#include "libavutil/buffer.h"
#include "avcodec.h"

Functions
void	ff_thread_flush (AVCodecContext *avctx)
	Wait for decoding threads to finish and reset internal state. More...

int	ff_thread_decode_frame (AVCodecContext avctx, AVFrame picture, int got_picture_ptr, AVPacket avpkt)
	Submit a new frame to a decoding thread. More...

void	ff_thread_finish_setup (AVCodecContext *avctx)
	If the codec defines update_thread_context(), call this when they are ready for the next thread to start decoding the next frame. More...

enum AVPixelFormat	ff_thread_get_format (AVCodecContext avctx, const enum AVPixelFormat fmt)
	Wrapper around get_format() for frame-multithreaded codecs. More...

int	ff_thread_get_buffer (AVCodecContext avctx, AVFrame f, int flags)
	Wrapper around get_buffer() for frame-multithreaded codecs. More...

void	ff_thread_release_buffer (AVCodecContext avctx, AVFrame f)
	Wrapper around release_buffer() frame-for multithreaded codecs. More...

int	ff_thread_init (AVCodecContext *s)

int	ff_slice_thread_execute_with_mainfunc (AVCodecContext avctx, int(action_func2)(AVCodecContext c, void arg, int jobnr, int threadnr), int(main_func)(AVCodecContext c), void arg, int ret, int job_count)

void	ff_thread_free (AVCodecContext *s)

int	ff_alloc_entries (AVCodecContext *avctx, int count)

void	ff_reset_entries (AVCodecContext *avctx)

int	ff_slice_thread_init_progress (AVCodecContext *avctx)

void	ff_thread_report_progress2 (AVCodecContext *avctx, int field, int thread, int n)

void	ff_thread_await_progress2 (AVCodecContext *avctx, int field, int thread, int shift)

Detailed Description

Multithreading support functions

Author: Alexander Strange astra.nosp@m.nge@.nosp@m.ithin.nosp@m.ksw..nosp@m.com

Definition in file thread.h.

Function Documentation

◆ ff_thread_flush()

void ff_thread_flush ( AVCodecContext * avctx )

Wait for decoding threads to finish and reset internal state.

Called by avcodec_flush_buffers().

Parameters

avctx The context.

Definition at line 902 of file pthread_frame.c.

Referenced by avcodec_flush_buffers().

◆ ff_thread_decode_frame()

int ff_thread_decode_frame	(	AVCodecContext *	avctx,
		AVFrame *	picture,
		int *	got_picture_ptr,
		AVPacket *	avpkt
	)

Submit a new frame to a decoding thread.

Returns the next available frame in picture. *got_picture_ptr will be 0 if none is available. The return value on success is the size of the consumed packet for compatibility with FFCodec.decode. This means the decoder has to consume the full packet.

Parameters are the same as FFCodec.decode.

Definition at line 510 of file pthread_frame.c.

Referenced by decode_simple_internal().

◆ ff_thread_finish_setup()

void ff_thread_finish_setup ( AVCodecContext * avctx )

If the codec defines update_thread_context(), call this when they are ready for the next thread to start decoding the next frame.

After calling it, do not change any variables read by the update_thread_context() method, or call ff_thread_get_buffer().

Parameters

avctx The context.

Definition at line 639 of file pthread_frame.c.

Referenced by frame_worker_thread(), and thread_get_buffer_internal().

◆ ff_thread_get_format()

enum AVPixelFormat ff_thread_get_format	(	AVCodecContext *	avctx,
		const enum AVPixelFormat *	fmt
	)

Wrapper around get_format() for frame-multithreaded codecs.

Call this function instead of avctx->get_format(). Cannot be called after the codec has called ff_thread_finish_setup().

Parameters

avctx	The current context.
fmt	The list of available formats.

Definition at line 1005 of file pthread_frame.c.

Referenced by decode_frame_header(), get_format(), get_pixel_format(), mpeg_get_pixelformat(), and update_size().

◆ ff_thread_get_buffer()

int ff_thread_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	f,
		int	flags
	)

Wrapper around get_buffer() for frame-multithreaded codecs.

Call this function instead of ff_get_buffer(f). Cannot be called after the codec has called ff_thread_finish_setup().

Parameters

avctx	The current context.
f	The frame to write into.

Definition at line 1035 of file pthread_frame.c.

Referenced by ff_thread_get_ext_buffer().

◆ ff_thread_release_buffer()

void ff_thread_release_buffer	(	AVCodecContext *	avctx,
		AVFrame *	f
	)

Wrapper around release_buffer() frame-for multithreaded codecs.

Call this function instead of avctx->release_buffer(f). The AVFrame will be copied and the actual release_buffer() call will be performed later. The contents of data pointed to by the AVFrame should not be changed until ff_thread_get_buffer() is called on it.

Parameters

avctx	The current context.
f	The picture being released.

Definition at line 1074 of file pthread_frame.c.

Referenced by av1_frame_unref(), ff_h264_replace_picture(), ff_h264_unref_picture(), ff_hevc_unref_frame(), ff_thread_release_ext_buffer(), frame_worker_thread(), vaapi_av1_decode_uninit(), and vaapi_av1_end_frame().

◆ ff_thread_init()

int ff_thread_init ( AVCodecContext * s )

Definition at line 74 of file pthread.c.

Referenced by avcodec_open2().

◆ ff_slice_thread_execute_with_mainfunc()

int ff_slice_thread_execute_with_mainfunc	(	AVCodecContext *	avctx,
		int()(AVCodecContext c, void *arg, int jobnr, int threadnr)	action_func2,
		int()(AVCodecContext c)	main_func,
		void *	arg,
		int *	ret,
		int	job_count
	)