hvirtual/quicktime/ffmpeg/libavcodec/ra144.c File Reference

#include "avcodec.h"
#include "ra144.h"

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Data Structures
struct	Real144_internal
Defines
#define	DATABLOCK1   20
#define	DATACHUNK1   1440
#define	AUDIOBLOCK   160
#define	AUDIOBUFFER   12288
#define	NBLOCKS   4
#define	BLOCKSIZE   40
#define	HALFBLOCK   20
#define	BUFFERSIZE   146
Functions
static int	ra144_decode_init (AVCodecContext *avctx)
static void	final (Real144_internal *glob, short *i1, short *i2, void *out, int *statbuf, int len)
static void	add_wav (Real144_internal *glob, int n, int f, int m1, int m2, int m3, short *s1, short *s2, short *s3, short *dest)
static int	irms (short *data, int factor)
static void	rotate_block (short *source, short *target, int offset)
static int	t_sqrt (unsigned int x)
static void	do_voice (int *a1, int *a2)
static void	do_output_subblock (Real144_internal *glob, unsigned int x)
static void	unpack_input (unsigned char *input, unsigned int *output)
static unsigned int	rms (int *data, int f)
static void	dec1 (Real144_internal *glob, int *data, int *inp, int n, int f)
static int	eq (Real144_internal *glob, short *in, int *target)
static void	dec2 (Real144_internal *glob, int *data, int *inp, int n, int f, int *inp2, int l)
static int	ra144_decode_frame (AVCodecContext *avctx, void *vdata, int *data_size, uint8_t *buf, int buf_size)
Variables
AVCodec	ra_144_decoder

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Define Documentation

#define AUDIOBLOCK   160

Definition at line 25 of file ra144.c.

#define AUDIOBUFFER   12288

Definition at line 26 of file ra144.c.

#define BLOCKSIZE   40

Definition at line 29 of file ra144.c.

Referenced by add_wav(), do_output_subblock(), irms(), ra144_decode_frame(), and rotate_block().

#define BUFFERSIZE   146

Definition at line 31 of file ra144.c.

#define DATABLOCK1   20

Definition at line 23 of file ra144.c.

#define DATACHUNK1   1440

Definition at line 24 of file ra144.c.

#define HALFBLOCK   20

Definition at line 30 of file ra144.c.

Referenced by do_output_subblock().

#define NBLOCKS   4

Definition at line 28 of file ra144.c.

Referenced by dec2(), and ra144_decode_frame().

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Function Documentation

static void add_wav	(	Real144_internal *	glob,
		int	n,
		int	f,
		int	m1,
		int	m2,
		int	m3,
		short *	s1,
		short *	s2,
		short *	s3,
		short *	dest
	)			[static]

Definition at line 185 of file ra144.c.

References a, b, BLOCKSIZE, c, Real144_internal::wavtable1, and Real144_internal::wavtable2.

Referenced by do_output_subblock().

static void dec1	(	Real144_internal *	glob,
		int *	data,
		int *	inp,
		int	n,
		int	f
	)			[static]

Definition at line 340 of file ra144.c.

References Real144_internal::decptr, Real144_internal::decsp, and rms().

Referenced by dec2(), and ra144_decode_frame().

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static void dec2	(	Real144_internal *	glob,
		int *	data,
		int *	inp,
		int	n,
		int	f,
		int *	inp2,
		int	l
	)			[static]

Definition at line 394 of file ra144.c.

References a, b, dec1(), Real144_internal::decptr, Real144_internal::decsp, eq(), Real144_internal::gbuf1, Real144_internal::gbuf2, NBLOCKS, rms(), and Real144_internal::sptr.

Referenced by ra144_decode_frame().

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static void do_output_subblock	(	Real144_internal *	glob,
		unsigned int	x
	)			[static]

Definition at line 133 of file ra144.c.

References a, add_wav(), b, BLOCKSIZE, Real144_internal::buffer, Real144_internal::buffer_2, Real144_internal::buffer_a, Real144_internal::buffer_b, Real144_internal::buffer_c, Real144_internal::buffer_d, BUFFERSIZE, c, e, etable1, etable2, ftable1, ftable2, Real144_internal::gsp, Real144_internal::gval, HALFBLOCK, Real144_internal::iptr, irms(), memcpy, Real144_internal::output_buffer, and rotate_block().

Referenced by ra144_decode_frame().

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static void do_voice	(	int *	a1,
		int *	a2
	)			[static]

Definition at line 104 of file ra144.c.

Referenced by ra144_decode_frame().

static int eq	(	Real144_internal *	glob,
		short *	in,
		int *	target
	)			[static]

Definition at line 350 of file ra144.c.

References a, b, Real144_internal::buffer1, Real144_internal::buffer2, and c.

Referenced by dec2().

static void final	(	Real144_internal *	glob,
		short *	i1,
		short *	i2,
		void *	out,
		int *	statbuf,
		int	len
	)			[static]

Definition at line 211 of file ra144.c.

References memcpy.

static int irms	(	short *	data,
		int	factor
	)			[static]

Definition at line 174 of file ra144.c.

References BLOCKSIZE, and t_sqrt().

Referenced by do_output_subblock().

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static int ra144_decode_frame	(	AVCodecContext *	avctx,
		void *	vdata,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 426 of file ra144.c.

References a, b, BLOCKSIZE, c, dec1(), dec2(), decodetable, do_output_subblock(), do_voice(), Real144_internal::gbuf1, Real144_internal::gbuf2, Real144_internal::gsp, Real144_internal::gval, Real144_internal::iptr, NBLOCKS, Real144_internal::oldval, Real144_internal::output_buffer, AVCodecContext::priv_data, Real144_internal::resetflag, s, Real144_internal::swapbuf1, Real144_internal::swapbuf1alt, Real144_internal::swapbuf2, Real144_internal::swapbuf2alt, t_sqrt(), unpack_input(), Real144_internal::unpacked, and Real144_internal::val.

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static int ra144_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 74 of file ra144.c.

References memcpy, AVCodecContext::priv_data, Real144_internal::resetflag, Real144_internal::swapb1a, Real144_internal::swapb1b, Real144_internal::swapb2a, Real144_internal::swapb2b, Real144_internal::swapbuf1, Real144_internal::swapbuf1alt, Real144_internal::swapbuf2, Real144_internal::swapbuf2alt, wavtable1, Real144_internal::wavtable1, wavtable2, and Real144_internal::wavtable2.

static unsigned int rms	(	int *	data,
		int	f
	)			[static]

Definition at line 306 of file ra144.c.

References b, c, and t_sqrt().

Referenced by dec1(), and dec2().

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static void rotate_block	(	short *	source,
		short *	target,
		int	offset
	)			[static]

Definition at line 158 of file ra144.c.

References BLOCKSIZE, and BUFFERSIZE.

Referenced by do_output_subblock().

static int t_sqrt

(

unsigned int

x

)

[static]

Definition at line 96 of file ra144.c.

References s, and sqrt_table.

Referenced by irms(), ra144_decode_frame(), and rms().

static void unpack_input	(	unsigned char *	input,
		unsigned int *	output
	)			[static]

Definition at line 252 of file ra144.c.

Referenced by ra144_decode_frame().

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Variable Documentation

AVCodec ra_144_decoder

Initial value:

{
    "real_144",
    CODEC_TYPE_AUDIO,
    CODEC_ID_RA_144,
    sizeof(Real144_internal),
    ra144_decode_init,
    NULL,
    NULL,
    ra144_decode_frame,
}

Definition at line 507 of file ra144.c.

Referenced by avcodec_register_all().