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Bugfix for Vp9 GOF and missing frames.

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In order to correctly determine the references of a frame when using Vp9
with GOF one has to wait for all frames on the lower temporal layers
to make sure no up-switch point is missed.

This patch fix a bug where upon receiving a frame the RtpFrameReferenceFinder
would try to add missing frame for a group with a not yet knows scalability
structure.

BUG=webrtc:5514

Review-Url: https://codereview.webrtc.org/2127073002
Cr-Commit-Position: refs/heads/master@{#13487}
This commit is contained in:
philipel
2016-07-15 06:50:27 -07:00
committed by Commit bot
parent 136778252d
commit c9b27d56c0
3 changed files with 132 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

83
webrtc/modules/video_coding/rtp_frame_reference_finder.cc
View File

@ -368,9 +368,9 @@ void RtpFrameReferenceFinder::ManageFrameVp9(
scalability_structures_[current_ss_idx_] = codec_header.gof;
scalability_structures_[current_ss_idx_].pid_start = frame->picture_id;
auto pid_and_gof = std::make_pair(
frame->picture_id, &scalability_structures_[current_ss_idx_]);
gof_info_.insert(std::make_pair(codec_header.tl0_pic_idx, pid_and_gof));
GofInfo info(&scalability_structures_[current_ss_idx_],
frame->picture_id);
gof_info_.insert(std::make_pair(codec_header.tl0_pic_idx, info));
}
}
@ -385,8 +385,8 @@ void RtpFrameReferenceFinder::ManageFrameVp9(
LOG(LS_WARNING) << "Received keyframe without scalability structure";
frame->num_references = 0;
GofInfoVP9* gof = gof_info_.find(codec_header.tl0_pic_idx)->second.second;
FrameReceivedVp9(frame->picture_id, *gof);
GofInfo info = gof_info_.find(codec_header.tl0_pic_idx)->second;
FrameReceivedVp9(frame->picture_id, &info);
CompletedFrameVp9(std::move(frame));
return;
}
@ -402,14 +402,12 @@ void RtpFrameReferenceFinder::ManageFrameVp9(
return;
}
GofInfoVP9* gof = gof_info_it->second.second;
uint16_t picture_id_tl0 = gof_info_it->second.first;
FrameReceivedVp9(frame->picture_id, *gof);
GofInfo* info = &gof_info_it->second;
FrameReceivedVp9(frame->picture_id, info);
// Make sure we don't miss any frame that could potentially have the
// up switch flag set.
if (MissingRequiredFrameVp9(frame->picture_id, *gof)) {
if (MissingRequiredFrameVp9(frame->picture_id, *info)) {
stashed_frames_.emplace(std::move(frame));
return;
}
@ -424,27 +422,24 @@ void RtpFrameReferenceFinder::ManageFrameVp9(
// then gof info has already been inserted earlier, so we only want to
// insert if we haven't done so already.
if (codec_header.temporal_idx == 0 && !codec_header.ss_data_available) {
auto pid_and_gof = std::make_pair(frame->picture_id, gof);
gof_info_.insert(std::make_pair(codec_header.tl0_pic_idx, pid_and_gof));
GofInfo new_info(info->gof, frame->picture_id);
gof_info_.insert(std::make_pair(codec_header.tl0_pic_idx, new_info));
}
// Clean out old info about up switch frames.
uint16_t old_picture_id = Subtract<kPicIdLength>(last_picture_id_, 50);
uint16_t old_picture_id = Subtract<kPicIdLength>(frame->picture_id, 50);
auto up_switch_erase_to = up_switch_.lower_bound(old_picture_id);
up_switch_.erase(up_switch_.begin(), up_switch_erase_to);
RTC_DCHECK(
(AheadOrAt<uint16_t, kPicIdLength>(frame->picture_id, picture_id_tl0)));
size_t diff =
ForwardDiff<uint16_t, kPicIdLength>(gof->pid_start, frame->picture_id);
size_t gof_idx = diff % gof->num_frames_in_gof;
size_t diff = ForwardDiff<uint16_t, kPicIdLength>(info->gof->pid_start,
frame->picture_id);
size_t gof_idx = diff % info->gof->num_frames_in_gof;
// Populate references according to the scalability structure.
frame->num_references = gof->num_ref_pics[gof_idx];
frame->num_references = info->gof->num_ref_pics[gof_idx];
for (size_t i = 0; i < frame->num_references; ++i) {
frame->references[i] =
Subtract<kPicIdLength>(frame->picture_id, gof->pid_diff[gof_idx][i]);
frame->references[i] = Subtract<kPicIdLength>(
frame->picture_id, info->gof->pid_diff[gof_idx][i]);
// If this is a reference to a frame earlier than the last up switch point,
// then ignore this reference.
@ -458,18 +453,19 @@ void RtpFrameReferenceFinder::ManageFrameVp9(
}
bool RtpFrameReferenceFinder::MissingRequiredFrameVp9(uint16_t picture_id,
const GofInfoVP9& gof) {
size_t diff = ForwardDiff<uint16_t, kPicIdLength>(gof.pid_start, picture_id);
size_t gof_idx = diff % gof.num_frames_in_gof;
size_t temporal_idx = gof.temporal_idx[gof_idx];
const GofInfo& info) {
size_t diff =
ForwardDiff<uint16_t, kPicIdLength>(info.gof->pid_start, picture_id);
size_t gof_idx = diff % info.gof->num_frames_in_gof;
size_t temporal_idx = info.gof->temporal_idx[gof_idx];
// For every reference this frame has, check if there is a frame missing in
// the interval (|ref_pid|, |picture_id|) in any of the lower temporal
// layers. If so, we are missing a required frame.
uint8_t num_references = gof.num_ref_pics[gof_idx];
uint8_t num_references = info.gof->num_ref_pics[gof_idx];
for (size_t i = 0; i < num_references; ++i) {
uint16_t ref_pid =
Subtract<kPicIdLength>(picture_id, gof.pid_diff[gof_idx][i]);
Subtract<kPicIdLength>(picture_id, info.gof->pid_diff[gof_idx][i]);
for (size_t l = 0; l < temporal_idx; ++l) {
auto missing_frame_it = missing_frames_for_layer_[l].lower_bound(ref_pid);
if (missing_frame_it != missing_frames_for_layer_[l].end() &&
@ -482,30 +478,31 @@ bool RtpFrameReferenceFinder::MissingRequiredFrameVp9(uint16_t picture_id,
}
void RtpFrameReferenceFinder::FrameReceivedVp9(uint16_t picture_id,
const GofInfoVP9& gof) {
RTC_DCHECK_NE(-1, last_picture_id_);
GofInfo* info) {
int last_picture_id = info->last_picture_id;
// If there is a gap, find which temporal layer the missing frames
// belong to and add the frame as missing for that temporal layer.
// Otherwise, remove this frame from the set of missing frames.
if (AheadOf<uint16_t, kPicIdLength>(picture_id, last_picture_id_)) {
size_t diff =
ForwardDiff<uint16_t, kPicIdLength>(gof.pid_start, last_picture_id_);
size_t gof_idx = diff % gof.num_frames_in_gof;
if (AheadOf<uint16_t, kPicIdLength>(picture_id, last_picture_id)) {
size_t diff = ForwardDiff<uint16_t, kPicIdLength>(info->gof->pid_start,
last_picture_id);
size_t gof_idx = diff % info->gof->num_frames_in_gof;
last_picture_id_ = Add<kPicIdLength>(last_picture_id_, 1);
while (last_picture_id_ != picture_id) {
last_picture_id = Add<kPicIdLength>(last_picture_id, 1);
while (last_picture_id != picture_id) {
++gof_idx;
RTC_DCHECK_NE(0ul, gof_idx % gof.num_frames_in_gof);
size_t temporal_idx = gof.temporal_idx[gof_idx];
missing_frames_for_layer_[temporal_idx].insert(last_picture_id_);
last_picture_id_ = Add<kPicIdLength>(last_picture_id_, 1);
RTC_DCHECK_NE(0ul, gof_idx % info->gof->num_frames_in_gof);
size_t temporal_idx = info->gof->temporal_idx[gof_idx];
missing_frames_for_layer_[temporal_idx].insert(last_picture_id);
last_picture_id = Add<kPicIdLength>(last_picture_id, 1);
}
info->last_picture_id = last_picture_id;
} else {
size_t diff =
ForwardDiff<uint16_t, kPicIdLength>(gof.pid_start, picture_id);
size_t gof_idx = diff % gof.num_frames_in_gof;
size_t temporal_idx = gof.temporal_idx[gof_idx];
ForwardDiff<uint16_t, kPicIdLength>(info->gof->pid_start, picture_id);
size_t gof_idx = diff % info->gof->num_frames_in_gof;
size_t temporal_idx = info->gof->temporal_idx[gof_idx];
missing_frames_for_layer_[temporal_idx].erase(picture_id);
}
}