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math: remove path.h dependency 

math.h is an external header, provided by libc, whereas SOF
is a stand-alone executable, that must not depend on any system
headers. Particularly math.h isn't available when building with
Zephyr. The only inclusion of math.h in SOF currently is only
needed for the M_PI definition. Define it locally with a
slightly different name to eliminate the dependency and fix
Zephyr builds.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2021-04-27 12:07:09 +02:00 committed by Liam Girdwood
parent d6f6a456c1
commit b5b244f116
1 changed files with 7 additions and 6 deletions
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13
src/math/trig.c
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@ -9,9 +9,7 @@
#include <sof/audio/format.h>
#include <sof/math/trig.h>
#include <stdint.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <stdint.h>
#define CORDICSINE_TABLE_SIZE 31
/* Compute fixed point cordicsine with table lookup and interpolation
* The cordic sine algorithm converges, when the angle is in the range
@ -28,6 +26,9 @@
* +------------------+-----------------+--------+--------+
*/
/* Use a local definition to avoid adding a dependency on <math.h> */
#define _M_PI 3.14159265358979323846 /* pi */
int32_t sin_fixed(int32_t th_rad_fxp)
{
/*cordic_atan2_lookup_table = atan(2.^-(0:N-1)) N = 31
@ -47,11 +48,11 @@ int32_t sin_fixed(int32_t th_rad_fxp)
/* 652032874 , deg = 69.586061*/
const int32_t CORDICSINE_LUT_Q29FL = Q_CONVERT_FLOAT(1.214505869895220, 29);
/* 421657428 , deg = 90.000000 */
const int32_t CORDICSINE_PIOVERTWO_Q28FL = Q_CONVERT_FLOAT(M_PI / 2, 28);
const int32_t CORDICSINE_PIOVERTWO_Q28FL = Q_CONVERT_FLOAT(_M_PI / 2, 28);
/* 843314857, deg = 90.000000 */
const int32_t CORDICSINE_PIOVERTWO_Q29FL = Q_CONVERT_FLOAT(M_PI / 2, 29);
const int32_t CORDICSINE_PIOVERTWO_Q29FL = Q_CONVERT_FLOAT(_M_PI / 2, 29);
/* 1686629713, deg = 90.000000 */
const int32_t CORDICSINE_PIOVERTWO_Q30FL = Q_CONVERT_FLOAT(M_PI / 2, 30);
const int32_t CORDICSINE_PIOVERTWO_Q30FL = Q_CONVERT_FLOAT(_M_PI / 2, 30);
/*Addition or subtraction by a multiple of pi/2 is done in the data type
*of the input. When the fraction length is 29, then the quantization error