Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2008 Alexander Strange |
||
| 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 | /** |
||
| 22 | * @file |
||
| 23 | * Multithreading support functions |
||
| 24 | * @author Alexander Strange |
||
| 25 | */ |
||
| 26 | |||
| 27 | #ifndef AVCODEC_THREAD_H |
||
| 28 | #define AVCODEC_THREAD_H |
||
| 29 | |||
| 30 | #include "libavutil/buffer.h" |
||
| 31 | |||
| 32 | #include "config.h" |
||
| 33 | #include "avcodec.h" |
||
| 34 | |||
| 35 | typedef struct ThreadFrame { |
||
| 36 | AVFrame *f; |
||
| 37 | AVCodecContext *owner; |
||
| 38 | // progress->data is an array of 2 ints holding progress for top/bottom |
||
| 39 | // fields |
||
| 40 | AVBufferRef *progress; |
||
| 41 | } ThreadFrame; |
||
| 42 | |||
| 43 | /** |
||
| 44 | * Wait for decoding threads to finish and reset internal state. |
||
| 45 | * Called by avcodec_flush_buffers(). |
||
| 46 | * |
||
| 47 | * @param avctx The context. |
||
| 48 | */ |
||
| 49 | void ff_thread_flush(AVCodecContext *avctx); |
||
| 50 | |||
| 51 | /** |
||
| 52 | * Submit a new frame to a decoding thread. |
||
| 53 | * Returns the next available frame in picture. *got_picture_ptr |
||
| 54 | * will be 0 if none is available. |
||
| 55 | * The return value on success is the size of the consumed packet for |
||
| 56 | * compatibility with avcodec_decode_video2(). This means the decoder |
||
| 57 | * has to consume the full packet. |
||
| 58 | * |
||
| 59 | * Parameters are the same as avcodec_decode_video2(). |
||
| 60 | */ |
||
| 61 | int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture, |
||
| 62 | int *got_picture_ptr, AVPacket *avpkt); |
||
| 63 | |||
| 64 | /** |
||
| 65 | * If the codec defines update_thread_context(), call this |
||
| 66 | * when they are ready for the next thread to start decoding |
||
| 67 | * the next frame. After calling it, do not change any variables |
||
| 68 | * read by the update_thread_context() method, or call ff_thread_get_buffer(). |
||
| 69 | * |
||
| 70 | * @param avctx The context. |
||
| 71 | */ |
||
| 72 | void ff_thread_finish_setup(AVCodecContext *avctx); |
||
| 73 | |||
| 74 | /** |
||
| 75 | * Notify later decoding threads when part of their reference picture is ready. |
||
| 76 | * Call this when some part of the picture is finished decoding. |
||
| 77 | * Later calls with lower values of progress have no effect. |
||
| 78 | * |
||
| 79 | * @param f The picture being decoded. |
||
| 80 | * @param progress Value, in arbitrary units, of how much of the picture has decoded. |
||
| 81 | * @param field The field being decoded, for field-picture codecs. |
||
| 82 | * 0 for top field or frame pictures, 1 for bottom field. |
||
| 83 | */ |
||
| 84 | void ff_thread_report_progress(ThreadFrame *f, int progress, int field); |
||
| 85 | |||
| 86 | /** |
||
| 87 | * Wait for earlier decoding threads to finish reference pictures. |
||
| 88 | * Call this before accessing some part of a picture, with a given |
||
| 89 | * value for progress, and it will return after the responsible decoding |
||
| 90 | * thread calls ff_thread_report_progress() with the same or |
||
| 91 | * higher value for progress. |
||
| 92 | * |
||
| 93 | * @param f The picture being referenced. |
||
| 94 | * @param progress Value, in arbitrary units, to wait for. |
||
| 95 | * @param field The field being referenced, for field-picture codecs. |
||
| 96 | * 0 for top field or frame pictures, 1 for bottom field. |
||
| 97 | */ |
||
| 98 | void ff_thread_await_progress(ThreadFrame *f, int progress, int field); |
||
| 99 | |||
| 100 | /** |
||
| 101 | * Wrapper around get_format() for frame-multithreaded codecs. |
||
| 102 | * Call this function instead of avctx->get_format(). |
||
| 103 | * Cannot be called after the codec has called ff_thread_finish_setup(). |
||
| 104 | * |
||
| 105 | * @param avctx The current context. |
||
| 106 | * @param fmt The list of available formats. |
||
| 107 | */ |
||
| 108 | enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); |
||
| 109 | |||
| 110 | /** |
||
| 111 | * Wrapper around get_buffer() for frame-multithreaded codecs. |
||
| 112 | * Call this function instead of ff_get_buffer(f). |
||
| 113 | * Cannot be called after the codec has called ff_thread_finish_setup(). |
||
| 114 | * |
||
| 115 | * @param avctx The current context. |
||
| 116 | * @param f The frame to write into. |
||
| 117 | */ |
||
| 118 | int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags); |
||
| 119 | |||
| 120 | /** |
||
| 121 | * Wrapper around release_buffer() frame-for multithreaded codecs. |
||
| 122 | * Call this function instead of avctx->release_buffer(f). |
||
| 123 | * The AVFrame will be copied and the actual release_buffer() call |
||
| 124 | * will be performed later. The contents of data pointed to by the |
||
| 125 | * AVFrame should not be changed until ff_thread_get_buffer() is called |
||
| 126 | * on it. |
||
| 127 | * |
||
| 128 | * @param avctx The current context. |
||
| 129 | * @param f The picture being released. |
||
| 130 | */ |
||
| 131 | void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f); |
||
| 132 | |||
| 133 | int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src); |
||
| 134 | |||
| 135 | int ff_thread_init(AVCodecContext *s); |
||
| 136 | void ff_thread_free(AVCodecContext *s); |
||
| 137 | |||
| 138 | int ff_alloc_entries(AVCodecContext *avctx, int count); |
||
| 139 | void ff_reset_entries(AVCodecContext *avctx); |
||
| 140 | void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n); |
||
| 141 | void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift); |
||
| 142 | |||
| 143 | #endif /* AVCODEC_THREAD_H */ |