status_t MyVorbisExtractor::seekToTime(int64_t timeUs) {
if (mTableOfContents.isEmpty()) {
// Perform approximate seeking based on avg. bitrate.
off64_t pos = timeUs * approxBitrate() / 8000000ll;
LOGV("seeking to offset %lld", pos);
return seekToOffset(pos);
}
size_t left = 0;
size_t right = mTableOfContents.size();
while (left < right) {
size_t center = left / 2 + right / 2 + (left & right & 1);
const TOCEntry &entry = mTableOfContents.itemAt(center);
if (timeUs < entry.mTimeUs) {
right = center;
} else if (timeUs > entry.mTimeUs) {
left = center + 1;
} else {
left = right = center;
break;
}
}
const TOCEntry &entry = mTableOfContents.itemAt(left);
LOGV("seeking to entry %d / %d at offset %lld",
left, mTableOfContents.size(), entry.mPageOffset);
return seekToOffset(entry.mPageOffset);
}
status_t MyVorbisExtractor::verifyHeader(
MediaBuffer *buffer, uint8_t type) {
const uint8_t *data =
(const uint8_t *)buffer->data() + buffer->range_offset();
size_t size = buffer->range_length();
if (size < 7 || data[0] != type || memcmp(&data[1], "vorbis", 6)) {
return ERROR_MALFORMED;
}
ogg_buffer buf;
buf.data = (uint8_t *)data;
buf.size = size;
buf.refcount = 1;
buf.ptr.owner = NULL;
ogg_reference ref;
ref.buffer = &buf;
ref.begin = 0;
ref.length = size;
ref.next = NULL;
oggpack_buffer bits;
oggpack_readinit(&bits, &ref);
CHECK_EQ(oggpack_read(&bits, 8), type);
for (size_t i = 0; i < 6; ++i) {
oggpack_read(&bits, 8); // skip 'vorbis'
}
switch (type) {
case 1:
{
CHECK_EQ(0, _vorbis_unpack_info(&mVi, &bits));
mMeta->setData(kKeyVorbisInfo, 0, data, size);
mMeta->setInt32(kKeySampleRate, mVi.rate);
mMeta->setInt32(kKeyChannelCount, mVi.channels);
LOGV("lower-bitrate = %ld", mVi.bitrate_lower);
LOGV("upper-bitrate = %ld", mVi.bitrate_upper);
LOGV("nominal-bitrate = %ld", mVi.bitrate_nominal);
LOGV("window-bitrate = %ld", mVi.bitrate_window);
off64_t size;
if (mSource->getSize(&size) == OK) {
uint64_t bps = approxBitrate();
if(0 != bps && bps < 10000000)
{
mMeta->setInt64(kKeyDuration, size * 8000000ll / bps);
} else
{
uint64_t lastGranule, tDuration;
lastGranule= findLastGranule();
tDuration = lastGranule*1000000/mVi.rate;
mMeta->setInt64(kKeyDuration, tDuration);
bps = size * 8000000ll / tDuration;
mMeta->setInt64(kKeyBitRate, size * 8000000ll / tDuration);
mVi.bitrate_nominal = bps;
}
}
break;
}
case 3:
{
if (0 != _vorbis_unpack_comment(&mVc, &bits)) {
return ERROR_MALFORMED;
}
parseFileMetaData();
break;
}
case 5:
{
if (0 != _vorbis_unpack_books(&mVi, &bits)) {
return ERROR_MALFORMED;
}
mMeta->setData(kKeyVorbisBooks, 0, data, size);
break;
}
}
return OK;
}
status_t MyVorbisExtractor::seekToTime(int64_t timeUs) {
#ifdef MTK_AOSP_ENHANCEMENT
if(timeUs == 0)
return seekToOffset(0);
if (isCachingDataSource())
{
off64_t pos = timeUs * approxBitrate() / 8000000ll;
SXLOGV("seeking to offset %lld", pos);
return seekToOffset(pos);
}
if (mTableOfContents.isEmpty() || (mTocDone == false)) {
// Perform seekto accurate page.
uint64_t ts1,ts2;
if(findGranulePositionofPage(mFirstDataOffset,&ts1) != OK)
return seekToOffset(0);
if(findGranulePositionofPage(mFileSize,&ts2) != OK)
return seekToOffset(0);
SXLOGD("bitrate seek--pos:%lld,ts1:%lld,ts2:%lld",timeUs * mVi.rate /1000000,ts1,ts2);
off64_t pos = findAccuratePageOffset((uint64_t)(timeUs * mVi.rate /1000000),mFirstDataOffset,mFileSize);
#else
if (mTableOfContents.isEmpty()) {
// Perform approximate seeking based on avg. bitrate.
off64_t pos = timeUs * approxBitrate() / 8000000ll;
#endif
ALOGV("seeking to offset %lld", pos);
return seekToOffset(pos);
}
size_t left = 0;
size_t right_plus_one = mTableOfContents.size();
while (left < right_plus_one) {
size_t center = left + (right_plus_one - left) / 2;
const TOCEntry &entry = mTableOfContents.itemAt(center);
if (timeUs < entry.mTimeUs) {
right_plus_one = center;
} else if (timeUs > entry.mTimeUs) {
left = center + 1;
} else {
left = center;
break;
}
}
if (left == mTableOfContents.size()) {
--left;
}
#ifndef MTK_AOSP_ENHANCEMENT
const TOCEntry &entry = mTableOfContents.itemAt(left);
ALOGV("seeking to entry %zu / %zu at offset %lld",
left, mTableOfContents.size(), entry.mPageOffset);
return seekToOffset(entry.mPageOffset);
#else
if(mTableOfContents.itemAt(mTableOfContents.size()-1).mTimeUs <= timeUs)
return seekToOffset(mTableOfContents.itemAt(mTableOfContents.size()-1).mPageOffset);
off64_t os = 0,oe = 0;
for(size_t i = left ; i < mTableOfContents.size() ;i ++)
{
if(mTableOfContents.itemAt(i).mTimeUs > timeUs)
{
oe = mTableOfContents.itemAt(i).mPageOffset;
break;
}
else if(mTableOfContents.itemAt(i).mTimeUs == timeUs)
return seekToOffset(mTableOfContents.itemAt(left).mPageOffset);
}
for(size_t i = left ; (i >= 0) && (i < mTableOfContents.size()) ;i --)
{
if(mTableOfContents.itemAt(i).mTimeUs < timeUs)
{
os = mTableOfContents.itemAt(i).mPageOffset;
break;
}
else if(mTableOfContents.itemAt(i).mTimeUs == timeUs)
return seekToOffset(mTableOfContents.itemAt(left).mPageOffset);
}
/*for(size_t i = 0 ; i< mTableOfContents.size() ;i ++)
{
uint64_t ts;
findGranulePositionofPage(mTableOfContents.itemAt(i).mPageOffset,&ts);
SXLOGD("mTableOfContents.itemAt(%d)--mPageOffset:%lld,mTimeUs:%lld,ts:%lld",i,mTableOfContents.itemAt(i).mPageOffset,mTableOfContents.itemAt(i).mTimeUs,ts);
}*/
uint64_t ts1,ts2,ts;
findGranulePositionofPage(os,&ts1);
findGranulePositionofPage(oe,&ts2);
off64_t pos = findAccuratePageOffset((uint64_t)(timeUs * mVi.rate /1000000),os,oe);
findGranulePositionofPage(pos,&ts);
SXLOGD("seektable seek--pos:%lld,ts1:%lld,ts2:%lld,pos:%lld,ts:%lld",timeUs * mVi.rate /1000000,ts1,ts2,pos,ts);
return seekToOffset(pos);
#endif
}
#ifdef MTK_AOSP_ENHANCEMENT
status_t MyVorbisExtractor::findNextPage_l(
off64_t startOffset, off64_t *pageOffset) {
*pageOffset = startOffset;
char signature[2048];
for (;;) {
ssize_t n = mSource->readAt(*pageOffset, &signature, 2000);
if (n < 4) {
*pageOffset = 0;
return (n < 0) ? n : (status_t)ERROR_END_OF_STREAM;
}
int i = 0;
int step = n-4;
while(i<=step)
{
if (!memcmp(&signature[i], "OggS", 4) && ((*pageOffset + i) > startOffset)) {
if ((*pageOffset + i) > startOffset) {
SXLOGV("skipped %lld bytes of junk to reach next frame",
(*pageOffset + i) - startOffset);
}
*pageOffset += i;
return OK;
}
i++;
}
*pageOffset += n;
}
}
void MyVorbisExtractor::buildTableOfContents() {
off64_t offset = mFirstDataOffset;
Page page;
ssize_t pageSize;
#ifndef MTK_AOSP_ENHANCEMENT
while ((pageSize = readPage(offset, &page)) > 0) {
#else
struct timeval tb,te;
gettimeofday(&tb,NULL);
while (mTocStarted && ((pageSize = readPage(offset, &page)) > 0)) {
if(page.mGranulePosition < 0xFFFFFFFFFFFF)
{
#endif
mTableOfContents.push();
TOCEntry &entry =
mTableOfContents.editItemAt(mTableOfContents.size() - 1);
entry.mPageOffset = offset;
entry.mTimeUs = page.mGranulePosition * 1000000ll / mVi.rate;
#ifdef MTK_AOSP_ENHANCEMENT
//sleep 100ms for consumes over 2s
gettimeofday(&te,NULL);
if((te.tv_sec - tb.tv_sec) > 2)
{
gettimeofday(&tb,NULL);
usleep(100000);
}
}
#endif
offset += (size_t)pageSize;
}
// Limit the maximum amount of RAM we spend on the table of contents,
// if necessary thin out the table evenly to trim it down to maximum
// size.
static const size_t kMaxTOCSize = 8192;
static const size_t kMaxNumTOCEntries = kMaxTOCSize / sizeof(TOCEntry);
size_t numerator = mTableOfContents.size();
if (numerator > kMaxNumTOCEntries) {
size_t denom = numerator - kMaxNumTOCEntries;
size_t accum = 0;
for (ssize_t i = mTableOfContents.size() - 1; i >= 0; --i) {
accum += denom;
if (accum >= numerator) {
mTableOfContents.removeAt(i);
accum -= numerator;
}
}
}
#ifdef MTK_AOSP_ENHANCEMENT
mTocDone = true;
#endif
}
status_t MyVorbisExtractor::verifyHeader(
MediaBuffer *buffer, uint8_t type) {
const uint8_t *data =
(const uint8_t *)buffer->data() + buffer->range_offset();
size_t size = buffer->range_length();
if (size < 7 || data[0] != type || memcmp(&data[1], "vorbis", 6)) {
return ERROR_MALFORMED;
}
ogg_buffer buf;
buf.data = (uint8_t *)data;
buf.size = size;
buf.refcount = 1;
buf.ptr.owner = NULL;
ogg_reference ref;
ref.buffer = &buf;
ref.begin = 0;
ref.length = size;
ref.next = NULL;
oggpack_buffer bits;
oggpack_readinit(&bits, &ref);
CHECK_EQ(oggpack_read(&bits, 8), type);
for (size_t i = 0; i < 6; ++i) {
oggpack_read(&bits, 8); // skip 'vorbis'
}
switch (type) {
case 1:
{
#ifndef MTK_AOSP_ENHANCEMENT
CHECK_EQ(0, _vorbis_unpack_info(&mVi, &bits));
#else
_vorbis_unpack_info(&mVi, &bits);//skip the CHECK
#endif
mMeta->setData(kKeyVorbisInfo, 0, data, size);
mMeta->setInt32(kKeySampleRate, mVi.rate);
mMeta->setInt32(kKeyChannelCount, mVi.channels);
#ifdef MTK_AOSP_ENHANCEMENT
if(mVi.channels > 2)
{
#ifndef MTK_SWIP_VORBIS
SXLOGE("Tremolo does not support multi channel");
return ERROR_UNSUPPORTED;
#endif
}
#endif
ALOGV("lower-bitrate = %ld", mVi.bitrate_lower);
ALOGV("upper-bitrate = %ld", mVi.bitrate_upper);
ALOGV("nominal-bitrate = %ld", mVi.bitrate_nominal);
ALOGV("window-bitrate = %ld", mVi.bitrate_window);
off64_t size;
if (mSource->getSize(&size) == OK) {
uint64_t bps = approxBitrate();
if (bps != 0) {
mMeta->setInt64(kKeyDuration, size * 8000000ll / bps);
}
}
break;
}
case 3:
{
if (0 != _vorbis_unpack_comment(&mVc, &bits)) {
return ERROR_MALFORMED;
}
parseFileMetaData();
break;
}
case 5:
{
if (0 != _vorbis_unpack_books(&mVi, &bits)) {
return ERROR_MALFORMED;
}
mMeta->setData(kKeyVorbisBooks, 0, data, size);
break;
}
}
return OK;
}
uint64_t MyVorbisExtractor::approxBitrate() {
if (mVi.bitrate_nominal != 0) {
return mVi.bitrate_nominal;
}
return (mVi.bitrate_lower + mVi.bitrate_upper) / 2;
}
void MyVorbisExtractor::parseFileMetaData() {
mFileMeta = new MetaData;
#ifdef MTK_AOSP_ENHANCEMENT
if(mFileMeta.get() == NULL) return;
#endif
mFileMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_OGG);
for (int i = 0; i < mVc.comments; ++i) {
const char *comment = mVc.user_comments[i];
size_t commentLength = mVc.comment_lengths[i];
parseVorbisComment(mFileMeta, comment, commentLength);
//ALOGI("comment #%d: '%s'", i + 1, mVc.user_comments[i]);
}
}