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-rw-r--r--dom/media/webm/NesteggPacketHolder.h20
-rw-r--r--dom/media/webm/WebMDemuxer.cpp27
-rw-r--r--dom/media/webm/WebMDemuxer.h6
3 files changed, 47 insertions, 6 deletions
diff --git a/dom/media/webm/NesteggPacketHolder.h b/dom/media/webm/NesteggPacketHolder.h
index 7c74f752d3..e1e7822106 100644
--- a/dom/media/webm/NesteggPacketHolder.h
+++ b/dom/media/webm/NesteggPacketHolder.h
@@ -25,11 +25,12 @@ class NesteggPacketHolder {
mOffset(-1),
mTimestamp(-1),
mDuration(-1),
+ mDefaultDuration(-1),
mTrack(0),
mIsKeyframe(false) {}
- bool Init(nestegg_packet* aPacket, int64_t aOffset, unsigned aTrack,
- bool aIsKeyframe) {
+ bool Init(nestegg_packet* aPacket, nestegg* aContext, int64_t aOffset,
+ unsigned aTrack, bool aIsKeyframe) {
uint64_t timestamp_ns;
if (nestegg_packet_tstamp(aPacket, &timestamp_ns) == -1) {
return false;
@@ -47,6 +48,10 @@ class NesteggPacketHolder {
if (!nestegg_packet_duration(aPacket, &duration_ns)) {
mDuration = duration_ns / 1000;
}
+ if (!nestegg_track_default_duration(aContext, mTrack, &duration_ns)) {
+ mDefaultDuration = duration_ns / 1000;
+ }
+
return true;
}
@@ -66,6 +71,10 @@ class NesteggPacketHolder {
MOZ_ASSERT(IsInitialized());
return mDuration;
}
+ int64_t DefaultDuration() const {
+ MOZ_ASSERT(IsInitialized());
+ return mDefaultDuration;
+ }
unsigned Track() {
MOZ_ASSERT(IsInitialized());
return mTrack;
@@ -78,7 +87,7 @@ class NesteggPacketHolder {
private:
~NesteggPacketHolder() { nestegg_free_packet(mPacket); }
- bool IsInitialized() { return mOffset >= 0; }
+ bool IsInitialized() const { return mOffset >= 0; }
nestegg_packet* mPacket;
@@ -90,8 +99,13 @@ class NesteggPacketHolder {
int64_t mTimestamp;
// Packet duration in microseconds; -1 if unknown or retrieval failed.
+ // https://www.webmproject.org/docs/container/#BlockDuration
int64_t mDuration;
+ // Default durtaion in microseconds; -1 if unknown or retrieval failed.
+ // https://www.webmproject.org/docs/container/#Duration
+ int64_t mDefaultDuration;
+
// Track ID.
unsigned mTrack;
diff --git a/dom/media/webm/WebMDemuxer.cpp b/dom/media/webm/WebMDemuxer.cpp
index da14118205..48d3d57ed9 100644
--- a/dom/media/webm/WebMDemuxer.cpp
+++ b/dom/media/webm/WebMDemuxer.cpp
@@ -15,6 +15,7 @@
#include "gfx2DGlue.h"
#include "gfxUtils.h"
#include "mozilla/EndianUtils.h"
+#include "mozilla/Maybe.h"
#include "mozilla/SharedThreadPool.h"
#include "MediaDataDemuxer.h"
#include "nsAutoRef.h"
@@ -150,7 +151,9 @@ int WebMDemuxer::NestEggContext::Init() {
WebMDemuxer::WebMDemuxer(MediaResource* aResource)
: WebMDemuxer(aResource, false) {}
-WebMDemuxer::WebMDemuxer(MediaResource* aResource, bool aIsMediaSource)
+WebMDemuxer::WebMDemuxer(
+ MediaResource* aResource, bool aIsMediaSource,
+ Maybe<media::TimeUnit> aFrameEndTimeBeforeRecreateDemuxer)
: mVideoContext(this, aResource),
mAudioContext(this, aResource),
mBufferedState(nullptr),
@@ -169,6 +172,14 @@ WebMDemuxer::WebMDemuxer(MediaResource* aResource, bool aIsMediaSource)
// Audio/video contexts hold a MediaResourceIndex.
DDLINKCHILD("video context", mVideoContext.GetResource());
DDLINKCHILD("audio context", mAudioContext.GetResource());
+
+ MOZ_ASSERT_IF(!aIsMediaSource,
+ aFrameEndTimeBeforeRecreateDemuxer.isNothing());
+ if (aIsMediaSource && aFrameEndTimeBeforeRecreateDemuxer) {
+ mVideoFrameEndTimeBeforeReset = aFrameEndTimeBeforeRecreateDemuxer;
+ WEBM_DEBUG("Set mVideoFrameEndTimeBeforeReset=%" PRId64,
+ mVideoFrameEndTimeBeforeReset->ToMicroseconds());
+ }
}
WebMDemuxer::~WebMDemuxer() {
@@ -588,6 +599,12 @@ nsresult WebMDemuxer::GetNextPacket(TrackInfo::TrackType aType,
}
int64_t tstamp = holder->Timestamp();
int64_t duration = holder->Duration();
+ int64_t defaultDuration = holder->DefaultDuration();
+ if (aType == TrackInfo::TrackType::kVideoTrack) {
+ WEBM_DEBUG("GetNextPacket(video): tstamp=%" PRId64 ", duration=%" PRId64
+ ", defaultDuration=%" PRId64,
+ tstamp, duration, defaultDuration);
+ }
// The end time of this frame is the start time of the next frame. Fetch
// the timestamp of the next packet for this track. If we've reached the
@@ -610,6 +627,12 @@ nsresult WebMDemuxer::GetNextPacket(TrackInfo::TrackType aType,
next_tstamp = tstamp + duration;
} else if (lastFrameTime.isSome()) {
next_tstamp = tstamp + (tstamp - lastFrameTime.ref());
+ } else if (defaultDuration >= 0) {
+ next_tstamp = tstamp + defaultDuration;
+ } else if (mVideoFrameEndTimeBeforeReset) {
+ WEBM_DEBUG("Setting next timestamp to be %" PRId64 " us",
+ mVideoFrameEndTimeBeforeReset->ToMicroseconds());
+ next_tstamp = mVideoFrameEndTimeBeforeReset->ToMicroseconds();
} else if (mIsMediaSource) {
(this->*pushPacket)(holder);
} else {
@@ -930,7 +953,7 @@ nsresult WebMDemuxer::DemuxPacket(TrackInfo::TrackType aType,
int64_t offset = Resource(aType).Tell();
RefPtr<NesteggPacketHolder> holder = new NesteggPacketHolder();
- if (!holder->Init(packet, offset, track, false)) {
+ if (!holder->Init(packet, Context(aType), offset, track, false)) {
WEBM_DEBUG("NesteggPacketHolder::Init: error");
return NS_ERROR_DOM_MEDIA_DEMUXER_ERR;
}
diff --git a/dom/media/webm/WebMDemuxer.h b/dom/media/webm/WebMDemuxer.h
index 3b3bdc21e2..28407908a9 100644
--- a/dom/media/webm/WebMDemuxer.h
+++ b/dom/media/webm/WebMDemuxer.h
@@ -94,7 +94,9 @@ class WebMDemuxer : public MediaDataDemuxer,
explicit WebMDemuxer(MediaResource* aResource);
// Indicate if the WebMDemuxer is to be used with MediaSource. In which
// case the demuxer will stop reads to the last known complete block.
- WebMDemuxer(MediaResource* aResource, bool aIsMediaSource);
+ WebMDemuxer(
+ MediaResource* aResource, bool aIsMediaSource,
+ Maybe<media::TimeUnit> aFrameEndTimeBeforeRecreateDemuxer = Nothing());
RefPtr<InitPromise> Init() override;
@@ -223,6 +225,8 @@ class WebMDemuxer : public MediaDataDemuxer,
Maybe<int64_t> mLastAudioFrameTime;
Maybe<int64_t> mLastVideoFrameTime;
+ Maybe<media::TimeUnit> mVideoFrameEndTimeBeforeReset;
+
// Codec ID of audio track
int mAudioCodec;
// Codec ID of video track
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 22:19:02 +0000