mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
9dc8f8839e
This is useful when the lifetime of the object to be shared is the whole decoding process as it allows to avoid having to sync them every time in update_thread_context. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
118 lines
4.3 KiB
C
118 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2008 Alexander Strange <astrange@ithinksw.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Multithreading support functions
|
|
* @author Alexander Strange <astrange@ithinksw.com>
|
|
*/
|
|
|
|
#ifndef AVCODEC_THREAD_H
|
|
#define AVCODEC_THREAD_H
|
|
|
|
#include "libavutil/buffer.h"
|
|
|
|
#include "avcodec.h"
|
|
|
|
/**
|
|
* Wait for decoding threads to finish and reset internal state.
|
|
* Called by avcodec_flush_buffers().
|
|
*
|
|
* @param avctx The context.
|
|
*/
|
|
void ff_thread_flush(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Submit a new frame to a decoding thread.
|
|
* Returns the next available frame in picture. *got_picture_ptr
|
|
* will be 0 if none is available.
|
|
* The return value on success is the size of the consumed packet for
|
|
* compatibility with FFCodec.decode. This means the decoder
|
|
* has to consume the full packet.
|
|
*
|
|
* Parameters are the same as FFCodec.decode.
|
|
*/
|
|
int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture,
|
|
int *got_picture_ptr, AVPacket *avpkt);
|
|
|
|
int ff_thread_can_start_frame(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* If the codec defines update_thread_context(), call this
|
|
* when they are ready for the next thread to start decoding
|
|
* the next frame. After calling it, do not change any variables
|
|
* read by the update_thread_context() method, or call ff_thread_get_buffer().
|
|
*
|
|
* @param avctx The context.
|
|
*/
|
|
void ff_thread_finish_setup(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Wrapper around get_buffer() for frame-multithreaded codecs.
|
|
* Call this function instead of ff_get_buffer(f).
|
|
* Cannot be called after the codec has called ff_thread_finish_setup().
|
|
*
|
|
* @param avctx The current context.
|
|
* @param f The frame to write into.
|
|
*/
|
|
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags);
|
|
|
|
int ff_thread_init(AVCodecContext *s);
|
|
int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx,
|
|
int (*action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr),
|
|
int (*main_func)(AVCodecContext *c), void *arg, int *ret, int job_count);
|
|
void ff_thread_free(AVCodecContext *s);
|
|
int ff_slice_thread_allocz_entries(AVCodecContext *avctx, int count);
|
|
int ff_slice_thread_init_progress(AVCodecContext *avctx);
|
|
void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n);
|
|
void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift);
|
|
|
|
enum ThreadingStatus {
|
|
FF_THREAD_IS_COPY,
|
|
FF_THREAD_IS_FIRST_THREAD,
|
|
FF_THREAD_NO_FRAME_THREADING,
|
|
};
|
|
|
|
/**
|
|
* Allows to synchronize objects whose lifetime is the whole decoding
|
|
* process among all frame threads.
|
|
*
|
|
* When called from a non-copy thread, do nothing.
|
|
* When called from another thread, place a new RefStruct reference
|
|
* at the given offset in the calling thread's private data from
|
|
* the RefStruct reference in the private data of the first decoding thread.
|
|
* The first thread must have a valid RefStruct reference at the given
|
|
* offset in its private data; the calling thread must not have
|
|
* a reference at this offset in its private data (must be NULL).
|
|
*
|
|
* @param avctx an AVCodecContext
|
|
* @param offset offset of the RefStruct reference in avctx's private data
|
|
*
|
|
* @retval FF_THREAD_IS_COPY if frame-threading is in use and the
|
|
* calling thread is a copy; in this case, the RefStruct reference
|
|
* will be set.
|
|
* @retval FF_THREAD_IS_MAIN_THREAD if frame-threading is in use
|
|
* and the calling thread is the main thread.
|
|
* @retval FF_THREAD_NO_FRAME_THREADING if frame-threading is not in use.
|
|
*/
|
|
enum ThreadingStatus ff_thread_sync_ref(AVCodecContext *avctx, size_t offset);
|
|
|
|
#endif /* AVCODEC_THREAD_H */
|