Initial community commit

Src/Plugins/Input/in_wave/ExtendedRead.cpp

@@ -0,0 +1,80 @@
+#include "main.h"
+#include <stddef.h>
+
+struct ExtendedRead
+{
+	SF_INFO info;
+	SNDFILE *soundFile;
+	int bits;
+	int frameSize;
+};
+
+extern "C"
+{
+	//returns handle!=0 if successful, 0 if error
+	//size will return the final nb of bytes written to the output, -1 if unknown
+	__declspec( dllexport ) intptr_t winampGetExtendedRead_openW( const wchar_t *fn, int *size, int *bps, int *nch, int *srate )
+	{
+		ExtendedRead *extRead = (ExtendedRead *)calloc( 1, sizeof( ExtendedRead ) );
+
+		extRead->info.format = 0;
+		extRead->soundFile = sf_wchar_open( fn, SFM_READ, &extRead->info );
+		if ( !extRead->soundFile )
+		{
+			free( extRead );
+			return 0;
+		}
+
+		switch ( extRead->info.format & SF_FORMAT_SUBMASK )
+		{
+			case SF_FORMAT_FLOAT:
+			case SF_FORMAT_DOUBLE:
+				sf_command( extRead->soundFile, SFC_SET_SCALE_FLOAT_INT_READ, NULL, SF_TRUE );
+				break;
+		}
+
+		extRead->bits = 16; // TODO: calculate bits per sample (what we want to use, not necessarily what the file has)
+
+		*bps   = extRead->bits;
+		*nch   = extRead->info.channels;
+		*srate = extRead->info.samplerate;
+
+		extRead->frameSize = ( extRead->bits / 8 ) * extRead->info.channels;
+		
+		*size = (int)extRead->info.frames * extRead->frameSize; // TODO: is this correct?
+
+		return (intptr_t)extRead;
+	}
+
+	//returns nb of bytes read. -1 if read error (like CD ejected). if (ret<len), EOF is assumed
+	__declspec( dllexport ) intptr_t winampGetExtendedRead_getData( intptr_t handle, char *dest, int len, int *killswitch )
+	{
+		ExtendedRead *extRead = (ExtendedRead *)handle;
+		
+		sf_count_t framesRead = sf_readf_short( extRead->soundFile, (short *)dest, len / extRead->frameSize );
+		
+		return (int)framesRead * extRead->frameSize;
+	}
+
+	// return nonzero on success, zero on failure.
+	__declspec( dllexport ) int winampGetExtendedRead_setTime( intptr_t handle, int time_in_ms )
+	{
+		ExtendedRead *extRead = (ExtendedRead *)handle;
+		if ( !extRead->info.seekable )
+			return 0;
+
+		int frames = MulDiv( time_in_ms, extRead->info.samplerate, 1000 ); // TODO: verify calculation
+		
+		sf_seek( extRead->soundFile, frames, SEEK_SET );
+		
+		return 1;
+	}
+
+	__declspec( dllexport ) void winampGetExtendedRead_close( intptr_t handle )
+	{
+		ExtendedRead *extRead = (ExtendedRead *)handle;
+		sf_close( extRead->soundFile );
+
+		free( extRead );
+	}
+}