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/*
* 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 "libavutil/buffer.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);
/*
* The receive_frame implementation for frame threading. Submit available
* packets for decoding to worker threads, return a decoded frame if available.
*/
int ff_thread_receive_frame(AVCodecContext *avctx, AVFrame *frame);
/**
* 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);
#if FF_API_THREAD_SAFE_CALLBACKS
/**
* 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().
*
* @param avctx The current context.
* @param fmt The list of available formats.
*/
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);
#else
#define ff_thread_get_format ff_get_format
#endif
/**
* 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().
*
* @param avctx The current context.
* @param f The frame to write into.
*/
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags);
/**
* 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);
/**
* Get a packet for decoding. This gets invoked by the worker threads.
*/
int ff_thread_get_packet(AVCodecContext *avctx, AVPacket *pkt);
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_slice_thread_allocz_entries(AVCodecContext *avctx, int count);
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);
#endif /* AVCODEC_THREAD_H */
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