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

#include "avcodec.h"

Include dependency graph for adx.c:

Go to the source code of this file.

Data Structures
struct	PREV
struct	ADXContext
Defines
#define	BASEVOL   0x4000
#define	SCALE1   0x7298
#define	SCALE2   0x3350
#define	CLIP(s)   if (s>32767) s=32767; else if (s<-32768) s=-32768
Functions
static void	adx_decode (short *out, const unsigned char *in, PREV *prev)
static void	adx_decode_stereo (short *out, const unsigned char *in, PREV *prev)
static uint32_t	read_long (const unsigned char *p)
int	is_adx (const unsigned char *buf, size_t bufsize)
static int	adx_decode_header (AVCodecContext *avctx, const unsigned char *buf, size_t bufsize)
static int	adx_decode_init (AVCodecContext *avctx)
static int	adx_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf0, int buf_size)
Variables
AVCodec	adx_adpcm_decoder

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Detailed Description

SEGA CRI adx codecs.

Reference documents: http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/

Definition in file adx.c.

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Define Documentation

#define BASEVOL   0x4000

Definition at line 43 of file adx.c.

Referenced by adx_decode().

#define CLIP

(

s

)

if (s>32767) s=32767; else if (s<-32768) s=-32768

Definition at line 47 of file adx.c.

#define SCALE1   0x7298

Definition at line 44 of file adx.c.

Referenced by adx_decode().

#define SCALE2   0x3350

Definition at line 45 of file adx.c.

Referenced by adx_decode().

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Function Documentation

static void adx_decode	(	short *	out,
		const unsigned char *	in,
		PREV *	prev
	)			[static]

Definition at line 96 of file adx.c.

References BASEVOL, CLIP, s0, PREV::s1, s1, PREV::s2, s2, SCALE1, and SCALE2.

Referenced by adx_decode_frame(), and adx_decode_stereo().

static int adx_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf0,
		int	buf_size
	)			[static]

Definition at line 330 of file adx.c.

References adx_decode(), adx_decode_header(), adx_decode_stereo(), AVCodecContext::channels, ADXContext::dec_temp, ADXContext::header_parsed, ADXContext::in_temp, memcpy, ADXContext::prev, and AVCodecContext::priv_data.

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static int adx_decode_header	(	AVCodecContext *	avctx,
		const unsigned char *	buf,
		size_t	bufsize
	)			[static]

Definition at line 281 of file adx.c.

References AVCodecContext::bit_rate, AVCodecContext::channels, is_adx(), offset, read_long(), and AVCodecContext::sample_rate.

Referenced by adx_decode_frame().

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static int adx_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 303 of file adx.c.

References ADXContext::header_parsed, ADXContext::in_temp, ADXContext::prev, AVCodecContext::priv_data, PREV::s1, and PREV::s2.

static void adx_decode_stereo	(	short *	out,
		const unsigned char *	in,
		PREV *	prev
	)			[static]

Definition at line 131 of file adx.c.

References adx_decode().

Referenced by adx_decode_frame().

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int is_adx	(	const unsigned char *	buf,
		size_t	bufsize
	)

Definition at line 270 of file adx.c.

References memcmp, offset, and read_long().

Referenced by adx_decode_header().

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static uint32_t read_long

(

const unsigned char *

p

)

[static]

Definition at line 265 of file adx.c.

Referenced by adx_decode_header(), and is_adx().

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Variable Documentation

AVCodec adx_adpcm_decoder

Initial value:

 {
    "adx_adpcm",
    CODEC_TYPE_AUDIO,
    CODEC_ID_ADPCM_ADX,
    sizeof(ADXContext),
    adx_decode_init,
    NULL,
    NULL,
    adx_decode_frame,
}

Definition at line 400 of file adx.c.