| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "MPEG4Extractor" |
| |
| #include <ctype.h> |
| #include <inttypes.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <utils/Log.h> |
| |
| #include "include/MPEG4Extractor.h" |
| #include "include/SampleTable.h" |
| #include "include/ESDS.h" |
| |
| #include <media/stagefright/foundation/ABitReader.h> |
| #include <media/stagefright/foundation/ABuffer.h> |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <media/stagefright/foundation/AMessage.h> |
| #include <media/stagefright/foundation/AUtils.h> |
| #include <media/stagefright/MediaBuffer.h> |
| #include <media/stagefright/MediaBufferGroup.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaSource.h> |
| #include <media/stagefright/MetaData.h> |
| #include <utils/String8.h> |
| |
| #include <byteswap.h> |
| #include "include/ID3.h" |
| |
| namespace android { |
| |
| class MPEG4Source : public MediaSource { |
| public: |
| // Caller retains ownership of both "dataSource" and "sampleTable". |
| MPEG4Source(const sp<MPEG4Extractor> &owner, |
| const sp<MetaData> &format, |
| const sp<DataSource> &dataSource, |
| int32_t timeScale, |
| const sp<SampleTable> &sampleTable, |
| Vector<SidxEntry> &sidx, |
| const Trex *trex, |
| off64_t firstMoofOffset); |
| |
| virtual status_t start(MetaData *params = NULL); |
| virtual status_t stop(); |
| |
| virtual sp<MetaData> getFormat(); |
| |
| virtual status_t read(MediaBuffer **buffer, const ReadOptions *options = NULL); |
| virtual status_t fragmentedRead(MediaBuffer **buffer, const ReadOptions *options = NULL); |
| |
| protected: |
| virtual ~MPEG4Source(); |
| |
| private: |
| Mutex mLock; |
| |
| // keep the MPEG4Extractor around, since we're referencing its data |
| sp<MPEG4Extractor> mOwner; |
| sp<MetaData> mFormat; |
| sp<DataSource> mDataSource; |
| int32_t mTimescale; |
| sp<SampleTable> mSampleTable; |
| uint32_t mCurrentSampleIndex; |
| uint32_t mCurrentFragmentIndex; |
| Vector<SidxEntry> &mSegments; |
| const Trex *mTrex; |
| off64_t mFirstMoofOffset; |
| off64_t mCurrentMoofOffset; |
| off64_t mNextMoofOffset; |
| uint32_t mCurrentTime; |
| int32_t mLastParsedTrackId; |
| int32_t mTrackId; |
| |
| int32_t mCryptoMode; // passed in from extractor |
| int32_t mDefaultIVSize; // passed in from extractor |
| uint8_t mCryptoKey[16]; // passed in from extractor |
| uint32_t mCurrentAuxInfoType; |
| uint32_t mCurrentAuxInfoTypeParameter; |
| int32_t mCurrentDefaultSampleInfoSize; |
| uint32_t mCurrentSampleInfoCount; |
| uint32_t mCurrentSampleInfoAllocSize; |
| uint8_t* mCurrentSampleInfoSizes; |
| uint32_t mCurrentSampleInfoOffsetCount; |
| uint32_t mCurrentSampleInfoOffsetsAllocSize; |
| uint64_t* mCurrentSampleInfoOffsets; |
| |
| bool mIsAVC; |
| bool mIsHEVC; |
| size_t mNALLengthSize; |
| |
| bool mStarted; |
| |
| MediaBufferGroup *mGroup; |
| |
| MediaBuffer *mBuffer; |
| |
| bool mWantsNALFragments; |
| |
| uint8_t *mSrcBuffer; |
| |
| size_t parseNALSize(const uint8_t *data) const; |
| status_t parseChunk(off64_t *offset); |
| status_t parseTrackFragmentHeader(off64_t offset, off64_t size); |
| status_t parseTrackFragmentRun(off64_t offset, off64_t size); |
| status_t parseSampleAuxiliaryInformationSizes(off64_t offset, off64_t size); |
| status_t parseSampleAuxiliaryInformationOffsets(off64_t offset, off64_t size); |
| |
| struct TrackFragmentHeaderInfo { |
| enum Flags { |
| kBaseDataOffsetPresent = 0x01, |
| kSampleDescriptionIndexPresent = 0x02, |
| kDefaultSampleDurationPresent = 0x08, |
| kDefaultSampleSizePresent = 0x10, |
| kDefaultSampleFlagsPresent = 0x20, |
| kDurationIsEmpty = 0x10000, |
| }; |
| |
| uint32_t mTrackID; |
| uint32_t mFlags; |
| uint64_t mBaseDataOffset; |
| uint32_t mSampleDescriptionIndex; |
| uint32_t mDefaultSampleDuration; |
| uint32_t mDefaultSampleSize; |
| uint32_t mDefaultSampleFlags; |
| |
| uint64_t mDataOffset; |
| }; |
| TrackFragmentHeaderInfo mTrackFragmentHeaderInfo; |
| |
| struct Sample { |
| off64_t offset; |
| size_t size; |
| uint32_t duration; |
| int32_t compositionOffset; |
| uint8_t iv[16]; |
| Vector<size_t> clearsizes; |
| Vector<size_t> encryptedsizes; |
| }; |
| Vector<Sample> mCurrentSamples; |
| |
| MPEG4Source(const MPEG4Source &); |
| MPEG4Source &operator=(const MPEG4Source &); |
| }; |
| |
| // This custom data source wraps an existing one and satisfies requests |
| // falling entirely within a cached range from the cache while forwarding |
| // all remaining requests to the wrapped datasource. |
| // This is used to cache the full sampletable metadata for a single track, |
| // possibly wrapping multiple times to cover all tracks, i.e. |
| // Each MPEG4DataSource caches the sampletable metadata for a single track. |
| |
| struct MPEG4DataSource : public DataSource { |
| MPEG4DataSource(const sp<DataSource> &source); |
| |
| virtual status_t initCheck() const; |
| virtual ssize_t readAt(off64_t offset, void *data, size_t size); |
| virtual status_t getSize(off64_t *size); |
| virtual uint32_t flags(); |
| |
| status_t setCachedRange(off64_t offset, size_t size); |
| |
| protected: |
| virtual ~MPEG4DataSource(); |
| |
| private: |
| Mutex mLock; |
| |
| sp<DataSource> mSource; |
| off64_t mCachedOffset; |
| size_t mCachedSize; |
| uint8_t *mCache; |
| |
| void clearCache(); |
| |
| MPEG4DataSource(const MPEG4DataSource &); |
| MPEG4DataSource &operator=(const MPEG4DataSource &); |
| }; |
| |
| MPEG4DataSource::MPEG4DataSource(const sp<DataSource> &source) |
| : mSource(source), |
| mCachedOffset(0), |
| mCachedSize(0), |
| mCache(NULL) { |
| } |
| |
| MPEG4DataSource::~MPEG4DataSource() { |
| clearCache(); |
| } |
| |
| void MPEG4DataSource::clearCache() { |
| if (mCache) { |
| free(mCache); |
| mCache = NULL; |
| } |
| |
| mCachedOffset = 0; |
| mCachedSize = 0; |
| } |
| |
| status_t MPEG4DataSource::initCheck() const { |
| return mSource->initCheck(); |
| } |
| |
| ssize_t MPEG4DataSource::readAt(off64_t offset, void *data, size_t size) { |
| Mutex::Autolock autoLock(mLock); |
| |
| if (isInRange(mCachedOffset, mCachedSize, offset, size)) { |
| memcpy(data, &mCache[offset - mCachedOffset], size); |
| return size; |
| } |
| |
| return mSource->readAt(offset, data, size); |
| } |
| |
| status_t MPEG4DataSource::getSize(off64_t *size) { |
| return mSource->getSize(size); |
| } |
| |
| uint32_t MPEG4DataSource::flags() { |
| return mSource->flags(); |
| } |
| |
| status_t MPEG4DataSource::setCachedRange(off64_t offset, size_t size) { |
| Mutex::Autolock autoLock(mLock); |
| |
| clearCache(); |
| |
| mCache = (uint8_t *)malloc(size); |
| |
| if (mCache == NULL) { |
| return -ENOMEM; |
| } |
| |
| mCachedOffset = offset; |
| mCachedSize = size; |
| |
| ssize_t err = mSource->readAt(mCachedOffset, mCache, mCachedSize); |
| |
| if (err < (ssize_t)size) { |
| clearCache(); |
| |
| return ERROR_IO; |
| } |
| |
| return OK; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| static void hexdump(const void *_data, size_t size) { |
| const uint8_t *data = (const uint8_t *)_data; |
| size_t offset = 0; |
| while (offset < size) { |
| printf("0x%04zx ", offset); |
| |
| size_t n = size - offset; |
| if (n > 16) { |
| n = 16; |
| } |
| |
| for (size_t i = 0; i < 16; ++i) { |
| if (i == 8) { |
| printf(" "); |
| } |
| |
| if (offset + i < size) { |
| printf("%02x ", data[offset + i]); |
| } else { |
| printf(" "); |
| } |
| } |
| |
| printf(" "); |
| |
| for (size_t i = 0; i < n; ++i) { |
| if (isprint(data[offset + i])) { |
| printf("%c", data[offset + i]); |
| } else { |
| printf("."); |
| } |
| } |
| |
| printf("\n"); |
| |
| offset += 16; |
| } |
| } |
| |
| static const char *FourCC2MIME(uint32_t fourcc) { |
| switch (fourcc) { |
| case FOURCC('m', 'p', '4', 'a'): |
| return MEDIA_MIMETYPE_AUDIO_AAC; |
| |
| case FOURCC('s', 'a', 'm', 'r'): |
| return MEDIA_MIMETYPE_AUDIO_AMR_NB; |
| |
| case FOURCC('s', 'a', 'w', 'b'): |
| return MEDIA_MIMETYPE_AUDIO_AMR_WB; |
| |
| case FOURCC('m', 'p', '4', 'v'): |
| return MEDIA_MIMETYPE_VIDEO_MPEG4; |
| |
| case FOURCC('s', '2', '6', '3'): |
| case FOURCC('h', '2', '6', '3'): |
| case FOURCC('H', '2', '6', '3'): |
| return MEDIA_MIMETYPE_VIDEO_H263; |
| |
| case FOURCC('a', 'v', 'c', '1'): |
| return MEDIA_MIMETYPE_VIDEO_AVC; |
| |
| case FOURCC('h', 'v', 'c', '1'): |
| case FOURCC('h', 'e', 'v', '1'): |
| return MEDIA_MIMETYPE_VIDEO_HEVC; |
| default: |
| CHECK(!"should not be here."); |
| return NULL; |
| } |
| } |
| |
| static bool AdjustChannelsAndRate(uint32_t fourcc, uint32_t *channels, uint32_t *rate) { |
| if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, FourCC2MIME(fourcc))) { |
| // AMR NB audio is always mono, 8kHz |
| *channels = 1; |
| *rate = 8000; |
| return true; |
| } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, FourCC2MIME(fourcc))) { |
| // AMR WB audio is always mono, 16kHz |
| *channels = 1; |
| *rate = 16000; |
| return true; |
| } |
| return false; |
| } |
| |
| MPEG4Extractor::MPEG4Extractor(const sp<DataSource> &source) |
| : mMoofOffset(0), |
| mDataSource(source), |
| mInitCheck(NO_INIT), |
| mHasVideo(false), |
| mHeaderTimescale(0), |
| mFirstTrack(NULL), |
| mLastTrack(NULL), |
| mFileMetaData(new MetaData), |
| mFirstSINF(NULL), |
| mIsDrm(false) { |
| } |
| |
| MPEG4Extractor::~MPEG4Extractor() { |
| Track *track = mFirstTrack; |
| while (track) { |
| Track *next = track->next; |
| |
| delete track; |
| track = next; |
| } |
| mFirstTrack = mLastTrack = NULL; |
| |
| SINF *sinf = mFirstSINF; |
| while (sinf) { |
| SINF *next = sinf->next; |
| delete[] sinf->IPMPData; |
| delete sinf; |
| sinf = next; |
| } |
| mFirstSINF = NULL; |
| |
| for (size_t i = 0; i < mPssh.size(); i++) { |
| delete [] mPssh[i].data; |
| } |
| } |
| |
| uint32_t MPEG4Extractor::flags() const { |
| return CAN_PAUSE | |
| ((mMoofOffset == 0 || mSidxEntries.size() != 0) ? |
| (CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK) : 0); |
| } |
| |
| sp<MetaData> MPEG4Extractor::getMetaData() { |
| status_t err; |
| if ((err = readMetaData()) != OK) { |
| return new MetaData; |
| } |
| |
| return mFileMetaData; |
| } |
| |
| size_t MPEG4Extractor::countTracks() { |
| status_t err; |
| if ((err = readMetaData()) != OK) { |
| ALOGV("MPEG4Extractor::countTracks: no tracks"); |
| return 0; |
| } |
| |
| size_t n = 0; |
| Track *track = mFirstTrack; |
| while (track) { |
| ++n; |
| track = track->next; |
| } |
| |
| ALOGV("MPEG4Extractor::countTracks: %zu tracks", n); |
| return n; |
| } |
| |
| sp<MetaData> MPEG4Extractor::getTrackMetaData( |
| size_t index, uint32_t flags) { |
| status_t err; |
| if ((err = readMetaData()) != OK) { |
| return NULL; |
| } |
| |
| Track *track = mFirstTrack; |
| while (index > 0) { |
| if (track == NULL) { |
| return NULL; |
| } |
| |
| track = track->next; |
| --index; |
| } |
| |
| if (track == NULL) { |
| return NULL; |
| } |
| |
| if ((flags & kIncludeExtensiveMetaData) |
| && !track->includes_expensive_metadata) { |
| track->includes_expensive_metadata = true; |
| |
| const char *mime; |
| CHECK(track->meta->findCString(kKeyMIMEType, &mime)); |
| if (!strncasecmp("video/", mime, 6)) { |
| if (mMoofOffset > 0) { |
| int64_t duration; |
| if (track->meta->findInt64(kKeyDuration, &duration)) { |
| // nothing fancy, just pick a frame near 1/4th of the duration |
| track->meta->setInt64( |
| kKeyThumbnailTime, duration / 4); |
| } |
| } else { |
| uint32_t sampleIndex; |
| uint32_t sampleTime; |
| if (track->sampleTable->findThumbnailSample(&sampleIndex) == OK |
| && track->sampleTable->getMetaDataForSample( |
| sampleIndex, NULL /* offset */, NULL /* size */, |
| &sampleTime) == OK) { |
| track->meta->setInt64( |
| kKeyThumbnailTime, |
| ((int64_t)sampleTime * 1000000) / track->timescale); |
| } |
| } |
| } |
| } |
| |
| return track->meta; |
| } |
| |
| static void MakeFourCCString(uint32_t x, char *s) { |
| s[0] = x >> 24; |
| s[1] = (x >> 16) & 0xff; |
| s[2] = (x >> 8) & 0xff; |
| s[3] = x & 0xff; |
| s[4] = '\0'; |
| } |
| |
| status_t MPEG4Extractor::readMetaData() { |
| if (mInitCheck != NO_INIT) { |
| return mInitCheck; |
| } |
| |
| off64_t offset = 0; |
| status_t err; |
| while (true) { |
| off64_t orig_offset = offset; |
| err = parseChunk(&offset, 0); |
| |
| if (err != OK && err != UNKNOWN_ERROR) { |
| break; |
| } else if (offset <= orig_offset) { |
| // only continue parsing if the offset was advanced, |
| // otherwise we might end up in an infinite loop |
| ALOGE("did not advance: 0x%lld->0x%lld", orig_offset, offset); |
| err = ERROR_MALFORMED; |
| break; |
| } else if (err == OK) { |
| continue; |
| } |
| |
| uint32_t hdr[2]; |
| if (mDataSource->readAt(offset, hdr, 8) < 8) { |
| break; |
| } |
| uint32_t chunk_type = ntohl(hdr[1]); |
| if (chunk_type == FOURCC('m', 'o', 'o', 'f')) { |
| // store the offset of the first segment |
| mMoofOffset = offset; |
| } else if (chunk_type != FOURCC('m', 'd', 'a', 't')) { |
| // keep parsing until we get to the data |
| continue; |
| } |
| break; |
| } |
| |
| if (mInitCheck == OK) { |
| if (mHasVideo) { |
| mFileMetaData->setCString( |
| kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_MPEG4); |
| } else { |
| mFileMetaData->setCString(kKeyMIMEType, "audio/mp4"); |
| } |
| } else { |
| mInitCheck = err; |
| } |
| |
| CHECK_NE(err, (status_t)NO_INIT); |
| |
| // copy pssh data into file metadata |
| int psshsize = 0; |
| for (size_t i = 0; i < mPssh.size(); i++) { |
| psshsize += 20 + mPssh[i].datalen; |
| } |
| if (psshsize) { |
| char *buf = (char*)malloc(psshsize); |
| char *ptr = buf; |
| for (size_t i = 0; i < mPssh.size(); i++) { |
| memcpy(ptr, mPssh[i].uuid, 20); // uuid + length |
| memcpy(ptr + 20, mPssh[i].data, mPssh[i].datalen); |
| ptr += (20 + mPssh[i].datalen); |
| } |
| mFileMetaData->setData(kKeyPssh, 'pssh', buf, psshsize); |
| free(buf); |
| } |
| return mInitCheck; |
| } |
| |
| char* MPEG4Extractor::getDrmTrackInfo(size_t trackID, int *len) { |
| if (mFirstSINF == NULL) { |
| return NULL; |
| } |
| |
| SINF *sinf = mFirstSINF; |
| while (sinf && (trackID != sinf->trackID)) { |
| sinf = sinf->next; |
| } |
| |
| if (sinf == NULL) { |
| return NULL; |
| } |
| |
| *len = sinf->len; |
| return sinf->IPMPData; |
| } |
| |
| // Reads an encoded integer 7 bits at a time until it encounters the high bit clear. |
| static int32_t readSize(off64_t offset, |
| const sp<DataSource> DataSource, uint8_t *numOfBytes) { |
| uint32_t size = 0; |
| uint8_t data; |
| bool moreData = true; |
| *numOfBytes = 0; |
| |
| while (moreData) { |
| if (DataSource->readAt(offset, &data, 1) < 1) { |
| return -1; |
| } |
| offset ++; |
| moreData = (data >= 128) ? true : false; |
| size = (size << 7) | (data & 0x7f); // Take last 7 bits |
| (*numOfBytes) ++; |
| } |
| |
| return size; |
| } |
| |
| status_t MPEG4Extractor::parseDrmSINF( |
| off64_t * /* offset */, off64_t data_offset) { |
| uint8_t updateIdTag; |
| if (mDataSource->readAt(data_offset, &updateIdTag, 1) < 1) { |
| return ERROR_IO; |
| } |
| data_offset ++; |
| |
| if (0x01/*OBJECT_DESCRIPTOR_UPDATE_ID_TAG*/ != updateIdTag) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t numOfBytes; |
| int32_t size = readSize(data_offset, mDataSource, &numOfBytes); |
| if (size < 0) { |
| return ERROR_IO; |
| } |
| int32_t classSize = size; |
| data_offset += numOfBytes; |
| |
| while(size >= 11 ) { |
| uint8_t descriptorTag; |
| if (mDataSource->readAt(data_offset, &descriptorTag, 1) < 1) { |
| return ERROR_IO; |
| } |
| data_offset ++; |
| |
| if (0x11/*OBJECT_DESCRIPTOR_ID_TAG*/ != descriptorTag) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[8]; |
| //ObjectDescriptorID and ObjectDescriptor url flag |
| if (mDataSource->readAt(data_offset, buffer, 2) < 2) { |
| return ERROR_IO; |
| } |
| data_offset += 2; |
| |
| if ((buffer[1] >> 5) & 0x0001) { //url flag is set |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt(data_offset, buffer, 8) < 8) { |
| return ERROR_IO; |
| } |
| data_offset += 8; |
| |
| if ((0x0F/*ES_ID_REF_TAG*/ != buffer[1]) |
| || ( 0x0A/*IPMP_DESCRIPTOR_POINTER_ID_TAG*/ != buffer[5])) { |
| return ERROR_MALFORMED; |
| } |
| |
| SINF *sinf = new SINF; |
| sinf->trackID = U16_AT(&buffer[3]); |
| sinf->IPMPDescriptorID = buffer[7]; |
| sinf->next = mFirstSINF; |
| mFirstSINF = sinf; |
| |
| size -= (8 + 2 + 1); |
| } |
| |
| if (size != 0) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt(data_offset, &updateIdTag, 1) < 1) { |
| return ERROR_IO; |
| } |
| data_offset ++; |
| |
| if(0x05/*IPMP_DESCRIPTOR_UPDATE_ID_TAG*/ != updateIdTag) { |
| return ERROR_MALFORMED; |
| } |
| |
| size = readSize(data_offset, mDataSource, &numOfBytes); |
| if (size < 0) { |
| return ERROR_IO; |
| } |
| classSize = size; |
| data_offset += numOfBytes; |
| |
| while (size > 0) { |
| uint8_t tag; |
| int32_t dataLen; |
| if (mDataSource->readAt(data_offset, &tag, 1) < 1) { |
| return ERROR_IO; |
| } |
| data_offset ++; |
| |
| if (0x0B/*IPMP_DESCRIPTOR_ID_TAG*/ == tag) { |
| uint8_t id; |
| dataLen = readSize(data_offset, mDataSource, &numOfBytes); |
| if (dataLen < 0) { |
| return ERROR_IO; |
| } else if (dataLen < 4) { |
| return ERROR_MALFORMED; |
| } |
| data_offset += numOfBytes; |
| |
| if (mDataSource->readAt(data_offset, &id, 1) < 1) { |
| return ERROR_IO; |
| } |
| data_offset ++; |
| |
| SINF *sinf = mFirstSINF; |
| while (sinf && (sinf->IPMPDescriptorID != id)) { |
| sinf = sinf->next; |
| } |
| if (sinf == NULL) { |
| return ERROR_MALFORMED; |
| } |
| sinf->len = dataLen - 3; |
| sinf->IPMPData = new (std::nothrow) char[sinf->len]; |
| if (sinf->IPMPData == NULL) { |
| return ERROR_MALFORMED; |
| } |
| data_offset += 2; |
| |
| if (mDataSource->readAt(data_offset, sinf->IPMPData, sinf->len) < sinf->len) { |
| return ERROR_IO; |
| } |
| data_offset += sinf->len; |
| |
| size -= (dataLen + numOfBytes + 1); |
| } |
| } |
| |
| if (size != 0) { |
| return ERROR_MALFORMED; |
| } |
| |
| return UNKNOWN_ERROR; // Return a dummy error. |
| } |
| |
| struct PathAdder { |
| PathAdder(Vector<uint32_t> *path, uint32_t chunkType) |
| : mPath(path) { |
| mPath->push(chunkType); |
| } |
| |
| ~PathAdder() { |
| mPath->pop(); |
| } |
| |
| private: |
| Vector<uint32_t> *mPath; |
| |
| PathAdder(const PathAdder &); |
| PathAdder &operator=(const PathAdder &); |
| }; |
| |
| static bool underMetaDataPath(const Vector<uint32_t> &path) { |
| return path.size() >= 5 |
| && path[0] == FOURCC('m', 'o', 'o', 'v') |
| && path[1] == FOURCC('u', 'd', 't', 'a') |
| && path[2] == FOURCC('m', 'e', 't', 'a') |
| && path[3] == FOURCC('i', 'l', 's', 't'); |
| } |
| |
| // Given a time in seconds since Jan 1 1904, produce a human-readable string. |
| static void convertTimeToDate(int64_t time_1904, String8 *s) { |
| time_t time_1970 = time_1904 - (((66 * 365 + 17) * 24) * 3600); |
| |
| char tmp[32]; |
| strftime(tmp, sizeof(tmp), "%Y%m%dT%H%M%S.000Z", gmtime(&time_1970)); |
| |
| s->setTo(tmp); |
| } |
| |
| status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) { |
| ALOGV("entering parseChunk %lld/%d", *offset, depth); |
| uint32_t hdr[2]; |
| if (mDataSource->readAt(*offset, hdr, 8) < 8) { |
| return ERROR_IO; |
| } |
| uint64_t chunk_size = ntohl(hdr[0]); |
| uint32_t chunk_type = ntohl(hdr[1]); |
| off64_t data_offset = *offset + 8; |
| |
| if (chunk_size == 1) { |
| if (mDataSource->readAt(*offset + 8, &chunk_size, 8) < 8) { |
| return ERROR_IO; |
| } |
| chunk_size = ntoh64(chunk_size); |
| data_offset += 8; |
| |
| if (chunk_size < 16) { |
| // The smallest valid chunk is 16 bytes long in this case. |
| return ERROR_MALFORMED; |
| } |
| } else if (chunk_size == 0) { |
| if (depth == 0) { |
| // atom extends to end of file |
| off64_t sourceSize; |
| if (mDataSource->getSize(&sourceSize) == OK) { |
| chunk_size = (sourceSize - *offset); |
| } else { |
| // XXX could we just pick a "sufficiently large" value here? |
| ALOGE("atom size is 0, and data source has no size"); |
| return ERROR_MALFORMED; |
| } |
| } else { |
| // not allowed for non-toplevel atoms, skip it |
| *offset += 4; |
| return OK; |
| } |
| } else if (chunk_size < 8) { |
| // The smallest valid chunk is 8 bytes long. |
| ALOGE("invalid chunk size: %" PRIu64, chunk_size); |
| return ERROR_MALFORMED; |
| } |
| |
| char chunk[5]; |
| MakeFourCCString(chunk_type, chunk); |
| ALOGV("chunk: %s @ %lld, %d", chunk, *offset, depth); |
| |
| #if 0 |
| static const char kWhitespace[] = " "; |
| const char *indent = &kWhitespace[sizeof(kWhitespace) - 1 - 2 * depth]; |
| printf("%sfound chunk '%s' of size %" PRIu64 "\n", indent, chunk, chunk_size); |
| |
| char buffer[256]; |
| size_t n = chunk_size; |
| if (n > sizeof(buffer)) { |
| n = sizeof(buffer); |
| } |
| if (mDataSource->readAt(*offset, buffer, n) |
| < (ssize_t)n) { |
| return ERROR_IO; |
| } |
| |
| hexdump(buffer, n); |
| #endif |
| |
| PathAdder autoAdder(&mPath, chunk_type); |
| |
| off64_t chunk_data_size = *offset + chunk_size - data_offset; |
| |
| if (chunk_type != FOURCC('c', 'p', 'r', 't') |
| && chunk_type != FOURCC('c', 'o', 'v', 'r') |
| && mPath.size() == 5 && underMetaDataPath(mPath)) { |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset; |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| |
| return OK; |
| } |
| |
| switch(chunk_type) { |
| case FOURCC('m', 'o', 'o', 'v'): |
| case FOURCC('t', 'r', 'a', 'k'): |
| case FOURCC('m', 'd', 'i', 'a'): |
| case FOURCC('m', 'i', 'n', 'f'): |
| case FOURCC('d', 'i', 'n', 'f'): |
| case FOURCC('s', 't', 'b', 'l'): |
| case FOURCC('m', 'v', 'e', 'x'): |
| case FOURCC('m', 'o', 'o', 'f'): |
| case FOURCC('t', 'r', 'a', 'f'): |
| case FOURCC('m', 'f', 'r', 'a'): |
| case FOURCC('u', 'd', 't', 'a'): |
| case FOURCC('i', 'l', 's', 't'): |
| case FOURCC('s', 'i', 'n', 'f'): |
| case FOURCC('s', 'c', 'h', 'i'): |
| case FOURCC('e', 'd', 't', 's'): |
| { |
| if (chunk_type == FOURCC('s', 't', 'b', 'l')) { |
| ALOGV("sampleTable chunk is %" PRIu64 " bytes long.", chunk_size); |
| |
| if (mDataSource->flags() |
| & (DataSource::kWantsPrefetching |
| | DataSource::kIsCachingDataSource)) { |
| sp<MPEG4DataSource> cachedSource = |
| new MPEG4DataSource(mDataSource); |
| |
| if (cachedSource->setCachedRange(*offset, chunk_size) == OK) { |
| mDataSource = cachedSource; |
| } |
| } |
| |
| mLastTrack->sampleTable = new SampleTable(mDataSource); |
| } |
| |
| bool isTrack = false; |
| if (chunk_type == FOURCC('t', 'r', 'a', 'k')) { |
| isTrack = true; |
| |
| Track *track = new Track; |
| track->next = NULL; |
| if (mLastTrack) { |
| mLastTrack->next = track; |
| } else { |
| mFirstTrack = track; |
| } |
| mLastTrack = track; |
| |
| track->meta = new MetaData; |
| track->includes_expensive_metadata = false; |
| track->skipTrack = false; |
| track->timescale = 0; |
| track->meta->setCString(kKeyMIMEType, "application/octet-stream"); |
| } |
| |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset; |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (isTrack) { |
| if (mLastTrack->skipTrack) { |
| Track *cur = mFirstTrack; |
| |
| if (cur == mLastTrack) { |
| delete cur; |
| mFirstTrack = mLastTrack = NULL; |
| } else { |
| while (cur && cur->next != mLastTrack) { |
| cur = cur->next; |
| } |
| cur->next = NULL; |
| delete mLastTrack; |
| mLastTrack = cur; |
| } |
| |
| return OK; |
| } |
| |
| status_t err = verifyTrack(mLastTrack); |
| |
| if (err != OK) { |
| return err; |
| } |
| } else if (chunk_type == FOURCC('m', 'o', 'o', 'v')) { |
| mInitCheck = OK; |
| |
| if (!mIsDrm) { |
| return UNKNOWN_ERROR; // Return a dummy error. |
| } else { |
| return OK; |
| } |
| } |
| break; |
| } |
| |
| case FOURCC('e', 'l', 's', 't'): |
| { |
| *offset += chunk_size; |
| |
| // See 14496-12 8.6.6 |
| uint8_t version; |
| if (mDataSource->readAt(data_offset, &version, 1) < 1) { |
| return ERROR_IO; |
| } |
| |
| uint32_t entry_count; |
| if (!mDataSource->getUInt32(data_offset + 4, &entry_count)) { |
| return ERROR_IO; |
| } |
| |
| if (entry_count != 1) { |
| // we only support a single entry at the moment, for gapless playback |
| ALOGW("ignoring edit list with %d entries", entry_count); |
| } else if (mHeaderTimescale == 0) { |
| ALOGW("ignoring edit list because timescale is 0"); |
| } else { |
| off64_t entriesoffset = data_offset + 8; |
| uint64_t segment_duration; |
| int64_t media_time; |
| |
| if (version == 1) { |
| if (!mDataSource->getUInt64(entriesoffset, &segment_duration) || |
| !mDataSource->getUInt64(entriesoffset + 8, (uint64_t*)&media_time)) { |
| return ERROR_IO; |
| } |
| } else if (version == 0) { |
| uint32_t sd; |
| int32_t mt; |
| if (!mDataSource->getUInt32(entriesoffset, &sd) || |
| !mDataSource->getUInt32(entriesoffset + 4, (uint32_t*)&mt)) { |
| return ERROR_IO; |
| } |
| segment_duration = sd; |
| media_time = mt; |
| } else { |
| return ERROR_IO; |
| } |
| |
| uint64_t halfscale = mHeaderTimescale / 2; |
| segment_duration = (segment_duration * 1000000 + halfscale)/ mHeaderTimescale; |
| media_time = (media_time * 1000000 + halfscale) / mHeaderTimescale; |
| |
| int64_t duration; |
| int32_t samplerate; |
| if (mLastTrack->meta->findInt64(kKeyDuration, &duration) && |
| mLastTrack->meta->findInt32(kKeySampleRate, &samplerate)) { |
| |
| int64_t delay = (media_time * samplerate + 500000) / 1000000; |
| mLastTrack->meta->setInt32(kKeyEncoderDelay, delay); |
| |
| int64_t paddingus = duration - (segment_duration + media_time); |
| if (paddingus < 0) { |
| // track duration from media header (which is what kKeyDuration is) might |
| // be slightly shorter than the segment duration, which would make the |
| // padding negative. Clamp to zero. |
| paddingus = 0; |
| } |
| int64_t paddingsamples = (paddingus * samplerate + 500000) / 1000000; |
| mLastTrack->meta->setInt32(kKeyEncoderPadding, paddingsamples); |
| } |
| } |
| break; |
| } |
| |
| case FOURCC('f', 'r', 'm', 'a'): |
| { |
| *offset += chunk_size; |
| |
| uint32_t original_fourcc; |
| if (mDataSource->readAt(data_offset, &original_fourcc, 4) < 4) { |
| return ERROR_IO; |
| } |
| original_fourcc = ntohl(original_fourcc); |
| ALOGV("read original format: %d", original_fourcc); |
| mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(original_fourcc)); |
| uint32_t num_channels = 0; |
| uint32_t sample_rate = 0; |
| if (AdjustChannelsAndRate(original_fourcc, &num_channels, &sample_rate)) { |
| mLastTrack->meta->setInt32(kKeyChannelCount, num_channels); |
| mLastTrack->meta->setInt32(kKeySampleRate, sample_rate); |
| } |
| break; |
| } |
| |
| case FOURCC('t', 'e', 'n', 'c'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_size < 32) { |
| return ERROR_MALFORMED; |
| } |
| |
| // tenc box contains 1 byte version, 3 byte flags, 3 byte default algorithm id, one byte |
| // default IV size, 16 bytes default KeyID |
| // (ISO 23001-7) |
| char buf[4]; |
| memset(buf, 0, 4); |
| if (mDataSource->readAt(data_offset + 4, buf + 1, 3) < 3) { |
| return ERROR_IO; |
| } |
| uint32_t defaultAlgorithmId = ntohl(*((int32_t*)buf)); |
| if (defaultAlgorithmId > 1) { |
| // only 0 (clear) and 1 (AES-128) are valid |
| return ERROR_MALFORMED; |
| } |
| |
| memset(buf, 0, 4); |
| if (mDataSource->readAt(data_offset + 7, buf + 3, 1) < 1) { |
| return ERROR_IO; |
| } |
| uint32_t defaultIVSize = ntohl(*((int32_t*)buf)); |
| |
| if ((defaultAlgorithmId == 0 && defaultIVSize != 0) || |
| (defaultAlgorithmId != 0 && defaultIVSize == 0)) { |
| // only unencrypted data must have 0 IV size |
| return ERROR_MALFORMED; |
| } else if (defaultIVSize != 0 && |
| defaultIVSize != 8 && |
| defaultIVSize != 16) { |
| // only supported sizes are 0, 8 and 16 |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t defaultKeyId[16]; |
| |
| if (mDataSource->readAt(data_offset + 8, &defaultKeyId, 16) < 16) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setInt32(kKeyCryptoMode, defaultAlgorithmId); |
| mLastTrack->meta->setInt32(kKeyCryptoDefaultIVSize, defaultIVSize); |
| mLastTrack->meta->setData(kKeyCryptoKey, 'tenc', defaultKeyId, 16); |
| break; |
| } |
| |
| case FOURCC('t', 'k', 'h', 'd'): |
| { |
| *offset += chunk_size; |
| |
| status_t err; |
| if ((err = parseTrackHeader(data_offset, chunk_data_size)) != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('p', 's', 's', 'h'): |
| { |
| *offset += chunk_size; |
| |
| PsshInfo pssh; |
| |
| if (mDataSource->readAt(data_offset + 4, &pssh.uuid, 16) < 16) { |
| return ERROR_IO; |
| } |
| |
| uint32_t psshdatalen = 0; |
| if (mDataSource->readAt(data_offset + 20, &psshdatalen, 4) < 4) { |
| return ERROR_IO; |
| } |
| pssh.datalen = ntohl(psshdatalen); |
| ALOGV("pssh data size: %d", pssh.datalen); |
| if (pssh.datalen + 20 > chunk_size) { |
| // pssh data length exceeds size of containing box |
| return ERROR_MALFORMED; |
| } |
| |
| pssh.data = new (std::nothrow) uint8_t[pssh.datalen]; |
| if (pssh.data == NULL) { |
| return ERROR_MALFORMED; |
| } |
| ALOGV("allocated pssh @ %p", pssh.data); |
| ssize_t requested = (ssize_t) pssh.datalen; |
| if (mDataSource->readAt(data_offset + 24, pssh.data, requested) < requested) { |
| return ERROR_IO; |
| } |
| mPssh.push_back(pssh); |
| |
| break; |
| } |
| |
| case FOURCC('m', 'd', 'h', 'd'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t version; |
| if (mDataSource->readAt( |
| data_offset, &version, sizeof(version)) |
| < (ssize_t)sizeof(version)) { |
| return ERROR_IO; |
| } |
| |
| off64_t timescale_offset; |
| |
| if (version == 1) { |
| timescale_offset = data_offset + 4 + 16; |
| } else if (version == 0) { |
| timescale_offset = data_offset + 4 + 8; |
| } else { |
| return ERROR_IO; |
| } |
| |
| uint32_t timescale; |
| if (mDataSource->readAt( |
| timescale_offset, ×cale, sizeof(timescale)) |
| < (ssize_t)sizeof(timescale)) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->timescale = ntohl(timescale); |
| |
| // 14496-12 says all ones means indeterminate, but some files seem to use |
| // 0 instead. We treat both the same. |
| int64_t duration = 0; |
| if (version == 1) { |
| if (mDataSource->readAt( |
| timescale_offset + 4, &duration, sizeof(duration)) |
| < (ssize_t)sizeof(duration)) { |
| return ERROR_IO; |
| } |
| if (duration != -1) { |
| duration = ntoh64(duration); |
| } |
| } else { |
| uint32_t duration32; |
| if (mDataSource->readAt( |
| timescale_offset + 4, &duration32, sizeof(duration32)) |
| < (ssize_t)sizeof(duration32)) { |
| return ERROR_IO; |
| } |
| if (duration32 != 0xffffffff) { |
| duration = ntohl(duration32); |
| } |
| } |
| if (duration != 0) { |
| mLastTrack->meta->setInt64( |
| kKeyDuration, (duration * 1000000) / mLastTrack->timescale); |
| } |
| |
| uint8_t lang[2]; |
| off64_t lang_offset; |
| if (version == 1) { |
| lang_offset = timescale_offset + 4 + 8; |
| } else if (version == 0) { |
| lang_offset = timescale_offset + 4 + 4; |
| } else { |
| return ERROR_IO; |
| } |
| |
| if (mDataSource->readAt(lang_offset, &lang, sizeof(lang)) |
| < (ssize_t)sizeof(lang)) { |
| return ERROR_IO; |
| } |
| |
| // To get the ISO-639-2/T three character language code |
| // 1 bit pad followed by 3 5-bits characters. Each character |
| // is packed as the difference between its ASCII value and 0x60. |
| char lang_code[4]; |
| lang_code[0] = ((lang[0] >> 2) & 0x1f) + 0x60; |
| lang_code[1] = ((lang[0] & 0x3) << 3 | (lang[1] >> 5)) + 0x60; |
| lang_code[2] = (lang[1] & 0x1f) + 0x60; |
| lang_code[3] = '\0'; |
| |
| mLastTrack->meta->setCString( |
| kKeyMediaLanguage, lang_code); |
| |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 'd'): |
| { |
| if (chunk_data_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[8]; |
| if (chunk_data_size < (off64_t)sizeof(buffer)) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, 8) < 8) { |
| return ERROR_IO; |
| } |
| |
| if (U32_AT(buffer) != 0) { |
| // Should be version 0, flags 0. |
| return ERROR_MALFORMED; |
| } |
| |
| uint32_t entry_count = U32_AT(&buffer[4]); |
| |
| if (entry_count > 1) { |
| // For 3GPP timed text, there could be multiple tx3g boxes contain |
| // multiple text display formats. These formats will be used to |
| // display the timed text. |
| // For encrypted files, there may also be more than one entry. |
| const char *mime; |
| CHECK(mLastTrack->meta->findCString(kKeyMIMEType, &mime)); |
| if (strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP) && |
| strcasecmp(mime, "application/octet-stream")) { |
| // For now we only support a single type of media per track. |
| mLastTrack->skipTrack = true; |
| *offset += chunk_size; |
| break; |
| } |
| } |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset + 8; |
| for (uint32_t i = 0; i < entry_count; ++i) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| break; |
| } |
| |
| case FOURCC('m', 'p', '4', 'a'): |
| case FOURCC('e', 'n', 'c', 'a'): |
| case FOURCC('s', 'a', 'm', 'r'): |
| case FOURCC('s', 'a', 'w', 'b'): |
| { |
| uint8_t buffer[8 + 20]; |
| if (chunk_data_size < (ssize_t)sizeof(buffer)) { |
| // Basic AudioSampleEntry size. |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) { |
| return ERROR_IO; |
| } |
| |
| uint16_t data_ref_index = U16_AT(&buffer[6]); |
| uint32_t num_channels = U16_AT(&buffer[16]); |
| |
| uint16_t sample_size = U16_AT(&buffer[18]); |
| uint32_t sample_rate = U32_AT(&buffer[24]) >> 16; |
| |
| if (chunk_type != FOURCC('e', 'n', 'c', 'a')) { |
| // if the chunk type is enca, we'll get the type from the sinf/frma box later |
| mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type)); |
| AdjustChannelsAndRate(chunk_type, &num_channels, &sample_rate); |
| } |
| ALOGV("*** coding='%s' %d channels, size %d, rate %d\n", |
| chunk, num_channels, sample_size, sample_rate); |
| mLastTrack->meta->setInt32(kKeyChannelCount, num_channels); |
| mLastTrack->meta->setInt32(kKeySampleRate, sample_rate); |
| |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset + sizeof(buffer); |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| break; |
| } |
| |
| case FOURCC('m', 'p', '4', 'v'): |
| case FOURCC('e', 'n', 'c', 'v'): |
| case FOURCC('s', '2', '6', '3'): |
| case FOURCC('H', '2', '6', '3'): |
| case FOURCC('h', '2', '6', '3'): |
| case FOURCC('a', 'v', 'c', '1'): |
| case FOURCC('h', 'v', 'c', '1'): |
| case FOURCC('h', 'e', 'v', '1'): |
| { |
| mHasVideo = true; |
| |
| uint8_t buffer[78]; |
| if (chunk_data_size < (ssize_t)sizeof(buffer)) { |
| // Basic VideoSampleEntry size. |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) { |
| return ERROR_IO; |
| } |
| |
| uint16_t data_ref_index = U16_AT(&buffer[6]); |
| uint16_t width = U16_AT(&buffer[6 + 18]); |
| uint16_t height = U16_AT(&buffer[6 + 20]); |
| |
| // The video sample is not standard-compliant if it has invalid dimension. |
| // Use some default width and height value, and |
| // let the decoder figure out the actual width and height (and thus |
| // be prepared for INFO_FOMRAT_CHANGED event). |
| if (width == 0) width = 352; |
| if (height == 0) height = 288; |
| |
| // printf("*** coding='%s' width=%d height=%d\n", |
| // chunk, width, height); |
| |
| if (chunk_type != FOURCC('e', 'n', 'c', 'v')) { |
| // if the chunk type is encv, we'll get the type from the sinf/frma box later |
| mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type)); |
| } |
| mLastTrack->meta->setInt32(kKeyWidth, width); |
| mLastTrack->meta->setInt32(kKeyHeight, height); |
| |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset + sizeof(buffer); |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| break; |
| } |
| |
| case FOURCC('s', 't', 'c', 'o'): |
| case FOURCC('c', 'o', '6', '4'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setChunkOffsetParams( |
| chunk_type, data_offset, chunk_data_size); |
| |
| *offset += chunk_size; |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 'c'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setSampleToChunkParams( |
| data_offset, chunk_data_size); |
| |
| *offset += chunk_size; |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 'z'): |
| case FOURCC('s', 't', 'z', '2'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setSampleSizeParams( |
| chunk_type, data_offset, chunk_data_size); |
| |
| *offset += chunk_size; |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| size_t max_size; |
| err = mLastTrack->sampleTable->getMaxSampleSize(&max_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| if (max_size != 0) { |
| // Assume that a given buffer only contains at most 10 chunks, |
| // each chunk originally prefixed with a 2 byte length will |
| // have a 4 byte header (0x00 0x00 0x00 0x01) after conversion, |
| // and thus will grow by 2 bytes per chunk. |
| mLastTrack->meta->setInt32(kKeyMaxInputSize, max_size + 10 * 2); |
| } else { |
| // No size was specified. Pick a conservatively large size. |
| int32_t width, height; |
| if (!mLastTrack->meta->findInt32(kKeyWidth, &width) || |
| !mLastTrack->meta->findInt32(kKeyHeight, &height)) { |
| ALOGE("No width or height, assuming worst case 1080p"); |
| width = 1920; |
| height = 1080; |
| } |
| |
| const char *mime; |
| CHECK(mLastTrack->meta->findCString(kKeyMIMEType, &mime)); |
| if (!strcmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| // AVC requires compression ratio of at least 2, and uses |
| // macroblocks |
| max_size = ((width + 15) / 16) * ((height + 15) / 16) * 192; |
| } else { |
| // For all other formats there is no minimum compression |
| // ratio. Use compression ratio of 1. |
| max_size = width * height * 3 / 2; |
| } |
| mLastTrack->meta->setInt32(kKeyMaxInputSize, max_size); |
| } |
| |
| // NOTE: setting another piece of metadata invalidates any pointers (such as the |
| // mimetype) previously obtained, so don't cache them. |
| const char *mime; |
| CHECK(mLastTrack->meta->findCString(kKeyMIMEType, &mime)); |
| // Calculate average frame rate. |
| if (!strncasecmp("video/", mime, 6)) { |
| size_t nSamples = mLastTrack->sampleTable->countSamples(); |
| int64_t durationUs; |
| if (mLastTrack->meta->findInt64(kKeyDuration, &durationUs)) { |
| if (durationUs > 0) { |
| int32_t frameRate = (nSamples * 1000000LL + |
| (durationUs >> 1)) / durationUs; |
| mLastTrack->meta->setInt32(kKeyFrameRate, frameRate); |
| } |
| } |
| } |
| |
| break; |
| } |
| |
| case FOURCC('s', 't', 't', 's'): |
| { |
| *offset += chunk_size; |
| |
| status_t err = |
| mLastTrack->sampleTable->setTimeToSampleParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('c', 't', 't', 's'): |
| { |
| *offset += chunk_size; |
| |
| status_t err = |
| mLastTrack->sampleTable->setCompositionTimeToSampleParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 's'): |
| { |
| *offset += chunk_size; |
| |
| status_t err = |
| mLastTrack->sampleTable->setSyncSampleParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| // @xyz |
| case FOURCC('\xA9', 'x', 'y', 'z'): |
| { |
| *offset += chunk_size; |
| |
| // Best case the total data length inside "@xyz" box |
| // would be 8, for instance "@xyz" + "\x00\x04\x15\xc7" + "0+0/", |
| // where "\x00\x04" is the text string length with value = 4, |
| // "\0x15\xc7" is the language code = en, and "0+0" is a |
| // location (string) value with longitude = 0 and latitude = 0. |
| if (chunk_data_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| |
| // Worst case the location string length would be 18, |
| // for instance +90.0000-180.0000, without the trailing "/" and |
| // the string length + language code. |
| char buffer[18]; |
| |
| // Substracting 5 from the data size is because the text string length + |
| // language code takes 4 bytes, and the trailing slash "/" takes 1 byte. |
| off64_t location_length = chunk_data_size - 5; |
| if (location_length >= (off64_t) sizeof(buffer)) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset + 4, buffer, location_length) < location_length) { |
| return ERROR_IO; |
| } |
| |
| buffer[location_length] = '\0'; |
| mFileMetaData->setCString(kKeyLocation, buffer); |
| break; |
| } |
| |
| case FOURCC('e', 's', 'd', 's'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[256]; |
| if (chunk_data_size > (off64_t)sizeof(buffer)) { |
| return ERROR_BUFFER_TOO_SMALL; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, chunk_data_size) < chunk_data_size) { |
| return ERROR_IO; |
| } |
| |
| if (U32_AT(buffer) != 0) { |
| // Should be version 0, flags 0. |
| return ERROR_MALFORMED; |
| } |
| |
| mLastTrack->meta->setData( |
| kKeyESDS, kTypeESDS, &buffer[4], chunk_data_size - 4); |
| |
| if (mPath.size() >= 2 |
| && mPath[mPath.size() - 2] == FOURCC('m', 'p', '4', 'a')) { |
| // Information from the ESDS must be relied on for proper |
| // setup of sample rate and channel count for MPEG4 Audio. |
| // The generic header appears to only contain generic |
| // information... |
| |
| status_t err = updateAudioTrackInfoFromESDS_MPEG4Audio( |
| &buffer[4], chunk_data_size - 4); |
| |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| break; |
| } |
| |
| case FOURCC('a', 'v', 'c', 'C'): |
| { |
| *offset += chunk_size; |
| |
| sp<ABuffer> buffer = new ABuffer(chunk_data_size); |
| |
| if (mDataSource->readAt( |
| data_offset, buffer->data(), chunk_data_size) < chunk_data_size) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setData( |
| kKeyAVCC, kTypeAVCC, buffer->data(), chunk_data_size); |
| |
| break; |
| } |
| case FOURCC('h', 'v', 'c', 'C'): |
| { |
| sp<ABuffer> buffer = new ABuffer(chunk_data_size); |
| |
| if (mDataSource->readAt( |
| data_offset, buffer->data(), chunk_data_size) < chunk_data_size) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setData( |
| kKeyHVCC, kTypeHVCC, buffer->data(), chunk_data_size); |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('d', '2', '6', '3'): |
| { |
| *offset += chunk_size; |
| /* |
| * d263 contains a fixed 7 bytes part: |
| * vendor - 4 bytes |
| * version - 1 byte |
| * level - 1 byte |
| * profile - 1 byte |
| * optionally, "d263" box itself may contain a 16-byte |
| * bit rate box (bitr) |
| * average bit rate - 4 bytes |
| * max bit rate - 4 bytes |
| */ |
| char buffer[23]; |
| if (chunk_data_size != 7 && |
| chunk_data_size != 23) { |
| ALOGE("Incorrect D263 box size %lld", chunk_data_size); |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, chunk_data_size) < chunk_data_size) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setData(kKeyD263, kTypeD263, buffer, chunk_data_size); |
| |
| break; |
| } |
| |
| case FOURCC('m', 'e', 't', 'a'): |
| { |
| uint8_t buffer[4]; |
| if (chunk_data_size < (off64_t)sizeof(buffer)) { |
| *offset += chunk_size; |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, 4) < 4) { |
| *offset += chunk_size; |
| return ERROR_IO; |
| } |
| |
| if (U32_AT(buffer) != 0) { |
| // Should be version 0, flags 0. |
| |
| // If it's not, let's assume this is one of those |
| // apparently malformed chunks that don't have flags |
| // and completely different semantics than what's |
| // in the MPEG4 specs and skip it. |
| *offset += chunk_size; |
| return OK; |
| } |
| |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset + sizeof(buffer); |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset, depth + 1); |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| if (*offset != stop_offset) { |
| return ERROR_MALFORMED; |
| } |
| break; |
| } |
| |
| case FOURCC('m', 'e', 'a', 'n'): |
| case FOURCC('n', 'a', 'm', 'e'): |
| case FOURCC('d', 'a', 't', 'a'): |
| { |
| *offset += chunk_size; |
| |
| if (mPath.size() == 6 && underMetaDataPath(mPath)) { |
| status_t err = parseITunesMetaData(data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| break; |
| } |
| |
| case FOURCC('m', 'v', 'h', 'd'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 32) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t header[32]; |
| if (mDataSource->readAt( |
| data_offset, header, sizeof(header)) |
| < (ssize_t)sizeof(header)) { |
| return ERROR_IO; |
| } |
| |
| uint64_t creationTime; |
| uint64_t duration = 0; |
| if (header[0] == 1) { |
| creationTime = U64_AT(&header[4]); |
| mHeaderTimescale = U32_AT(&header[20]); |
| duration = U64_AT(&header[24]); |
| if (duration == 0xffffffffffffffff) { |
| duration = 0; |
| } |
| } else if (header[0] != 0) { |
| return ERROR_MALFORMED; |
| } else { |
| creationTime = U32_AT(&header[4]); |
| mHeaderTimescale = U32_AT(&header[12]); |
| uint32_t d32 = U32_AT(&header[16]); |
| if (d32 == 0xffffffff) { |
| d32 = 0; |
| } |
| duration = d32; |
| } |
| if (duration != 0) { |
| mFileMetaData->setInt64(kKeyDuration, duration * 1000000 / mHeaderTimescale); |
| } |
| |
| String8 s; |
| convertTimeToDate(creationTime, &s); |
| |
| mFileMetaData->setCString(kKeyDate, s.string()); |
| |
| break; |
| } |
| |
| case FOURCC('m', 'e', 'h', 'd'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t flags[4]; |
| if (mDataSource->readAt( |
| data_offset, flags, sizeof(flags)) |
| < (ssize_t)sizeof(flags)) { |
| return ERROR_IO; |
| } |
| |
| uint64_t duration = 0; |
| if (flags[0] == 1) { |
| // 64 bit |
| if (chunk_data_size < 12) { |
| return ERROR_MALFORMED; |
| } |
| mDataSource->getUInt64(data_offset + 4, &duration); |
| if (duration == 0xffffffffffffffff) { |
| duration = 0; |
| } |
| } else if (flags[0] == 0) { |
| // 32 bit |
| uint32_t d32; |
| mDataSource->getUInt32(data_offset + 4, &d32); |
| if (d32 == 0xffffffff) { |
| d32 = 0; |
| } |
| duration = d32; |
| } else { |
| return ERROR_MALFORMED; |
| } |
| |
| if (duration != 0) { |
| mFileMetaData->setInt64(kKeyDuration, duration * 1000000 / mHeaderTimescale); |
| } |
| |
| break; |
| } |
| |
| case FOURCC('m', 'd', 'a', 't'): |
| { |
| ALOGV("mdat chunk, drm: %d", mIsDrm); |
| if (!mIsDrm) { |
| *offset += chunk_size; |
| break; |
| } |
| |
| if (chunk_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| |
| return parseDrmSINF(offset, data_offset); |
| } |
| |
| case FOURCC('h', 'd', 'l', 'r'): |
| { |
| *offset += chunk_size; |
| |
| uint32_t buffer; |
| if (mDataSource->readAt( |
| data_offset + 8, &buffer, 4) < 4) { |
| return ERROR_IO; |
| } |
| |
| uint32_t type = ntohl(buffer); |
| // For the 3GPP file format, the handler-type within the 'hdlr' box |
| // shall be 'text'. We also want to support 'sbtl' handler type |
| // for a practical reason as various MPEG4 containers use it. |
| if (type == FOURCC('t', 'e', 'x', 't') || type == FOURCC('s', 'b', 't', 'l')) { |
| mLastTrack->meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_TEXT_3GPP); |
| } |
| |
| break; |
| } |
| |
| case FOURCC('t', 'r', 'e', 'x'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 24) { |
| return ERROR_IO; |
| } |
| uint32_t duration; |
| Trex trex; |
| if (!mDataSource->getUInt32(data_offset + 4, &trex.track_ID) || |
| !mDataSource->getUInt32(data_offset + 8, &trex.default_sample_description_index) || |
| !mDataSource->getUInt32(data_offset + 12, &trex.default_sample_duration) || |
| !mDataSource->getUInt32(data_offset + 16, &trex.default_sample_size) || |
| !mDataSource->getUInt32(data_offset + 20, &trex.default_sample_flags)) { |
| return ERROR_IO; |
| } |
| mTrex.add(trex); |
| break; |
| } |
| |
| case FOURCC('t', 'x', '3', 'g'): |
| { |
| uint32_t type; |
| const void *data; |
| size_t size = 0; |
| if (!mLastTrack->meta->findData( |
| kKeyTextFormatData, &type, &data, &size)) { |
| size = 0; |
| } |
| |
| uint8_t *buffer = new (std::nothrow) uint8_t[size + chunk_size]; |
| if (buffer == NULL) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (size > 0) { |
| memcpy(buffer, data, size); |
| } |
| |
| if ((size_t)(mDataSource->readAt(*offset, buffer + size, chunk_size)) |
| < chunk_size) { |
| delete[] buffer; |
| buffer = NULL; |
| |
| // advance read pointer so we don't end up reading this again |
| *offset += chunk_size; |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setData( |
| kKeyTextFormatData, 0, buffer, size + chunk_size); |
| |
| delete[] buffer; |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('c', 'o', 'v', 'r'): |
| { |
| *offset += chunk_size; |
| |
| if (mFileMetaData != NULL) { |
| ALOGV("chunk_data_size = %lld and data_offset = %lld", |
| chunk_data_size, data_offset); |
| sp<ABuffer> buffer = new ABuffer(chunk_data_size + 1); |
| if (mDataSource->readAt( |
| data_offset, buffer->data(), chunk_data_size) != (ssize_t)chunk_data_size) { |
| return ERROR_IO; |
| } |
| const int kSkipBytesOfDataBox = 16; |
| mFileMetaData->setData( |
| kKeyAlbumArt, MetaData::TYPE_NONE, |
| buffer->data() + kSkipBytesOfDataBox, chunk_data_size - kSkipBytesOfDataBox); |
| } |
| |
| break; |
| } |
| |
| case FOURCC('t', 'i', 't', 'l'): |
| case FOURCC('p', 'e', 'r', 'f'): |
| case FOURCC('a', 'u', 't', 'h'): |
| case FOURCC('g', 'n', 'r', 'e'): |
| case FOURCC('a', 'l', 'b', 'm'): |
| case FOURCC('y', 'r', 'r', 'c'): |
| { |
| *offset += chunk_size; |
| |
| status_t err = parse3GPPMetaData(data_offset, chunk_data_size, depth); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('I', 'D', '3', '2'): |
| { |
| *offset += chunk_size; |
| |
| if (chunk_data_size < 6) { |
| return ERROR_MALFORMED; |
| } |
| |
| parseID3v2MetaData(data_offset + 6); |
| |
| break; |
| } |
| |
| case FOURCC('-', '-', '-', '-'): |
| { |
| mLastCommentMean.clear(); |
| mLastCommentName.clear(); |
| mLastCommentData.clear(); |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 'i', 'd', 'x'): |
| { |
| parseSegmentIndex(data_offset, chunk_data_size); |
| *offset += chunk_size; |
| return UNKNOWN_ERROR; // stop parsing after sidx |
| } |
| |
| default: |
| { |
| *offset += chunk_size; |
| break; |
| } |
| } |
| |
| return OK; |
| } |
| |
| status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) { |
| ALOGV("MPEG4Extractor::parseSegmentIndex"); |
| |
| if (size < 12) { |
| return -EINVAL; |
| } |
| |
| uint32_t flags; |
| if (!mDataSource->getUInt32(offset, &flags)) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint32_t version = flags >> 24; |
| flags &= 0xffffff; |
| |
| ALOGV("sidx version %d", version); |
| |
| uint32_t referenceId; |
| if (!mDataSource->getUInt32(offset + 4, &referenceId)) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint32_t timeScale; |
| if (!mDataSource->getUInt32(offset + 8, &timeScale)) { |
| return ERROR_MALFORMED; |
| } |
| ALOGV("sidx refid/timescale: %d/%d", referenceId, timeScale); |
| |
| uint64_t earliestPresentationTime; |
| uint64_t firstOffset; |
| |
| offset += 12; |
| size -= 12; |
| |
| if (version == 0) { |
| if (size < 8) { |
| return -EINVAL; |
| } |
| uint32_t tmp; |
| if (!mDataSource->getUInt32(offset, &tmp)) { |
| return ERROR_MALFORMED; |
| } |
| earliestPresentationTime = tmp; |
| if (!mDataSource->getUInt32(offset + 4, &tmp)) { |
| return ERROR_MALFORMED; |
| } |
| firstOffset = tmp; |
| offset += 8; |
| size -= 8; |
| } else { |
| if (size < 16) { |
| return -EINVAL; |
| } |
| if (!mDataSource->getUInt64(offset, &earliestPresentationTime)) { |
| return ERROR_MALFORMED; |
| } |
| if (!mDataSource->getUInt64(offset + 8, &firstOffset)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 16; |
| size -= 16; |
| } |
| ALOGV("sidx pres/off: %" PRIu64 "/%" PRIu64, earliestPresentationTime, firstOffset); |
| |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| uint16_t referenceCount; |
| if (!mDataSource->getUInt16(offset + 2, &referenceCount)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| ALOGV("refcount: %d", referenceCount); |
| |
| if (size < referenceCount * 12) { |
| return -EINVAL; |
| } |
| |
| uint64_t total_duration = 0; |
| for (unsigned int i = 0; i < referenceCount; i++) { |
| uint32_t d1, d2, d3; |
| |
| if (!mDataSource->getUInt32(offset, &d1) || // size |
| !mDataSource->getUInt32(offset + 4, &d2) || // duration |
| !mDataSource->getUInt32(offset + 8, &d3)) { // flags |
| return ERROR_MALFORMED; |
| } |
| |
| if (d1 & 0x80000000) { |
| ALOGW("sub-sidx boxes not supported yet"); |
| } |
| bool sap = d3 & 0x80000000; |
| uint32_t saptype = (d3 >> 28) & 7; |
| if (!sap || (saptype != 1 && saptype != 2)) { |
| // type 1 and 2 are sync samples |
| ALOGW("not a stream access point, or unsupported type: %08x", d3); |
| } |
| total_duration += d2; |
| offset += 12; |
| ALOGV(" item %d, %08x %08x %08x", i, d1, d2, d3); |
| SidxEntry se; |
| se.mSize = d1 & 0x7fffffff; |
| se.mDurationUs = 1000000LL * d2 / timeScale; |
| mSidxEntries.add(se); |
| } |
| |
| uint64_t sidxDuration = total_duration * 1000000 / timeScale; |
| |
| int64_t metaDuration; |
| if (!mLastTrack->meta->findInt64(kKeyDuration, &metaDuration) || metaDuration == 0) { |
| mLastTrack->meta->setInt64(kKeyDuration, sidxDuration); |
| } |
| return OK; |
| } |
| |
| |
| |
| status_t MPEG4Extractor::parseTrackHeader( |
| off64_t data_offset, off64_t data_size) { |
| if (data_size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t version; |
| if (mDataSource->readAt(data_offset, &version, 1) < 1) { |
| return ERROR_IO; |
| } |
| |
| size_t dynSize = (version == 1) ? 36 : 24; |
| |
| uint8_t buffer[36 + 60]; |
| |
| if (data_size != (off64_t)dynSize + 60) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, data_size) < (ssize_t)data_size) { |
| return ERROR_IO; |
| } |
| |
| uint64_t ctime, mtime, duration; |
| int32_t id; |
| |
| if (version == 1) { |
| ctime = U64_AT(&buffer[4]); |
| mtime = U64_AT(&buffer[12]); |
| id = U32_AT(&buffer[20]); |
| duration = U64_AT(&buffer[28]); |
| } else if (version == 0) { |
| ctime = U32_AT(&buffer[4]); |
| mtime = U32_AT(&buffer[8]); |
| id = U32_AT(&buffer[12]); |
| duration = U32_AT(&buffer[20]); |
| } else { |
| return ERROR_UNSUPPORTED; |
| } |
| |
| mLastTrack->meta->setInt32(kKeyTrackID, id); |
| |
| size_t matrixOffset = dynSize + 16; |
| int32_t a00 = U32_AT(&buffer[matrixOffset]); |
| int32_t a01 = U32_AT(&buffer[matrixOffset + 4]); |
| int32_t dx = U32_AT(&buffer[matrixOffset + 8]); |
| int32_t a10 = U32_AT(&buffer[matrixOffset + 12]); |
| int32_t a11 = U32_AT(&buffer[matrixOffset + 16]); |
| int32_t dy = U32_AT(&buffer[matrixOffset + 20]); |
| |
| #if 0 |
| ALOGI("x' = %.2f * x + %.2f * y + %.2f", |
| a00 / 65536.0f, a01 / 65536.0f, dx / 65536.0f); |
| ALOGI("y' = %.2f * x + %.2f * y + %.2f", |
| a10 / 65536.0f, a11 / 65536.0f, dy / 65536.0f); |
| #endif |
| |
| uint32_t rotationDegrees; |
| |
| static const int32_t kFixedOne = 0x10000; |
| if (a00 == kFixedOne && a01 == 0 && a10 == 0 && a11 == kFixedOne) { |
| // Identity, no rotation |
| rotationDegrees = 0; |
| } else if (a00 == 0 && a01 == kFixedOne && a10 == -kFixedOne && a11 == 0) { |
| rotationDegrees = 90; |
| } else if (a00 == 0 && a01 == -kFixedOne && a10 == kFixedOne && a11 == 0) { |
| rotationDegrees = 270; |
| } else if (a00 == -kFixedOne && a01 == 0 && a10 == 0 && a11 == -kFixedOne) { |
| rotationDegrees = 180; |
| } else { |
| ALOGW("We only support 0,90,180,270 degree rotation matrices"); |
| rotationDegrees = 0; |
| } |
| |
| if (rotationDegrees != 0) { |
| mLastTrack->meta->setInt32(kKeyRotation, rotationDegrees); |
| } |
| |
| // Handle presentation display size, which could be different |
| // from the image size indicated by kKeyWidth and kKeyHeight. |
| uint32_t width = U32_AT(&buffer[dynSize + 52]); |
| uint32_t height = U32_AT(&buffer[dynSize + 56]); |
| mLastTrack->meta->setInt32(kKeyDisplayWidth, width >> 16); |
| mLastTrack->meta->setInt32(kKeyDisplayHeight, height >> 16); |
| |
| return OK; |
| } |
| |
| status_t MPEG4Extractor::parseITunesMetaData(off64_t offset, size_t size) { |
| if (size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t *buffer = new (std::nothrow) uint8_t[size + 1]; |
| if (buffer == NULL) { |
| return ERROR_MALFORMED; |
| } |
| if (mDataSource->readAt( |
| offset, buffer, size) != (ssize_t)size) { |
| delete[] buffer; |
| buffer = NULL; |
| |
| return ERROR_IO; |
| } |
| |
| uint32_t flags = U32_AT(buffer); |
| |
| uint32_t metadataKey = 0; |
| char chunk[5]; |
| MakeFourCCString(mPath[4], chunk); |
| ALOGV("meta: %s @ %lld", chunk, offset); |
| switch (mPath[4]) { |
| case FOURCC(0xa9, 'a', 'l', 'b'): |
| { |
| metadataKey = kKeyAlbum; |
| break; |
| } |
| case FOURCC(0xa9, 'A', 'R', 'T'): |
| { |
| metadataKey = kKeyArtist; |
| break; |
| } |
| case FOURCC('a', 'A', 'R', 'T'): |
| { |
| metadataKey = kKeyAlbumArtist; |
| break; |
| } |
| case FOURCC(0xa9, 'd', 'a', 'y'): |
| { |
| metadataKey = kKeyYear; |
| break; |
| } |
| case FOURCC(0xa9, 'n', 'a', 'm'): |
| { |
| metadataKey = kKeyTitle; |
| break; |
| } |
| case FOURCC(0xa9, 'w', 'r', 't'): |
| { |
| metadataKey = kKeyWriter; |
| break; |
| } |
| case FOURCC('c', 'o', 'v', 'r'): |
| { |
| metadataKey = kKeyAlbumArt; |
| break; |
| } |
| case FOURCC('g', 'n', 'r', 'e'): |
| { |
| metadataKey = kKeyGenre; |
| break; |
| } |
| case FOURCC(0xa9, 'g', 'e', 'n'): |
| { |
| metadataKey = kKeyGenre; |
| break; |
| } |
| case FOURCC('c', 'p', 'i', 'l'): |
| { |
| if (size == 9 && flags == 21) { |
| char tmp[16]; |
| sprintf(tmp, "%d", |
| (int)buffer[size - 1]); |
| |
| mFileMetaData->setCString(kKeyCompilation, tmp); |
| } |
| break; |
| } |
| case FOURCC('t', 'r', 'k', 'n'): |
| { |
| if (size == 16 && flags == 0) { |
| char tmp[16]; |
| uint16_t* pTrack = (uint16_t*)&buffer[10]; |
| uint16_t* pTotalTracks = (uint16_t*)&buffer[12]; |
| sprintf(tmp, "%d/%d", ntohs(*pTrack), ntohs(*pTotalTracks)); |
| |
| mFileMetaData->setCString(kKeyCDTrackNumber, tmp); |
| } |
| break; |
| } |
| case FOURCC('d', 'i', 's', 'k'): |
| { |
| if ((size == 14 || size == 16) && flags == 0) { |
| char tmp[16]; |
| uint16_t* pDisc = (uint16_t*)&buffer[10]; |
| uint16_t* pTotalDiscs = (uint16_t*)&buffer[12]; |
| sprintf(tmp, "%d/%d", ntohs(*pDisc), ntohs(*pTotalDiscs)); |
| |
| mFileMetaData->setCString(kKeyDiscNumber, tmp); |
| } |
| break; |
| } |
| case FOURCC('-', '-', '-', '-'): |
| { |
| buffer[size] = '\0'; |
| switch (mPath[5]) { |
| case FOURCC('m', 'e', 'a', 'n'): |
| mLastCommentMean.setTo((const char *)buffer + 4); |
| break; |
| case FOURCC('n', 'a', 'm', 'e'): |
| mLastCommentName.setTo((const char *)buffer + 4); |
| break; |
| case FOURCC('d', 'a', 't', 'a'): |
| mLastCommentData.setTo((const char *)buffer + 8); |
| break; |
| } |
| |
| // Once we have a set of mean/name/data info, go ahead and process |
| // it to see if its something we are interested in. Whether or not |
| // were are interested in the specific tag, make sure to clear out |
| // the set so we can be ready to process another tuple should one |
| // show up later in the file. |
| if ((mLastCommentMean.length() != 0) && |
| (mLastCommentName.length() != 0) && |
| (mLastCommentData.length() != 0)) { |
| |
| if (mLastCommentMean == "com.apple.iTunes" |
| && mLastCommentName == "iTunSMPB") { |
| int32_t delay, padding; |
| if (sscanf(mLastCommentData, |
| " %*x %x %x %*x", &delay, &padding) == 2) { |
| mLastTrack->meta->setInt32(kKeyEncoderDelay, delay); |
| mLastTrack->meta->setInt32(kKeyEncoderPadding, padding); |
| } |
| } |
| |
| mLastCommentMean.clear(); |
| mLastCommentName.clear(); |
| mLastCommentData.clear(); |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| if (size >= 8 && metadataKey && !mFileMetaData->hasData(metadataKey)) { |
| if (metadataKey == kKeyAlbumArt) { |
| mFileMetaData->setData( |
| kKeyAlbumArt, MetaData::TYPE_NONE, |
| buffer + 8, size - 8); |
| } else if (metadataKey == kKeyGenre) { |
| if (flags == 0) { |
| // uint8_t genre code, iTunes genre codes are |
| // the standard id3 codes, except they start |
| // at 1 instead of 0 (e.g. Pop is 14, not 13) |
| // We use standard id3 numbering, so subtract 1. |
| int genrecode = (int)buffer[size - 1]; |
| genrecode--; |
| if (genrecode < 0) { |
| genrecode = 255; // reserved for 'unknown genre' |
| } |
| char genre[10]; |
| sprintf(genre, "%d", genrecode); |
| |
| mFileMetaData->setCString(metadataKey, genre); |
| } else if (flags == 1) { |
| // custom genre string |
| buffer[size] = '\0'; |
| |
| mFileMetaData->setCString( |
| metadataKey, (const char *)buffer + 8); |
| } |
| } else { |
| buffer[size] = '\0'; |
| |
| mFileMetaData->setCString( |
| metadataKey, (const char *)buffer + 8); |
| } |
| } |
| |
| delete[] buffer; |
| buffer = NULL; |
| |
| return OK; |
| } |
| |
| status_t MPEG4Extractor::parse3GPPMetaData(off64_t offset, size_t size, int depth) { |
| if (size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t *buffer = new (std::nothrow) uint8_t[size]; |
| if (buffer == NULL) { |
| return ERROR_MALFORMED; |
| } |
| if (mDataSource->readAt( |
| offset, buffer, size) != (ssize_t)size) { |
| delete[] buffer; |
| buffer = NULL; |
| |
| return ERROR_IO; |
| } |
| |
| uint32_t metadataKey = 0; |
| switch (mPath[depth]) { |
| case FOURCC('t', 'i', 't', 'l'): |
| { |
| metadataKey = kKeyTitle; |
| break; |
| } |
| case FOURCC('p', 'e', 'r', 'f'): |
| { |
| metadataKey = kKeyArtist; |
| break; |
| } |
| case FOURCC('a', 'u', 't', 'h'): |
| { |
| metadataKey = kKeyWriter; |
| break; |
| } |
| case FOURCC('g', 'n', 'r', 'e'): |
| { |
| metadataKey = kKeyGenre; |
| break; |
| } |
| case FOURCC('a', 'l', 'b', 'm'): |
| { |
| if (buffer[size - 1] != '\0') { |
| char tmp[4]; |
| sprintf(tmp, "%u", buffer[size - 1]); |
| |
| mFileMetaData->setCString(kKeyCDTrackNumber, tmp); |
| } |
| |
| metadataKey = kKeyAlbum; |
| break; |
| } |
| case FOURCC('y', 'r', 'r', 'c'): |
| { |
| char tmp[5]; |
| uint16_t year = U16_AT(&buffer[4]); |
| |
| if (year < 10000) { |
| sprintf(tmp, "%u", year); |
| |
| mFileMetaData->setCString(kKeyYear, tmp); |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| if (metadataKey > 0) { |
| bool isUTF8 = true; // Common case |
| char16_t *framedata = NULL; |
| int len16 = 0; // Number of UTF-16 characters |
| |
| // smallest possible valid UTF-16 string w BOM: 0xfe 0xff 0x00 0x00 |
| if (size - 6 >= 4) { |
| len16 = ((size - 6) / 2) - 1; // don't include 0x0000 terminator |
| framedata = (char16_t *)(buffer + 6); |
| if (0xfffe == *framedata) { |
| // endianness marker (BOM) doesn't match host endianness |
| for (int i = 0; i < len16; i++) { |
| framedata[i] = bswap_16(framedata[i]); |
| } |
| // BOM is now swapped to 0xfeff, we will execute next block too |
| } |
| |
| if (0xfeff == *framedata) { |
| // Remove the BOM |
| framedata++; |
| len16--; |
| isUTF8 = false; |
| } |
| // else normal non-zero-length UTF-8 string |
| // we can't handle UTF-16 without BOM as there is no other |
| // indication of encoding. |
| } |
| |
| if (isUTF8) { |
| mFileMetaData->setCString(metadataKey, (const char *)buffer + 6); |
| } else { |
| // Convert from UTF-16 string to UTF-8 string. |
| String8 tmpUTF8str(framedata, len16); |
| mFileMetaData->setCString(metadataKey, tmpUTF8str.string()); |
| } |
| } |
| |
| delete[] buffer; |
| buffer = NULL; |
| |
| return OK; |
| } |
| |
| void MPEG4Extractor::parseID3v2MetaData(off64_t offset) { |
| ID3 id3(mDataSource, true /* ignorev1 */, offset); |
| |
| if (id3.isValid()) { |
| struct Map { |
| int key; |
| const char *tag1; |
| const char *tag2; |
| }; |
| static const Map kMap[] = { |
| { kKeyAlbum, "TALB", "TAL" }, |
| { kKeyArtist, "TPE1", "TP1" }, |
| { kKeyAlbumArtist, "TPE2", "TP2" }, |
| { kKeyComposer, "TCOM", "TCM" }, |
| { kKeyGenre, "TCON", "TCO" }, |
| { kKeyTitle, "TIT2", "TT2" }, |
| { kKeyYear, "TYE", "TYER" }, |
| { kKeyAuthor, "TXT", "TEXT" }, |
| { kKeyCDTrackNumber, "TRK", "TRCK" }, |
| { kKeyDiscNumber, "TPA", "TPOS" }, |
| { kKeyCompilation, "TCP", "TCMP" }, |
| }; |
| static const size_t kNumMapEntries = sizeof(kMap) / sizeof(kMap[0]); |
| |
| for (size_t i = 0; i < kNumMapEntries; ++i) { |
| if (!mFileMetaData->hasData(kMap[i].key)) { |
| ID3::Iterator *it = new ID3::Iterator(id3, kMap[i].tag1); |
| if (it->done()) { |
| delete it; |
| it = new ID3::Iterator(id3, kMap[i].tag2); |
| } |
| |
| if (it->done()) { |
| delete it; |
| continue; |
| } |
| |
| String8 s; |
| it->getString(&s); |
| delete it; |
| |
| mFileMetaData->setCString(kMap[i].key, s); |
| } |
| } |
| |
| size_t dataSize; |
| String8 mime; |
| const void *data = id3.getAlbumArt(&dataSize, &mime); |
| |
| if (data) { |
| mFileMetaData->setData(kKeyAlbumArt, MetaData::TYPE_NONE, data, dataSize); |
| mFileMetaData->setCString(kKeyAlbumArtMIME, mime.string()); |
| } |
| } |
| } |
| |
| sp<MediaSource> MPEG4Extractor::getTrack(size_t index) { |
| status_t err; |
| if ((err = readMetaData()) != OK) { |
| return NULL; |
| } |
| |
| Track *track = mFirstTrack; |
| while (index > 0) { |
| if (track == NULL) { |
| return NULL; |
| } |
| |
| track = track->next; |
| --index; |
| } |
| |
| if (track == NULL) { |
| return NULL; |
| } |
| |
| |
| Trex *trex = NULL; |
| int32_t trackId; |
| if (track->meta->findInt32(kKeyTrackID, &trackId)) { |
| for (size_t i = 0; i < mTrex.size(); i++) { |
| Trex *t = &mTrex.editItemAt(index); |
| if (t->track_ID == (uint32_t) trackId) { |
| trex = t; |
| break; |
| } |
| } |
| } |
| |
| ALOGV("getTrack called, pssh: %zu", mPssh.size()); |
| |
| return new MPEG4Source(this, |
| track->meta, mDataSource, track->timescale, track->sampleTable, |
| mSidxEntries, trex, mMoofOffset); |
| } |
| |
| // static |
| status_t MPEG4Extractor::verifyTrack(Track *track) { |
| const char *mime; |
| CHECK(track->meta->findCString(kKeyMIMEType, &mime)); |
| |
| uint32_t type; |
| const void *data; |
| size_t size; |
| if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| if (!track->meta->findData(kKeyAVCC, &type, &data, &size) |
| || type != kTypeAVCC) { |
| return ERROR_MALFORMED; |
| } |
| } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC)) { |
| if (!track->meta->findData(kKeyHVCC, &type, &data, &size) |
| || type != kTypeHVCC) { |
| return ERROR_MALFORMED; |
| } |
| } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) |
| || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| if (!track->meta->findData(kKeyESDS, &type, &data, &size) |
| || type != kTypeESDS) { |
| return ERROR_MALFORMED; |
| } |
| } |
| |
| if (track->sampleTable == NULL || !track->sampleTable->isValid()) { |
| // Make sure we have all the metadata we need. |
| ALOGE("stbl atom missing/invalid."); |
| return ERROR_MALFORMED; |
| } |
| |
| return OK; |
| } |
| |
| typedef enum { |
| //AOT_NONE = -1, |
| //AOT_NULL_OBJECT = 0, |
| //AOT_AAC_MAIN = 1, /**< Main profile */ |
| AOT_AAC_LC = 2, /**< Low Complexity object */ |
| //AOT_AAC_SSR = 3, |
| //AOT_AAC_LTP = 4, |
| AOT_SBR = 5, |
| //AOT_AAC_SCAL = 6, |
| //AOT_TWIN_VQ = 7, |
| //AOT_CELP = 8, |
| //AOT_HVXC = 9, |
| //AOT_RSVD_10 = 10, /**< (reserved) */ |
| //AOT_RSVD_11 = 11, /**< (reserved) */ |
| //AOT_TTSI = 12, /**< TTSI Object */ |
| //AOT_MAIN_SYNTH = 13, /**< Main Synthetic object */ |
| //AOT_WAV_TAB_SYNTH = 14, /**< Wavetable Synthesis object */ |
| //AOT_GEN_MIDI = 15, /**< General MIDI object */ |
| //AOT_ALG_SYNTH_AUD_FX = 16, /**< Algorithmic Synthesis and Audio FX object */ |
| AOT_ER_AAC_LC = 17, /**< Error Resilient(ER) AAC Low Complexity */ |
| //AOT_RSVD_18 = 18, /**< (reserved) */ |
| //AOT_ER_AAC_LTP = 19, /**< Error Resilient(ER) AAC LTP object */ |
| AOT_ER_AAC_SCAL = 20, /**< Error Resilient(ER) AAC Scalable object */ |
| //AOT_ER_TWIN_VQ = 21, /**< Error Resilient(ER) TwinVQ object */ |
| AOT_ER_BSAC = 22, /**< Error Resilient(ER) BSAC object */ |
| AOT_ER_AAC_LD = 23, /**< Error Resilient(ER) AAC LowDelay object */ |
| //AOT_ER_CELP = 24, /**< Error Resilient(ER) CELP object */ |
| //AOT_ER_HVXC = 25, /**< Error Resilient(ER) HVXC object */ |
| //AOT_ER_HILN = 26, /**< Error Resilient(ER) HILN object */ |
| //AOT_ER_PARA = 27, /**< Error Resilient(ER) Parametric object */ |
| //AOT_RSVD_28 = 28, /**< might become SSC */ |
| AOT_PS = 29, /**< PS, Parametric Stereo (includes SBR) */ |
| //AOT_MPEGS = 30, /**< MPEG Surround */ |
| |
| AOT_ESCAPE = 31, /**< Signal AOT uses more than 5 bits */ |
| |
| //AOT_MP3ONMP4_L1 = 32, /**< MPEG-Layer1 in mp4 */ |
| //AOT_MP3ONMP4_L2 = 33, /**< MPEG-Layer2 in mp4 */ |
| //AOT_MP3ONMP4_L3 = 34, /**< MPEG-Layer3 in mp4 */ |
| //AOT_RSVD_35 = 35, /**< might become DST */ |
| //AOT_RSVD_36 = 36, /**< might become ALS */ |
| //AOT_AAC_SLS = 37, /**< AAC + SLS */ |
| //AOT_SLS = 38, /**< SLS */ |
| //AOT_ER_AAC_ELD = 39, /**< AAC Enhanced Low Delay */ |
| |
| //AOT_USAC = 42, /**< USAC */ |
| //AOT_SAOC = 43, /**< SAOC */ |
| //AOT_LD_MPEGS = 44, /**< Low Delay MPEG Surround */ |
| |
| //AOT_RSVD50 = 50, /**< Interim AOT for Rsvd50 */ |
| } AUDIO_OBJECT_TYPE; |
| |
| status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio( |
| const void *esds_data, size_t esds_size) { |
| ESDS esds(esds_data, esds_size); |
| |
| uint8_t objectTypeIndication; |
| if (esds.getObjectTypeIndication(&objectTypeIndication) != OK) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (objectTypeIndication == 0xe1) { |
| // This isn't MPEG4 audio at all, it's QCELP 14k... |
| mLastTrack->meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_QCELP); |
| return OK; |
| } |
| |
| if (objectTypeIndication == 0x6b) { |
| // The media subtype is MP3 audio |
| // Our software MP3 audio decoder may not be able to handle |
| // packetized MP3 audio; for now, lets just return ERROR_UNSUPPORTED |
| ALOGE("MP3 track in MP4/3GPP file is not supported"); |
| return ERROR_UNSUPPORTED; |
| } |
| |
| const uint8_t *csd; |
| size_t csd_size; |
| if (esds.getCodecSpecificInfo( |
| (const void **)&csd, &csd_size) != OK) { |
| return ERROR_MALFORMED; |
| } |
| |
| #if 0 |
| printf("ESD of size %d\n", csd_size); |
| hexdump(csd, csd_size); |
| #endif |
| |
| if (csd_size == 0) { |
| // There's no further information, i.e. no codec specific data |
| // Let's assume that the information provided in the mpeg4 headers |
| // is accurate and hope for the best. |
| |
| return OK; |
| } |
| |
| if (csd_size < 2) { |
| return ERROR_MALFORMED; |
| } |
| |
| static uint32_t kSamplingRate[] = { |
| 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, |
| 16000, 12000, 11025, 8000, 7350 |
| }; |
| |
| ABitReader br(csd, csd_size); |
| uint32_t objectType = br.getBits(5); |
| |
| if (objectType == 31) { // AAC-ELD => additional 6 bits |
| objectType = 32 + br.getBits(6); |
| } |
| |
| //keep AOT type |
| mLastTrack->meta->setInt32(kKeyAACAOT, objectType); |
| |
| uint32_t freqIndex = br.getBits(4); |
| |
| int32_t sampleRate = 0; |
| int32_t numChannels = 0; |
| if (freqIndex == 15) { |
| if (csd_size < 5) { |
| return ERROR_MALFORMED; |
| } |
| sampleRate = br.getBits(24); |
| numChannels = br.getBits(4); |
| } else { |
| numChannels = br.getBits(4); |
| |
| if (freqIndex == 13 || freqIndex == 14) { |
| return ERROR_MALFORMED; |
| } |
| |
| sampleRate = kSamplingRate[freqIndex]; |
| } |
| |
| if (objectType == AOT_SBR || objectType == AOT_PS) {//SBR specific config per 14496-3 table 1.13 |
| uint32_t extFreqIndex = br.getBits(4); |
| int32_t extSampleRate; |
| if (extFreqIndex == 15) { |
| if (csd_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| extSampleRate = br.getBits(24); |
| } else { |
| if (extFreqIndex == 13 || extFreqIndex == 14) { |
| return ERROR_MALFORMED; |
| } |
| extSampleRate = kSamplingRate[extFreqIndex]; |
| } |
| //TODO: save the extension sampling rate value in meta data => |
| // mLastTrack->meta->setInt32(kKeyExtSampleRate, extSampleRate); |
| } |
| |
| switch (numChannels) { |
| // values defined in 14496-3_2009 amendment-4 Table 1.19 - Channel Configuration |
| case 0: |
| case 1:// FC |
| case 2:// FL FR |
| case 3:// FC, FL FR |
| case 4:// FC, FL FR, RC |
| case 5:// FC, FL FR, SL SR |
| case 6:// FC, FL FR, SL SR, LFE |
| //numChannels already contains the right value |
| break; |
| case 11:// FC, FL FR, SL SR, RC, LFE |
| numChannels = 7; |
| break; |
| case 7: // FC, FCL FCR, FL FR, SL SR, LFE |
| case 12:// FC, FL FR, SL SR, RL RR, LFE |
| case 14:// FC, FL FR, SL SR, LFE, FHL FHR |
| numChannels = 8; |
| break; |
| default: |
| return ERROR_UNSUPPORTED; |
| } |
| |
| { |
| if (objectType == AOT_SBR || objectType == AOT_PS) { |
| objectType = br.getBits(5); |
| |
| if (objectType == AOT_ESCAPE) { |
| objectType = 32 + br.getBits(6); |
| } |
| } |
| if (objectType == AOT_AAC_LC || objectType == AOT_ER_AAC_LC || |
| objectType == AOT_ER_AAC_LD || objectType == AOT_ER_AAC_SCAL || |
| objectType == AOT_ER_BSAC) { |
| const int32_t frameLengthFlag = br.getBits(1); |
| |
| const int32_t dependsOnCoreCoder = br.getBits(1); |
| |
| if (dependsOnCoreCoder ) { |
| const int32_t coreCoderDelay = br.getBits(14); |
| } |
| |
| int32_t extensionFlag = -1; |
| if (br.numBitsLeft() > 0) { |
| extensionFlag = br.getBits(1); |
| } else { |
| switch (objectType) { |
| // 14496-3 4.5.1.1 extensionFlag |
| case AOT_AAC_LC: |
| extensionFlag = 0; |
| break; |
| case AOT_ER_AAC_LC: |
| case AOT_ER_AAC_SCAL: |
| case AOT_ER_BSAC: |
| case AOT_ER_AAC_LD: |
| extensionFlag = 1; |
| break; |
| default: |
| TRESPASS(); |
| break; |
| } |
| ALOGW("csd missing extension flag; assuming %d for object type %u.", |
| extensionFlag, objectType); |
| } |
| |
| if (numChannels == 0) { |
| int32_t channelsEffectiveNum = 0; |
| int32_t channelsNum = 0; |
| const int32_t ElementInstanceTag = br.getBits(4); |
| const int32_t Profile = br.getBits(2); |
| const int32_t SamplingFrequencyIndex = br.getBits(4); |
| const int32_t NumFrontChannelElements = br.getBits(4); |
| const int32_t NumSideChannelElements = br.getBits(4); |
| const int32_t NumBackChannelElements = br.getBits(4); |
| const int32_t NumLfeChannelElements = br.getBits(2); |
| const int32_t NumAssocDataElements = br.getBits(3); |
| const int32_t NumValidCcElements = br.getBits(4); |
| |
| const int32_t MonoMixdownPresent = br.getBits(1); |
| if (MonoMixdownPresent != 0) { |
| const int32_t MonoMixdownElementNumber = br.getBits(4); |
| } |
| |
| const int32_t StereoMixdownPresent = br.getBits(1); |
| if (StereoMixdownPresent != 0) { |
| const int32_t StereoMixdownElementNumber = br.getBits(4); |
| } |
| |
| const int32_t MatrixMixdownIndexPresent = br.getBits(1); |
| if (MatrixMixdownIndexPresent != 0) { |
| const int32_t MatrixMixdownIndex = br.getBits(2); |
| const int32_t PseudoSurroundEnable = br.getBits(1); |
| } |
| |
| int i; |
| for (i=0; i < NumFrontChannelElements; i++) { |
| const int32_t FrontElementIsCpe = br.getBits(1); |
| const int32_t FrontElementTagSelect = br.getBits(4); |
| channelsNum += FrontElementIsCpe ? 2 : 1; |
| } |
| |
| for (i=0; i < NumSideChannelElements; i++) { |
| const int32_t SideElementIsCpe = br.getBits(1); |
| const int32_t SideElementTagSelect = br.getBits(4); |
| channelsNum += SideElementIsCpe ? 2 : 1; |
| } |
| |
| for (i=0; i < NumBackChannelElements; i++) { |
| const int32_t BackElementIsCpe = br.getBits(1); |
| const int32_t BackElementTagSelect = br.getBits(4); |
| channelsNum += BackElementIsCpe ? 2 : 1; |
| } |
| channelsEffectiveNum = channelsNum; |
| |
| for (i=0; i < NumLfeChannelElements; i++) { |
| const int32_t LfeElementTagSelect = br.getBits(4); |
| channelsNum += 1; |
| } |
| ALOGV("mpeg4 audio channelsNum = %d", channelsNum); |
| ALOGV("mpeg4 audio channelsEffectiveNum = %d", channelsEffectiveNum); |
| numChannels = channelsNum; |
| } |
| } |
| } |
| |
| if (numChannels == 0) { |
| return ERROR_UNSUPPORTED; |
| } |
| |
| int32_t prevSampleRate; |
| CHECK(mLastTrack->meta->findInt32(kKeySampleRate, &prevSampleRate)); |
| |
| if (prevSampleRate != sampleRate) { |
| ALOGV("mpeg4 audio sample rate different from previous setting. " |
| "was: %d, now: %d", prevSampleRate, sampleRate); |
| } |
| |
| mLastTrack->meta->setInt32(kKeySampleRate, sampleRate); |
| |
| int32_t prevChannelCount; |
| CHECK(mLastTrack->meta->findInt32(kKeyChannelCount, &prevChannelCount)); |
| |
| if (prevChannelCount != numChannels) { |
| ALOGV("mpeg4 audio channel count different from previous setting. " |
| "was: %d, now: %d", prevChannelCount, numChannels); |
| } |
| |
| mLastTrack->meta->setInt32(kKeyChannelCount, numChannels); |
| |
| return OK; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| MPEG4Source::MPEG4Source( |
| const sp<MPEG4Extractor> &owner, |
| const sp<MetaData> &format, |
| const sp<DataSource> &dataSource, |
| int32_t timeScale, |
| const sp<SampleTable> &sampleTable, |
| Vector<SidxEntry> &sidx, |
| const Trex *trex, |
| off64_t firstMoofOffset) |
| : mOwner(owner), |
| mFormat(format), |
| mDataSource(dataSource), |
| mTimescale(timeScale), |
| mSampleTable(sampleTable), |
| mCurrentSampleIndex(0), |
| mCurrentFragmentIndex(0), |
| mSegments(sidx), |
| mTrex(trex), |
| mFirstMoofOffset(firstMoofOffset), |
| mCurrentMoofOffset(firstMoofOffset), |
| mCurrentTime(0), |
| mCurrentSampleInfoAllocSize(0), |
| mCurrentSampleInfoSizes(NULL), |
| mCurrentSampleInfoOffsetsAllocSize(0), |
| mCurrentSampleInfoOffsets(NULL), |
| mIsAVC(false), |
| mIsHEVC(false), |
| mNALLengthSize(0), |
| mStarted(false), |
| mGroup(NULL), |
| mBuffer(NULL), |
| mWantsNALFragments(false), |
| mSrcBuffer(NULL) { |
| |
| memset(&mTrackFragmentHeaderInfo, 0, sizeof(mTrackFragmentHeaderInfo)); |
| |
| mFormat->findInt32(kKeyCryptoMode, &mCryptoMode); |
| mDefaultIVSize = 0; |
| mFormat->findInt32(kKeyCryptoDefaultIVSize, &mDefaultIVSize); |
| uint32_t keytype; |
| const void *key; |
| size_t keysize; |
| if (mFormat->findData(kKeyCryptoKey, &keytype, &key, &keysize)) { |
| CHECK(keysize <= 16); |
| memset(mCryptoKey, 0, 16); |
| memcpy(mCryptoKey, key, keysize); |
| } |
| |
| const char *mime; |
| bool success = mFormat->findCString(kKeyMIMEType, &mime); |
| CHECK(success); |
| |
| mIsAVC = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); |
| mIsHEVC = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC); |
| |
| if (mIsAVC) { |
| uint32_t type; |
| const void *data; |
| size_t size; |
| CHECK(format->findData(kKeyAVCC, &type, &data, &size)); |
| |
| const uint8_t *ptr = (const uint8_t *)data; |
| |
| CHECK(size >= 7); |
| CHECK_EQ((unsigned)ptr[0], 1u); // configurationVersion == 1 |
| |
| // The number of bytes used to encode the length of a NAL unit. |
| mNALLengthSize = 1 + (ptr[4] & 3); |
| } else if (mIsHEVC) { |
| uint32_t type; |
| const void *data; |
| size_t size; |
| CHECK(format->findData(kKeyHVCC, &type, &data, &size)); |
| |
| const uint8_t *ptr = (const uint8_t *)data; |
| |
| CHECK(size >= 7); |
| CHECK_EQ((unsigned)ptr[0], 1u); // configurationVersion == 1 |
| |
| mNALLengthSize = 1 + (ptr[14 + 7] & 3); |
| } |
| |
| CHECK(format->findInt32(kKeyTrackID, &mTrackId)); |
| |
| if (mFirstMoofOffset != 0) { |
| off64_t offset = mFirstMoofOffset; |
| parseChunk(&offset); |
| } |
| } |
| |
| MPEG4Source::~MPEG4Source() { |
| if (mStarted) { |
| stop(); |
| } |
| free(mCurrentSampleInfoSizes); |
| free(mCurrentSampleInfoOffsets); |
| } |
| |
| status_t MPEG4Source::start(MetaData *params) { |
| Mutex::Autolock autoLock(mLock); |
| |
| CHECK(!mStarted); |
| |
| int32_t val; |
| if (params && params->findInt32(kKeyWantsNALFragments, &val) |
| && val != 0) { |
| mWantsNALFragments = true; |
| } else { |
| mWantsNALFragments = false; |
| } |
| |
| mGroup = new MediaBufferGroup; |
| |
| int32_t max_size; |
| CHECK(mFormat->findInt32(kKeyMaxInputSize, &max_size)); |
| |
| mGroup->add_buffer(new MediaBuffer(max_size)); |
| |
| mSrcBuffer = new (std::nothrow) uint8_t[max_size]; |
| if (mSrcBuffer == NULL) { |
| // file probably specified a bad max size |
| return ERROR_MALFORMED; |
| } |
| |
| mStarted = true; |
| |
| return OK; |
| } |
| |
| status_t MPEG4Source::stop() { |
| Mutex::Autolock autoLock(mLock); |
| |
| CHECK(mStarted); |
| |
| if (mBuffer != NULL) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| delete[] mSrcBuffer; |
| mSrcBuffer = NULL; |
| |
| delete mGroup; |
| mGroup = NULL; |
| |
| mStarted = false; |
| mCurrentSampleIndex = 0; |
| |
| return OK; |
| } |
| |
| status_t MPEG4Source::parseChunk(off64_t *offset) { |
| uint32_t hdr[2]; |
| if (mDataSource->readAt(*offset, hdr, 8) < 8) { |
| return ERROR_IO; |
| } |
| uint64_t chunk_size = ntohl(hdr[0]); |
| uint32_t chunk_type = ntohl(hdr[1]); |
| off64_t data_offset = *offset + 8; |
| |
| if (chunk_size == 1) { |
| if (mDataSource->readAt(*offset + 8, &chunk_size, 8) < 8) { |
| return ERROR_IO; |
| } |
| chunk_size = ntoh64(chunk_size); |
| data_offset += 8; |
| |
| if (chunk_size < 16) { |
| // The smallest valid chunk is 16 bytes long in this case. |
| return ERROR_MALFORMED; |
| } |
| } else if (chunk_size < 8) { |
| // The smallest valid chunk is 8 bytes long. |
| return ERROR_MALFORMED; |
| } |
| |
| char chunk[5]; |
| MakeFourCCString(chunk_type, chunk); |
| ALOGV("MPEG4Source chunk %s @ %llx", chunk, *offset); |
| |
| off64_t chunk_data_size = *offset + chunk_size - data_offset; |
| |
| switch(chunk_type) { |
| |
| case FOURCC('t', 'r', 'a', 'f'): |
| case FOURCC('m', 'o', 'o', 'f'): { |
| off64_t stop_offset = *offset + chunk_size; |
| *offset = data_offset; |
| while (*offset < stop_offset) { |
| status_t err = parseChunk(offset); |
| if (err != OK) { |
| return err; |
| } |
| } |
| if (chunk_type == FOURCC('m', 'o', 'o', 'f')) { |
| // *offset points to the box following this moof. Find the next moof from there. |
| |
| while (true) { |
| if (mDataSource->readAt(*offset, hdr, 8) < 8) { |
| return ERROR_END_OF_STREAM; |
| } |
| chunk_size = ntohl(hdr[0]); |
| chunk_type = ntohl(hdr[1]); |
| if (chunk_type == FOURCC('m', 'o', 'o', 'f')) { |
| mNextMoofOffset = *offset; |
| break; |
| } |
| *offset += chunk_size; |
| } |
| } |
| break; |
| } |
| |
| case FOURCC('t', 'f', 'h', 'd'): { |
| status_t err; |
| if ((err = parseTrackFragmentHeader(data_offset, chunk_data_size)) != OK) { |
| return err; |
| } |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('t', 'r', 'u', 'n'): { |
| status_t err; |
| if (mLastParsedTrackId == mTrackId) { |
| if ((err = parseTrackFragmentRun(data_offset, chunk_data_size)) != OK) { |
| return err; |
| } |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 'a', 'i', 'z'): { |
| status_t err; |
| if ((err = parseSampleAuxiliaryInformationSizes(data_offset, chunk_data_size)) != OK) { |
| return err; |
| } |
| *offset += chunk_size; |
| break; |
| } |
| case FOURCC('s', 'a', 'i', 'o'): { |
| status_t err; |
| if ((err = parseSampleAuxiliaryInformationOffsets(data_offset, chunk_data_size)) != OK) { |
| return err; |
| } |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('m', 'd', 'a', 't'): { |
| // parse DRM info if present |
| ALOGV("MPEG4Source::parseChunk mdat"); |
| // if saiz/saoi was previously observed, do something with the sampleinfos |
| *offset += chunk_size; |
| break; |
| } |
| |
| default: { |
| *offset += chunk_size; |
| break; |
| } |
| } |
| return OK; |
| } |
| |
| status_t MPEG4Source::parseSampleAuxiliaryInformationSizes( |
| off64_t offset, off64_t /* size */) { |
| ALOGV("parseSampleAuxiliaryInformationSizes"); |
| // 14496-12 8.7.12 |
| uint8_t version; |
| if (mDataSource->readAt( |
| offset, &version, sizeof(version)) |
| < (ssize_t)sizeof(version)) { |
| return ERROR_IO; |
| } |
| |
| if (version != 0) { |
| return ERROR_UNSUPPORTED; |
| } |
| offset++; |
| |
| uint32_t flags; |
| if (!mDataSource->getUInt24(offset, &flags)) { |
| return ERROR_IO; |
| } |
| offset += 3; |
| |
| if (flags & 1) { |
| uint32_t tmp; |
| if (!mDataSource->getUInt32(offset, &tmp)) { |
| return ERROR_MALFORMED; |
| } |
| mCurrentAuxInfoType = tmp; |
| offset += 4; |
| if (!mDataSource->getUInt32(offset, &tmp)) { |
| return ERROR_MALFORMED; |
| } |
| mCurrentAuxInfoTypeParameter = tmp; |
| offset += 4; |
| } |
| |
| uint8_t defsize; |
| if (mDataSource->readAt(offset, &defsize, 1) != 1) { |
| return ERROR_MALFORMED; |
| } |
| mCurrentDefaultSampleInfoSize = defsize; |
| offset++; |
| |
| uint32_t smplcnt; |
| if (!mDataSource->getUInt32(offset, &smplcnt)) { |
| return ERROR_MALFORMED; |
| } |
| mCurrentSampleInfoCount = smplcnt; |
| offset += 4; |
| |
| if (mCurrentDefaultSampleInfoSize != 0) { |
| ALOGV("@@@@ using default sample info size of %d", mCurrentDefaultSampleInfoSize); |
| return OK; |
| } |
| if (smplcnt > mCurrentSampleInfoAllocSize) { |
| mCurrentSampleInfoSizes = (uint8_t*) realloc(mCurrentSampleInfoSizes, smplcnt); |
| mCurrentSampleInfoAllocSize = smplcnt; |
| } |
| |
| mDataSource->readAt(offset, mCurrentSampleInfoSizes, smplcnt); |
| return OK; |
| } |
| |
| status_t MPEG4Source::parseSampleAuxiliaryInformationOffsets( |
| off64_t offset, off64_t /* size */) { |
| ALOGV("parseSampleAuxiliaryInformationOffsets"); |
| // 14496-12 8.7.13 |
| uint8_t version; |
| if (mDataSource->readAt(offset, &version, sizeof(version)) != 1) { |
| return ERROR_IO; |
| } |
| offset++; |
| |
| uint32_t flags; |
| if (!mDataSource->getUInt24(offset, &flags)) { |
| return ERROR_IO; |
| } |
| offset += 3; |
| |
| uint32_t entrycount; |
| if (!mDataSource->getUInt32(offset, &entrycount)) { |
| return ERROR_IO; |
| } |
| offset += 4; |
| |
| if (entrycount > mCurrentSampleInfoOffsetsAllocSize) { |
| mCurrentSampleInfoOffsets = (uint64_t*) realloc(mCurrentSampleInfoOffsets, entrycount * 8); |
| mCurrentSampleInfoOffsetsAllocSize = entrycount; |
| } |
| mCurrentSampleInfoOffsetCount = entrycount; |
| |
| for (size_t i = 0; i < entrycount; i++) { |
| if (version == 0) { |
| uint32_t tmp; |
| if (!mDataSource->getUInt32(offset, &tmp)) { |
| return ERROR_IO; |
| } |
| mCurrentSampleInfoOffsets[i] = tmp; |
| offset += 4; |
| } else { |
| uint64_t tmp; |
| if (!mDataSource->getUInt64(offset, &tmp)) { |
| return ERROR_IO; |
| } |
| mCurrentSampleInfoOffsets[i] = tmp; |
| offset += 8; |
| } |
| } |
| |
| // parse clear/encrypted data |
| |
| off64_t drmoffset = mCurrentSampleInfoOffsets[0]; // from moof |
| |
| drmoffset += mCurrentMoofOffset; |
| int ivlength; |
| CHECK(mFormat->findInt32(kKeyCryptoDefaultIVSize, &ivlength)); |
| |
| // read CencSampleAuxiliaryDataFormats |
| for (size_t i = 0; i < mCurrentSampleInfoCount; i++) { |
| Sample *smpl = &mCurrentSamples.editItemAt(i); |
| |
| memset(smpl->iv, 0, 16); |
| if (mDataSource->readAt(drmoffset, smpl->iv, ivlength) != ivlength) { |
| return ERROR_IO; |
| } |
| |
| drmoffset += ivlength; |
| |
| int32_t smplinfosize = mCurrentDefaultSampleInfoSize; |
| if (smplinfosize == 0) { |
| smplinfosize = mCurrentSampleInfoSizes[i]; |
| } |
| if (smplinfosize > ivlength) { |
| uint16_t numsubsamples; |
| if (!mDataSource->getUInt16(drmoffset, &numsubsamples)) { |
| return ERROR_IO; |
| } |
| drmoffset += 2; |
| for (size_t j = 0; j < numsubsamples; j++) { |
| uint16_t numclear; |
| uint32_t numencrypted; |
| if (!mDataSource->getUInt16(drmoffset, &numclear)) { |
| return ERROR_IO; |
| } |
| drmoffset += 2; |
| if (!mDataSource->getUInt32(drmoffset, &numencrypted)) { |
| return ERROR_IO; |
| } |
| drmoffset += 4; |
| smpl->clearsizes.add(numclear); |
| smpl->encryptedsizes.add(numencrypted); |
| } |
| } else { |
| smpl->clearsizes.add(0); |
| smpl->encryptedsizes.add(smpl->size); |
| } |
| } |
| |
| |
| return OK; |
| } |
| |
| status_t MPEG4Source::parseTrackFragmentHeader(off64_t offset, off64_t size) { |
| |
| if (size < 8) { |
| return -EINVAL; |
| } |
| |
| uint32_t flags; |
| if (!mDataSource->getUInt32(offset, &flags)) { // actually version + flags |
| return ERROR_MALFORMED; |
| } |
| |
| if (flags & 0xff000000) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset + 4, (uint32_t*)&mLastParsedTrackId)) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mLastParsedTrackId != mTrackId) { |
| // this is not the right track, skip it |
| return OK; |
| } |
| |
| mTrackFragmentHeaderInfo.mFlags = flags; |
| mTrackFragmentHeaderInfo.mTrackID = mLastParsedTrackId; |
| offset += 8; |
| size -= 8; |
| |
| ALOGV("fragment header: %08x %08x", flags, mTrackFragmentHeaderInfo.mTrackID); |
| |
| if (flags & TrackFragmentHeaderInfo::kBaseDataOffsetPresent) { |
| if (size < 8) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt64(offset, &mTrackFragmentHeaderInfo.mBaseDataOffset)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 8; |
| size -= 8; |
| } |
| |
| if (flags & TrackFragmentHeaderInfo::kSampleDescriptionIndexPresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mSampleDescriptionIndex)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| } |
| |
| if (flags & TrackFragmentHeaderInfo::kDefaultSampleDurationPresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleDuration)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| } |
| |
| if (flags & TrackFragmentHeaderInfo::kDefaultSampleSizePresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleSize)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| } |
| |
| if (flags & TrackFragmentHeaderInfo::kDefaultSampleFlagsPresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset, &mTrackFragmentHeaderInfo.mDefaultSampleFlags)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| } |
| |
| if (!(flags & TrackFragmentHeaderInfo::kBaseDataOffsetPresent)) { |
| mTrackFragmentHeaderInfo.mBaseDataOffset = mCurrentMoofOffset; |
| } |
| |
| mTrackFragmentHeaderInfo.mDataOffset = 0; |
| return OK; |
| } |
| |
| status_t MPEG4Source::parseTrackFragmentRun(off64_t offset, off64_t size) { |
| |
| ALOGV("MPEG4Extractor::parseTrackFragmentRun"); |
| if (size < 8) { |
| return -EINVAL; |
| } |
| |
| enum { |
| kDataOffsetPresent = 0x01, |
| kFirstSampleFlagsPresent = 0x04, |
| kSampleDurationPresent = 0x100, |
| kSampleSizePresent = 0x200, |
| kSampleFlagsPresent = 0x400, |
| kSampleCompositionTimeOffsetPresent = 0x800, |
| }; |
| |
| uint32_t flags; |
| if (!mDataSource->getUInt32(offset, &flags)) { |
| return ERROR_MALFORMED; |
| } |
| ALOGV("fragment run flags: %08x", flags); |
| |
| if (flags & 0xff000000) { |
| return -EINVAL; |
| } |
| |
| if ((flags & kFirstSampleFlagsPresent) && (flags & kSampleFlagsPresent)) { |
| // These two shall not be used together. |
| return -EINVAL; |
| } |
| |
| uint32_t sampleCount; |
| if (!mDataSource->getUInt32(offset + 4, &sampleCount)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 8; |
| size -= 8; |
| |
| uint64_t dataOffset = mTrackFragmentHeaderInfo.mDataOffset; |
| |
| uint32_t firstSampleFlags = 0; |
| |
| if (flags & kDataOffsetPresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| int32_t dataOffsetDelta; |
| if (!mDataSource->getUInt32(offset, (uint32_t*)&dataOffsetDelta)) { |
| return ERROR_MALFORMED; |
| } |
| |
| dataOffset = mTrackFragmentHeaderInfo.mBaseDataOffset + dataOffsetDelta; |
| |
| offset += 4; |
| size -= 4; |
| } |
| |
| if (flags & kFirstSampleFlagsPresent) { |
| if (size < 4) { |
| return -EINVAL; |
| } |
| |
| if (!mDataSource->getUInt32(offset, &firstSampleFlags)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| size -= 4; |
| } |
| |
| uint32_t sampleDuration = 0, sampleSize = 0, sampleFlags = 0, |
| sampleCtsOffset = 0; |
| |
| size_t bytesPerSample = 0; |
| if (flags & kSampleDurationPresent) { |
| bytesPerSample += 4; |
| } else if (mTrackFragmentHeaderInfo.mFlags |
| & TrackFragmentHeaderInfo::kDefaultSampleDurationPresent) { |
| sampleDuration = mTrackFragmentHeaderInfo.mDefaultSampleDuration; |
| } else if (mTrex) { |
| sampleDuration = mTrex->default_sample_duration; |
| } |
| |
| if (flags & kSampleSizePresent) { |
| bytesPerSample += 4; |
| } else if (mTrackFragmentHeaderInfo.mFlags |
| & TrackFragmentHeaderInfo::kDefaultSampleSizePresent) { |
| sampleSize = mTrackFragmentHeaderInfo.mDefaultSampleSize; |
| } else { |
| sampleSize = mTrackFragmentHeaderInfo.mDefaultSampleSize; |
| } |
| |
| if (flags & kSampleFlagsPresent) { |
| bytesPerSample += 4; |
| } else if (mTrackFragmentHeaderInfo.mFlags |
| & TrackFragmentHeaderInfo::kDefaultSampleFlagsPresent) { |
| sampleFlags = mTrackFragmentHeaderInfo.mDefaultSampleFlags; |
| } else { |
| sampleFlags = mTrackFragmentHeaderInfo.mDefaultSampleFlags; |
| } |
| |
| if (flags & kSampleCompositionTimeOffsetPresent) { |
| bytesPerSample += 4; |
| } else { |
| sampleCtsOffset = 0; |
| } |
| |
| if (size < (off64_t)sampleCount * bytesPerSample) { |
| return -EINVAL; |
| } |
| |
| Sample tmp; |
| for (uint32_t i = 0; i < sampleCount; ++i) { |
| if (flags & kSampleDurationPresent) { |
| if (!mDataSource->getUInt32(offset, &sampleDuration)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| } |
| |
| if (flags & kSampleSizePresent) { |
| if (!mDataSource->getUInt32(offset, &sampleSize)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| } |
| |
| if (flags & kSampleFlagsPresent) { |
| if (!mDataSource->getUInt32(offset, &sampleFlags)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| } |
| |
| if (flags & kSampleCompositionTimeOffsetPresent) { |
| if (!mDataSource->getUInt32(offset, &sampleCtsOffset)) { |
| return ERROR_MALFORMED; |
| } |
| offset += 4; |
| } |
| |
| ALOGV("adding sample %d at offset 0x%08" PRIx64 ", size %u, duration %u, " |
| " flags 0x%08x", i + 1, |
| dataOffset, sampleSize, sampleDuration, |
| (flags & kFirstSampleFlagsPresent) && i == 0 |
| ? firstSampleFlags : sampleFlags); |
| tmp.offset = dataOffset; |
| tmp.size = sampleSize; |
| tmp.duration = sampleDuration; |
| tmp.compositionOffset = sampleCtsOffset; |
| mCurrentSamples.add(tmp); |
| |
| dataOffset += sampleSize; |
| } |
| |
| mTrackFragmentHeaderInfo.mDataOffset = dataOffset; |
| |
| return OK; |
| } |
| |
| sp<MetaData> MPEG4Source::getFormat() { |
| Mutex::Autolock autoLock(mLock); |
| |
| return mFormat; |
| } |
| |
| size_t MPEG4Source::parseNALSize(const uint8_t *data) const { |
| switch (mNALLengthSize) { |
| case 1: |
| return *data; |
| case 2: |
| return U16_AT(data); |
| case 3: |
| return ((size_t)data[0] << 16) | U16_AT(&data[1]); |
| case 4: |
| return U32_AT(data); |
| } |
| |
| // This cannot happen, mNALLengthSize springs to life by adding 1 to |
| // a 2-bit integer. |
| CHECK(!"Should not be here."); |
| |
| return 0; |
| } |
| |
| status_t MPEG4Source::read( |
| MediaBuffer **out, const ReadOptions *options) { |
| Mutex::Autolock autoLock(mLock); |
| |
| CHECK(mStarted); |
| |
| if (mFirstMoofOffset > 0) { |
| return fragmentedRead(out, options); |
| } |
| |
| *out = NULL; |
| |
| int64_t targetSampleTimeUs = -1; |
| |
| int64_t seekTimeUs; |
| ReadOptions::SeekMode mode; |
| if (options && options->getSeekTo(&seekTimeUs, &mode)) { |
| uint32_t findFlags = 0; |
| switch (mode) { |
| case ReadOptions::SEEK_PREVIOUS_SYNC: |
| findFlags = SampleTable::kFlagBefore; |
| break; |
| case ReadOptions::SEEK_NEXT_SYNC: |
| findFlags = SampleTable::kFlagAfter; |
| break; |
| case ReadOptions::SEEK_CLOSEST_SYNC: |
| case ReadOptions::SEEK_CLOSEST: |
| findFlags = SampleTable::kFlagClosest; |
| break; |
| default: |
| CHECK(!"Should not be here."); |
| break; |
| } |
| |
| uint32_t sampleIndex; |
| status_t err = mSampleTable->findSampleAtTime( |
| seekTimeUs, 1000000, mTimescale, |
| &sampleIndex, findFlags); |
| |
| if (mode == ReadOptions::SEEK_CLOSEST) { |
| // We found the closest sample already, now we want the sync |
| // sample preceding it (or the sample itself of course), even |
| // if the subsequent sync sample is closer. |
| findFlags = SampleTable::kFlagBefore; |
| } |
| |
| uint32_t syncSampleIndex; |
| if (err == OK) { |
| err = mSampleTable->findSyncSampleNear( |
| sampleIndex, &syncSampleIndex, findFlags); |
| } |
| |
| uint32_t sampleTime; |
| if (err == OK) { |
| err = mSampleTable->getMetaDataForSample( |
| sampleIndex, NULL, NULL, &sampleTime); |
| } |
| |
| if (err != OK) { |
| if (err == ERROR_OUT_OF_RANGE) { |
| // An attempt to seek past the end of the stream would |
| // normally cause this ERROR_OUT_OF_RANGE error. Propagating |
| // this all the way to the MediaPlayer would cause abnormal |
| // termination. Legacy behaviour appears to be to behave as if |
| // we had seeked to the end of stream, ending normally. |
| err = ERROR_END_OF_STREAM; |
| } |
| ALOGV("end of stream"); |
| return err; |
| } |
| |
| if (mode == ReadOptions::SEEK_CLOSEST) { |
| targetSampleTimeUs = (sampleTime * 1000000ll) / mTimescale; |
| } |
| |
| #if 0 |
| uint32_t syncSampleTime; |
| CHECK_EQ(OK, mSampleTable->getMetaDataForSample( |
| syncSampleIndex, NULL, NULL, &syncSampleTime)); |
| |
| ALOGI("seek to time %lld us => sample at time %lld us, " |
| "sync sample at time %lld us", |
| seekTimeUs, |
| sampleTime * 1000000ll / mTimescale, |
| syncSampleTime * 1000000ll / mTimescale); |
| #endif |
| |
| mCurrentSampleIndex = syncSampleIndex; |
| if (mBuffer != NULL) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| // fall through |
| } |
| |
| off64_t offset; |
| size_t size; |
| uint32_t cts, stts; |
| bool isSyncSample; |
| bool newBuffer = false; |
| if (mBuffer == NULL) { |
| newBuffer = true; |
| |
| status_t err = |
| mSampleTable->getMetaDataForSample( |
| mCurrentSampleIndex, &offset, &size, &cts, &isSyncSample, &stts); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| err = mGroup->acquire_buffer(&mBuffer); |
| |
| if (err != OK) { |
| CHECK(mBuffer == NULL); |
| return err; |
| } |
| } |
| |
| if ((!mIsAVC && !mIsHEVC) || mWantsNALFragments) { |
| if (newBuffer) { |
| ssize_t num_bytes_read = |
| mDataSource->readAt(offset, (uint8_t *)mBuffer->data(), size); |
| |
| if (num_bytes_read < (ssize_t)size) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| return ERROR_IO; |
| } |
| |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, size); |
| mBuffer->meta_data()->clear(); |
| mBuffer->meta_data()->setInt64( |
| kKeyTime, ((int64_t)cts * 1000000) / mTimescale); |
| mBuffer->meta_data()->setInt64( |
| kKeyDuration, ((int64_t)stts * 1000000) / mTimescale); |
| |
| if (targetSampleTimeUs >= 0) { |
| mBuffer->meta_data()->setInt64( |
| kKeyTargetTime, targetSampleTimeUs); |
| } |
| |
| if (isSyncSample) { |
| mBuffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| } |
| |
| ++mCurrentSampleIndex; |
| } |
| |
| if (!mIsAVC && !mIsHEVC) { |
| *out = mBuffer; |
| mBuffer = NULL; |
| |
| return OK; |
| } |
| |
| // Each NAL unit is split up into its constituent fragments and |
| // each one of them returned in its own buffer. |
| |
| CHECK(mBuffer->range_length() >= mNALLengthSize); |
| |
| const uint8_t *src = |
| (const uint8_t *)mBuffer->data() + mBuffer->range_offset(); |
| |
| size_t nal_size = parseNALSize(src); |
| if (mBuffer->range_length() < mNALLengthSize + nal_size) { |
| ALOGE("incomplete NAL unit."); |
| |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| return ERROR_MALFORMED; |
| } |
| |
| MediaBuffer *clone = mBuffer->clone(); |
| CHECK(clone != NULL); |
| clone->set_range(mBuffer->range_offset() + mNALLengthSize, nal_size); |
| |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range( |
| mBuffer->range_offset() + mNALLengthSize + nal_size, |
| mBuffer->range_length() - mNALLengthSize - nal_size); |
| |
| if (mBuffer->range_length() == 0) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| *out = clone; |
| |
| return OK; |
| } else { |
| // Whole NAL units are returned but each fragment is prefixed by |
| // the start code (0x00 00 00 01). |
| ssize_t num_bytes_read = 0; |
| int32_t drm = 0; |
| bool usesDRM = (mFormat->findInt32(kKeyIsDRM, &drm) && drm != 0); |
| if (usesDRM) { |
| num_bytes_read = |
| mDataSource->readAt(offset, (uint8_t*)mBuffer->data(), size); |
| } else { |
| num_bytes_read = mDataSource->readAt(offset, mSrcBuffer, size); |
| } |
| |
| if (num_bytes_read < (ssize_t)size) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| return ERROR_IO; |
| } |
| |
| if (usesDRM) { |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, size); |
| |
| } else { |
| uint8_t *dstData = (uint8_t *)mBuffer->data(); |
| size_t srcOffset = 0; |
| size_t dstOffset = 0; |
| |
| while (srcOffset < size) { |
| bool isMalFormed = !isInRange((size_t)0u, size, srcOffset, mNALLengthSize); |
| size_t nalLength = 0; |
| if (!isMalFormed) { |
| nalLength = parseNALSize(&mSrcBuffer[srcOffset]); |
| srcOffset += mNALLengthSize; |
| isMalFormed = !isInRange((size_t)0u, size, srcOffset, nalLength); |
| } |
| |
| if (isMalFormed) { |
| ALOGE("Video is malformed"); |
| mBuffer->release(); |
| mBuffer = NULL; |
| return ERROR_MALFORMED; |
| } |
| |
| if (nalLength == 0) { |
| continue; |
| } |
| |
| CHECK(dstOffset + 4 <= mBuffer->size()); |
| |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 1; |
| memcpy(&dstData[dstOffset], &mSrcBuffer[srcOffset], nalLength); |
| srcOffset += nalLength; |
| dstOffset += nalLength; |
| } |
| CHECK_EQ(srcOffset, size); |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, dstOffset); |
| } |
| |
| mBuffer->meta_data()->clear(); |
| mBuffer->meta_data()->setInt64( |
| kKeyTime, ((int64_t)cts * 1000000) / mTimescale); |
| mBuffer->meta_data()->setInt64( |
| kKeyDuration, ((int64_t)stts * 1000000) / mTimescale); |
| |
| if (targetSampleTimeUs >= 0) { |
| mBuffer->meta_data()->setInt64( |
| kKeyTargetTime, targetSampleTimeUs); |
| } |
| |
| if (isSyncSample) { |
| mBuffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| } |
| |
| ++mCurrentSampleIndex; |
| |
| *out = mBuffer; |
| mBuffer = NULL; |
| |
| return OK; |
| } |
| } |
| |
| status_t MPEG4Source::fragmentedRead( |
| MediaBuffer **out, const ReadOptions *options) { |
| |
| ALOGV("MPEG4Source::fragmentedRead"); |
| |
| CHECK(mStarted); |
| |
| *out = NULL; |
| |
| int64_t targetSampleTimeUs = -1; |
| |
| int64_t seekTimeUs; |
| ReadOptions::SeekMode mode; |
| if (options && options->getSeekTo(&seekTimeUs, &mode)) { |
| |
| int numSidxEntries = mSegments.size(); |
| if (numSidxEntries != 0) { |
| int64_t totalTime = 0; |
| off64_t totalOffset = mFirstMoofOffset; |
| for (int i = 0; i < numSidxEntries; i++) { |
| const SidxEntry *se = &mSegments[i]; |
| if (totalTime + se->mDurationUs > seekTimeUs) { |
| // The requested time is somewhere in this segment |
| if ((mode == ReadOptions::SEEK_NEXT_SYNC && seekTimeUs > totalTime) || |
| (mode == ReadOptions::SEEK_CLOSEST_SYNC && |
| (seekTimeUs - totalTime) > (totalTime + se->mDurationUs - seekTimeUs))) { |
| // requested next sync, or closest sync and it was closer to the end of |
| // this segment |
| totalTime += se->mDurationUs; |
| totalOffset += se->mSize; |
| } |
| break; |
| } |
| totalTime += se->mDurationUs; |
| totalOffset += se->mSize; |
| } |
| mCurrentMoofOffset = totalOffset; |
| mCurrentSamples.clear(); |
| mCurrentSampleIndex = 0; |
| parseChunk(&totalOffset); |
| mCurrentTime = totalTime * mTimescale / 1000000ll; |
| } else { |
| // without sidx boxes, we can only seek to 0 |
| mCurrentMoofOffset = mFirstMoofOffset; |
| mCurrentSamples.clear(); |
| mCurrentSampleIndex = 0; |
| off64_t tmp = mCurrentMoofOffset; |
| parseChunk(&tmp); |
| mCurrentTime = 0; |
| } |
| |
| if (mBuffer != NULL) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| // fall through |
| } |
| |
| off64_t offset = 0; |
| size_t size = 0; |
| uint32_t cts = 0; |
| bool isSyncSample = false; |
| bool newBuffer = false; |
| if (mBuffer == NULL) { |
| newBuffer = true; |
| |
| if (mCurrentSampleIndex >= mCurrentSamples.size()) { |
| // move to next fragment if there is one |
| if (mNextMoofOffset <= mCurrentMoofOffset) { |
| return ERROR_END_OF_STREAM; |
| } |
| off64_t nextMoof = mNextMoofOffset; |
| mCurrentMoofOffset = nextMoof; |
| mCurrentSamples.clear(); |
| mCurrentSampleIndex = 0; |
| parseChunk(&nextMoof); |
| if (mCurrentSampleIndex >= mCurrentSamples.size()) { |
| return ERROR_END_OF_STREAM; |
| } |
| } |
| |
| const Sample *smpl = &mCurrentSamples[mCurrentSampleIndex]; |
| offset = smpl->offset; |
| size = smpl->size; |
| cts = mCurrentTime + smpl->compositionOffset; |
| mCurrentTime += smpl->duration; |
| isSyncSample = (mCurrentSampleIndex == 0); // XXX |
| |
| status_t err = mGroup->acquire_buffer(&mBuffer); |
| |
| if (err != OK) { |
| CHECK(mBuffer == NULL); |
| ALOGV("acquire_buffer returned %d", err); |
| return err; |
| } |
| } |
| |
| const Sample *smpl = &mCurrentSamples[mCurrentSampleIndex]; |
| const sp<MetaData> bufmeta = mBuffer->meta_data(); |
| bufmeta->clear(); |
| if (smpl->encryptedsizes.size()) { |
| // store clear/encrypted lengths in metadata |
| bufmeta->setData(kKeyPlainSizes, 0, |
| smpl->clearsizes.array(), smpl->clearsizes.size() * 4); |
| bufmeta->setData(kKeyEncryptedSizes, 0, |
| smpl->encryptedsizes.array(), smpl->encryptedsizes.size() * 4); |
| bufmeta->setData(kKeyCryptoIV, 0, smpl->iv, 16); // use 16 or the actual size? |
| bufmeta->setInt32(kKeyCryptoDefaultIVSize, mDefaultIVSize); |
| bufmeta->setInt32(kKeyCryptoMode, mCryptoMode); |
| bufmeta->setData(kKeyCryptoKey, 0, mCryptoKey, 16); |
| } |
| |
| if ((!mIsAVC && !mIsHEVC)|| mWantsNALFragments) { |
| if (newBuffer) { |
| ssize_t num_bytes_read = |
| mDataSource->readAt(offset, (uint8_t *)mBuffer->data(), size); |
| |
| if (num_bytes_read < (ssize_t)size) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| ALOGV("i/o error"); |
| return ERROR_IO; |
| } |
| |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, size); |
| mBuffer->meta_data()->setInt64( |
| kKeyTime, ((int64_t)cts * 1000000) / mTimescale); |
| mBuffer->meta_data()->setInt64( |
| kKeyDuration, ((int64_t)smpl->duration * 1000000) / mTimescale); |
| |
| if (targetSampleTimeUs >= 0) { |
| mBuffer->meta_data()->setInt64( |
| kKeyTargetTime, targetSampleTimeUs); |
| } |
| |
| if (isSyncSample) { |
| mBuffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| } |
| |
| ++mCurrentSampleIndex; |
| } |
| |
| if (!mIsAVC && !mIsHEVC) { |
| *out = mBuffer; |
| mBuffer = NULL; |
| |
| return OK; |
| } |
| |
| // Each NAL unit is split up into its constituent fragments and |
| // each one of them returned in its own buffer. |
| |
| CHECK(mBuffer->range_length() >= mNALLengthSize); |
| |
| const uint8_t *src = |
| (const uint8_t *)mBuffer->data() + mBuffer->range_offset(); |
| |
| size_t nal_size = parseNALSize(src); |
| if (mBuffer->range_length() < mNALLengthSize + nal_size) { |
| ALOGE("incomplete NAL unit."); |
| |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| return ERROR_MALFORMED; |
| } |
| |
| MediaBuffer *clone = mBuffer->clone(); |
| CHECK(clone != NULL); |
| clone->set_range(mBuffer->range_offset() + mNALLengthSize, nal_size); |
| |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range( |
| mBuffer->range_offset() + mNALLengthSize + nal_size, |
| mBuffer->range_length() - mNALLengthSize - nal_size); |
| |
| if (mBuffer->range_length() == 0) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| *out = clone; |
| |
| return OK; |
| } else { |
| ALOGV("whole NAL"); |
| // Whole NAL units are returned but each fragment is prefixed by |
| // the start code (0x00 00 00 01). |
| ssize_t num_bytes_read = 0; |
| int32_t drm = 0; |
| bool usesDRM = (mFormat->findInt32(kKeyIsDRM, &drm) && drm != 0); |
| if (usesDRM) { |
| num_bytes_read = |
| mDataSource->readAt(offset, (uint8_t*)mBuffer->data(), size); |
| } else { |
| num_bytes_read = mDataSource->readAt(offset, mSrcBuffer, size); |
| } |
| |
| if (num_bytes_read < (ssize_t)size) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| ALOGV("i/o error"); |
| return ERROR_IO; |
| } |
| |
| if (usesDRM) { |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, size); |
| |
| } else { |
| uint8_t *dstData = (uint8_t *)mBuffer->data(); |
| size_t srcOffset = 0; |
| size_t dstOffset = 0; |
| |
| while (srcOffset < size) { |
| bool isMalFormed = !isInRange((size_t)0u, size, srcOffset, mNALLengthSize); |
| size_t nalLength = 0; |
| if (!isMalFormed) { |
| nalLength = parseNALSize(&mSrcBuffer[srcOffset]); |
| srcOffset += mNALLengthSize; |
| isMalFormed = !isInRange((size_t)0u, size, srcOffset, nalLength); |
| } |
| |
| if (isMalFormed) { |
| ALOGE("Video is malformed"); |
| mBuffer->release(); |
| mBuffer = NULL; |
| return ERROR_MALFORMED; |
| } |
| |
| if (nalLength == 0) { |
| continue; |
| } |
| |
| CHECK(dstOffset + 4 <= mBuffer->size()); |
| |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 0; |
| dstData[dstOffset++] = 1; |
| memcpy(&dstData[dstOffset], &mSrcBuffer[srcOffset], nalLength); |
| srcOffset += nalLength; |
| dstOffset += nalLength; |
| } |
| CHECK_EQ(srcOffset, size); |
| CHECK(mBuffer != NULL); |
| mBuffer->set_range(0, dstOffset); |
| } |
| |
| mBuffer->meta_data()->setInt64( |
| kKeyTime, ((int64_t)cts * 1000000) / mTimescale); |
| mBuffer->meta_data()->setInt64( |
| kKeyDuration, ((int64_t)smpl->duration * 1000000) / mTimescale); |
| |
| if (targetSampleTimeUs >= 0) { |
| mBuffer->meta_data()->setInt64( |
| kKeyTargetTime, targetSampleTimeUs); |
| } |
| |
| if (isSyncSample) { |
| mBuffer->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| } |
| |
| ++mCurrentSampleIndex; |
| |
| *out = mBuffer; |
| mBuffer = NULL; |
| |
| return OK; |
| } |
| } |
| |
| MPEG4Extractor::Track *MPEG4Extractor::findTrackByMimePrefix( |
| const char *mimePrefix) { |
| for (Track *track = mFirstTrack; track != NULL; track = track->next) { |
| const char *mime; |
| if (track->meta != NULL |
| && track->meta->findCString(kKeyMIMEType, &mime) |
| && !strncasecmp(mime, mimePrefix, strlen(mimePrefix))) { |
| return track; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static bool LegacySniffMPEG4( |
| const sp<DataSource> &source, String8 *mimeType, float *confidence) { |
| uint8_t header[8]; |
| |
| ssize_t n = source->readAt(4, header, sizeof(header)); |
| if (n < (ssize_t)sizeof(header)) { |
| return false; |
| } |
| |
| if (!memcmp(header, "ftyp3gp", 7) || !memcmp(header, "ftypmp42", 8) |
| || !memcmp(header, "ftyp3gr6", 8) || !memcmp(header, "ftyp3gs6", 8) |
| || !memcmp(header, "ftyp3ge6", 8) || !memcmp(header, "ftyp3gg6", 8) |
| || !memcmp(header, "ftypisom", 8) || !memcmp(header, "ftypM4V ", 8) |
| || !memcmp(header, "ftypM4A ", 8) || !memcmp(header, "ftypf4v ", 8) |
| || !memcmp(header, "ftypkddi", 8) || !memcmp(header, "ftypM4VP", 8)) { |
| *mimeType = MEDIA_MIMETYPE_CONTAINER_MPEG4; |
| *confidence = 0.4; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool isCompatibleBrand(uint32_t fourcc) { |
| static const uint32_t kCompatibleBrands[] = { |
| FOURCC('i', 's', 'o', 'm'), |
| FOURCC('i', 's', 'o', '2'), |
| FOURCC('a', 'v', 'c', '1'), |
| FOURCC('h', 'v', 'c', '1'), |
| FOURCC('h', 'e', 'v', '1'), |
| FOURCC('3', 'g', 'p', '4'), |
| FOURCC('m', 'p', '4', '1'), |
| FOURCC('m', 'p', '4', '2'), |
| |
| // Won't promise that the following file types can be played. |
| // Just give these file types a chance. |
| FOURCC('q', 't', ' ', ' '), // Apple's QuickTime |
| FOURCC('M', 'S', 'N', 'V'), // Sony's PSP |
| |
| FOURCC('3', 'g', '2', 'a'), // 3GPP2 |
| FOURCC('3', 'g', '2', 'b'), |
| }; |
| |
| for (size_t i = 0; |
| i < sizeof(kCompatibleBrands) / sizeof(kCompatibleBrands[0]); |
| ++i) { |
| if (kCompatibleBrands[i] == fourcc) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| // Attempt to actually parse the 'ftyp' atom and determine if a suitable |
| // compatible brand is present. |
| // Also try to identify where this file's metadata ends |
| // (end of the 'moov' atom) and report it to the caller as part of |
| // the metadata. |
| static bool BetterSniffMPEG4( |
| const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| sp<AMessage> *meta) { |
| // We scan up to 128 bytes to identify this file as an MP4. |
| static const off64_t kMaxScanOffset = 128ll; |
| |
| off64_t offset = 0ll; |
| bool foundGoodFileType = false; |
| off64_t moovAtomEndOffset = -1ll; |
| bool done = false; |
| |
| while (!done && offset < kMaxScanOffset) { |
| uint32_t hdr[2]; |
| if (source->readAt(offset, hdr, 8) < 8) { |
| return false; |
| } |
| |
| uint64_t chunkSize = ntohl(hdr[0]); |
| uint32_t chunkType = ntohl(hdr[1]); |
| off64_t chunkDataOffset = offset + 8; |
| |
| if (chunkSize == 1) { |
| if (source->readAt(offset + 8, &chunkSize, 8) < 8) { |
| return false; |
| } |
| |
| chunkSize = ntoh64(chunkSize); |
| chunkDataOffset += 8; |
| |
| if (chunkSize < 16) { |
| // The smallest valid chunk is 16 bytes long in this case. |
| return false; |
| } |
| } else if (chunkSize < 8) { |
| // The smallest valid chunk is 8 bytes long. |
| return false; |
| } |
| |
| off64_t chunkDataSize = offset + chunkSize - chunkDataOffset; |
| |
| char chunkstring[5]; |
| MakeFourCCString(chunkType, chunkstring); |
| ALOGV("saw chunk type %s, size %" PRIu64 " @ %lld", chunkstring, chunkSize, offset); |
| switch (chunkType) { |
| case FOURCC('f', 't', 'y', 'p'): |
| { |
| if (chunkDataSize < 8) { |
| return false; |
| } |
| |
| uint32_t numCompatibleBrands = (chunkDataSize - 8) / 4; |
| for (size_t i = 0; i < numCompatibleBrands + 2; ++i) { |
| if (i == 1) { |
| // Skip this index, it refers to the minorVersion, |
| // not a brand. |
| continue; |
| } |
| |
| uint32_t brand; |
| if (source->readAt( |
| chunkDataOffset + 4 * i, &brand, 4) < 4) { |
| return false; |
| } |
| |
| brand = ntohl(brand); |
| |
| if (isCompatibleBrand(brand)) { |
| foundGoodFileType = true; |
| break; |
| } |
| } |
| |
| if (!foundGoodFileType) { |
| return false; |
| } |
| |
| break; |
| } |
| |
| case FOURCC('m', 'o', 'o', 'v'): |
| { |
| moovAtomEndOffset = offset + chunkSize; |
| |
| done = true; |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| offset += chunkSize; |
| } |
| |
| if (!foundGoodFileType) { |
| return false; |
| } |
| |
| *mimeType = MEDIA_MIMETYPE_CONTAINER_MPEG4; |
| *confidence = 0.4f; |
| |
| if (moovAtomEndOffset >= 0) { |
| *meta = new AMessage; |
| (*meta)->setInt64("meta-data-size", moovAtomEndOffset); |
| |
| ALOGV("found metadata size: %lld", moovAtomEndOffset); |
| } |
| |
| return true; |
| } |
| |
| bool SniffMPEG4( |
| const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| sp<AMessage> *meta) { |
| if (BetterSniffMPEG4(source, mimeType, confidence, meta)) { |
| return true; |
| } |
| |
| if (LegacySniffMPEG4(source, mimeType, confidence)) { |
| ALOGW("Identified supported mpeg4 through LegacySniffMPEG4."); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| } // namespace android |