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)   ((SyncQueueFrame){ .f = (frame) })
#define	SQPKT(pkt)   ((SyncQueueFrame){ .p = (pkt) })

Enumerations
enum	SyncQueueType { SYNC_QUEUE_PACKETS, SYNC_QUEUE_FRAMES }

Functions
SyncQueue *	sq_alloc (enum SyncQueueType type, int64_t buf_size_us)
	Allocate a sync queue of the given type. More...
void	sq_free (SyncQueue **sq)
int	sq_add_stream (SyncQueue *sq, int limiting)
	Add a new stream to the sync queue. More...
void	sq_set_tb (SyncQueue *sq, unsigned int stream_idx, AVRational tb)
	Set the timebase for the stream with index stream_idx. More...
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. More...
int	sq_send (SyncQueue *sq, unsigned int stream_idx, SyncQueueFrame frame)
	Submit a frame for the stream with index stream_idx. More...
int	sq_receive (SyncQueue *sq, int stream_idx, SyncQueueFrame frame)
	Read a frame from the queue. More...

Macro Definition Documentation

SQFRAME

#define SQFRAME

(

frame

)

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

Definition at line 38 of file sync_queue.h.

SQPKT

#define SQPKT

(

pkt

)

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

Definition at line 39 of file sync_queue.h.

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
	)

Allocate a sync queue of the given type.

Parameters

buf_size_us

maximum duration that will be buffered in microseconds

Definition at line 405 of file sync_queue.c.

Referenced by setup_sync_queues().

sq_free()

void sq_free

(

SyncQueue **

sq

)

Definition at line 428 of file sync_queue.c.

Referenced by of_close().

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 351 of file sync_queue.c.

Referenced by setup_sync_queues().

sq_set_tb()

void sq_set_tb	(	SyncQueue *	sq,
		unsigned int	stream_idx,
		AVRational	tb
	)

Set the timebase for the stream with index stream_idx.

Should be called before sending any frames for this stream.

Definition at line 378 of file sync_queue.c.

Referenced by init_output_stream_encode(), and of_stream_init().

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 393 of file sync_queue.c.

Referenced by setup_sync_queues().

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 234 of file sync_queue.c.

Referenced by close_output_stream(), flush_encoders(), submit_encode_frame(), 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 339 of file sync_queue.c.

Referenced by submit_encode_frame(), and sync_queue_process().