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This group regroups all the defined macros you can use in your project.

Limit values in floating-point format of a signed fixed-point number typed Qa.b

#define DSP_FP_MAX(a, b)   (((float) (1 << ((a)-1))) - DSP_FP_RES(a, b))
 Return the maximal value of a fixed-point Qa.b typed number. The result is returned as a floating point number. More...
 
#define DSP_FP_MIN(a, b)   (-((float) (1 << ((a)-1))))
 Return the minimal value of a fixed-point Qa.b typed number. The result is returned as a floating point number. More...
 

Limit values in fixed-point format of a signed fixed-point number typed Qa.b

#define DSP_Q_MAX(a, b)   ((S32) (((U32) -1) >> (32 - ((a)+(b)-1))))
 Return the maximal value of a fixed-point Qa.b typed number. More...
 
#define DSP_Q_MIN(a, b)   ((S32) ((-1) << ((a)+(b)-1)))
 Return the minimal value of a fixed-point Qa.b typed number. More...
 

Resolution in floating-point format of a signed fixed-point number typed Qa.b

#define DSP_FP_RES(a, b)   (1./((unsigned) (1 << (b))))
 Return the resolution of a fixed-point Qa.b typed number. More...
 

Convertion macro from a float to a Q Formated value

Note
These macros limit the number in its range
#define DSP_Q(a, b, fnum)
 Convert a float into a signed fixed-point typed Qa.b. More...
 
#define DSP16_Q(fnum)   ((dsp16_t__) DSP_Q(DSP16_QA, DSP16_QB, fnum))
 Convert a float into a 16-bit signed fixed-point type. More...
 
#define DSP32_Q(fnum)   ((dsp32_t__) DSP_Q(DSP32_QA, DSP32_QB, fnum))
 Convert a float into a 32-bit signed fixed-point type. More...
 

#define DSP_FP_MAX (   a,
  b 
)    (((float) (1 << ((a)-1))) - DSP_FP_RES(a, b))

Return the maximal value of a fixed-point Qa.b typed number. The result is returned as a floating point number.

#define DSP_FP_MIN (   a,
  b 
)    (-((float) (1 << ((a)-1))))

Return the minimal value of a fixed-point Qa.b typed number. The result is returned as a floating point number.

Referenced by gui_buffer_print_dsp16_bars(), and gui_buffer_print_dsp16_signal().

#define DSP_FP_RES (   a,
  b 
)    (1./((unsigned) (1 << (b))))

Return the resolution of a fixed-point Qa.b typed number.

#define DSP_Q (   a,
  b,
  fnum 
)
Value:
(((fnum) >= DSP_FP_MAX(a, b) - DSP_FP_RES(a, b))?\
(((fnum) <= DSP_FP_MIN(a, b) + DSP_FP_RES(a, b))?\
(((fnum)*(((unsigned) (1 << (b))))))))
#define DSP_Q_MAX(a, b)
Return the maximal value of a fixed-point Qa.b typed number.
Definition: dsp_types.h:265
#define DSP_Q_MIN(a, b)
Return the minimal value of a fixed-point Qa.b typed number.
Definition: dsp_types.h:269
JOCTET b[APPN_DATA_LEN]
Definition: jdmarker.c:693
#define DSP_FP_MAX(a, b)
Return the maximal value of a fixed-point Qa.b typed number. The result is returned as a floating poi...
Definition: dsp_types.h:252
return a(a%b)
#define DSP_FP_RES(a, b)
Return the resolution of a fixed-point Qa.b typed number.
Definition: dsp_types.h:278
#define DSP_FP_MIN(a, b)
Return the minimal value of a fixed-point Qa.b typed number. The result is returned as a floating poi...
Definition: dsp_types.h:256

Convert a float into a signed fixed-point typed Qa.b.

Referenced by dsp16_filt_lpfirdesign(), dsp16_filt_lpfirdesign_windowed_sinc(), dsp16_op_exp(), dsp16_op_kaiser_i0(), dsp16_op_log10(), dsp16_op_log2(), dsp16_op_pow(), dsp16_win_gauss(), and dsp16_win_kaiser().

#define DSP_Q_MAX (   a,
  b 
)    ((S32) (((U32) -1) >> (32 - ((a)+(b)-1))))

Return the maximal value of a fixed-point Qa.b typed number.

Referenced by dsp16_op_exp(), dsp16_op_pow(), dsp16_vect_min(), dsp32_op_exp(), dsp32_op_pow(), dsp32_vect_min(), and dsp_debug_read_q().

#define DSP_Q_MIN (   a,
  b 
)    ((S32) ((-1) << ((a)+(b)-1)))