| /* |
| * 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_TAG "MPEG4Extractor" |
| #include <utils/Log.h> |
| |
| #include "include/MPEG4Extractor.h" |
| #include "include/SampleTable.h" |
| |
| #include <arpa/inet.h> |
| |
| #include <ctype.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <media/stagefright/DataSource.h> |
| #include "include/ESDS.h" |
| #include <media/stagefright/MediaBuffer.h> |
| #include <media/stagefright/MediaBufferGroup.h> |
| #include <media/stagefright/MediaDebug.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaSource.h> |
| #include <media/stagefright/MetaData.h> |
| #include <media/stagefright/Utils.h> |
| #include <utils/String8.h> |
| |
| namespace android { |
| |
| class MPEG4Source : public MediaSource { |
| public: |
| // Caller retains ownership of both "dataSource" and "sampleTable". |
| MPEG4Source(const sp<MetaData> &format, |
| const sp<DataSource> &dataSource, |
| int32_t timeScale, |
| const sp<SampleTable> &sampleTable); |
| |
| 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); |
| |
| protected: |
| virtual ~MPEG4Source(); |
| |
| private: |
| Mutex mLock; |
| |
| sp<MetaData> mFormat; |
| sp<DataSource> mDataSource; |
| int32_t mTimescale; |
| sp<SampleTable> mSampleTable; |
| uint32_t mCurrentSampleIndex; |
| |
| bool mIsAVC; |
| size_t mNALLengthSize; |
| |
| bool mStarted; |
| |
| MediaBufferGroup *mGroup; |
| |
| MediaBuffer *mBuffer; |
| |
| bool mWantsNALFragments; |
| |
| uint8_t *mSrcBuffer; |
| |
| size_t parseNALSize(const uint8_t *data) const; |
| |
| 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(off_t offset, void *data, size_t size); |
| virtual status_t getSize(off_t *size); |
| virtual uint32_t flags(); |
| |
| status_t setCachedRange(off_t offset, size_t size); |
| |
| protected: |
| virtual ~MPEG4DataSource(); |
| |
| private: |
| Mutex mLock; |
| |
| sp<DataSource> mSource; |
| off_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(off_t offset, void *data, size_t size) { |
| Mutex::Autolock autoLock(mLock); |
| |
| if (offset >= mCachedOffset |
| && offset + size <= mCachedOffset + mCachedSize) { |
| memcpy(data, &mCache[offset - mCachedOffset], size); |
| return size; |
| } |
| |
| return mSource->readAt(offset, data, size); |
| } |
| |
| status_t MPEG4DataSource::getSize(off_t *size) { |
| return mSource->getSize(size); |
| } |
| |
| uint32_t MPEG4DataSource::flags() { |
| return mSource->flags(); |
| } |
| |
| status_t MPEG4DataSource::setCachedRange(off_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%04x ", 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'): |
| return MEDIA_MIMETYPE_VIDEO_H263; |
| |
| case FOURCC('a', 'v', 'c', '1'): |
| return MEDIA_MIMETYPE_VIDEO_AVC; |
| |
| default: |
| CHECK(!"should not be here."); |
| return NULL; |
| } |
| } |
| |
| MPEG4Extractor::MPEG4Extractor(const sp<DataSource> &source) |
| : mDataSource(source), |
| mHaveMetadata(false), |
| mHasVideo(false), |
| mFirstTrack(NULL), |
| mLastTrack(NULL), |
| mFileMetaData(new MetaData) { |
| } |
| |
| MPEG4Extractor::~MPEG4Extractor() { |
| Track *track = mFirstTrack; |
| while (track) { |
| Track *next = track->next; |
| |
| delete track; |
| track = next; |
| } |
| mFirstTrack = mLastTrack = NULL; |
| } |
| |
| 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) { |
| return 0; |
| } |
| |
| size_t n = 0; |
| Track *track = mFirstTrack; |
| while (track) { |
| ++n; |
| track = track->next; |
| } |
| |
| 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)) { |
| 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; |
| } |
| |
| status_t MPEG4Extractor::readMetaData() { |
| if (mHaveMetadata) { |
| return OK; |
| } |
| |
| off_t offset = 0; |
| status_t err; |
| while ((err = parseChunk(&offset, 0)) == OK) { |
| } |
| |
| if (mHaveMetadata) { |
| if (mHasVideo) { |
| mFileMetaData->setCString(kKeyMIMEType, "video/mp4"); |
| } else { |
| mFileMetaData->setCString(kKeyMIMEType, "audio/mp4"); |
| } |
| |
| return OK; |
| } |
| |
| return err; |
| } |
| |
| 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'; |
| } |
| |
| 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(off_t *offset, int 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]); |
| off_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; |
| } |
| |
| char chunk[5]; |
| MakeFourCCString(chunk_type, chunk); |
| |
| #if 0 |
| static const char kWhitespace[] = " "; |
| const char *indent = &kWhitespace[sizeof(kWhitespace) - 1 - 2 * depth]; |
| printf("%sfound chunk '%s' of size %lld\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); |
| |
| off_t chunk_data_size = *offset + chunk_size - data_offset; |
| |
| if (chunk_type != FOURCC('c', 'p', 'r', 't') |
| && mPath.size() == 5 && underMetaDataPath(mPath)) { |
| off_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('s', 'k', 'i' ,'p'): |
| case FOURCC('u', 'd', 't', 'a'): |
| case FOURCC('i', 'l', 's', 't'): |
| { |
| if (chunk_type == FOURCC('s', 't', 'b', 'l')) { |
| LOGV("sampleTable chunk is %d bytes long.", (size_t)chunk_size); |
| |
| if (mDataSource->flags() & DataSource::kWantsPrefetching) { |
| sp<MPEG4DataSource> cachedSource = |
| new MPEG4DataSource(mDataSource); |
| |
| if (cachedSource->setCachedRange(*offset, chunk_size) == OK) { |
| mDataSource = cachedSource; |
| } |
| } |
| } |
| |
| if (chunk_type == FOURCC('t', 'r', 'a', 'k')) { |
| 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->timescale = 0; |
| track->sampleTable = new SampleTable(mDataSource); |
| track->meta->setCString(kKeyMIMEType, "application/octet-stream"); |
| } |
| |
| off_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 (chunk_type == FOURCC('t', 'r', 'a', 'k')) { |
| status_t err = verifyTrack(mLastTrack); |
| |
| if (err != OK) { |
| return err; |
| } |
| } else if (chunk_type == FOURCC('m', 'o', 'o', 'v')) { |
| mHaveMetadata = true; |
| |
| return UNKNOWN_ERROR; // Return a dummy error. |
| } |
| break; |
| } |
| |
| case FOURCC('t', 'k', 'h', 'd'): |
| { |
| if (chunk_data_size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t version; |
| if (mDataSource->readAt(data_offset, &version, 1) < 1) { |
| return ERROR_IO; |
| } |
| |
| uint64_t ctime, mtime, duration; |
| int32_t id; |
| uint32_t width, height; |
| |
| if (version == 1) { |
| if (chunk_data_size != 36 + 60) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[36 + 60]; |
| if (mDataSource->readAt( |
| data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) { |
| return ERROR_IO; |
| } |
| |
| ctime = U64_AT(&buffer[4]); |
| mtime = U64_AT(&buffer[12]); |
| id = U32_AT(&buffer[20]); |
| duration = U64_AT(&buffer[28]); |
| width = U32_AT(&buffer[88]); |
| height = U32_AT(&buffer[92]); |
| } else if (version == 0) { |
| if (chunk_data_size != 24 + 60) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[24 + 60]; |
| if (mDataSource->readAt( |
| data_offset, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) { |
| return ERROR_IO; |
| } |
| ctime = U32_AT(&buffer[4]); |
| mtime = U32_AT(&buffer[8]); |
| id = U32_AT(&buffer[12]); |
| duration = U32_AT(&buffer[20]); |
| width = U32_AT(&buffer[76]); |
| height = U32_AT(&buffer[80]); |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('m', 'd', 'h', 'd'): |
| { |
| 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; |
| } |
| |
| off_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); |
| |
| int64_t duration; |
| if (version == 1) { |
| if (mDataSource->readAt( |
| timescale_offset + 4, &duration, sizeof(duration)) |
| < (ssize_t)sizeof(duration)) { |
| return ERROR_IO; |
| } |
| duration = ntoh64(duration); |
| } else { |
| int32_t duration32; |
| if (mDataSource->readAt( |
| timescale_offset + 4, &duration32, sizeof(duration32)) |
| < (ssize_t)sizeof(duration32)) { |
| return ERROR_IO; |
| } |
| duration = ntohl(duration32); |
| } |
| mLastTrack->meta->setInt64( |
| kKeyDuration, (duration * 1000000) / mLastTrack->timescale); |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('h', 'd', 'l', 'r'): |
| { |
| if (chunk_data_size < 25) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[24]; |
| if (mDataSource->readAt(data_offset, buffer, 24) < 24) { |
| return ERROR_IO; |
| } |
| |
| if (U32_AT(buffer) != 0) { |
| // Should be version 0, flags 0. |
| return ERROR_MALFORMED; |
| } |
| |
| if (U32_AT(&buffer[4]) != 0) { |
| // pre_defined should be 0. |
| return ERROR_MALFORMED; |
| } |
| |
| mHandlerType = U32_AT(&buffer[8]); |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 'd'): |
| { |
| if (chunk_data_size < 8) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[8]; |
| if (chunk_data_size < (off_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 now we only support a single type of media per track. |
| return ERROR_UNSUPPORTED; |
| } |
| |
| off_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('s', 'a', 'm', 'r'): |
| case FOURCC('s', 'a', 'w', 'b'): |
| { |
| if (mHandlerType != FOURCC('s', 'o', 'u', 'n')) { |
| return ERROR_MALFORMED; |
| } |
| |
| 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]); |
| uint16_t num_channels = U16_AT(&buffer[16]); |
| |
| if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, |
| FourCC2MIME(chunk_type)) |
| || !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, |
| FourCC2MIME(chunk_type))) { |
| // AMR audio is always mono. |
| num_channels = 1; |
| } |
| |
| uint16_t sample_size = U16_AT(&buffer[18]); |
| uint32_t sample_rate = U32_AT(&buffer[24]) >> 16; |
| |
| // printf("*** coding='%s' %d channels, size %d, rate %d\n", |
| // chunk, num_channels, sample_size, sample_rate); |
| |
| mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type)); |
| mLastTrack->meta->setInt32(kKeyChannelCount, num_channels); |
| mLastTrack->meta->setInt32(kKeySampleRate, sample_rate); |
| |
| off_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('s', '2', '6', '3'): |
| case FOURCC('a', 'v', 'c', '1'): |
| { |
| mHasVideo = true; |
| |
| if (mHandlerType != FOURCC('v', 'i', 'd', 'e')) { |
| return ERROR_MALFORMED; |
| } |
| |
| 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]); |
| |
| // printf("*** coding='%s' width=%d height=%d\n", |
| // chunk, width, height); |
| |
| mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type)); |
| mLastTrack->meta->setInt32(kKeyWidth, width); |
| mLastTrack->meta->setInt32(kKeyHeight, height); |
| |
| off_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); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 'c'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setSampleToChunkParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| *offset += chunk_size; |
| 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); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| size_t max_size; |
| CHECK_EQ(mLastTrack->sampleTable->getMaxSampleSize(&max_size), OK); |
| |
| // Assume that a given buffer only contains at most 10 fragments, |
| // each fragment 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 fragment. |
| mLastTrack->meta->setInt32(kKeyMaxInputSize, max_size + 10 * 2); |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 't', 't', 's'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setTimeToSampleParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('s', 't', 's', 's'): |
| { |
| status_t err = |
| mLastTrack->sampleTable->setSyncSampleParams( |
| data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('e', 's', 'd', 's'): |
| { |
| if (chunk_data_size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t buffer[256]; |
| if (chunk_data_size > (off_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; |
| } |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('a', 'v', 'c', 'C'): |
| { |
| char buffer[256]; |
| if (chunk_data_size > (off_t)sizeof(buffer)) { |
| return ERROR_BUFFER_TOO_SMALL; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, chunk_data_size) < chunk_data_size) { |
| return ERROR_IO; |
| } |
| |
| mLastTrack->meta->setData( |
| kKeyAVCC, kTypeAVCC, buffer, chunk_data_size); |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('m', 'e', 't', 'a'): |
| { |
| uint8_t buffer[4]; |
| if (chunk_data_size < (off_t)sizeof(buffer)) { |
| return ERROR_MALFORMED; |
| } |
| |
| if (mDataSource->readAt( |
| data_offset, buffer, 4) < 4) { |
| 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; |
| } |
| |
| off_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('d', 'a', 't', 'a'): |
| { |
| if (mPath.size() == 6 && underMetaDataPath(mPath)) { |
| status_t err = parseMetaData(data_offset, chunk_data_size); |
| |
| if (err != OK) { |
| return err; |
| } |
| } |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| case FOURCC('m', 'v', 'h', 'd'): |
| { |
| if (chunk_data_size < 12) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t header[12]; |
| if (mDataSource->readAt( |
| data_offset, header, sizeof(header)) |
| < (ssize_t)sizeof(header)) { |
| return ERROR_IO; |
| } |
| |
| int64_t creationTime; |
| if (header[0] == 1) { |
| creationTime = U64_AT(&header[4]); |
| } else if (header[0] != 0) { |
| return ERROR_MALFORMED; |
| } else { |
| creationTime = U32_AT(&header[4]); |
| } |
| |
| String8 s; |
| convertTimeToDate(creationTime, &s); |
| |
| mFileMetaData->setCString(kKeyDate, s.string()); |
| |
| *offset += chunk_size; |
| break; |
| } |
| |
| default: |
| { |
| *offset += chunk_size; |
| break; |
| } |
| } |
| |
| return OK; |
| } |
| |
| status_t MPEG4Extractor::parseMetaData(off_t offset, size_t size) { |
| if (size < 4) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint8_t *buffer = new uint8_t[size + 1]; |
| 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; |
| 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('t', 'r', 'k', 'n'): |
| { |
| if (size == 16 && flags == 0) { |
| char tmp[16]; |
| sprintf(tmp, "%d/%d", |
| (int)buffer[size - 5], (int)buffer[size - 3]); |
| |
| mFileMetaData->setCString(kKeyCDTrackNumber, tmp); |
| } |
| break; |
| } |
| case FOURCC('d', 'i', 's', 'k'): |
| { |
| if (size == 14 && flags == 0) { |
| char tmp[16]; |
| sprintf(tmp, "%d/%d", |
| (int)buffer[size - 3], (int)buffer[size - 1]); |
| |
| mFileMetaData->setCString(kKeyDiscNumber, tmp); |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| if (size >= 8 && 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; |
| } |
| |
| 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; |
| } |
| |
| return new MPEG4Source( |
| track->meta, mDataSource, track->timescale, track->sampleTable); |
| } |
| |
| // 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_MPEG4) |
| || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| if (!track->meta->findData(kKeyESDS, &type, &data, &size) |
| || type != kTypeESDS) { |
| return ERROR_MALFORMED; |
| } |
| } |
| |
| return OK; |
| } |
| |
| status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio( |
| const void *esds_data, size_t esds_size) { |
| ESDS esds(esds_data, esds_size); |
| 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 < 2) { |
| return ERROR_MALFORMED; |
| } |
| |
| uint32_t objectType = csd[0] >> 3; |
| |
| if (objectType == 31) { |
| return ERROR_UNSUPPORTED; |
| } |
| |
| uint32_t freqIndex = (csd[0] & 7) << 1 | (csd[1] >> 7); |
| int32_t sampleRate = 0; |
| int32_t numChannels = 0; |
| if (freqIndex == 15) { |
| if (csd_size < 5) { |
| return ERROR_MALFORMED; |
| } |
| |
| sampleRate = (csd[1] & 0x7f) << 17 |
| | csd[2] << 9 |
| | csd[3] << 1 |
| | (csd[4] >> 7); |
| |
| numChannels = (csd[4] >> 3) & 15; |
| } else { |
| static uint32_t kSamplingRate[] = { |
| 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, |
| 16000, 12000, 11025, 8000, 7350 |
| }; |
| |
| if (freqIndex == 13 || freqIndex == 14) { |
| return ERROR_MALFORMED; |
| } |
| |
| sampleRate = kSamplingRate[freqIndex]; |
| numChannels = (csd[1] >> 3) & 15; |
| } |
| |
| if (numChannels == 0) { |
| return ERROR_UNSUPPORTED; |
| } |
| |
| int32_t prevSampleRate; |
| CHECK(mLastTrack->meta->findInt32(kKeySampleRate, &prevSampleRate)); |
| |
| if (prevSampleRate != sampleRate) { |
| LOGV("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) { |
| LOGV("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<MetaData> &format, |
| const sp<DataSource> &dataSource, |
| int32_t timeScale, |
| const sp<SampleTable> &sampleTable) |
| : mFormat(format), |
| mDataSource(dataSource), |
| mTimescale(timeScale), |
| mSampleTable(sampleTable), |
| mCurrentSampleIndex(0), |
| mIsAVC(false), |
| mNALLengthSize(0), |
| mStarted(false), |
| mGroup(NULL), |
| mBuffer(NULL), |
| mWantsNALFragments(false), |
| mSrcBuffer(NULL) { |
| const char *mime; |
| bool success = mFormat->findCString(kKeyMIMEType, &mime); |
| CHECK(success); |
| |
| mIsAVC = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC); |
| |
| 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(ptr[0], 1); // configurationVersion == 1 |
| |
| // The number of bytes used to encode the length of a NAL unit. |
| mNALLengthSize = 1 + (ptr[4] & 3); |
| } |
| } |
| |
| MPEG4Source::~MPEG4Source() { |
| if (mStarted) { |
| stop(); |
| } |
| } |
| |
| 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 uint8_t[max_size]; |
| |
| 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; |
| } |
| |
| 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); |
| |
| *out = NULL; |
| |
| int64_t seekTimeUs; |
| if (options && options->getSeekTo(&seekTimeUs)) { |
| uint32_t sampleIndex; |
| status_t err = mSampleTable->findClosestSample( |
| seekTimeUs * mTimescale / 1000000, |
| &sampleIndex, SampleTable::kSyncSample_Flag); |
| |
| 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; |
| } |
| return err; |
| } |
| |
| mCurrentSampleIndex = sampleIndex; |
| if (mBuffer != NULL) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| } |
| |
| // fall through |
| } |
| |
| off_t offset; |
| size_t size; |
| uint32_t dts; |
| bool newBuffer = false; |
| if (mBuffer == NULL) { |
| newBuffer = true; |
| |
| status_t err = |
| mSampleTable->getMetaDataForSample( |
| mCurrentSampleIndex, &offset, &size, &dts); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| err = mGroup->acquire_buffer(&mBuffer); |
| |
| if (err != OK) { |
| CHECK_EQ(mBuffer, NULL); |
| return err; |
| } |
| } |
| |
| if (!mIsAVC || 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)dts * 1000000) / mTimescale); |
| ++mCurrentSampleIndex; |
| } |
| |
| if (!mIsAVC) { |
| *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) { |
| LOGE("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 = |
| mDataSource->readAt(offset, mSrcBuffer, size); |
| |
| if (num_bytes_read < (ssize_t)size) { |
| mBuffer->release(); |
| mBuffer = NULL; |
| |
| return ERROR_IO; |
| } |
| |
| uint8_t *dstData = (uint8_t *)mBuffer->data(); |
| size_t srcOffset = 0; |
| size_t dstOffset = 0; |
| |
| while (srcOffset < size) { |
| CHECK(srcOffset + mNALLengthSize <= size); |
| size_t nalLength = parseNALSize(&mSrcBuffer[srcOffset]); |
| srcOffset += mNALLengthSize; |
| |
| if (srcOffset + nalLength > size) { |
| 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)dts * 1000000) / mTimescale); |
| ++mCurrentSampleIndex; |
| |
| *out = mBuffer; |
| mBuffer = NULL; |
| |
| return OK; |
| } |
| } |
| |
| bool SniffMPEG4( |
| 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, "ftypisom", 8) || !memcmp(header, "ftypM4V ", 8) |
| || !memcmp(header, "ftypM4A ", 8) || !memcmp(header, "ftypf4v ", 8) |
| || !memcmp(header, "ftypkddi", 8)) { |
| *mimeType = MEDIA_MIMETYPE_CONTAINER_MPEG4; |
| *confidence = 0.1; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| } // namespace android |
| |