Functions in ivas_ism_metadata_dec.c file converted (ceb63d2b) · Commits · SA4 / Audio / IVAS BASOP

lib_com/ivas_cnst.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -313,6 +313,8 @@ typedef enum
		#define ISM_AZIMUTH_NBITS 7
		#define ISM_AZIMUTH_MIN -180.0f
		#define ISM_AZIMUTH_MAX 180.0f
		#define ISM_AZIMUTH_MIN_FX -754974720
		#define ISM_AZIMUTH_MAX_FX 754974720
		#define ISM_AZIMUTH_LOW_BORDER -140.0f
		#define ISM_AZIMUTH_HIGH_BORDER 135.0f

		@@ -351,10 +353,14 @@ typedef enum
		#define ISM_DTX_ELE_BITS_HIGH 7
		#define ISM_Q_STEP_HIGH (ISM_Q_STEP / 2)
		#define ISM_Q_STEP_BORDER_HIGH (ISM_Q_STEP_BORDER / 2)
		#define ISM_Q_STEP_HIGH_FX 5 * (1 << (22-2))
		#define ISM_Q_STEP_BORDER_HIGH_FX 5 * (1 << (22-1))
		#define ISM_DTX_AZI_BITS_LOW 6
		#define ISM_DTX_ELE_BITS_LOW 5
		#define ISM_Q_STEP_LOW (ISM_Q_STEP * 2)
		#define ISM_Q_STEP_BORDER_LOW (ISM_Q_STEP_BORDER * 2)
		#define ISM_Q_STEP_LOW_FX 5 * (1 << 22)
		#define ISM_Q_STEP_BORDER_LOW_FX 10 * (1 << 22)

		/* ISM modes */
		typedef enum

lib_com/ivas_ism_com.c

+81 −0

Original line number	Diff line number	Diff line
		@@ -390,11 +390,20 @@ void ivas_ism_reset_metadata(
		ISM_METADATA_HANDLE hIsmMeta /* i/o: ISM metadata handle */
		)
		{
		#ifdef IVAS_FLOAT_FIXED
		hIsmMeta->azimuth_fx = 0;
		hIsmMeta->elevation_fx = 0;
		hIsmMeta->yaw_fx = 0;
		hIsmMeta->pitch_fx = 0;
		hIsmMeta->radius_fx = 1 << 9;
		#endif
		// To be removed later /////////////////////
		hIsmMeta->azimuth = 0.0f;
		hIsmMeta->elevation = 0.0f;
		hIsmMeta->yaw = 0.0f;
		hIsmMeta->pitch = 0.0f;
		hIsmMeta->radius = 1.0f;
		////////////////////////////////////////////
		hIsmMeta->ism_metadata_flag = 0;
		hIsmMeta->non_diegetic_flag = 0;

		@@ -470,6 +479,43 @@ int16_t ism_quant_meta(
		-------------------------------------------------------------------/

		/! r: dequantized value /
		#ifdef IVAS_FLOAT_FIXED
		Word32 ism_dequant_meta_fx(
		const Word16 idx, /* i : quantizer index */
		const Word32 borders_fx[], /* i : level borders */
		const Word32 q_step_fx, /* i : quantization step */
		const Word32 q_step_border_fx, /* i : quantization step at the border */
		const Word16 cbsize /* i : codebook size */
		)
		{
		Word16 idx_start;
		Word32 qlow_fx, step_fx, valQ_fx;

		IF ( idx <= L_shr(L_sub( borders_fx[1], borders_fx[0] ), 21) / L_shr(q_step_border_fx, 21) )
		{
		qlow_fx = borders_fx[0];
		idx_start = 0;
		step_fx = q_step_border_fx;
		}
		ELSE IF ( idx <= cbsize - 1 - L_shr( L_sub( borders_fx[3], borders_fx[2] ), 21) / L_shr(q_step_border_fx, 21) )
		{
		qlow_fx = borders_fx[1];
		idx_start = (Word16) ( L_shr( L_sub( borders_fx[1], borders_fx[0] ), 21) / L_shr(q_step_border_fx , 21));
		step_fx = q_step_fx;
		}
		ELSE
		{
		qlow_fx = borders_fx[2];
		idx_start = (Word16) ( cbsize - 1 - L_shr(L_sub( borders_fx[3], borders_fx[2] ), 21) / L_shr(q_step_border_fx, 21) );
		step_fx = q_step_border_fx;
		}

		valQ_fx = sub( idx, idx_start ) * step_fx + qlow_fx;

		return valQ_fx;
		}
		#endif

		float ism_dequant_meta(
		const int16_t idx, /* i : quantizer index */
		const float borders[], /* i : level borders */
		@@ -618,6 +664,10 @@ void update_last_metadata(
		{
		if ( updt_flag[ch] == 1 )
		{
		#ifdef IVAS_FLOAT_FIXED
		hIsmMeta[ch]->last_azimuth_fx = hIsmMeta[ch]->azimuth_fx;
		hIsmMeta[ch]->last_elevation_fx = hIsmMeta[ch]->elevation_fx;
		#endif
		hIsmMeta[ch]->last_azimuth = hIsmMeta[ch]->azimuth;
		hIsmMeta[ch]->last_elevation = hIsmMeta[ch]->elevation;
		}
		@@ -633,6 +683,37 @@ void update_last_metadata(
		* Set quantization bits based on the number of coded objects
		----------------------------------------------------------------/

		#ifdef IVAS_FLOAT_FIXED
		void ivas_get_ism_sid_quan_bitbudget_fx(
		const Word16 nchan_ism, /* i : number of objects */
		Word16 nBits_azimuth, / o : number of Q bits for azimuth */
		Word16 nBits_elevation, / o : number of Q bits for elevation */
		Word32 q_step_fx, / o : quantization step */
		Word32 q_step_border_fx, / o : quantization step at the border */
		Word16 nBits_coh, / o : number of Q bits for coherence */
		Word16 nBits_sce_id / o : number of Q bits for sce_id_dtx */
		)
		{
		*nBits_azimuth = ISM_DTX_AZI_BITS_HIGH;
		*nBits_elevation = ISM_DTX_ELE_BITS_HIGH;
		*q_step_fx = ISM_Q_STEP_HIGH_FX;
		*q_step_border_fx = ISM_Q_STEP_BORDER_HIGH_FX;
		*nBits_coh = ISM_DTX_COH_SCA_BITS;
		*nBits_sce_id = 1;

		IF ( nchan_ism >= 3 )
		{
		*nBits_azimuth = ISM_DTX_AZI_BITS_LOW;
		*nBits_elevation = ISM_DTX_ELE_BITS_LOW;
		*q_step_fx = ISM_Q_STEP_LOW_FX;
		*q_step_border_fx = ISM_Q_STEP_BORDER_LOW_FX;
		*nBits_sce_id = 2;
		}

		return;
		}
		#endif

		void ivas_get_ism_sid_quan_bitbudget(
		const int16_t nchan_ism, /* i : number of objects */
		int16_t nBits_azimuth, / o : number of Q bits for azimuth */

lib_com/ivas_prot_fx.h

+38 −0

Original line number	Diff line number	Diff line
		@@ -373,4 +373,42 @@ Word16 masa_sq_fx(
		const Word16 cb_sz /* i : codebook size */
		);

		ivas_error ivas_ism_metadata_dec_fx(
		const Word32 ism_total_brate, /* i : ISM total bitrate */
		const Word16 nchan_ism, /* i : number of ISM channels */
		Word16 nchan_transport, / o : number of transport channels */
		ISM_METADATA_HANDLE hIsmMeta[], /* i/o: ISM metadata handles */
		SCE_DEC_HANDLE hSCE[], /* i/o: SCE decoder handles */
		const Word16 bfi, /* i : bfi flag */
		Word16 nb_bits_metadata[], /* o : number of metadata bits */
		ISM_MODE ism_mode, /* i : ISM mode */
		ISM_DTX_DATA_DEC hISMDTX, /* i/o: ISM DTX structure */
		const PARAM_ISM_CONFIG_HANDLE hParamIsm, /* i : Param ISM Config Handle */
		Word16 ism_extmeta_active, / i/o: Extended metadata active in renderer */
		Word16 ism_extmeta_cnt, / i/o: Number of change frames observed */
		DEC_CORE_HANDLE st0 /* i : core-coder handle */
		);

		void ivas_get_ism_sid_quan_bitbudget_fx(
		const Word16 nchan_ism, /* i : number of objects */
		Word16 nBits_azimuth, / o : number of Q bits for azimuth */
		Word16 nBits_elevation, / o : number of Q bits for elevation */
		Word32 q_step_fx, / o : quantization step */
		Word32 q_step_border_fx, / o : quantization step at the border */
		Word16 nBits_coh, / o : number of Q bits for coherence */
		Word16 nBits_sce_id / o : number of Q bits for sce_id_dtx */
		);

		void ivas_ism_metadata_sid_dec_fx(
		SCE_DEC_HANDLE hSCE[MAX_SCE], /* i/o: SCE decoder structure */
		const Word32 ism_total_brate, /* i : ISM total bitrate */
		const Word16 bfi, /* i : bfi flag */
		const Word16 nchan_ism, /* i : number of objects */
		const Word16 nchan_transport, /* i : number of transport channels*/
		const ISM_MODE ism_mode, /* i : ISM mode */
		Word16 flag_noisy_speech, / o : noisy speech flag */
		Word16 sce_id_dtx, / o : SCE DTX ID */
		ISM_METADATA_HANDLE hIsmMeta[], /* i/o: ISM metadata handles */
		Word16 nb_bits_metadata[] /* o : number of metadata bits */
		);
		#endif
		No newline at end of file

lib_com/ivas_rom_com_fx.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -282,4 +282,14 @@ const Word16 ivas_divde_255[256] = {
		30968, 31097, 31225, 31354, 31482, 31611, 31739, 31868,
		31996, 32125, 32253, 32382, 32510, 32639, 32767
		};

		const Word32 ism_azimuth_borders_fx[4] =
		{
		-754974720, -587202560, 566231040, 754974720
		};

		const Word32 ism_elevation_borders_fx[4] =
		{
		-377487360, -293601280, 272639760, 377487360
		};
		/* clang-format on */

lib_com/ivas_rom_com_fx.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -54,4 +54,7 @@ extern const Word16 dft_trigo_48k_fx[STEREO_DFT_N_MAX_ENC / 4 + 1];

		extern const Word16 ivas_divde_255[256];

		extern const Word32 ism_azimuth_borders_fx[4];
		extern const Word32 ism_elevation_borders_fx[4];

		#endif
		No newline at end of file