diff options
Diffstat (limited to 'chromium/media/formats/webm/webm_stream_parser.h')
-rw-r--r-- | chromium/media/formats/webm/webm_stream_parser.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/chromium/media/formats/webm/webm_stream_parser.h b/chromium/media/formats/webm/webm_stream_parser.h new file mode 100644 index 00000000000..8a41f3744ca --- /dev/null +++ b/chromium/media/formats/webm/webm_stream_parser.h @@ -0,0 +1,89 @@ +// Copyright 2014 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. + +#ifndef MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ +#define MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ + +#include "base/callback_forward.h" +#include "base/memory/ref_counted.h" +#include "media/base/audio_decoder_config.h" +#include "media/base/buffers.h" +#include "media/base/byte_queue.h" +#include "media/base/stream_parser.h" +#include "media/base/video_decoder_config.h" + +namespace media { + +class WebMClusterParser; + +class WebMStreamParser : public StreamParser { + public: + WebMStreamParser(); + virtual ~WebMStreamParser(); + + // StreamParser implementation. + virtual void Init(const InitCB& init_cb, const NewConfigCB& config_cb, + const NewBuffersCB& new_buffers_cb, + bool ignore_text_tracks, + const NeedKeyCB& need_key_cb, + const NewMediaSegmentCB& new_segment_cb, + const base::Closure& end_of_segment_cb, + const LogCB& log_cb) OVERRIDE; + virtual void Flush() OVERRIDE; + virtual bool Parse(const uint8* buf, int size) OVERRIDE; + + private: + enum State { + kWaitingForInit, + kParsingHeaders, + kParsingClusters, + kError + }; + + void ChangeState(State new_state); + + // Parses WebM Header, Info, Tracks elements. It also skips other level 1 + // elements that are not used right now. Once the Info & Tracks elements have + // been parsed, this method will transition the parser from PARSING_HEADERS to + // PARSING_CLUSTERS. + // + // Returns < 0 if the parse fails. + // Returns 0 if more data is needed. + // Returning > 0 indicates success & the number of bytes parsed. + int ParseInfoAndTracks(const uint8* data, int size); + + // Incrementally parses WebM cluster elements. This method also skips + // CUES elements if they are encountered since we currently don't use the + // data in these elements. + // + // Returns < 0 if the parse fails. + // Returns 0 if more data is needed. + // Returning > 0 indicates success & the number of bytes parsed. + int ParseCluster(const uint8* data, int size); + + // Fire needkey event through the |need_key_cb_|. + void FireNeedKey(const std::string& key_id); + + State state_; + InitCB init_cb_; + NewConfigCB config_cb_; + NewBuffersCB new_buffers_cb_; + bool ignore_text_tracks_; + NeedKeyCB need_key_cb_; + + NewMediaSegmentCB new_segment_cb_; + base::Closure end_of_segment_cb_; + LogCB log_cb_; + + bool unknown_segment_size_; + + scoped_ptr<WebMClusterParser> cluster_parser_; + ByteQueue byte_queue_; + + DISALLOW_COPY_AND_ASSIGN(WebMStreamParser); +}; + +} // namespace media + +#endif // MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ |