Merge branch 'FhG/b20220810_lbr_SBA_core_coder_tuning' into 'main' (edc72906) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/ivas_prot.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -2155,6 +2155,9 @@ void stereo_mdct_core_dec(
		void splitAvailableBits(
		const int16_t total_bits, /* i : total available bits for TCX coding */
		const int16_t split_ratio, /* i : split ratio */
		#ifdef LBR_SBA_CORE_CODING_TUNING
		const int16_t isSBAStereoMode, /* i : signal core coding for sba */
		#endif
		int16_t bits_ch0, / o : bits for channel 0 */
		int16_t bits_ch1 / o : bits for channel 1 */
		);
		@@ -2172,6 +2175,9 @@ void parse_stereo_from_bitstream(
		STEREO_MDCT_DEC_DATA_HANDLE hStereoMdct, /* i/o: MDCT stereo decoder structure */
		Decoder_State *sts, / i/o: decoder state structure */
		const int16_t mct_on, /* i : flag mct block (1) or stereo (0) */
		#ifdef LBR_SBA_CORE_CODING_TUNING
		const int16_t isSBAStereoMode, /* i: flag core coding for sba */
		#endif
		Decoder_State st0, / i/o: decoder state structure for Bstr */
		int16_t ms_mask[NB_DIV][MAX_SFB] /* o : bandwise MS mask */
		);
		@@ -2507,6 +2513,11 @@ ivas_error stereo_memory_enc(
		const int16_t max_bwidth, /* i : maximum audio bandwidth */
		float tdm_last_ratio, / o : TD stereo last ratio */
		const IVAS_FORMAT ivas_format /* i : IVAS format */
		#ifdef LBR_SBA_CORE_CODING_TUNING
		,
		const int16_t nchan_transport /* i : number transport chans */
		#endif

		);

		ivas_error stereo_memory_dec(
		@@ -3002,7 +3013,11 @@ void ivas_dirac_param_est_enc(
		----------------------------------------------------------------------------------/

		/! r: SBA format mode /
		#ifdef LBR_SBA_CORE_CODING_TUNING
		SBA_MODE ivas_sba_mode_select(
		#else
		int16_t ivas_sba_mode_select(
		#endif
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		);

lib_com/ivas_sba_config.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -54,7 +54,7 @@
		-------------------------------------------------------------------/

		/! r: SBA format mode /
		int16_t ivas_sba_mode_select(
		SBA_MODE ivas_sba_mode_select(
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		)
		{

lib_com/ivas_stereo_mdct_stereo_com.c

+15 −5

Original line number	Diff line number	Diff line
		@@ -46,6 +46,9 @@
		void splitAvailableBits(
		const int16_t total_bits, /* i : total available bits for TCX coding */
		const int16_t split_ratio, /* i : split ratio */
		#ifdef LBR_SBA_CORE_CODING_TUNING
		const int16_t isSBAStereoMode, /* i : signal core coding for sba */
		#endif
		int16_t bits_ch0, / o : bits for channel 0 */
		int16_t bits_ch1 / o : bits for channel 1 */
		)
		@@ -53,7 +56,14 @@ void splitAvailableBits(
		assert( split_ratio >= 1 && split_ratio < SMDCT_BITRATE_RATIO_RANGE );

		bits_ch0 = split_ratio total_bits / SMDCT_BITRATE_RATIO_RANGE;
		bits_ch1 = total_bits + 0 - bits_ch0;
		#ifdef LBR_SBA_CORE_CODING_TUNING
		/* for SBA mode bias the distribution towards the W channel */
		if ( split_ratio < 7 && isSBAStereoMode )
		{
		bits_ch0 += (int16_t) ( 0.2 *bits_ch0 );
		}
		#endif
		bits_ch1 = total_bits - bits_ch0;

		return;
		}

lib_com/options.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -147,6 +147,7 @@
		/#define FIX_I1_113/ /* under review : MCT bit distribution optimization for SBA high bitrates*/


		#define LBR_SBA_CORE_CODING_TUNING /* Contribution "3 Core Coder Tuning for low bitrate SBA with 2 TCs" */

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

lib_dec/ivas_cpe_dec.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -361,6 +361,7 @@ ivas_error ivas_cpe_dec(

		if ( hCPE->element_mode != IVAS_CPE_DFT \|\| ( hCPE->nchan_out == 1 && hCPE->hStereoDft->hConfig->res_cod_mode == STEREO_DFT_RES_COD_OFF ) )
		{
		#ifndef LBR_SBA_CORE_CODING_TUNING
		if ( st_ivas->renderer_type == RENDERER_MC_PARAMMC && ( st_ivas->hDecoderConfig->output_config == AUDIO_CONFIG_MONO \|\| st_ivas->hDecoderConfig->output_config == AUDIO_CONFIG_STEREO ) )
		{
		if ( ( error = ivas_core_dec( st_ivas, NULL, hCPE, st_ivas->hMCT, n_channels, output, outputHB, NULL, 0 ) ) != IVAS_ERR_OK )
		@@ -375,6 +376,12 @@ ivas_error ivas_cpe_dec(
		return error;
		}
		}
		#else
		if ( ( error = ivas_core_dec( st_ivas, NULL, hCPE, st_ivas->hMCT, n_channels, output, outputHB, NULL, 0 ) ) != IVAS_ERR_OK )
		{
		return error;
		}
		#endif
		}

		if ( st_ivas->hMCT )