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Diffstat (limited to 'media/libstagefright/httplive/PlaylistFetcher.cpp')
-rw-r--r--media/libstagefright/httplive/PlaylistFetcher.cpp379
1 files changed, 273 insertions, 106 deletions
diff --git a/media/libstagefright/httplive/PlaylistFetcher.cpp b/media/libstagefright/httplive/PlaylistFetcher.cpp
index 513f114..82a4c39 100644
--- a/media/libstagefright/httplive/PlaylistFetcher.cpp
+++ b/media/libstagefright/httplive/PlaylistFetcher.cpp
@@ -49,7 +49,7 @@ namespace android {
// static
const int64_t PlaylistFetcher::kMinBufferedDurationUs = 10000000ll;
const int64_t PlaylistFetcher::kMaxMonitorDelayUs = 3000000ll;
-const int32_t PlaylistFetcher::kDownloadBlockSize = 192;
+const int32_t PlaylistFetcher::kDownloadBlockSize = 2048;
const int32_t PlaylistFetcher::kNumSkipFrames = 10;
PlaylistFetcher::PlaylistFetcher(
@@ -62,18 +62,21 @@ PlaylistFetcher::PlaylistFetcher(
mURI(uri),
mStreamTypeMask(0),
mStartTimeUs(-1ll),
- mMinStartTimeUs(0ll),
- mStopParams(NULL),
+ mSegmentStartTimeUs(-1ll),
+ mDiscontinuitySeq(-1ll),
+ mStartTimeUsRelative(false),
mLastPlaylistFetchTimeUs(-1ll),
mSeqNumber(-1),
mNumRetries(0),
mStartup(true),
+ mAdaptive(false),
mPrepared(false),
mNextPTSTimeUs(-1ll),
mMonitorQueueGeneration(0),
mRefreshState(INITIAL_MINIMUM_RELOAD_DELAY),
mFirstPTSValid(false),
- mAbsoluteTimeAnchorUs(0ll) {
+ mAbsoluteTimeAnchorUs(0ll),
+ mVideoBuffer(new AnotherPacketSource(NULL)) {
memset(mPlaylistHash, 0, sizeof(mPlaylistHash));
mStartTimeUsNotify->setInt32("what", kWhatStartedAt);
mStartTimeUsNotify->setInt32("streamMask", 0);
@@ -317,7 +320,7 @@ void PlaylistFetcher::postMonitorQueue(int64_t delayUs, int64_t minDelayUs) {
maxDelayUs = minDelayUs;
}
if (delayUs > maxDelayUs) {
- ALOGV("Need to refresh playlist in %lld", maxDelayUs);
+ ALOGV("Need to refresh playlist in %" PRId64 , maxDelayUs);
delayUs = maxDelayUs;
}
sp<AMessage> msg = new AMessage(kWhatMonitorQueue, id());
@@ -334,8 +337,9 @@ void PlaylistFetcher::startAsync(
const sp<AnotherPacketSource> &videoSource,
const sp<AnotherPacketSource> &subtitleSource,
int64_t startTimeUs,
- int64_t minStartTimeUs,
- int32_t startSeqNumberHint) {
+ int64_t segmentStartTimeUs,
+ int32_t startDiscontinuitySeq,
+ bool adaptive) {
sp<AMessage> msg = new AMessage(kWhatStart, id());
uint32_t streamTypeMask = 0ul;
@@ -357,8 +361,9 @@ void PlaylistFetcher::startAsync(
msg->setInt32("streamTypeMask", streamTypeMask);
msg->setInt64("startTimeUs", startTimeUs);
- msg->setInt64("minStartTimeUs", minStartTimeUs);
- msg->setInt32("startSeqNumberHint", startSeqNumberHint);
+ msg->setInt64("segmentStartTimeUs", segmentStartTimeUs);
+ msg->setInt32("startDiscontinuitySeq", startDiscontinuitySeq);
+ msg->setInt32("adaptive", adaptive);
msg->post();
}
@@ -366,9 +371,9 @@ void PlaylistFetcher::pauseAsync() {
(new AMessage(kWhatPause, id()))->post();
}
-void PlaylistFetcher::stopAsync(bool selfTriggered) {
+void PlaylistFetcher::stopAsync(bool clear) {
sp<AMessage> msg = new AMessage(kWhatStop, id());
- msg->setInt32("selfTriggered", selfTriggered);
+ msg->setInt32("clear", clear);
msg->post();
}
@@ -448,10 +453,13 @@ status_t PlaylistFetcher::onStart(const sp<AMessage> &msg) {
CHECK(msg->findInt32("streamTypeMask", (int32_t *)&streamTypeMask));
int64_t startTimeUs;
- int32_t startSeqNumberHint;
+ int64_t segmentStartTimeUs;
+ int32_t startDiscontinuitySeq;
+ int32_t adaptive;
CHECK(msg->findInt64("startTimeUs", &startTimeUs));
- CHECK(msg->findInt64("minStartTimeUs", (int64_t *) &mMinStartTimeUs));
- CHECK(msg->findInt32("startSeqNumberHint", &startSeqNumberHint));
+ CHECK(msg->findInt64("segmentStartTimeUs", &segmentStartTimeUs));
+ CHECK(msg->findInt32("startDiscontinuitySeq", &startDiscontinuitySeq));
+ CHECK(msg->findInt32("adaptive", &adaptive));
if (streamTypeMask & LiveSession::STREAMTYPE_AUDIO) {
void *ptr;
@@ -481,16 +489,16 @@ status_t PlaylistFetcher::onStart(const sp<AMessage> &msg) {
}
mStreamTypeMask = streamTypeMask;
- mStartTimeUs = startTimeUs;
- if (mStartTimeUs >= 0ll) {
+ mSegmentStartTimeUs = segmentStartTimeUs;
+ mDiscontinuitySeq = startDiscontinuitySeq;
+
+ if (startTimeUs >= 0) {
+ mStartTimeUs = startTimeUs;
mSeqNumber = -1;
mStartup = true;
mPrepared = false;
- }
-
- if (startSeqNumberHint >= 0) {
- mSeqNumber = startSeqNumberHint;
+ mAdaptive = adaptive;
}
postMonitorQueue();
@@ -505,11 +513,9 @@ void PlaylistFetcher::onPause() {
void PlaylistFetcher::onStop(const sp<AMessage> &msg) {
cancelMonitorQueue();
- int32_t selfTriggered;
- CHECK(msg->findInt32("selfTriggered", &selfTriggered));
- if (!selfTriggered) {
- // Self triggered stops only happen during switching, in which case we do not want
- // to clear the discontinuities queued at the end of packet sources.
+ int32_t clear;
+ CHECK(msg->findInt32("clear", &clear));
+ if (clear) {
for (size_t i = 0; i < mPacketSources.size(); i++) {
sp<AnotherPacketSource> packetSource = mPacketSources.valueAt(i);
packetSource->clear();
@@ -551,15 +557,16 @@ status_t PlaylistFetcher::onResumeUntil(const sp<AMessage> &msg) {
}
// Don't resume if we would stop within a resume threshold.
+ int32_t discontinuitySeq;
int64_t latestTimeUs = 0, stopTimeUs = 0;
- sp<AMessage> latestMeta = packetSource->getLatestMeta();
+ sp<AMessage> latestMeta = packetSource->getLatestDequeuedMeta();
if (latestMeta != NULL
- && (latestMeta->findInt64("timeUs", &latestTimeUs)
- && params->findInt64(stopKey, &stopTimeUs))) {
- int64_t diffUs = stopTimeUs - latestTimeUs;
- if (diffUs < resumeThreshold(latestMeta)) {
- stop = true;
- }
+ && latestMeta->findInt32("discontinuitySeq", &discontinuitySeq)
+ && discontinuitySeq == mDiscontinuitySeq
+ && latestMeta->findInt64("timeUs", &latestTimeUs)
+ && params->findInt64(stopKey, &stopTimeUs)
+ && stopTimeUs - latestTimeUs < resumeThreshold(latestMeta)) {
+ stop = true;
}
}
@@ -567,7 +574,7 @@ status_t PlaylistFetcher::onResumeUntil(const sp<AMessage> &msg) {
for (size_t i = 0; i < mPacketSources.size(); i++) {
mPacketSources.valueAt(i)->queueAccessUnit(mSession->createFormatChangeBuffer());
}
- stopAsync(/* selfTriggered = */ true);
+ stopAsync(/* clear = */ false);
return OK;
}
@@ -587,7 +594,10 @@ void PlaylistFetcher::notifyError(status_t err) {
void PlaylistFetcher::queueDiscontinuity(
ATSParser::DiscontinuityType type, const sp<AMessage> &extra) {
for (size_t i = 0; i < mPacketSources.size(); ++i) {
- mPacketSources.valueAt(i)->queueDiscontinuity(type, extra);
+ // do not discard buffer upon #EXT-X-DISCONTINUITY tag
+ // (seek will discard buffer by abandoning old fetchers)
+ mPacketSources.valueAt(i)->queueDiscontinuity(
+ type, extra, false /* discard */);
}
}
@@ -628,7 +638,7 @@ void PlaylistFetcher::onMonitorQueue() {
int64_t bufferedStreamDurationUs =
mPacketSources.valueAt(i)->getBufferedDurationUs(&finalResult);
- ALOGV("buffered %lld for stream %d",
+ ALOGV("buffered %" PRId64 " for stream %d",
bufferedStreamDurationUs, mPacketSources.keyAt(i));
if (bufferedStreamDurationUs > bufferedDurationUs) {
bufferedDurationUs = bufferedStreamDurationUs;
@@ -641,7 +651,7 @@ void PlaylistFetcher::onMonitorQueue() {
if (!mPrepared && bufferedDurationUs > targetDurationUs && downloadMore) {
mPrepared = true;
- ALOGV("prepared, buffered=%lld > %lld",
+ ALOGV("prepared, buffered=%" PRId64 " > %" PRId64 "",
bufferedDurationUs, targetDurationUs);
sp<AMessage> msg = mNotify->dup();
msg->setInt32("what", kWhatTemporarilyDoneFetching);
@@ -649,7 +659,7 @@ void PlaylistFetcher::onMonitorQueue() {
}
if (finalResult == OK && downloadMore) {
- ALOGV("monitoring, buffered=%lld < %lld",
+ ALOGV("monitoring, buffered=%" PRId64 " < %" PRId64 "",
bufferedDurationUs, durationToBufferUs);
// delay the next download slightly; hopefully this gives other concurrent fetchers
// a better chance to run.
@@ -665,7 +675,7 @@ void PlaylistFetcher::onMonitorQueue() {
msg->post();
int64_t delayUs = mPrepared ? kMaxMonitorDelayUs : targetDurationUs / 2;
- ALOGV("pausing for %lld, buffered=%lld > %lld",
+ ALOGV("pausing for %" PRId64 ", buffered=%" PRId64 " > %" PRId64 "",
delayUs, bufferedDurationUs, durationToBufferUs);
// :TRICKY: need to enforce minimum delay because the delay to
// refresh the playlist will become 0
@@ -722,8 +732,7 @@ void PlaylistFetcher::onDownloadNext() {
firstSeqNumberInPlaylist = 0;
}
- bool seekDiscontinuity = false;
- bool explicitDiscontinuity = false;
+ bool discontinuity = false;
const int32_t lastSeqNumberInPlaylist =
firstSeqNumberInPlaylist + (int32_t)mPlaylist->size() - 1;
@@ -734,26 +743,50 @@ void PlaylistFetcher::onDownloadNext() {
mSeqNumber = lastSeqNumberInPlaylist;
}
+ if (mDiscontinuitySeq < 0) {
+ mDiscontinuitySeq = mPlaylist->getDiscontinuitySeq();
+ }
+
if (mSeqNumber < 0) {
CHECK_GE(mStartTimeUs, 0ll);
- if (mPlaylist->isComplete() || mPlaylist->isEvent()) {
- mSeqNumber = getSeqNumberForTime(mStartTimeUs);
- ALOGV("Initial sequence number for time %lld is %ld from (%ld .. %ld)",
+ if (mSegmentStartTimeUs < 0) {
+ if (!mPlaylist->isComplete() && !mPlaylist->isEvent()) {
+ // If this is a live session, start 3 segments from the end on connect
+ mSeqNumber = lastSeqNumberInPlaylist - 3;
+ if (mSeqNumber < firstSeqNumberInPlaylist) {
+ mSeqNumber = firstSeqNumberInPlaylist;
+ }
+ } else {
+ mSeqNumber = getSeqNumberForTime(mStartTimeUs);
+ mStartTimeUs -= getSegmentStartTimeUs(mSeqNumber);
+ }
+ mStartTimeUsRelative = true;
+ ALOGV("Initial sequence number for time %" PRId64 " is %d from (%d .. %d)",
mStartTimeUs, mSeqNumber, firstSeqNumberInPlaylist,
lastSeqNumberInPlaylist);
} else {
- // If this is a live session, start 3 segments from the end.
- mSeqNumber = lastSeqNumberInPlaylist - 3;
+ mSeqNumber = getSeqNumberForTime(mSegmentStartTimeUs);
+ if (mAdaptive) {
+ // avoid double fetch/decode
+ mSeqNumber += 1;
+ }
+ ssize_t minSeq = getSeqNumberForDiscontinuity(mDiscontinuitySeq);
+ if (mSeqNumber < minSeq) {
+ mSeqNumber = minSeq;
+ }
+
if (mSeqNumber < firstSeqNumberInPlaylist) {
mSeqNumber = firstSeqNumberInPlaylist;
}
- ALOGV("Initial sequence number for live event %ld from (%ld .. %ld)",
+
+ if (mSeqNumber > lastSeqNumberInPlaylist) {
+ mSeqNumber = lastSeqNumberInPlaylist;
+ }
+ ALOGV("Initial sequence number for live event %d from (%d .. %d)",
mSeqNumber, firstSeqNumberInPlaylist,
lastSeqNumberInPlaylist);
}
-
- mStartTimeUs = -1ll;
}
if (mSeqNumber < firstSeqNumberInPlaylist
@@ -772,7 +805,8 @@ void PlaylistFetcher::onDownloadNext() {
if (delayUs > kMaxMonitorDelayUs) {
delayUs = kMaxMonitorDelayUs;
}
- ALOGV("sequence number high: %ld from (%ld .. %ld), monitor in %lld (retry=%d)",
+ ALOGV("sequence number high: %d from (%d .. %d), "
+ "monitor in %" PRId64 " (retry=%d)",
mSeqNumber, firstSeqNumberInPlaylist,
lastSeqNumberInPlaylist, delayUs, mNumRetries);
postMonitorQueue(delayUs);
@@ -790,7 +824,7 @@ void PlaylistFetcher::onDownloadNext() {
if (mSeqNumber < firstSeqNumberInPlaylist) {
mSeqNumber = firstSeqNumberInPlaylist;
}
- explicitDiscontinuity = true;
+ discontinuity = true;
// fall through
} else {
@@ -815,7 +849,8 @@ void PlaylistFetcher::onDownloadNext() {
int32_t val;
if (itemMeta->findInt32("discontinuity", &val) && val != 0) {
- explicitDiscontinuity = true;
+ mDiscontinuitySeq++;
+ discontinuity = true;
}
int64_t range_offset, range_length;
@@ -846,6 +881,7 @@ void PlaylistFetcher::onDownloadNext() {
}
// block-wise download
+ bool startup = mStartup;
ssize_t bytesRead;
do {
bytesRead = mSession->fetchFile(
@@ -875,7 +911,7 @@ void PlaylistFetcher::onDownloadNext() {
return;
}
- if (mStartup || seekDiscontinuity || explicitDiscontinuity) {
+ if (startup || discontinuity) {
// Signal discontinuity.
if (mPlaylist->isComplete() || mPlaylist->isEvent()) {
@@ -885,16 +921,17 @@ void PlaylistFetcher::onDownloadNext() {
mNextPTSTimeUs = getSegmentStartTimeUs(mSeqNumber);
}
- if (seekDiscontinuity || explicitDiscontinuity) {
- ALOGI("queueing discontinuity (seek=%d, explicit=%d)",
- seekDiscontinuity, explicitDiscontinuity);
+ if (discontinuity) {
+ ALOGI("queueing discontinuity (explicit=%d)", discontinuity);
queueDiscontinuity(
- explicitDiscontinuity
- ? ATSParser::DISCONTINUITY_FORMATCHANGE
- : ATSParser::DISCONTINUITY_SEEK,
+ ATSParser::DISCONTINUITY_FORMATCHANGE,
NULL /* extra */);
+
+ discontinuity = false;
}
+
+ startup = false;
}
err = OK;
@@ -914,23 +951,19 @@ void PlaylistFetcher::onDownloadNext() {
}
if (err == -EAGAIN) {
- // bad starting sequence number hint
+ // starting sequence number too low
+ mTSParser.clear();
postMonitorQueue();
return;
- }
-
- if (err == ERROR_OUT_OF_RANGE) {
+ } else if (err == ERROR_OUT_OF_RANGE) {
// reached stopping point
- stopAsync(/* selfTriggered = */ true);
+ stopAsync(/* clear = */ false);
return;
- }
-
- if (err != OK) {
+ } else if (err != OK) {
notifyError(err);
return;
}
- mStartup = false;
} while (bytesRead != 0);
if (bufferStartsWithTsSyncByte(buffer)) {
@@ -990,11 +1023,44 @@ void PlaylistFetcher::onDownloadNext() {
return;
}
+ mStartup = false;
++mSeqNumber;
postMonitorQueue();
}
+int32_t PlaylistFetcher::getSeqNumberForDiscontinuity(size_t discontinuitySeq) const {
+ int32_t firstSeqNumberInPlaylist;
+ if (mPlaylist->meta() == NULL
+ || !mPlaylist->meta()->findInt32("media-sequence", &firstSeqNumberInPlaylist)) {
+ firstSeqNumberInPlaylist = 0;
+ }
+
+ size_t curDiscontinuitySeq = mPlaylist->getDiscontinuitySeq();
+ if (discontinuitySeq < curDiscontinuitySeq) {
+ return firstSeqNumberInPlaylist <= 0 ? 0 : (firstSeqNumberInPlaylist - 1);
+ }
+
+ size_t index = 0;
+ while (index < mPlaylist->size()) {
+ sp<AMessage> itemMeta;
+ CHECK(mPlaylist->itemAt( index, NULL /* uri */, &itemMeta));
+
+ int64_t discontinuity;
+ if (itemMeta->findInt64("discontinuity", &discontinuity)) {
+ curDiscontinuitySeq++;
+ }
+
+ if (curDiscontinuitySeq == discontinuitySeq) {
+ return firstSeqNumberInPlaylist + index;
+ }
+
+ ++index;
+ }
+
+ return firstSeqNumberInPlaylist + mPlaylist->size();
+}
+
int32_t PlaylistFetcher::getSeqNumberForTime(int64_t timeUs) const {
int32_t firstSeqNumberInPlaylist;
if (mPlaylist->meta() == NULL || !mPlaylist->meta()->findInt32(
@@ -1027,6 +1093,23 @@ int32_t PlaylistFetcher::getSeqNumberForTime(int64_t timeUs) const {
return firstSeqNumberInPlaylist + index;
}
+const sp<ABuffer> &PlaylistFetcher::setAccessUnitProperties(
+ const sp<ABuffer> &accessUnit, const sp<AnotherPacketSource> &source, bool discard) {
+ sp<MetaData> format = source->getFormat();
+ if (format != NULL) {
+ // for simplicity, store a reference to the format in each unit
+ accessUnit->meta()->setObject("format", format);
+ }
+
+ if (discard) {
+ accessUnit->meta()->setInt32("discard", discard);
+ }
+
+ accessUnit->meta()->setInt32("discontinuitySeq", mDiscontinuitySeq);
+ accessUnit->meta()->setInt64("segmentStartTimeUs", getSegmentStartTimeUs(mSeqNumber));
+ return accessUnit;
+}
+
status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &buffer) {
if (mTSParser == NULL) {
// Use TS_TIMESTAMPS_ARE_ABSOLUTE so pts carry over between fetchers.
@@ -1042,7 +1125,9 @@ status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &bu
mTSParser->signalDiscontinuity(
ATSParser::DISCONTINUITY_SEEK, extra);
+ mAbsoluteTimeAnchorUs = mNextPTSTimeUs;
mNextPTSTimeUs = -1ll;
+ mFirstPTSValid = false;
}
size_t offset = 0;
@@ -1102,21 +1187,23 @@ status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &bu
&& source->dequeueAccessUnit(&accessUnit) == OK) {
CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs));
- if (mMinStartTimeUs > 0) {
- if (timeUs < mMinStartTimeUs) {
- // TODO untested path
- // try a later ts
- int32_t targetDuration;
- mPlaylist->meta()->findInt32("target-duration", &targetDuration);
- int32_t incr = (mMinStartTimeUs - timeUs) / 1000000 / targetDuration;
- if (incr == 0) {
- // increment mSeqNumber by at least one
- incr = 1;
+
+ if (mStartup) {
+ if (!mFirstPTSValid) {
+ mFirstTimeUs = timeUs;
+ mFirstPTSValid = true;
+ }
+ if (mStartTimeUsRelative) {
+ timeUs -= mFirstTimeUs;
+ if (timeUs < 0) {
+ timeUs = 0;
+ }
+ } else if (mAdaptive && timeUs > mStartTimeUs) {
+ int32_t seq;
+ if (mStartTimeUsNotify != NULL
+ && !mStartTimeUsNotify->findInt32("discontinuitySeq", &seq)) {
+ mStartTimeUsNotify->setInt32("discontinuitySeq", mDiscontinuitySeq);
}
- mSeqNumber += incr;
- err = -EAGAIN;
- break;
- } else {
int64_t startTimeUs;
if (mStartTimeUsNotify != NULL
&& !mStartTimeUsNotify->findInt64(key, &startTimeUs)) {
@@ -1133,12 +1220,51 @@ status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &bu
}
}
}
+
+ if (timeUs < mStartTimeUs) {
+ if (mAdaptive) {
+ int32_t targetDuration;
+ mPlaylist->meta()->findInt32("target-duration", &targetDuration);
+ int32_t incr = (mStartTimeUs - timeUs) / 1000000 / targetDuration;
+ if (incr == 0) {
+ // increment mSeqNumber by at least one
+ incr = 1;
+ }
+ mSeqNumber += incr;
+ err = -EAGAIN;
+ break;
+ } else {
+ // buffer up to the closest preceding IDR frame
+ ALOGV("timeUs %" PRId64 " us < mStartTimeUs %" PRId64 " us",
+ timeUs, mStartTimeUs);
+ const char *mime;
+ sp<MetaData> format = source->getFormat();
+ bool isAvc = false;
+ if (format != NULL && format->findCString(kKeyMIMEType, &mime)
+ && !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
+ isAvc = true;
+ }
+ if (isAvc && IsIDR(accessUnit)) {
+ mVideoBuffer->clear();
+ }
+ if (isAvc) {
+ mVideoBuffer->queueAccessUnit(accessUnit);
+ }
+
+ continue;
+ }
+ }
}
if (mStopParams != NULL) {
// Queue discontinuity in original stream.
+ int32_t discontinuitySeq;
int64_t stopTimeUs;
- if (!mStopParams->findInt64(key, &stopTimeUs) || timeUs >= stopTimeUs) {
+ if (!mStopParams->findInt32("discontinuitySeq", &discontinuitySeq)
+ || discontinuitySeq > mDiscontinuitySeq
+ || !mStopParams->findInt64(key, &stopTimeUs)
+ || (discontinuitySeq == mDiscontinuitySeq
+ && timeUs >= stopTimeUs)) {
packetSource->queueAccessUnit(mSession->createFormatChangeBuffer());
mStreamTypeMask &= ~stream;
mPacketSources.removeItemsAt(i);
@@ -1147,15 +1273,18 @@ status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &bu
}
// Note that we do NOT dequeue any discontinuities except for format change.
-
- // for simplicity, store a reference to the format in each unit
- sp<MetaData> format = source->getFormat();
- if (format != NULL) {
- accessUnit->meta()->setObject("format", format);
+ if (stream == LiveSession::STREAMTYPE_VIDEO) {
+ const bool discard = true;
+ status_t status;
+ while (mVideoBuffer->hasBufferAvailable(&status)) {
+ sp<ABuffer> videoBuffer;
+ mVideoBuffer->dequeueAccessUnit(&videoBuffer);
+ setAccessUnitProperties(videoBuffer, source, discard);
+ packetSource->queueAccessUnit(videoBuffer);
+ }
}
- // Stash the sequence number so we can hint future playlist where to start at.
- accessUnit->meta()->setInt32("seq", mSeqNumber);
+ setAccessUnitProperties(accessUnit, source);
packetSource->queueAccessUnit(accessUnit);
}
@@ -1181,9 +1310,35 @@ status_t PlaylistFetcher::extractAndQueueAccessUnitsFromTs(const sp<ABuffer> &bu
return OK;
}
+/* static */
+bool PlaylistFetcher::bufferStartsWithWebVTTMagicSequence(
+ const sp<ABuffer> &buffer) {
+ size_t pos = 0;
+
+ // skip possible BOM
+ if (buffer->size() >= pos + 3 &&
+ !memcmp("\xef\xbb\xbf", buffer->data() + pos, 3)) {
+ pos += 3;
+ }
+
+ // accept WEBVTT followed by SPACE, TAB or (CR) LF
+ if (buffer->size() < pos + 6 ||
+ memcmp("WEBVTT", buffer->data() + pos, 6)) {
+ return false;
+ }
+ pos += 6;
+
+ if (buffer->size() == pos) {
+ return true;
+ }
+
+ uint8_t sep = buffer->data()[pos];
+ return sep == ' ' || sep == '\t' || sep == '\n' || sep == '\r';
+}
+
status_t PlaylistFetcher::extractAndQueueAccessUnits(
const sp<ABuffer> &buffer, const sp<AMessage> &itemMeta) {
- if (buffer->size() >= 7 && !memcmp("WEBVTT\n", buffer->data(), 7)) {
+ if (bufferStartsWithWebVTTMagicSequence(buffer)) {
if (mStreamTypeMask != LiveSession::STREAMTYPE_SUBTITLES) {
ALOGE("This stream only contains subtitles.");
return ERROR_MALFORMED;
@@ -1196,7 +1351,8 @@ status_t PlaylistFetcher::extractAndQueueAccessUnits(
CHECK(itemMeta->findInt64("durationUs", &durationUs));
buffer->meta()->setInt64("timeUs", getSegmentStartTimeUs(mSeqNumber));
buffer->meta()->setInt64("durationUs", durationUs);
- buffer->meta()->setInt32("seq", mSeqNumber);
+ buffer->meta()->setInt64("segmentStartTimeUs", getSegmentStartTimeUs(mSeqNumber));
+ buffer->meta()->setInt32("discontinuitySeq", mDiscontinuitySeq);
packetSource->queueAccessUnit(buffer);
return OK;
@@ -1262,14 +1418,6 @@ status_t PlaylistFetcher::extractAndQueueAccessUnits(
firstID3Tag = false;
}
- if (!mFirstPTSValid) {
- mFirstPTSValid = true;
- mFirstPTS = PTS;
- }
- PTS -= mFirstPTS;
-
- int64_t timeUs = (PTS * 100ll) / 9ll + mAbsoluteTimeAnchorUs;
-
if (mStreamTypeMask != LiveSession::STREAMTYPE_AUDIO) {
ALOGW("This stream only contains audio data!");
@@ -1312,6 +1460,12 @@ status_t PlaylistFetcher::extractAndQueueAccessUnits(
int32_t sampleRate;
CHECK(packetSource->getFormat()->findInt32(kKeySampleRate, &sampleRate));
+ int64_t timeUs = (PTS * 100ll) / 9ll;
+ if (!mFirstPTSValid) {
+ mFirstPTSValid = true;
+ mFirstTimeUs = timeUs;
+ }
+
size_t offset = 0;
while (offset < buffer->size()) {
const uint8_t *adtsHeader = buffer->data() + offset;
@@ -1336,19 +1490,32 @@ status_t PlaylistFetcher::extractAndQueueAccessUnits(
CHECK_LE(offset + aac_frame_length, buffer->size());
- sp<ABuffer> unit = new ABuffer(aac_frame_length);
- memcpy(unit->data(), adtsHeader, aac_frame_length);
-
int64_t unitTimeUs = timeUs + numSamples * 1000000ll / sampleRate;
- unit->meta()->setInt64("timeUs", unitTimeUs);
+ offset += aac_frame_length;
// Each AAC frame encodes 1024 samples.
numSamples += 1024;
- unit->meta()->setInt32("seq", mSeqNumber);
- packetSource->queueAccessUnit(unit);
+ if (mStartup) {
+ int64_t startTimeUs = unitTimeUs;
+ if (mStartTimeUsRelative) {
+ startTimeUs -= mFirstTimeUs;
+ if (startTimeUs < 0) {
+ startTimeUs = 0;
+ }
+ }
+ if (startTimeUs < mStartTimeUs) {
+ continue;
+ }
+ }
- offset += aac_frame_length;
+ sp<ABuffer> unit = new ABuffer(aac_frame_length);
+ memcpy(unit->data(), adtsHeader, aac_frame_length);
+
+ unit->meta()->setInt64("timeUs", unitTimeUs);
+ unit->meta()->setInt64("segmentStartTimeUs", getSegmentStartTimeUs(mSeqNumber));
+ unit->meta()->setInt32("discontinuitySeq", mDiscontinuitySeq);
+ packetSource->queueAccessUnit(unit);
}
return OK;
generated by cgit v1.1 at 2024-05-09 22:33:38 +0000