wma.h File Reference

The asf_header structure and public wma function declarations. More...

Data Structures
struct	asf_header_info
	Information contained in an asf audio file header. More...

Macros
#define	WMA_FRAME_SKIP   31

Functions
__a_const int	wma_log2 (unsigned int v)
	Compute the base-2 logarithm. More...
const char *	search_pattern (const char *pattern, int pattern_len, const char *buf, int buf_size)
	Find the first occurrence of the given pattern. More...
int	read_asf_header (const char *buf, int loaded, struct asf_header_info *ahi)
	Read an asf audio file header. More...

Detailed Description

The asf_header structure and public wma function declarations.

Macro Definition Documentation

WMA_FRAME_SKIP

#define WMA_FRAME_SKIP   31

Function Documentation

wma_log2()

__a_const int wma_log2

(

unsigned int

v

)

Compute the base-2 logarithm.

Parameters

v	The value to compute the logarithm of.

Returns

An integer approximation of log2(v).

search_pattern()

const char* search_pattern	(	const char *	pattern,
		int	pattern_len,
		const char *	buf,
		int	buf_size
	)

Find the first occurrence of the given pattern.

Parameters

pattern	The pattern to search for.
pattern_len	The length of the pattern in bytes.
buf	The buffer to search for the pattern.
buf_size	The number of bytes in buf.

Returns

A pointer into buf or NULL if the pattern was not found.

References PARA_DEBUG_LOG, and PARA_NOTICE_LOG.

read_asf_header()

int read_asf_header	(	const char *	buf,
		int	loaded,
		struct asf_header_info *	ahi
	)

Read an asf audio file header.

Parameters

buf	The input buffer.
loaded	Number of bytes in buf.
ahi	Result pointer.

Returns

Negative on errors, zero if more data is needed in order to read the full header, 1 on success.

References asf_header_info::header_len.