https://github.com/eVRydayVR/ffmpeg-unwarpvr
Tip revision: e80a99182f0008c230ba03c776fe9980e9f162b6 authored by eVRydayVR on 26 September 2014, 00:46:40 UTC
Add options for scaling, one eye only, swap eyes, and eye relief dial, which skips JSON search
Add options for scaling, one eye only, swap eyes, and eye relief dial, which skips JSON search
Tip revision: e80a991
pthread.c
/*
* Copyright (c) 2004 Roman Shaposhnik
* Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com)
*
* Many thanks to Steven M. Schultz for providing clever ideas and
* to Michael Niedermayer <michaelni@gmx.at> for writing initial
* implementation.
*
* 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
* @see doc/multithreading.txt
*/
#include "avcodec.h"
#include "internal.h"
#include "pthread_internal.h"
#include "thread.h"
/**
* Set the threading algorithms used.
*
* Threading requires more than one thread.
* Frame threading requires entire frames to be passed to the codec,
* and introduces extra decoding delay, so is incompatible with low_delay.
*
* @param avctx The context.
*/
static void validate_thread_parameters(AVCodecContext *avctx)
{
int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
&& !(avctx->flags & CODEC_FLAG_TRUNCATED)
&& !(avctx->flags & CODEC_FLAG_LOW_DELAY)
&& !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
if (avctx->thread_count == 1) {
avctx->active_thread_type = 0;
} else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
avctx->active_thread_type = FF_THREAD_FRAME;
} else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
avctx->thread_type & FF_THREAD_SLICE) {
avctx->active_thread_type = FF_THREAD_SLICE;
} else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) {
avctx->thread_count = 1;
avctx->active_thread_type = 0;
}
if (avctx->thread_count > MAX_AUTO_THREADS)
av_log(avctx, AV_LOG_WARNING,
"Application has requested %d threads. Using a thread count greater than %d is not recommended.\n",
avctx->thread_count, MAX_AUTO_THREADS);
}
int ff_thread_init(AVCodecContext *avctx)
{
validate_thread_parameters(avctx);
if (avctx->active_thread_type&FF_THREAD_SLICE)
return ff_slice_thread_init(avctx);
else if (avctx->active_thread_type&FF_THREAD_FRAME)
return ff_frame_thread_init(avctx);
return 0;
}
void ff_thread_free(AVCodecContext *avctx)
{
if (avctx->active_thread_type&FF_THREAD_FRAME)
ff_frame_thread_free(avctx, avctx->thread_count);
else
ff_slice_thread_free(avctx);
}