Merge branch 'stereo_mdct_core_enc_updates' into 'main' (58412847) · Commits · SA4 / Audio / IVAS BASOP

lib_com/fft_fx.c

+0 −143

Original line number	Diff line number	Diff line
		@@ -7555,146 +7555,3 @@ void rfft_fx(

		return;
		}

		Word16 find_guarded_bits_fx( Word32 n )
		{
		// return n <= 1 ? 0 : n <= 2 ? 1
		// : n <= 4 ? 2
		// : n <= 8 ? 3
		// : n <= 16 ? 4
		// : n <= 32 ? 5
		// : n <= 64 ? 6
		// : n <= 128 ? 7
		// : n <= 256 ? 8
		// : n <= 512 ? 9
		// : n <= 1024 ? 10
		// : n <= 2048 ? 11
		// : n <= 4096 ? 12
		// : n <= 8192 ? 13
		// : n <= 16384 ? 14
		// : 15;
		/*Word16 val = 0;
		move32();
		test();
		WHILE( GT_32( n, L_shl( 1, val ) ) && LT_32( val, 16 ) )
		{
		val = add( val, 1 );
		}*/
		IF( LE_32( n, 1 ) )
		{
		return 0;
		}
		ELSE
		{

		return sub( 31, norm_l( L_sub( n, 1 ) ) );
		}
		}

		Word16 L_norm_arr( const Word32 *arr, Word16 size )
		{
		Word16 q = 31;
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		Word16 q_tst;

		q_tst = norm_l( arr[i] );
		if ( arr[i] != 0 )
		{
		q = s_min( q, q_tst );
		}
		}

		return q;
		}

		Word16 norm_arr( Word16 *arr, Word16 size )
		{
		Word16 q = 15;
		Word16 exp = 0;
		move16();
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		if ( arr[i] != 0 )
		{
		exp = norm_s( arr[i] );
		}
		if ( arr[i] != 0 )
		{
		q = s_min( q, exp );
		}
		}
		return q;
		}

		Word16 W_norm_arr( Word64 *arr, Word16 size )
		{
		Word16 q = 63;
		Word16 exp = 0;
		move16();
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		if ( arr[i] != 0 )
		{
		exp = W_norm( arr[i] );
		}
		if ( arr[i] != 0 )
		{
		q = s_min( q, exp );
		}
		}
		return q;
		}

		Word16 get_min_scalefactor( Word32 x, Word32 y )
		{
		Word16 scf_y;
		Word16 scf = Q31;
		move16();

		test();
		if ( x == 0 && y == 0 )
		{
		scf = 0;
		move16();
		}

		if ( x != 0 )
		{
		scf = norm_l( x );
		}

		scf_y = norm_l( y );
		if ( y != 0 )
		{
		scf = s_min( scf_y, scf );
		}

		return scf;
		}


		Flag is_zero_arr( Word32 *arr, Word16 size )
		{
		FOR( Word16 i = 0; i < size; i++ )
		IF( arr[i] != 0 )
		{
		return 0;
		}

		return 1;
		}

		Flag is_zero_arr16( Word16 *arr, Word16 size )
		{
		FOR( Word16 i = 0; i < size; i++ )
		IF( arr[i] != 0 )
		{
		return 0;
		}

		return 1;
		}

lib_com/prot_fx.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -1444,6 +1444,13 @@ void scale_sig32(
		const Word16 lg, /* i : size of x[] Q0 */
		const Word16 exp0 /* i : exponent: x = round(x << exp) Qx xx exp */
		);

		void Scale_sig64(
		Word64 x[], /* i/o: signal to scale Qx */
		Word16 len, /* i : size of x[] Q0 */
		Word16 exp /* i : exponent: x = round(x << exp) Qx exp */
		);

		void scale_sig32_r(
		Word32 x[], /* i/o: signal to scale Qx */
		const Word16 lg, /* i : size of x[] Q0 */

lib_com/tools_fx.c

+164 −0

Original line number	Diff line number	Diff line
		@@ -4526,3 +4526,167 @@ void v_add_fixed_me(

		return;
		}

		Word16 find_guarded_bits_fx( Word32 n )
		{
		// return n <= 1 ? 0 : n <= 2 ? 1
		// : n <= 4 ? 2
		// : n <= 8 ? 3
		// : n <= 16 ? 4
		// : n <= 32 ? 5
		// : n <= 64 ? 6
		// : n <= 128 ? 7
		// : n <= 256 ? 8
		// : n <= 512 ? 9
		// : n <= 1024 ? 10
		// : n <= 2048 ? 11
		// : n <= 4096 ? 12
		// : n <= 8192 ? 13
		// : n <= 16384 ? 14
		// : 15;
		/*Word16 val = 0;
		move32();
		test();
		WHILE( GT_32( n, L_shl( 1, val ) ) && LT_32( val, 16 ) )
		{
		val = add( val, 1 );
		}*/
		IF( LE_32( n, 1 ) )
		{
		return 0;
		}
		ELSE
		{

		return sub( 31, norm_l( L_sub( n, 1 ) ) );
		}
		}

		Word16 L_norm_arr( const Word32 *arr, Word16 size )
		{
		Word16 q = 31;
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		Word16 q_tst;

		q_tst = norm_l( arr[i] );
		if ( arr[i] != 0 )
		{
		q = s_min( q, q_tst );
		}
		}

		return q;
		}

		Word16 norm_arr( Word16 *arr, Word16 size )
		{
		Word16 q = 15;
		Word16 exp = 0;
		move16();
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		if ( arr[i] != 0 )
		{
		exp = norm_s( arr[i] );
		}
		if ( arr[i] != 0 )
		{
		q = s_min( q, exp );
		}
		}
		return q;
		}

		Word16 W_norm_arr( Word64 *arr, Word16 size )
		{
		Word16 q = 63;
		Word16 exp = 0;
		move16();
		move16();
		FOR( Word16 i = 0; i < size; i++ )
		{
		if ( arr[i] != 0 )
		{
		exp = W_norm( arr[i] );
		}
		if ( arr[i] != 0 )
		{
		q = s_min( q, exp );
		}
		}
		return q;
		}

		Word16 get_min_scalefactor( Word32 x, Word32 y )
		{
		Word16 scf_y;
		Word16 scf = Q31;
		move16();

		test();
		if ( x == 0 && y == 0 )
		{
		scf = 0;
		move16();
		}

		if ( x != 0 )
		{
		scf = norm_l( x );
		}

		scf_y = norm_l( y );
		if ( y != 0 )
		{
		scf = s_min( scf_y, scf );
		}

		return scf;
		}


		Flag is_zero_arr( Word32 *arr, Word16 size )
		{
		FOR( Word16 i = 0; i < size; i++ )
		IF( arr[i] != 0 )
		{
		return 0;
		}

		return 1;
		}

		Flag is_zero_arr16( Word16 *arr, Word16 size )
		{
		FOR( Word16 i = 0; i < size; i++ )
		IF( arr[i] != 0 )
		{
		return 0;
		}

		return 1;
		}

		void Scale_sig64(
		Word64 x[], /* i/o: signal to scale Qx */
		Word16 len, /* i : size of x[] Q0 */
		Word16 exp /* i : exponent: x = round(x << exp) Qx exp */
		)
		{
		Word16 i;
		assert( exp <= 63 && exp >= -63 );
		IF( exp == 0 )
		{
		return;
		}

		FOR( i = 0; i < len; i++ )
		{
		/* saturation can occur here */
		x[i] = W_shl( x[i], exp );
		move64();
		}
		}

lib_enc/ivas_stereo_mdct_core_enc_fx.c

+148 −62

Original line number	Diff line number	Diff line
		@@ -135,10 +135,8 @@ void stereo_mdct_core_enc_fx(
		{
		Word32 orig_spectrum_long_fx[CPE_CHANNELS][N_MAX]; /* MDCT output (L/R). */
		Word32 orig_spectrum_fx[CPE_CHANNELS][NB_DIV]; / Pointers to MDCT output for a short block (L/R) */
		Word32 powerSpec_fx[CPE_CHANNELS][N_MAX];
		Word32 powerSpec_fx_tmp[CPE_CHANNELS][N_MAX]; /* This 32 bit buffer is created to preserve the precision for original separate Q calculation of powerSpec_fx buffer ( Related to 3gpp issue #1192 ) */
		Word32 *p_powerSpec_fx[CPE_CHANNELS];
		Word16 exp_powerSpec[CPE_CHANNELS][N_MAX + L_MDCT_OVLP_MAX];
		Word64 powerSpec64[CPE_CHANNELS][N_MAX];
		Word16 exp_powerSpec64[CPE_CHANNELS][NB_DIV];
		Word32 powerSpecMsInv_long_fx[CPE_CHANNELS][N_MAX]; /* MS inv power spectrum, also inverse MDST spectrum */
		Word32 *powerSpecMsInv_fx[CPE_CHANNELS][NB_DIV];
		Word32 quantized_spectrum_long_fx[CPE_CHANNELS][N_MAX]; /* quantized MDCT spectrum, inv ms mask mdst spectrum, scratch for MS spectra in the MS decision */
		@@ -153,7 +151,7 @@ void stereo_mdct_core_enc_fx(
		Word32 *p_mdst_spectrum_long_fx[CPE_CHANNELS];
		Word32 mdst_spectrum_long_fx[CPE_CHANNELS][N_MAX];
		Word32 *mdst_spectrum_fx[CPE_CHANNELS][NB_DIV];
		Word16 q_powSpec[MCT_MAX_CHANNELS], q_powSpecMsInv[MCT_MAX_CHANNELS], q_spec, tmp_s;
		Word16 q_powSpecMsInv[MCT_MAX_CHANNELS], q_spec, tmp_s;
		Word16 tmp_q_powSpec[N_MAX], tmp_q_powSpecInv[N_MAX], *tmp_q_psi[2];
		Word64 W_tmp;
		Encoder_State st, *sts;
		@@ -184,12 +182,11 @@ void stereo_mdct_core_enc_fx(
		p_orig_spectrum_long_fx[ch] = orig_spectrum_long_fx[ch];
		orig_spectrum_fx[ch][0] = orig_spectrum_long_fx[ch];
		orig_spectrum_fx[ch][1] = orig_spectrum_long_fx[ch] + N_TCX10_MAX;
		set16_fx( exp_powerSpec[ch], 0, N_MAX + L_MDCT_OVLP_MAX );
		set16_fx( exp_powerSpec64[ch], 0, NB_DIV );
		}

		set16_fx( tmp_q_powSpecInv, 63, N_MAX );
		set16_fx( tmp_q_powSpec, 63, N_MAX );
		set16_fx( q_powSpec, 31, MCT_MAX_CHANNELS );
		set16_fx( q_powSpecMsInv, 31, MCT_MAX_CHANNELS );

		tmp_q_psi[0] = tmp_q_powSpecInv;
		@@ -264,11 +261,10 @@ void stereo_mdct_core_enc_fx(
		inv_spectrum_fx[ch][1] = quantized_spectrum_fx[ch][1];
		mdst_spectrum_fx[ch][0] = mdst_spectrum_long_fx[ch];
		mdst_spectrum_fx[ch][1] = mdst_spectrum_long_fx[ch] + N_TCX10_MAX;
		set64_fx( powerSpec64[ch], 0, N_MAX );
		set32_fx( powerSpecMsInv_long_fx[ch], 0, N_MAX );
		set32_fx( quantized_spectrum_long_fx[ch], 0, N_MAX );
		set32_fx( mdst_spectrum_long_fx[ch], 0, N_MAX );
		set32_fx( powerSpec_fx[ch], 0, N_MAX );
		set32_fx( powerSpec_fx_tmp[ch], 0, N_MAX );
		set32_fx( powerSpecMsInv_long_fx[ch], 0, N_MAX );
		sts[ch]->hTcxEnc->tns_ms_flag[0] = 0;
		move16();
		@@ -383,7 +379,7 @@ void stereo_mdct_core_enc_fx(
		}
		}

		q_spec = sub( add( hdrm_min, q_spec ), 2 ); /* 2 guard bits to avoid over-flows (1 for stereo_coder_tcx_fx and other for power spectrum calculation )*/
		q_spec = sub( add( hdrm_min, q_spec ), 1 ); /* 1 guard bit to avoid over-flows in stereo_coder_tcx_fx */

		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		@@ -407,7 +403,8 @@ void stereo_mdct_core_enc_fx(
		/--------------------------------------------------------------
		* Power spectrum calculation
		---------------------------------------------------------------/
		Word16 length;
		Word16 length, exp, shift1, shift2, norm;
		Word32 mdct, mdst;

		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		@@ -437,17 +434,13 @@ void stereo_mdct_core_enc_fx(

		IF( sts[ch]->hTcxEnc->tns_ms_flag[n] )
		{
		exp = add( s_max( mdst_spectrum_e[ch][n], sts[ch]->hTcxEnc->spectrum_e[n] ), 1 );
		shift1 = sub( mdst_spectrum_e[ch][n], exp );
		shift2 = sub( sts[ch]->hTcxEnc->spectrum_e[n], exp );

		/* power spectrum: MDCT^2 + MDST^2 */
		FOR( i = 0; i < L_subframeTCX; i++ )
		{
		W_tmp = W_mac_32_32( W_mult_32_32( mdst_spectrum_fx[ch][n][i], mdst_spectrum_fx[ch][n][i] ), sts[ch]->hTcxEnc->spectrum_fx[n][i], sts[ch]->hTcxEnc->spectrum_fx[n][i] ); /* 2q_spec+1 /
		tmp_s = W_norm( W_tmp );
		W_tmp = W_shl( W_tmp, tmp_s ); /* 2q_spec+1+tmp_s /
		powerSpec_fx[ch][( i + ( n * L_subframeTCX ) )] = W_extract_h( W_tmp ); /* 2q_spec+1+tmp_s-32 /
		tmp_q_powSpec[( i + ( n * L_subframeTCX ) )] = sub( add( imult1616( q_spec, 2 ), tmp_s ), 31 ); // Q = 2 * q_spec + 1 + tmp_s - 32
		move32();
		move16();

		W_tmp = W_mac_32_32( W_mult_32_32( inv_mdst_spectrum_fx[ch][n][i], inv_mdst_spectrum_fx[ch][n][i] ), inv_spectrum_fx[ch][n][i], inv_spectrum_fx[ch][n][i] ); /* 2q_spec+1 /
		tmp_s = W_norm( W_tmp );
		W_tmp = W_shl( W_tmp, tmp_s ); /* 2q_spec+1+tmp_s /
		@@ -455,7 +448,14 @@ void stereo_mdct_core_enc_fx(
		tmp_q_psi[n][i] = sub( add( imult1616( q_spec, 2 ), tmp_s ), 31 ); // Q = 2 * q_spec + 1 + tmp_s - 32
		move32();
		move16();

		mdst = L_shl( mdst_spectrum_fx[ch][n][i], shift1 ); // exp: exp
		mdct = L_shl( sts[ch]->hTcxEnc->spectrum_fx[n][i], shift2 ); // exp: exp
		powerSpec64[ch][i + n * L_subframeTCX] = W_mac_32_32( W_mult_32_32( mdct, mdct ), mdst, mdst ); // exp: 2*exp
		move64();
		}
		exp_powerSpec64[ch][n] = shl( exp, 1 );
		move16();
		}
		ELSE
		{
		@@ -493,53 +493,31 @@ void stereo_mdct_core_enc_fx(
		}

		/* power spectrum: MDCT^2 + MDST^2 */
		W_tmp = W_mult_32_32( sts[ch]->hTcxEnc->spectrum_fx[n][0], sts[ch]->hTcxEnc->spectrum_fx[n][0] ); /* 2q_spec+1 /
		tmp_s = W_norm( W_tmp );
		W_tmp = W_shl( W_tmp, tmp_s ); /* 2q_spec+1+tmp_s /
		powerSpec_fx[ch][n * L_subframeTCX] = W_extract_h( W_tmp ); /* 2q_spec+1+tmp_s-32 /
		tmp_q_powSpec[n * L_subframeTCX] = sub( add( imult1616( q_spec, 2 ), tmp_s ), 31 ); // Q = 2 * q_spec + 1 + tmp_s - 32
		move32();
		move16();
		mdct = L_shr( sts[ch]->hTcxEnc->spectrum_fx[n][0], 1 ); // exp: sts[ch]->hTcxEnc->spectrum_e[n]+1
		powerSpec64[ch][n * L_subframeTCX] = W_mult_32_32( mdct, mdct ); // exp: 2(sts[ch]->hTcxEnc->spectrum_e[n]+1)
		move64();

		FOR( i = 1; i < L_subframeTCX - 1; i++ )
		{
		Word32 mdst_fx = L_sub( sts[ch]->hTcxEnc->spectrum_fx[n][i + 1], sts[ch]->hTcxEnc->spectrum_fx[n][i - 1] ); /* An MDST estimate q_spec*/

		W_tmp = W_mac_32_32( W_mult_32_32( mdst_fx, mdst_fx ), sts[ch]->hTcxEnc->spectrum_fx[n][i], sts[ch]->hTcxEnc->spectrum_fx[n][i] ); /* 2q_spec+1 /
		tmp_s = W_norm( W_tmp );
		W_tmp = W_shl( W_tmp, tmp_s ); /* 2q_spec+1+tmp_s /
		powerSpec_fx[ch][( i + ( n * L_subframeTCX ) )] = W_extract_h( W_tmp ); /* 2q_spec+1+tmp_s-32 /
		tmp_q_powSpec[( i + ( n * L_subframeTCX ) )] = sub( add( imult1616( q_spec, 2 ), tmp_s ), 31 ); // Q = 2 * q_spec + 1 + tmp_s - 32
		move32();
		move16();
		mdct = L_shr( sts[ch]->hTcxEnc->spectrum_fx[n][i], 1 ); // exp: sts[ch]->hTcxEnc->spectrum_e[n]+1
		mdst = L_sub( L_shr( sts[ch]->hTcxEnc->spectrum_fx[n][i + 1], 1 ), L_shr( sts[ch]->hTcxEnc->spectrum_fx[n][i - 1], 1 ) ); // exp: sts[ch]->hTcxEnc->spectrum_e[n]+1
		powerSpec64[ch][i + n * L_subframeTCX] = W_mac_32_32( W_mult_32_32( mdct, mdct ), mdst, mdst ); // exp: 2(sts[ch]->hTcxEnc->spectrum_e[n]+1)
		move64();
		}

		W_tmp = W_mult_32_32( sts[ch]->hTcxEnc->spectrum_fx[n][L_subframeTCX - 1], sts[ch]->hTcxEnc->spectrum_fx[n][L_subframeTCX - 1] ); /* 2q_spec+1 /
		tmp_s = W_norm( W_tmp );
		W_tmp = W_shl( W_tmp, tmp_s ); /* 2q_spec+1+tmp_s /
		powerSpec_fx[ch][( ( L_subframeTCX - 1 ) + ( n * L_subframeTCX ) )] = W_extract_h( W_tmp ); /* 2q_spec+1+tmp_s-32 /
		tmp_q_powSpec[( ( L_subframeTCX - 1 ) + ( n * L_subframeTCX ) )] = sub( add( imult1616( q_spec, 2 ), tmp_s ), 31 ); // Q = 2 * q_spec + 1 + tmp_s - 32
		move32();
		mdct = L_shr( sts[ch]->hTcxEnc->spectrum_fx[n][L_subframeTCX - 1], 1 ); // exp: sts[ch]->hTcxEnc->spectrum_e[n]+1
		powerSpec64[ch][L_subframeTCX - 1 + n * L_subframeTCX] = W_mult_32_32( mdct, mdct ); // exp: 2(sts[ch]->hTcxEnc->spectrum_e[n]+1)
		move64();

		exp_powerSpec64[ch][n] = shl( add( sts[ch]->hTcxEnc->spectrum_e[n], 1 ), 1 );
		move16();
		}
		}

		/* Aligning the Q-factors */
		{
		q_powSpec[ch] = Q31;
		q_powSpecMsInv[ch] = Q31;
		move16();
		move16();
		FOR( i = 0; i < N_MAX; i++ )
		{
		IF( powerSpec_fx[ch][i] != 0 )
		{
		q_powSpec[ch] = s_min( q_powSpec[ch], tmp_q_powSpec[i] );
		move16();
		exp_powerSpec[ch][i] = sub( Q31, tmp_q_powSpec[i] );
		move16();
		}
		}
		FOR( n = 0; n < nSubframes; n++ )
		{
		FOR( i = 0; i < L_subframeTCX; i++ )
		@@ -551,16 +529,11 @@ void stereo_mdct_core_enc_fx(
		}
		}
		}

		FOR( n = 0; n < nSubframes; n++ )
		{
		FOR( i = 0; i < L_subframeTCX; i++ )
		{
		powerSpecMsInv_fx[ch][n][i] = L_shr_sat( powerSpecMsInv_fx[ch][n][i], sub( tmp_q_psi[n][i], q_powSpecMsInv[ch] ) );
		/* Here precision is preserved for powerSpec_fx buffer by storing the fixed Q copy of same buffer in powerSpec_fx_tmp buffer */
		/* powerSpec_fx implementation has separate Q for each index, powerSpec_fx_tmp has all indices in same Q beyond this point */
		powerSpec_fx_tmp[ch][( i + ( n * L_subframeTCX ) )] = L_shr( powerSpec_fx[ch][( i + ( n * L_subframeTCX ) )], sub( tmp_q_powSpec[i + ( n * L_subframeTCX )], q_powSpec[ch] ) ); /* q_powSpec */
		move32();
		move32();
		}
		}
		@@ -596,8 +569,9 @@ void stereo_mdct_core_enc_fx(
		* and quantization (0: tonal, 1: noise-like). *
		* Detect low pass if present. *
		-----------------------------------------------------------/
		ComputeSpectrumNoiseMeasure_fx( powerSpec_fx_tmp[ch], L_subframeTCX, i_mult( st->hTcxEnc->nmStartLine, idiv1616( L_subframeTCX, st->hTcxEnc->L_frameTCX ) ),
		NE_32( imult3216( st->last_sr_core, st->L_frame ), imult3216( st->sr_core, st->L_frame_past ) ) \|\| NE_16( st->last_core, TCX_20_CORE ), st->hTcxEnc->memQuantZeros, L_subframeTCX );
		ComputeSpectrumNoiseMeasure_ivas_fx( powerSpec64[ch], L_subframeTCX, i_mult( st->hTcxEnc->nmStartLine, idiv1616( L_subframeTCX, st->hTcxEnc->L_frameTCX ) ),
		NE_32( imult3216( st->last_sr_core, st->L_frame ), imult3216( st->sr_core, st->L_frame_past ) ) \|\| NE_16( st->last_core, TCX_20_CORE ),
		st->hTcxEnc->memQuantZeros, L_subframeTCX );
		}

		st->hTcxEnc->measuredBwRatio = ONE_IN_Q14; /* No bandwidth limit for the noise filling Q14*/
		@@ -630,8 +604,48 @@ void stereo_mdct_core_enc_fx(
		IF( ( NE_16( hStereoMdct->mdct_stereo_mode[n], hStereoMdct->IGFStereoMode[n] ) \|\| EQ_16( hStereoMdct->mdct_stereo_mode[n], SMDCT_BW_MS ) ) && !hStereoMdct->isSBAStereoMode )
		{
		IGF_ENC_INSTANCE_HANDLE hIGFEnc[CPE_CHANNELS];
		p_powerSpec_fx[0] = powerSpec_fx_tmp[0];
		p_powerSpec_fx[1] = powerSpec_fx_tmp[1];
		Word32 powerSpec_fx[CPE_CHANNELS][N_MAX], *p_powerSpec_fx[CPE_CHANNELS];
		Word16 q_powSpec[CPE_CHANNELS];
		p_powerSpec_fx[0] = powerSpec_fx[0];
		p_powerSpec_fx[1] = powerSpec_fx[1];
		{
		/* Copy powerSpec values from 64 bit buffer to 32 bit buffer */
		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		Word16 n1, nsub = 1;
		length = sts[ch]->hTcxEnc->L_frameTCX;
		move16();
		move16();
		IF( NE_16( sts[ch]->hTcxEnc->tcxMode, TCX_20 ) )
		{
		length = shr( sts[ch]->hTcxEnc->L_frameTCX, 1 );
		nsub = NB_DIV;
		move16();
		}
		IF( EQ_16( sts[ch]->last_core, ACELP_CORE ) )
		{
		length = add( length, shr( length, 2 ) );
		}
		exp = sub( exp_powerSpec64[ch][0], W_norm_arr( powerSpec64[ch], length ) );
		IF( EQ_16( nsub, 2 ) )
		{
		exp = s_max( exp, sub( exp_powerSpec64[ch][1], W_norm_arr( powerSpec64[ch] + length, length ) ) );
		}
		FOR( n1 = 0; n1 < nsub; n1++ )
		{
		shift1 = sub( sub( exp_powerSpec64[ch][n1], exp ), 32 );
		FOR( i = 0; i < length; i++ )
		{
		/* This doesn't result in saturation */
		powerSpec_fx[ch][i + n1 * length] = W_shl_sat_l( powerSpec64[ch][i + n1 * length], shift1 ); // exp: exp
		move32();
		}
		}
		set32_fx( powerSpec_fx[ch] + length, 0, sub( N_MAX, length ) );
		q_powSpec[ch] = sub( 31, exp ); // exp: exp
		move16();
		}
		}
		hIGFEnc[0] = sts[0]->hIGFEnc;
		hIGFEnc[1] = sts[1]->hIGFEnc;

		@@ -677,6 +691,42 @@ void stereo_mdct_core_enc_fx(
		}
		ELSE
		{
		Word32 powerSpec_fx[CPE_CHANNELS][N_MAX]; // each value has a different exponent
		Word16 exp_powerSpec[CPE_CHANNELS][N_MAX + L_MDCT_OVLP_MAX];
		{
		/* Copy powerSpec values from 64 bit buffer to 32 bit buffer */
		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		Word16 n1, nsub;
		nsub = 1;
		length = sts[ch]->hTcxEnc->L_frameTCX;
		move16();
		move16();
		IF( NE_16( sts[ch]->hTcxEnc->tcxMode, TCX_20 ) )
		{
		length = shr( sts[ch]->hTcxEnc->L_frameTCX, 1 );
		nsub = NB_DIV;
		move16();
		}
		IF( EQ_16( sts[ch]->last_core, ACELP_CORE ) )
		{
		length = add( length, shr( length, 2 ) );
		}
		FOR( n1 = 0; n1 < nsub; n1++ )
		{
		FOR( i = 0; i < length; i++ )
		{
		norm = W_norm( powerSpec64[ch][i + n1 * length] );
		powerSpec_fx[ch][i + n1 * length] = W_extract_h( W_shl( powerSpec64[ch][i + n1 * length], norm ) ); // exp = exp_powerSpec64[ch][n1]-norm
		exp_powerSpec[ch][i + n1 * length] = sub( exp_powerSpec64[ch][n1], norm );
		move32();
		move16();
		}
		}
		set32_fx( powerSpec_fx[ch] + length, 0, sub( N_MAX, length ) );
		set16_fx( exp_powerSpec[ch] + length, 0, sub( N_MAX + L_MDCT_OVLP_MAX, length ) );
		}
		}
		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		st = sts[ch];
		@@ -703,6 +753,42 @@ void stereo_mdct_core_enc_fx(
		}
		ELSE
		{
		Word32 powerSpec_fx[CPE_CHANNELS][N_MAX]; // each value has a different exponent
		Word16 exp_powerSpec[CPE_CHANNELS][N_MAX + L_MDCT_OVLP_MAX];
		{
		/* Copy powerSpec values from 64 bit buffer to 32 bit buffer */
		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		Word16 n1, nsub;
		nsub = 1;
		length = sts[ch]->hTcxEnc->L_frameTCX;
		move16();
		move16();
		IF( NE_16( sts[ch]->hTcxEnc->tcxMode, TCX_20 ) )
		{
		length = shr( sts[ch]->hTcxEnc->L_frameTCX, 1 );
		nsub = NB_DIV;
		move16();
		}
		IF( EQ_16( sts[ch]->last_core, ACELP_CORE ) )
		{
		length = add( length, shr( length, 2 ) );
		}
		FOR( n1 = 0; n1 < nsub; n1++ )
		{
		FOR( i = 0; i < length; i++ )
		{
		norm = W_norm( powerSpec64[ch][i + n1 * length] );
		powerSpec_fx[ch][i + n1 * length] = W_extract_h( W_shl( powerSpec64[ch][i + n1 * length], norm ) ); // exp = exp_powerSpec64[ch][n1]-norm
		exp_powerSpec[ch][i + n1 * length] = sub( exp_powerSpec64[ch][n1], norm );
		move32();
		move16();
		}
		}
		set32_fx( powerSpec_fx[ch] + length, 0, sub( N_MAX, length ) );
		set16_fx( exp_powerSpec[ch] + length, 0, sub( N_MAX + L_MDCT_OVLP_MAX, length ) );
		}
		}
		FOR( ch = 0; ch < CPE_CHANNELS; ch++ )
		{
		st = sts[ch];

lib_enc/prot_fx_enc.h

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