tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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threadframe.h (3156B)

      1 /*
      2 * Copyright (c) 2022 Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
      3 *
      4 * This file is part of FFmpeg.
      5 *
      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.
     10 *
     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.
     15 *
     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
     19 */
     20 
     21 #ifndef AVCODEC_THREADFRAME_H
     22 #define AVCODEC_THREADFRAME_H
     23 
     24 #include "libavutil/frame.h"
     25 #include "avcodec.h"
     26 
     27 typedef struct ThreadFrame {
     28    AVFrame *f;
     29    AVCodecContext *owner[2];
     30    struct ThreadFrameProgress *progress;
     31 } ThreadFrame;
     32 
     33 /**
     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.
     37 *
     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.
     42 */
     43 void ff_thread_report_progress(ThreadFrame *f, int progress, int field);
     44 
     45 /**
     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.
     51 *
     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.
     56 */
     57 void ff_thread_await_progress(const ThreadFrame *f, int progress, int field);
     58 
     59 /**
     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().
     64 *
     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
     68 *        frame threading.
     69 */
     70 int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags);
     71 
     72 /**
     73 * Unref a ThreadFrame.
     74 *
     75 * This is basically a wrapper around av_frame_unref() and should
     76 * be called instead of it.
     77 *
     78 * @param avctx The current context.
     79 * @param f The picture being released.
     80 */
     81 void ff_thread_release_ext_buffer(ThreadFrame *f);
     82 
     83 int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src);
     84 
     85 int ff_thread_replace_frame(ThreadFrame *dst, const ThreadFrame *src);
     86 
     87 #endif