framequeue.h File Reference

#include "libavutil/frame.h"

Go to the source code of this file.

Data Structures
struct	FFFrameBucket
	FFFrameQueue: simple AVFrame queue API. More...
struct	FFFrameQueueGlobal
	Structure to hold global options and statistics for frame queues. More...
struct	FFFrameQueue
	Queue of AVFrame pointers. More...

Functions
void	ff_framequeue_global_init (FFFrameQueueGlobal *fqg)
	Init a global structure. More...
void	ff_framequeue_init (FFFrameQueue *fq, FFFrameQueueGlobal *fqg)
	Init a frame queue and attach it to a global structure. More...
void	ff_framequeue_free (FFFrameQueue *fq)
	Free the queue and all queued frames. More...
int	ff_framequeue_add (FFFrameQueue *fq, AVFrame *frame)
	Add a frame. More...
AVFrame *	ff_framequeue_take (FFFrameQueue *fq)
	Take the first frame in the queue. More...
AVFrame *	ff_framequeue_peek (FFFrameQueue *fq, size_t idx)
	Access a frame in the queue, without removing it. More...
static size_t	ff_framequeue_queued_frames (const FFFrameQueue *fq)
	Get the number of queued frames. More...
static uint64_t	ff_framequeue_queued_samples (const FFFrameQueue *fq)
	Get the number of queued samples. More...
static void	ff_framequeue_update_peeked (FFFrameQueue *fq, size_t idx)
	Update the statistics after a frame accessed using ff_framequeue_peek() was modified. More...
void	ff_framequeue_skip_samples (FFFrameQueue *fq, size_t samples, AVRational time_base)
	Skip samples from the first frame in the queue. More...

Function Documentation

ff_framequeue_global_init()

void ff_framequeue_global_init

(

FFFrameQueueGlobal *

fqg

)

Init a global structure.

Definition at line 30 of file framequeue.c.

Referenced by avfilter_graph_alloc().

ff_framequeue_init()

void ff_framequeue_init	(	FFFrameQueue *	fq,
		FFFrameQueueGlobal *	fqg
	)

Init a frame queue and attach it to a global structure.

Definition at line 47 of file framequeue.c.

Referenced by avfilter_link().

ff_framequeue_free()

void ff_framequeue_free

(

FFFrameQueue *

fq

)

Free the queue and all queued frames.

Definition at line 53 of file framequeue.c.

Referenced by avfilter_link_free().

ff_framequeue_add()

int ff_framequeue_add	(	FFFrameQueue *	fq,
		AVFrame *	frame
	)

Add a frame.

Returns

>=0 or an AVERROR code.

Definition at line 63 of file framequeue.c.

Referenced by ff_filter_frame().

ff_framequeue_take()

AVFrame* ff_framequeue_take

(

FFFrameQueue *

fq

)

Take the first frame in the queue.

Must not be used with empty queues.

Definition at line 98 of file framequeue.c.

Referenced by ff_framequeue_free(), ff_inlink_consume_frame(), ff_inlink_set_status(), and take_samples().

ff_framequeue_peek()

AVFrame* ff_framequeue_peek	(	FFFrameQueue *	fq,
		size_t	idx
	)

Access a frame in the queue, without removing it.

The first frame is numbered 0; the designated frame must exist.

Definition at line 115 of file framequeue.c.

Referenced by ff_inlink_consume_frame(), ff_inlink_peek_frame(), and take_samples().

ff_framequeue_queued_frames()

static size_t ff_framequeue_queued_frames ( const FFFrameQueue *  fq )

inlinestatic

Get the number of queued frames.

Definition at line 146 of file framequeue.h.

Referenced by activate(), ff_filter_activate_default(), ff_filter_frame_to_filter(), ff_inlink_acknowledge_status(), ff_inlink_check_available_frame(), ff_inlink_queued_frames(), ff_inlink_set_status(), ff_request_frame(), samples_ready(), and take_samples().

ff_framequeue_queued_samples()

static uint64_t ff_framequeue_queued_samples ( const FFFrameQueue *  fq )

inlinestatic

Get the number of queued samples.

Definition at line 154 of file framequeue.h.

Referenced by ff_inlink_check_available_samples(), ff_inlink_consume_samples(), ff_inlink_queued_samples(), and samples_ready().

ff_framequeue_update_peeked()

static void ff_framequeue_update_peeked ( FFFrameQueue *  fq, size_t  idx  )

inlinestatic

Update the statistics after a frame accessed using ff_framequeue_peek() was modified.

Currently used only as a marker.

Definition at line 164 of file framequeue.h.

Referenced by ff_framequeue_skip_samples().

ff_framequeue_skip_samples()

void ff_framequeue_skip_samples	(	FFFrameQueue *	fq,
		size_t	samples,
		AVRational	time_base
	)

Skip samples from the first frame in the queue.

This function must be used when the first frame was accessed using ff_framequeue_peek() and samples were consumed from it. It adapts the data pointers and timestamps of the head frame to account for the skipped samples.

Definition at line 126 of file framequeue.c.

Referenced by take_samples().