2 * Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_THREADFRAME_H
22 #define AVCODEC_THREADFRAME_H
24 #include "libavutil/frame.h"
27 typedef struct ThreadFrame {
29 AVCodecContext *owner[2];
30 struct ThreadFrameProgress *progress;
34 * Notify later decoding threads when part of their reference picture is ready.
35 * Call this when some part of the picture is finished decoding.
36 * Later calls with lower values of progress have no effect.
38 * @param f The picture being decoded.
39 * @param progress Value, in arbitrary units, of how much of the picture has decoded.
40 * @param field The field being decoded, for field-picture codecs.
41 * 0 for top field or frame pictures, 1 for bottom field.
43 void ff_thread_report_progress(ThreadFrame *f, int progress, int field);
46 * Wait for earlier decoding threads to finish reference pictures.
47 * Call this before accessing some part of a picture, with a given
48 * value for progress, and it will return after the responsible decoding
49 * thread calls ff_thread_report_progress() with the same or
50 * higher value for progress.
52 * @param f The picture being referenced.
53 * @param progress Value, in arbitrary units, to wait for.
54 * @param field The field being referenced, for field-picture codecs.
55 * 0 for top field or frame pictures, 1 for bottom field.
57 void ff_thread_await_progress(const ThreadFrame *f, int progress, int field);
60 * Wrapper around ff_get_buffer() for frame-multithreaded codecs.
61 * Call this function instead of ff_get_buffer() if you might need
62 * to wait for progress on this frame.
63 * Cannot be called after the codec has called ff_thread_finish_setup().
65 * @param avctx The current context.
66 * @param f The frame to write into.
67 * @note: It is fine to call this with codecs that do not support
70 int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags);
73 * Unref a ThreadFrame.
75 * This is basically a wrapper around av_frame_unref() and should
76 * be called instead of it.
78 * @param avctx The current context.
79 * @param f The picture being released.
81 void ff_thread_release_ext_buffer(ThreadFrame *f);
83 int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src);
85 int ff_thread_replace_frame(ThreadFrame *dst, const ThreadFrame *src);