mulaw.c File Reference

#include <linux/time.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include "pcm_plugin.h"

Go to the source code of this file.

Data Structures
struct	mulaw_priv

Macros
#define	SIGN_BIT   (0x80) /* Sign bit for a u-law byte. */
#define	QUANT_MASK   (0xf) /* Quantization field mask. */
#define	NSEGS   (8) /* Number of u-law segments. */
#define	SEG_SHIFT   (4) /* Left shift for segment number. */
#define	SEG_MASK   (0x70) /* Segment field mask. */
#define	BIAS   (0x84) /* Bias for linear code. */

Typedefs
typedef void(*	mulaw_f )(struct snd_pcm_plugin *plugin, const struct snd_pcm_plugin_channel *src_channels, struct snd_pcm_plugin_channel *dst_channels, snd_pcm_uframes_t frames)

Functions
int	snd_pcm_plugin_build_mulaw (struct snd_pcm_substream *plug, struct snd_pcm_plugin_format *src_format, struct snd_pcm_plugin_format *dst_format, struct snd_pcm_plugin **r_plugin)

Macro Definition Documentation

#define BIAS   (0x84) /* Bias for linear code. */

Definition at line 52 of file mulaw.c.

#define NSEGS   (8) /* Number of u-law segments. */

Definition at line 31 of file mulaw.c.

#define QUANT_MASK   (0xf) /* Quantization field mask. */

Definition at line 30 of file mulaw.c.

#define SEG_MASK   (0x70) /* Segment field mask. */

Definition at line 33 of file mulaw.c.

#define SEG_SHIFT   (4) /* Left shift for segment number. */

Definition at line 32 of file mulaw.c.

#define SIGN_BIT   (0x80) /* Sign bit for a u-law byte. */

Definition at line 29 of file mulaw.c.

Typedef Documentation

typedef void(* mulaw_f)(struct snd_pcm_plugin *plugin, const struct snd_pcm_plugin_channel *src_channels, struct snd_pcm_plugin_channel *dst_channels, snd_pcm_uframes_t frames)

Definition at line 141 of file mulaw.c.

Function Documentation

int snd_pcm_plugin_build_mulaw	(	struct snd_pcm_substream *	plug,
		struct snd_pcm_plugin_format *	src_format,
		struct snd_pcm_plugin_format *	dst_format,
		struct snd_pcm_plugin **	r_plugin
	)

Definition at line 298 of file mulaw.c.