76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
// Copyright 2015 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_FORMATS_WEBM_MKV_WRITER_H_
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#define MEDIA_FORMATS_WEBM_MKV_WRITER_H_
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#include <string>
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#include "packager/base/memory/scoped_ptr.h"
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#include "packager/media/base/status.h"
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#include "packager/media/file/file_closer.h"
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#include "packager/third_party/libwebm/src/mkvmuxer.hpp"
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namespace shaka {
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namespace media {
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/// An implementation of IMkvWriter using our File type.
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class MkvWriter : public mkvmuxer::IMkvWriter {
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public:
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MkvWriter();
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~MkvWriter() override;
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/// Opens the given file for writing. This MUST be called before any other
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/// calls.
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/// @param name The path to the file to open.
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/// @return Whether the operation succeeded.
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Status Open(const std::string& name);
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/// Closes the file. MUST call Open before calling any other methods.
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Status Close();
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/// Writes out @a len bytes of @a buf.
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/// @return 0 on success.
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mkvmuxer::int32 Write(const void* buf, mkvmuxer::uint32 len) override;
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/// @return The offset of the output position from the beginning of the
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/// output.
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mkvmuxer::int64 Position() const override;
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/// Set the current File position.
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/// @return 0 on success.
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mkvmuxer::int32 Position(mkvmuxer::int64 position) override;
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/// @return true if the writer is seekable.
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bool Seekable() const override;
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/// Element start notification. Called whenever an element identifier is about
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/// to be written to the stream. @a element_id is the element identifier, and
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/// @a position is the location in the WebM stream where the first octet of
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/// the element identifier will be written.
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/// Note: the |MkvId| enumeration in webmids.hpp defines element values.
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void ElementStartNotify(mkvmuxer::uint64 element_id,
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mkvmuxer::int64 position) override;
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/// Writes the contents of the given file to this file.
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/// @return The number of bytes written; or < 0 on error.
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int64_t WriteFromFile(File* source);
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/// Writes the contents of the given file to this file, up to a maximum
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/// number of bytes. If @a max_copy is negative, will copy to EOF.
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/// @return The number of bytes written; or < 0 on error.
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int64_t WriteFromFile(File* source, uint64_t max_copy);
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File* file() { return file_.get(); }
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private:
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scoped_ptr<File, FileCloser> file_;
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// Keep track of the position and whether we can seek.
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mkvmuxer::int64 position_;
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bool seekable_;
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DISALLOW_COPY_AND_ASSIGN(MkvWriter);
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};
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} // namespace media
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} // namespace shaka
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#endif // MEDIA_FORMATS_WEBM_MKV_WRITER_H_
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