mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
bf27fe5198
--HG-- extra : rebase_source : 5e58af70c75f563ae7dd7d62e3be897a3c244e85
240 lines
8.1 KiB
C++
240 lines
8.1 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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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is the Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Double <chris.double@double.co.nz>
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* Chris Pearce <chris@pearce.org.nz>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#if !defined(nsWebMReader_h_)
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#define nsWebMReader_h_
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#include "nsDeque.h"
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#include "nsBuiltinDecoderReader.h"
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#include "nsWebMBufferedParser.h"
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#include "nsAutoRef.h"
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#include "nestegg/nestegg.h"
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#include "vpx/vpx_decoder.h"
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#include "vpx/vp8dx.h"
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#ifdef MOZ_TREMOR
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#include "tremor/ivorbiscodec.h"
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#else
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#include "vorbis/codec.h"
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#endif
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class nsMediaDecoder;
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// Holds a nestegg_packet, and its file offset. This is needed so we
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// know the offset in the file we've played up to, in order to calculate
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// whether it's likely we can play through to the end without needing
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// to stop to buffer, given the current download rate.
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class NesteggPacketHolder {
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public:
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NesteggPacketHolder(nestegg_packet* aPacket, PRInt64 aOffset)
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: mPacket(aPacket), mOffset(aOffset)
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{
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MOZ_COUNT_CTOR(NesteggPacketHolder);
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}
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~NesteggPacketHolder() {
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MOZ_COUNT_DTOR(NesteggPacketHolder);
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nestegg_free_packet(mPacket);
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}
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nestegg_packet* mPacket;
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// Offset in bytes. This is the offset of the end of the Block
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// which contains the packet.
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PRInt64 mOffset;
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private:
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// Copy constructor and assignment operator not implemented. Don't use them!
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NesteggPacketHolder(const NesteggPacketHolder &aOther);
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NesteggPacketHolder& operator= (NesteggPacketHolder const& aOther);
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};
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// Thread and type safe wrapper around nsDeque.
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class PacketQueueDeallocator : public nsDequeFunctor {
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virtual void* operator() (void* anObject) {
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delete static_cast<NesteggPacketHolder*>(anObject);
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return nsnull;
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}
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};
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// Typesafe queue for holding nestegg packets. It has
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// ownership of the items in the queue and will free them
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// when destroyed.
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class PacketQueue : private nsDeque {
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public:
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PacketQueue()
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: nsDeque(new PacketQueueDeallocator())
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{}
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~PacketQueue() {
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Reset();
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}
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inline PRInt32 GetSize() {
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return nsDeque::GetSize();
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}
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inline void Push(NesteggPacketHolder* aItem) {
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NS_ASSERTION(aItem, "NULL pushed to PacketQueue");
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nsDeque::Push(aItem);
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}
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inline void PushFront(NesteggPacketHolder* aItem) {
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NS_ASSERTION(aItem, "NULL pushed to PacketQueue");
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nsDeque::PushFront(aItem);
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}
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inline NesteggPacketHolder* PopFront() {
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return static_cast<NesteggPacketHolder*>(nsDeque::PopFront());
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}
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void Reset() {
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while (GetSize() > 0) {
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delete PopFront();
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}
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}
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};
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class nsWebMReader : public nsBuiltinDecoderReader
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{
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public:
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nsWebMReader(nsBuiltinDecoder* aDecoder);
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~nsWebMReader();
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virtual nsresult Init(nsBuiltinDecoderReader* aCloneDonor);
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virtual nsresult ResetDecode();
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virtual PRBool DecodeAudioData();
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// If the Theora granulepos has not been captured, it may read several packets
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// until one with a granulepos has been captured, to ensure that all packets
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// read have valid time info.
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virtual PRBool DecodeVideoFrame(PRBool &aKeyframeSkip,
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PRInt64 aTimeThreshold);
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virtual PRBool HasAudio()
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{
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mozilla::MonitorAutoEnter mon(mMonitor);
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return mHasAudio;
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}
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virtual PRBool HasVideo()
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{
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mozilla::MonitorAutoEnter mon(mMonitor);
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return mHasVideo;
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}
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virtual nsresult ReadMetadata(nsVideoInfo* aInfo);
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virtual nsresult Seek(PRInt64 aTime, PRInt64 aStartTime, PRInt64 aEndTime, PRInt64 aCurrentTime);
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virtual nsresult GetBuffered(nsTimeRanges* aBuffered, PRInt64 aStartTime);
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virtual void NotifyDataArrived(const char* aBuffer, PRUint32 aLength, PRUint32 aOffset);
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private:
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// Value passed to NextPacket to determine if we are reading a video or an
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// audio packet.
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enum TrackType {
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VIDEO = 0,
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AUDIO = 1
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};
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// Read a packet from the nestegg file. Returns NULL if all packets for
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// the particular track have been read. Pass VIDEO or AUDIO to indicate the
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// type of the packet we want to read.
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nsReturnRef<NesteggPacketHolder> NextPacket(TrackType aTrackType);
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// Returns an initialized ogg packet with data obtained from the WebM container.
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ogg_packet InitOggPacket(unsigned char* aData,
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size_t aLength,
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PRBool aBOS,
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PRBool aEOS,
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PRInt64 aGranulepos);
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// Decode a nestegg packet of audio data. Push the audio data on the
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// audio queue. Returns PR_TRUE when there's more audio to decode,
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// PR_FALSE if the audio is finished, end of file has been reached,
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// or an un-recoverable read error has occured. The reader's monitor
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// must be held during this call. This function will free the packet
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// so the caller must not use the packet after calling.
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PRBool DecodeAudioPacket(nestegg_packet* aPacket, PRInt64 aOffset);
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// Release context and set to null. Called when an error occurs during
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// reading metadata or destruction of the reader itself.
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void Cleanup();
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// Returns PR_TRUE if we should decode up to the seek target rather than
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// seeking to the target using an index-assisted seek. We should do this
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// if the seek target (aTarget, in ms), lies not too far ahead of the
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// current playback position (aCurrentTime, in ms).
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PRBool CanDecodeToTarget(PRInt64 aTarget, PRInt64 aCurrentTime);
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private:
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// libnestegg context for webm container. Access on state machine thread
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// or decoder thread only.
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nestegg* mContext;
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// VP8 decoder state
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vpx_codec_ctx_t mVP8;
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// Vorbis decoder state
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vorbis_info mVorbisInfo;
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vorbis_comment mVorbisComment;
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vorbis_dsp_state mVorbisDsp;
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vorbis_block mVorbisBlock;
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PRUint32 mPacketCount;
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PRUint32 mChannels;
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// Queue of video and audio packets that have been read but not decoded. These
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// must only be accessed from the state machine thread.
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PacketQueue mVideoPackets;
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PacketQueue mAudioPackets;
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// Index of video and audio track to play
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PRUint32 mVideoTrack;
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PRUint32 mAudioTrack;
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// Time in ms of the start of the first audio sample we've decoded.
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PRInt64 mAudioStartMs;
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// Number of samples we've decoded since decoding began at mAudioStartMs.
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PRUint64 mAudioSamples;
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// Parser state and computed offset-time mappings. Shared by multiple
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// readers when decoder has been cloned. Main thread only.
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nsRefPtr<nsWebMBufferedState> mBufferedState;
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// Booleans to indicate if we have audio and/or video data
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PRPackedBool mHasVideo;
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PRPackedBool mHasAudio;
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};
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#endif
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