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90 lines
3.2 KiB
90 lines
3.2 KiB
/* |
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* Copyright (c) 2008 Alexander Strange <astrange@ithinksw.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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/** |
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* @file |
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* Multithreading API for decoders |
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* @author Alexander Strange <astrange@ithinksw.com> |
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*/ |
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#ifndef AVCODEC_THREAD_H |
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#define AVCODEC_THREAD_H |
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#include "libavutil/buffer.h" |
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#include "avcodec.h" |
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int ff_thread_can_start_frame(AVCodecContext *avctx); |
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/** |
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* If the codec defines update_thread_context(), call this |
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* when they are ready for the next thread to start decoding |
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* the next frame. After calling it, do not change any variables |
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* read by the update_thread_context() method, or call ff_thread_get_buffer(). |
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* |
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* @param avctx The context. |
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*/ |
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void ff_thread_finish_setup(AVCodecContext *avctx); |
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/** |
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* Wrapper around get_buffer() for frame-multithreaded codecs. |
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* Call this function instead of ff_get_buffer(f). |
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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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*/ |
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int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags); |
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int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx, |
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int (*action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr), |
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int (*main_func)(AVCodecContext *c), void *arg, int *ret, int job_count); |
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enum ThreadingStatus { |
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FF_THREAD_IS_COPY, |
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FF_THREAD_IS_FIRST_THREAD, |
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FF_THREAD_NO_FRAME_THREADING, |
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}; |
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/** |
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* Allows to synchronize objects whose lifetime is the whole decoding |
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* process among all frame threads. |
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* |
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* When called from a non-copy thread, do nothing. |
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* When called from another thread, place a new RefStruct reference |
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* at the given offset in the calling thread's private data from |
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* the RefStruct reference in the private data of the first decoding thread. |
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* The first thread must have a valid RefStruct reference at the given |
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* offset in its private data; the calling thread must not have |
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* a reference at this offset in its private data (must be NULL). |
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* |
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* @param avctx an AVCodecContext |
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* @param offset offset of the RefStruct reference in avctx's private data |
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* |
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* @retval FF_THREAD_IS_COPY if frame-threading is in use and the |
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* calling thread is a copy; in this case, the RefStruct reference |
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* will be set. |
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* @retval FF_THREAD_IS_MAIN_THREAD if frame-threading is in use |
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* and the calling thread is the main thread. |
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* @retval FF_THREAD_NO_FRAME_THREADING if frame-threading is not in use. |
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*/ |
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enum ThreadingStatus ff_thread_sync_ref(AVCodecContext *avctx, size_t offset); |
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#endif /* AVCODEC_THREAD_H */
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