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