mirror of
https://github.com/FFmpeg/FFmpeg.git
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b548f2b91b
changes within 1 month after my warning so they are officially no longer experimental and we will gurantee decodeability of files encoded with the currenzt ffv1/ffvhuff in the future Originally committed as revision 5288 to svn://svn.ffmpeg.org/ffmpeg/trunk
1038 lines
30 KiB
C
1038 lines
30 KiB
C
/*
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* FFV1 codec for libavcodec
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*
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; 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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/**
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* @file ffv1.c
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* FF Video Codec 1 (an experimental lossless codec)
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*/
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#include "common.h"
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#include "bitstream.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "rangecoder.h"
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#include "golomb.h"
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#define MAX_PLANES 4
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#define CONTEXT_SIZE 32
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static const int8_t quant3[256]={
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0,
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};
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static const int8_t quant5[256]={
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0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,
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};
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static const int8_t quant7[256]={
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0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,
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};
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static const int8_t quant9[256]={
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0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,
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};
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static const int8_t quant11[256]={
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0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
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-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,
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};
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static const int8_t quant13[256]={
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0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,
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};
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static const uint8_t log2_run[32]={
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0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
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4, 4, 5, 5, 6, 6, 7, 7,
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8, 9,10,11,12,13,14,15,
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};
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typedef struct VlcState{
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int16_t drift;
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uint16_t error_sum;
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int8_t bias;
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uint8_t count;
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} VlcState;
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typedef struct PlaneContext{
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int context_count;
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uint8_t (*state)[CONTEXT_SIZE];
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VlcState *vlc_state;
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uint8_t interlace_bit_state[2];
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} PlaneContext;
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typedef struct FFV1Context{
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AVCodecContext *avctx;
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RangeCoder c;
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GetBitContext gb;
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PutBitContext pb;
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int version;
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int width, height;
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int chroma_h_shift, chroma_v_shift;
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int flags;
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int picture_number;
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AVFrame picture;
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int plane_count;
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int ac; ///< 1-> CABAC 0-> golomb rice
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PlaneContext plane[MAX_PLANES];
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int16_t quant_table[5][256];
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int run_index;
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int colorspace;
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DSPContext dsp;
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}FFV1Context;
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static always_inline int fold(int diff, int bits){
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if(bits==8)
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diff= (int8_t)diff;
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else{
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diff+= 1<<(bits-1);
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diff&=(1<<bits)-1;
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diff-= 1<<(bits-1);
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}
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return diff;
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}
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static inline int predict(int_fast16_t *src, int_fast16_t *last){
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const int LT= last[-1];
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const int T= last[ 0];
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const int L = src[-1];
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return mid_pred(L, L + T - LT, T);
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}
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static inline int get_context(FFV1Context *f, int_fast16_t *src, int_fast16_t *last, int_fast16_t *last2){
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const int LT= last[-1];
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const int T= last[ 0];
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const int RT= last[ 1];
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const int L = src[-1];
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if(f->quant_table[3][127]){
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const int TT= last2[0];
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const int LL= src[-2];
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return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF]
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+f->quant_table[3][(LL-L) & 0xFF] + f->quant_table[4][(TT-T) & 0xFF];
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}else
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return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF];
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}
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static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
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int i;
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if(v){
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const int a= ABS(v);
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const int e= av_log2(a);
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put_rac(c, state+0, 0);
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assert(e<=9);
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for(i=0; i<e; i++){
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put_rac(c, state+1+i, 1); //1..10
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}
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put_rac(c, state+1+i, 0);
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for(i=e-1; i>=0; i--){
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put_rac(c, state+22+i, (a>>i)&1); //22..31
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}
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if(is_signed)
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put_rac(c, state+11 + e, v < 0); //11..21
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}else{
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put_rac(c, state+0, 1);
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}
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}
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static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
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if(get_rac(c, state+0))
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return 0;
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else{
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int i, e, a;
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e= 0;
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while(get_rac(c, state+1 + e)){ //1..10
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e++;
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}
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assert(e<=9);
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a= 1;
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for(i=e-1; i>=0; i--){
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a += a + get_rac(c, state+22 + i); //22..31
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}
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if(is_signed && get_rac(c, state+11 + e)) //11..21
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return -a;
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else
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return a;
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}
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}
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static inline void update_vlc_state(VlcState * const state, const int v){
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int drift= state->drift;
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int count= state->count;
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state->error_sum += ABS(v);
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drift += v;
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if(count == 128){ //FIXME variable
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count >>= 1;
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drift >>= 1;
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state->error_sum >>= 1;
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}
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count++;
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if(drift <= -count){
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if(state->bias > -128) state->bias--;
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drift += count;
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if(drift <= -count)
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drift= -count + 1;
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}else if(drift > 0){
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if(state->bias < 127) state->bias++;
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drift -= count;
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if(drift > 0)
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drift= 0;
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}
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state->drift= drift;
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state->count= count;
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}
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static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v, int bits){
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int i, k, code;
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//printf("final: %d ", v);
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v = fold(v - state->bias, bits);
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i= state->count;
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k=0;
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while(i < state->error_sum){ //FIXME optimize
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k++;
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i += i;
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}
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assert(k<=8);
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#if 0 // JPEG LS
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if(k==0 && 2*state->drift <= - state->count) code= v ^ (-1);
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else code= v;
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#else
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code= v ^ ((2*state->drift + state->count)>>31);
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#endif
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//printf("v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code, state->bias, state->error_sum, state->drift, state->count, k);
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set_sr_golomb(pb, code, k, 12, bits);
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update_vlc_state(state, v);
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}
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static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int bits){
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int k, i, v, ret;
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i= state->count;
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k=0;
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while(i < state->error_sum){ //FIXME optimize
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k++;
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i += i;
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}
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assert(k<=8);
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v= get_sr_golomb(gb, k, 12, bits);
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//printf("v:%d bias:%d error:%d drift:%d count:%d k:%d", v, state->bias, state->error_sum, state->drift, state->count, k);
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#if 0 // JPEG LS
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if(k==0 && 2*state->drift <= - state->count) v ^= (-1);
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#else
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v ^= ((2*state->drift + state->count)>>31);
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#endif
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ret= fold(v + state->bias, bits);
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update_vlc_state(state, v);
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//printf("final: %d\n", ret);
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return ret;
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}
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static inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
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PlaneContext * const p= &s->plane[plane_index];
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RangeCoder * const c= &s->c;
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int x;
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int run_index= s->run_index;
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int run_count=0;
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int run_mode=0;
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|
|
if(s->ac){
|
|
if(c->bytestream_end - c->bytestream < w*20){
|
|
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
|
|
return -1;
|
|
}
|
|
}else{
|
|
if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < w*4){
|
|
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
for(x=0; x<w; x++){
|
|
int diff, context;
|
|
|
|
context= get_context(s, sample[0]+x, sample[1]+x, sample[2]+x);
|
|
diff= sample[0][x] - predict(sample[0]+x, sample[1]+x);
|
|
|
|
if(context < 0){
|
|
context = -context;
|
|
diff= -diff;
|
|
}
|
|
|
|
diff= fold(diff, bits);
|
|
|
|
if(s->ac){
|
|
put_symbol(c, p->state[context], diff, 1);
|
|
}else{
|
|
if(context == 0) run_mode=1;
|
|
|
|
if(run_mode){
|
|
|
|
if(diff){
|
|
while(run_count >= 1<<log2_run[run_index]){
|
|
run_count -= 1<<log2_run[run_index];
|
|
run_index++;
|
|
put_bits(&s->pb, 1, 1);
|
|
}
|
|
|
|
put_bits(&s->pb, 1 + log2_run[run_index], run_count);
|
|
if(run_index) run_index--;
|
|
run_count=0;
|
|
run_mode=0;
|
|
if(diff>0) diff--;
|
|
}else{
|
|
run_count++;
|
|
}
|
|
}
|
|
|
|
// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, (int)put_bits_count(&s->pb));
|
|
|
|
if(run_mode == 0)
|
|
put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits);
|
|
}
|
|
}
|
|
if(run_mode){
|
|
while(run_count >= 1<<log2_run[run_index]){
|
|
run_count -= 1<<log2_run[run_index];
|
|
run_index++;
|
|
put_bits(&s->pb, 1, 1);
|
|
}
|
|
|
|
if(run_count)
|
|
put_bits(&s->pb, 1, 1);
|
|
}
|
|
s->run_index= run_index;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){
|
|
int x,y,i;
|
|
const int ring_size= s->avctx->context_model ? 3 : 2;
|
|
int_fast16_t sample_buffer[ring_size][w+6], *sample[ring_size];
|
|
s->run_index=0;
|
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer));
|
|
|
|
for(y=0; y<h; y++){
|
|
for(i=0; i<ring_size; i++)
|
|
sample[i]= sample_buffer[(h+i-y)%ring_size]+3;
|
|
|
|
sample[0][-1]= sample[1][0 ];
|
|
sample[1][ w]= sample[1][w-1];
|
|
//{START_TIMER
|
|
for(x=0; x<w; x++){
|
|
sample[0][x]= src[x + stride*y];
|
|
}
|
|
encode_line(s, w, sample, plane_index, 8);
|
|
//STOP_TIMER("encode line")}
|
|
}
|
|
}
|
|
|
|
static void encode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){
|
|
int x, y, p, i;
|
|
const int ring_size= s->avctx->context_model ? 3 : 2;
|
|
int_fast16_t sample_buffer[3][ring_size][w+6], *sample[3][ring_size];
|
|
s->run_index=0;
|
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer));
|
|
|
|
for(y=0; y<h; y++){
|
|
for(i=0; i<ring_size; i++)
|
|
for(p=0; p<3; p++)
|
|
sample[p][i]= sample_buffer[p][(h+i-y)%ring_size]+3;
|
|
|
|
for(x=0; x<w; x++){
|
|
int v= src[x + stride*y];
|
|
int b= v&0xFF;
|
|
int g= (v>>8)&0xFF;
|
|
int r= (v>>16)&0xFF;
|
|
|
|
b -= g;
|
|
r -= g;
|
|
g += (b + r)>>2;
|
|
b += 0x100;
|
|
r += 0x100;
|
|
|
|
// assert(g>=0 && b>=0 && r>=0);
|
|
// assert(g<256 && b<512 && r<512);
|
|
sample[0][0][x]= g;
|
|
sample[1][0][x]= b;
|
|
sample[2][0][x]= r;
|
|
}
|
|
for(p=0; p<3; p++){
|
|
sample[p][0][-1]= sample[p][1][0 ];
|
|
sample[p][1][ w]= sample[p][1][w-1];
|
|
encode_line(s, w, sample[p], FFMIN(p, 1), 9);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void write_quant_table(RangeCoder *c, int16_t *quant_table){
|
|
int last=0;
|
|
int i;
|
|
uint8_t state[CONTEXT_SIZE];
|
|
memset(state, 128, sizeof(state));
|
|
|
|
for(i=1; i<128 ; i++){
|
|
if(quant_table[i] != quant_table[i-1]){
|
|
put_symbol(c, state, i-last-1, 0);
|
|
last= i;
|
|
}
|
|
}
|
|
put_symbol(c, state, i-last-1, 0);
|
|
}
|
|
|
|
static void write_header(FFV1Context *f){
|
|
uint8_t state[CONTEXT_SIZE];
|
|
int i;
|
|
RangeCoder * const c= &f->c;
|
|
|
|
memset(state, 128, sizeof(state));
|
|
|
|
put_symbol(c, state, f->version, 0);
|
|
put_symbol(c, state, f->avctx->coder_type, 0);
|
|
put_symbol(c, state, f->colorspace, 0); //YUV cs type
|
|
put_rac(c, state, 1); //chroma planes
|
|
put_symbol(c, state, f->chroma_h_shift, 0);
|
|
put_symbol(c, state, f->chroma_v_shift, 0);
|
|
put_rac(c, state, 0); //no transparency plane
|
|
|
|
for(i=0; i<5; i++)
|
|
write_quant_table(c, f->quant_table[i]);
|
|
}
|
|
|
|
static int common_init(AVCodecContext *avctx){
|
|
FFV1Context *s = avctx->priv_data;
|
|
int width, height;
|
|
|
|
s->avctx= avctx;
|
|
s->flags= avctx->flags;
|
|
|
|
dsputil_init(&s->dsp, avctx);
|
|
|
|
width= s->width= avctx->width;
|
|
height= s->height= avctx->height;
|
|
|
|
assert(width && height);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int encode_init(AVCodecContext *avctx)
|
|
{
|
|
FFV1Context *s = avctx->priv_data;
|
|
int i;
|
|
|
|
common_init(avctx);
|
|
|
|
s->version=0;
|
|
s->ac= avctx->coder_type;
|
|
|
|
s->plane_count=2;
|
|
for(i=0; i<256; i++){
|
|
s->quant_table[0][i]= quant11[i];
|
|
s->quant_table[1][i]= 11*quant11[i];
|
|
if(avctx->context_model==0){
|
|
s->quant_table[2][i]= 11*11*quant11[i];
|
|
s->quant_table[3][i]=
|
|
s->quant_table[4][i]=0;
|
|
}else{
|
|
s->quant_table[2][i]= 11*11*quant5 [i];
|
|
s->quant_table[3][i]= 5*11*11*quant5 [i];
|
|
s->quant_table[4][i]= 5*5*11*11*quant5 [i];
|
|
}
|
|
}
|
|
|
|
for(i=0; i<s->plane_count; i++){
|
|
PlaneContext * const p= &s->plane[i];
|
|
|
|
if(avctx->context_model==0){
|
|
p->context_count= (11*11*11+1)/2;
|
|
}else{
|
|
p->context_count= (11*11*5*5*5+1)/2;
|
|
}
|
|
|
|
if(s->ac){
|
|
if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t));
|
|
}else{
|
|
if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));
|
|
}
|
|
}
|
|
|
|
avctx->coded_frame= &s->picture;
|
|
switch(avctx->pix_fmt){
|
|
case PIX_FMT_YUV444P:
|
|
case PIX_FMT_YUV422P:
|
|
case PIX_FMT_YUV420P:
|
|
case PIX_FMT_YUV411P:
|
|
case PIX_FMT_YUV410P:
|
|
s->colorspace= 0;
|
|
break;
|
|
case PIX_FMT_RGBA32:
|
|
s->colorspace= 1;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "format not supported\n");
|
|
return -1;
|
|
}
|
|
avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
|
|
|
|
s->picture_number=0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void clear_state(FFV1Context *f){
|
|
int i, j;
|
|
|
|
for(i=0; i<f->plane_count; i++){
|
|
PlaneContext *p= &f->plane[i];
|
|
|
|
p->interlace_bit_state[0]= 128;
|
|
p->interlace_bit_state[1]= 128;
|
|
|
|
for(j=0; j<p->context_count; j++){
|
|
if(f->ac){
|
|
memset(p->state[j], 128, sizeof(uint8_t)*CONTEXT_SIZE);
|
|
}else{
|
|
p->vlc_state[j].drift= 0;
|
|
p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);
|
|
p->vlc_state[j].bias= 0;
|
|
p->vlc_state[j].count= 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
|
|
FFV1Context *f = avctx->priv_data;
|
|
RangeCoder * const c= &f->c;
|
|
AVFrame *pict = data;
|
|
const int width= f->width;
|
|
const int height= f->height;
|
|
AVFrame * const p= &f->picture;
|
|
int used_count= 0;
|
|
uint8_t keystate=128;
|
|
|
|
ff_init_range_encoder(c, buf, buf_size);
|
|
// ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64);
|
|
ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
|
|
|
|
*p = *pict;
|
|
p->pict_type= FF_I_TYPE;
|
|
|
|
if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){
|
|
put_rac(c, &keystate, 1);
|
|
p->key_frame= 1;
|
|
write_header(f);
|
|
clear_state(f);
|
|
}else{
|
|
put_rac(c, &keystate, 0);
|
|
p->key_frame= 0;
|
|
}
|
|
|
|
if(!f->ac){
|
|
used_count += ff_rac_terminate(c);
|
|
//printf("pos=%d\n", used_count);
|
|
init_put_bits(&f->pb, buf + used_count, buf_size - used_count);
|
|
}
|
|
|
|
if(f->colorspace==0){
|
|
const int chroma_width = -((-width )>>f->chroma_h_shift);
|
|
const int chroma_height= -((-height)>>f->chroma_v_shift);
|
|
|
|
encode_plane(f, p->data[0], width, height, p->linesize[0], 0);
|
|
|
|
encode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
|
|
encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
|
|
}else{
|
|
encode_rgb_frame(f, (uint32_t*)(p->data[0]), width, height, p->linesize[0]/4);
|
|
}
|
|
emms_c();
|
|
|
|
f->picture_number++;
|
|
|
|
if(f->ac){
|
|
return ff_rac_terminate(c);
|
|
}else{
|
|
flush_put_bits(&f->pb); //nicer padding FIXME
|
|
return used_count + (put_bits_count(&f->pb)+7)/8;
|
|
}
|
|
}
|
|
|
|
static void common_end(FFV1Context *s){
|
|
int i;
|
|
|
|
for(i=0; i<s->plane_count; i++){
|
|
PlaneContext *p= &s->plane[i];
|
|
|
|
av_freep(&p->state);
|
|
}
|
|
}
|
|
|
|
static int encode_end(AVCodecContext *avctx)
|
|
{
|
|
FFV1Context *s = avctx->priv_data;
|
|
|
|
common_end(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
|
|
PlaneContext * const p= &s->plane[plane_index];
|
|
RangeCoder * const c= &s->c;
|
|
int x;
|
|
int run_count=0;
|
|
int run_mode=0;
|
|
int run_index= s->run_index;
|
|
|
|
for(x=0; x<w; x++){
|
|
int diff, context, sign;
|
|
|
|
context= get_context(s, sample[1] + x, sample[0] + x, sample[1] + x);
|
|
if(context < 0){
|
|
context= -context;
|
|
sign=1;
|
|
}else
|
|
sign=0;
|
|
|
|
|
|
if(s->ac){
|
|
diff= get_symbol(c, p->state[context], 1);
|
|
}else{
|
|
if(context == 0 && run_mode==0) run_mode=1;
|
|
|
|
if(run_mode){
|
|
if(run_count==0 && run_mode==1){
|
|
if(get_bits1(&s->gb)){
|
|
run_count = 1<<log2_run[run_index];
|
|
if(x + run_count <= w) run_index++;
|
|
}else{
|
|
if(log2_run[run_index]) run_count = get_bits(&s->gb, log2_run[run_index]);
|
|
else run_count=0;
|
|
if(run_index) run_index--;
|
|
run_mode=2;
|
|
}
|
|
}
|
|
run_count--;
|
|
if(run_count < 0){
|
|
run_mode=0;
|
|
run_count=0;
|
|
diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
|
|
if(diff>=0) diff++;
|
|
}else
|
|
diff=0;
|
|
}else
|
|
diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
|
|
|
|
// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, get_bits_count(&s->gb));
|
|
}
|
|
|
|
if(sign) diff= -diff;
|
|
|
|
sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1);
|
|
}
|
|
s->run_index= run_index;
|
|
}
|
|
|
|
static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){
|
|
int x, y;
|
|
int_fast16_t sample_buffer[2][w+6];
|
|
int_fast16_t *sample[2]= {sample_buffer[0]+3, sample_buffer[1]+3};
|
|
|
|
s->run_index=0;
|
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer));
|
|
|
|
for(y=0; y<h; y++){
|
|
int_fast16_t *temp= sample[0]; //FIXME try a normal buffer
|
|
|
|
sample[0]= sample[1];
|
|
sample[1]= temp;
|
|
|
|
sample[1][-1]= sample[0][0 ];
|
|
sample[0][ w]= sample[0][w-1];
|
|
|
|
//{START_TIMER
|
|
decode_line(s, w, sample, plane_index, 8);
|
|
for(x=0; x<w; x++){
|
|
src[x + stride*y]= sample[1][x];
|
|
}
|
|
//STOP_TIMER("decode-line")}
|
|
}
|
|
}
|
|
|
|
static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){
|
|
int x, y, p;
|
|
int_fast16_t sample_buffer[3][2][w+6];
|
|
int_fast16_t *sample[3][2]= {
|
|
{sample_buffer[0][0]+3, sample_buffer[0][1]+3},
|
|
{sample_buffer[1][0]+3, sample_buffer[1][1]+3},
|
|
{sample_buffer[2][0]+3, sample_buffer[2][1]+3}};
|
|
|
|
s->run_index=0;
|
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer));
|
|
|
|
for(y=0; y<h; y++){
|
|
for(p=0; p<3; p++){
|
|
int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer
|
|
|
|
sample[p][0]= sample[p][1];
|
|
sample[p][1]= temp;
|
|
|
|
sample[p][1][-1]= sample[p][0][0 ];
|
|
sample[p][0][ w]= sample[p][0][w-1];
|
|
decode_line(s, w, sample[p], FFMIN(p, 1), 9);
|
|
}
|
|
for(x=0; x<w; x++){
|
|
int g= sample[0][1][x];
|
|
int b= sample[1][1][x];
|
|
int r= sample[2][1][x];
|
|
|
|
// assert(g>=0 && b>=0 && r>=0);
|
|
// assert(g<256 && b<512 && r<512);
|
|
|
|
b -= 0x100;
|
|
r -= 0x100;
|
|
g -= (b + r)>>2;
|
|
b += g;
|
|
r += g;
|
|
|
|
src[x + stride*y]= b + (g<<8) + (r<<16);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){
|
|
int v;
|
|
int i=0;
|
|
uint8_t state[CONTEXT_SIZE];
|
|
|
|
memset(state, 128, sizeof(state));
|
|
|
|
for(v=0; i<128 ; v++){
|
|
int len= get_symbol(c, state, 0) + 1;
|
|
|
|
if(len + i > 128) return -1;
|
|
|
|
while(len--){
|
|
quant_table[i] = scale*v;
|
|
i++;
|
|
//printf("%2d ",v);
|
|
//if(i%16==0) printf("\n");
|
|
}
|
|
}
|
|
|
|
for(i=1; i<128; i++){
|
|
quant_table[256-i]= -quant_table[i];
|
|
}
|
|
quant_table[128]= -quant_table[127];
|
|
|
|
return 2*v - 1;
|
|
}
|
|
|
|
static int read_header(FFV1Context *f){
|
|
uint8_t state[CONTEXT_SIZE];
|
|
int i, context_count;
|
|
RangeCoder * const c= &f->c;
|
|
|
|
memset(state, 128, sizeof(state));
|
|
|
|
f->version= get_symbol(c, state, 0);
|
|
f->ac= f->avctx->coder_type= get_symbol(c, state, 0);
|
|
f->colorspace= get_symbol(c, state, 0); //YUV cs type
|
|
get_rac(c, state); //no chroma = false
|
|
f->chroma_h_shift= get_symbol(c, state, 0);
|
|
f->chroma_v_shift= get_symbol(c, state, 0);
|
|
get_rac(c, state); //transparency plane
|
|
f->plane_count= 2;
|
|
|
|
if(f->colorspace==0){
|
|
switch(16*f->chroma_h_shift + f->chroma_v_shift){
|
|
case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;
|
|
case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;
|
|
case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;
|
|
case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;
|
|
case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;
|
|
default:
|
|
av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
|
|
return -1;
|
|
}
|
|
}else if(f->colorspace==1){
|
|
if(f->chroma_h_shift || f->chroma_v_shift){
|
|
av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n");
|
|
return -1;
|
|
}
|
|
f->avctx->pix_fmt= PIX_FMT_RGBA32;
|
|
}else{
|
|
av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
|
|
return -1;
|
|
}
|
|
|
|
//printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);
|
|
|
|
context_count=1;
|
|
for(i=0; i<5; i++){
|
|
context_count*= read_quant_table(c, f->quant_table[i], context_count);
|
|
if(context_count < 0 || context_count > 32768){
|
|
av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
|
|
return -1;
|
|
}
|
|
}
|
|
context_count= (context_count+1)/2;
|
|
|
|
for(i=0; i<f->plane_count; i++){
|
|
PlaneContext * const p= &f->plane[i];
|
|
|
|
p->context_count= context_count;
|
|
|
|
if(f->ac){
|
|
if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t));
|
|
}else{
|
|
if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_init(AVCodecContext *avctx)
|
|
{
|
|
// FFV1Context *s = avctx->priv_data;
|
|
|
|
common_init(avctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size){
|
|
FFV1Context *f = avctx->priv_data;
|
|
RangeCoder * const c= &f->c;
|
|
const int width= f->width;
|
|
const int height= f->height;
|
|
AVFrame * const p= &f->picture;
|
|
int bytes_read;
|
|
uint8_t keystate= 128;
|
|
|
|
AVFrame *picture = data;
|
|
|
|
ff_init_range_decoder(c, buf, buf_size);
|
|
ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
|
|
|
|
|
|
p->pict_type= FF_I_TYPE; //FIXME I vs. P
|
|
if(get_rac(c, &keystate)){
|
|
p->key_frame= 1;
|
|
if(read_header(f) < 0)
|
|
return -1;
|
|
clear_state(f);
|
|
}else{
|
|
p->key_frame= 0;
|
|
}
|
|
if(!f->plane[0].state && !f->plane[0].vlc_state)
|
|
return -1;
|
|
|
|
p->reference= 0;
|
|
if(avctx->get_buffer(avctx, p) < 0){
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if(avctx->debug&FF_DEBUG_PICT_INFO)
|
|
av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);
|
|
|
|
if(!f->ac){
|
|
bytes_read = c->bytestream - c->bytestream_start - 1;
|
|
if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME
|
|
//printf("pos=%d\n", bytes_read);
|
|
init_get_bits(&f->gb, buf + bytes_read, buf_size - bytes_read);
|
|
} else {
|
|
bytes_read = 0; /* avoid warning */
|
|
}
|
|
|
|
if(f->colorspace==0){
|
|
const int chroma_width = -((-width )>>f->chroma_h_shift);
|
|
const int chroma_height= -((-height)>>f->chroma_v_shift);
|
|
decode_plane(f, p->data[0], width, height, p->linesize[0], 0);
|
|
|
|
decode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
|
|
decode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
|
|
}else{
|
|
decode_rgb_frame(f, (uint32_t*)p->data[0], width, height, p->linesize[0]/4);
|
|
}
|
|
|
|
emms_c();
|
|
|
|
f->picture_number++;
|
|
|
|
*picture= *p;
|
|
|
|
avctx->release_buffer(avctx, p); //FIXME
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
if(f->ac){
|
|
bytes_read= c->bytestream - c->bytestream_start - 1;
|
|
if(bytes_read ==0) av_log(f->avctx, AV_LOG_ERROR, "error at end of frame\n");
|
|
}else{
|
|
bytes_read+= (get_bits_count(&f->gb)+7)/8;
|
|
}
|
|
|
|
return bytes_read;
|
|
}
|
|
|
|
AVCodec ffv1_decoder = {
|
|
"ffv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_FFV1,
|
|
sizeof(FFV1Context),
|
|
decode_init,
|
|
NULL,
|
|
NULL,
|
|
decode_frame,
|
|
CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
|
|
NULL
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVCodec ffv1_encoder = {
|
|
"ffv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_FFV1,
|
|
sizeof(FFV1Context),
|
|
encode_init,
|
|
encode_frame,
|
|
encode_end,
|
|
};
|
|
#endif
|