ringbuffer.h File Reference

#include <gpac/tools.h>
#include <gpac/thread.h>

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Data Structures
struct	GF_Ringbuffer

Functions
GF_Ringbuffer *	gf_ringbuffer_new (u32 sz)
void	gf_ringbuffer_del (GF_Ringbuffer *ringbuffer)
u32	gf_ringbuffer_read (GF_Ringbuffer *rb, u8 *dest, u32 szDest)
u32	gf_ringbuffer_available_for_read (GF_Ringbuffer *rb)
u32	gf_ringbuffer_write (GF_Ringbuffer *rb, const u8 *src, u32 sz)

---

Data Structure Documentation

struct GF_Ringbuffer

Collaboration diagram for GF_Ringbuffer:

Data Fields
u8 *	buf
volatile u32	write_ptr
volatile u32	read_ptr
u32	size
u32	size_mask
GF_Mutex *	mx

Function Documentation

GF_Ringbuffer* gf_ringbuffer_new

(

u32

sz

)

Creates a new ringbuffer with specified size. The caller has the reponsability to free the ringbuffer using gf_ringbuffer_del()

Parameters

sz	the ringbuffer size in bytes

Returns

a pointer to a new ringbuffer if successful, NULL otherwise.

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void gf_ringbuffer_del

(

GF_Ringbuffer *

ringbuffer

)

Frees a previously allocated ringbuffer

Parameters

ringbuffer

The ringbuffer to free

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u32 gf_ringbuffer_read	(	GF_Ringbuffer *	rb,
		u8 *	dest,
		u32	szDest
	)

Reads bytes from ringbuffer

Parameters

rb	The ringbuffer to read from
dest	The destination
szDest	Size of destination

Returns

the number of bytes readen

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u32 gf_ringbuffer_available_for_read

(

GF_Ringbuffer *

rb

)

Return the number of bytes available for reading. This is the number of bytes in front of the read pointer and behind the write pointer.

Parameters

rb	The ringbuffer

Returns

the number of bytes available for reading

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u32 gf_ringbuffer_write	(	GF_Ringbuffer *	rb,
		const u8 *	src,
		u32	sz
	)

Copy at most sz bytes to rb from src.

Parameters

rb	The ringbuffer to write to
src	The source buffer
sz	the size of source

Returns

Returns the actual number of bytes copied, may be lower than sz if ringbuffer is already full

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