0,0 → 1,143 |
/* |
* 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 "config.h" |
#include "avcodec.h" |
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typedef struct ThreadFrame { |
AVFrame *f; |
AVCodecContext *owner; |
// progress->data is an array of 2 ints holding progress for top/bottom |
// fields |
AVBufferRef *progress; |
} ThreadFrame; |
|
/** |
* 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 avcodec_decode_video2(). This means the decoder |
* has to consume the full packet. |
* |
* Parameters are the same as avcodec_decode_video2(). |
*/ |
int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture, |
int *got_picture_ptr, AVPacket *avpkt); |
|
/** |
* 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); |
|
/** |
* Notify later decoding threads when part of their reference picture is ready. |
* Call this when some part of the picture is finished decoding. |
* Later calls with lower values of progress have no effect. |
* |
* @param f The picture being decoded. |
* @param progress Value, in arbitrary units, of how much of the picture has decoded. |
* @param field The field being decoded, for field-picture codecs. |
* 0 for top field or frame pictures, 1 for bottom field. |
*/ |
void ff_thread_report_progress(ThreadFrame *f, int progress, int field); |
|
/** |
* Wait for earlier decoding threads to finish reference pictures. |
* Call this before accessing some part of a picture, with a given |
* value for progress, and it will return after the responsible decoding |
* thread calls ff_thread_report_progress() with the same or |
* higher value for progress. |
* |
* @param f The picture being referenced. |
* @param progress Value, in arbitrary units, to wait for. |
* @param field The field being referenced, for field-picture codecs. |
* 0 for top field or frame pictures, 1 for bottom field. |
*/ |
void ff_thread_await_progress(ThreadFrame *f, int progress, int field); |
|
/** |
* Wrapper around get_format() for frame-multithreaded codecs. |
* Call this function instead of avctx->get_format(). |
* Cannot be called after the codec has called ff_thread_finish_setup(). |
* |
* @param avctx The current context. |
* @param fmt The list of available formats. |
*/ |
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt); |
|
/** |
* 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, ThreadFrame *f, int flags); |
|
/** |
* Wrapper around release_buffer() frame-for multithreaded codecs. |
* Call this function instead of avctx->release_buffer(f). |
* The AVFrame will be copied and the actual release_buffer() call |
* will be performed later. The contents of data pointed to by the |
* AVFrame should not be changed until ff_thread_get_buffer() is called |
* on it. |
* |
* @param avctx The current context. |
* @param f The picture being released. |
*/ |
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f); |
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int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src); |
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int ff_thread_init(AVCodecContext *s); |
void ff_thread_free(AVCodecContext *s); |
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int ff_alloc_entries(AVCodecContext *avctx, int count); |
void ff_reset_entries(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); |
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#endif /* AVCODEC_THREAD_H */ |