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104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef AbstractMediaDecoder_h_
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#define AbstractMediaDecoder_h_
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#include "nsISupports.h"
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namespace mozilla
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{
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namespace layers
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{
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class ImageContainer;
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}
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class MediaResource;
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class ReentrantMonitor;
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class VideoFrameContainer;
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/**
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* The AbstractMediaDecoder class describes the public interface for a media decoder
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* and is used by the MediaReader classes.
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*/
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class AbstractMediaDecoder : public nsISupports
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{
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public:
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// Returns the monitor for other threads to synchronise access to
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// state.
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virtual ReentrantMonitor& GetReentrantMonitor() = 0;
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// Returns true if the decoder is shut down.
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virtual bool IsShutdown() const = 0;
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virtual bool OnStateMachineThread() const = 0;
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virtual bool OnDecodeThread() const = 0;
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// Get the current MediaResource being used. Its URI will be returned
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// by currentSrc. Returns what was passed to Load(), if Load() has been called.
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virtual MediaResource* GetResource() const = 0;
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// Called by the decode thread to keep track of the number of bytes read
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// from the resource.
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virtual void NotifyBytesConsumed(int64_t aBytes) = 0;
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// Increments the parsed and decoded frame counters by the passed in counts.
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// Can be called on any thread.
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virtual void NotifyDecodedFrames(uint32_t aParsed, uint32_t aDecoded) = 0;
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// Returns the end time of the last sample in the media. Note that a media
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// can have a non-zero start time, so the end time may not necessarily be
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// the same as the duration (i.e. duration is (end_time - start_time)).
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virtual int64_t GetEndMediaTime() const = 0;
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// Return the duration of the media in microseconds.
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virtual int64_t GetMediaDuration() = 0;
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// Set the duration of the media in microseconds.
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virtual void SetMediaDuration(int64_t aDuration) = 0;
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virtual VideoFrameContainer* GetVideoFrameContainer() = 0;
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virtual mozilla::layers::ImageContainer* GetImageContainer() = 0;
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// Return true if seeking is supported.
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virtual bool IsMediaSeekable() = 0;
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// Set the media end time in microseconds
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virtual void SetMediaEndTime(int64_t aTime) = 0;
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// Make the decoder state machine update the playback position. Called by
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// the reader on the decoder thread (Assertions for this checked by
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// mDecoderStateMachine). This must be called with the decode monitor
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// held.
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virtual void UpdatePlaybackPosition(int64_t aTime) = 0;
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// Called when the metadata from the media file has been read by the reader.
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// Call on the decode thread only.
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virtual void OnReadMetadataCompleted() = 0;
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// Stack based class to assist in notifying the frame statistics of
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// parsed and decoded frames. Use inside video demux & decode functions
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// to ensure all parsed and decoded frames are reported on all return paths.
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class AutoNotifyDecoded {
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public:
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AutoNotifyDecoded(AbstractMediaDecoder* aDecoder, uint32_t& aParsed, uint32_t& aDecoded)
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: mDecoder(aDecoder), mParsed(aParsed), mDecoded(aDecoded) {}
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~AutoNotifyDecoded() {
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mDecoder->NotifyDecodedFrames(mParsed, mDecoded);
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}
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private:
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AbstractMediaDecoder* mDecoder;
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uint32_t& mParsed;
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uint32_t& mDecoded;
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};
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};
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}
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#endif
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