/*
* strawberry_mpegheader.h last updated by David Parker <david@neongoat.com>
* $Id: strawberry_mpegheader.h,v 1.4 2000/02/08 03:07:29 dap24 Exp $
*
* Strawberry Library - A class for MPEG header extraction and ID3 tag manipulation
* Copyright (C) 1999-2000 David Parker, Neon Goat Productions. All rights reserved.
* http://www.neongoat.com - david@neongoat.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
// strawberry_mpegheader.h: interface for the SB_MPEGHeader class.
//
#if !defined(AFX_STRAWBERRY_MPEGHEADER_H__806D7661_1AB0_11D3_B3F8_00A0CC3D7E01__INCLUDED_)
#define AFX_STRAWBERRY_MPEGHEADER_H__806D7661_1AB0_11D3_B3F8_00A0CC3D7E01__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class SB_MPEGHeader
{
public:
SB_MPEGHeader();
~SB_MPEGHeader();
enum SB_MPEG_VERSION {MPEG_VERSION_UNDEF=0, MPEG_VERSION_1, MPEG_VERSION_2, MPEG_VERSION_25};
enum SB_MPEG_LAYER {MPEG_LAYER_UNDEF=0, MPEG_LAYER_1, MPEG_LAYER_2, MPEG_LAYER_3};
enum SB_MPEG_CHANNELMODE {MPEG_MODE_UNDEF=0, MPEG_MODE_STEREO, MPEG_MODE_JOINTSTEREO, MPEG_MODE_DUALCHANNEL, MPEG_MODE_SINGLECHANNEL};
enum SB_MPEG_CHANNELEXTENSION {MPEG_EXTENSION_UNDEF=0, MPEG_EXTENSION_12_4_31, MPEG_EXTENSION_12_8_31, MPEG_EXTENSION_12_12_31, MPEG_EXTENSION_12_16_31, MPEG_EXTENSION_3_NI_NM, MPEG_EXTENSION_3_YI_NM, MPEG_EXTENSION_3_NI_YM, MPEG_EXTENSION_3_YI_YM}; //obfuscated, i know... you know a better way? :)
enum SB_MPEG_EMPHASIS {MPEG_EMPH_UNDEF=0, MPEG_EMPH_NONE, MPEG_EMPH_5015MS, MPEG_EMPH_CCITT_J17};
bool Open(CFile *openfile);
bool Open(const CString &filename);
bool ExtractHeader();
bool Close();
void EraseAllFields();
CString GenerateReport();
//accessors:
bool IsFrameSynced() {return m_Sync;};
SB_MPEG_VERSION GetVersion() {return m_Version;};
CString GetVersionString();
SB_MPEG_LAYER GetLayer() {return m_Layer;};
CString GetLayerString();
bool IsCRCs() {return m_CRC;};
int GetBitrate() {return m_Bitrate;};
CString GetBitrateString();
int GetSamplingRate() {return m_SamplingRate;};
CString GetSamplingRateString();
bool IsPadded() {return m_Padding;};
bool IsPrivate() {return m_Private;};
SB_MPEG_CHANNELMODE GetChannelMode() {return m_ChannelMode;};
CString GetChannelModeString();
SB_MPEG_CHANNELEXTENSION GetChannelModeExtension() {return m_ChannelModeExtension;};
CString GetChannelModeExtensionString();
bool IsCopyrighted() {return m_Copyright;};
bool IsOriginal() {return m_Original;};
SB_MPEG_EMPHASIS GetEmphasis() {return m_Emphasis;};
CString GetEmphasisString();
long GetNumFrames() {return m_numframes;};
long GetNumSeconds() {return m_numseconds;};
//10-330
protected:
DWORD SwapEndian(DWORD binary);
int ExtractBinary(DWORD binary, int leastSig, int mostSig);
bool ExtractHeader(long offset);
void ScanFrames();
//MPEG header items:
bool m_Sync;
SB_MPEG_VERSION m_Version;
SB_MPEG_LAYER m_Layer;
bool m_CRC;
int m_Bitrate;
int m_SamplingRate;
bool m_Padding;
bool m_Private; //not defined, available for private use
SB_MPEG_CHANNELMODE m_ChannelMode;
SB_MPEG_CHANNELEXTENSION m_ChannelModeExtension; // unimplemented, here as a placeholder
bool m_Copyright;
bool m_Original;
SB_MPEG_EMPHASIS m_Emphasis;
//MPEG general information:
long m_numbytes;
long m_numseconds;
long m_numframes;
private:
DWORD *rawdata;
CFile *openfile;
bool myOpenfile;
CString filename;
long m_framesize;
/**************************************
BEGIN DOXYGEN DOCUMENTATION COMMENTS
**************************************/
};
const int bitrates[5][16] =
{
// 0 = free (application specific)
// -1 = undefined
/* MPEG 1.0 Layer 1 */ {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, -1},
/* MPEG 1.0 Layer 2 */ {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, -1},
/* MPEG 1.0 Layer 3 */ {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, -1},
/* MPEG 2.x Layer 1 */ {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, -1},
/* MPEG 2.x Layer 2 and 3 */ {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, -1}
};
const int samplingrates[3][4] =
{
// -1 = undef
/* MPEG 1.0 */ {44100, 48000, 32000, -1},
/* MPEG 2.0 */ {22050, 24000, 16000, -1},
/* MPEG 2.5 */ {11025, 12000, 8000, -1}
};
#endif // !defined(AFX_STRAWBERRY_MPEGHEADER_H__806D7661_1AB0_11D3_B3F8_00A0CC3D7E01__INCLUDED_)
