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Bug 1185115: P2. replace all stagefright::Vector with nsTArray. r=kentuckyfriedtakahe

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This commit is contained in:
Jean-Yves Avenard 2015-09-12 16:23:08 +10:00
parent c6d67615a2
commit eaa12be10a
4 changed files with 96 additions and 93 deletions
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123
media/libstagefright/frameworks/av/media/libstagefright/MPEG4Extractor.cpp
View File

@ -38,7 +38,6 @@
#include <media/stagefright/MediaSource.h>
#include <media/stagefright/MetaData.h>
#include <utils/String8.h>
#include "nsTArray.h"
static const uint32_t kMAX_ALLOCATION =
(SIZE_MAX < INT32_MAX ? SIZE_MAX : INT32_MAX) - 128;
@ -52,7 +51,7 @@ public:
const sp<DataSource> &dataSource,
int32_t timeScale,
const sp<SampleTable> &sampleTable,
Vector<SidxEntry> &sidx,
nsTArray<SidxEntry> &sidx,
MPEG4Extractor::TrackExtends &trackExtends);
virtual status_t start(MetaData *params = NULL);
@ -76,7 +75,7 @@ private:
sp<SampleTable> mSampleTable;
uint32_t mCurrentSampleIndex;
uint32_t mCurrentFragmentIndex;
Vector<SidxEntry> &mSegments;
nsTArray<SidxEntry> &mSegments;
bool mLookedForMoof;
off64_t mFirstMoofOffset;
off64_t mCurrentMoofOffset;
@ -149,12 +148,12 @@ private:
int32_t ctsOffset;
uint32_t flags;
uint8_t iv[16];
Vector<uint16_t> clearsizes;
Vector<uint32_t> encryptedsizes;
nsTArray<uint16_t> clearsizes;
nsTArray<uint32_t> encryptedsizes;
bool isSync() const { return !(flags & 0x1010000); }
};
Vector<Sample> mCurrentSamples;
nsTArray<Sample> mCurrentSamples;
MPEG4Extractor::TrackExtends mTrackExtends;
// XXX hack -- demuxer expects a track's trun to be seen before saio or
@ -164,8 +163,8 @@ private:
off64_t mStart;
off64_t mSize;
};
Vector<AuxRange> mDeferredSaiz;
Vector<AuxRange> mDeferredSaio;
nsTArray<AuxRange> mDeferredSaiz;
nsTArray<AuxRange> mDeferredSaio;
MPEG4Source(const MPEG4Source &);
MPEG4Source &operator=(const MPEG4Source &);
@ -405,7 +404,7 @@ MPEG4Extractor::~MPEG4Extractor() {
}
mFirstSINF = NULL;
for (size_t i = 0; i < mPssh.size(); i++) {
for (size_t i = 0; i < mPssh.Length(); i++) {
delete [] mPssh[i].data;
}
}
@ -509,13 +508,13 @@ status_t MPEG4Extractor::readMetaData() {
// copy pssh data into file metadata
int psshsize = 0;
for (size_t i = 0; i < mPssh.size(); i++) {
for (size_t i = 0; i < mPssh.Length(); 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++) {
for (size_t i = 0; i < mPssh.Length(); i++) {
memcpy(ptr, mPssh[i].uuid, 20); // uuid + length
memcpy(ptr + 20, mPssh[i].data, mPssh[i].datalen);
ptr += (20 + mPssh[i].datalen);
@ -695,24 +694,24 @@ status_t MPEG4Extractor::parseDrmSINF(off64_t *offset, off64_t data_offset) {
}
struct PathAdder {
PathAdder(Vector<uint32_t> *path, uint32_t chunkType)
PathAdder(nsTArray<uint32_t> *path, uint32_t chunkType)
: mPath(path) {
mPath->push(chunkType);
mPath->AppendElement(chunkType);
}
~PathAdder() {
mPath->pop();
mPath->RemoveElementAt(mPath->Length() - 1);
}
private:
Vector<uint32_t> *mPath;
nsTArray<uint32_t> *mPath;
PathAdder(const PathAdder &);
PathAdder &operator=(const PathAdder &);
};
static bool underMetaDataPath(const Vector<uint32_t> &path) {
return path.size() >= 5
static bool underMetaDataPath(const nsTArray<uint32_t> &path) {
return path.Length() >= 5
&& path[0] == FOURCC('m', 'o', 'o', 'v')
&& path[1] == FOURCC('u', 'd', 't', 'a')
&& path[2] == FOURCC('m', 'e', 't', 'a')
@ -807,7 +806,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
if (chunk_type != FOURCC('c', 'p', 'r', 't')
&& chunk_type != FOURCC('c', 'o', 'v', 'r')
&& mPath.size() == 5 && underMetaDataPath(mPath)) {
&& mPath.Length() == 5 && underMetaDataPath(mPath)) {
off64_t stop_offset = *offset + chunk_size;
*offset = data_offset;
while (*offset < stop_offset) {
@ -1135,7 +1134,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_IO;
}
mPssh.push_back(pssh);
mPssh.AppendElement(pssh);
*offset += chunk_size;
break;
@ -1691,9 +1690,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
mLastTrack->meta->setData(
kKeyESDS, kTypeESDS, &buffer[4], chunk_data_size - 4);
if (mPath.size() >= 2
&& (mPath[mPath.size() - 2] == FOURCC('m', 'p', '4', 'a') ||
(mPath[mPath.size() - 2] == FOURCC('e', 'n', 'c', 'a')))) {
if (mPath.Length() >= 2
&& (mPath[mPath.Length() - 2] == FOURCC('m', 'p', '4', 'a') ||
(mPath[mPath.Length() - 2] == FOURCC('e', 'n', 'c', '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
@ -1811,7 +1810,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('n', 'a', 'm', 'e'):
case FOURCC('d', 'a', 't', 'a'):
{
if (mPath.size() == 6 && underMetaDataPath(mPath)) {
if (mPath.Length() == 6 && underMetaDataPath(mPath)) {
status_t err = parseMetaData(data_offset, chunk_data_size);
if (err != OK) {
@ -2175,7 +2174,7 @@ status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) {
SidxEntry se;
se.mSize = d1 & 0x7fffffff;
se.mDurationUs = 1000000LL * d2 / timeScale;
mSidxEntries.add(se);
mSidxEntries.AppendElement(se);
}
mSidxDuration = total_duration * 1000000 / timeScale;
@ -2688,7 +2687,7 @@ MPEG4Source::MPEG4Source(
const sp<DataSource> &dataSource,
int32_t timeScale,
const sp<SampleTable> &sampleTable,
Vector<SidxEntry> &sidx,
nsTArray<SidxEntry> &sidx,
MPEG4Extractor::TrackExtends &trackExtends)
: mFormat(format),
mDataSource(dataSource),
@ -2925,14 +2924,14 @@ status_t MPEG4Source::parseSampleAuxiliaryInformationSizes(off64_t offset, off64
ALOGV("parseSampleAuxiliaryInformationSizes");
// 14496-12 8.7.12
if (mCurrentSamples.isEmpty()) {
if (mCurrentSamples.IsEmpty()) {
// XXX hack -- we haven't seen trun yet; defer parsing this box until
// after trun.
ALOGW("deferring processing of saiz box");
AuxRange range;
range.mStart = offset;
range.mSize = size;
mDeferredSaiz.add(range);
mDeferredSaiz.AppendElement(range);
return OK;
}
@ -2999,14 +2998,14 @@ status_t MPEG4Source::parseSampleAuxiliaryInformationOffsets(off64_t offset, off
ALOGV("parseSampleAuxiliaryInformationOffsets");
// 14496-12 8.7.13
if (mCurrentSamples.isEmpty()) {
if (mCurrentSamples.IsEmpty()) {
// XXX hack -- we haven't seen trun yet; defer parsing this box until
// after trun.
ALOGW("deferring processing of saio box");
AuxRange range;
range.mStart = offset;
range.mSize = size;
mDeferredSaio.add(range);
mDeferredSaio.AppendElement(range);
return OK;
}
@ -3067,7 +3066,7 @@ status_t MPEG4Source::parseSampleAuxiliaryInformationOffsets(off64_t offset, off
// read CencSampleAuxiliaryDataFormats
for (size_t i = 0; i < mCurrentSampleInfoCount; i++) {
Sample *smpl = &mCurrentSamples.editItemAt(i);
Sample *smpl = &mCurrentSamples[i];
memset(smpl->iv, 0, 16);
if (mDataSource->readAt(drmoffset, smpl->iv, ivlength) != ivlength) {
@ -3097,12 +3096,12 @@ status_t MPEG4Source::parseSampleAuxiliaryInformationOffsets(off64_t offset, off
return ERROR_IO;
}
drmoffset += 4;
smpl->clearsizes.add(numclear);
smpl->encryptedsizes.add(numencrypted);
smpl->clearsizes.AppendElement(numclear);
smpl->encryptedsizes.AppendElement(numencrypted);
}
} else {
smpl->clearsizes.add(0);
smpl->encryptedsizes.add(smpl->size);
smpl->clearsizes.AppendElement(0);
smpl->encryptedsizes.AppendElement(smpl->size);
}
}
@ -3401,14 +3400,14 @@ status_t MPEG4Source::parseTrackFragmentRun(off64_t offset, off64_t size) {
tmp.size = sampleSize;
tmp.duration = sampleDuration;
tmp.ctsOffset = (int32_t)sampleCtsOffset;
mCurrentSamples.add(tmp);
mCurrentSamples.AppendElement(tmp);
dataOffset += sampleSize;
}
mTrackFragmentHeaderInfo.mDataOffset = dataOffset;
for (size_t i = 0; i < mDeferredSaio.size() && i < mDeferredSaiz.size(); i++) {
for (size_t i = 0; i < mDeferredSaio.Length() && i < mDeferredSaiz.Length(); i++) {
const auto& saio = mDeferredSaio[i];
const auto& saiz = mDeferredSaiz[i];
parseSampleAuxiliaryInformationSizes(saiz.mStart, saiz.mSize);
@ -3658,8 +3657,8 @@ status_t MPEG4Source::read(
}
if (mSampleTable->hasCencInfo()) {
Vector<uint16_t> clearSizes;
Vector<uint32_t> cipherSizes;
nsTArray<uint16_t> clearSizes;
nsTArray<uint32_t> cipherSizes;
uint8_t iv[16];
status_t err = mSampleTable->getSampleCencInfo(
mCurrentSampleIndex, clearSizes, cipherSizes, iv);
@ -3669,10 +3668,10 @@ status_t MPEG4Source::read(
}
const auto& meta = mBuffer->meta_data();
meta->setData(kKeyPlainSizes, 0, clearSizes.array(),
clearSizes.size() * sizeof(uint16_t));
meta->setData(kKeyEncryptedSizes, 0, cipherSizes.array(),
cipherSizes.size() * sizeof(uint32_t));
meta->setData(kKeyPlainSizes, 0, clearSizes.Elements(),
clearSizes.Length() * sizeof(uint16_t));
meta->setData(kKeyEncryptedSizes, 0, cipherSizes.Elements(),
cipherSizes.Length() * sizeof(uint32_t));
meta->setData(kKeyCryptoIV, 0, iv, sizeof(iv));
meta->setInt32(kKeyCryptoDefaultIVSize, mDefaultIVSize);
meta->setInt32(kKeyCryptoMode, mCryptoMode);
@ -3824,8 +3823,8 @@ status_t MPEG4Source::read(
}
if (mSampleTable->hasCencInfo()) {
Vector<uint16_t> clearSizes;
Vector<uint32_t> cipherSizes;
nsTArray<uint16_t> clearSizes;
nsTArray<uint32_t> cipherSizes;
uint8_t iv[16];
status_t err = mSampleTable->getSampleCencInfo(
mCurrentSampleIndex, clearSizes, cipherSizes, iv);
@ -3835,10 +3834,10 @@ status_t MPEG4Source::read(
}
const auto& meta = mBuffer->meta_data();
meta->setData(kKeyPlainSizes, 0, clearSizes.array(),
clearSizes.size() * sizeof(uint16_t));
meta->setData(kKeyEncryptedSizes, 0, cipherSizes.array(),
cipherSizes.size() * sizeof(uint32_t));
meta->setData(kKeyPlainSizes, 0, clearSizes.Elements(),
clearSizes.Length() * sizeof(uint16_t));
meta->setData(kKeyEncryptedSizes, 0, cipherSizes.Elements(),
cipherSizes.Length() * sizeof(uint32_t));
meta->setData(kKeyCryptoIV, 0, iv, sizeof(iv));
meta->setInt32(kKeyCryptoDefaultIVSize, mDefaultIVSize);
meta->setInt32(kKeyCryptoMode, mCryptoMode);
@ -3856,9 +3855,9 @@ status_t MPEG4Source::read(
status_t MPEG4Source::moveToNextFragment() {
off64_t nextMoof = mNextMoofOffset;
mCurrentSamples.clear();
mDeferredSaio.clear();
mDeferredSaiz.clear();
mCurrentSamples.Clear();
mDeferredSaio.Clear();
mDeferredSaiz.Clear();
mCurrentSampleIndex = 0;
uint32_t hdr[2];
do {
@ -3878,7 +3877,7 @@ status_t MPEG4Source::moveToNextFragment() {
if (ret != OK) {
return ret;
}
} while (mCurrentSamples.size() == 0);
} while (mCurrentSamples.Length() == 0);
return OK;
}
@ -3897,7 +3896,7 @@ status_t MPEG4Source::fragmentedRead(
ReadOptions::SeekMode mode;
if (options && options->getSeekTo(&seekTimeUs, &mode)) {
int numSidxEntries = mSegments.size();
int numSidxEntries = mSegments.Length();
if (numSidxEntries != 0) {
int64_t totalTime = 0;
off64_t totalOffset = mFirstMoofOffset;
@ -3919,9 +3918,9 @@ status_t MPEG4Source::fragmentedRead(
totalOffset += se->mSize;
}
mCurrentMoofOffset = totalOffset;
mCurrentSamples.clear();
mDeferredSaio.clear();
mDeferredSaiz.clear();
mCurrentSamples.Clear();
mDeferredSaio.Clear();
mDeferredSaiz.Clear();
mCurrentSampleIndex = 0;
mCurrentTime = totalTime * mTimescale / 1000000ll;
mNextMoofOffset = totalOffset;
@ -3936,7 +3935,7 @@ status_t MPEG4Source::fragmentedRead(
}
uint32_t time = mCurrentTime;
int i;
for (i = 0; i < mCurrentSamples.size() && time <= seekTime; i++) {
for (i = 0; i < mCurrentSamples.Length() && time <= seekTime; i++) {
const Sample *smpl = &mCurrentSamples[i];
if (smpl->isSync()) {
mCurrentSampleIndex = i;
@ -3944,7 +3943,7 @@ status_t MPEG4Source::fragmentedRead(
}
time += smpl->duration;
}
if (i != mCurrentSamples.size()) {
if (i != mCurrentSamples.Length()) {
break;
}
}
@ -3970,7 +3969,7 @@ status_t MPEG4Source::fragmentedRead(
if (mBuffer == NULL) {
newBuffer = true;
if (mCurrentSampleIndex >= mCurrentSamples.size()) {
if (mCurrentSampleIndex >= mCurrentSamples.Length()) {
status_t ret = moveToNextFragment();
if (ret != OK) {
return ret;
@ -3994,12 +3993,12 @@ status_t MPEG4Source::fragmentedRead(
const Sample *smpl = &mCurrentSamples[mCurrentSampleIndex];
const sp<MetaData> bufmeta = mBuffer->meta_data();
bufmeta->clear();
if (smpl->encryptedsizes.size()) {
if (smpl->encryptedsizes.Length()) {
// store clear/encrypted lengths in metadata
bufmeta->setData(kKeyPlainSizes, 0,
smpl->clearsizes.array(), smpl->clearsizes.size() * 2);
smpl->clearsizes.Elements(), smpl->clearsizes.Length() * 2);
bufmeta->setData(kKeyEncryptedSizes, 0,
smpl->encryptedsizes.array(), smpl->encryptedsizes.size() * 4);
smpl->encryptedsizes.Elements(), smpl->encryptedsizes.Length() * 4);
bufmeta->setData(kKeyCryptoIV, 0, smpl->iv, 16); // use 16 or the actual size?
bufmeta->setInt32(kKeyCryptoDefaultIVSize, mDefaultIVSize);
bufmeta->setInt32(kKeyCryptoMode, mCryptoMode);

49
media/libstagefright/frameworks/av/media/libstagefright/SampleTable.cpp
View File

@ -514,7 +514,7 @@ SampleTable::setSampleAuxiliaryInformationSizeParams(
return OK;
}
if (!mCencSizes.isEmpty() || mCencDefaultSize) {
if (!mCencSizes.IsEmpty() || mCencDefaultSize) {
ALOGE("duplicate cenc saiz box");
return ERROR_MALFORMED;
}
@ -536,9 +536,11 @@ SampleTable::setSampleAuxiliaryInformationSizeParams(
data_offset += 4;
if (!mCencDefaultSize) {
mCencSizes.insertAt(0, 0, mCencInfoCount);
if (!mCencSizes.InsertElementsAt(0, mCencInfoCount, mozilla::fallible)) {
return ERROR_IO;
}
if (mDataSource->readAt(
data_offset, mCencSizes.editArray(), mCencInfoCount)
data_offset, mCencSizes.Elements(), mCencInfoCount)
< mCencInfoCount) {
return ERROR_IO;
}
@ -568,7 +570,7 @@ SampleTable::setSampleAuxiliaryInformationOffsetParams(
return OK;
}
if (!mCencOffsets.isEmpty()) {
if (!mCencOffsets.IsEmpty()) {
ALOGE("duplicate cenc saio box");
return ERROR_MALFORMED;
}
@ -580,22 +582,29 @@ SampleTable::setSampleAuxiliaryInformationOffsetParams(
}
data_offset += 4;
if (mCencOffsets.setCapacity(cencOffsetCount) < 0) {
if (cencOffsetCount >= kMAX_ALLOCATION) {
return ERROR_MALFORMED;
}
if (!version) {
if (!mCencOffsets.SetCapacity(cencOffsetCount, mozilla::fallible)) {
return ERROR_MALFORMED;
}
for (uint32_t i = 0; i < cencOffsetCount; i++) {
uint32_t tmp;
if (!mDataSource->getUInt32(data_offset, &tmp)) {
ALOGE("error reading cenc aux info offsets");
return ERROR_IO;
}
mCencOffsets.push(tmp);
// FIXME: Make this infallible after bug 968520 is done.
MOZ_ALWAYS_TRUE(mCencOffsets.AppendElement(tmp, mozilla::fallible));
data_offset += 4;
}
} else {
if (!mCencOffsets.SetLength(cencOffsetCount, mozilla::fallible)) {
return ERROR_MALFORMED;
}
for (uint32_t i = 0; i < cencOffsetCount; i++) {
if (!mDataSource->getUInt64(data_offset, &mCencOffsets.editItemAt(i))) {
if (!mDataSource->getUInt64(data_offset, &mCencOffsets[i])) {
ALOGE("error reading cenc aux info offsets");
return ERROR_IO;
}
@ -610,15 +619,15 @@ SampleTable::setSampleAuxiliaryInformationOffsetParams(
status_t
SampleTable::parseSampleCencInfo() {
if ((!mCencDefaultSize && !mCencInfoCount) || mCencOffsets.isEmpty()) {
if ((!mCencDefaultSize && !mCencInfoCount) || mCencOffsets.IsEmpty()) {
// We don't have all the cenc information we need yet. Quietly fail and
// hope we get the data we need later in the track header.
ALOGV("Got half of cenc saio/saiz pair. Deferring parse until we get the other half.");
return OK;
}
if (!mCencSizes.isEmpty() && mCencOffsets.size() > 1 &&
mCencSizes.size() != mCencOffsets.size()) {
if (!mCencSizes.IsEmpty() && mCencOffsets.Length() > 1 &&
mCencSizes.IsEmpty() != mCencOffsets.Length()) {
return ERROR_MALFORMED;
}
@ -635,7 +644,7 @@ SampleTable::parseSampleCencInfo() {
uint64_t nextOffset = mCencOffsets[0];
for (uint32_t i = 0; i < mCencInfoCount; i++) {
uint8_t size = mCencDefaultSize ? mCencDefaultSize : mCencSizes[i];
uint64_t offset = mCencOffsets.size() == 1 ? nextOffset : mCencOffsets[i];
uint64_t offset = mCencOffsets.Length() == 1 ? nextOffset : mCencOffsets[i];
nextOffset = offset + size;
auto& info = mCencInfo[i];
@ -1096,9 +1105,9 @@ uint32_t SampleTable::getCompositionTimeOffset(uint32_t sampleIndex) {
status_t
SampleTable::getSampleCencInfo(
uint32_t sample_index, Vector<uint16_t>& clear_sizes,
Vector<uint32_t>& cipher_sizes, uint8_t iv[]) {
CHECK(clear_sizes.isEmpty() && cipher_sizes.isEmpty());
uint32_t sample_index, nsTArray<uint16_t>& clear_sizes,
nsTArray<uint32_t>& cipher_sizes, uint8_t iv[]) {
CHECK(clear_sizes.IsEmpty() && cipher_sizes.IsEmpty());
if (sample_index >= mCencInfoCount) {
ALOGE("cenc info requested for out of range sample index");
@ -1106,16 +1115,12 @@ SampleTable::getSampleCencInfo(
}
auto& info = mCencInfo[sample_index];
if (clear_sizes.setCapacity(info.mSubsampleCount) < 0) {
return ERROR_MALFORMED;
}
if (cipher_sizes.setCapacity(info.mSubsampleCount) < 0) {
return ERROR_MALFORMED;
}
clear_sizes.SetCapacity(info.mSubsampleCount);
cipher_sizes.SetCapacity(info.mSubsampleCount);
for (uint32_t i = 0; i < info.mSubsampleCount; i++) {
clear_sizes.push(info.mSubsamples[i].mClearBytes);
cipher_sizes.push(info.mSubsamples[i].mCipherBytes);
clear_sizes.AppendElement(info.mSubsamples[i].mClearBytes);
cipher_sizes.AppendElement(info.mSubsamples[i].mCipherBytes);
}
memcpy(iv, info.mIV, IV_BYTES);

8
media/libstagefright/frameworks/av/media/libstagefright/include/MPEG4Extractor.h
View File

@ -24,8 +24,8 @@
#include <media/stagefright/MediaExtractor.h>
#include <media/stagefright/Utils.h>
#include <utils/List.h>
#include <utils/Vector.h>
#include <utils/String8.h>
#include "nsTArray.h"
namespace stagefright {
@ -97,10 +97,10 @@ private:
bool skipTrack;
};
Vector<SidxEntry> mSidxEntries;
nsTArray<SidxEntry> mSidxEntries;
uint64_t mSidxDuration;
Vector<PsshInfo> mPssh;
nsTArray<PsshInfo> mPssh;
sp<DataSource> mDataSource;
status_t mInitCheck;
@ -111,7 +111,7 @@ private:
sp<MetaData> mFileMetaData;
Vector<uint32_t> mPath;
nsTArray<uint32_t> mPath;
String8 mLastCommentMean;
String8 mLastCommentName;
String8 mLastCommentData;

9
media/libstagefright/frameworks/av/media/libstagefright/include/SampleTable.h
View File

@ -24,7 +24,6 @@
#include <media/stagefright/MediaErrors.h>
#include <utils/RefBase.h>
#include <utils/threads.h>
#include <utils/Vector.h>
namespace stagefright {
@ -96,8 +95,8 @@ public:
bool hasCencInfo() const { return !!mCencInfo; }
status_t getSampleCencInfo(uint32_t aSampleIndex,
Vector<uint16_t>& aClearSizes,
Vector<uint32_t>& aCipherSizes,
nsTArray<uint16_t>& aClearSizes,
nsTArray<uint32_t>& aCipherSizes,
uint8_t aIV[]);
protected:
@ -166,8 +165,8 @@ private:
uint32_t mCencInfoCount;
uint8_t mCencDefaultSize;
Vector<uint8_t> mCencSizes;
Vector<uint64_t> mCencOffsets;
FallibleTArray<uint8_t> mCencSizes;
FallibleTArray<uint64_t> mCencOffsets;
friend struct SampleIterator;