Issue-24 remove LFE processing from MCT (9cf7497a) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/bitstream.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -833,12 +833,13 @@ static ivas_error write_indices_element(
		/* restore previous pointer position */
		pt_stream_loc = pt_stream_backup;
		}

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		/* TODO implemented only for MCT for now */
		if ( ( st_ivas->hEncoderConfig->ivas_format == MC_FORMAT ) && ( st_ivas->mc_mode == MC_MODE_MCT ) && ( element_id * CPE_CHANNELS + n == LFE_CHANNEL ) )
		{
		continue;
		}
		#endif
		#ifdef ENABLE_BITRATE_VERIFICATION
		total_nb_bits =
		#endif

lib_com/core_com_config.c

+28 −6

Original line number	Diff line number	Diff line
		@@ -249,14 +249,19 @@ int16_t getResq(
		int16_t getTnsAllowed(
		const int32_t total_brate, /* i : total bitrate */
		const int16_t igf, /* i : flag indicating IGF activity*/
		const int16_t element_mode, /* i : IVAS element mode */
		const int16_t element_mode /* i : IVAS element mode */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		,
		const MCT_CHAN_MODE mct_chan_mode /* i : MCT channel mode */
		#endif
		)
		{
		int16_t tnsAllowed = 0;

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		if ( mct_chan_mode != MCT_CHAN_MODE_LFE )
		{
		#endif
		if ( igf )
		{
		if ( total_brate > HQ_16k40 \|\| ( ( total_brate > HQ_13k20 ) && element_mode == IVAS_CPE_DFT ) )
		@@ -268,7 +273,9 @@ int16_t getTnsAllowed(
		{
		tnsAllowed = 1;
		}
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		}
		#endif

		return tnsAllowed;
		}
		@@ -411,16 +418,21 @@ int16_t getIgfPresent(
		const int16_t element_mode, /* i : IVAS element mode */
		const int32_t total_brate, /* i : total bitrate */
		const int16_t bwidth, /* i : audio bandwidth */
		const int16_t rf_mode, /* i : flag to signal the RF mode */
		const int16_t rf_mode /* i : flag to signal the RF mode */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		,
		const int16_t mct_chan_mode /* i : MCT channel mode */
		#endif
		)
		{
		int16_t igfPresent = 0;

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		if ( mct_chan_mode == MCT_CHAN_MODE_LFE )
		{
		return igfPresent;
		}
		#endif

		if ( bwidth == SWB )
		{
		@@ -808,8 +820,11 @@ void init_tcx_cfg(
		const int16_t infoIGFStopFreq,
		const int16_t element_mode,
		const int16_t ini_frame,
		const int16_t MCT_flag,
		const int16_t MCT_flag
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		,
		const MCT_CHAN_MODE mct_chan_mode /* i : MDCT channel mode */
		#endif
		)
		{
		int16_t i;
		@@ -840,13 +855,20 @@ void init_tcx_cfg(
		/* set number of coded lines */
		hTcxCfg->tcx_coded_lines = getNumTcxCodedLines( bwidth );

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		if ( mct_chan_mode == MCT_CHAN_MODE_LFE )
		{
		hTcxCfg->tcx_coded_lines = MCT_LFE_MAX_LINE;
		}
		#endif
		/* TNS in TCX */
		hTcxCfg->pCurrentTnsConfig = NULL;
		hTcxCfg->fIsTNSAllowed = getTnsAllowed( total_brate, igf, element_mode, mct_chan_mode );
		hTcxCfg->fIsTNSAllowed = getTnsAllowed( total_brate, igf, element_mode
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		,
		mct_chan_mode
		#endif
		);

		if ( hTcxCfg->fIsTNSAllowed )
		{

lib_com/ivas_cnst.h

+10 −2

Original line number	Diff line number	Diff line
		@@ -1277,17 +1277,25 @@ typedef enum
		#define BITRATE_MCT_RATIO_RANGE ( 1 << NBBITS_MCT_RATIO ) /* Range of the coded bitrate distribution ratio */

		#define LFE_BITS 180

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		#define MCT_LFE_MAX_LINE 24
		#endif
		#define MCT_NUM_BLOCK_DATA_BITS 4

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		typedef enum
		{
		MCT_CHAN_MODE_REGULAR,
		MCT_CHAN_MODE_LFE,
		MCT_CHAN_MODE_IGNORE
		} MCT_CHAN_MODE;

		#else
		typedef enum
		{
		MCT_CHAN_MODE_REGULAR,
		MCT_CHAN_MODE_IGNORE
		} MCT_CHAN_MODE;
		#endif

		/----------------------------------------------------------------------------------
		* Parametric MC Constants

lib_com/ivas_mct_com.c

+19 −4

Original line number	Diff line number	Diff line
		@@ -66,11 +66,13 @@ void splitAvailableBitsMCT(
		int16_t min_chan_bits[MCT_MAX_CHANNELS], min_bits_tot, remaining_bits;
		int16_t core[MCT_MAX_CHANNELS];
		MCT_CHAN_MODE mct_chan_mode[MCT_MAX_CHANNELS];
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		int16_t num_lfe;
		int16_t lfe_channel;

		num_lfe = 0;
		lfe_channel = -1;
		#endif
		min_bits_tot = 0;

		for ( i = 0; i < nchan; i++ )
		@@ -85,18 +87,23 @@ void splitAvailableBitsMCT(
		mct_chan_mode[i] = ( (Decoder_State *) sts[i] )->mct_chan_mode;
		core[i] = ( (Decoder_State *) sts[i] )->core;
		}

		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		if ( mct_chan_mode[i] == MCT_CHAN_MODE_LFE )
		{
		num_lfe++;
		lfe_channel = i;
		assert( lfe_channel == LFE_CHANNEL );
		}
		#endif
		}

		for ( i = 0; i < nchan; i++ )
		{
		if ( mct_chan_mode[i] != MCT_CHAN_MODE_LFE && mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		if (
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		mct_chan_mode[i] != MCT_CHAN_MODE_LFE &&
		#endif
		mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		{
		min_chan_bits[i] = 0;

		@@ -128,7 +135,11 @@ void splitAvailableBitsMCT(
		bits_frame_channel = &( (Decoder_State *) sts[i] )->bits_frame_channel;
		}

		if ( mct_chan_mode[i] != MCT_CHAN_MODE_LFE && mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		if (
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		mct_chan_mode[i] != MCT_CHAN_MODE_LFE &&
		#endif
		mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		{
		assert( split_ratio[i] >= 1 && split_ratio[i] < BITRATE_MCT_RATIO_RANGE );
		bits_frame_channel = split_ratio[i] remaining_bits / BITRATE_MCT_RATIO_RANGE + min_chan_bits[i];
		@@ -162,7 +173,11 @@ void splitAvailableBitsMCT(
		bits_frame_channel = &( (Decoder_State *) sts[i] )->bits_frame_channel;
		}

		if ( mct_chan_mode[i] != MCT_CHAN_MODE_LFE && mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		if (
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		mct_chan_mode[i] != MCT_CHAN_MODE_LFE &&
		#endif
		mct_chan_mode[i] != MCT_CHAN_MODE_IGNORE )
		{
		bits_frame_channel -= diff split_ratio[i] / BITRATE_MCT_RATIO_RANGE;
		bits_frame_channel = max( min_chan_bits[i], bits_frame_channel );

lib_com/ivas_prot.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -2227,7 +2227,9 @@ void decoder_tcx_imdct(
		float synthFB[],
		const int16_t bfi, /* i : Bad frame indicator */
		const int16_t frame_cnt, /* i : frame counter in the super frame */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		const int16_t isLFE, /* i : is LFE */
		#endif
		const int16_t sba_dirac_stereo_flag /* i : signal stereo output for SBA DirAC */
		);

		@@ -2792,7 +2794,9 @@ void ivas_mdct_core_whitening_enc(
		int16_t tnsSize[CPE_CHANNELS][NB_DIV], /* o : size of TNS */
		int16_t p_param[CPE_CHANNELS][NB_DIV], /* o : pointer to parameter array */
		BSTR_ENC_HANDLE hBstr, /* i/o: encoder bitstream handle */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		int16_t LFE_off, / o : flag if LFE has content */
		#endif
		const int16_t mct_on, /* i : flag mct block (1) or stereo (0) */
		const int16_t nChannels /* i : total number of coded channels */
		);
		@@ -2810,7 +2814,9 @@ void ivas_mct_core_enc(

		void ivas_mdct_quant_coder(
		CPE_ENC_HANDLE hCPE, /* i/o: Encoder CPE handle */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		const int16_t LFE_off, /* i : flag if LFE has content */
		#endif
		int16_t tnsBits[CPE_CHANNELS][NB_DIV], /* i : bits needed for TNS parameters */
		int16_t tnsSize[CPE_CHANNELS][NB_DIV], /* i : size of TNS */
		int16_t p_param[CPE_CHANNELS][NB_DIV], /* i : pointer to parameter array */
		@@ -2861,7 +2867,9 @@ void ivas_mdct_dec_side_bits_frame_channel(
		int16_t param_lpc[MCT_MAX_CHANNELS][NPRM_LPC_NEW], /* o : lpc_parameters */
		int16_t p_param[CPE_CHANNELS][NB_DIV], /* o : pointer to param buffer */
		Decoder_State st0, / i : pointer to bitstream handle */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		int16_t LFE_off, / o : flag if LFE has content */
		#endif
		int16_t nTnsBitsTCX10[CPE_CHANNELS][NB_DIV], /* o : number of bits for TNS */
		int16_t param[CPE_CHANNELS][DEC_NPRM_DIV * NB_DIV], /* i/o: parameters buffer */
		const int16_t MCT_flag, /* i : hMCT handle allocated (1) or not (0) */
		@@ -2881,7 +2889,9 @@ void ivas_mct_side_bits(

		void ivas_mdct_core_invQ(
		CPE_DEC_HANDLE hCPE, /* i/o: CPE handle */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		const int16_t LFE_off, /* i : flag if LFE content */
		#endif
		int16_t nTnsBitsTCX10[CPE_CHANNELS][NB_DIV], /* i : number of TNS bits */
		int16_t p_param[CPE_CHANNELS][NB_DIV], /* i : pointer to param buffer */
		int16_t param_lpc[CPE_CHANNELS][NPRM_LPC_NEW], /* i : lpc parameters */
		@@ -2899,14 +2909,18 @@ void ivas_mdct_core_reconstruct(
		CPE_DEC_HANDLE hCPE, /* i/o: CPE decoder structure */
		float x[][NB_DIV], / i/o: pointers to synthesis @internal_FS */
		float signal_outFB[CPE_CHANNELS][L_FRAME_PLUS], /* o : synthesis @output_FS */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		const int16_t LFE_off, /* i : flag if LFE content */
		#endif
		int16_t fUseTns[CPE_CHANNELS][NB_DIV], /* i : flage TNS enabled */
		const int16_t MCT_flag /* i : hMCT handle allocated (1) or not (0) */
		);

		void ivas_mdct_core_tns_ns(
		CPE_DEC_HANDLE hCPE, /* i/o: CPE decoder structure */
		#ifndef ISSUE_24_CLEANUP_MCT_LFE
		const int16_t LFE_off, /* i : flag if LFE has content */
		#endif
		int16_t fUseTns[CPE_CHANNELS][NB_DIV], /* i : two entries for each channel in TCX10 */
		STnsData tnsData[CPE_CHANNELS][NB_DIV], /* o : TNS parameter */
		float x[CPE_CHANNELS][NB_DIV], / o : synthesis @internal_FS */