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android / platform / external / chromium_org / 0c52c36 / . / media / filters / chunk_demuxer.cc
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// Copyright (c) 2012 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/chunk_demuxer.h"
#include <algorithm>
#include <limits>
#include <list>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/stl_util.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/bind_to_current_loop.h"
#include "media/base/stream_parser_buffer.h"
#include "media/base/video_decoder_config.h"
#include "media/filters/frame_processor.h"
#include "media/filters/stream_parser_factory.h"
using base::TimeDelta;
namespace media {
static TimeDelta EndTimestamp(const StreamParser::BufferQueue& queue) {
return queue.back()->timestamp() + queue.back()->duration();
}
// List of time ranges for each SourceBuffer.
typedef std::list<Ranges<TimeDelta> > RangesList;
static Ranges<TimeDelta> ComputeIntersection(const RangesList& activeRanges,
bool ended) {
// 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 (activeRanges.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 (RangesList::const_iterator itr = activeRanges.begin();
itr != activeRanges.end(); ++itr) {
if (!itr->size())
continue;
highest_end_time = std::max(highest_end_time, itr->end(itr->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 (RangesList::const_iterator itr = activeRanges.begin();
itr != activeRanges.end(); ++itr) {
// Step 5.1: Let source ranges equal the ranges returned by the buffered
// attribute on the current SourceBuffer.
Ranges<TimeDelta> source_ranges = *itr;
// 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() > 0u) {
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;
}
// Contains state belonging to a source id.
class SourceState {
public:
// Callback signature used to create ChunkDemuxerStreams.
typedef base::Callback<ChunkDemuxerStream*(
DemuxerStream::Type)> CreateDemuxerStreamCB;
typedef base::Callback<void(
ChunkDemuxerStream*, const TextTrackConfig&)> NewTextTrackCB;
SourceState(
scoped_ptr<StreamParser> stream_parser,
scoped_ptr<FrameProcessor> frame_processor, const LogCB& log_cb,
const CreateDemuxerStreamCB& create_demuxer_stream_cb);
~SourceState();
void Init(const StreamParser::InitCB& init_cb,
bool allow_audio,
bool allow_video,
const StreamParser::NeedKeyCB& need_key_cb,
const NewTextTrackCB& new_text_track_cb);
// Appends new data to the StreamParser.
// Returns true if the data was successfully appended. Returns false if an
// error occurred. |*timestamp_offset| is used and possibly updated by the
// append. |append_window_start| and |append_window_end| correspond to the MSE
// spec's similarly named source buffer attributes that are used in coded
// frame processing.
bool Append(const uint8* data, size_t length,
TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset);
// Aborts the current append sequence and resets the parser.
void Abort(TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset);
// Calls Remove(|start|, |end|, |duration|) on all
// ChunkDemuxerStreams managed by this object.
void Remove(TimeDelta start, TimeDelta end, TimeDelta duration);
// Returns true if currently parsing a media segment, or false otherwise.
bool parsing_media_segment() const { return parsing_media_segment_; }
// Sets |frame_processor_|'s sequence mode to |sequence_mode|.
void SetSequenceMode(bool sequence_mode);
// Signals the coded frame processor to update its group start timestamp to be
// |timestamp_offset| if it is in sequence append mode.
void SetGroupStartTimestampIfInSequenceMode(base::TimeDelta timestamp_offset);
// Returns the range of buffered data in this source, capped at |duration|.
// |ended| - Set to true if end of stream has been signaled and the special
// end of stream range logic needs to be executed.
Ranges<TimeDelta> GetBufferedRanges(TimeDelta duration, bool ended) const;
// Returns the highest buffered duration across all streams managed
// by this object.
// Returns TimeDelta() if none of the streams contain buffered data.
TimeDelta GetMaxBufferedDuration() const;
// Helper methods that call methods with similar names on all the
// ChunkDemuxerStreams managed by this object.
void StartReturningData();
void AbortReads();
void Seek(TimeDelta seek_time);
void CompletePendingReadIfPossible();
void OnSetDuration(TimeDelta duration);
void MarkEndOfStream();
void UnmarkEndOfStream();
void Shutdown();
// Sets the memory limit on each stream. |memory_limit| is the
// maximum number of bytes each stream is allowed to hold in its buffer.
void SetMemoryLimitsForTesting(int memory_limit);
bool IsSeekWaitingForData() const;
private:
// Called by the |stream_parser_| when a new initialization segment is
// encountered.
// Returns true on a successful call. Returns false if an error occurred while
// processing decoder configurations.
bool OnNewConfigs(bool allow_audio, bool allow_video,
const AudioDecoderConfig& audio_config,
const VideoDecoderConfig& video_config,
const StreamParser::TextTrackConfigMap& text_configs);
// Called by the |stream_parser_| at the beginning of a new media segment.
void OnNewMediaSegment();
// Called by the |stream_parser_| at the end of a media segment.
void OnEndOfMediaSegment();
// Called by the |stream_parser_| when new buffers have been parsed.
// It processes the new buffers using |frame_processor_|, which includes
// appending the processed frames to associated demuxer streams for each
// frame's track.
// Returns true on a successful call. Returns false if an error occurred while
// processing the buffers.
bool OnNewBuffers(const StreamParser::BufferQueue& audio_buffers,
const StreamParser::BufferQueue& video_buffers,
const StreamParser::TextBufferQueueMap& text_map);
void OnSourceInitDone(bool success,
const StreamParser::InitParameters& params);
CreateDemuxerStreamCB create_demuxer_stream_cb_;
NewTextTrackCB new_text_track_cb_;
// During Append(), if OnNewBuffers() coded frame processing updates the
// timestamp offset then |*timestamp_offset_during_append_| is also updated
// so Append()'s caller can know the new offset. This pointer is only non-NULL
// during the lifetime of an Append() call.
TimeDelta* timestamp_offset_during_append_;
// During Append(), coded frame processing triggered by OnNewBuffers()
// requires these two attributes. These are only valid during the lifetime of
// an Append() call.
TimeDelta append_window_start_during_append_;
TimeDelta append_window_end_during_append_;
// Set to true if the next buffers appended within the append window
// represent the start of a new media segment. This flag being set
// triggers a call to |new_segment_cb_| when the new buffers are
// appended. The flag is set on actual media segment boundaries and
// when the "append window" filtering causes discontinuities in the
// appended data.
// TODO(wolenetz/acolwell): Investigate if we need this, or if coded frame
// processing's discontinuity logic is enough. See http://crbug.com/351489.
bool new_media_segment_;
// Keeps track of whether a media segment is being parsed.
bool parsing_media_segment_;
// The object used to parse appended data.
scoped_ptr<StreamParser> stream_parser_;
ChunkDemuxerStream* audio_; // Not owned by |this|.
ChunkDemuxerStream* video_; // Not owned by |this|.
typedef std::map<StreamParser::TrackId, ChunkDemuxerStream*> TextStreamMap;
TextStreamMap text_stream_map_; // |this| owns the map's stream pointers.
scoped_ptr<FrameProcessor> frame_processor_;
LogCB log_cb_;
StreamParser::InitCB init_cb_;
// Indicates that timestampOffset should be updated automatically during
// OnNewBuffers() based on the earliest end timestamp of the buffers provided.
// TODO(wolenetz): Refactor this function while integrating April 29, 2014
// changes to MSE spec. See http://crbug.com/371499.
bool auto_update_timestamp_offset_;
DISALLOW_COPY_AND_ASSIGN(SourceState);
};
SourceState::SourceState(scoped_ptr<StreamParser> stream_parser,
scoped_ptr<FrameProcessor> frame_processor,
const LogCB& log_cb,
const CreateDemuxerStreamCB& create_demuxer_stream_cb)
: create_demuxer_stream_cb_(create_demuxer_stream_cb),
timestamp_offset_during_append_(NULL),
new_media_segment_(false),
parsing_media_segment_(false),
stream_parser_(stream_parser.release()),
audio_(NULL),
video_(NULL),
frame_processor_(frame_processor.release()),
log_cb_(log_cb),
auto_update_timestamp_offset_(false) {
DCHECK(!create_demuxer_stream_cb_.is_null());
DCHECK(frame_processor_);
}
SourceState::~SourceState() {
Shutdown();
STLDeleteValues(&text_stream_map_);
}
void SourceState::Init(const StreamParser::InitCB& init_cb,
bool allow_audio,
bool allow_video,
const StreamParser::NeedKeyCB& need_key_cb,
const NewTextTrackCB& new_text_track_cb) {
new_text_track_cb_ = new_text_track_cb;
init_cb_ = init_cb;
stream_parser_->Init(
base::Bind(&SourceState::OnSourceInitDone, base::Unretained(this)),
base::Bind(&SourceState::OnNewConfigs,
base::Unretained(this),
allow_audio,
allow_video),
base::Bind(&SourceState::OnNewBuffers, base::Unretained(this)),
new_text_track_cb_.is_null(),
need_key_cb,
base::Bind(&SourceState::OnNewMediaSegment, base::Unretained(this)),
base::Bind(&SourceState::OnEndOfMediaSegment, base::Unretained(this)),
log_cb_);
}
void SourceState::SetSequenceMode(bool sequence_mode) {
DCHECK(!parsing_media_segment_);
frame_processor_->SetSequenceMode(sequence_mode);
}
void SourceState::SetGroupStartTimestampIfInSequenceMode(
base::TimeDelta timestamp_offset) {
DCHECK(!parsing_media_segment_);
frame_processor_->SetGroupStartTimestampIfInSequenceMode(timestamp_offset);
}
bool SourceState::Append(const uint8* data, size_t length,
TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset) {
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 err = stream_parser_->Parse(data, length);
timestamp_offset_during_append_ = NULL;
return err;
}
void SourceState::Abort(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;
}
void SourceState::Remove(TimeDelta start, TimeDelta end, TimeDelta duration) {
if (audio_)
audio_->Remove(start, end, duration);
if (video_)
video_->Remove(start, end, duration);
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->Remove(start, end, duration);
}
}
Ranges<TimeDelta> SourceState::GetBufferedRanges(TimeDelta duration,
bool ended) const {
// TODO(acolwell): When we start allowing disabled tracks we'll need to update
// this code to only add ranges from active tracks.
RangesList ranges_list;
if (audio_)
ranges_list.push_back(audio_->GetBufferedRanges(duration));
if (video_)
ranges_list.push_back(video_->GetBufferedRanges(duration));
for (TextStreamMap::const_iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
ranges_list.push_back(itr->second->GetBufferedRanges(duration));
}
return ComputeIntersection(ranges_list, ended);
}
TimeDelta SourceState::GetMaxBufferedDuration() const {
TimeDelta max_duration;
if (audio_)
max_duration = std::max(max_duration, audio_->GetBufferedDuration());
if (video_)
max_duration = std::max(max_duration, video_->GetBufferedDuration());
for (TextStreamMap::const_iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
max_duration = std::max(max_duration, itr->second->GetBufferedDuration());
}
return max_duration;
}
void SourceState::StartReturningData() {
if (audio_)
audio_->StartReturningData();
if (video_)
video_->StartReturningData();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->StartReturningData();
}
}
void SourceState::AbortReads() {
if (audio_)
audio_->AbortReads();
if (video_)
video_->AbortReads();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->AbortReads();
}
}
void SourceState::Seek(TimeDelta seek_time) {
if (audio_)
audio_->Seek(seek_time);
if (video_)
video_->Seek(seek_time);
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->Seek(seek_time);
}
}
void SourceState::CompletePendingReadIfPossible() {
if (audio_)
audio_->CompletePendingReadIfPossible();
if (video_)
video_->CompletePendingReadIfPossible();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->CompletePendingReadIfPossible();
}
}
void SourceState::OnSetDuration(TimeDelta duration) {
if (audio_)
audio_->OnSetDuration(duration);
if (video_)
video_->OnSetDuration(duration);
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->OnSetDuration(duration);
}
}
void SourceState::MarkEndOfStream() {
if (audio_)
audio_->MarkEndOfStream();
if (video_)
video_->MarkEndOfStream();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->MarkEndOfStream();
}
}
void SourceState::UnmarkEndOfStream() {
if (audio_)
audio_->UnmarkEndOfStream();
if (video_)
video_->UnmarkEndOfStream();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->UnmarkEndOfStream();
}
}
void SourceState::Shutdown() {
if (audio_)
audio_->Shutdown();
if (video_)
video_->Shutdown();
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->Shutdown();
}
}
void SourceState::SetMemoryLimitsForTesting(int memory_limit) {
if (audio_)
audio_->set_memory_limit_for_testing(memory_limit);
if (video_)
video_->set_memory_limit_for_testing(memory_limit);
for (TextStreamMap::iterator itr = text_stream_map_.begin();
itr != text_stream_map_.end(); ++itr) {
itr->second->set_memory_limit_for_testing(memory_limit);
}
}
bool SourceState::IsSeekWaitingForData() const {
if (audio_ && audio_->IsSeekWaitingForData())
return true;
if (video_ && video_->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 SourceState::OnNewConfigs(
bool allow_audio, bool allow_video,
const AudioDecoderConfig& audio_config,
const VideoDecoderConfig& video_config,
const StreamParser::TextTrackConfigMap& text_configs) {
DVLOG(1) << "OnNewConfigs(" << allow_audio << ", " << allow_video
<< ", " << audio_config.IsValidConfig()
<< ", " << video_config.IsValidConfig() << ")";
if (!audio_config.IsValidConfig() && !video_config.IsValidConfig()) {
DVLOG(1) << "OnNewConfigs() : Audio & video config are not valid!";
return false;
}
// Signal an error if we get configuration info for stream types that weren't
// specified in AddId() or more configs after a stream is initialized.
if (allow_audio != audio_config.IsValidConfig()) {
MEDIA_LOG(log_cb_)
<< "Initialization segment"
<< (audio_config.IsValidConfig() ? " has" : " does not have")
<< " an audio track, but the mimetype"
<< (allow_audio ? " specifies" : " does not specify")
<< " an audio codec.";
return false;
}
if (allow_video != video_config.IsValidConfig()) {
MEDIA_LOG(log_cb_)
<< "Initialization segment"
<< (video_config.IsValidConfig() ? " has" : " does not have")
<< " a video track, but the mimetype"
<< (allow_video ? " specifies" : " does not specify")
<< " a video codec.";
return false;
}
bool success = true;
if (audio_config.IsValidConfig()) {
if (!audio_) {
audio_ = create_demuxer_stream_cb_.Run(DemuxerStream::AUDIO);
if (!audio_) {
DVLOG(1) << "Failed to create an audio stream.";
return false;
}
if (!frame_processor_->AddTrack(FrameProcessorBase::kAudioTrackId,
audio_)) {
DVLOG(1) << "Failed to add audio track to frame processor.";
return false;
}
}
frame_processor_->OnPossibleAudioConfigUpdate(audio_config);
success &= audio_->UpdateAudioConfig(audio_config, log_cb_);
}
if (video_config.IsValidConfig()) {
if (!video_) {
video_ = create_demuxer_stream_cb_.Run(DemuxerStream::VIDEO);
if (!video_) {
DVLOG(1) << "Failed to create a video stream.";
return false;
}
if (!frame_processor_->AddTrack(FrameProcessorBase::kVideoTrackId,
video_)) {
DVLOG(1) << "Failed to add video track to frame processor.";
return false;
}
}
success &= video_->UpdateVideoConfig(video_config, log_cb_);
}
typedef StreamParser::TextTrackConfigMap::const_iterator TextConfigItr;
if (text_stream_map_.empty()) {
for (TextConfigItr 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(log_cb_) << "Failed to add text track ID " << itr->first
<< " to frame processor.";
break;
}
text_stream->UpdateTextConfig(itr->second, log_cb_);
text_stream_map_[itr->first] = text_stream;
new_text_track_cb_.Run(text_stream, itr->second);
}
} else {
const size_t text_count = text_stream_map_.size();
if (text_configs.size() != text_count) {
success &= false;
MEDIA_LOG(log_cb_) << "The number of text track configs changed.";
} else if (text_count == 1) {
TextConfigItr config_itr = text_configs.begin();
const TextTrackConfig& new_config = config_itr->second;
TextStreamMap::iterator stream_itr = text_stream_map_.begin();
ChunkDemuxerStream* text_stream = stream_itr->second;
TextTrackConfig old_config = text_stream->text_track_config();
if (!new_config.Matches(old_config)) {
success &= false;
MEDIA_LOG(log_cb_) << "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) {
if (frame_processor_->UpdateTrack(old_id, new_id)) {
text_stream_map_.clear();
text_stream_map_[config_itr->first] = text_stream;
} else {
success &= false;
MEDIA_LOG(log_cb_) << "Error remapping single text track number";
}
}
}
} else {
for (TextConfigItr config_itr = text_configs.begin();
config_itr != text_configs.end(); ++config_itr) {
TextStreamMap::iterator stream_itr =
text_stream_map_.find(config_itr->first);
if (stream_itr == text_stream_map_.end()) {
success &= false;
MEDIA_LOG(log_cb_) << "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(log_cb_) << "New text track config for track ID "
<< config_itr->first
<< " does not match old one.";
break;
}
}
}
}
frame_processor_->SetAllTrackBuffersNeedRandomAccessPoint();
DVLOG(1) << "OnNewConfigs() : " << (success ? "success" : "failed");
return success;
}
void SourceState::OnNewMediaSegment() {
DVLOG(2) << "OnNewMediaSegment()";
parsing_media_segment_ = true;
new_media_segment_ = true;
}
void SourceState::OnEndOfMediaSegment() {
DVLOG(2) << "OnEndOfMediaSegment()";
parsing_media_segment_ = false;
new_media_segment_ = false;
}
bool SourceState::OnNewBuffers(
const StreamParser::BufferQueue& audio_buffers,
const StreamParser::BufferQueue& video_buffers,
const StreamParser::TextBufferQueueMap& text_map) {
DVLOG(2) << "OnNewBuffers()";
DCHECK(timestamp_offset_during_append_);
DCHECK(parsing_media_segment_);
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_) {
const bool have_audio_buffers = !audio_buffers.empty();
const bool have_video_buffers = !video_buffers.empty();
if (have_audio_buffers && have_video_buffers) {
new_timestamp_offset +=
std::min(EndTimestamp(audio_buffers), EndTimestamp(video_buffers));
} else if (have_audio_buffers) {
new_timestamp_offset += EndTimestamp(audio_buffers);
} else if (have_video_buffers) {
new_timestamp_offset += EndTimestamp(video_buffers);
}
}
if (!frame_processor_->ProcessFrames(audio_buffers,
video_buffers,
text_map,
append_window_start_during_append_,
append_window_end_during_append_,
&new_media_segment_,
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 SourceState::OnSourceInitDone(bool success,
const StreamParser::InitParameters& params) {
auto_update_timestamp_offset_ = params.auto_update_timestamp_offset;
base::ResetAndReturn(&init_cb_).Run(success, params);
}
ChunkDemuxerStream::ChunkDemuxerStream(Type type, bool splice_frames_enabled)
: type_(type),
state_(UNINITIALIZED),
splice_frames_enabled_(splice_frames_enabled),
partial_append_window_trimming_enabled_(false) {
}
void ChunkDemuxerStream::StartReturningData() {
DVLOG(1) << "ChunkDemuxerStream::StartReturningData()";
base::AutoLock auto_lock(lock_);
DCHECK(read_cb_.is_null());
ChangeState_Locked(RETURNING_DATA_FOR_READS);
}
void ChunkDemuxerStream::AbortReads() {
DVLOG(1) << "ChunkDemuxerStream::AbortReads()";
base::AutoLock auto_lock(lock_);
ChangeState_Locked(RETURNING_ABORT_FOR_READS);
if (!read_cb_.is_null())
base::ResetAndReturn(&read_cb_).Run(kAborted, NULL);
}
void ChunkDemuxerStream::CompletePendingReadIfPossible() {
base::AutoLock auto_lock(lock_);
if (read_cb_.is_null())
return;
CompletePendingReadIfPossible_Locked();
}
void ChunkDemuxerStream::Shutdown() {
DVLOG(1) << "ChunkDemuxerStream::Shutdown()";
base::AutoLock auto_lock(lock_);
ChangeState_Locked(SHUTDOWN);
// Pass an end of stream buffer to the pending callback to signal that no more
// data will be sent.
if (!read_cb_.is_null()) {
base::ResetAndReturn(&read_cb_).Run(DemuxerStream::kOk,
StreamParserBuffer::CreateEOSBuffer());
}
}
bool ChunkDemuxerStream::IsSeekWaitingForData() const {
base::AutoLock auto_lock(lock_);
// This method should not be called for text tracks. See the note in
// SourceState::IsSeekWaitingForData().
DCHECK_NE(type_, DemuxerStream::TEXT);
return stream_->IsSeekPending();
}
void ChunkDemuxerStream::Seek(TimeDelta time) {
DVLOG(1) << "ChunkDemuxerStream::Seek(" << time.InSecondsF() << ")";
base::AutoLock auto_lock(lock_);
DCHECK(read_cb_.is_null());
DCHECK(state_ == UNINITIALIZED || state_ == RETURNING_ABORT_FOR_READS)
<< state_;
stream_->Seek(time);
}
bool ChunkDemuxerStream::Append(const StreamParser::BufferQueue& buffers) {
if (buffers.empty())
return false;
base::AutoLock auto_lock(lock_);
DCHECK_NE(state_, SHUTDOWN);
if (!stream_->Append(buffers)) {
DVLOG(1) << "ChunkDemuxerStream::Append() : stream append failed";
return false;
}
if (!read_cb_.is_null())
CompletePendingReadIfPossible_Locked();
return true;
}
void ChunkDemuxerStream::Remove(TimeDelta start, TimeDelta end,
TimeDelta duration) {
base::AutoLock auto_lock(lock_);
stream_->Remove(start, end, duration);
}
void ChunkDemuxerStream::OnSetDuration(TimeDelta duration) {
base::AutoLock auto_lock(lock_);
stream_->OnSetDuration(duration);
}
Ranges<TimeDelta> ChunkDemuxerStream::GetBufferedRanges(
TimeDelta duration) const {
base::AutoLock auto_lock(lock_);
if (type_ == TEXT) {
// Since text tracks are discontinuous and the lack of cues should not block
// playback, report the buffered range for text tracks as [0, |duration|) so
// that intesections with audio & video tracks are computed correctly when
// no cues are present.
Ranges<TimeDelta> text_range;
text_range.Add(TimeDelta(), duration);
return text_range;
}
Ranges<TimeDelta> range = stream_->GetBufferedTime();
if (range.size() == 0u)
return range;
// Clamp the end of the stream's buffered ranges to fit within the duration.
// This can be done by intersecting the stream's range with the valid time
// range.
Ranges<TimeDelta> valid_time_range;
valid_time_range.Add(range.start(0), duration);
return range.IntersectionWith(valid_time_range);
}
TimeDelta ChunkDemuxerStream::GetBufferedDuration() const {
return stream_->GetBufferedDuration();
}
void ChunkDemuxerStream::OnNewMediaSegment(TimeDelta start_timestamp) {
DVLOG(2) << "ChunkDemuxerStream::OnNewMediaSegment("
<< start_timestamp.InSecondsF() << ")";
base::AutoLock auto_lock(lock_);
stream_->OnNewMediaSegment(start_timestamp);
}
bool ChunkDemuxerStream::UpdateAudioConfig(const AudioDecoderConfig& config,
const LogCB& log_cb) {
DCHECK(config.IsValidConfig());
DCHECK_EQ(type_, AUDIO);
base::AutoLock auto_lock(lock_);
if (!stream_) {
DCHECK_EQ(state_, UNINITIALIZED);
// On platforms which support splice frames, enable splice frames and
// partial append window support for most codecs (notably: not opus).
const bool codec_supported = config.codec() == kCodecMP3 ||
config.codec() == kCodecAAC ||
config.codec() == kCodecVorbis;
splice_frames_enabled_ = splice_frames_enabled_ && codec_supported;
partial_append_window_trimming_enabled_ =
splice_frames_enabled_ && codec_supported;
stream_.reset(
new SourceBufferStream(config, log_cb, splice_frames_enabled_));
return true;
}
return stream_->UpdateAudioConfig(config);
}
bool ChunkDemuxerStream::UpdateVideoConfig(const VideoDecoderConfig& config,
const LogCB& log_cb) {
DCHECK(config.IsValidConfig());
DCHECK_EQ(type_, VIDEO);
base::AutoLock auto_lock(lock_);
if (!stream_) {
DCHECK_EQ(state_, UNINITIALIZED);
stream_.reset(
new SourceBufferStream(config, log_cb, splice_frames_enabled_));
return true;
}
return stream_->UpdateVideoConfig(config);
}
void ChunkDemuxerStream::UpdateTextConfig(const TextTrackConfig& config,
const LogCB& log_cb) {
DCHECK_EQ(type_, TEXT);
base::AutoLock auto_lock(lock_);
DCHECK(!stream_);
DCHECK_EQ(state_, UNINITIALIZED);
stream_.reset(new SourceBufferStream(config, log_cb, splice_frames_enabled_));
}
void ChunkDemuxerStream::MarkEndOfStream() {
base::AutoLock auto_lock(lock_);
stream_->MarkEndOfStream();
}
void ChunkDemuxerStream::UnmarkEndOfStream() {
base::AutoLock auto_lock(lock_);
stream_->UnmarkEndOfStream();
}
// DemuxerStream methods.
void ChunkDemuxerStream::Read(const ReadCB& read_cb) {
base::AutoLock auto_lock(lock_);
DCHECK_NE(state_, UNINITIALIZED);
DCHECK(read_cb_.is_null());
read_cb_ = BindToCurrentLoop(read_cb);
CompletePendingReadIfPossible_Locked();
}
DemuxerStream::Type ChunkDemuxerStream::type() { return type_; }
void ChunkDemuxerStream::EnableBitstreamConverter() {}
AudioDecoderConfig ChunkDemuxerStream::audio_decoder_config() {
CHECK_EQ(type_, AUDIO);
base::AutoLock auto_lock(lock_);
return stream_->GetCurrentAudioDecoderConfig();
}
VideoDecoderConfig ChunkDemuxerStream::video_decoder_config() {
CHECK_EQ(type_, VIDEO);
base::AutoLock auto_lock(lock_);
return stream_->GetCurrentVideoDecoderConfig();
}
bool ChunkDemuxerStream::SupportsConfigChanges() { return true; }
TextTrackConfig ChunkDemuxerStream::text_track_config() {
CHECK_EQ(type_, TEXT);
base::AutoLock auto_lock(lock_);
return stream_->GetCurrentTextTrackConfig();
}
void ChunkDemuxerStream::ChangeState_Locked(State state) {
lock_.AssertAcquired();
DVLOG(1) << "ChunkDemuxerStream::ChangeState_Locked() : "
<< "type " << type_
<< " - " << state_ << " -> " << state;
state_ = state;
}
ChunkDemuxerStream::~ChunkDemuxerStream() {}
void ChunkDemuxerStream::CompletePendingReadIfPossible_Locked() {
lock_.AssertAcquired();
DCHECK(!read_cb_.is_null());
DemuxerStream::Status status;
scoped_refptr<StreamParserBuffer> buffer;
switch (state_) {
case UNINITIALIZED:
NOTREACHED();
return;
case RETURNING_DATA_FOR_READS:
switch (stream_->GetNextBuffer(&buffer)) {
case SourceBufferStream::kSuccess:
status = DemuxerStream::kOk;
break;
case SourceBufferStream::kNeedBuffer:
// Return early without calling |read_cb_| since we don't have
// any data to return yet.
return;
case SourceBufferStream::kEndOfStream:
status = DemuxerStream::kOk;
buffer = StreamParserBuffer::CreateEOSBuffer();
break;
case SourceBufferStream::kConfigChange:
DVLOG(2) << "Config change reported to ChunkDemuxerStream.";
status = kConfigChanged;
buffer = NULL;
break;
}
break;
case RETURNING_ABORT_FOR_READS:
// Null buffers should be returned in this state since we are waiting
// for a seek. Any buffers in the SourceBuffer should NOT be returned
// because they are associated with the seek.
status = DemuxerStream::kAborted;
buffer = NULL;
break;
case SHUTDOWN:
status = DemuxerStream::kOk;
buffer = StreamParserBuffer::CreateEOSBuffer();
break;
}
base::ResetAndReturn(&read_cb_).Run(status, buffer);
}
ChunkDemuxer::ChunkDemuxer(const base::Closure& open_cb,
const NeedKeyCB& need_key_cb,
const LogCB& log_cb,
bool splice_frames_enabled)
: state_(WAITING_FOR_INIT),
cancel_next_seek_(false),
host_(NULL),
open_cb_(open_cb),
need_key_cb_(need_key_cb),
enable_text_(false),
log_cb_(log_cb),
duration_(kNoTimestamp()),
user_specified_duration_(-1),
liveness_(LIVENESS_UNKNOWN),
splice_frames_enabled_(splice_frames_enabled) {
DCHECK(!open_cb_.is_null());
DCHECK(!need_key_cb_.is_null());
}
void ChunkDemuxer::Initialize(
DemuxerHost* host,
const PipelineStatusCB& cb,
bool enable_text_tracks) {
DVLOG(1) << "Init()";
base::AutoLock auto_lock(lock_);
init_cb_ = BindToCurrentLoop(cb);
if (state_ == SHUTDOWN) {
base::ResetAndReturn(&init_cb_).Run(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
DCHECK_EQ(state_, WAITING_FOR_INIT);
host_ = host;
enable_text_ = enable_text_tracks;
ChangeState_Locked(INITIALIZING);
base::ResetAndReturn(&open_cb_).Run();
}
void ChunkDemuxer::Stop(const base::Closure& callback) {
DVLOG(1) << "Stop()";
Shutdown();
callback.Run();
}
void ChunkDemuxer::Seek(TimeDelta time, const PipelineStatusCB& cb) {
DVLOG(1) << "Seek(" << time.InSecondsF() << ")";
DCHECK(time >= TimeDelta());
base::AutoLock auto_lock(lock_);
DCHECK(seek_cb_.is_null());
seek_cb_ = BindToCurrentLoop(cb);
if (state_ != INITIALIZED && state_ != ENDED) {
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_ERROR_INVALID_STATE);
return;
}
if (cancel_next_seek_) {
cancel_next_seek_ = false;
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
return;
}
SeekAllSources(time);
StartReturningData();
if (IsSeekWaitingForData_Locked()) {
DVLOG(1) << "Seek() : waiting for more data to arrive.";
return;
}
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
}
// Demuxer implementation.
DemuxerStream* ChunkDemuxer::GetStream(DemuxerStream::Type type) {
DCHECK_NE(type, DemuxerStream::TEXT);
base::AutoLock auto_lock(lock_);
if (type == DemuxerStream::VIDEO)
return video_.get();
if (type == DemuxerStream::AUDIO)
return audio_.get();
return NULL;
}
TimeDelta ChunkDemuxer::GetStartTime() const {
return TimeDelta();
}
base::Time ChunkDemuxer::GetTimelineOffset() const {
return timeline_offset_;
}
Demuxer::Liveness ChunkDemuxer::GetLiveness() const {
return liveness_;
}
void ChunkDemuxer::StartWaitingForSeek(TimeDelta seek_time) {
DVLOG(1) << "StartWaitingForSeek()";
base::AutoLock auto_lock(lock_);
DCHECK(state_ == INITIALIZED || state_ == ENDED || state_ == SHUTDOWN ||
state_ == PARSE_ERROR) << state_;
DCHECK(seek_cb_.is_null());
if (state_ == SHUTDOWN || state_ == PARSE_ERROR)
return;
AbortPendingReads();
SeekAllSources(seek_time);
// Cancel state set in CancelPendingSeek() since we want to
// accept the next Seek().
cancel_next_seek_ = false;
}
void ChunkDemuxer::CancelPendingSeek(TimeDelta seek_time) {
base::AutoLock auto_lock(lock_);
DCHECK_NE(state_, INITIALIZING);
DCHECK(seek_cb_.is_null() || IsSeekWaitingForData_Locked());
if (cancel_next_seek_)
return;
AbortPendingReads();
SeekAllSources(seek_time);
if (seek_cb_.is_null()) {
cancel_next_seek_ = true;
return;
}
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
}
ChunkDemuxer::Status ChunkDemuxer::AddId(const std::string& id,
const std::string& type,
std::vector<std::string>& codecs) {
base::AutoLock auto_lock(lock_);
if ((state_ != WAITING_FOR_INIT && state_ != INITIALIZING) || IsValidId(id))
return kReachedIdLimit;
bool has_audio = false;
bool has_video = false;
scoped_ptr<media::StreamParser> stream_parser(
StreamParserFactory::Create(type, codecs, log_cb_,
&has_audio, &has_video));
if (!stream_parser)
return ChunkDemuxer::kNotSupported;
if ((has_audio && !source_id_audio_.empty()) ||
(has_video && !source_id_video_.empty()))
return kReachedIdLimit;
if (has_audio)
source_id_audio_ = id;
if (has_video)
source_id_video_ = id;
scoped_ptr<FrameProcessor> frame_processor(
new FrameProcessor(base::Bind(&ChunkDemuxer::IncreaseDurationIfNecessary,
base::Unretained(this))));
scoped_ptr<SourceState> source_state(
new SourceState(stream_parser.Pass(),
frame_processor.Pass(), log_cb_,
base::Bind(&ChunkDemuxer::CreateDemuxerStream,
base::Unretained(this))));
SourceState::NewTextTrackCB new_text_track_cb;
if (enable_text_) {
new_text_track_cb = base::Bind(&ChunkDemuxer::OnNewTextTrack,
base::Unretained(this));
}
source_state->Init(
base::Bind(&ChunkDemuxer::OnSourceInitDone, base::Unretained(this)),
has_audio,
has_video,
need_key_cb_,
new_text_track_cb);
source_state_map_[id] = source_state.release();
return kOk;
}
void ChunkDemuxer::RemoveId(const std::string& id) {
base::AutoLock auto_lock(lock_);
CHECK(IsValidId(id));
delete source_state_map_[id];
source_state_map_.erase(id);
if (source_id_audio_ == id)
source_id_audio_.clear();
if (source_id_video_ == id)
source_id_video_.clear();
}
Ranges<TimeDelta> ChunkDemuxer::GetBufferedRanges(const std::string& id) const {
base::AutoLock auto_lock(lock_);
DCHECK(!id.empty());
SourceStateMap::const_iterator itr = source_state_map_.find(id);
DCHECK(itr != source_state_map_.end());
return itr->second->GetBufferedRanges(duration_, state_ == ENDED);
}
void ChunkDemuxer::AppendData(const std::string& id,
const uint8* data, size_t length,
TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset) {
DVLOG(1) << "AppendData(" << id << ", " << length << ")";
DCHECK(!id.empty());
DCHECK(timestamp_offset);
Ranges<TimeDelta> ranges;
{
base::AutoLock auto_lock(lock_);
DCHECK_NE(state_, ENDED);
// Capture if any of the SourceBuffers are waiting for data before we start
// parsing.
bool old_waiting_for_data = IsSeekWaitingForData_Locked();
if (length == 0u)
return;
DCHECK(data);
switch (state_) {
case INITIALIZING:
DCHECK(IsValidId(id));
if (!source_state_map_[id]->Append(data, length,
append_window_start,
append_window_end,
timestamp_offset)) {
ReportError_Locked(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
break;
case INITIALIZED: {
DCHECK(IsValidId(id));
if (!source_state_map_[id]->Append(data, length,
append_window_start,
append_window_end,
timestamp_offset)) {
ReportError_Locked(PIPELINE_ERROR_DECODE);
return;
}
} break;
case PARSE_ERROR:
DVLOG(1) << "AppendData(): Ignoring data after a parse error.";
return;
case WAITING_FOR_INIT:
case ENDED:
case SHUTDOWN:
DVLOG(1) << "AppendData(): called in unexpected state " << state_;
return;
}
// Check to see if data was appended at the pending seek point. This
// indicates we have parsed enough data to complete the seek.
if (old_waiting_for_data && !IsSeekWaitingForData_Locked() &&
!seek_cb_.is_null()) {
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
}
ranges = GetBufferedRanges_Locked();
}
for (size_t i = 0; i < ranges.size(); ++i)
host_->AddBufferedTimeRange(ranges.start(i), ranges.end(i));
}
void ChunkDemuxer::Abort(const std::string& id,
TimeDelta append_window_start,
TimeDelta append_window_end,
TimeDelta* timestamp_offset) {
DVLOG(1) << "Abort(" << id << ")";
base::AutoLock auto_lock(lock_);
DCHECK(!id.empty());
CHECK(IsValidId(id));
source_state_map_[id]->Abort(append_window_start,
append_window_end,
timestamp_offset);
}
void ChunkDemuxer::Remove(const std::string& id, TimeDelta start,
TimeDelta end) {
DVLOG(1) << "Remove(" << id << ", " << start.InSecondsF()
<< ", " << end.InSecondsF() << ")";
base::AutoLock auto_lock(lock_);
DCHECK(!id.empty());
CHECK(IsValidId(id));
DCHECK(start >= base::TimeDelta()) << start.InSecondsF();
DCHECK(start < end) << "start " << start.InSecondsF()
<< " end " << end.InSecondsF();
DCHECK(duration_ != kNoTimestamp());
DCHECK(start <= duration_) << "start " << start.InSecondsF()
<< " duration " << duration_.InSecondsF();
if (start == duration_)
return;
source_state_map_[id]->Remove(start, end, duration_);
}
double ChunkDemuxer::GetDuration() {
base::AutoLock auto_lock(lock_);
return GetDuration_Locked();
}
double ChunkDemuxer::GetDuration_Locked() {
lock_.AssertAcquired();
if (duration_ == kNoTimestamp())
return std::numeric_limits<double>::quiet_NaN();
// Return positive infinity if the resource is unbounded.
// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#dom-media-duration
if (duration_ == kInfiniteDuration())
return std::numeric_limits<double>::infinity();
if (user_specified_duration_ >= 0)
return user_specified_duration_;
return duration_.InSecondsF();
}
void ChunkDemuxer::SetDuration(double duration) {
base::AutoLock auto_lock(lock_);
DVLOG(1) << "SetDuration(" << duration << ")";
DCHECK_GE(duration, 0);
if (duration == GetDuration_Locked())
return;
// Compute & bounds check the TimeDelta representation of duration.
// This can be different if the value of |duration| doesn't fit the range or
// precision of TimeDelta.
TimeDelta min_duration = TimeDelta::FromInternalValue(1);
// Don't use TimeDelta::Max() here, as we want the largest finite time delta.
TimeDelta max_duration = TimeDelta::FromInternalValue(kint64max - 1);
double min_duration_in_seconds = min_duration.InSecondsF();
double max_duration_in_seconds = max_duration.InSecondsF();
TimeDelta duration_td;
if (duration == std::numeric_limits<double>::infinity()) {
duration_td = media::kInfiniteDuration();
} else if (duration < min_duration_in_seconds) {
duration_td = min_duration;
} else if (duration > max_duration_in_seconds) {
duration_td = max_duration;
} else {
duration_td = TimeDelta::FromMicroseconds(
duration * base::Time::kMicrosecondsPerSecond);
}
DCHECK(duration_td > TimeDelta());
user_specified_duration_ = duration;
duration_ = duration_td;
host_->SetDuration(duration_);
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->OnSetDuration(duration_);
}
}
bool ChunkDemuxer::IsParsingMediaSegment(const std::string& id) {
base::AutoLock auto_lock(lock_);
DVLOG(1) << "IsParsingMediaSegment(" << id << ")";
CHECK(IsValidId(id));
return source_state_map_[id]->parsing_media_segment();
}
void ChunkDemuxer::SetSequenceMode(const std::string& id,
bool sequence_mode) {
base::AutoLock auto_lock(lock_);
DVLOG(1) << "SetSequenceMode(" << id << ", " << sequence_mode << ")";
CHECK(IsValidId(id));
DCHECK_NE(state_, ENDED);
source_state_map_[id]->SetSequenceMode(sequence_mode);
}
void ChunkDemuxer::SetGroupStartTimestampIfInSequenceMode(
const std::string& id,
base::TimeDelta timestamp_offset) {
base::AutoLock auto_lock(lock_);
DVLOG(1) << "SetGroupStartTimestampIfInSequenceMode(" << id << ", "
<< timestamp_offset.InSecondsF() << ")";
CHECK(IsValidId(id));
DCHECK_NE(state_, ENDED);
source_state_map_[id]->SetGroupStartTimestampIfInSequenceMode(
timestamp_offset);
}
void ChunkDemuxer::MarkEndOfStream(PipelineStatus status) {
DVLOG(1) << "MarkEndOfStream(" << status << ")";
base::AutoLock auto_lock(lock_);
DCHECK_NE(state_, WAITING_FOR_INIT);
DCHECK_NE(state_, ENDED);
if (state_ == SHUTDOWN || state_ == PARSE_ERROR)
return;
if (state_ == INITIALIZING) {
ReportError_Locked(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
bool old_waiting_for_data = IsSeekWaitingForData_Locked();
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->MarkEndOfStream();
}
CompletePendingReadsIfPossible();
// Give a chance to resume the pending seek process.
if (status != PIPELINE_OK) {
ReportError_Locked(status);
return;
}
ChangeState_Locked(ENDED);
DecreaseDurationIfNecessary();
if (old_waiting_for_data && !IsSeekWaitingForData_Locked() &&
!seek_cb_.is_null()) {
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK);
}
}
void ChunkDemuxer::UnmarkEndOfStream() {
DVLOG(1) << "UnmarkEndOfStream()";
base::AutoLock auto_lock(lock_);
DCHECK_EQ(state_, ENDED);
ChangeState_Locked(INITIALIZED);
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->UnmarkEndOfStream();
}
}
void ChunkDemuxer::Shutdown() {
DVLOG(1) << "Shutdown()";
base::AutoLock auto_lock(lock_);
if (state_ == SHUTDOWN)
return;
ShutdownAllStreams();
ChangeState_Locked(SHUTDOWN);
if(!seek_cb_.is_null())
base::ResetAndReturn(&seek_cb_).Run(PIPELINE_ERROR_ABORT);
}
void ChunkDemuxer::SetMemoryLimitsForTesting(int memory_limit) {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->SetMemoryLimitsForTesting(memory_limit);
}
}
void ChunkDemuxer::ChangeState_Locked(State new_state) {
lock_.AssertAcquired();
DVLOG(1) << "ChunkDemuxer::ChangeState_Locked() : "
<< state_ << " -> " << new_state;
state_ = new_state;
}
ChunkDemuxer::~ChunkDemuxer() {
DCHECK_NE(state_, INITIALIZED);
STLDeleteValues(&source_state_map_);
}
void ChunkDemuxer::ReportError_Locked(PipelineStatus error) {
DVLOG(1) << "ReportError_Locked(" << error << ")";
lock_.AssertAcquired();
DCHECK_NE(error, PIPELINE_OK);
ChangeState_Locked(PARSE_ERROR);
PipelineStatusCB cb;
if (!init_cb_.is_null()) {
std::swap(cb, init_cb_);
} else {
if (!seek_cb_.is_null())
std::swap(cb, seek_cb_);
ShutdownAllStreams();
}
if (!cb.is_null()) {
cb.Run(error);
return;
}
base::AutoUnlock auto_unlock(lock_);
host_->OnDemuxerError(error);
}
bool ChunkDemuxer::IsSeekWaitingForData_Locked() const {
lock_.AssertAcquired();
for (SourceStateMap::const_iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
if (itr->second->IsSeekWaitingForData())
return true;
}
return false;
}
void ChunkDemuxer::OnSourceInitDone(
bool success,
const StreamParser::InitParameters& params) {
DVLOG(1) << "OnSourceInitDone(" << success << ", "
<< params.duration.InSecondsF() << ")";
lock_.AssertAcquired();
DCHECK_EQ(state_, INITIALIZING);
if (!success || (!audio_ && !video_)) {
ReportError_Locked(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
if (params.duration != TimeDelta() && duration_ == kNoTimestamp())
UpdateDuration(params.duration);
if (!params.timeline_offset.is_null()) {
if (!timeline_offset_.is_null() &&
params.timeline_offset != timeline_offset_) {
MEDIA_LOG(log_cb_)
<< "Timeline offset is not the same across all SourceBuffers.";
ReportError_Locked(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
timeline_offset_ = params.timeline_offset;
}
if (params.liveness != LIVENESS_UNKNOWN) {
if (liveness_ != LIVENESS_UNKNOWN && params.liveness != liveness_) {
MEDIA_LOG(log_cb_)
<< "Liveness is not the same across all SourceBuffers.";
ReportError_Locked(DEMUXER_ERROR_COULD_NOT_OPEN);
return;
}
liveness_ = params.liveness;
}
// Wait until all streams have initialized.
if ((!source_id_audio_.empty() && !audio_) ||
(!source_id_video_.empty() && !video_)) {
return;
}
SeekAllSources(GetStartTime());
StartReturningData();
if (duration_ == kNoTimestamp())
duration_ = kInfiniteDuration();
// The demuxer is now initialized after the |start_timestamp_| was set.
ChangeState_Locked(INITIALIZED);
base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);
}
ChunkDemuxerStream*
ChunkDemuxer::CreateDemuxerStream(DemuxerStream::Type type) {
switch (type) {
case DemuxerStream::AUDIO:
if (audio_)
return NULL;
audio_.reset(
new ChunkDemuxerStream(DemuxerStream::AUDIO, splice_frames_enabled_));
return audio_.get();
break;
case DemuxerStream::VIDEO:
if (video_)
return NULL;
video_.reset(
new ChunkDemuxerStream(DemuxerStream::VIDEO, splice_frames_enabled_));
return video_.get();
break;
case DemuxerStream::TEXT: {
return new ChunkDemuxerStream(DemuxerStream::TEXT,
splice_frames_enabled_);
break;
}
case DemuxerStream::UNKNOWN:
case DemuxerStream::NUM_TYPES:
NOTREACHED();
return NULL;
}
NOTREACHED();
return NULL;
}
void ChunkDemuxer::OnNewTextTrack(ChunkDemuxerStream* text_stream,
const TextTrackConfig& config) {
lock_.AssertAcquired();
DCHECK_NE(state_, SHUTDOWN);
host_->AddTextStream(text_stream, config);
}
bool ChunkDemuxer::IsValidId(const std::string& source_id) const {
lock_.AssertAcquired();
return source_state_map_.count(source_id) > 0u;
}
void ChunkDemuxer::UpdateDuration(TimeDelta new_duration) {
DCHECK(duration_ != new_duration);
user_specified_duration_ = -1;
duration_ = new_duration;
host_->SetDuration(new_duration);
}
void ChunkDemuxer::IncreaseDurationIfNecessary(TimeDelta new_duration) {
DCHECK(new_duration != kNoTimestamp());
DCHECK(new_duration != kInfiniteDuration());
// Per April 1, 2014 MSE spec editor's draft:
// https://dvcs.w3.org/hg/html-media/raw-file/d471a4412040/media-source/
// media-source.html#sourcebuffer-coded-frame-processing
// 5. If the media segment contains data beyond the current duration, then run
// the duration change algorithm with new duration set to the maximum of
// the current duration and the group end timestamp.
if (new_duration <= duration_)
return;
DVLOG(2) << __FUNCTION__ << ": Increasing duration: "
<< duration_.InSecondsF() << " -> " << new_duration.InSecondsF();
UpdateDuration(new_duration);
}
void ChunkDemuxer::DecreaseDurationIfNecessary() {
lock_.AssertAcquired();
TimeDelta max_duration;
for (SourceStateMap::const_iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
max_duration = std::max(max_duration,
itr->second->GetMaxBufferedDuration());
}
if (max_duration == TimeDelta())
return;
if (max_duration < duration_)
UpdateDuration(max_duration);
}
Ranges<TimeDelta> ChunkDemuxer::GetBufferedRanges() const {
base::AutoLock auto_lock(lock_);
return GetBufferedRanges_Locked();
}
Ranges<TimeDelta> ChunkDemuxer::GetBufferedRanges_Locked() const {
lock_.AssertAcquired();
bool ended = state_ == ENDED;
// TODO(acolwell): When we start allowing SourceBuffers that are not active,
// we'll need to update this loop to only add ranges from active sources.
RangesList ranges_list;
for (SourceStateMap::const_iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
ranges_list.push_back(itr->second->GetBufferedRanges(duration_, ended));
}
return ComputeIntersection(ranges_list, ended);
}
void ChunkDemuxer::StartReturningData() {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->StartReturningData();
}
}
void ChunkDemuxer::AbortPendingReads() {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->AbortReads();
}
}
void ChunkDemuxer::SeekAllSources(TimeDelta seek_time) {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->Seek(seek_time);
}
}
void ChunkDemuxer::CompletePendingReadsIfPossible() {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->CompletePendingReadIfPossible();
}
}
void ChunkDemuxer::ShutdownAllStreams() {
for (SourceStateMap::iterator itr = source_state_map_.begin();
itr != source_state_map_.end(); ++itr) {
itr->second->Shutdown();
}
}
} // namespace media