Added SWB TBE target fix under FIX_I102_SWB_TBE_SWITCH (c7f9fef4) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/options.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -149,6 +149,7 @@
		#define SPAR_SCALING_HARMONIZATION /* Issue 80: Changes to harmonize scaling in spar */

		#define SBA_INTERN_CONFIG_FIX_HOA2 /* Issue 99 : Fix for incorrect internal_config when output format is HOA2 or FOA*/
		//#define FIX_I102_SWB_TBE_SWITCH /* Issue 102: avoid IO->SWB switching code for IVAS, generate SHB ACB mem with lerp in case of switch */

		/* ################## End DEVELOPMENT switches ######################### */
		/* clang-format on */

lib_dec/acelp_core_dec.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -701,7 +701,14 @@ ivas_error acelp_core_dec(
		mvr2r( old_exc_s + st->L_frame - M, st->mem_syn2, M );
		residu( Aq, M, old_exc_s, old_exc + L_EXC_MEM_DEC - st->L_frame, st->L_frame );
		}
		#ifdef FIX_I102_SWB_TBE_SWITCH
		if ( st->last_core != ACELP_CORE && st->element_mode > EVS_MONO )
		{
		/* Prepare ACB memory of old_bwe_exc */
		lerp( old_exc, old_bwe_exc, L_EXC_MEM_DEC * HIBND_ACB_L_FAC, L_EXC_MEM_DEC );

		}
		#endif
		/-----------------------------------------------------------------
		* FEC - first good frame after lost frame(s) (possibility to correct the ACB)
		-----------------------------------------------------------------/

lib_enc/acelp_core_enc.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -472,6 +472,13 @@ ivas_error acelp_core_enc(
		mvr2r( hLPDmem->old_exc + st->L_frame - M, hLPDmem->mem_syn, M );
		residu( Aq, M, hLPDmem->old_exc, old_exc, st->L_frame );
		}
		#ifdef FIX_I102_SWB_TBE_SWITCH
		if ( st->last_core != ACELP_CORE && st->element_mode > EVS_MONO )
		{
		/* Prepare ACB memory of old_bwe_exc */
		lerp( old_exc, old_bwe_exc, L_EXC_MEM_DEC * HIBND_ACB_L_FAC, L_EXC_MEM_DEC );
		}
		#endif

		/---------------------------------------------------------------
		* Calculation of LP residual (filtering through A[z] filter)

lib_enc/swb_pre_proc.c

+57 −14

Original line number	Diff line number	Diff line
		@@ -288,6 +288,10 @@ void swb_pre_proc(
		int32_t inner_Fs, input_Fs;
		float old_input[NS2SA( 48000, DELAY_FD_BWE_ENC_NS + DELAY_FIR_RESAMPL_NS ) + L_FRAME48k];
		float spchTmp[640];
		#ifdef FIX_I102_SWB_TBE_SWITCH
		float spchTmp2[640];
		int16_t L_resamp;
		#endif
		int16_t i, j;
		int16_t startB, endB;
		float *realBufferFlipped[CLDFB_NO_COL_MAX];
		@@ -677,6 +681,7 @@ void swb_pre_proc(
		}
		else
		{
		#ifndef FIX_I102_SWB_TBE_SWITCH
		if ( st->bwidth == FB \|\| st->core == ACELP_CORE \|\| ( st->element_mode == IVAS_CPE_DFT && input_Fs == 48000 ) )
		{
		set_f( hBWE_TD->old_speech_shb, 0, L_LOOK_16k + L_SUBFR16k );
		@@ -697,6 +702,31 @@ void swb_pre_proc(
		}
		else
		{
		#else
		if ( st->L_frame == L_FRAME )
		{
		L_resamp = 560; /* 6.4 kHz core -> 6 - 14 kHz band target -> 560 samples in 28 kHz sample rate */
		}
		else
		{
		L_resamp = 620; /* 8 kHz core -> 7.5 - 15.5 kHz band target -> 620 samples in 31 kHz sample rate */
		}

		/* Dirty downsampling to match Nyquist to upper frequency limit of target */
		lerp( st->input, new_swb_speech, L_resamp, (int16_t) ( input_Fs / 50 ) );

		/* flip the spectrum */
		mvr2r( new_swb_speech, spchTmp, L_resamp );
		for ( i = 0; i < L_resamp; i = i + 2 )
		{
		spchTmp[i] = -spchTmp[i];
		}

		/* Dirty upsampling to match Nyquist to lower frequency limit of target (reversed spectrum)*/
		lerp( spchTmp, spchTmp2, L_FRAME32k, L_resamp );
		mvr2r( spchTmp2, spchTmp, L_FRAME32k );
		#endif
		#ifndef FIX_I102_SWB_TBE_SWITCH
		/* flip the spectrm */
		mvr2r( new_swb_speech, spchTmp, L_FRAME32k );

		@@ -704,8 +734,9 @@ void swb_pre_proc(
		{
		spchTmp[i] = -spchTmp[i];
		}

		#endif
		Decimate_allpass_steep( spchTmp, hBWE_TD->state_ana_filt_shb, L_FRAME32k, shb_speech );

		mvr2r( shb_speech + L_FRAME16k - ( L_LOOK_16k + L_SUBFR16k ), hBWE_TD->old_speech_shb, L_LOOK_16k + L_SUBFR16k );

		/Compute the past overlap for potential next iDFTs SHB/
		@@ -716,20 +747,32 @@ void swb_pre_proc(
		hCPE->hStereoDft->output_mem_dmx_16k_shb[i] = shb_speech[20 + i] * hCPE->hStereoDft->win_ana_16k[STEREO_DFT_OVL_16k - 1 - i] * hCPE->hStereoDft->win_ana_16k[STEREO_DFT_OVL_16k - 1 - i];
		}
		}
		#ifndef FIX_I102_SWB_TBE_SWITCH
		}
		#endif

		if ( st->element_mode != IVAS_CPE_DFT )
		{
		/* Reset CLDFB synthesis buffer */
		set_f( st->cldfbSynTd->cldfb_state, 0.0f, st->cldfbSynTd->p_filter_length );
		}
		#ifdef FIX_I102_SWB_TBE_SWITCH
		else
		{
		hCPE->hStereoDft->flip_sign = -hCPE->hStereoDft->flip_sign; /* Make sure sign is updated even if DFT SHB target is not generated */
		}
		#endif
		}

		/* Memory reset to compensate for 0.9375 ms offset when transitioning from IO to SWB */
		/* When switching from n >1 to n = 1, we keep the enc/dec delay as 8.75/3.25 and below code not needed;
		only when n = 1 start, it will be 9.6875/2.3125 in that case this reset is needed for IO->BWE.*/
		#ifdef FIX_I102_SWB_TBE_SWITCH
		if ( st->last_extl == -1 && st->element_mode == EVS_MONO )
		#else
		/* IVAS_fmToDo: revisit for IVAS (the condition is currently entered for both TD and DFT stereo - is it desirable?) */
		if ( st->last_extl == -1 )
		#endif
		{
		delay = NS2SA( input_Fs, DELAY_FIR_RESAMPL_NS );
		for ( i = 0; i < delay; i++ )