sync_queue.h File Reference

#include <stdint.h>
#include "libavcodec/packet.h"
#include "libavutil/frame.h"

Go to the source code of this file.

Data Structures
union	SyncQueueFrame

Macros
#define	SQFRAME(frame)
#define	SQPKT(pkt)

Enumerations
enum	SyncQueueType { SYNC_QUEUE_PACKETS , SYNC_QUEUE_FRAMES }

Functions
SyncQueue *	sq_alloc (enum SyncQueueType type, int64_t buf_size_us, void *logctx)
	Allocate a sync queue of the given type.
void	sq_free (SyncQueue **sq)
int	sq_add_stream (SyncQueue *sq, int limiting)
	Add a new stream to the sync queue.
void	sq_limit_frames (SyncQueue *sq, unsigned int stream_idx, uint64_t max_frames)
	Limit the number of output frames for stream with index stream_idx to max_frames.
void	sq_frame_samples (SyncQueue *sq, unsigned int stream_idx, int frame_samples)
	Set a constant output audio frame size, in samples.
int	sq_send (SyncQueue *sq, unsigned int stream_idx, SyncQueueFrame frame)
	Submit a frame for the stream with index stream_idx.
int	sq_receive (SyncQueue *sq, int stream_idx, SyncQueueFrame frame)
	Read a frame from the queue.

Macro Definition Documentation

SQFRAME

#define SQFRAME

(

frame

)

Value:

((SyncQueueFrame){ .f = (frame) })

Definition at line 38 of file sync_queue.h.

Referenced by send_to_enc_sq().

SQPKT

#define SQPKT

(

pkt

)

Value:

((SyncQueueFrame){ .p = (pkt) })

Definition at line 39 of file sync_queue.h.

Referenced by sync_queue_process().

Enumeration Type Documentation

SyncQueueType

enum SyncQueueType

Enumerator
SYNC_QUEUE_PACKETS
SYNC_QUEUE_FRAMES

Definition at line 28 of file sync_queue.h.

Function Documentation

sq_alloc()

SyncQueue * sq_alloc	(	enum SyncQueueType	type,
		int64_t	buf_size_us,
		void *	logctx )

Allocate a sync queue of the given type.

Parameters

buf_size_us

maximum duration that will be buffered in microseconds

Definition at line 654 of file sync_queue.c.

Referenced by sch_add_sq_enc(), and setup_sync_queues().

sq_free()

void sq_free

(

SyncQueue **

sq

)

Definition at line 671 of file sync_queue.c.

Referenced by of_free(), and sch_free().

sq_add_stream()

int sq_add_stream	(	SyncQueue *	sq,
		int	limiting )

Add a new stream to the sync queue.

Parameters

limiting

whether the stream is limiting, i.e. no other stream can be longer than this one

Returns

• a non-negative stream index on success
• a negative error code on error

Definition at line 598 of file sync_queue.c.

Referenced by sch_sq_add_enc(), and setup_sync_queues().

sq_limit_frames()

void sq_limit_frames	(	SyncQueue *	sq,
		unsigned int	stream_idx,
		uint64_t	max_frames )

Limit the number of output frames for stream with index stream_idx to max_frames.

Definition at line 628 of file sync_queue.c.

Referenced by sch_sq_add_enc(), and setup_sync_queues().

sq_frame_samples()

void sq_frame_samples	(	SyncQueue *	sq,
		unsigned int	stream_idx,
		int	frame_samples )

Set a constant output audio frame size, in samples.

Can only be used with SYNC_QUEUE_FRAMES queues and audio streams.

All output frames will have exactly frame_samples audio samples, except possibly for the last one, which may have fewer.

Definition at line 640 of file sync_queue.c.

Referenced by enc_open().

sq_send()

int sq_send	(	SyncQueue *	sq,
		unsigned int	stream_idx,
		SyncQueueFrame	frame )

Submit a frame for the stream with index stream_idx.

On success, the sync queue takes ownership of the frame and will reset the contents of the supplied frame. On failure, the frame remains owned by the caller.

Sending a frame with NULL contents marks the stream as finished.

Returns

• 0 on success
• AVERROR_EOF when no more frames should be submitted for this stream
• another a negative error code on failure

Definition at line 333 of file sync_queue.c.

Referenced by send_to_enc_sq(), and sync_queue_process().

sq_receive()

int sq_receive	(	SyncQueue *	sq,
		int	stream_idx,
		SyncQueueFrame	frame )

Read a frame from the queue.

Parameters

stream_idx	index of the stream to read a frame for. May be -1, then try to read a frame from any stream that is ready for output.
frame	output frame will be written here on success. The frame is owned by the caller.

Returns

• a non-negative index of the stream to which the returned frame belongs
• AVERROR(EAGAIN) when more frames need to be submitted to the queue
• AVERROR_EOF when no more frames will be available for this stream (for any stream if stream_idx is -1)
• another negative error code on failure

Definition at line 586 of file sync_queue.c.

Referenced by send_to_enc_sq(), and sync_queue_process().