celt/fixed_generic.h - Issue 107243004: Updating Opus to release 1.1

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Issue 107243004: Updating Opus to release 1.1 (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus

Patch Set: Created 7 years ago

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1 /* Copyright (C) 2007-2009 Xiph.Org Foundation	1 /* Copyright (C) 2007-2009 Xiph.Org Foundation

2 Copyright (C) 2003-2008 Jean-Marc Valin	2 Copyright (C) 2003-2008 Jean-Marc Valin

3 Copyright (C) 2007-2008 CSIRO */	3 Copyright (C) 2007-2008 CSIRO */

4 /**	4 /**

5 @file fixed_generic.h	5 @file fixed_generic.h

6 @brief Generic fixed-point operations	6 @brief Generic fixed-point operations

7 */	7 */

8 /*	8 /*

9 Redistribution and use in source and binary forms, with or without	9 Redistribution and use in source and binary forms, with or without

10 modification, are permitted provided that the following conditions	10 modification, are permitted provided that the following conditions

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33 #ifndef FIXED_GENERIC_H	33 #ifndef FIXED_GENERIC_H

34 #define FIXED_GENERIC_H	34 #define FIXED_GENERIC_H

35	35

36 /** Multiply a 16-bit signed value by a 16-bit unsigned value. The result is a 3 2-bit signed value */	36 /** Multiply a 16-bit signed value by a 16-bit unsigned value. The result is a 3 2-bit signed value */

37 #define MULT16_16SU(a,b) ((opus_val32)(opus_val16)(a)*(opus_val32)(opus_uint16)( b))	37 #define MULT16_16SU(a,b) ((opus_val32)(opus_val16)(a)*(opus_val32)(opus_uint16)( b))

38	38

39 /** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 b its */	39 /** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 b its */

40 #define MULT16_32_Q16(a,b) ADD32(MULT16_16((a),SHR((b),16)), SHR(MULT16_16SU((a) ,((b)&0x0000ffff)),16))	40 #define MULT16_32_Q16(a,b) ADD32(MULT16_16((a),SHR((b),16)), SHR(MULT16_16SU((a) ,((b)&0x0000ffff)),16))

41	41

42 /** 16x32 multiplication, followed by a 16-bit shift right (round-to-nearest). R esults fits in 32 bits */	42 /** 16x32 multiplication, followed by a 16-bit shift right (round-to-nearest). R esults fits in 32 bits */

43 #define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16((a), ((b)&0x0000ffff)),16))	43 #define MULT16_32_P16(a,b) ADD32(MULT16_16((a),SHR((b),16)), PSHR(MULT16_16SU((a ),((b)&0x0000ffff)),16))

44	44

45 /** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 b its */	45 /** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 b its */

46 #define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_1 6SU((a),((b)&0x0000ffff)),15))	46 #define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_1 6SU((a),((b)&0x0000ffff)),15))

47	47

48 /** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 b its */	48 /** 32x32 multiplication, followed by a 31-bit shift right. Results fits in 32 b its */

49 #define MULT32_32_Q31(a,b) ADD32(ADD32(SHL(MULT16_16(SHR((a),16),SHR((b),16)),1) , SHR(MULT16_16SU(SHR((a),16),((b)&0x0000ffff)),15)), SHR(MULT16_16SU(SHR((b),16 ),((a)&0x0000ffff)),15))	49 #define MULT32_32_Q31(a,b) ADD32(ADD32(SHL(MULT16_16(SHR((a),16),SHR((b),16)),1) , SHR(MULT16_16SU(SHR((a),16),((b)&0x0000ffff)),15)), SHR(MULT16_16SU(SHR((b),16 ),((a)&0x0000ffff)),15))

50	50

51 /** Compile-time conversion of float constant to 16-bit value */	51 /** Compile-time conversion of float constant to 16-bit value */

52 #define QCONST16(x,bits) ((opus_val16)(.5+(x)*(((opus_val32)1)<<(bits))))	52 #define QCONST16(x,bits) ((opus_val16)(.5+(x)*(((opus_val32)1)<<(bits))))

53	53

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125 #define MULT16_16_P14(a,b) (SHR(ADD32(8192,MULT16_16((a),(b))),14))	125 #define MULT16_16_P14(a,b) (SHR(ADD32(8192,MULT16_16((a),(b))),14))

126 #define MULT16_16_P15(a,b) (SHR(ADD32(16384,MULT16_16((a),(b))),15))	126 #define MULT16_16_P15(a,b) (SHR(ADD32(16384,MULT16_16((a),(b))),15))

127	127

128 /** Divide a 32-bit value by a 16-bit value. Result fits in 16 bits */	128 /** Divide a 32-bit value by a 16-bit value. Result fits in 16 bits */

129 #define DIV32_16(a,b) ((opus_val16)(((opus_val32)(a))/((opus_val16)(b))))	129 #define DIV32_16(a,b) ((opus_val16)(((opus_val32)(a))/((opus_val16)(b))))

130	130

131 /** Divide a 32-bit value by a 32-bit value. Result fits in 32 bits */	131 /** Divide a 32-bit value by a 32-bit value. Result fits in 32 bits */

132 #define DIV32(a,b) (((opus_val32)(a))/((opus_val32)(b)))	132 #define DIV32(a,b) (((opus_val32)(a))/((opus_val32)(b)))

133	133

134 #endif	134 #endif

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