamples = |
| 555 | mCurrentPage.mGranulePosition - mPrevGranulePosition; |
| 556 | mFirstPacketInPage = true; |
| 557 | |
| 558 | mPrevGranulePosition = mCurrentPage.mGranulePosition; |
| 559 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 560 | mCurrentPageSize = n; |
| 561 | mNextLaceIndex = 0; |
| 562 | |
| 563 | if (buffer != NULL) { |
| 564 | if ((mCurrentPage.mFlags & 1) == 0) { |
| 565 | // This page does not continue the packet, i.e. the packet |
| 566 | // is already complete. |
| 567 | |
| 568 | if (timeUs >= 0) { |
| 569 | buffer->meta_data()->setInt64(kKeyTime, timeUs); |
| 570 | } |
| 571 | |
Andreas Huber | db62222 | 2010-09-28 09:16:21 -0700 | [diff] [blame] | 572 | buffer->meta_data()->setInt32( |
| 573 | kKeyValidSamples, mCurrentPageSamples); |
| 574 | mFirstPacketInPage = false; |
| 575 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 576 | *out = buffer; |
| 577 | |
| 578 | return OK; |
| 579 | } |
| 580 | } |
| 581 | } |
| 582 | } |
| 583 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 584 | status_t MyVorbisExtractor::init() { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 585 | mMeta = new MetaData; |
| 586 | mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_VORBIS); |
| 587 | |
| 588 | MediaBuffer *packet; |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 589 | status_t err; |
| 590 | if ((err = readNextPacket(&packet)) != OK) { |
| 591 | return err; |
| 592 | } |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 593 | ALOGV("read packet of size %d\n", packet->range_length()); |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 594 | err = verifyHeader(packet, 1); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 595 | packet->release(); |
| 596 | packet = NULL; |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 597 | if (err != OK) { |
| 598 | return err; |
| 599 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 600 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 601 | if ((err = readNextPacket(&packet)) != OK) { |
| 602 | return err; |
| 603 | } |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 604 | ALOGV("read packet of size %d\n", packet->range_length()); |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 605 | err = verifyHeader(packet, 3); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 606 | packet->release(); |
| 607 | packet = NULL; |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 608 | if (err != OK) { |
| 609 | return err; |
| 610 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 611 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 612 | if ((err = readNextPacket(&packet)) != OK) { |
| 613 | return err; |
| 614 | } |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 615 | ALOGV("read packet of size %d\n", packet->range_length()); |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 616 | err = verifyHeader(packet, 5); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 617 | packet->release(); |
| 618 | packet = NULL; |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 619 | if (err != OK) { |
| 620 | return err; |
| 621 | } |
Andreas Huber | 96f52cd | 2010-05-11 10:11:55 -0700 | [diff] [blame] | 622 | |
| 623 | mFirstDataOffset = mOffset + mCurrentPageSize; |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 624 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 625 | off64_t size; |
| 626 | uint64_t lastGranulePosition; |
| 627 | if (!(mSource->flags() & DataSource::kIsCachingDataSource) |
| 628 | && mSource->getSize(&size) == OK |
| 629 | && findPrevGranulePosition(size, &lastGranulePosition) == OK) { |
| 630 | // Let's assume it's cheap to seek to the end. |
| 631 | // The granule position of the final page in the stream will |
| 632 | // give us the exact duration of the content, something that |
| 633 | // we can only approximate using avg. bitrate if seeking to |
| 634 | // the end is too expensive or impossible (live streaming). |
| 635 | |
| 636 | int64_t durationUs = lastGranulePosition * 1000000ll / mVi.rate; |
| 637 | |
| 638 | mMeta->setInt64(kKeyDuration, durationUs); |
| 639 | |
| 640 | buildTableOfContents(); |
| 641 | } |
| 642 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 643 | return OK; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 644 | } |
| 645 | |
Andreas Huber | 3fd91ba | 2011-03-02 11:10:10 -0800 | [diff] [blame] | 646 | void MyVorbisExtractor::buildTableOfContents() { |
| 647 | off64_t offset = mFirstDataOffset; |
| 648 | Page page; |
| 649 | ssize_t pageSize; |
| 650 | while ((pageSize = readPage(offset, &page)) > 0) { |
| 651 | mTableOfContents.push(); |
| 652 | |
| 653 | TOCEntry &entry = |
| 654 | mTableOfContents.editItemAt(mTableOfContents.size() - 1); |
| 655 | |
| 656 | entry.mPageOffset = offset; |
| 657 | entry.mTimeUs = page.mGranulePosition * 1000000ll / mVi.rate; |
| 658 | |
| 659 | offset += (size_t)pageSize; |
| 660 | } |
| 661 | |
| 662 | // Limit the maximum amount of RAM we spend on the table of contents, |
| 663 | // if necessary thin out the table evenly to trim it down to maximum |
| 664 | // size. |
| 665 | |
| 666 | static const size_t kMaxTOCSize = 8192; |
| 667 | static const size_t kMaxNumTOCEntries = kMaxTOCSize / sizeof(TOCEntry); |
| 668 | |
| 669 | size_t numerator = mTableOfContents.size(); |
| 670 | |
| 671 | if (numerator > kMaxNumTOCEntries) { |
| 672 | size_t denom = numerator - kMaxNumTOCEntries; |
| 673 | |
| 674 | size_t accum = 0; |
| 675 | for (ssize_t i = mTableOfContents.size() - 1; i >= 0; --i) { |
| 676 | accum += denom; |
| 677 | if (accum >= numerator) { |
| 678 | mTableOfContents.removeAt(i); |
| 679 | accum -= numerator; |
| 680 | } |
| 681 | } |
| 682 | } |
| 683 | } |
| 684 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 685 | status_t MyVorbisExtractor::verifyHeader( |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 686 | MediaBuffer *buffer, uint8_t type) { |
| 687 | const uint8_t *data = |
| 688 | (const uint8_t *)buffer->data() + buffer->range_offset(); |
| 689 | |
| 690 | size_t size = buffer->range_length(); |
| 691 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 692 | if (size < 7 || data[0] != type || memcmp(&data[1], "vorbis", 6)) { |
| 693 | return ERROR_MALFORMED; |
| 694 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 695 | |
| 696 | ogg_buffer buf; |
| 697 | buf.data = (uint8_t *)data; |
| 698 | buf.size = size; |
| 699 | buf.refcount = 1; |
| 700 | buf.ptr.owner = NULL; |
| 701 | |
| 702 | ogg_reference ref; |
| 703 | ref.buffer = &buf; |
| 704 | ref.begin = 0; |
| 705 | ref.length = size; |
| 706 | ref.next = NULL; |
| 707 | |
| 708 | oggpack_buffer bits; |
| 709 | oggpack_readinit(&bits, &ref); |
| 710 | |
| 711 | CHECK_EQ(oggpack_read(&bits, 8), type); |
| 712 | for (size_t i = 0; i < 6; ++i) { |
| 713 | oggpack_read(&bits, 8); // skip 'vorbis' |
| 714 | } |
| 715 | |
| 716 | switch (type) { |
| 717 | case 1: |
| 718 | { |
| 719 | CHECK_EQ(0, _vorbis_unpack_info(&mVi, &bits)); |
| 720 | |
| 721 | mMeta->setData(kKeyVorbisInfo, 0, data, size); |
| 722 | mMeta->setInt32(kKeySampleRate, mVi.rate); |
| 723 | mMeta->setInt32(kKeyChannelCount, mVi.channels); |
| 724 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 725 | ALOGV("lower-bitrate = %ld", mVi.bitrate_lower); |
| 726 | ALOGV("upper-bitrate = %ld", mVi.bitrate_upper); |
| 727 | ALOGV("nominal-bitrate = %ld", mVi.bitrate_nominal); |
| 728 | ALOGV("window-bitrate = %ld", mVi.bitrate_window); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 729 | |
James Dong | c7fc37a | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 730 | off64_t size; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 731 | if (mSource->getSize(&size) == OK) { |
| 732 | uint64_t bps = approxBitrate(); |
Dongwon Kang | f9fb139 | 2011-06-17 22:52:19 +0900 | [diff] [blame] | 733 | if (bps != 0) { |
| 734 | mMeta->setInt64(kKeyDuration, size * 8000000ll / bps); |
| 735 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 736 | } |
| 737 | break; |
| 738 | } |
| 739 | |
| 740 | case 3: |
| 741 | { |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 742 | if (0 != _vorbis_unpack_comment(&mVc, &bits)) { |
| 743 | return ERROR_MALFORMED; |
| 744 | } |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 745 | |
| 746 | parseFileMetaData(); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 747 | break; |
| 748 | } |
| 749 | |
| 750 | case 5: |
| 751 | { |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 752 | if (0 != _vorbis_unpack_books(&mVi, &bits)) { |
| 753 | return ERROR_MALFORMED; |
| 754 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 755 | |
| 756 | mMeta->setData(kKeyVorbisBooks, 0, data, size); |
| 757 | break; |
| 758 | } |
| 759 | } |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 760 | |
| 761 | return OK; |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | uint64_t MyVorbisExtractor::approxBitrate() { |
| 765 | if (mVi.bitrate_nominal != 0) { |
| 766 | return mVi.bitrate_nominal; |
| 767 | } |
| 768 | |
| 769 | return (mVi.bitrate_lower + mVi.bitrate_upper) / 2; |
| 770 | } |
| 771 | |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 772 | void MyVorbisExtractor::parseFileMetaData() { |
| 773 | mFileMeta = new MetaData; |
| 774 | mFileMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_OGG); |
| 775 | |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 776 | for (int i = 0; i < mVc.comments; ++i) { |
| 777 | const char *comment = mVc.user_comments[i]; |
| 778 | size_t commentLength = mVc.comment_lengths[i]; |
| 779 | parseVorbisComment(mFileMeta, comment, commentLength); |
Steve Block | df64d15 | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 780 | //ALOGI("comment #%d: '%s'", i + 1, mVc.user_comments[i]); |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 781 | } |
| 782 | } |
| 783 | |
| 784 | void parseVorbisComment( |
| 785 | const sp<MetaData> &fileMeta, const char *comment, size_t commentLength) |
| 786 | { |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 787 | struct { |
| 788 | const char *const mTag; |
| 789 | uint32_t mKey; |
| 790 | } kMap[] = { |
| 791 | { "TITLE", kKeyTitle }, |
| 792 | { "ARTIST", kKeyArtist }, |
Marco Nelissen | 11f8109 | 2011-01-06 11:12:17 -0800 | [diff] [blame] | 793 | { "ALBUMARTIST", kKeyAlbumArtist }, |
| 794 | { "ALBUM ARTIST", kKeyAlbumArtist }, |
| 795 | { "COMPILATION", kKeyCompilation }, |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 796 | { "ALBUM", kKeyAlbum }, |
| 797 | { "COMPOSER", kKeyComposer }, |
| 798 | { "GENRE", kKeyGenre }, |
| 799 | { "AUTHOR", kKeyAuthor }, |
| 800 | { "TRACKNUMBER", kKeyCDTrackNumber }, |
| 801 | { "DISCNUMBER", kKeyDiscNumber }, |
| 802 | { "DATE", kKeyDate }, |
| 803 | { "LYRICIST", kKeyWriter }, |
| 804 | { "METADATA_BLOCK_PICTURE", kKeyAlbumArt }, |
Andreas Huber | 8ae49d8 | 2010-09-03 14:09:21 -0700 | [diff] [blame] | 805 | { "ANDROID_LOOP", kKeyAutoLoop }, |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 806 | }; |
| 807 | |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 808 | for (size_t j = 0; j < sizeof(kMap) / sizeof(kMap[0]); ++j) { |
| 809 | size_t tagLen = strlen(kMap[j].mTag); |
| 810 | if (!strncasecmp(kMap[j].mTag, comment, tagLen) |
| 811 | && comment[tagLen] == '=') { |
| 812 | if (kMap[j].mKey == kKeyAlbumArt) { |
| 813 | extractAlbumArt( |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 814 | fileMeta, |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 815 | &comment[tagLen + 1], |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 816 | commentLength - tagLen - 1); |
Andreas Huber | 8ae49d8 | 2010-09-03 14:09:21 -0700 | [diff] [blame] | 817 | } else if (kMap[j].mKey == kKeyAutoLoop) { |
| 818 | if (!strcasecmp(&comment[tagLen + 1], "true")) { |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 819 | fileMeta->setInt32(kKeyAutoLoop, true); |
Andreas Huber | 8ae49d8 | 2010-09-03 14:09:21 -0700 | [diff] [blame] | 820 | } |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 821 | } else { |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 822 | fileMeta->setCString(kMap[j].mKey, &comment[tagLen + 1]); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 823 | } |
| 824 | } |
| 825 | } |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 826 | |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | // The returned buffer should be free()d. |
| 830 | static uint8_t *DecodeBase64(const char *s, size_t size, size_t *outSize) { |
| 831 | *outSize = 0; |
| 832 | |
| 833 | if ((size % 4) != 0) { |
| 834 | return NULL; |
| 835 | } |
| 836 | |
| 837 | size_t n = size; |
| 838 | size_t padding = 0; |
| 839 | if (n >= 1 && s[n - 1] == '=') { |
| 840 | padding = 1; |
| 841 | |
| 842 | if (n >= 2 && s[n - 2] == '=') { |
| 843 | padding = 2; |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | size_t outLen = 3 * size / 4 - padding; |
| 848 | |
| 849 | *outSize = outLen; |
| 850 | |
| 851 | void *buffer = malloc(outLen); |
| 852 | |
| 853 | uint8_t *out = (uint8_t *)buffer; |
| 854 | size_t j = 0; |
| 855 | uint32_t accum = 0; |
| 856 | for (size_t i = 0; i < n; ++i) { |
| 857 | char c = s[i]; |
| 858 | unsigned value; |
| 859 | if (c >= 'A' && c <= 'Z') { |
| 860 | value = c - 'A'; |
| 861 | } else if (c >= 'a' && c <= 'z') { |
| 862 | value = 26 + c - 'a'; |
| 863 | } else if (c >= '0' && c <= '9') { |
| 864 | value = 52 + c - '0'; |
| 865 | } else if (c == '+') { |
| 866 | value = 62; |
| 867 | } else if (c == '/') { |
| 868 | value = 63; |
| 869 | } else if (c != '=') { |
| 870 | return NULL; |
| 871 | } else { |
| 872 | if (i < n - padding) { |
| 873 | return NULL; |
| 874 | } |
| 875 | |
| 876 | value = 0; |
| 877 | } |
| 878 | |
| 879 | accum = (accum << 6) | value; |
| 880 | |
| 881 | if (((i + 1) % 4) == 0) { |
| 882 | out[j++] = (accum >> 16); |
| 883 | |
| 884 | if (j < outLen) { out[j++] = (accum >> 8) & 0xff; } |
| 885 | if (j < outLen) { out[j++] = accum & 0xff; } |
| 886 | |
| 887 | accum = 0; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | return (uint8_t *)buffer; |
| 892 | } |
| 893 | |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 894 | static void extractAlbumArt( |
| 895 | const sp<MetaData> &fileMeta, const void *data, size_t size) { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 896 | ALOGV("extractAlbumArt from '%s'", (const char *)data); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 897 | |
| 898 | size_t flacSize; |
| 899 | uint8_t *flac = DecodeBase64((const char *)data, size, &flacSize); |
| 900 | |
| 901 | if (flac == NULL) { |
Steve Block | 29357bc | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 902 | ALOGE("malformed base64 encoded data."); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 903 | return; |
| 904 | } |
| 905 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 906 | ALOGV("got flac of size %d", flacSize); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 907 | |
| 908 | uint32_t picType; |
| 909 | uint32_t typeLen; |
| 910 | uint32_t descLen; |
| 911 | uint32_t dataLen; |
| 912 | char type[128]; |
| 913 | |
| 914 | if (flacSize < 8) { |
| 915 | goto exit; |
| 916 | } |
| 917 | |
| 918 | picType = U32_AT(flac); |
| 919 | |
| 920 | if (picType != 3) { |
| 921 | // This is not a front cover. |
| 922 | goto exit; |
| 923 | } |
| 924 | |
| 925 | typeLen = U32_AT(&flac[4]); |
| 926 | if (typeLen + 1 > sizeof(type)) { |
| 927 | goto exit; |
| 928 | } |
| 929 | |
| 930 | if (flacSize < 8 + typeLen) { |
| 931 | goto exit; |
| 932 | } |
| 933 | |
| 934 | memcpy(type, &flac[8], typeLen); |
| 935 | type[typeLen] = '\0'; |
| 936 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 937 | ALOGV("picType = %d, type = '%s'", picType, type); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 938 | |
| 939 | if (!strcmp(type, "-->")) { |
| 940 | // This is not inline cover art, but an external url instead. |
| 941 | goto exit; |
| 942 | } |
| 943 | |
| 944 | descLen = U32_AT(&flac[8 + typeLen]); |
| 945 | |
| 946 | if (flacSize < 32 + typeLen + descLen) { |
| 947 | goto exit; |
| 948 | } |
| 949 | |
| 950 | dataLen = U32_AT(&flac[8 + typeLen + 4 + descLen + 16]); |
| 951 | |
| 952 | if (flacSize < 32 + typeLen + descLen + dataLen) { |
| 953 | goto exit; |
| 954 | } |
| 955 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 956 | ALOGV("got image data, %d trailing bytes", |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 957 | flacSize - 32 - typeLen - descLen - dataLen); |
| 958 | |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 959 | fileMeta->setData( |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 960 | kKeyAlbumArt, 0, &flac[8 + typeLen + 4 + descLen + 20], dataLen); |
| 961 | |
Glenn Kasten | 856990b | 2011-01-13 11:17:00 -0800 | [diff] [blame] | 962 | fileMeta->setCString(kKeyAlbumArtMIME, type); |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 963 | |
| 964 | exit: |
| 965 | free(flac); |
| 966 | flac = NULL; |
| 967 | } |
| 968 | |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 969 | //////////////////////////////////////////////////////////////////////////////// |
| 970 | |
| 971 | OggExtractor::OggExtractor(const sp<DataSource> &source) |
| 972 | : mDataSource(source), |
| 973 | mInitCheck(NO_INIT), |
| 974 | mImpl(NULL) { |
| 975 | mImpl = new MyVorbisExtractor(mDataSource); |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 976 | mInitCheck = mImpl->seekToOffset(0); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 977 | |
Andreas Huber | 5a4001d | 2010-05-26 12:59:06 -0700 | [diff] [blame] | 978 | if (mInitCheck == OK) { |
| 979 | mInitCheck = mImpl->init(); |
| 980 | } |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 981 | } |
| 982 | |
| 983 | OggExtractor::~OggExtractor() { |
| 984 | delete mImpl; |
| 985 | mImpl = NULL; |
| 986 | } |
| 987 | |
| 988 | size_t OggExtractor::countTracks() { |
| 989 | return mInitCheck != OK ? 0 : 1; |
| 990 | } |
| 991 | |
| 992 | sp<MediaSource> OggExtractor::getTrack(size_t index) { |
| 993 | if (index >= 1) { |
| 994 | return NULL; |
| 995 | } |
| 996 | |
| 997 | return new OggSource(this); |
| 998 | } |
| 999 | |
| 1000 | sp<MetaData> OggExtractor::getTrackMetaData( |
| 1001 | size_t index, uint32_t flags) { |
| 1002 | if (index >= 1) { |
| 1003 | return NULL; |
| 1004 | } |
| 1005 | |
| 1006 | return mImpl->getFormat(); |
| 1007 | } |
| 1008 | |
| 1009 | sp<MetaData> OggExtractor::getMetaData() { |
Andreas Huber | 4595be9 | 2010-05-25 11:20:29 -0700 | [diff] [blame] | 1010 | return mImpl->getFileMetaData(); |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | bool SniffOgg( |
Andreas Huber | 5a1c352 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 1014 | const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| 1015 | sp<AMessage> *) { |
Andreas Huber | ee7ff20 | 2010-05-07 10:35:13 -0700 | [diff] [blame] | 1016 | char tmp[4]; |
| 1017 | if (source->readAt(0, tmp, 4) < 4 || memcmp(tmp, "OggS", 4)) { |
| 1018 | return false; |
| 1019 | } |
| 1020 | |
| 1021 | mimeType->setTo(MEDIA_MIMETYPE_CONTAINER_OGG); |
| 1022 | *confidence = 0.2f; |
| 1023 | |
| 1024 | return true; |
| 1025 | } |
| 1026 | |
| 1027 | } // namespace android |