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90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
/*
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* Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_THREADFRAME_H
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#define AVCODEC_THREADFRAME_H
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#include "libavutil/frame.h"
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#include "avcodec.h"
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typedef struct ThreadFrame {
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AVFrame *f;
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AVCodecContext *owner[2];
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// progress->data is an array of 2 ints holding progress for top/bottom
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// fields
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AVBufferRef *progress;
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} ThreadFrame;
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/**
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* Notify later decoding threads when part of their reference picture is ready.
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* Call this when some part of the picture is finished decoding.
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* Later calls with lower values of progress have no effect.
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*
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* @param f The picture being decoded.
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* @param progress Value, in arbitrary units, of how much of the picture has decoded.
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* @param field The field being decoded, for field-picture codecs.
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* 0 for top field or frame pictures, 1 for bottom field.
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*/
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void ff_thread_report_progress(ThreadFrame *f, int progress, int field);
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/**
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* Wait for earlier decoding threads to finish reference pictures.
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* Call this before accessing some part of a picture, with a given
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* value for progress, and it will return after the responsible decoding
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* thread calls ff_thread_report_progress() with the same or
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* higher value for progress.
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*
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* @param f The picture being referenced.
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* @param progress Value, in arbitrary units, to wait for.
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* @param field The field being referenced, for field-picture codecs.
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* 0 for top field or frame pictures, 1 for bottom field.
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*/
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void ff_thread_await_progress(const ThreadFrame *f, int progress, int field);
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/**
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* Wrapper around ff_get_buffer() for frame-multithreaded codecs.
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* Call this function instead of ff_get_buffer() if you might need
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* to wait for progress on this frame.
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* Cannot be called after the codec has called ff_thread_finish_setup().
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*
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* @param avctx The current context.
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* @param f The frame to write into.
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* @note: It is fine to call this with codecs that do not support
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* frame threading.
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*/
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int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags);
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/**
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* Unref a ThreadFrame.
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*
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* This is basically a wrapper around av_frame_unref() and should
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* be called instead of it.
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*
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* @param avctx The current context.
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* @param f The picture being released.
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*/
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void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f);
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int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src);
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int ff_thread_can_start_frame(AVCodecContext *avctx);
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#endif
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