зеркало из https://github.com/mozilla/gecko-dev.git
76 строки
2.6 KiB
C++
76 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef ContainerWriter_h_
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#define ContainerWriter_h_
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#include "nsTArray.h"
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#include "EncodedFrame.h"
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#include "TrackMetadataBase.h"
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namespace mozilla {
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/**
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* ContainerWriter packs encoded track data into a specific media container.
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*/
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class ContainerWriter {
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public:
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ContainerWriter() : mInitialized(false), mIsWritingComplete(false) {}
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virtual ~ContainerWriter() {}
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// Mapping to DOMMediaStream::TrackTypeHints
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enum {
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CREATE_AUDIO_TRACK = 1 << 0,
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CREATE_VIDEO_TRACK = 1 << 1,
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};
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enum { END_OF_STREAM = 1 << 0 };
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/**
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* Writes encoded track data from aData into the internal stream of container
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* writer. aFlags is used to signal the impl of different conditions
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* such as END_OF_STREAM. Each impl may handle different flags, and should be
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* documented accordingly. Currently, WriteEncodedTrack doesn't support
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* explicit track specification, though each impl may provide logic to
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* allocate frames into different tracks.
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*/
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virtual nsresult WriteEncodedTrack(
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const nsTArray<RefPtr<EncodedFrame>>& aData, uint32_t aFlags = 0) = 0;
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/**
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* Stores the metadata for all given tracks to the muxer.
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*
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* This method checks the integrity of aMetadata.
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* If the metadata isn't well formatted, this method returns NS_ERROR_FAILURE.
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* If the metadata is well formatted, it stores the metadata and returns
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* NS_OK.
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*/
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virtual nsresult SetMetadata(
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const nsTArray<RefPtr<TrackMetadataBase>>& aMetadata) = 0;
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/**
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* Indicate if the writer has finished to output data
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*/
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virtual bool IsWritingComplete() { return mIsWritingComplete; }
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enum { FLUSH_NEEDED = 1 << 0, GET_HEADER = 1 << 1 };
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/**
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* Copies the final container data to a buffer if it has accumulated enough
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* packets from WriteEncodedTrack. This buffer of data is appended to
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* aOutputBufs, and existing elements of aOutputBufs should not be modified.
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* aFlags is true with FLUSH_NEEDED will force OggWriter to flush an ogg page
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* even it is not full, and copy these container data to a buffer for
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* aOutputBufs to append.
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*/
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virtual nsresult GetContainerData(nsTArray<nsTArray<uint8_t>>* aOutputBufs,
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uint32_t aFlags = 0) = 0;
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protected:
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bool mInitialized;
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bool mIsWritingComplete;
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};
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} // namespace mozilla
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#endif
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