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#include "textWriter.h"
#include "../../ComLightLib/comLightClient.h"
#include <array>
#define WIN32_LEAN_AND_MEAN
#include <pathcch.h>
#include <atlstr.h>
#include <atlfile.h>
#pragma comment(lib, "Pathcch.lib")
namespace
{
HRESULT replaceExtension( CString& path, LPCTSTR inputPath, LPCTSTR ext )
{
path = inputPath;
const size_t len = (size_t)path.GetLength() + 4;
wchar_t* buffer = path.GetBufferSetLength( (int)len );
const HRESULT hr = PathCchRenameExtension( buffer, len, ext );
path.ReleaseBuffer();
return hr;
}
// Abstract base class for text writers
class Writer
{
protected:
CAtlFile file;
virtual HRESULT impl( const Whisper::sSegment* const segments, const size_t length ) = 0;
public:
HRESULT write( Whisper::iContext* context, LPCTSTR audioPath, LPCTSTR ext )
{
CString path;
CHECK( replaceExtension( path, audioPath, ext ) );
CHECK( file.Create( path, GENERIC_WRITE, 0, CREATE_ALWAYS ) );
using namespace Whisper;
const eResultFlags resultFlags = eResultFlags::Timestamps | eResultFlags::Tokens;
ComLight::CComPtr<iTranscribeResult> result;
CHECK( context->getResults( resultFlags, &result ) );
sTranscribeLength len;
CHECK( result->getSize( len ) );
const sSegment* const segments = result->getSegments();
return impl( segments, len.countSegments );
}
};
HRESULT writeUtf8Bom( CAtlFile& file )
{
const std::array<uint8_t, 3> bom = { 0xEF, 0xBB, 0xBF };
return file.Write( bom.data(), 3 );
}
void printTime( CStringA& rdi, Whisper::sTimeSpan time, bool comma )
{
Whisper::sTimeSpanFields fields = time;
const char separator = comma ? ',' : '.';
rdi.AppendFormat( "%02d:%02d:%02d%c%03d",
(int)fields.hours,
(int)fields.minutes,
(int)fields.seconds,
separator,
fields.ticks / 10'000 );
}
void printTimeStamp( CStringA& rdi, Whisper::sTimeSpan ts )
{
Whisper::sTimeSpanFields fields = ts;
uint32_t msec = fields.ticks / 10'000;
uint32_t hr = fields.days * 24 + fields.hours;
uint32_t min = fields.minutes;
uint32_t sec = fields.seconds;
rdi.AppendFormat( "%02d:%02d:%02d.%03d", hr, min, sec, msec );
}
const char* skipBlank( const char* rsi )
{
while( true )
{
const char c = *rsi;
if( c == ' ' || c == '\t' )
{
rsi++;
continue;
}
return rsi;
}
}
inline const char* cstr( const CStringA& s ) { return s; }
HRESULT writeString( CAtlFile& file, const CStringA& line )
{
if( line.GetLength() > 0 )
CHECK( file.Write( cstr( line ), (DWORD)line.GetLength() ) );
return S_OK;
}
// Writer for UTF-8 text files
class TextWriter : public Writer
{
const bool timestamps;
HRESULT impl( const Whisper::sSegment* const segments, const size_t length ) override final
{
CHECK( writeUtf8Bom( file ) );
using namespace Whisper;
CStringA line;
for( size_t i = 0; i < length; i++ )
{
const sSegment& seg = segments[ i ];
if( timestamps )
{
line = "[";
printTimeStamp( line, seg.time.begin );
line += " --> ";
printTimeStamp( line, seg.time.end );
line += "] ";
}
else
line = "";
line += skipBlank( seg.text );
line += "\r\n";
CHECK( writeString( file, line ) );
}
return S_OK;
}
public:
TextWriter( bool tt ) : timestamps( tt ) { }
};
// Writer for SubRip format: https://en.wikipedia.org/wiki/SubRip#SubRip_file_format
class SubRipWriter : public Writer
{
HRESULT impl( const Whisper::sSegment* const segments, const size_t length ) override final
{
CHECK( writeUtf8Bom( file ) );
using namespace Whisper;
CStringA line;
for( size_t i = 0; i < length; i++ )
{
const sSegment& seg = segments[ i ];
line.Format( "%zu\r\n", i + 1 );
printTime( line, seg.time.begin, true );
line += " --> ";
printTime( line, seg.time.end, true );
line += "\r\n";
line += skipBlank( seg.text );
line += "\r\n\r\n";
CHECK( writeString( file, line ) );
}
return S_OK;
}
};
// Writer for WebVTT format: https://en.wikipedia.org/wiki/WebVTT
class VttWriter : public Writer
{
HRESULT impl( const Whisper::sSegment* const segments, const size_t length ) override final
{
CHECK( writeUtf8Bom( file ) );
using namespace Whisper;
CStringA line;
line = "WEBVTT\r\n\r\n";
CHECK( writeString( file, line ) );
for( size_t i = 0; i < length; i++ )
{
const sSegment& seg = segments[ i ];
line = "";
printTime( line, seg.time.begin, false );
line += " --> ";
printTime( line, seg.time.end, false );
line += "\r\n";
line += skipBlank( seg.text );
line += "\r\n\r\n";
CHECK( writeString( file, line ) );
}
return S_OK;
}
};
}
HRESULT writeText( Whisper::iContext* context, LPCTSTR audioPath, bool timestamps )
{
TextWriter writer{ timestamps };
return writer.write( context, audioPath, L".txt" );
}
HRESULT writeSubRip( Whisper::iContext* context, LPCTSTR audioPath )
{
SubRipWriter writer;
return writer.write( context, audioPath, L".srt" );
}
HRESULT writeWebVTT( Whisper::iContext* context, LPCTSTR audioPath )
{
VttWriter writer;
return writer.write( context, audioPath, L".vtt" );
}
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