FFmpeg/libavcodec/thread.h
Michael Niedermayer 8bc7fe4daf Merge remote-tracking branch 'qatar/master'
* qatar/master:
  doxygen: misc consistency, spelling and wording fixes
  vcr1: drop unnecessary emms_c() calls without MMX code
  Replace all uses of av_close_input_file() with avformat_close_input().
  lavf: add avformat_close_input().
  lavf: deprecate av_close_input_stream().
  lavf doxy: add some basic demuxing documentation.
  lavf doxy: add some general lavf information.
  lavf doxy: add misc utility functions to a group.
  lavf doxy: add av_guess_codec/format to the encoding group.
  lavf doxy: add core functions to a doxy group.
  Add basic libavdevice documentation.
  lavc: convert error_recognition to err_recognition.
  avconv: update -map option help text
  x86: Require 7 registers for the cabac asm
  x86: bswap: remove test for bswap instruction
  bswap: make generic implementation more compiler-friendly
  h264: remove useless cast
  proresdec: fix decode_slice() prototype

Conflicts:
	configure
	doc/APIchanges
	ffprobe.c
	libavcodec/avcodec.h
	libavcodec/celp_math.h
	libavcodec/h264.c
	libavfilter/src_movie.c
	libavformat/anm.c
	libavformat/avformat.h
	libavformat/version.h
	libavutil/avstring.h
	libavutil/bswap.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-12-13 00:39:48 +01:00

117 lines
4.1 KiB
C

/*
* Copyright (c) 2008 Alexander Strange <astrange@ithinksw.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Multithreading support functions
* @author Alexander Strange <astrange@ithinksw.com>
*/
#ifndef AVCODEC_THREAD_H
#define AVCODEC_THREAD_H
#include "config.h"
#include "avcodec.h"
/**
* Wait for decoding threads to finish and reset internal state.
* Called by avcodec_flush_buffers().
*
* @param avctx The context.
*/
void ff_thread_flush(AVCodecContext *avctx);
/**
* 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
* compatiblity with avcodec_decode_video2(). This means the decoder
* has to consume the full packet.
*
* Parameters are the same as avcodec_decode_video2().
*/
int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr, AVPacket *avpkt);
/**
* 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().
*
* @param avctx The context.
*/
void ff_thread_finish_setup(AVCodecContext *avctx);
/**
* Notify later decoding threads when part of their reference picture is ready.
* Call this when some part of the picture is finished decoding.
* Later calls with lower values of progress have no effect.
*
* @param f The picture being decoded.
* @param progress Value, in arbitrary units, of how much of the picture has decoded.
* @param field The field being decoded, for field-picture codecs.
* 0 for top field or frame pictures, 1 for bottom field.
*/
void ff_thread_report_progress(AVFrame *f, int progress, int field);
/**
* Wait for earlier decoding threads to finish reference pictures.
* Call this before accessing some part of a picture, with a given
* value for progress, and it will return after the responsible decoding
* thread calls ff_thread_report_progress() with the same or
* higher value for progress.
*
* @param f The picture being referenced.
* @param progress Value, in arbitrary units, to wait for.
* @param field The field being referenced, for field-picture codecs.
* 0 for top field or frame pictures, 1 for bottom field.
*/
void ff_thread_await_progress(AVFrame *f, int progress, int field);
/**
* Wrapper around get_buffer() for frame-multithreaded codecs.
* Call this function instead of avctx->get_buffer(f).
* Cannot be called after the codec has called ff_thread_finish_setup().
*
* @param avctx The current context.
* @param f The frame to write into.
*/
int ff_thread_get_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.
*
* @param avctx The current context.
* @param f The picture being released.
*/
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f);
int ff_thread_init(AVCodecContext *s);
void ff_thread_free(AVCodecContext *s);
#endif /* AVCODEC_THREAD_H */