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/* Copyright (c) MediaArea.net SARL. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license that can
* be found in the License.html file in the root of the source tree.
*/
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// From http://bellard.org/bpg/bpg_spec.txt
//
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//---------------------------------------------------------------------------
// Pre-compilation
#include "MediaInfo/PreComp.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#include "MediaInfo/Setup.h"
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#if defined(MEDIAINFO_BPG_YES)
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#include "MediaInfo/Image/File_Bpg.h"
#include <cmath>
using namespace std;
//---------------------------------------------------------------------------
namespace MediaInfoLib
{
//---------------------------------------------------------------------------
const char* Bpg_ColorSpace(int8u ColorSpace)
{
switch (ColorSpace)
{
case 0:
case 3:
case 4: return "YUV";
case 1: return "RGB";
case 2: return "YCgCo";
default: return "";
}
};
//---------------------------------------------------------------------------
const char* Bpg_colour_primaries(int8u ColorSpace)
{
switch (ColorSpace)
{
case 0: return "BT.601";
case 3: return "BT.701";
case 4: return "BT.2020";
default: return "";
}
};
//---------------------------------------------------------------------------
const char* Bpg_Pixel_format(int8u PixelFormat)
{
switch (PixelFormat)
{
case 0 : return "Grayscale";
case 1 :
case 4 : return "4:2:0";
case 2 :
case 5 : return "4:2:2";
case 3 : return "4:4:4";
default: return "";
}
};
//***************************************************************************
// Static stuff
//***************************************************************************
//---------------------------------------------------------------------------
bool File_Bpg::FileHeader_Begin()
{
//Element_Size
if (Buffer_Size<4)
return false; //Must wait for more data
if (CC4(Buffer) != 0x425047FB) //"BPG"
{
Reject("BPG");
return false;
}
//All should be OK...
return true;
}
//***************************************************************************
// Buffer - Global
//***************************************************************************
//---------------------------------------------------------------------------
void File_Bpg::Read_Buffer_Continue()
{
//Parsing
Ztring Version;
int64u Width, Height;
int8u pixelformat, BitsDepth, ColorSpace;
bool Alpha1_flag, Alpha2_flag, ReservedZeros, limited_range_flag, ExtensionPresentFlag;
Element_Begin1("File header");
Skip_C4( "Magic"); // File Magic
BS_Begin();
Get_S1 (3, pixelformat, "pixel_format"); Param_Info1(Bpg_Pixel_format(pixelformat));
Get_SB (Alpha1_flag, "Alpha1 Present Flag");
Get_S1 (4, BitsDepth, "bit_depth_minus_8");
Get_S1(4, ColorSpace, "color_space"); Param_Info1(Bpg_ColorSpace(ColorSpace)); Param_Info1(Bpg_colour_primaries(ColorSpace));
Get_SB (ExtensionPresentFlag, "Extension Present Flag");
Get_SB (Alpha2_flag, "Alpha2 Present Flag");
Get_SB (limited_range_flag, "limited_range_flag");
Get_SB (ReservedZeros, "Reserved");
BS_End();
Get_VS(Width, "Picture Width");
Get_VS(Height, "Picture Height");
Element_End0();
FILLING_BEGIN();
Accept("BPG");
Stream_Prepare(Stream_Image);
Fill(Stream_Image, 0, Image_Width, Width);
Fill(Stream_Image, 0, Image_Height, Height);
Fill(Stream_Image, 0, Image_Format, __T("BPG"));
Fill(Stream_Image, 0, Image_ChromaSubsampling, Bpg_Pixel_format(pixelformat));
Fill(Stream_Image, 0, Image_ColorSpace, Bpg_ColorSpace(ColorSpace));
Fill(Stream_Image, 0, Image_colour_primaries, Bpg_colour_primaries(ColorSpace));
Fill(Stream_Image, 0, Image_BitDepth, BitsDepth + 8);
Fill(Stream_Image, 0, Image_Codec, __T("BPG"));
FILLING_END();
Finish("BPG");
}
} //NameSpace
#endif
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