gecko/content/media/raw/nsRawReader.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brad Lassey
* Kyle Huey <me@kylehuey.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#if !defined(nsRawReader_h_)
#define nsRawReader_h_
#include "nsBuiltinDecoderReader.h"
struct nsRawVideo_PRUint24 {
operator PRUint32() const { return value[2] << 16 | value[1] << 8 | value[0]; }
private:
PRUint8 value[3];
};
struct nsRawPacketHeader {
typedef nsRawVideo_PRUint24 PRUint24;
PRUint8 packetID;
PRUint24 codecID;
};
// This is Arc's draft from wiki.xiph.org/OggYUV
struct nsRawVideoHeader {
typedef nsRawVideo_PRUint24 PRUint24;
PRUint8 headerPacketID; // Header Packet ID (always 0)
PRUint24 codecID; // Codec identifier (always "YUV")
PRUint8 majorVersion; // Version Major (breaks backwards compat)
PRUint8 minorVersion; // Version Minor (preserves backwards compat)
PRUint16 options; // Bit 1: Color (false = B/W)
// Bits 2-4: Chroma Pixel Shape
// Bit 5: 50% horizontal offset for Cr samples
// Bit 6: 50% vertical ...
// Bits 7-8: Chroma Blending
// Bit 9: Packed (false = Planar)
// Bit 10: Cr Staggered Horizontally
// Bit 11: Cr Staggered Vertically
// Bit 12: Unused (format is always little endian)
// Bit 13: Interlaced (false = Progressive)
// Bits 14-16: Interlace options (undefined)
PRUint8 alphaChannelBpp;
PRUint8 lumaChannelBpp;
PRUint8 chromaChannelBpp;
PRUint8 colorspace;
PRUint24 frameWidth;
PRUint24 frameHeight;
PRUint24 aspectNumerator;
PRUint24 aspectDenominator;
PRUint32 framerateNumerator;
PRUint32 framerateDenominator;
};
class nsRawReader : public nsBuiltinDecoderReader
{
public:
nsRawReader(nsBuiltinDecoder* aDecoder);
~nsRawReader();
virtual nsresult Init(nsBuiltinDecoderReader* aCloneDonor);
virtual nsresult ResetDecode();
virtual PRBool DecodeAudioData();
virtual PRBool DecodeVideoFrame(PRBool &aKeyframeSkip,
PRInt64 aTimeThreshold);
virtual PRBool HasAudio()
{
return PR_FALSE;
}
virtual PRBool HasVideo()
{
return PR_TRUE;
}
virtual nsresult ReadMetadata(nsVideoInfo* aInfo);
virtual nsresult Seek(PRInt64 aTime, PRInt64 aStartTime, PRInt64 aEndTime, PRInt64 aCurrentTime);
virtual nsresult GetBuffered(nsTimeRanges* aBuffered, PRInt64 aStartTime);
private:
PRBool ReadFromStream(nsMediaStream *aStream, PRUint8 *aBuf,
PRUint32 aLength);
nsRawVideoHeader mMetadata;
PRUint32 mCurrentFrame;
double mFrameRate;
PRUint32 mFrameSize;
nsIntRect mPicture;
};
#endif