Fix for EVS Bitexactness issue (9891182d) · Commits · SA4 / Audio / IVAS BASOP

lib_enc/ivas_core_pre_proc_front_fx.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1425,7 +1425,7 @@ ivas_error pre_proc_front_ivas_fx(
		* TC frame selection
		-----------------------------------------------------------------/

		st->clas = signal_clas_fx( st, inp_12k8_fx, ee_fx, relE_fx, L_look, tdm_SM_last_clas ); / Q0 */
		st->clas = signal_clas_ivas_fx( st, inp_12k8_fx, ee_fx, relE_fx, L_look, tdm_SM_last_clas ); / Q0 */
		move16();

		select_TC_fx( MODE1, st->tc_cnt, &st->coder_type, st->localVAD );

lib_enc/prot_fx_enc.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -570,6 +570,15 @@ Word16 signal_clas_fx( /* o : classification for current
		Word16 uc_clas / o : temporary classification used in music/speech class*/
		);

		Word16 signal_clas_ivas_fx( /* o : classification for current frames */
		Encoder_State st, / i/o: encoder state structure */
		const Word16 speech, / i : pointer to speech signal for E computation */
		const Word32 ee, / i : lf/hf E ration for 2 half-frames */
		const Word16 relE, /* i : frame relative E to the long term average */
		const Word16 L_look, /* i : look-ahead */
		Word16 uc_clas / o : temporary classification used in music/speech class*/
		);

		void speech_music_classif_fx(
		Encoder_State st, / i/o: state structure */
		const Word16 new_inp, / i : new input signal */

lib_enc/sig_clas_fx.c

+231 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,236 @@ Word16 signal_clas_fx( /* o : classification for current
		const Word16 L_look, /* i : look-ahead */
		Word16 clas_mod / o : class flag for NOOP detection */
		)
		{
		Word32 Ltmp;
		Word16 mean_voi2, een, corn, zcn, relEn, pcn, fmerit1;
		Word16 i, clas, pc, zc, lo, lo2, hi, hi2, exp_ee, frac_ee;
		Word16 tmp16, tmpS;
		const Word16 *pt1;
		#ifdef BASOP_NOGLOB_DECLARE_LOCAL
		Flag Overflow = 0;
		move32();
		#endif

		/----------------------------------------------------------------
		* Calculate average voicing
		* Calculate average spectral tilt
		* Calculate zero-crossing rate
		* Calculate pitch stability
		----------------------------------------------------------------/

		/* average voicing on second half-frame and look-ahead */
		Ltmp = L_mult( st->voicing_fx[1], 16384 ); /* Q15Q14->Q30 /
		mean_voi2 = mac_r( Ltmp, st->voicing_fx[2], 16384 );

		/* average spectral tilt in dB */
		lo = L_Extract_lc( ee[0], &hi );
		lo2 = L_Extract_lc( ee[1], &hi2 );
		Ltmp = L_mult( lo, lo2 ); /* Q5Q5->Q11 /

		test();
		test();
		IF( LT_32( Ltmp, 2048 ) )
		{
		een = 0;
		move16();
		}
		ELSE IF( GT_32( Ltmp, THRES_EEN ) \|\| hi > 0 \|\| hi2 > 0 )
		{
		een = 512;
		move16();
		}
		ELSE
		{
		/* mean_ee2 = 0.5f * 20.0f * (float)log10( tmp ); */
		/* een = K_EE_ENC * mean_ee2 + C_EE_ENC; */
		exp_ee = norm_l( Ltmp );
		frac_ee = Log2_norm_lc( L_shl( Ltmp, exp_ee ) );
		exp_ee = sub( 30 - 11, exp_ee );
		Ltmp = Mpy_32_16( exp_ee, frac_ee, LG10 ); /* Ltmp Q14 */
		een = round_fx( L_shl( Ltmp, 16 - 5 ) ); /* Q14 -> Q9 */
		een = mac_r( C_EE_FX, een, K_EE_FX );
		}
		/* compute zero crossing rate */
		pt1 = speech + sub( L_look, 1 );
		tmpS = shr( pt1, 15 ); / sets 'tmpS to -1 if pt1 < 0 /
		Ltmp = L_deposit_l( 0 );
		FOR( i = 0; i < L_FRAME; i++ )
		{
		tmp16 = add( 1, tmpS );
		pt1++;
		tmpS = shr( pt1, 15 ); / pt1 >=0 ---> 0 OTHERWISE -1 */
		Ltmp = L_msu0( Ltmp, tmpS, tmp16 );
		}
		zc = extract_l( Ltmp );

		/* compute pitch stability */
		pc = add( abs_s( sub( st->pitch[1], st->pitch[0] ) ), abs_s( sub( st->pitch[2], st->pitch[1] ) ) );
		st->tdm_pc = pc;
		move16();
		/-----------------------------------------------------------------
		* Transform parameters to the range <0:1>
		* Compute the merit function
		-----------------------------------------------------------------/

		/* corn = K_COR * mean_voi2 + C_COR */
		Ltmp = L_mult( C_COR_FX, 32767 );
		corn = round_fx( L_shl( L_mac( Ltmp, mean_voi2, K_COR_FX ), -4 ) ); /Q13+Q13Q15 =>Q13->Q9*/
		/* Limit [0, 1] */
		corn = s_max( corn, 0 );
		corn = s_min( corn, 512 );

		Ltmp = L_mult( C_ZC_FX, 4 ); /Q13Q2 -> Q16*/
		zcn = round_fx( L_shl( L_mac( Ltmp, zc, K_ZC_FX ), 16 - 7 ) ); /Q0Q15 + Q16*/
		/* Limit [0, 1] */
		zcn = s_max( zcn, 0 );
		zcn = s_min( zcn, 512 );

		Ltmp = L_mult( C_RELE_FX, 256 ); /Q15Q8 ->Q24*/
		relEn = round_fx( L_shl( L_mac( Ltmp, relE, K_RELE_FX ), 1 ) ); /relE in Q8 but relEn in Q9/
		/* Limit [0.5, 1] */
		relEn = s_max( relEn, 256 );
		relEn = s_min( relEn, 512 );

		Ltmp = L_mult( C_PC_FX, 2 ); /Q14Q1 -> Q16*/
		pcn = round_fx( L_shl( L_mac( Ltmp, pc, K_PC_FX ), 16 - 7 ) ); /Q16 + Q0Q15*/
		/* Limit [0, 1] */
		pcn = s_max( pcn, 0 );
		pcn = s_min( pcn, 512 );

		Ltmp = L_mult( een, 10923 );
		Ltmp = L_mac( Ltmp, corn, 21845 );
		Ltmp = L_mac( Ltmp, zcn, 10923 );
		Ltmp = L_mac( Ltmp, relEn, 10923 );
		Ltmp = L_mac( Ltmp, pcn, 10923 );

		fmerit1 = round_fx_o( L_shl_o( Ltmp, 16 - 10 - 1, &Overflow ), &Overflow ); /* fmerit1 ->Q15 */

		/-----------------------------------------------------------------
		* FEC classification
		-----------------------------------------------------------------/

		st->fmerit_dt = sub( st->prev_fmerit, fmerit1 ); /Q15/
		move16();
		st->prev_fmerit = fmerit1;
		move16();

		/* FEC classification */
		test();
		test();
		IF( st->localVAD == 0 \|\| EQ_16( st->coder_type, UNVOICED ) \|\| LT_16( relE, -1536 ) )
		{
		clas = UNVOICED_CLAS;
		*clas_mod = clas;
		move16();
		move16();
		}
		ELSE
		{
		SWITCH( st->last_clas )
		{
		case VOICED_CLAS:
		case ONSET:
		case VOICED_TRANSITION:

		IF( LT_16( fmerit1, 16056 ) ) /0.49f/
		{
		clas = UNVOICED_CLAS;
		move16();
		}
		ELSE IF( LT_16( fmerit1, 21626 ) ) /0.66/
		{
		clas = VOICED_TRANSITION;
		move16();
		}
		ELSE
		{
		clas = VOICED_CLAS;
		move16();
		}
		IF( LT_16( fmerit1, 14745 /* 0.45f*/ ) )
		{
		*clas_mod = UNVOICED_CLAS;
		move16();
		}
		ELSE IF( LT_16( fmerit1, 21626 /* 0.66f*/ ) )
		{
		*clas_mod = VOICED_TRANSITION;
		move16();
		}
		ELSE
		{
		*clas_mod = VOICED_CLAS;
		move16();
		}
		BREAK;

		case UNVOICED_CLAS:
		case UNVOICED_TRANSITION:
		IF( GT_16( fmerit1, 20643 ) ) /0.63/
		{
		clas = ONSET;
		move16();
		}
		ELSE IF( GT_16( fmerit1, 19169 ) ) /0.585/
		{
		clas = UNVOICED_TRANSITION;
		move16();
		}
		ELSE
		{
		clas = UNVOICED_CLAS;
		move16();
		}
		*clas_mod = clas;
		move16();

		BREAK;

		default:
		clas = UNVOICED_CLAS;
		*clas_mod = clas;
		move16();
		move16();
		BREAK;
		}
		}
		/* Onset classification */

		/* tc_cnt == -1: frame after TC frame in continuous block of GC/VC frames */
		/* tc_cnt == 0: UC frame */
		/* tc_cnt == 1: onset/transition frame, coded by GC coder type */
		/* tc_cnt == 2: frame after onset/transition frame, coded by TC coder type */

		if ( clas == 0 )
		{
		st->tc_cnt = 0;
		move16();
		}

		test();
		IF( GE_16( clas, VOICED_TRANSITION ) && st->tc_cnt >= 0 )
		{
		st->tc_cnt = add( st->tc_cnt, 1 );
		move16();
		}

		if ( GT_16( st->tc_cnt, 2 ) )
		{
		st->tc_cnt = -1;
		move16();
		}
		return clas;
		}

		Word16 signal_clas_ivas_fx( /* o : classification for current frames */
		Encoder_State st, / i/o: encoder state structure */
		const Word16 speech, / i : pointer to speech signal for E computation in Qx */
		const Word32 ee, / i : lf/hf E ration for 2 half-frames in Q6 */
		const Word16 relE, /* i : frame relative E to the long term average in Q8 */
		const Word16 L_look, /* i : look-ahead */
		Word16 clas_mod / o : class flag for NOOP detection */
		)
		{
		Word32 Ltmp;
		Word16 mean_voi2, een, corn, zcn, relEn, pcn, fmerit1;
		@@ -273,6 +503,7 @@ Word16 signal_clas_fx( /* o : classification for current
		}
		return clas;
		}

		/-------------------------------------------------------------------
		* select_TC_fx()
		*

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