libavfilter/bufferqueue.h File Reference

#include "avfilter.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Data Structures
struct	FFBufQueue
	Structure holding the queue. More...
Defines
#define	FF_BUFQUEUE_SIZE   32
	FFBufQueue: simple AVFilterBufferRef queue API.
#define	BUCKET(i)   queue->queue[(queue->head + (i)) % FF_BUFQUEUE_SIZE]
Functions
static void	ff_bufqueue_add (void *log, struct FFBufQueue *queue, AVFilterBufferRef *buf)
	Add a buffer to the queue.
static AVFilterBufferRef *	ff_bufqueue_peek (struct FFBufQueue *queue, unsigned index)
	Get a buffer from the queue without altering it.
static AVFilterBufferRef *	ff_bufqueue_get (struct FFBufQueue *queue)
	Get the first buffer from the queue and remove it.
static void	ff_bufqueue_discard_all (struct FFBufQueue *queue)
	Unref and remove all buffers from the queue.

---

Define Documentation

#define BUCKET

(

i

)

queue->queue[(queue->head + (i)) % FF_BUFQUEUE_SIZE]

Definition at line 55 of file bufferqueue.h.

Referenced by ff_bufqueue_add(), and ff_bufqueue_peek().

#define FF_BUFQUEUE_SIZE   32

FFBufQueue: simple AVFilterBufferRef queue API.

Note: this API is not thread-safe. Concurrent access to the same queue must be protected by a mutex or any synchronization mechanism. Maximum size of the queue.

This value can be overridden by definying it before including this header. Powers of 2 are recommended.

Definition at line 40 of file bufferqueue.h.

---

Function Documentation

static void ff_bufqueue_add	(	void *	log,
		struct FFBufQueue *	queue,
		AVFilterBufferRef *	buf
	)			[inline, static]

Add a buffer to the queue.

If the queue is already full, then the current last buffer is dropped (and unrefed) with a warning before adding the new buffer.

Definition at line 63 of file bufferqueue.h.

Referenced by end_frame(), end_frame_over(), filter_samples(), process_frame(), and start_frame_main().

static void ff_bufqueue_discard_all

(

struct FFBufQueue *

queue

)

[inline, static]

Unref and remove all buffers from the queue.

Definition at line 103 of file bufferqueue.h.

Referenced by uninit().

static AVFilterBufferRef* ff_bufqueue_get

(

struct FFBufQueue *

queue

)

[inline, static]

Get the first buffer from the queue and remove it.

Do not use on an empty queue.

Definition at line 90 of file bufferqueue.h.

Referenced by end_frame(), ff_bufqueue_discard_all(), flush_segment(), try_start_frame(), and try_start_next_frame().

static AVFilterBufferRef* ff_bufqueue_peek	(	struct FFBufQueue *	queue,
		unsigned	index
	)			[inline, static]

Get a buffer from the queue without altering it.

Buffer with index 0 is the first buffer in the queue. Return NULL if the queue has not enough buffers.

Definition at line 79 of file bufferqueue.h.

Referenced by end_frame(), filter_samples(), request_frame(), try_start_frame(), and try_start_next_frame().