blob: 868abd7ad87c023302ef591367ff02fafb49d8e7 [file] [log] [blame]
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/filters/source_buffer_state.h"
#include <set>
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "media/base/media_switches.h"
#include "media/base/media_track.h"
#include "media/base/media_tracks.h"
#include "media/base/mime_util.h"
#include "media/filters/chunk_demuxer.h"
#include "media/filters/frame_processor.h"
#include "media/filters/source_buffer_stream.h"
namespace media {
enum {
// Limits the number of MEDIA_LOG() calls warning the user that a muxed stream
// media segment is missing a block from at least one of the audio or video
// tracks.
kMaxMissingTrackInSegmentLogs = 10,
};
namespace {
TimeDelta EndTimestamp(const StreamParser::BufferQueue& queue) {
return queue.back()->timestamp() + queue.back()->duration();
}
// Check the input |text_configs| and |bytestream_ids| and return false if
// duplicate track ids are detected.
bool CheckBytestreamTrackIds(
const MediaTracks& tracks,
const StreamParser::TextTrackConfigMap& text_configs) {
std::set<StreamParser::TrackId> bytestream_ids;
for (const auto& track : tracks.tracks()) {
const StreamParser::TrackId& track_id = track->bytestream_track_id();
if (bytestream_ids.find(track_id) != bytestream_ids.end()) {
return false;
}
bytestream_ids.insert(track_id);
}
for (const auto& text_track : text_configs) {
const StreamParser::TrackId& track_id = text_track.first;
if (bytestream_ids.find(track_id) != bytestream_ids.end()) {
return false;
}
bytestream_ids.insert(track_id);
}
return true;
}
} // namespace
// List of time ranges for each SourceBuffer.
// static
Ranges<TimeDelta> SourceBufferState::ComputeRangesIntersection(
const RangesList& active_ranges,
bool ended) {
// TODO(servolk): Perhaps this can be removed in favor of blink implementation
// (MediaSource::buffered)? Currently this is only used on Android and for
// updating DemuxerHost's buffered ranges during AppendData() as well as
// SourceBuffer.buffered property implementation.
// Implementation of HTMLMediaElement.buffered algorithm in MSE spec.
// https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#dom-htmlmediaelement.buffered
// Step 1: If activeSourceBuffers.length equals 0 then return an empty
// TimeRanges object and abort these steps.
if (active_ranges.empty())
return Ranges<TimeDelta>();
// Step 2: Let active ranges be the ranges returned by buffered for each
// SourceBuffer object in activeSourceBuffers.
// Step 3: Let highest end time be the largest range end time in the active
// ranges.
TimeDelta highest_end_time;
for (const auto& range : active_ranges) {
if (!range.size())
continue;
highest_end_time = std::max(highest_end_time, range.end(range.size() - 1));
}
// Step 4: Let intersection ranges equal a TimeRange object containing a
// single range from 0 to highest end time.
Ranges<TimeDelta> intersection_ranges;
intersection_ranges.Add(TimeDelta(), highest_end_time);
// Step 5: For each SourceBuffer object in activeSourceBuffers run the
// following steps:
for (const auto& range : active_ranges) {
// Step 5.1: Let source ranges equal the ranges returned by the buffered
// attribute on the current SourceBuffer.
Ranges<TimeDelta> source_ranges = range;
// Step 5.2: If readyState is "ended", then set the end time on the last
// range in source ranges to highest end time.
if (ended && source_ranges.size()) {
source_ranges.Add(source_ranges.start(source_ranges.size() - 1),
highest_end_time);
}
// Step 5.3: Let new intersection ranges equal the intersection between
// the intersection ranges and the source ranges.
// Step 5.4: Replace the ranges in intersection ranges with the new
// intersection ranges.
intersection_ranges = intersection_ranges.IntersectionWith(source_ranges);
}
return intersection_ranges;
}
SourceBufferState::SourceBufferState(
std::unique_ptr<StreamParser> stream_parser,
std::unique_ptr<FrameProcessor> frame_processor,
const CreateDemuxerStreamCB& create_demuxer_stream_cb,
const scoped_refptr<MediaLog>& media_log)
: create_demuxer_stream_cb_(create_demuxer_stream_cb),
timestamp_offset_during_append_(NULL),
parsing_media_segment_(false),
stream_parser_(stream_parser.release()),
frame_processor_(frame_processor.release()),
media_log_(media_log),
state_(UNINITIALIZED),
auto_update_timestamp_offset_(false) {
DCHECK(!create_demuxer_stream_cb_.is_null());
DCHECK(frame_processor_);
}
SourceBufferState::~SourceBufferState() {
Shutdown();
}
void SourceBufferState::Init(
const StreamParser::InitCB& init_cb,
const std::string& expected_codecs,
const StreamParser::EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
const NewTextTrackCB& new_text_track_cb) {
DCHECK_EQ(state_, UNINITIALIZED);
new_text_track_cb_ = new_text_track_cb;
init_cb_ = init_cb;
std::vector<std::string> expected_codecs_parsed;
ParseCodecString(expected_codecs, &expected_codecs_parsed, false);
std::vector<AudioCodec> expected_acodecs;
std::vector<VideoCodec> expected_vcodecs;
for (const auto& codec_id : expected_codecs_parsed) {
AudioCodec acodec = StringToAudioCodec(codec_id);
if (acodec != kUnknownAudioCodec) {
expected_audio_codecs_.push_back(acodec);
continue;
}
VideoCodec vcodec = StringToVideoCodec(codec_id);
if (vcodec != kUnknownVideoCodec) {
expected_video_codecs_.push_back(vcodec);
continue;
}
MEDIA_LOG(INFO, media_log_) << "Unrecognized media codec: " << codec_id;
}
state_ = PENDING_PARSER_CONFIG;
stream_parser_->Init(
base::Bind(&SourceBufferState::OnSourceInitDone, base::Unretained(this)),
base::Bind(&SourceBufferState::OnNewConfigs, base::Unretained(this),
expected_codecs),
base::Bind(&SourceBufferState::OnNewBuffers, base::Unretained(this)),
new_text_track_cb_.is_null(), encrypted_media_init_data_cb,
base::Bind(&SourceBufferState::OnNewMediaSegment, base::Unretained(this)),
base::Bind(&SourceBufferState::OnEndOfMediaSegment,
base::Unretained(this)),
media_log_);
}
void SourceBufferState::SetSequenceMode(bool sequence_mode) {
DCHECK(!parsing_media_segment_);
frame_processor_->SetSequenceMode(sequence_mode);
}
void SourceBufferState::SetGroupStartTimestampIfInSequenceMode(
base::TimeDelta timestamp_offset) {
DCHECK(!parsing_media_segment_);
frame_processor_->SetGroupStartTimestampIfInSequenceMode(timestamp_offset);
}
void SourceBufferState::SetTracksWatcher(
const Demuxer::MediaTracksUpdatedCB& tracks_updated_cb) {
DCHECK(init_segment_received_cb_.is_null());
DCHECK(!tracks_updated_cb.is_null());
init_segment_received_cb_ = tracks_updated_cb;
}
bool SourceBufferState::Append(const uint8_t* data,
size_t length,
TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset) {
append_in_progress_ = true;
DCHECK(timestamp_offset);
DCHECK(!timestamp_offset_during_append_);
append_window_start_during_append_ = append_window_start;
append_window_end_during_append_ = append_window_end;
timestamp_offset_during_append_ = timestamp_offset;
// TODO(wolenetz/acolwell): Curry and pass a NewBuffersCB here bound with
// append window and timestamp offset pointer. See http://crbug.com/351454.
bool result = stream_parser_->Parse(data, length);
if (!result) {
MEDIA_LOG(ERROR, media_log_)
<< __func__ << ": stream parsing failed. Data size=" << length
<< " append_window_start=" << append_window_start.InSecondsF()
<< " append_window_end=" << append_window_end.InSecondsF();
}
timestamp_offset_during_append_ = NULL;
append_in_progress_ = false;
return result;
}
void SourceBufferState::ResetParserState(TimeDelta append_window_start,
TimeDelta append_window_end,
base::TimeDelta* timestamp_offset) {
DCHECK(timestamp_offset);
DCHECK(!timestamp_offset_during_append_);
timestamp_offset_during_append_ = timestamp_offset;
append_window_start_during_append_ = append_window_start;
append_window_end_during_append_ = append_window_end;
stream_parser_->Flush();
timestamp_offset_during_append_ = NULL;
frame_processor_->Reset();
parsing_media_segment_ = false;
media_segment_has_data_for_track_.clear();
}
void SourceBufferState::Remove(TimeDelta start,
TimeDelta end,
TimeDelta duration) {
for (const auto& it : audio_streams_) {
it.second->Remove(start, end, duration);
}
for (const auto& it : video_streams_) {
it.second->Remove(start, end, duration);
}
for (const auto& it : text_streams_) {
it.second->Remove(start, end, duration);
}
}
bool SourceBufferState::EvictCodedFrames(DecodeTimestamp media_time,
size_t newDataSize) {
size_t total_buffered_size = 0;
for (const auto& it : audio_streams_)
total_buffered_size += it.second->GetBufferedSize();
for (const auto& it : video_streams_)
total_buffered_size += it.second->GetBufferedSize();
for (const auto& it : text_streams_)
total_buffered_size += it.second->GetBufferedSize();
DVLOG(3) << __func__ << " media_time=" << media_time.InSecondsF()
<< " newDataSize=" << newDataSize
<< " total_buffered_size=" << total_buffered_size;
if (total_buffered_size == 0)
return true;
bool success = true;
for (const auto& it : audio_streams_) {
uint64_t curr_size = it.second->GetBufferedSize();
if (curr_size == 0)
continue;
uint64_t estimated_new_size = newDataSize * curr_size / total_buffered_size;
DCHECK_LE(estimated_new_size, SIZE_MAX);
success &= it.second->EvictCodedFrames(
media_time, static_cast<size_t>(estimated_new_size));
}
for (const auto& it : video_streams_) {
uint64_t curr_size = it.second->GetBufferedSize();
if (curr_size == 0)
continue;
uint64_t estimated_new_size = newDataSize * curr_size / total_buffered_size;
DCHECK_LE(estimated_new_size, SIZE_MAX);
success &= it.second->EvictCodedFrames(
media_time, static_cast<size_t>(estimated_new_size));
}
for (const auto& it : text_streams_) {
uint64_t curr_size = it.second->GetBufferedSize();
if (curr_size == 0)
continue;
uint64_t estimated_new_size = newDataSize * curr_size / total_buffered_size;
DCHECK_LE(estimated_new_size, SIZE_MAX);
success &= it.second->EvictCodedFrames(
media_time, static_cast<size_t>(estimated_new_size));
}
DVLOG(3) << __func__ << " success=" << success;
return success;
}
void SourceBufferState::OnMemoryPressure(
DecodeTimestamp media_time,
base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level,
bool force_instant_gc) {
// Notify video streams about memory pressure first, since video typically
// takes up the most memory and that's where we can expect most savings.
for (const auto& it : video_streams_) {
it.second->OnMemoryPressure(media_time, memory_pressure_level,
force_instant_gc);
}
for (const auto& it : audio_streams_) {
it.second->OnMemoryPressure(media_time, memory_pressure_level,
force_instant_gc);
}
for (const auto& it : text_streams_) {
it.second->OnMemoryPressure(media_time, memory_pressure_level,
force_instant_gc);
}
}
Ranges<TimeDelta> SourceBufferState::GetBufferedRanges(TimeDelta duration,
bool ended) const {
RangesList ranges_list;
for (const auto& it : audio_streams_)
ranges_list.push_back(it.second->GetBufferedRanges(duration));
for (const auto& it : video_streams_)
ranges_list.push_back(it.second->GetBufferedRanges(duration));
for (const auto& it : text_streams_)
ranges_list.push_back(it.second->GetBufferedRanges(duration));
return ComputeRangesIntersection(ranges_list, ended);
}
TimeDelta SourceBufferState::GetHighestPresentationTimestamp() const {
TimeDelta max_pts;
for (const auto& it : audio_streams_) {
max_pts = std::max(max_pts, it.second->GetHighestPresentationTimestamp());
}
for (const auto& it : video_streams_) {
max_pts = std::max(max_pts, it.second->GetHighestPresentationTimestamp());
}
for (const auto& it : text_streams_) {
max_pts = std::max(max_pts, it.second->GetHighestPresentationTimestamp());
}
return max_pts;
}
TimeDelta SourceBufferState::GetMaxBufferedDuration() const {
TimeDelta max_duration;
for (const auto& it : audio_streams_) {
max_duration = std::max(max_duration, it.second->GetBufferedDuration());
}
for (const auto& it : video_streams_) {
max_duration = std::max(max_duration, it.second->GetBufferedDuration());
}
for (const auto& it : text_streams_) {
max_duration = std::max(max_duration, it.second->GetBufferedDuration());
}
return max_duration;
}
void SourceBufferState::StartReturningData() {
for (const auto& it : audio_streams_) {
it.second->StartReturningData();
}
for (const auto& it : video_streams_) {
it.second->StartReturningData();
}
for (const auto& it : text_streams_) {
it.second->StartReturningData();
}
}
void SourceBufferState::AbortReads() {
for (const auto& it : audio_streams_) {
it.second->AbortReads();
}
for (const auto& it : video_streams_) {
it.second->AbortReads();
}
for (const auto& it : text_streams_) {
it.second->AbortReads();
}
}
void SourceBufferState::Seek(TimeDelta seek_time) {
for (const auto& it : audio_streams_) {
it.second->Seek(seek_time);
}
for (const auto& it : video_streams_) {
it.second->Seek(seek_time);
}
for (const auto& it : text_streams_) {
it.second->Seek(seek_time);
}
}
void SourceBufferState::CompletePendingReadIfPossible() {
for (const auto& it : audio_streams_) {
it.second->CompletePendingReadIfPossible();
}
for (const auto& it : video_streams_) {
it.second->CompletePendingReadIfPossible();
}
for (const auto& it : text_streams_) {
it.second->CompletePendingReadIfPossible();
}
}
void SourceBufferState::OnSetDuration(TimeDelta duration) {
for (const auto& it : audio_streams_) {
it.second->OnSetDuration(duration);
}
for (const auto& it : video_streams_) {
it.second->OnSetDuration(duration);
}
for (const auto& it : text_streams_) {
it.second->OnSetDuration(duration);
}
}
void SourceBufferState::MarkEndOfStream() {
for (const auto& it : audio_streams_) {
it.second->MarkEndOfStream();
}
for (const auto& it : video_streams_) {
it.second->MarkEndOfStream();
}
for (const auto& it : text_streams_) {
it.second->MarkEndOfStream();
}
}
void SourceBufferState::UnmarkEndOfStream() {
for (const auto& it : audio_streams_) {
it.second->UnmarkEndOfStream();
}
for (const auto& it : video_streams_) {
it.second->UnmarkEndOfStream();
}
for (const auto& it : text_streams_) {
it.second->UnmarkEndOfStream();
}
}
void SourceBufferState::Shutdown() {
for (const auto& it : audio_streams_) {
it.second->Shutdown();
}
for (const auto& it : video_streams_) {
it.second->Shutdown();
}
for (const auto& it : text_streams_) {
it.second->Shutdown();
}
}
void SourceBufferState::SetMemoryLimits(DemuxerStream::Type type,
size_t memory_limit) {
switch (type) {
case DemuxerStream::AUDIO:
for (const auto& it : audio_streams_) {
it.second->SetStreamMemoryLimit(memory_limit);
}
break;
case DemuxerStream::VIDEO:
for (const auto& it : video_streams_) {
it.second->SetStreamMemoryLimit(memory_limit);
}
break;
case DemuxerStream::TEXT:
for (const auto& it : text_streams_) {
it.second->SetStreamMemoryLimit(memory_limit);
}
break;
case DemuxerStream::UNKNOWN:
NOTREACHED();
break;
}
}
bool SourceBufferState::IsSeekWaitingForData() const {
for (const auto& it : audio_streams_) {
if (it.second->IsSeekWaitingForData())
return true;
}
for (const auto& it : video_streams_) {
if (it.second->IsSeekWaitingForData())
return true;
}
// NOTE: We are intentionally not checking the text tracks
// because text tracks are discontinuous and may not have data
// for the seek position. This is ok and playback should not be
// stalled because we don't have cues. If cues, with timestamps after
// the seek time, eventually arrive they will be delivered properly
// in response to ChunkDemuxerStream::Read() calls.
return false;
}
bool SourceBufferState::OnNewConfigs(
std::string expected_codecs,
std::unique_ptr<MediaTracks> tracks,
const StreamParser::TextTrackConfigMap& text_configs) {
DCHECK(tracks.get());
DVLOG(1) << __func__ << " expected_codecs=" << expected_codecs
<< " tracks=" << tracks->tracks().size();
DCHECK_GE(state_, PENDING_PARSER_CONFIG);
// Check that there is no clashing bytestream track ids.
if (!CheckBytestreamTrackIds(*tracks, text_configs)) {
MEDIA_LOG(ERROR, media_log_) << "Duplicate bytestream track ids detected";
for (const auto& track : tracks->tracks()) {
const StreamParser::TrackId& track_id = track->bytestream_track_id();
MEDIA_LOG(DEBUG, media_log_) << TrackTypeToStr(track->type()) << " track "
<< " bytestream track id=" << track_id;
}
return false;
}
// MSE spec allows new configs to be emitted only during Append, but not
// during Flush or parser reset operations.
CHECK(append_in_progress_);
bool success = true;
// TODO(wolenetz): Update codec string strictness, if necessary, once spec
// issue https://github.com/w3c/media-source/issues/161 is resolved.
std::vector<AudioCodec> expected_acodecs = expected_audio_codecs_;
std::vector<VideoCodec> expected_vcodecs = expected_video_codecs_;
FrameProcessor::TrackIdChanges track_id_changes;
for (const auto& track : tracks->tracks()) {
const auto& track_id = track->bytestream_track_id();
if (track->type() == MediaTrack::Audio) {
AudioDecoderConfig audio_config = tracks->getAudioConfig(track_id);
DVLOG(1) << "Audio track_id=" << track_id
<< " config: " << audio_config.AsHumanReadableString();
DCHECK(audio_config.IsValidConfig());
const auto& it = std::find(expected_acodecs.begin(),
expected_acodecs.end(), audio_config.codec());
if (it == expected_acodecs.end()) {
MEDIA_LOG(ERROR, media_log_) << "Audio stream codec "
<< GetCodecName(audio_config.codec())
<< " doesn't match SourceBuffer codecs.";
return false;
}
expected_acodecs.erase(it);
ChunkDemuxerStream* stream = nullptr;
if (!first_init_segment_received_) {
DCHECK(audio_streams_.find(track_id) == audio_streams_.end());
stream = create_demuxer_stream_cb_.Run(DemuxerStream::AUDIO);
if (!stream || !frame_processor_->AddTrack(track_id, stream)) {
MEDIA_LOG(ERROR, media_log_) << "Failed to create audio stream.";
return false;
}
audio_streams_[track_id] = stream;
media_log_->SetBooleanProperty("found_audio_stream", true);
media_log_->SetStringProperty("audio_codec_name",
GetCodecName(audio_config.codec()));
} else {
if (audio_streams_.size() > 1) {
auto it = audio_streams_.find(track_id);
if (it != audio_streams_.end())
stream = it->second;
} else {
// If there is only one audio track then bytestream id might change in
// a new init segment. So update our state and notify frame processor.
const auto& it = audio_streams_.begin();
if (it != audio_streams_.end()) {
stream = it->second;
if (it->first != track_id) {
track_id_changes[it->first] = track_id;
audio_streams_[track_id] = stream;
audio_streams_.erase(it->first);
}
}
}
if (!stream) {
MEDIA_LOG(ERROR, media_log_) << "Got unexpected audio track"
<< " track_id=" << track_id;
return false;
}
}
track->set_id(stream->media_track_id());
frame_processor_->OnPossibleAudioConfigUpdate(audio_config);
success &= stream->UpdateAudioConfig(audio_config, media_log_);
} else if (track->type() == MediaTrack::Video) {
VideoDecoderConfig video_config = tracks->getVideoConfig(track_id);
DVLOG(1) << "Video track_id=" << track_id
<< " config: " << video_config.AsHumanReadableString();
DCHECK(video_config.IsValidConfig());
const auto& it = std::find(expected_vcodecs.begin(),
expected_vcodecs.end(), video_config.codec());
if (it == expected_vcodecs.end()) {
MEDIA_LOG(ERROR, media_log_) << "Video stream codec "
<< GetCodecName(video_config.codec())
<< " doesn't match SourceBuffer codecs.";
return false;
}
expected_vcodecs.erase(it);
ChunkDemuxerStream* stream = nullptr;
if (!first_init_segment_received_) {
DCHECK(video_streams_.find(track_id) == video_streams_.end());
stream = create_demuxer_stream_cb_.Run(DemuxerStream::VIDEO);
if (!stream || !frame_processor_->AddTrack(track_id, stream)) {
MEDIA_LOG(ERROR, media_log_) << "Failed to create video stream.";
return false;
}
video_streams_[track_id] = stream;
media_log_->SetBooleanProperty("found_video_stream", true);
media_log_->SetStringProperty("video_codec_name",
GetCodecName(video_config.codec()));
} else {
if (video_streams_.size() > 1) {
auto it = video_streams_.find(track_id);
if (it != video_streams_.end())
stream = it->second;
} else {
// If there is only one video track then bytestream id might change in
// a new init segment. So update our state and notify frame processor.
const auto& it = video_streams_.begin();
if (it != video_streams_.end()) {
stream = it->second;
if (it->first != track_id) {
track_id_changes[it->first] = track_id;
video_streams_[track_id] = stream;
video_streams_.erase(it->first);
}
}
}
if (!stream) {
MEDIA_LOG(ERROR, media_log_) << "Got unexpected video track"
<< " track_id=" << track_id;
return false;
}
}
track->set_id(stream->media_track_id());
success &= stream->UpdateVideoConfig(video_config, media_log_);
} else {
MEDIA_LOG(ERROR, media_log_) << "Error: unsupported media track type "
<< track->type();
return false;
}
}
if (!expected_acodecs.empty() || !expected_vcodecs.empty()) {
for (const auto& acodec : expected_acodecs) {
MEDIA_LOG(ERROR, media_log_) << "Initialization segment misses expected "
<< GetCodecName(acodec) << " track.";
}
for (const auto& vcodec : expected_vcodecs) {
MEDIA_LOG(ERROR, media_log_) << "Initialization segment misses expected "
<< GetCodecName(vcodec) << " track.";
}
return false;
}
if (text_streams_.empty()) {
for (auto itr = text_configs.begin(); itr != text_configs.end(); ++itr) {
ChunkDemuxerStream* const text_stream =
create_demuxer_stream_cb_.Run(DemuxerStream::TEXT);
if (!frame_processor_->AddTrack(itr->first, text_stream)) {
success &= false;
MEDIA_LOG(ERROR, media_log_) << "Failed to add text track ID "
<< itr->first << " to frame processor.";
break;
}
text_stream->UpdateTextConfig(itr->second, media_log_);
text_streams_[itr->first] = text_stream;
new_text_track_cb_.Run(text_stream, itr->second);
}
} else {
const size_t text_count = text_streams_.size();
if (text_configs.size() != text_count) {
success &= false;
MEDIA_LOG(ERROR, media_log_)
<< "The number of text track configs changed.";
} else if (text_count == 1) {
auto config_itr = text_configs.begin();
auto stream_itr = text_streams_.begin();
ChunkDemuxerStream* text_stream = stream_itr->second;
TextTrackConfig old_config = text_stream->text_track_config();
TextTrackConfig new_config(
config_itr->second.kind(), config_itr->second.label(),
config_itr->second.language(), old_config.id());
if (!new_config.Matches(old_config)) {
success &= false;
MEDIA_LOG(ERROR, media_log_)
<< "New text track config does not match old one.";
} else {
StreamParser::TrackId old_id = stream_itr->first;
StreamParser::TrackId new_id = config_itr->first;
if (new_id != old_id) {
track_id_changes[old_id] = new_id;
text_streams_.erase(old_id);
text_streams_[new_id] = text_stream;
}
}
} else {
for (auto config_itr = text_configs.begin();
config_itr != text_configs.end(); ++config_itr) {
auto stream_itr = text_streams_.find(config_itr->first);
if (stream_itr == text_streams_.end()) {
success &= false;
MEDIA_LOG(ERROR, media_log_)
<< "Unexpected text track configuration for track ID "
<< config_itr->first;
break;
}
const TextTrackConfig& new_config = config_itr->second;
ChunkDemuxerStream* stream = stream_itr->second;
TextTrackConfig old_config = stream->text_track_config();
if (!new_config.Matches(old_config)) {
success &= false;
MEDIA_LOG(ERROR, media_log_) << "New text track config for track ID "
<< config_itr->first
<< " does not match old one.";
break;
}
}
}
}
if (audio_streams_.empty() && video_streams_.empty()) {
DVLOG(1) << __func__ << ": couldn't find a valid audio or video stream";
return false;
}
if (!frame_processor_->UpdateTrackIds(track_id_changes)) {
DVLOG(1) << __func__ << ": failed to remap track ids in frame processor";
return false;
}
frame_processor_->SetAllTrackBuffersNeedRandomAccessPoint();
if (!first_init_segment_received_) {
first_init_segment_received_ = true;
SetStreamMemoryLimits();
}
DVLOG(1) << "OnNewConfigs() : " << (success ? "success" : "failed");
if (success) {
if (state_ == PENDING_PARSER_CONFIG)
state_ = PENDING_PARSER_INIT;
DCHECK(!init_segment_received_cb_.is_null());
init_segment_received_cb_.Run(std::move(tracks));
}
return success;
}
void SourceBufferState::SetStreamMemoryLimits() {
auto cmd_line = base::CommandLine::ForCurrentProcess();
std::string audio_buf_limit_switch =
cmd_line->GetSwitchValueASCII(switches::kMSEAudioBufferSizeLimit);
unsigned audio_buf_size_limit = 0;
if (base::StringToUint(audio_buf_limit_switch, &audio_buf_size_limit) &&
audio_buf_size_limit > 0) {
MEDIA_LOG(INFO, media_log_)
<< "Custom audio per-track SourceBuffer size limit="
<< audio_buf_size_limit;
for (const auto& it : audio_streams_) {
it.second->SetStreamMemoryLimit(audio_buf_size_limit);
}
}
std::string video_buf_limit_switch =
cmd_line->GetSwitchValueASCII(switches::kMSEVideoBufferSizeLimit);
unsigned video_buf_size_limit = 0;
if (base::StringToUint(video_buf_limit_switch, &video_buf_size_limit) &&
video_buf_size_limit > 0) {
MEDIA_LOG(INFO, media_log_)
<< "Custom video per-track SourceBuffer size limit="
<< video_buf_size_limit;
for (const auto& it : video_streams_) {
it.second->SetStreamMemoryLimit(video_buf_size_limit);
}
}
}
void SourceBufferState::OnNewMediaSegment() {
DVLOG(2) << "OnNewMediaSegment()";
DCHECK_EQ(state_, PARSER_INITIALIZED);
parsing_media_segment_ = true;
media_segment_has_data_for_track_.clear();
}
void SourceBufferState::OnEndOfMediaSegment() {
DVLOG(2) << "OnEndOfMediaSegment()";
DCHECK_EQ(state_, PARSER_INITIALIZED);
parsing_media_segment_ = false;
for (const auto& it : audio_streams_) {
if (!media_segment_has_data_for_track_[it.first]) {
LIMITED_MEDIA_LOG(DEBUG, media_log_, num_missing_track_logs_,
kMaxMissingTrackInSegmentLogs)
<< "Media segment did not contain any coded frames for track "
<< it.first << ", mismatching initialization segment. Therefore, MSE"
" coded frame processing may not interoperably detect"
" discontinuities in appended media.";
}
}
for (const auto& it : video_streams_) {
if (!media_segment_has_data_for_track_[it.first]) {
LIMITED_MEDIA_LOG(DEBUG, media_log_, num_missing_track_logs_,
kMaxMissingTrackInSegmentLogs)
<< "Media segment did not contain any coded frames for track "
<< it.first << ", mismatching initialization segment. Therefore, MSE"
" coded frame processing may not interoperably detect"
" discontinuities in appended media.";
}
}
}
bool SourceBufferState::OnNewBuffers(
const StreamParser::BufferQueueMap& buffer_queue_map) {
DVLOG(2) << __func__ << " buffer_queues=" << buffer_queue_map.size();
DCHECK_EQ(state_, PARSER_INITIALIZED);
DCHECK(timestamp_offset_during_append_);
DCHECK(parsing_media_segment_);
for (const auto& it : buffer_queue_map) {
const StreamParser::BufferQueue& bufq = it.second;
DCHECK(!bufq.empty());
media_segment_has_data_for_track_[it.first] = true;
}
const TimeDelta timestamp_offset_before_processing =
*timestamp_offset_during_append_;
// Calculate the new timestamp offset for audio/video tracks if the stream
// parser has requested automatic updates.
TimeDelta new_timestamp_offset = timestamp_offset_before_processing;
if (auto_update_timestamp_offset_) {
TimeDelta min_end_timestamp = kNoTimestamp;
for (const auto& it : buffer_queue_map) {
const StreamParser::BufferQueue& bufq = it.second;
DCHECK(!bufq.empty());
if (min_end_timestamp == kNoTimestamp ||
EndTimestamp(bufq) < min_end_timestamp) {
min_end_timestamp = EndTimestamp(bufq);
DCHECK_NE(kNoTimestamp, min_end_timestamp);
}
}
if (min_end_timestamp != kNoTimestamp)
new_timestamp_offset += min_end_timestamp;
}
if (!frame_processor_->ProcessFrames(
buffer_queue_map, append_window_start_during_append_,
append_window_end_during_append_, timestamp_offset_during_append_)) {
return false;
}
// Only update the timestamp offset if the frame processor hasn't already.
if (auto_update_timestamp_offset_ &&
timestamp_offset_before_processing == *timestamp_offset_during_append_) {
*timestamp_offset_during_append_ = new_timestamp_offset;
}
return true;
}
void SourceBufferState::OnSourceInitDone(
const StreamParser::InitParameters& params) {
DCHECK_EQ(state_, PENDING_PARSER_INIT);
state_ = PARSER_INITIALIZED;
auto_update_timestamp_offset_ = params.auto_update_timestamp_offset;
base::ResetAndReturn(&init_cb_).Run(params);
}
} // namespace media