/* * $Id: pa_converters.c,v 1.1.2.27 2005/11/02 12:14:07 rossbencina Exp $ * Portable Audio I/O Library sample conversion mechanism * * Based on the Open Source API proposed by Ross Bencina * Copyright (c) 1999-2002 Phil Burk, Ross Bencina * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files * (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * Any person wishing to distribute modifications to the Software is * requested to send the modifications to the original developer so that * they can be incorporated into the canonical version. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** @file @brief Conversion functions implementations. If the C9x function lrintf() is available, define PA_USE_C99_LRINTF to use it @todo Consider whether functions which dither but don't clip should exist, V18 automatically enabled clipping whenever dithering was selected. Perhaps we should do the same. @todo implement the converters marked IMPLEMENT ME: Float32_To_UInt8_Dither, Float32_To_UInt8_Clip, Float32_To_UInt8_DitherClip, Int32_To_Int24_Dither, Int32_To_UInt8_Dither, Int24_To_Int16_Dither, Int24_To_Int8_Dither, Int24_To_UInt8_Dither, Int16_To_Int8_Dither, Int16_To_UInt8_Dither, @todo review the converters marked REVIEW: Float32_To_Int32, Float32_To_Int32_Dither, Float32_To_Int32_Clip, Float32_To_Int32_DitherClip, Int32_To_Int16_Dither, Int32_To_Int8_Dither, Int16_To_Int32 */ #include "pa_converters.h" #include "pa_dither.h" #include "pa_endianness.h" #include "pa_types.h" PaSampleFormat PaUtil_SelectClosestAvailableFormat( PaSampleFormat availableFormats, PaSampleFormat format ) { PaSampleFormat result; format &= ~paNonInterleaved; availableFormats &= ~paNonInterleaved; if( (format & availableFormats) == 0 ) { /* NOTE: this code depends on the sample format constants being in descending order of quality - ie best quality is 0 FIXME: should write an assert which checks that all of the known constants conform to that requirement. */ if( format != 0x01 ) { /* scan for better formats */ result = format; do { result >>= 1; } while( (result & availableFormats) == 0 && result != 0 ); } else { result = 0; } if( result == 0 ){ /* scan for worse formats */ result = format; do { result <<= 1; } while( (result & availableFormats) == 0 && result != paCustomFormat ); if( (result & availableFormats) == 0 ) result = paSampleFormatNotSupported; } }else{ result = format; } return result; } /* -------------------------------------------------------------------------- */ #define PA_SELECT_FORMAT_( format, float32, int32, int24, int16, int8, uint8 ) \ switch( format & ~paNonInterleaved ){ \ case paFloat32: \ float32 \ case paInt32: \ int32 \ case paInt24: \ int24 \ case paInt16: \ int16 \ case paInt8: \ int8 \ case paUInt8: \ uint8 \ default: return 0; \ } /* -------------------------------------------------------------------------- */ #define PA_SELECT_CONVERTER_DITHER_CLIP_( flags, source, destination ) \ if( flags & paClipOff ){ /* no clip */ \ if( flags & paDitherOff ){ /* no dither */ \ return paConverters. source ## _To_ ## destination; \ }else{ /* dither */ \ return paConverters. source ## _To_ ## destination ## _Dither; \ } \ }else{ /* clip */ \ if( flags & paDitherOff ){ /* no dither */ \ return paConverters. source ## _To_ ## destination ## _Clip; \ }else{ /* dither */ \ return paConverters. source ## _To_ ## destination ## _DitherClip; \ } \ } /* -------------------------------------------------------------------------- */ #define PA_SELECT_CONVERTER_DITHER_( flags, source, destination ) \ if( flags & paDitherOff ){ /* no dither */ \ return paConverters. source ## _To_ ## destination; \ }else{ /* dither */ \ return paConverters. source ## _To_ ## destination ## _Dither; \ } /* -------------------------------------------------------------------------- */ #define PA_USE_CONVERTER_( source, destination )\ return paConverters. source ## _To_ ## destination; /* -------------------------------------------------------------------------- */ #define PA_UNITY_CONVERSION_( wordlength )\ return paConverters. Copy_ ## wordlength ## _To_ ## wordlength; /* -------------------------------------------------------------------------- */ PaUtilConverter* PaUtil_SelectConverter( PaSampleFormat sourceFormat, PaSampleFormat destinationFormat, PaStreamFlags flags ) { PA_SELECT_FORMAT_( sourceFormat, /* paFloat32: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_UNITY_CONVERSION_( 32 ), /* paInt32: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int32 ), /* paInt24: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int24 ), /* paInt16: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int16 ), /* paInt8: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int8 ), /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, UInt8 ) ), /* paInt32: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_USE_CONVERTER_( Int32, Float32 ), /* paInt32: */ PA_UNITY_CONVERSION_( 32 ), /* paInt24: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int24 ), /* paInt16: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int16 ), /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int8 ), /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, UInt8 ) ), /* paInt24: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_USE_CONVERTER_( Int24, Float32 ), /* paInt32: */ PA_USE_CONVERTER_( Int24, Int32 ), /* paInt24: */ PA_UNITY_CONVERSION_( 24 ), /* paInt16: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, Int16 ), /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, Int8 ), /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, UInt8 ) ), /* paInt16: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_USE_CONVERTER_( Int16, Float32 ), /* paInt32: */ PA_USE_CONVERTER_( Int16, Int32 ), /* paInt24: */ PA_USE_CONVERTER_( Int16, Int24 ), /* paInt16: */ PA_UNITY_CONVERSION_( 16 ), /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int16, Int8 ), /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int16, UInt8 ) ), /* paInt8: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_USE_CONVERTER_( Int8, Float32 ), /* paInt32: */ PA_USE_CONVERTER_( Int8, Int32 ), /* paInt24: */ PA_USE_CONVERTER_( Int8, Int24 ), /* paInt16: */ PA_USE_CONVERTER_( Int8, Int16 ), /* paInt8: */ PA_UNITY_CONVERSION_( 8 ), /* paUInt8: */ PA_USE_CONVERTER_( Int8, UInt8 ) ), /* paUInt8: */ PA_SELECT_FORMAT_( destinationFormat, /* paFloat32: */ PA_USE_CONVERTER_( UInt8, Float32 ), /* paInt32: */ PA_USE_CONVERTER_( UInt8, Int32 ), /* paInt24: */ PA_USE_CONVERTER_( UInt8, Int24 ), /* paInt16: */ PA_USE_CONVERTER_( UInt8, Int16 ), /* paInt8: */ PA_USE_CONVERTER_( UInt8, Int8 ), /* paUInt8: */ PA_UNITY_CONVERSION_( 8 ) ) ) } /* -------------------------------------------------------------------------- */ #ifdef PA_NO_STANDARD_CONVERTERS /* -------------------------------------------------------------------------- */ PaUtilConverterTable paConverters = { 0, /* PaUtilConverter *Float32_To_Int32; */ 0, /* PaUtilConverter *Float32_To_Int32_Dither; */ 0, /* PaUtilConverter *Float32_To_Int32_Clip; */ 0, /* PaUtilConverter *Float32_To_Int32_DitherClip; */ 0, /* PaUtilConverter *Float32_To_Int24; */ 0, /* PaUtilConverter *Float32_To_Int24_Dither; */ 0, /* PaUtilConverter *Float32_To_Int24_Clip; */ 0, /* PaUtilConverter *Float32_To_Int24_DitherClip; */ 0, /* PaUtilConverter *Float32_To_Int16; */ 0, /* PaUtilConverter *Float32_To_Int16_Dither; */ 0, /* PaUtilConverter *Float32_To_Int16_Clip; */ 0, /* PaUtilConverter *Float32_To_Int16_DitherClip; */ 0, /* PaUtilConverter *Float32_To_Int8; */ 0, /* PaUtilConverter *Float32_To_Int8_Dither; */ 0, /* PaUtilConverter *Float32_To_Int8_Clip; */ 0, /* PaUtilConverter *Float32_To_Int8_DitherClip; */ 0, /* PaUtilConverter *Float32_To_UInt8; */ 0, /* PaUtilConverter *Float32_To_UInt8_Dither; */ 0, /* PaUtilConverter *Float32_To_UInt8_Clip; */ 0, /* PaUtilConverter *Float32_To_UInt8_DitherClip; */ 0, /* PaUtilConverter *Int32_To_Float32; */ 0, /* PaUtilConverter *Int32_To_Int24; */ 0, /* PaUtilConverter *Int32_To_Int24_Dither; */ 0, /* PaUtilConverter *Int32_To_Int16; */ 0, /* PaUtilConverter *Int32_To_Int16_Dither; */ 0, /* PaUtilConverter *Int32_To_Int8; */ 0, /* PaUtilConverter *Int32_To_Int8_Dither; */ 0, /* PaUtilConverter *Int32_To_UInt8; */ 0, /* PaUtilConverter *Int32_To_UInt8_Dither; */ 0, /* PaUtilConverter *Int24_To_Float32; */ 0, /* PaUtilConverter *Int24_To_Int32; */ 0, /* PaUtilConverter *Int24_To_Int16; */ 0, /* PaUtilConverter *Int24_To_Int16_Dither; */ 0, /* PaUtilConverter *Int24_To_Int8; */ 0, /* PaUtilConverter *Int24_To_Int8_Dither; */ 0, /* PaUtilConverter *Int24_To_UInt8; */ 0, /* PaUtilConverter *Int24_To_UInt8_Dither; */ 0, /* PaUtilConverter *Int16_To_Float32; */ 0, /* PaUtilConverter *Int16_To_Int32; */ 0, /* PaUtilConverter *Int16_To_Int24; */ 0, /* PaUtilConverter *Int16_To_Int8; */ 0, /* PaUtilConverter *Int16_To_Int8_Dither; */ 0, /* PaUtilConverter *Int16_To_UInt8; */ 0, /* PaUtilConverter *Int16_To_UInt8_Dither; */ 0, /* PaUtilConverter *Int8_To_Float32; */ 0, /* PaUtilConverter *Int8_To_Int32; */ 0, /* PaUtilConverter *Int8_To_Int24 */ 0, /* PaUtilConverter *Int8_To_Int16; */ 0, /* PaUtilConverter *Int8_To_UInt8; */ 0, /* PaUtilConverter *UInt8_To_Float32; */ 0, /* PaUtilConverter *UInt8_To_Int32; */ 0, /* PaUtilConverter *UInt8_To_Int24; */ 0, /* PaUtilConverter *UInt8_To_Int16; */ 0, /* PaUtilConverter *UInt8_To_Int8; */ 0, /* PaUtilConverter *Copy_8_To_8; */ 0, /* PaUtilConverter *Copy_16_To_16; */ 0, /* PaUtilConverter *Copy_24_To_24; */ 0 /* PaUtilConverter *Copy_32_To_32; */ }; /* -------------------------------------------------------------------------- */ #else /* PA_NO_STANDARD_CONVERTERS is not defined */ /* -------------------------------------------------------------------------- */ #define PA_CLIP_( val, min, max )\ { val = ((val) < (min)) ? (min) : (((val) > (max)) ? (max) : (val)); } static const float const_1_div_128_ = 1.0f / 128.0f; /* 8 bit multiplier */ static const float const_1_div_32768_ = 1.0f / 32768.f; /* 16 bit multiplier */ static const double const_1_div_2147483648_ = 1.0 / 2147483648.0; /* 32 bit multiplier */ /* -------------------------------------------------------------------------- */ static void Float32_To_Int32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* REVIEW */ #ifdef PA_USE_C99_LRINTF float scaled = *src * 0x7FFFFFFF; *dest = lrintf(scaled-0.5f); #else double scaled = *src * 0x7FFFFFFF; *dest = (PaInt32) scaled; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int32_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; while( count-- ) { /* REVIEW */ #ifdef PA_USE_C99_LRINTF float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = ((float)*src * (2147483646.0f)) + dither; *dest = lrintf(dithered - 0.5f); #else double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ double dithered = ((double)*src * (2147483646.0)) + dither; *dest = (PaInt32) dithered; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int32_Clip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { /* REVIEW */ #ifdef PA_USE_C99_LRINTF float scaled = *src * 0x7FFFFFFF; PA_CLIP_( scaled, -2147483648.f, 2147483647.f ); *dest = lrintf(scaled-0.5f); #else double scaled = *src * 0x7FFFFFFF; PA_CLIP_( scaled, -2147483648., 2147483647. ); *dest = (PaInt32) scaled; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int32_DitherClip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; while( count-- ) { /* REVIEW */ #ifdef PA_USE_C99_LRINTF float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = ((float)*src * (2147483646.0f)) + dither; PA_CLIP_( dithered, -2147483648.f, 2147483647.f ); *dest = lrintf(dithered-0.5f); #else double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ double dithered = ((double)*src * (2147483646.0)) + dither; PA_CLIP_( dithered, -2147483648., 2147483647. ); *dest = (PaInt32) dithered; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; PaInt32 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { /* convert to 32 bit and drop the low 8 bits */ double scaled = *src * 0x7FFFFFFF; temp = (PaInt32) scaled; #if defined(PA_LITTLE_ENDIAN) dest[0] = (unsigned char)(temp >> 8); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 24); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(temp >> 24); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 8); #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int24_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; PaInt32 temp; while( count-- ) { /* convert to 32 bit and drop the low 8 bits */ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ double dithered = ((double)*src * (2147483646.0)) + dither; temp = (PaInt32) dithered; #if defined(PA_LITTLE_ENDIAN) dest[0] = (unsigned char)(temp >> 8); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 24); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(temp >> 24); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 8); #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int24_Clip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; PaInt32 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { /* convert to 32 bit and drop the low 8 bits */ double scaled = *src * 0x7FFFFFFF; PA_CLIP_( scaled, -2147483648., 2147483647. ); temp = (PaInt32) scaled; #if defined(PA_LITTLE_ENDIAN) dest[0] = (unsigned char)(temp >> 8); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 24); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(temp >> 24); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 8); #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int24_DitherClip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; PaInt32 temp; while( count-- ) { /* convert to 32 bit and drop the low 8 bits */ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ double dithered = ((double)*src * (2147483646.0)) + dither; PA_CLIP_( dithered, -2147483648., 2147483647. ); temp = (PaInt32) dithered; #if defined(PA_LITTLE_ENDIAN) dest[0] = (unsigned char)(temp >> 8); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 24); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(temp >> 24); dest[1] = (unsigned char)(temp >> 16); dest[2] = (unsigned char)(temp >> 8); #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { #ifdef PA_USE_C99_LRINTF float tempf = (*src * (32767.0f)) ; *dest = lrintf(tempf-0.5f); #else short samp = (short) (*src * (32767.0f)); *dest = samp; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int16_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; while( count-- ) { float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = (*src * (32766.0f)) + dither; #ifdef PA_USE_C99_LRINTF *dest = lrintf(dithered-0.5f); #else *dest = (PaInt16) dithered; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int16_Clip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { #ifdef PA_USE_C99_LRINTF long samp = lrintf((*src * (32767.0f)) -0.5f); #else long samp = (PaInt32) (*src * (32767.0f)); #endif PA_CLIP_( samp, -0x8000, 0x7FFF ); *dest = (PaInt16) samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int16_DitherClip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = (*src * (32766.0f)) + dither; PaInt32 samp = (PaInt32) dithered; PA_CLIP_( samp, -0x8000, 0x7FFF ); #ifdef PA_USE_C99_LRINTF *dest = lrintf(samp-0.5f); #else *dest = (PaInt16) samp; #endif src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { signed char samp = (signed char) (*src * (127.0f)); *dest = samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = (*src * (126.0f)) + dither; PaInt32 samp = (PaInt32) dithered; *dest = (signed char) samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int8_Clip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { PaInt32 samp = (PaInt32)(*src * (127.0f)); PA_CLIP_( samp, -0x80, 0x7F ); *dest = (signed char) samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_Int8_DitherClip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator ); /* use smaller scaler to prevent overflow when we add the dither */ float dithered = (*src * (126.0f)) + dither; PaInt32 samp = (PaInt32) dithered; PA_CLIP_( samp, -0x80, 0x7F ); *dest = (signed char) samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_UInt8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { unsigned char samp = (unsigned char)(128 + ((unsigned char) (*src * (127.0f)))); *dest = samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_UInt8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_UInt8_Clip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Float32_To_UInt8_DitherClip( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { float *src = (float*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Float32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; float *dest = (float*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { *dest = (float) ((double)*src * const_1_div_2147483648_); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Int24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { /* REVIEW */ #if defined(PA_LITTLE_ENDIAN) dest[0] = (unsigned char)(*src >> 8); dest[1] = (unsigned char)(*src >> 16); dest[2] = (unsigned char)(*src >> 24); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(*src >> 24); dest[1] = (unsigned char)(*src >> 16); dest[2] = (unsigned char)(*src >> 8); #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Int24_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { (void) destinationBuffer; /* unused parameters */ (void) destinationStride; /* unused parameters */ (void) sourceBuffer; /* unused parameters */ (void) sourceStride; /* unused parameters */ (void) count; /* unused parameters */ (void) ditherGenerator; /* unused parameters */ /* IMPLEMENT ME */ } /* -------------------------------------------------------------------------- */ static void Int32_To_Int16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { *dest = (PaInt16) ((*src) >> 16); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Int16_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; PaInt32 dither; while( count-- ) { /* REVIEW */ dither = PaUtil_Generate16BitTriangularDither( ditherGenerator ); *dest = (PaInt16) ((((*src)>>1) + dither) >> 15); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Int8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { *dest = (signed char) ((*src) >> 24); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_Int8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; PaInt32 dither; while( count-- ) { /* REVIEW */ dither = PaUtil_Generate16BitTriangularDither( ditherGenerator ); *dest = (signed char) ((((*src)>>1) + dither) >> 23); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_UInt8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (unsigned char)(((*src) >> 24) + 128); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int32_To_UInt8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt32 *src = (PaInt32*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_Float32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; float *dest = (float*)destinationBuffer; PaInt32 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) temp = (((long)src[0]) << 8); temp = temp | (((long)src[1]) << 16); temp = temp | (((long)src[2]) << 24); #elif defined(PA_BIG_ENDIAN) temp = (((long)src[0]) << 24); temp = temp | (((long)src[1]) << 16); temp = temp | (((long)src[2]) << 8); #endif *dest = (float) ((double)temp * const_1_div_2147483648_); src += sourceStride * 3; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_Int32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; PaInt32 *dest = (PaInt32*) destinationBuffer; PaInt32 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) temp = (((long)src[0]) << 8); temp = temp | (((long)src[1]) << 16); temp = temp | (((long)src[2]) << 24); #elif defined(PA_BIG_ENDIAN) temp = (((long)src[0]) << 24); temp = temp | (((long)src[1]) << 16); temp = temp | (((long)src[2]) << 8); #endif *dest = temp; src += sourceStride * 3; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_Int16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; PaInt16 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) /* src[0] is discarded */ temp = (((PaInt16)src[1])); temp = temp | (PaInt16)(((PaInt16)src[2]) << 8); #elif defined(PA_BIG_ENDIAN) /* src[2] is discarded */ temp = (PaInt16)(((PaInt16)src[0]) << 8); temp = temp | (((PaInt16)src[1])); #endif *dest = temp; src += sourceStride * 3; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_Int16_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { (void) destinationBuffer; /* unused parameters */ (void) destinationStride; /* unused parameters */ (void) sourceBuffer; /* unused parameters */ (void) sourceStride; /* unused parameters */ (void) count; /* unused parameters */ (void) ditherGenerator; /* unused parameters */ /* IMPLEMENT ME */ } /* -------------------------------------------------------------------------- */ static void Int24_To_Int8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) /* src[0] is discarded */ /* src[1] is discarded */ *dest = src[2]; #elif defined(PA_BIG_ENDIAN) /* src[2] is discarded */ /* src[1] is discarded */ *dest = src[0]; #endif src += sourceStride * 3; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_Int8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { (void) destinationBuffer; /* unused parameters */ (void) destinationStride; /* unused parameters */ (void) sourceBuffer; /* unused parameters */ (void) sourceStride; /* unused parameters */ (void) count; /* unused parameters */ (void) ditherGenerator; /* unused parameters */ /* IMPLEMENT ME */ } /* -------------------------------------------------------------------------- */ static void Int24_To_UInt8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) /* src[0] is discarded */ /* src[1] is discarded */ *dest = (unsigned char)(src[2] + 128); #elif defined(PA_BIG_ENDIAN) *dest = (unsigned char)(src[0] + 128); /* src[1] is discarded */ /* src[2] is discarded */ #endif src += sourceStride * 3; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int24_To_UInt8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { (void) destinationBuffer; /* unused parameters */ (void) destinationStride; /* unused parameters */ (void) sourceBuffer; /* unused parameters */ (void) sourceStride; /* unused parameters */ (void) count; /* unused parameters */ (void) ditherGenerator; /* unused parameters */ /* IMPLEMENT ME */ } /* -------------------------------------------------------------------------- */ static void Int16_To_Float32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; float *dest = (float*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float samp = *src * const_1_div_32768_; /* FIXME: i'm concerned about this being asymetrical with float->int16 -rb */ *dest = samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int16_To_Int32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* REVIEW: we should consider something like (*src << 16) | (*src & 0xFFFF) */ *dest = *src << 16; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int16_To_Int24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*) sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; PaInt16 temp; (void) ditherGenerator; /* unused parameter */ while( count-- ) { temp = *src; #if defined(PA_LITTLE_ENDIAN) dest[0] = 0; dest[1] = (unsigned char)(temp); dest[2] = (unsigned char)(temp >> 8); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(temp >> 8); dest[1] = (unsigned char)(temp); dest[2] = 0; #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Int16_To_Int8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (signed char)((*src) >> 8); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int16_To_Int8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int16_To_UInt8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (unsigned char)(((*src) >> 8) + 128); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int16_To_UInt8_Dither( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaInt16 *src = (PaInt16*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { /* IMPLEMENT ME */ src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int8_To_Float32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { signed char *src = (signed char*)sourceBuffer; float *dest = (float*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float samp = *src * const_1_div_128_; *dest = samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int8_To_Int32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { signed char *src = (signed char*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (*src) << 24; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int8_To_Int24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { signed char *src = (signed char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) dest[0] = 0; dest[1] = 0; dest[2] = (*src); #elif defined(PA_BIG_ENDIAN) dest[0] = (*src); dest[1] = 0; dest[2] = 0; #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Int8_To_Int16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { signed char *src = (signed char*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (PaInt16)((*src) << 8); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Int8_To_UInt8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { signed char *src = (signed char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (unsigned char)(*src + 128); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void UInt8_To_Float32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; float *dest = (float*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { float samp = (*src - 128) * const_1_div_128_; *dest = samp; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void UInt8_To_Int32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; PaInt32 *dest = (PaInt32*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (*src - 128) << 24; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void UInt8_To_Int24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void) ditherGenerator; /* unused parameters */ while( count-- ) { #if defined(PA_LITTLE_ENDIAN) dest[0] = 0; dest[1] = 0; dest[2] = (unsigned char)(*src - 128); #elif defined(PA_BIG_ENDIAN) dest[0] = (unsigned char)(*src - 128); dest[1] = 0; dest[2] = 0; #endif src += sourceStride; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void UInt8_To_Int16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; PaInt16 *dest = (PaInt16*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (PaInt16)((*src - 128) << 8); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void UInt8_To_Int8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; signed char *dest = (signed char*)destinationBuffer; (void)ditherGenerator; /* unused parameter */ while( count-- ) { (*dest) = (signed char)(*src - 128); src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Copy_8_To_8( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { *dest = *src; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Copy_16_To_16( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaUint16 *src = (PaUint16 *)sourceBuffer; PaUint16 *dest = (PaUint16 *)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { *dest = *src; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Copy_24_To_24( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { unsigned char *src = (unsigned char*)sourceBuffer; unsigned char *dest = (unsigned char*)destinationBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { dest[0] = src[0]; dest[1] = src[1]; dest[2] = src[2]; src += sourceStride * 3; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Copy_32_To_32( void *destinationBuffer, signed int destinationStride, void *sourceBuffer, signed int sourceStride, unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator ) { PaUint32 *dest = (PaUint32 *)destinationBuffer; PaUint32 *src = (PaUint32 *)sourceBuffer; (void) ditherGenerator; /* unused parameter */ while( count-- ) { *dest = *src; src += sourceStride; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ PaUtilConverterTable paConverters = { Float32_To_Int32, /* PaUtilConverter *Float32_To_Int32; */ Float32_To_Int32_Dither, /* PaUtilConverter *Float32_To_Int32_Dither; */ Float32_To_Int32_Clip, /* PaUtilConverter *Float32_To_Int32_Clip; */ Float32_To_Int32_DitherClip, /* PaUtilConverter *Float32_To_Int32_DitherClip; */ Float32_To_Int24, /* PaUtilConverter *Float32_To_Int24; */ Float32_To_Int24_Dither, /* PaUtilConverter *Float32_To_Int24_Dither; */ Float32_To_Int24_Clip, /* PaUtilConverter *Float32_To_Int24_Clip; */ Float32_To_Int24_DitherClip, /* PaUtilConverter *Float32_To_Int24_DitherClip; */ Float32_To_Int16, /* PaUtilConverter *Float32_To_Int16; */ Float32_To_Int16_Dither, /* PaUtilConverter *Float32_To_Int16_Dither; */ Float32_To_Int16_Clip, /* PaUtilConverter *Float32_To_Int16_Clip; */ Float32_To_Int16_DitherClip, /* PaUtilConverter *Float32_To_Int16_DitherClip; */ Float32_To_Int8, /* PaUtilConverter *Float32_To_Int8; */ Float32_To_Int8_Dither, /* PaUtilConverter *Float32_To_Int8_Dither; */ Float32_To_Int8_Clip, /* PaUtilConverter *Float32_To_Int8_Clip; */ Float32_To_Int8_DitherClip, /* PaUtilConverter *Float32_To_Int8_DitherClip; */ Float32_To_UInt8, /* PaUtilConverter *Float32_To_UInt8; */ Float32_To_UInt8_Dither, /* PaUtilConverter *Float32_To_UInt8_Dither; */ Float32_To_UInt8_Clip, /* PaUtilConverter *Float32_To_UInt8_Clip; */ Float32_To_UInt8_DitherClip, /* PaUtilConverter *Float32_To_UInt8_DitherClip; */ Int32_To_Float32, /* PaUtilConverter *Int32_To_Float32; */ Int32_To_Int24, /* PaUtilConverter *Int32_To_Int24; */ Int32_To_Int24_Dither, /* PaUtilConverter *Int32_To_Int24_Dither; */ Int32_To_Int16, /* PaUtilConverter *Int32_To_Int16; */ Int32_To_Int16_Dither, /* PaUtilConverter *Int32_To_Int16_Dither; */ Int32_To_Int8, /* PaUtilConverter *Int32_To_Int8; */ Int32_To_Int8_Dither, /* PaUtilConverter *Int32_To_Int8_Dither; */ Int32_To_UInt8, /* PaUtilConverter *Int32_To_UInt8; */ Int32_To_UInt8_Dither, /* PaUtilConverter *Int32_To_UInt8_Dither; */ Int24_To_Float32, /* PaUtilConverter *Int24_To_Float32; */ Int24_To_Int32, /* PaUtilConverter *Int24_To_Int32; */ Int24_To_Int16, /* PaUtilConverter *Int24_To_Int16; */ Int24_To_Int16_Dither, /* PaUtilConverter *Int24_To_Int16_Dither; */ Int24_To_Int8, /* PaUtilConverter *Int24_To_Int8; */ Int24_To_Int8_Dither, /* PaUtilConverter *Int24_To_Int8_Dither; */ Int24_To_UInt8, /* PaUtilConverter *Int24_To_UInt8; */ Int24_To_UInt8_Dither, /* PaUtilConverter *Int24_To_UInt8_Dither; */ Int16_To_Float32, /* PaUtilConverter *Int16_To_Float32; */ Int16_To_Int32, /* PaUtilConverter *Int16_To_Int32; */ Int16_To_Int24, /* PaUtilConverter *Int16_To_Int24; */ Int16_To_Int8, /* PaUtilConverter *Int16_To_Int8; */ Int16_To_Int8_Dither, /* PaUtilConverter *Int16_To_Int8_Dither; */ Int16_To_UInt8, /* PaUtilConverter *Int16_To_UInt8; */ Int16_To_UInt8_Dither, /* PaUtilConverter *Int16_To_UInt8_Dither; */ Int8_To_Float32, /* PaUtilConverter *Int8_To_Float32; */ Int8_To_Int32, /* PaUtilConverter *Int8_To_Int32; */ Int8_To_Int24, /* PaUtilConverter *Int8_To_Int24 */ Int8_To_Int16, /* PaUtilConverter *Int8_To_Int16; */ Int8_To_UInt8, /* PaUtilConverter *Int8_To_UInt8; */ UInt8_To_Float32, /* PaUtilConverter *UInt8_To_Float32; */ UInt8_To_Int32, /* PaUtilConverter *UInt8_To_Int32; */ UInt8_To_Int24, /* PaUtilConverter *UInt8_To_Int24; */ UInt8_To_Int16, /* PaUtilConverter *UInt8_To_Int16; */ UInt8_To_Int8, /* PaUtilConverter *UInt8_To_Int8; */ Copy_8_To_8, /* PaUtilConverter *Copy_8_To_8; */ Copy_16_To_16, /* PaUtilConverter *Copy_16_To_16; */ Copy_24_To_24, /* PaUtilConverter *Copy_24_To_24; */ Copy_32_To_32 /* PaUtilConverter *Copy_32_To_32; */ }; /* -------------------------------------------------------------------------- */ #endif /* PA_NO_STANDARD_CONVERTERS */ /* -------------------------------------------------------------------------- */ PaUtilZeroer* PaUtil_SelectZeroer( PaSampleFormat destinationFormat ) { switch( destinationFormat & ~paNonInterleaved ){ case paFloat32: return paZeroers.Zero32; case paInt32: return paZeroers.Zero32; case paInt24: return paZeroers.Zero24; case paInt16: return paZeroers.Zero16; case paInt8: return paZeroers.Zero8; case paUInt8: return paZeroers.ZeroU8; default: return 0; } } /* -------------------------------------------------------------------------- */ #ifdef PA_NO_STANDARD_ZEROERS /* -------------------------------------------------------------------------- */ PaUtilZeroerTable paZeroers = { 0, /* PaUtilZeroer *ZeroU8; */ 0, /* PaUtilZeroer *Zero8; */ 0, /* PaUtilZeroer *Zero16; */ 0, /* PaUtilZeroer *Zero24; */ 0, /* PaUtilZeroer *Zero32; */ }; /* -------------------------------------------------------------------------- */ #else /* PA_NO_STANDARD_ZEROERS is not defined */ /* -------------------------------------------------------------------------- */ static void ZeroU8( void *destinationBuffer, signed int destinationStride, unsigned int count ) { unsigned char *dest = (unsigned char*)destinationBuffer; while( count-- ) { *dest = 128; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Zero8( void *destinationBuffer, signed int destinationStride, unsigned int count ) { unsigned char *dest = (unsigned char*)destinationBuffer; while( count-- ) { *dest = 0; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Zero16( void *destinationBuffer, signed int destinationStride, unsigned int count ) { PaUint16 *dest = (PaUint16 *)destinationBuffer; while( count-- ) { *dest = 0; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ static void Zero24( void *destinationBuffer, signed int destinationStride, unsigned int count ) { unsigned char *dest = (unsigned char*)destinationBuffer; while( count-- ) { dest[0] = 0; dest[1] = 0; dest[2] = 0; dest += destinationStride * 3; } } /* -------------------------------------------------------------------------- */ static void Zero32( void *destinationBuffer, signed int destinationStride, unsigned int count ) { PaUint32 *dest = (PaUint32 *)destinationBuffer; while( count-- ) { *dest = 0; dest += destinationStride; } } /* -------------------------------------------------------------------------- */ PaUtilZeroerTable paZeroers = { ZeroU8, /* PaUtilZeroer *ZeroU8; */ Zero8, /* PaUtilZeroer *Zero8; */ Zero16, /* PaUtilZeroer *Zero16; */ Zero24, /* PaUtilZeroer *Zero24; */ Zero32, /* PaUtilZeroer *Zero32; */ }; /* -------------------------------------------------------------------------- */ #endif /* PA_NO_STANDARD_ZEROERS */