FFmpeg
Data Structures | Macros | Functions
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...
 

Macros

#define  FF_BUFQUEUE_SIZE   64
  FFBufQueue: simple AVFrame queue API.
 
#define  BUCKET(i)   queue->queue[(queue->head + (i)) % FF_BUFQUEUE_SIZE]
 

Functions

static int  ff_bufqueue_is_full (struct FFBufQueue *queue)
  Test if a buffer queue is full.
 
static void  ff_bufqueue_add (void *log, struct FFBufQueue *queue, AVFrame *buf)
  Add a buffer to the queue.
 
static AVFrameff_bufqueue_peek (struct FFBufQueue *queue, unsigned index)
  Get a buffer from the queue without altering it.
 
static AVFrameff_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.
 

Macro Definition Documentation

#define FF_BUFQUEUE_SIZE   64

FFBufQueue: simple AVFrame 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.

Referenced by ff_bufqueue_get(), and ff_bufqueue_is_full().

#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().

Function Documentation

static int ff_bufqueue_is_full ( struct FFBufQueuequeue )
inlinestatic

Test if a buffer queue is full.

Definition at line 60 of file bufferqueue.h.

Referenced by ff_bufqueue_add(), and filter_frame().

static void ff_bufqueue_add ( voidlog,
struct FFBufQueuequeue,
AVFramebuf 
)
inlinestatic

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 71 of file bufferqueue.h.

Referenced by ff_framesync_add_frame(), filter_frame(), and process_frame().

static AVFrame* ff_bufqueue_peek ( struct FFBufQueuequeue,
unsigned  index 
)
inlinestatic

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 87 of file bufferqueue.h.

Referenced by filter_frame(), push_frame(), and request_frame().

static AVFrame* ff_bufqueue_get ( struct FFBufQueuequeue )
inlinestatic

Get the first buffer from the queue and remove it.

Do not use on an empty queue.

Definition at line 98 of file bufferqueue.h.

Referenced by ff_bufqueue_discard_all(), ff_framesync_next(), filter_frame(), flush_segment(), and push_frame().

static void ff_bufqueue_discard_all ( struct FFBufQueuequeue )
inlinestatic

Unref and remove all buffers from the queue.

Definition at line 111 of file bufferqueue.h.

Referenced by ff_framesync_uninit(), and uninit().


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