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/*
* Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.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
*/
#ifndef AVCODEC_THREADFRAME_H
#define AVCODEC_THREADFRAME_H
#include "libavutil/frame.h"
#include "avcodec.h"
typedef struct ThreadFrame {
AVFrame *f;
AVCodecContext *owner[2];
// progress->data is an array of 2 ints holding progress for top/bottom
// fields
AVBufferRef *progress;
} ThreadFrame;
/**
* 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(ThreadFrame *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(const ThreadFrame *f, int progress, int field);
/**
* Wrapper around ff_get_buffer() for frame-multithreaded codecs.
* Call this function instead of ff_get_buffer() if you might need
* to wait for progress on this frame.
* Cannot be called after the codec has called ff_thread_finish_setup().
*
* @param avctx The current context.
* @param f The frame to write into.
* @note: It is fine to call this with codecs that do not support
* frame threading.
*/
int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags);
/**
* Unref a ThreadFrame.
*
* This is basically a wrapper around av_frame_unref() and should
* be called instead of it.
*
* @param avctx The current context.
* @param f The picture being released.
*/
void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f);
int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src);
int ff_thread_can_start_frame(AVCodecContext *avctx);
#endif
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