libopus_rsp.c File Reference

C-level glue for RSP ucode for Opus decoding. More...

Data Structures
struct	opus_fft_pass_t
	Description of a single pass of the FFT. More...
struct	rsp_layout_t
	Layout of samples within RSP during combfilter. More...

Macros
#define	COMPARE_MDCT_REFERENCE   0
	Compare RSP and C implementation of IMDCT.
#define	COMPARE_REFERENCE   0
	Compare RSP and C implementation of comb filter.
#define	COMPARE_REFERENCE_DUAL   0
	Compare RSP and C implementation of dual comb filter.
#define	RSP_DEEMPHASIS_COMPARE   0
	Compare RSP and C emphasis filter.

Functions
	DEFINE_RSP_UCODE (rsp_opus_dsp)
	RSP ucode for DSP functions.
	DEFINE_RSP_UCODE (rsp_opus_imdct)
	RSP ucode for IMDCT.
void	rsp_opus_init (void)
	Initialize Opus RSP acceleration.
void	rsp_opus_memmove (celt_sig *dst, celt_sig *src, opus_int32 len)
	Do a memmove with RSP to move back samples in the output buffer.
void	rsp_opus_clear (celt_sig *dst, opus_int32 len)
	Clear output buffer with RSP. Len must be in 32-bit samples (not bytes)
	DEFINE_RSP_UCODE (rsp_opus_fft_prerot)
	RSP ucode for IMDCT pre-rotation.
	DEFINE_RSP_UCODE (rsp_opus_fft_bfly2)
	RSP ucode for FFT butterfly 2.
	DEFINE_RSP_UCODE (rsp_opus_fft_bfly3)
	RSP ucode for FFT butterfly 3.
	DEFINE_RSP_UCODE (rsp_opus_fft_bfly4)
	RSP ucode for FFT butterfly 4.
	DEFINE_RSP_UCODE (rsp_opus_fft_bfly4m1)
	RSP ucode for FFT butterfly 4 (multiplicity 1)
	DEFINE_RSP_UCODE (rsp_opus_fft_bfly5)
	RSP ucode for FFT butterfly 5.
	DEFINE_RSP_UCODE (rsp_opus_fft_postrot)
	RSP ucode for IMDCT post-rotation.
void	rsp_clt_mdct_backward (const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scalar *OPUS_RESTRICT out, const opus_val16 *OPUS_RESTRICT window, int overlap, int shift, int stride, int B, int NB, int arch)
	Run a IMDCT on RSP.
void	comb_filter_const_c (opus_val32 *y, opus_val32 *x, int T, int N, opus_val16 g10, opus_val16 g11, opus_val16 g12)
	Reference implementation of comb filter.
void	rsp_opus_comb_filter_const (opus_val32 *y, opus_val32 *x, int T, int N, opus_val16 g10, opus_val16 g11, opus_val16 g12, int arch)
	Run a comb filter on the RSP.
void	rsp_opus_comb_filter_dual (opus_val32 *y, opus_val32 *x, int T0, int T1, int N, opus_val16 g00, opus_val16 g01, opus_val16 g02, opus_val16 g10, opus_val16 g11, opus_val16 g12, const opus_val16 *window)
	Run a dual comb filter on the RSP.
void	deemphasis (celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem, int accum)
	Reference implementation of the emphasis filter.
void	rsp_opus_deemphasis (celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem, int accum)
	Run the emphasis filter on teh RSP.

Detailed Description

C-level glue for RSP ucode for Opus decoding.

Author

Giovanni Bajo (giova.nosp@m.nnib.nosp@m.ajo@g.nosp@m.mail.nosp@m..com)

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Data Structure Documentation

opus_fft_pass_t

struct opus_fft_pass_t

Description of a single pass of the FFT.

Data Fields
uint16_t	consts[8][8]	Up to 8 vector constants.
uint32_t	next_pass_rdram	Pointer to next pass in RDRAM (or 0 if it's the last)
uint32_t	func_rdram	Address of the butterfly function in RDRAM (overlay)
uint32_t	stride
uint32_t	m
uint32_t	n
uint32_t	mm	Parameters for the butterfly function.

rsp_layout_t

struct rsp_layout_t

Layout of samples within RSP during combfilter.

Data Fields
int	nT0
int	nT1
int	t1_idx
bool	t1_merged
int	i_idx
bool	i_merged