Converted TCX_MDXT_inv, TCX_MDST_inv and edxt_fx (f3c85617) · Commits · SA4 / Audio / IVAS BASOP

lib_com/cnst.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -210,6 +210,7 @@ enum{

		#define INV_LOG_2 1.442695040888963f /* 1/log(2) */
		#define INV_SQRT_2 0.70710676908493f /* 1/sqrt(2) */
		#define INV_SQRT_2_Q15 23170 /* 1/sqrt(2) in Q15 */

		#define MAX_V_MULT_MAT 100 /* maximum array length for the function v_mult_mat() */

		@@ -2926,6 +2927,7 @@ enum
		#define INV_MAX_LT_FX (Word16)((1.0f/MAX_LT)*32768)

		#define EVS_PI 3.14159265358979323846264338327950288f
		#define EVS_PI_FX 25736 /* pi in Q13 */

		#define LG10 24660 /* 10log10(2) in Q13 /

lib_com/edct_fx.c

+280 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,44 @@

		#include "math_32.h"

		static Word16 get_edxt_factor( Word16 length ) /* Returns value of sqrtf(2.f/length) in Q15 */
		{
		Word16 factor = 0; /Q15/
		IF( EQ_16( length, 512 ) )
		{
		factor = 2048;
		}
		ELSE IF( EQ_16( length, 256 ) )
		{
		factor = 2896;
		}
		ELSE IF( EQ_16( length, 128 ) )
		{
		factor = 4096;
		}
		ELSE IF( EQ_16( length, 640 ) )
		{
		factor = 1832;
		}
		ELSE IF( EQ_16( length, 320 ) )
		{
		factor = 2590;
		}
		ELSE IF( EQ_16( length, 160 ) )
		{
		factor = 3663;
		}
		ELSE IF( EQ_16( length, 80 ) )
		{
		factor = 5181;
		}
		ELSE IF( EQ_16( length, 960 ) )
		{
		factor = 1496;
		}
		return factor;
		}

		static Word16 const * get_edct_table(Word16 length, Word16 *q)
		{
		Word16 const * edct_table = NULL;
		@@ -455,3 +493,245 @@ void iedct_short_fx(

		return;
		}

		#define FAST_EDXT /* optimized FFT-based DCT/DST algorithm */
		/-------------------------------------------------------------------------
		* edxt_fx()
		*
		* DCT/DST-II or III transform (currently also calculates DCT-IV and DST-IV)
		-------------------------------------------------------------------------/

		void edxt_fx(
		const Word32 x, / i : input signal */
		Word32 y, / o : output transform */
		const Word16 length, /* i : length */
		const UWord16 kernelType, /* i : kernel type (0 - 3) */
		const UWord16 synthesis /* i : nonzero for inverse */
		)
		{
		Word16 k, m, fac = 0;
		const Word16 cosPtr = NULL, sinPtr = NULL;
		Word16 n = 0;

		IF( EQ_16( length, 512 ) )
		{
		cosPtr = cos_scale_tbl_512;
		sinPtr = sin_scale_tbl_512;
		n = 1;
		}
		ELSE IF( EQ_16( length, 256 ) )
		{
		cosPtr = cos_scale_tbl_512;
		sinPtr = sin_scale_tbl_512;
		n = 2;
		}
		ELSE IF( EQ_16( length, 128 ) )
		{
		cosPtr = cos_scale_tbl_512;
		sinPtr = sin_scale_tbl_512;
		n = 4;
		}
		ELSE IF( EQ_16( length, 640 ) )
		{
		cosPtr = cos_scale_tbl_640;
		sinPtr = sin_scale_tbl_640;
		n = 1;
		}
		ELSE IF( EQ_16( length, 320 ) )
		{
		cosPtr = cos_scale_tbl_640;
		sinPtr = sin_scale_tbl_640;
		n = 2;
		}
		ELSE IF( EQ_16( length, 160 ) )
		{
		cosPtr = cos_scale_tbl_640;
		sinPtr = sin_scale_tbl_640;
		n = 4;
		}
		ELSE IF( EQ_16( length, 80 ) )
		{
		cosPtr = cos_scale_tbl_640;
		sinPtr = sin_scale_tbl_640;
		n = 8;
		}
		ELSE IF( EQ_16( length, 960 ) )
		{
		cosPtr = cos_scale_tbl_960;
		sinPtr = sin_scale_tbl_960;
		n = 1;
		}

		#ifdef FAST_EDXT
		IF( EQ_16( kernelType, MDST_II ) \|\| EQ_16( kernelType, MDCT_II ) )
		{
		const Word16 Nm1 = sub( length, 1 );
		const Word16 xSign = sub( kernelType, 1 );
		Word32 re[L_FRAME_PLUS];
		Word32 im[L_FRAME_PLUS];

		IF( !synthesis )
		{
		FOR( k = shr( Nm1, 1 ); k >= 0; k-- ) /* pre-modulation of audio input */
		{
		re[k] = x[2 * k];
		re[Nm1 - k] = Mpy_32_16_1( x[2 * k + 1], xSign );
		im[k] = im[Nm1 - k] = 0;
		}

		IF( EQ_16( length, 512 ) )
		{
		DoRTFTn_fx( re, im, 512 );
		}
		ELSE /* fft() doesn't support 512 */
		{
		fft_fx( re, im, length, 1 );
		}

		IF( shr( kernelType, 1 ) )
		{
		FOR( k = shr( Nm1, 1 ); k > 0; k-- )
		{
		// const float wRe = cosf( scale * k );
		// const float wIm = sinf( scale * k );
		const Word16 wRe = cosPtr[k * n];
		const Word16 wIm = sinPtr[k * n];

		y[k] /pt 1/ = L_add( Mpy_32_16_1( re[k], wRe ), Mpy_32_16_1( im[k], wIm ) );
		y[length - k] = L_sub( Mpy_32_16_1( re[k], wIm ), Mpy_32_16_1( im[k], wRe ) );
		}
		y[shr( length, 1 )] = Mpy_32_16_1( re[shr( length, 1 )], INV_SQRT_2_Q15 );
		}
		ELSE /* forw. DST-II */
		{
		FOR( k = shr( Nm1, 1 ); k > 0; k-- )
		{
		// const float wRe = cosf( scale * k );
		// const float wIm = sinf( scale * k );
		const Word16 wRe = cosPtr[k * n];
		const Word16 wIm = sinPtr[k * n];

		y[Nm1 - k] = L_add( Mpy_32_16_1( re[k], wRe ), Mpy_32_16_1( im[k], wIm ) );
		y[k - 1] = L_sub( Mpy_32_16_1( re[k], wIm ), Mpy_32_16_1( im[k], wRe ) );
		}
		y[shr( Nm1, 1 )] = Mpy_32_16_1( re[shr( length, 1 )], INV_SQRT_2_Q15 );
		}

		y[Nm1 - Nm1 * (kernelType >> 1)] = L_shr( re[0], 1 );
		}
		ELSE /* inverse II = III */
		{
		IF( shr( kernelType, 1 ) )
		{
		FOR( k = shr( Nm1, 1 ); k > 0; k-- )
		{
		// const float wRe = cosf( scale * k ) * 0.5f;
		// const float wIm = sinf( scale * k ) * 0.5f;
		const Word16 wRe = shr( cosPtr[k * n], 1 );
		const Word16 wIm = shr( sinPtr[k * n], 1 );

		re[k] = L_add( Mpy_32_16_1( x[k], wRe ), Mpy_32_16_1( x[length - k], wIm ) );
		im[k] = L_sub( Mpy_32_16_1( x[length - k], wRe ), Mpy_32_16_1( x[k], wIm ) );
		}
		re[shr( length, 1 )] = Mpy_32_16_1(x[shr( length, 1 )], INV_SQRT_2_Q15);
		}
		ELSE /* DST type III */
		{
		FOR( k = shr( Nm1, 1 ); k > 0; k-- )
		{
		// const float wRe = cosf( scale * k ) * 0.5f;
		// const float wIm = sinf( scale * k ) * 0.5f;
		const Word16 wRe = shr( cosPtr[k * n], 1 );
		const Word16 wIm = shr( sinPtr[k * n], 1 );

		re[k] = L_add( Mpy_32_16_1( x[Nm1 - k], wRe ), Mpy_32_16_1( x[k - 1], wIm ) );
		im[k] = L_sub( Mpy_32_16_1( x[k - 1], wRe ), Mpy_32_16_1( x[Nm1 - k], wIm ) );
		}
		re[shr( length, 1 )] = Mpy_32_16_1(x[shr( Nm1, 1 )], INV_SQRT_2_Q15);
		}

		re[0] = x[Nm1 - Nm1 * shr(kernelType, 1)];
		im[0] = im[shr( length, 1 )] = 0;
		FOR( k = shr( Nm1, 1 ); k > 0; k-- )
		{
		re[length - k] = re[k];
		im[length - k] = L_negate( im[k] );
		}

		IF( EQ_16( length, 512 ) )
		{
		DoRTFTn_fx( re, im, 512 );
		}
		ELSE /* fft() doesn't support 512 */
		{
		fft_fx( re, im, length, 1 );
		}

		FOR( k = shr( Nm1, 1 ); k >= 0; k-- ) /* post-modulation of FFT output */
		{
		y[2 * k] = re[k];
		IF( NE_16( xSign, 0 ) )
		{
		y[2 * k + 1] = re[sub( Nm1, k )];
		}
		ELSE
		{
		y[2 * k + 1] = 0;
		}
		}
		}
		}
		#endif
		#ifdef IVAS_FLOAT_FIXED_TO_BE_DONE
		ELSE
		/* TODO: below IF and ELSE blocks are unreachable, verified on code coverage report */
		IF( s_and( kernelType, 1 ) ) /* DST */
		{
		const float offK = (kernelType == MDST_II && synthesis ? 0.5f : 1.0f - 0.5f * (kernelType >> 1));
		const float offM = (kernelType == MDST_II && synthesis ? 1.0f : 0.5f);

		FOR( k = 0; k < length; k++ )
		{
		y[k] = 0.f;
		FOR( m = 0; m < length; m++ )
		{
		y[k] += x[m] * sinf( pi_len * ( m + offM ) * ( k + offK ) );
		}
		}
		IF( offK == 1.f )
		{
		y[length - 1] = 0.5f; / scale Nyquist sample */
		}
		}
		ELSE /* kernelType 0, 2: DCT */
		{
		const float offK = ( EQ_16( kernelType, MDCT_II ) && synthesis ? 0.5f : 0.5f - shr( shr( kernelType, 1 ), 1 ) );
		const float offM = ( EQ_16( kernelType, MDCT_II ) && synthesis ? 0.0f : 0.5f );

		FOR( k = 0; k < length; k++ )
		{
		y[k] = 0.f;
		FOR( m = 0; m < length; m++ )
		{
		y[k] += x[m] * cosf( pi_len * ( m + offM ) * ( k + offK ) );
		}
		}
		IF( offK == 0.f )
		{
		y[0] = 0.5f; / scale lowest (i.e. DC) sample */
		}
		}
		#endif //IVAS_FLOAT_FIXED_TO_BE_DONE
		/v_multc(y, (kernelType == MDCT_II ? -1.f : 1.f) sqrtf(2.f / length), y, length);*/
		fac = get_edxt_factor( length ); /* Q15 */
		IF( EQ_16( kernelType, MDCT_II ) )
		{
		fac = negate( fac );
		}

		FOR( m = 0; m < length; m++ )
		{
		y[m] = Mpy_32_16_1( y[m], fac );
		}
		return;
		}

lib_com/prot_fx2.h

+26 −0

Original line number	Diff line number	Diff line
		@@ -3816,6 +3816,24 @@ void TCX_MDCT_Inverse(
		const Word16 r,
		const Word16 element_mode
		);

		void TCX_MDST_Inverse_fx(
		Word32 *x,
		Word16 x_e,
		Word16 *y,
		const Word16 l,
		const Word16 m,
		const Word16 r );

		void TCX_MDXT_Inverse_fx(
		const Word32 *x,
		Word16 x_e,
		Word16 *y,
		const Word16 l,
		const Word16 m,
		const Word16 r,
		const UWord16 kernel_type );

		//edct_fx.c
		#define EDCT_FACTOR_SCALE 2
		void edct_fx(
		@@ -3847,6 +3865,14 @@ void iedct_short_fx(
		const Word16 segment_length /* i : length */
		);

		void edxt_fx(
		const Word32 x, / i : input signal */
		Word32 y, / o : output transform */
		const Word16 length, /* i : length */
		const UWord16 kernelType, /* i : kernel type (0 - 3) */
		const UWord16 synthesis /* i : nonzero for inverse */
		);

		//fft_evs.c
		void fft16(Word32 re, Word32 im, Word16 s, Word16 bScale);
		void BASOP_cfft(cmplx pComplexBuf, Word16 sizeOfFft, Word16 scale, Word32 workBuffer[2 * BASOP_CFFT_MAX_LENGTH]);

lib_com/rom_com.c

+873 −0

File changed.

Preview size limit exceeded, changes collapsed.

lib_com/rom_com.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -2116,4 +2116,12 @@ extern const Word32 tbl_two_pow_shift_by_4[35]; /* Q30 */
		extern const Word16 ivas_tan_panning_gain_tbl_fx[601];
		extern const Word16 ivas_sine_panning_tbl_fx[601];
		extern const Word16 ivas_sin_az_fx[361];

		//edct_fx.c
		extern const Word16 sin_scale_tbl_960[960];
		extern const Word16 cos_scale_tbl_960[960];
		extern const Word16 cos_scale_tbl_640[640];
		extern const Word16 sin_scale_tbl_640[640];
		extern const Word16 sin_scale_tbl_512[512];
		extern const Word16 cos_scale_tbl_512[512];
		#endif

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