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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.
*/
//---------------------------------------------------------------------------
// Pre-compilation
#include "MediaInfo/PreComp.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#include "MediaInfo/Setup.h"
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#if defined(MEDIAINFO_APE_YES)
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#include "MediaInfo/Audio/File_Ape.h"
using namespace std;
using namespace ZenLib;
//---------------------------------------------------------------------------
namespace MediaInfoLib
{
//***************************************************************************
// Infos
//***************************************************************************
//---------------------------------------------------------------------------
int32u Ape_SamplesPerFrame(int16u Version, int16u CompressionLevel)
{
if (Version>=3950)
return 73728*4;
else if (Version>=3900)
return 73728;
else if (Version>=3800 && CompressionLevel==4000)
return 73728;
else
return 9216;
}
//---------------------------------------------------------------------------
const char* Ape_Codec_Settings(int16u Setting)
{
switch (Setting)
{
case 1000 : return "Fast";
case 2000 : return "Normal";
case 3000 : return "High";
case 4000 : return "Extra-high";
case 5000 : return "Insane";
default : return "";
}
}
//***************************************************************************
// Constructor/Destructor
//***************************************************************************
//---------------------------------------------------------------------------
File_Ape::File_Ape()
:File__Analyze(), File__Tags_Helper()
{
//File__Tags_Helper
Base=this;
}
//***************************************************************************
// Streams management
//***************************************************************************
//---------------------------------------------------------------------------
void File_Ape::Streams_Finish()
{
//Filling
int64u CompressedSize=File_Size-TagsSize;
float32 CompressionRatio=((float32)UncompressedSize)/CompressedSize;
int64u BitRate=Duration?(CompressedSize*8*1000/Duration):0;
Fill(Stream_Audio, 0, Audio_Compression_Ratio, CompressionRatio);
Fill(Stream_Audio, 0, Audio_BitRate, BitRate);
File__Tags_Helper::Streams_Finish();
}
//***************************************************************************
// Buffer
//***************************************************************************
//---------------------------------------------------------------------------
bool File_Ape::FileHeader_Begin()
{
if (!File__Tags_Helper::FileHeader_Begin())
return false;
//Testing
if (Buffer_Size<Buffer_Offset+4)
return false;
if (Buffer[Buffer_Offset ]!=0x4D //"MAC "
|| Buffer[Buffer_Offset+1]!=0x41
|| Buffer[Buffer_Offset+2]!=0x43
|| Buffer[Buffer_Offset+3]!=0x20)
{
File__Tags_Helper::Reject("APE");
return false;
}
return true;
}
//---------------------------------------------------------------------------
void File_Ape::FileHeader_Parse()
{
//Parsing
int32u SampleRate=0, TotalFrames=0, FinalFrameSamples=0, SamplesPerFrame=0, SeekElements;
int16u Version, CompressionLevel=0, Flags=0, Channels=0, Resolution=0;
Skip_C4( "Identifier");
Get_L2 (Version, "Version");
if (Version<3980) //<3.98
{
bool Resolution8=false, Resolution24=false, no_wav_header;
Get_L2 (CompressionLevel, "CompressionLevel"); Param_Info1(Ape_Codec_Settings(CompressionLevel));
Get_L2 (Flags, "FormatFlags");
Get_Flags (Flags, 0, Resolution8, "8-bit");
Skip_Flags(Flags, 1, "crc-32");
Skip_Flags(Flags, 2, "peak_level");
Get_Flags (Flags, 3, Resolution24, "24-bit");
Skip_Flags(Flags, 4, "seek_elements");
Get_Flags (Flags, 5, no_wav_header, "no_wav_header");
if (Resolution8)
Resolution=8;
else if (Resolution24)
Resolution=24;
else
Resolution=16;
Get_L2 (Channels, "Channels");
Get_L4 (SampleRate, "SampleRate");
Skip_L4( "WavHeaderDataBytes");
Skip_L4( "WavTerminatingBytes");
Get_L4 (TotalFrames, "TotalFrames");
Get_L4 (FinalFrameSamples, "FinalFrameSamples");
SamplesPerFrame=Ape_SamplesPerFrame(Version, CompressionLevel);
Skip_L4( "PeakLevel");
Get_L4 (SeekElements, "SeekElements");
if (!no_wav_header)
Skip_XX(44, "RIFF header");
Skip_XX(SeekElements*4, "Seek table");
}
else
{
Skip_L2( "Version_High");
Skip_L4( "DescriptorBytes");
Skip_L4( "HeaderBytes");
Skip_L4( "SeekTableBytes");
Skip_L4( "WavHeaderDataBytes");
Skip_L4( "APEFrameDataBytes");
Skip_L4( "APEFrameDataBytesHigh");
Skip_L4( "WavTerminatingDataBytes");
Skip_L16( "FileMD5");
Get_L2 (CompressionLevel, "CompressionLevel"); Param_Info1(Ape_Codec_Settings(CompressionLevel));
Get_L2 (Flags, "FormatFlags");
Get_L4 (SamplesPerFrame, "BlocksPerFrame");
Get_L4 (FinalFrameSamples, "FinalFrameBlocks");
Get_L4 (TotalFrames, "TotalFrames");
Get_L2 (Resolution, "BitsPerSample");
Get_L2 (Channels, "Channels");
Get_L4 (SampleRate, "SampleRate");
}
FILLING_BEGIN();
//Coherancy
int32u Samples=(TotalFrames-1)*SamplesPerFrame+FinalFrameSamples;
if (Samples==0 || SampleRate==0 || Channels==0 || Resolution==0)
{
File__Tags_Helper::Reject("APE");
return;
}
//Filling
File__Tags_Helper::Accept("APE");
File__Tags_Helper::Streams_Fill();
Duration=((int64u)Samples)*1000/SampleRate;
UncompressedSize=Samples*Channels*(Resolution/8);
File__Tags_Helper::Stream_Prepare(Stream_Audio);
Fill(Stream_Audio, 0, Audio_Format, "Monkey's Audio");
Fill(Stream_Audio, 0, Audio_Encoded_Library_Settings, Ape_Codec_Settings(CompressionLevel));
Fill(Stream_Audio, 0, Audio_Codec, "APE");
Fill(Stream_Audio, 0, Audio_BitDepth, Resolution);
Fill(Stream_Audio, 0, Audio_Channel_s_, Channels);
Fill(Stream_Audio, 0, Audio_SamplingRate, SampleRate);
Fill(Stream_Audio, 0, Audio_Duration, Duration);
//No more need data
File__Tags_Helper::Finish("APE");
FILLING_END();
}
} //NameSpace
#endif //MEDIAINFO_APE_YES
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