Representation of RIFF/WAVE file format. More...

Data Structures
struct	pjmedia_wave_hdr

struct	pjmedia_wave_subchunk

Macros
#define	PJMEDIA_RIFF_TAG ('F'<<24\|'F'<<16\|'I'<<8\|'R')

#define	PJMEDIA_WAVE_TAG ('E'<<24\|'V'<<16\|'A'<<8\|'W')

#define	PJMEDIA_FMT_TAG (' '<<24\|'t'<<16\|'m'<<8\|'f')

#define	PJMEDIA_DATA_TAG ('a'<<24\|'t'<<16\|'a'<<8\|'d')

#define	PJMEDIA_FACT_TAG ('t'<<24\|'c'<<16\|'a'<<8\|'f')

#define	PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(ch)

Enumerations
enum	pjmedia_wave_fmt_tag { PJMEDIA_WAVE_FMT_TAG_PCM = 1 , PJMEDIA_WAVE_FMT_TAG_ALAW = 6 , PJMEDIA_WAVE_FMT_TAG_ULAW = 7 }

Functions
void	pjmedia_wave_hdr_file_to_host (pjmedia_wave_hdr *hdr)

void	pjmedia_wave_hdr_host_to_file (pjmedia_wave_hdr *hdr)

Detailed Description

This the the low level representation of RIFF/WAVE file format. For higher abstraction, please see WAV File Player and File Writer (Recorder).

Macro Definition Documentation

◆ PJMEDIA_RIFF_TAG

#define PJMEDIA_RIFF_TAG ('F'<<24|'F'<<16|'I'<<8|'R')

Standard RIFF tag to identify RIFF file format in the WAVE header.

◆ PJMEDIA_WAVE_TAG

#define PJMEDIA_WAVE_TAG ('E'<<24|'V'<<16|'A'<<8|'W')

Standard WAVE tag to identify WAVE header.

◆ PJMEDIA_FMT_TAG

#define PJMEDIA_FMT_TAG (' '<<24|'t'<<16|'m'<<8|'f')

Standard FMT tag to identify format chunks.

◆ PJMEDIA_DATA_TAG

#define PJMEDIA_DATA_TAG ('a'<<24|'t'<<16|'a'<<8|'d')

Standard DATA tag to identify data chunks.

◆ PJMEDIA_FACT_TAG

#define PJMEDIA_FACT_TAG ('t'<<24|'c'<<16|'a'<<8|'f')

Standard FACT tag to identify fact chunks.

◆ PJMEDIA_WAVE_NORMALIZE_SUBCHUNK

#define PJMEDIA_WAVE_NORMALIZE_SUBCHUNK ( ch )

Normalize subchunk header from little endian (the representation of RIFF file) into host's endian.

Enumeration Type Documentation

◆ pjmedia_wave_fmt_tag

enum pjmedia_wave_fmt_tag

Enumeration of format compression tag.

Function Documentation

◆ pjmedia_wave_hdr_file_to_host()

void pjmedia_wave_hdr_file_to_host ( pjmedia_wave_hdr * hdr )

On big-endian hosts, this function swaps the byte order of the values in the WAVE header fields. On little-endian hosts, this function does nothing.

Application SHOULD call this function after reading the WAVE header chunks from a file.

Parameters

hdr	The WAVE header.

◆ pjmedia_wave_hdr_host_to_file()

void pjmedia_wave_hdr_host_to_file ( pjmedia_wave_hdr * hdr )