guliverkli: C:/guliverkli/src/filters/transform/avi2ac3filter/AVI2AC3Filter.h Source File

00001 /* 
00002  *      Copyright (C) 2003-2005 Gabest
00003  *      http://www.gabest.org
00004  *
00005  *  This Program is free software; you can redistribute it and/or modify
00006  *  it under the terms of the GNU General Public License as published by
00007  *  the Free Software Foundation; either version 2, or (at your option)
00008  *  any later version.
00009  *   
00010  *  This Program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00013  *  GNU General Public License for more details.
00014  *   
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with GNU Make; see the file COPYING.  If not, write to
00017  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
00018  *  http://www.gnu.org/copyleft/gpl.html
00019  *
00020  */
00021 
00022 #pragma once
00023 
00024 /*  AC3 audio
00025 
00026     wFormatTag          WAVE_FORMAT_DOLBY_AC3
00027     nChannels           1 -6 channels valid
00028     nSamplesPerSec      48000, 44100, 32000
00029     nAvgByesPerSec      4000 to 80000
00030     nBlockAlign         128 - 3840
00031     wBitsPerSample      Up to 24 bits - (in the original)
00032 
00033 */
00034 
00035 typedef struct tagDOLBYAC3WAVEFORMAT
00036 {
00037     WAVEFORMATEX     wfx;
00038     BYTE             bBigEndian;       // TRUE = Big Endian, FALSE little endian
00039     BYTE             bsid;
00040     BYTE             lfeon;
00041     BYTE             copyrightb;
00042     BYTE             nAuxBitsCode;  //  Aux bits per frame
00043 } DOLBYAC3WAVEFORMAT;
00044 
00045 //
00046 // CAVI2AC3Filter
00047 //
00048 
00049 [uuid("93230DD0-7B3C-4efb-AFBB-DC380FEC9E6B")]
00050 class CAVI2AC3Filter : public CTransformFilter
00051 {
00052         bool CheckAC3(const CMediaType* pmt);
00053         bool CheckDTS(const CMediaType* pmt);
00054         bool CheckWAVEAC3(const CMediaType* pmt);
00055         bool CheckWAVEDTS(const CMediaType* pmt);
00056 
00057 public:
00058         CAVI2AC3Filter(LPUNKNOWN lpunk, HRESULT* phr);
00059         virtual ~CAVI2AC3Filter();
00060 
00061         HRESULT Transform(IMediaSample* pIn, IMediaSample* pOut);
00062         HRESULT CheckInputType(const CMediaType* mtIn);
00063         HRESULT CheckTransform(const CMediaType* mtIn, const CMediaType* mtOut);
00064         HRESULT DecideBufferSize(IMemAllocator* pAllocator, ALLOCATOR_PROPERTIES* pProperties);
00065         HRESULT GetMediaType(int iPosition, CMediaType* pMediaType);
00066 };