82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MEDIA_BASE_DEMUXER_H_
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#define MEDIA_BASE_DEMUXER_H_
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#include <vector>
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#include "base/memory/ref_counted.h"
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#include "base/memory/scoped_ptr.h"
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#include "media/base/container_names.h"
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#include "media/base/status.h"
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namespace media {
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class Decryptor;
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class DecryptorSource;
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class File;
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class MediaParser;
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class MediaSample;
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class MediaStream;
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class StreamInfo;
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/// Demuxer is responsible for extracting elementary stream samples from a
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/// media file, e.g. an ISO BMFF file.
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class Demuxer {
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public:
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/// @param file_name specifies the input source. It uses prefix matching to
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/// create a proper File object. The user can extend File to support
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/// a custom File object with its own prefix.
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/// @param decryptor_source generates decryptor(s) from decryption
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/// initialization data. It can be NULL if the media is not encrypted.
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Demuxer(const std::string& file_name, DecryptorSource* decryptor_source);
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~Demuxer();
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/// Initialize the Demuxer. Calling other public methods of this class
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/// without this method returning OK, results in an undefined behavior.
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/// This method primes the demuxer by parsing portions of the media file to
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/// extract stream information.
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/// @return OK on success.
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Status Initialize();
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/// Drive the remuxing from demuxer side (push). Read the file and push
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/// the Data to Muxer until Eof.
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Status Run();
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/// Read from the source and send it to the parser.
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Status Parse();
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/// @return Streams in the media container being demuxed. The caller cannot
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/// add or remove streams from the returned vector, but the caller is
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/// allowed to change the internal state of the streams in the vector
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/// through MediaStream APIs.
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const std::vector<MediaStream*>& streams() { return streams_; }
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private:
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// Parser event handlers.
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void ParserInitEvent(const std::vector<scoped_refptr<StreamInfo> >& streams);
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bool NewSampleEvent(uint32 track_id,
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const scoped_refptr<MediaSample>& sample);
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void KeyNeededEvent(MediaContainerName container,
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scoped_ptr<uint8[]> init_data,
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int init_data_size);
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DecryptorSource* decryptor_source_;
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std::string file_name_;
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File* media_file_;
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bool init_event_received_;
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scoped_ptr<MediaParser> parser_;
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std::vector<MediaStream*> streams_;
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scoped_ptr<uint8[]> buffer_;
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DISALLOW_COPY_AND_ASSIGN(Demuxer);
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};
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} // namespace media
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#endif // MEDIA_BASE_DEMUXER_H_
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