synth.c File Reference

Implements the mad_synth methods, to perform PCM synthesis. More...

#include "global.h"
#include "fixed.h"
#include "frame.h"
#include "synth.h"
#include "D.dat"

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Go to the source code of this file.

Defines

#define SHIFT(x)   (x)

FPM_DEFAULT without OPT_SSO will actually lose accuracy and performance.

#define MUL(x, y)   mad_f_mul((x), (y))

#define costab1   MAD_F(0x0ffb10f2)

#define costab2   MAD_F(0x0fec46d2)

#define costab3   MAD_F(0x0fd3aac0)

#define costab4   MAD_F(0x0fb14be8)

#define costab5   MAD_F(0x0f853f7e)

#define costab6   MAD_F(0x0f4fa0ab)

#define costab7   MAD_F(0x0f109082)

#define costab8   MAD_F(0x0ec835e8)

#define costab9   MAD_F(0x0e76bd7a)

#define costab10   MAD_F(0x0e1c5979)

#define costab11   MAD_F(0x0db941a3)

#define costab12   MAD_F(0x0d4db315)

#define costab13   MAD_F(0x0cd9f024)

#define costab14   MAD_F(0x0c5e4036)

#define costab15   MAD_F(0x0bdaef91)

#define costab16   MAD_F(0x0b504f33)

#define costab17   MAD_F(0x0abeb49a)

#define costab18   MAD_F(0x0a267993)

#define costab19   MAD_F(0x0987fbfe)

#define costab20   MAD_F(0x08e39d9d)

#define costab21   MAD_F(0x0839c3cd)

#define costab22   MAD_F(0x078ad74e)

#define costab23   MAD_F(0x06d74402)

#define costab24   MAD_F(0x061f78aa)

#define costab25   MAD_F(0x0563e69d)

#define costab26   MAD_F(0x04a5018c)

#define costab27   MAD_F(0x03e33f2f)

#define costab28   MAD_F(0x031f1708)

#define costab29   MAD_F(0x0259020e)

#define costab30   MAD_F(0x01917a6c)

#define costab31   MAD_F(0x00c8fb30)

#define ML0(hi, lo, x, y)   MAD_F_ML0((hi), (lo), (x), (y))

third SSO shift and/or D[] optimization preshift

#define MLA(hi, lo, x, y)   MAD_F_MLA((hi), (lo), (x), (y))

#define MLN(hi, lo)   MAD_F_MLN((hi), (lo))

#define MLZ(hi, lo)   MAD_F_MLZ((hi), (lo))

#define SHIFT(x)   (x)

FPM_DEFAULT without OPT_SSO will actually lose accuracy and performance.

#define MAD_F_SCALEBITS   (MAD_F_FRACBITS - 12)

#define PRESHIFT(x)   (MAD_F(x) >> 12)

Functions

void mad_synth_init (struct mad_synth *synth)

Initializes synth struct.

void mad_synth_mute (struct mad_synth *synth)

Zeroes all polyphase filterbank values, resetting synthesis.

static void dct32 (mad_fixed_t const in[32], unsigned int slot, mad_fixed_t lo[16][8], mad_fixed_t hi[16][8])

Performs fast in[32]->out[32] DCT.

static void synth_full (struct mad_synth *synth, struct mad_frame const *frame, unsigned int nch, unsigned int ns)

perform full frequency PCM synthesis.

static void synth_half (struct mad_synth *synth, struct mad_frame const *frame, unsigned int nch, unsigned int ns)

perform half frequency PCM synthesis.

void mad_synth_frame (struct mad_synth *synth, struct mad_frame const *frame)

perform PCM synthesis of frame subband samples.

Variables

static mad_fixed_t const D [17][32]

Detailed Description

Implements the mad_synth methods, to perform PCM synthesis.

Definition in file synth.c.

Define Documentation

#define costab1 MAD_F(0x0ffb10f2)

Referenced by dct32().

#define costab10 MAD_F(0x0e1c5979)

Referenced by dct32().

#define costab11 MAD_F(0x0db941a3)

Referenced by dct32().

#define costab12 MAD_F(0x0d4db315)

Referenced by dct32().

#define costab13 MAD_F(0x0cd9f024)

Referenced by dct32().

#define costab14 MAD_F(0x0c5e4036)

Referenced by dct32().

#define costab15 MAD_F(0x0bdaef91)

Referenced by dct32().

#define costab16 MAD_F(0x0b504f33)

Referenced by dct32().

#define costab17 MAD_F(0x0abeb49a)

Referenced by dct32().

#define costab18 MAD_F(0x0a267993)

Referenced by dct32().

#define costab19 MAD_F(0x0987fbfe)

Referenced by dct32().

#define costab2 MAD_F(0x0fec46d2)

Referenced by dct32().

#define costab20 MAD_F(0x08e39d9d)

Referenced by dct32().

#define costab21 MAD_F(0x0839c3cd)

Referenced by dct32().

#define costab22 MAD_F(0x078ad74e)

Referenced by dct32().

#define costab23 MAD_F(0x06d74402)

Referenced by dct32().

#define costab24 MAD_F(0x061f78aa)

Referenced by dct32().

#define costab25 MAD_F(0x0563e69d)

Referenced by dct32().

#define costab26 MAD_F(0x04a5018c)

Referenced by dct32().

#define costab27 MAD_F(0x03e33f2f)

Referenced by dct32().

#define costab28 MAD_F(0x031f1708)

Referenced by dct32().

#define costab29 MAD_F(0x0259020e)

Referenced by dct32().

#define costab3 MAD_F(0x0fd3aac0)

Referenced by dct32().

#define costab30 MAD_F(0x01917a6c)

Referenced by dct32().

#define costab31 MAD_F(0x00c8fb30)

Referenced by dct32().

#define costab4 MAD_F(0x0fb14be8)

Referenced by dct32().

#define costab5 MAD_F(0x0f853f7e)

Referenced by dct32().

#define costab6 MAD_F(0x0f4fa0ab)

Referenced by dct32().

#define costab7 MAD_F(0x0f109082)

Referenced by dct32().

#define costab8 MAD_F(0x0ec835e8)

Referenced by dct32().

#define costab9 MAD_F(0x0e76bd7a)

Referenced by dct32().

#define MAD_F_SCALEBITS (MAD_F_FRACBITS - 12)

Definition at line 543 of file synth.c.

#define ML0	(	hi,
		lo,
		x,
		y	)	MAD_F_ML0((hi), (lo), (x), (y))

third SSO shift and/or D[] optimization preshift

Definition at line 536 of file synth.c.

Referenced by synth_full(), and synth_half().

#define MLA	(	hi,
		lo,
		x,
		y	)	MAD_F_MLA((hi), (lo), (x), (y))

Definition at line 537 of file synth.c.

Referenced by synth_full(), and synth_half().

#define MLN	(	hi,
		lo		)	MAD_F_MLN((hi), (lo))

Definition at line 538 of file synth.c.

Referenced by synth_full(), and synth_half().

#define MLZ	(	hi,
		lo		)	MAD_F_MLZ((hi), (lo))

Definition at line 539 of file synth.c.

Referenced by synth_full(), and synth_half().

#define PRESHIFT ( x ) (MAD_F(x) >> 12)

Definition at line 544 of file synth.c.

Function Documentation

static void dct32	(	mad_fixed_t const	in[32],
		unsigned int	slot,
		mad_fixed_t	lo[16][8],
		mad_fixed_t	hi[16][8]
	)			`[static]`

Performs fast in[32]->out[32] DCT.

costab[i] = cos(PI / (2 * 32) * i)

Definition at line 129 of file synth.c.

References costab1, costab10, costab11, costab12, costab13, costab14, costab15, costab16, costab17, costab18, costab19, costab2, costab20, costab21, costab22, costab23, costab24, costab25, costab26, costab27, costab28, costab29, costab3, costab30, costab31, costab4, costab5, costab6, costab7, costab8, costab9, MUL, and SHIFT.

Referenced by synth_full(), and synth_half().

void mad_synth_frame	(	struct mad_synth *	synth,
		struct mad_frame const *	frame
	)

perform PCM synthesis of frame subband samples.

Definition at line 835 of file synth.c.

References mad_pcm::channels, mad_frame::header, mad_pcm::length, MAD_NCHANNELS, MAD_NSBSAMPLES, MAD_OPTION_HALFSAMPLERATE, mad_frame::options, mad_synth::pcm, mad_synth::phase, mad_header::samplerate, mad_pcm::samplerate, synth_full(), and synth_half().

Referenced by run_sync().

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void mad_synth_init ( struct mad_synth * synth )

Initializes synth struct.

Definition at line 38 of file synth.c.

References mad_pcm::channels, mad_pcm::length, mad_synth_mute(), mad_synth::pcm, mad_synth::phase, and mad_pcm::samplerate.

Referenced by run_sync().

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void mad_synth_mute ( struct mad_synth * synth )

Zeroes all polyphase filterbank values, resetting synthesis.

Definition at line 52 of file synth.c.

References mad_synth::filter, and s.

Referenced by mad_synth_init().

static void synth_full	(	struct mad_synth *	synth,
		struct mad_frame const *	frame,
		unsigned int	nch,
		unsigned int	ns
	)			`[static]`

perform full frequency PCM synthesis.

Definition at line 563 of file synth.c.

References D, dct32(), mad_synth::filter, ML0, MLA, MLN, MLZ, mad_synth::pcm, mad_synth::phase, s, mad_pcm::samples, mad_frame::sbsample, and SHIFT.

Referenced by mad_synth_frame().

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static void synth_half	(	struct mad_synth *	synth,
		struct mad_frame const *	frame,
		unsigned int	nch,
		unsigned int	ns
	)			`[static]`

perform half frequency PCM synthesis.

Definition at line 699 of file synth.c.

References D, dct32(), mad_synth::filter, ML0, MLA, MLN, MLZ, mad_synth::pcm, mad_synth::phase, s, mad_pcm::samples, mad_frame::sbsample, and SHIFT.

Referenced by mad_synth_frame().

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Variable Documentation

mad_fixed_t const D[17][32] [static]

Definition at line 551 of file synth.c.

Referenced by synth_full(), and synth_half().


Defines
#define	SHIFT(x) (x)
	FPM_DEFAULT without OPT_SSO will actually lose accuracy and performance.
#define	MUL(x, y) mad_f_mul((x), (y))
#define	costab1 MAD_F(0x0ffb10f2)
#define	costab2 MAD_F(0x0fec46d2)
#define	costab3 MAD_F(0x0fd3aac0)
#define	costab4 MAD_F(0x0fb14be8)
#define	costab5 MAD_F(0x0f853f7e)
#define	costab6 MAD_F(0x0f4fa0ab)
#define	costab7 MAD_F(0x0f109082)
#define	costab8 MAD_F(0x0ec835e8)
#define	costab9 MAD_F(0x0e76bd7a)
#define	costab10 MAD_F(0x0e1c5979)
#define	costab11 MAD_F(0x0db941a3)
#define	costab12 MAD_F(0x0d4db315)
#define	costab13 MAD_F(0x0cd9f024)
#define	costab14 MAD_F(0x0c5e4036)
#define	costab15 MAD_F(0x0bdaef91)
#define	costab16 MAD_F(0x0b504f33)
#define	costab17 MAD_F(0x0abeb49a)
#define	costab18 MAD_F(0x0a267993)
#define	costab19 MAD_F(0x0987fbfe)
#define	costab20 MAD_F(0x08e39d9d)
#define	costab21 MAD_F(0x0839c3cd)
#define	costab22 MAD_F(0x078ad74e)
#define	costab23 MAD_F(0x06d74402)
#define	costab24 MAD_F(0x061f78aa)
#define	costab25 MAD_F(0x0563e69d)
#define	costab26 MAD_F(0x04a5018c)
#define	costab27 MAD_F(0x03e33f2f)
#define	costab28 MAD_F(0x031f1708)
#define	costab29 MAD_F(0x0259020e)
#define	costab30 MAD_F(0x01917a6c)
#define	costab31 MAD_F(0x00c8fb30)
#define	ML0(hi, lo, x, y) MAD_F_ML0((hi), (lo), (x), (y))
	third SSO shift and/or D[] optimization preshift
#define	MLA(hi, lo, x, y) MAD_F_MLA((hi), (lo), (x), (y))
#define	MLN(hi, lo) MAD_F_MLN((hi), (lo))
#define	MLZ(hi, lo) MAD_F_MLZ((hi), (lo))
#define	SHIFT(x) (x)
	FPM_DEFAULT without OPT_SSO will actually lose accuracy and performance.
#define	MAD_F_SCALEBITS (MAD_F_FRACBITS - 12)
#define	PRESHIFT(x) (MAD_F(x) >> 12)
Functions
void	mad_synth_init (struct mad_synth *synth)
	Initializes synth struct.
void	mad_synth_mute (struct mad_synth *synth)
	Zeroes all polyphase filterbank values, resetting synthesis.
static void	dct32 (mad_fixed_t const in[32], unsigned int slot, mad_fixed_t lo[16][8], mad_fixed_t hi[16][8])
	Performs fast in[32]->out[32] DCT.
static void	synth_full (struct mad_synth synth, struct mad_frame const frame, unsigned int nch, unsigned int ns)
	perform full frequency PCM synthesis.
static void	synth_half (struct mad_synth synth, struct mad_frame const frame, unsigned int nch, unsigned int ns)
	perform half frequency PCM synthesis.
void	mad_synth_frame (struct mad_synth synth, struct mad_frame const frame)
	perform PCM synthesis of frame subband samples.
Variables
static mad_fixed_t const	D [17][32]