| // 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/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/timestamp_constants.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. |
| // TODO: SourceState needs to be moved to a separate file and covered with unit |
| // tests (see crbug.com/525836) |
| class SourceState { |
| public: |
| // Callback signature used to create ChunkDemuxerStreams. |
| typedef base::Callback<ChunkDemuxerStream*( |
| DemuxerStream::Type)> CreateDemuxerStreamCB; |
| |
| typedef ChunkDemuxer::InitSegmentReceivedCB InitSegmentReceivedCB; |
| |
| typedef base::Callback<void( |
| ChunkDemuxerStream*, const TextTrackConfig&)> NewTextTrackCB; |
| |
| SourceState(scoped_ptr<StreamParser> stream_parser, |
| scoped_ptr<FrameProcessor> frame_processor, |
| const CreateDemuxerStreamCB& create_demuxer_stream_cb, |
| const scoped_refptr<MediaLog>& media_log); |
| |
| ~SourceState(); |
| |
| void Init(const StreamParser::InitCB& init_cb, |
| bool allow_audio, |
| bool allow_video, |
| const StreamParser::EncryptedMediaInitDataCB& |
| encrypted_media_init_data_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. |init_segment_received_cb| is run for each new fully |
| // parsed initialization segment. |
| bool Append(const uint8* data, |
| size_t length, |
| TimeDelta append_window_start, |
| TimeDelta append_window_end, |
| TimeDelta* timestamp_offset, |
| const InitSegmentReceivedCB& init_segment_received_cb); |
| |
| // Aborts the current append sequence and resets the parser. |
| void ResetParserState(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); |
| |
| // If the buffer is full, attempts to try to free up space, as specified in |
| // the "Coded Frame Eviction Algorithm" in the Media Source Extensions Spec. |
| // Returns false iff buffer is still full after running eviction. |
| // https://w3c.github.io/media-source/#sourcebuffer-coded-frame-eviction |
| bool EvictCodedFrames(DecodeTimestamp media_time, size_t newDataSize); |
| |
| // 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 of a specific type. |
| // |memory_limit| is the maximum number of bytes each stream of type |type| |
| // is allowed to hold in its buffer. |
| void SetMemoryLimits(DemuxerStream::Type type, size_t 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(const StreamParser::InitParameters& params); |
| |
| // EstimateVideoDataSize uses some heuristics to estimate the size of the |
| // video size in the chunk of muxed audio/video data without parsing it. |
| // This is used by EvictCodedFrames algorithm, which happens before Append |
| // (and therefore before parsing is performed) to prepare space for new data. |
| size_t EstimateVideoDataSize(size_t muxed_data_chunk_size) const; |
| |
| 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_; |
| scoped_refptr<MediaLog> media_log_; |
| StreamParser::InitCB init_cb_; |
| |
| // During Append(), OnNewConfigs() will trigger the initialization segment |
| // received algorithm. This callback is only non-NULL during the lifetime of |
| // an Append() call. Note, the MSE spec explicitly disallows this algorithm |
| // during an Abort(), since Abort() is allowed only to emit coded frames, and |
| // only if the parser is PARSING_MEDIA_SEGMENT (not an INIT segment). |
| InitSegmentReceivedCB init_segment_received_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 CreateDemuxerStreamCB& create_demuxer_stream_cb, |
| const scoped_refptr<MediaLog>& media_log) |
| : 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()), |
| media_log_(media_log), |
| 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::EncryptedMediaInitDataCB& encrypted_media_init_data_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(), encrypted_media_init_data_cb, |
| base::Bind(&SourceState::OnNewMediaSegment, base::Unretained(this)), |
| base::Bind(&SourceState::OnEndOfMediaSegment, base::Unretained(this)), |
| media_log_); |
| } |
| |
| 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, |
| const InitSegmentReceivedCB& init_segment_received_cb) { |
| DCHECK(timestamp_offset); |
| DCHECK(!timestamp_offset_during_append_); |
| DCHECK(!init_segment_received_cb.is_null()); |
| DCHECK(init_segment_received_cb_.is_null()); |
| append_window_start_during_append_ = append_window_start; |
| append_window_end_during_append_ = append_window_end; |
| timestamp_offset_during_append_ = timestamp_offset; |
| init_segment_received_cb_= init_segment_received_cb; |
| |
| // 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_) |
| << __FUNCTION__ << ": 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; |
| init_segment_received_cb_.Reset(); |
| return result; |
| } |
| |
| void SourceState::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; |
| } |
| |
| 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); |
| } |
| } |
| |
| size_t SourceState::EstimateVideoDataSize(size_t muxed_data_chunk_size) const { |
| DCHECK(audio_); |
| DCHECK(video_); |
| |
| size_t videoBufferedSize = video_->GetBufferedSize(); |
| size_t audioBufferedSize = audio_->GetBufferedSize(); |
| if (videoBufferedSize == 0 || audioBufferedSize == 0) { |
| // At this point either audio or video buffer is empty, which means buffer |
| // levels are probably low anyway and we should have enough space in the |
| // buffers for appending new data, so just take a very rough guess. |
| return muxed_data_chunk_size / 2; |
| } |
| |
| // We need to estimate how much audio and video data is going to be in the |
| // newly appended data chunk to make space for the new data. And we need to do |
| // that without parsing the data (which will happen later, in the Append |
| // phase). So for now we can only rely on some heuristic here. Let's assume |
| // that the proportion of the audio/video in the new data chunk is the same as |
| // the current ratio of buffered audio/video. |
| // Longer term this should go away once we further change the MSE GC algorithm |
| // to work across all streams of a SourceBuffer (see crbug.com/520704). |
| double videoBufferedSizeF = static_cast<double>(videoBufferedSize); |
| double audioBufferedSizeF = static_cast<double>(audioBufferedSize); |
| |
| double totalBufferedSizeF = videoBufferedSizeF + audioBufferedSizeF; |
| CHECK_GT(totalBufferedSizeF, 0.0); |
| |
| double videoRatio = videoBufferedSizeF / totalBufferedSizeF; |
| CHECK_GE(videoRatio, 0.0); |
| CHECK_LE(videoRatio, 1.0); |
| double estimatedVideoSize = muxed_data_chunk_size * videoRatio; |
| return static_cast<size_t>(estimatedVideoSize); |
| } |
| |
| bool SourceState::EvictCodedFrames(DecodeTimestamp media_time, |
| size_t newDataSize) { |
| bool success = true; |
| |
| DVLOG(3) << __FUNCTION__ << " media_time=" << media_time.InSecondsF() |
| << " newDataSize=" << newDataSize |
| << " videoBufferedSize=" << (video_ ? video_->GetBufferedSize() : 0) |
| << " audioBufferedSize=" << (audio_ ? audio_->GetBufferedSize() : 0); |
| |
| size_t newAudioSize = 0; |
| size_t newVideoSize = 0; |
| if (audio_ && video_) { |
| newVideoSize = EstimateVideoDataSize(newDataSize); |
| newAudioSize = newDataSize - newVideoSize; |
| } else if (video_) { |
| newVideoSize = newDataSize; |
| } else if (audio_) { |
| newAudioSize = newDataSize; |
| } |
| |
| DVLOG(3) << __FUNCTION__ << " estimated audio/video sizes: " |
| << " newVideoSize=" << newVideoSize |
| << " newAudioSize=" << newAudioSize; |
| |
| if (audio_) |
| success = audio_->EvictCodedFrames(media_time, newAudioSize) && success; |
| |
| if (video_) |
| success = video_->EvictCodedFrames(media_time, newVideoSize) && success; |
| |
| for (TextStreamMap::iterator itr = text_stream_map_.begin(); |
| itr != text_stream_map_.end(); ++itr) { |
| success = itr->second->EvictCodedFrames(media_time, 0) && success; |
| } |
| |
| DVLOG(3) << __FUNCTION__ << " result=" << success |
| << " videoBufferedSize=" << (video_ ? video_->GetBufferedSize() : 0) |
| << " audioBufferedSize=" << (audio_ ? audio_->GetBufferedSize() : 0); |
| |
| return success; |
| } |
| |
| 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::SetMemoryLimits(DemuxerStream::Type type, |
| size_t memory_limit) { |
| switch (type) { |
| case DemuxerStream::AUDIO: |
| if (audio_) |
| audio_->SetStreamMemoryLimit(memory_limit); |
| break; |
| case DemuxerStream::VIDEO: |
| if (video_) |
| video_->SetStreamMemoryLimit(memory_limit); |
| break; |
| case DemuxerStream::TEXT: |
| for (TextStreamMap::iterator itr = text_stream_map_.begin(); |
| itr != text_stream_map_.end(); ++itr) { |
| itr->second->SetStreamMemoryLimit(memory_limit); |
| } |
| break; |
| case DemuxerStream::UNKNOWN: |
| case DemuxerStream::NUM_TYPES: |
| NOTREACHED(); |
| break; |
| } |
| } |
| |
| 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() << ")"; |
| DCHECK(!init_segment_received_cb_.is_null()); |
| |
| 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(ERROR, media_log_) |
| << "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(ERROR, media_log_) |
| << "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_) { |
| media_log_->SetBooleanProperty("found_audio_stream", true); |
| } |
| if (!audio_ || |
| audio_->audio_decoder_config().codec() != audio_config.codec()) { |
| media_log_->SetStringProperty("audio_codec_name", |
| audio_config.GetHumanReadableCodecName()); |
| } |
| |
| 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(FrameProcessor::kAudioTrackId, audio_)) { |
| DVLOG(1) << "Failed to add audio track to frame processor."; |
| return false; |
| } |
| } |
| |
| frame_processor_->OnPossibleAudioConfigUpdate(audio_config); |
| success &= audio_->UpdateAudioConfig(audio_config, media_log_); |
| } |
| |
| if (video_config.IsValidConfig()) { |
| if (!video_) { |
| media_log_->SetBooleanProperty("found_video_stream", true); |
| } |
| if (!video_ || |
| video_->video_decoder_config().codec() != video_config.codec()) { |
| media_log_->SetStringProperty("video_codec_name", |
| video_config.GetHumanReadableCodecName()); |
| } |
| |
| 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(FrameProcessor::kVideoTrackId, video_)) { |
| DVLOG(1) << "Failed to add video track to frame processor."; |
| return false; |
| } |
| } |
| |
| success &= video_->UpdateVideoConfig(video_config, media_log_); |
| } |
| |
| 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(ERROR, media_log_) << "Failed to add text track ID " |
| << itr->first << " to frame processor."; |
| break; |
| } |
| text_stream->UpdateTextConfig(itr->second, media_log_); |
| 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(ERROR, media_log_) |
| << "The number of text track configs changed."; |
| } else if (text_count == 1) { |
| TextConfigItr config_itr = text_configs.begin(); |
| TextStreamMap::iterator stream_itr = text_stream_map_.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) { |
| 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(ERROR, media_log_) |
| << "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(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; |
| } |
| } |
| } |
| } |
| |
| frame_processor_->SetAllTrackBuffersNeedRandomAccessPoint(); |
| |
| DVLOG(1) << "OnNewConfigs() : " << (success ? "success" : "failed"); |
| if (success) |
| init_segment_received_cb_.Run(); |
| |
| 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(const StreamParser::InitParameters& params) { |
| auto_update_timestamp_offset_ = params.auto_update_timestamp_offset; |
| base::ResetAndReturn(&init_cb_).Run(params); |
| } |
| |
| ChunkDemuxerStream::ChunkDemuxerStream(Type type, |
| bool splice_frames_enabled) |
| : type_(type), |
| liveness_(DemuxerStream::LIVENESS_UNKNOWN), |
| 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); |
| } |
| |
| bool ChunkDemuxerStream::EvictCodedFrames(DecodeTimestamp media_time, |
| size_t newDataSize) { |
| base::AutoLock auto_lock(lock_); |
| return stream_->GarbageCollectIfNeeded(media_time, newDataSize); |
| } |
| |
| 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(); |
| } |
| |
| size_t ChunkDemuxerStream::GetBufferedSize() const { |
| return stream_->GetBufferedSize(); |
| } |
| |
| void ChunkDemuxerStream::OnNewMediaSegment(DecodeTimestamp 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 scoped_refptr<MediaLog>& media_log) { |
| 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, media_log, splice_frames_enabled_)); |
| return true; |
| } |
| |
| return stream_->UpdateAudioConfig(config); |
| } |
| |
| bool ChunkDemuxerStream::UpdateVideoConfig( |
| const VideoDecoderConfig& config, |
| const scoped_refptr<MediaLog>& media_log) { |
| DCHECK(config.IsValidConfig()); |
| DCHECK_EQ(type_, VIDEO); |
| base::AutoLock auto_lock(lock_); |
| |
| if (!stream_) { |
| DCHECK_EQ(state_, UNINITIALIZED); |
| stream_.reset( |
| new SourceBufferStream(config, media_log, splice_frames_enabled_)); |
| return true; |
| } |
| |
| return stream_->UpdateVideoConfig(config); |
| } |
| |
| void ChunkDemuxerStream::UpdateTextConfig( |
| const TextTrackConfig& config, |
| const scoped_refptr<MediaLog>& media_log) { |
| DCHECK_EQ(type_, TEXT); |
| base::AutoLock auto_lock(lock_); |
| DCHECK(!stream_); |
| DCHECK_EQ(state_, UNINITIALIZED); |
| stream_.reset( |
| new SourceBufferStream(config, media_log, 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() const { return type_; } |
| |
| DemuxerStream::Liveness ChunkDemuxerStream::liveness() const { |
| base::AutoLock auto_lock(lock_); |
| return liveness_; |
| } |
| |
| 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; } |
| |
| VideoRotation ChunkDemuxerStream::video_rotation() { |
| return VIDEO_ROTATION_0; |
| } |
| |
| TextTrackConfig ChunkDemuxerStream::text_track_config() { |
| CHECK_EQ(type_, TEXT); |
| base::AutoLock auto_lock(lock_); |
| return stream_->GetCurrentTextTrackConfig(); |
| } |
| |
| void ChunkDemuxerStream::SetStreamMemoryLimit(size_t memory_limit) { |
| stream_->set_memory_limit(memory_limit); |
| } |
| |
| void ChunkDemuxerStream::SetLiveness(Liveness liveness) { |
| base::AutoLock auto_lock(lock_); |
| liveness_ = liveness; |
| } |
| |
| 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; |
| DVLOG(2) << __FUNCTION__ << ": returning kOk, type " << type_ |
| << ", dts " << buffer->GetDecodeTimestamp().InSecondsF() |
| << ", pts " << buffer->timestamp().InSecondsF() |
| << ", dur " << buffer->duration().InSecondsF() |
| << ", key " << buffer->is_key_frame(); |
| break; |
| case SourceBufferStream::kNeedBuffer: |
| // Return early without calling |read_cb_| since we don't have |
| // any data to return yet. |
| DVLOG(2) << __FUNCTION__ << ": returning kNeedBuffer, type " |
| << type_; |
| return; |
| case SourceBufferStream::kEndOfStream: |
| status = DemuxerStream::kOk; |
| buffer = StreamParserBuffer::CreateEOSBuffer(); |
| DVLOG(2) << __FUNCTION__ << ": returning kOk with EOS buffer, type " |
| << type_; |
| break; |
| case SourceBufferStream::kConfigChange: |
| status = kConfigChanged; |
| buffer = NULL; |
| DVLOG(2) << __FUNCTION__ << ": returning kConfigChange, type " |
| << type_; |
| 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; |
| DVLOG(2) << __FUNCTION__ << ": returning kAborted, type " << type_; |
| break; |
| case SHUTDOWN: |
| status = DemuxerStream::kOk; |
| buffer = StreamParserBuffer::CreateEOSBuffer(); |
| DVLOG(2) << __FUNCTION__ << ": returning kOk with EOS buffer, type " |
| << type_; |
| break; |
| } |
| |
| base::ResetAndReturn(&read_cb_).Run(status, buffer); |
| } |
| |
| ChunkDemuxer::ChunkDemuxer( |
| const base::Closure& open_cb, |
| const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, |
| const scoped_refptr<MediaLog>& media_log, |
| bool splice_frames_enabled) |
| : state_(WAITING_FOR_INIT), |
| cancel_next_seek_(false), |
| host_(NULL), |
| open_cb_(open_cb), |
| encrypted_media_init_data_cb_(encrypted_media_init_data_cb), |
| enable_text_(false), |
| media_log_(media_log), |
| duration_(kNoTimestamp()), |
| user_specified_duration_(-1), |
| liveness_(DemuxerStream::LIVENESS_UNKNOWN), |
| splice_frames_enabled_(splice_frames_enabled) { |
| DCHECK(!open_cb_.is_null()); |
| DCHECK(!encrypted_media_init_data_cb_.is_null()); |
| } |
| |
| std::string ChunkDemuxer::GetDisplayName() const { |
| return "ChunkDemuxer"; |
| } |
| |
| void ChunkDemuxer::Initialize( |
| DemuxerHost* host, |
| const PipelineStatusCB& cb, |
| bool enable_text_tracks) { |
| DVLOG(1) << "Init()"; |
| |
| base::AutoLock auto_lock(lock_); |
| |
| // The |init_cb_| must only be run after this method returns, so always post. |
| 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() { |
| DVLOG(1) << "Stop()"; |
| Shutdown(); |
| } |
| |
| 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. |
| base::Time ChunkDemuxer::GetTimelineOffset() const { |
| return timeline_offset_; |
| } |
| |
| 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(); |
| } |
| |
| 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, media_log_, &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)), |
| media_log_)); |
| |
| scoped_ptr<SourceState> source_state(new SourceState( |
| stream_parser.Pass(), frame_processor.Pass(), |
| base::Bind(&ChunkDemuxer::CreateDemuxerStream, base::Unretained(this)), |
| media_log_)); |
| |
| 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, encrypted_media_init_data_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); |
| } |
| |
| bool ChunkDemuxer::EvictCodedFrames(const std::string& id, |
| base::TimeDelta currentMediaTime, |
| size_t newDataSize) { |
| DVLOG(1) << __FUNCTION__ << "(" << id << ")" |
| << " media_time=" << currentMediaTime.InSecondsF() |
| << " newDataSize=" << newDataSize; |
| base::AutoLock auto_lock(lock_); |
| |
| // Note: The direct conversion from PTS to DTS is safe here, since we don't |
| // need to know currentTime precisely for GC. GC only needs to know which GOP |
| // currentTime points to. |
| DecodeTimestamp media_time_dts = |
| DecodeTimestamp::FromPresentationTime(currentMediaTime); |
| |
| DCHECK(!id.empty()); |
| SourceStateMap::const_iterator itr = source_state_map_.find(id); |
| if (itr == source_state_map_.end()) { |
| LOG(WARNING) << __FUNCTION__ << " stream " << id << " not found"; |
| return false; |
| } |
| return itr->second->EvictCodedFrames(media_time_dts, newDataSize); |
| } |
| |
| void ChunkDemuxer::AppendData( |
| const std::string& id, |
| const uint8* data, |
| size_t length, |
| TimeDelta append_window_start, |
| TimeDelta append_window_end, |
| TimeDelta* timestamp_offset, |
| const InitSegmentReceivedCB& init_segment_received_cb) { |
| DVLOG(1) << "AppendData(" << id << ", " << length << ")"; |
| |
| DCHECK(!id.empty()); |
| DCHECK(timestamp_offset); |
| DCHECK(!init_segment_received_cb.is_null()); |
| |
| 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: |
| case INITIALIZED: |
| DCHECK(IsValidId(id)); |
| if (!source_state_map_[id]->Append(data, length, |
| append_window_start, |
| append_window_end, |
| timestamp_offset, |
| init_segment_received_cb)) { |
| 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::ResetParserState(const std::string& id, |
| TimeDelta append_window_start, |
| TimeDelta append_window_end, |
| TimeDelta* timestamp_offset) { |
| DVLOG(1) << "ResetParserState(" << id << ")"; |
| base::AutoLock auto_lock(lock_); |
| DCHECK(!id.empty()); |
| CHECK(IsValidId(id)); |
| bool old_waiting_for_data = IsSeekWaitingForData_Locked(); |
| source_state_map_[id]->ResetParserState(append_window_start, |
| append_window_end, |
| timestamp_offset); |
| // ResetParserState can possibly emit some buffers. |
| // Need to check whether seeking can be completed. |
| if (old_waiting_for_data && !IsSeekWaitingForData_Locked() && |
| !seek_cb_.is_null()) { |
| base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK); |
| } |
| } |
| |
| 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::SetMemoryLimits(DemuxerStream::Type type, |
| size_t memory_limit) { |
| for (SourceStateMap::iterator itr = source_state_map_.begin(); |
| itr != source_state_map_.end(); ++itr) { |
| itr->second->SetMemoryLimits(type, 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( |
| const StreamParser::InitParameters& params) { |
| DVLOG(1) << "OnSourceInitDone(" << params.duration.InSecondsF() << ")"; |
| lock_.AssertAcquired(); |
| DCHECK_EQ(state_, INITIALIZING); |
| if (!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(ERROR, media_log_) |
| << "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 != DemuxerStream::LIVENESS_UNKNOWN) { |
| if (audio_) |
| audio_->SetLiveness(params.liveness); |
| if (video_) |
| video_->SetLiveness(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 |