1139 lines
34 KiB
C
Executable File
1139 lines
34 KiB
C
Executable File
/*
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* RoQ Video Encoder.
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*
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* Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com>
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* Copyright (C) 2004-2007 Eric Lasota
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* Based on RoQ specs (C) 2001 Tim Ferguson
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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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* id RoQ encoder by Vitor. Based on the Switchblade3 library and the
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* Switchblade3 FFmpeg glue by Eric Lasota.
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*/
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/*
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* COSTS:
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* Level 1:
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* SKIP - 2 bits
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* MOTION - 2 + 8 bits
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* CODEBOOK - 2 + 8 bits
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* SUBDIVIDE - 2 + combined subcel cost
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*
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* Level 2:
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* SKIP - 2 bits
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* MOTION - 2 + 8 bits
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* CODEBOOK - 2 + 8 bits
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* SUBDIVIDE - 2 + 4*8 bits
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*
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* Maximum cost: 138 bits per cel
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*
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* Proper evaluation requires LCD fraction comparison, which requires
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* Squared Error (SE) loss * savings increase
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*
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* Maximum savings increase: 136 bits
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* Maximum SE loss without overflow: 31580641
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* Components in 8x8 supercel: 192
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* Maximum SE precision per component: 164482
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* >65025, so no truncation is needed (phew)
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*/
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#include <string.h>
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#include "libavutil/attributes.h"
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#include "libavutil/opt.h"
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#include "roqvideo.h"
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#include "bytestream.h"
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#include "elbg.h"
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#include "internal.h"
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#include "mathops.h"
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#define CHROMA_BIAS 1
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/**
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* Maximum number of generated 4x4 codebooks. Can't be 256 to workaround a
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* Quake 3 bug.
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*/
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#define MAX_CBS_4x4 256
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#define MAX_CBS_2x2 256 ///< Maximum number of 2x2 codebooks.
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/* The cast is useful when multiplying it by INT_MAX */
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#define ROQ_LAMBDA_SCALE ((uint64_t) FF_LAMBDA_SCALE)
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/* Macroblock support functions */
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static void unpack_roq_cell(roq_cell *cell, uint8_t u[4*3])
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{
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memcpy(u , cell->y, 4);
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memset(u+4, cell->u, 4);
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memset(u+8, cell->v, 4);
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}
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static void unpack_roq_qcell(uint8_t cb2[], roq_qcell *qcell, uint8_t u[4*4*3])
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{
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int i,cp;
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static const int offsets[4] = {0, 2, 8, 10};
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for (cp=0; cp<3; cp++)
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for (i=0; i<4; i++) {
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u[4*4*cp + offsets[i] ] = cb2[qcell->idx[i]*2*2*3 + 4*cp ];
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u[4*4*cp + offsets[i]+1] = cb2[qcell->idx[i]*2*2*3 + 4*cp+1];
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u[4*4*cp + offsets[i]+4] = cb2[qcell->idx[i]*2*2*3 + 4*cp+2];
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u[4*4*cp + offsets[i]+5] = cb2[qcell->idx[i]*2*2*3 + 4*cp+3];
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}
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}
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static void enlarge_roq_mb4(uint8_t base[3*16], uint8_t u[3*64])
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{
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int x,y,cp;
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for(cp=0; cp<3; cp++)
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for(y=0; y<8; y++)
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for(x=0; x<8; x++)
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*u++ = base[(y/2)*4 + (x/2) + 16*cp];
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}
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static inline int square(int x)
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{
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return x*x;
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}
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static inline int eval_sse(const uint8_t *a, const uint8_t *b, int count)
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{
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int diff=0;
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while(count--)
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diff += square(*b++ - *a++);
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return diff;
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}
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// FIXME Could use DSPContext.sse, but it is not so speed critical (used
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// just for motion estimation).
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static int block_sse(uint8_t * const *buf1, uint8_t * const *buf2, int x1, int y1,
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int x2, int y2, const int *stride1, const int *stride2, int size)
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{
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int i, k;
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int sse=0;
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for (k=0; k<3; k++) {
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int bias = (k ? CHROMA_BIAS : 4);
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for (i=0; i<size; i++)
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sse += bias*eval_sse(buf1[k] + (y1+i)*stride1[k] + x1,
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buf2[k] + (y2+i)*stride2[k] + x2, size);
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}
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return sse;
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}
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static int eval_motion_dist(RoqContext *enc, int x, int y, motion_vect vect,
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int size)
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{
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int mx=vect.d[0];
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int my=vect.d[1];
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if (mx < -7 || mx > 7)
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return INT_MAX;
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if (my < -7 || my > 7)
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return INT_MAX;
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mx += x;
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my += y;
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if ((unsigned) mx > enc->width-size || (unsigned) my > enc->height-size)
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return INT_MAX;
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return block_sse(enc->frame_to_enc->data, enc->last_frame->data, x, y,
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mx, my,
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enc->frame_to_enc->linesize, enc->last_frame->linesize,
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size);
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}
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/**
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* @return distortion between two macroblocks
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*/
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static inline int squared_diff_macroblock(uint8_t a[], uint8_t b[], int size)
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{
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int cp, sdiff=0;
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for(cp=0;cp<3;cp++) {
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int bias = (cp ? CHROMA_BIAS : 4);
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sdiff += bias*eval_sse(a, b, size*size);
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a += size*size;
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b += size*size;
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}
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return sdiff;
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}
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typedef struct SubcelEvaluation {
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int eval_dist[4];
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int best_bit_use;
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int best_coding;
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int subCels[4];
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motion_vect motion;
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int cbEntry;
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} SubcelEvaluation;
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typedef struct CelEvaluation {
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int eval_dist[4];
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int best_coding;
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SubcelEvaluation subCels[4];
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motion_vect motion;
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int cbEntry;
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int sourceX, sourceY;
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} CelEvaluation;
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typedef struct RoqCodebooks {
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int numCB4;
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int numCB2;
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int usedCB2[MAX_CBS_2x2];
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int usedCB4[MAX_CBS_4x4];
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uint8_t unpacked_cb2[MAX_CBS_2x2*2*2*3];
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uint8_t unpacked_cb4[MAX_CBS_4x4*4*4*3];
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uint8_t unpacked_cb4_enlarged[MAX_CBS_4x4*8*8*3];
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} RoqCodebooks;
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/**
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* Temporary vars
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*/
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typedef struct RoqTempData
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{
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CelEvaluation *cel_evals;
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int f2i4[MAX_CBS_4x4];
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int i2f4[MAX_CBS_4x4];
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int f2i2[MAX_CBS_2x2];
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int i2f2[MAX_CBS_2x2];
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int mainChunkSize;
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int numCB4;
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int numCB2;
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RoqCodebooks codebooks;
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int *closest_cb2;
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int used_option[4];
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} RoqTempdata;
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/**
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* Initialize cel evaluators and set their source coordinates
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*/
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static int create_cel_evals(RoqContext *enc, RoqTempdata *tempData)
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{
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int n=0, x, y, i;
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tempData->cel_evals = av_malloc_array(enc->width*enc->height/64, sizeof(CelEvaluation));
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if (!tempData->cel_evals)
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return AVERROR(ENOMEM);
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/* Map to the ROQ quadtree order */
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for (y=0; y<enc->height; y+=16)
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for (x=0; x<enc->width; x+=16)
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for(i=0; i<4; i++) {
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tempData->cel_evals[n ].sourceX = x + (i&1)*8;
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tempData->cel_evals[n++].sourceY = y + (i&2)*4;
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}
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return 0;
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}
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/**
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* Get macroblocks from parts of the image
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*/
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static void get_frame_mb(const AVFrame *frame, int x, int y, uint8_t mb[], int dim)
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{
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int i, j, cp;
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for (cp=0; cp<3; cp++) {
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int stride = frame->linesize[cp];
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for (i=0; i<dim; i++)
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for (j=0; j<dim; j++)
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*mb++ = frame->data[cp][(y+i)*stride + x + j];
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}
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}
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/**
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* Find the codebook with the lowest distortion from an image
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*/
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static int index_mb(uint8_t cluster[], uint8_t cb[], int numCB,
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int *outIndex, int dim)
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{
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int i, lDiff = INT_MAX, pick=0;
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/* Diff against the others */
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for (i=0; i<numCB; i++) {
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int diff = squared_diff_macroblock(cluster, cb + i*dim*dim*3, dim);
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if (diff < lDiff) {
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lDiff = diff;
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pick = i;
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}
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}
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*outIndex = pick;
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return lDiff;
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}
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#define EVAL_MOTION(MOTION) \
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do { \
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diff = eval_motion_dist(enc, j, i, MOTION, blocksize); \
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\
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if (diff < lowestdiff) { \
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lowestdiff = diff; \
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bestpick = MOTION; \
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} \
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} while(0)
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static void motion_search(RoqContext *enc, int blocksize)
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{
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static const motion_vect offsets[8] = {
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{{ 0,-1}},
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{{ 0, 1}},
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{{-1, 0}},
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{{ 1, 0}},
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{{-1, 1}},
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{{ 1,-1}},
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{{-1,-1}},
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{{ 1, 1}},
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};
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int diff, lowestdiff, oldbest;
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int off[3];
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motion_vect bestpick = {{0,0}};
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int i, j, k, offset;
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motion_vect *last_motion;
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motion_vect *this_motion;
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motion_vect vect, vect2;
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int max=(enc->width/blocksize)*enc->height/blocksize;
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if (blocksize == 4) {
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last_motion = enc->last_motion4;
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this_motion = enc->this_motion4;
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} else {
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last_motion = enc->last_motion8;
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this_motion = enc->this_motion8;
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}
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for (i=0; i<enc->height; i+=blocksize)
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for (j=0; j<enc->width; j+=blocksize) {
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lowestdiff = eval_motion_dist(enc, j, i, (motion_vect) {{0,0}},
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blocksize);
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bestpick.d[0] = 0;
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bestpick.d[1] = 0;
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if (blocksize == 4)
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EVAL_MOTION(enc->this_motion8[(i/8)*(enc->width/8) + j/8]);
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offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
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if (offset < max && offset >= 0)
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EVAL_MOTION(last_motion[offset]);
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offset++;
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if (offset < max && offset >= 0)
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EVAL_MOTION(last_motion[offset]);
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offset = (i/blocksize + 1)*enc->width/blocksize + j/blocksize;
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if (offset < max && offset >= 0)
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EVAL_MOTION(last_motion[offset]);
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off[0]= (i/blocksize)*enc->width/blocksize + j/blocksize - 1;
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off[1]= off[0] - enc->width/blocksize + 1;
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off[2]= off[1] + 1;
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if (i) {
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for(k=0; k<2; k++)
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vect.d[k]= mid_pred(this_motion[off[0]].d[k],
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this_motion[off[1]].d[k],
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this_motion[off[2]].d[k]);
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EVAL_MOTION(vect);
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for(k=0; k<3; k++)
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EVAL_MOTION(this_motion[off[k]]);
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} else if(j)
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EVAL_MOTION(this_motion[off[0]]);
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vect = bestpick;
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oldbest = -1;
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while (oldbest != lowestdiff) {
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oldbest = lowestdiff;
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for (k=0; k<8; k++) {
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vect2 = vect;
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vect2.d[0] += offsets[k].d[0];
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vect2.d[1] += offsets[k].d[1];
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EVAL_MOTION(vect2);
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}
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vect = bestpick;
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}
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offset = (i/blocksize)*enc->width/blocksize + j/blocksize;
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this_motion[offset] = bestpick;
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}
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}
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/**
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* Get distortion for all options available to a subcel
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*/
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static void gather_data_for_subcel(SubcelEvaluation *subcel, int x,
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int y, RoqContext *enc, RoqTempdata *tempData)
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{
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uint8_t mb4[4*4*3];
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uint8_t mb2[2*2*3];
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int cluster_index;
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int i, best_dist;
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static const int bitsUsed[4] = {2, 10, 10, 34};
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if (enc->framesSinceKeyframe >= 1) {
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subcel->motion = enc->this_motion4[y*enc->width/16 + x/4];
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subcel->eval_dist[RoQ_ID_FCC] =
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eval_motion_dist(enc, x, y,
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enc->this_motion4[y*enc->width/16 + x/4], 4);
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} else
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subcel->eval_dist[RoQ_ID_FCC] = INT_MAX;
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if (enc->framesSinceKeyframe >= 2)
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subcel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
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enc->current_frame->data, x,
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y, x, y,
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enc->frame_to_enc->linesize,
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enc->current_frame->linesize,
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4);
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else
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subcel->eval_dist[RoQ_ID_MOT] = INT_MAX;
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cluster_index = y*enc->width/16 + x/4;
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get_frame_mb(enc->frame_to_enc, x, y, mb4, 4);
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subcel->eval_dist[RoQ_ID_SLD] = index_mb(mb4,
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tempData->codebooks.unpacked_cb4,
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tempData->codebooks.numCB4,
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&subcel->cbEntry, 4);
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subcel->eval_dist[RoQ_ID_CCC] = 0;
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for(i=0;i<4;i++) {
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subcel->subCels[i] = tempData->closest_cb2[cluster_index*4+i];
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get_frame_mb(enc->frame_to_enc, x+2*(i&1),
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y+(i&2), mb2, 2);
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subcel->eval_dist[RoQ_ID_CCC] +=
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squared_diff_macroblock(tempData->codebooks.unpacked_cb2 + subcel->subCels[i]*2*2*3, mb2, 2);
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}
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best_dist = INT_MAX;
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for (i=0; i<4; i++)
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if (ROQ_LAMBDA_SCALE*subcel->eval_dist[i] + enc->lambda*bitsUsed[i] <
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best_dist) {
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subcel->best_coding = i;
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subcel->best_bit_use = bitsUsed[i];
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best_dist = ROQ_LAMBDA_SCALE*subcel->eval_dist[i] +
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enc->lambda*bitsUsed[i];
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}
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}
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/**
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* Get distortion for all options available to a cel
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*/
|
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static void gather_data_for_cel(CelEvaluation *cel, RoqContext *enc,
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RoqTempdata *tempData)
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{
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uint8_t mb8[8*8*3];
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int index = cel->sourceY*enc->width/64 + cel->sourceX/8;
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int i, j, best_dist, divide_bit_use;
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int bitsUsed[4] = {2, 10, 10, 0};
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if (enc->framesSinceKeyframe >= 1) {
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cel->motion = enc->this_motion8[index];
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cel->eval_dist[RoQ_ID_FCC] =
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eval_motion_dist(enc, cel->sourceX, cel->sourceY,
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enc->this_motion8[index], 8);
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} else
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cel->eval_dist[RoQ_ID_FCC] = INT_MAX;
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if (enc->framesSinceKeyframe >= 2)
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cel->eval_dist[RoQ_ID_MOT] = block_sse(enc->frame_to_enc->data,
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enc->current_frame->data,
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cel->sourceX, cel->sourceY,
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cel->sourceX, cel->sourceY,
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enc->frame_to_enc->linesize,
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enc->current_frame->linesize,8);
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else
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cel->eval_dist[RoQ_ID_MOT] = INT_MAX;
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get_frame_mb(enc->frame_to_enc, cel->sourceX, cel->sourceY, mb8, 8);
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cel->eval_dist[RoQ_ID_SLD] =
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index_mb(mb8, tempData->codebooks.unpacked_cb4_enlarged,
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tempData->codebooks.numCB4, &cel->cbEntry, 8);
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gather_data_for_subcel(cel->subCels + 0, cel->sourceX+0, cel->sourceY+0, enc, tempData);
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gather_data_for_subcel(cel->subCels + 1, cel->sourceX+4, cel->sourceY+0, enc, tempData);
|
|
gather_data_for_subcel(cel->subCels + 2, cel->sourceX+0, cel->sourceY+4, enc, tempData);
|
|
gather_data_for_subcel(cel->subCels + 3, cel->sourceX+4, cel->sourceY+4, enc, tempData);
|
|
|
|
cel->eval_dist[RoQ_ID_CCC] = 0;
|
|
divide_bit_use = 0;
|
|
for (i=0; i<4; i++) {
|
|
cel->eval_dist[RoQ_ID_CCC] +=
|
|
cel->subCels[i].eval_dist[cel->subCels[i].best_coding];
|
|
divide_bit_use += cel->subCels[i].best_bit_use;
|
|
}
|
|
|
|
best_dist = INT_MAX;
|
|
bitsUsed[3] = 2 + divide_bit_use;
|
|
|
|
for (i=0; i<4; i++)
|
|
if (ROQ_LAMBDA_SCALE*cel->eval_dist[i] + enc->lambda*bitsUsed[i] <
|
|
best_dist) {
|
|
cel->best_coding = i;
|
|
best_dist = ROQ_LAMBDA_SCALE*cel->eval_dist[i] +
|
|
enc->lambda*bitsUsed[i];
|
|
}
|
|
|
|
tempData->used_option[cel->best_coding]++;
|
|
tempData->mainChunkSize += bitsUsed[cel->best_coding];
|
|
|
|
if (cel->best_coding == RoQ_ID_SLD)
|
|
tempData->codebooks.usedCB4[cel->cbEntry]++;
|
|
|
|
if (cel->best_coding == RoQ_ID_CCC)
|
|
for (i=0; i<4; i++) {
|
|
if (cel->subCels[i].best_coding == RoQ_ID_SLD)
|
|
tempData->codebooks.usedCB4[cel->subCels[i].cbEntry]++;
|
|
else if (cel->subCels[i].best_coding == RoQ_ID_CCC)
|
|
for (j=0; j<4; j++)
|
|
tempData->codebooks.usedCB2[cel->subCels[i].subCels[j]]++;
|
|
}
|
|
}
|
|
|
|
static void remap_codebooks(RoqContext *enc, RoqTempdata *tempData)
|
|
{
|
|
int i, j, idx=0;
|
|
|
|
/* Make remaps for the final codebook usage */
|
|
for (i=0; i<(enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4); i++) {
|
|
if (tempData->codebooks.usedCB4[i]) {
|
|
tempData->i2f4[i] = idx;
|
|
tempData->f2i4[idx] = i;
|
|
for (j=0; j<4; j++)
|
|
tempData->codebooks.usedCB2[enc->cb4x4[i].idx[j]]++;
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
tempData->numCB4 = idx;
|
|
|
|
idx = 0;
|
|
for (i=0; i<MAX_CBS_2x2; i++) {
|
|
if (tempData->codebooks.usedCB2[i]) {
|
|
tempData->i2f2[i] = idx;
|
|
tempData->f2i2[idx] = i;
|
|
idx++;
|
|
}
|
|
}
|
|
tempData->numCB2 = idx;
|
|
|
|
}
|
|
|
|
/**
|
|
* Write codebook chunk
|
|
*/
|
|
static void write_codebooks(RoqContext *enc, RoqTempdata *tempData)
|
|
{
|
|
int i, j;
|
|
uint8_t **outp= &enc->out_buf;
|
|
|
|
if (tempData->numCB2) {
|
|
bytestream_put_le16(outp, RoQ_QUAD_CODEBOOK);
|
|
bytestream_put_le32(outp, tempData->numCB2*6 + tempData->numCB4*4);
|
|
bytestream_put_byte(outp, tempData->numCB4);
|
|
bytestream_put_byte(outp, tempData->numCB2);
|
|
|
|
for (i=0; i<tempData->numCB2; i++) {
|
|
bytestream_put_buffer(outp, enc->cb2x2[tempData->f2i2[i]].y, 4);
|
|
bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].u);
|
|
bytestream_put_byte(outp, enc->cb2x2[tempData->f2i2[i]].v);
|
|
}
|
|
|
|
for (i=0; i<tempData->numCB4; i++)
|
|
for (j=0; j<4; j++)
|
|
bytestream_put_byte(outp, tempData->i2f2[enc->cb4x4[tempData->f2i4[i]].idx[j]]);
|
|
|
|
}
|
|
}
|
|
|
|
static inline uint8_t motion_arg(motion_vect mot)
|
|
{
|
|
uint8_t ax = 8 - ((uint8_t) mot.d[0]);
|
|
uint8_t ay = 8 - ((uint8_t) mot.d[1]);
|
|
return ((ax&15)<<4) | (ay&15);
|
|
}
|
|
|
|
typedef struct CodingSpool {
|
|
int typeSpool;
|
|
int typeSpoolLength;
|
|
uint8_t argumentSpool[64];
|
|
uint8_t *args;
|
|
uint8_t **pout;
|
|
} CodingSpool;
|
|
|
|
/* NOTE: Typecodes must be spooled AFTER arguments!! */
|
|
static void write_typecode(CodingSpool *s, uint8_t type)
|
|
{
|
|
s->typeSpool |= (type & 3) << (14 - s->typeSpoolLength);
|
|
s->typeSpoolLength += 2;
|
|
if (s->typeSpoolLength == 16) {
|
|
bytestream_put_le16(s->pout, s->typeSpool);
|
|
bytestream_put_buffer(s->pout, s->argumentSpool,
|
|
s->args - s->argumentSpool);
|
|
s->typeSpoolLength = 0;
|
|
s->typeSpool = 0;
|
|
s->args = s->argumentSpool;
|
|
}
|
|
}
|
|
|
|
static void reconstruct_and_encode_image(RoqContext *enc, RoqTempdata *tempData, int w, int h, int numBlocks)
|
|
{
|
|
int i, j, k;
|
|
int x, y;
|
|
int subX, subY;
|
|
int dist=0;
|
|
|
|
roq_qcell *qcell;
|
|
CelEvaluation *eval;
|
|
|
|
CodingSpool spool;
|
|
|
|
spool.typeSpool=0;
|
|
spool.typeSpoolLength=0;
|
|
spool.args = spool.argumentSpool;
|
|
spool.pout = &enc->out_buf;
|
|
|
|
if (tempData->used_option[RoQ_ID_CCC]%2)
|
|
tempData->mainChunkSize+=8; //FIXME
|
|
|
|
/* Write the video chunk header */
|
|
bytestream_put_le16(&enc->out_buf, RoQ_QUAD_VQ);
|
|
bytestream_put_le32(&enc->out_buf, tempData->mainChunkSize/8);
|
|
bytestream_put_byte(&enc->out_buf, 0x0);
|
|
bytestream_put_byte(&enc->out_buf, 0x0);
|
|
|
|
for (i=0; i<numBlocks; i++) {
|
|
eval = tempData->cel_evals + i;
|
|
|
|
x = eval->sourceX;
|
|
y = eval->sourceY;
|
|
dist += eval->eval_dist[eval->best_coding];
|
|
|
|
switch (eval->best_coding) {
|
|
case RoQ_ID_MOT:
|
|
write_typecode(&spool, RoQ_ID_MOT);
|
|
break;
|
|
|
|
case RoQ_ID_FCC:
|
|
bytestream_put_byte(&spool.args, motion_arg(eval->motion));
|
|
|
|
write_typecode(&spool, RoQ_ID_FCC);
|
|
ff_apply_motion_8x8(enc, x, y,
|
|
eval->motion.d[0], eval->motion.d[1]);
|
|
break;
|
|
|
|
case RoQ_ID_SLD:
|
|
bytestream_put_byte(&spool.args, tempData->i2f4[eval->cbEntry]);
|
|
write_typecode(&spool, RoQ_ID_SLD);
|
|
|
|
qcell = enc->cb4x4 + eval->cbEntry;
|
|
ff_apply_vector_4x4(enc, x , y , enc->cb2x2 + qcell->idx[0]);
|
|
ff_apply_vector_4x4(enc, x+4, y , enc->cb2x2 + qcell->idx[1]);
|
|
ff_apply_vector_4x4(enc, x , y+4, enc->cb2x2 + qcell->idx[2]);
|
|
ff_apply_vector_4x4(enc, x+4, y+4, enc->cb2x2 + qcell->idx[3]);
|
|
break;
|
|
|
|
case RoQ_ID_CCC:
|
|
write_typecode(&spool, RoQ_ID_CCC);
|
|
|
|
for (j=0; j<4; j++) {
|
|
subX = x + 4*(j&1);
|
|
subY = y + 2*(j&2);
|
|
|
|
switch(eval->subCels[j].best_coding) {
|
|
case RoQ_ID_MOT:
|
|
break;
|
|
|
|
case RoQ_ID_FCC:
|
|
bytestream_put_byte(&spool.args,
|
|
motion_arg(eval->subCels[j].motion));
|
|
|
|
ff_apply_motion_4x4(enc, subX, subY,
|
|
eval->subCels[j].motion.d[0],
|
|
eval->subCels[j].motion.d[1]);
|
|
break;
|
|
|
|
case RoQ_ID_SLD:
|
|
bytestream_put_byte(&spool.args,
|
|
tempData->i2f4[eval->subCels[j].cbEntry]);
|
|
|
|
qcell = enc->cb4x4 + eval->subCels[j].cbEntry;
|
|
|
|
ff_apply_vector_2x2(enc, subX , subY ,
|
|
enc->cb2x2 + qcell->idx[0]);
|
|
ff_apply_vector_2x2(enc, subX+2, subY ,
|
|
enc->cb2x2 + qcell->idx[1]);
|
|
ff_apply_vector_2x2(enc, subX , subY+2,
|
|
enc->cb2x2 + qcell->idx[2]);
|
|
ff_apply_vector_2x2(enc, subX+2, subY+2,
|
|
enc->cb2x2 + qcell->idx[3]);
|
|
break;
|
|
|
|
case RoQ_ID_CCC:
|
|
for (k=0; k<4; k++) {
|
|
int cb_idx = eval->subCels[j].subCels[k];
|
|
bytestream_put_byte(&spool.args,
|
|
tempData->i2f2[cb_idx]);
|
|
|
|
ff_apply_vector_2x2(enc, subX + 2*(k&1), subY + (k&2),
|
|
enc->cb2x2 + cb_idx);
|
|
}
|
|
break;
|
|
}
|
|
write_typecode(&spool, eval->subCels[j].best_coding);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Flush the remainder of the argument/type spool */
|
|
while (spool.typeSpoolLength)
|
|
write_typecode(&spool, 0x0);
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a single YUV cell from a 2x2 section of the image
|
|
*/
|
|
static inline void frame_block_to_cell(uint8_t *block, uint8_t * const *data,
|
|
int top, int left, const int *stride)
|
|
{
|
|
int i, j, u=0, v=0;
|
|
|
|
for (i=0; i<2; i++)
|
|
for (j=0; j<2; j++) {
|
|
int x = (top+i)*stride[0] + left + j;
|
|
*block++ = data[0][x];
|
|
x = (top+i)*stride[1] + left + j;
|
|
u += data[1][x];
|
|
v += data[2][x];
|
|
}
|
|
|
|
*block++ = (u+2)/4;
|
|
*block++ = (v+2)/4;
|
|
}
|
|
|
|
/**
|
|
* Create YUV clusters for the entire image
|
|
*/
|
|
static void create_clusters(const AVFrame *frame, int w, int h, uint8_t *yuvClusters)
|
|
{
|
|
int i, j, k, l;
|
|
|
|
for (i=0; i<h; i+=4)
|
|
for (j=0; j<w; j+=4) {
|
|
for (k=0; k < 2; k++)
|
|
for (l=0; l < 2; l++)
|
|
frame_block_to_cell(yuvClusters + (l + 2*k)*6, frame->data,
|
|
i+2*k, j+2*l, frame->linesize);
|
|
yuvClusters += 24;
|
|
}
|
|
}
|
|
|
|
static int generate_codebook(RoqContext *enc, RoqTempdata *tempdata,
|
|
int *points, int inputCount, roq_cell *results,
|
|
int size, int cbsize)
|
|
{
|
|
int i, j, k, ret = 0;
|
|
int c_size = size*size/4;
|
|
int *buf;
|
|
int *codebook = av_malloc_array(6*c_size, cbsize*sizeof(int));
|
|
int *closest_cb;
|
|
|
|
if (!codebook)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (size == 4) {
|
|
closest_cb = av_malloc_array(6*c_size, inputCount*sizeof(int));
|
|
if (!closest_cb) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto out;
|
|
}
|
|
} else
|
|
closest_cb = tempdata->closest_cb2;
|
|
|
|
ret = avpriv_init_elbg(points, 6 * c_size, inputCount, codebook,
|
|
cbsize, 1, closest_cb, &enc->randctx);
|
|
if (ret < 0)
|
|
goto out;
|
|
ret = avpriv_do_elbg(points, 6 * c_size, inputCount, codebook,
|
|
cbsize, 1, closest_cb, &enc->randctx);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
buf = codebook;
|
|
for (i=0; i<cbsize; i++)
|
|
for (k=0; k<c_size; k++) {
|
|
for(j=0; j<4; j++)
|
|
results->y[j] = *buf++;
|
|
|
|
results->u = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
|
|
results->v = (*buf++ + CHROMA_BIAS/2)/CHROMA_BIAS;
|
|
results++;
|
|
}
|
|
out:
|
|
if (size == 4)
|
|
av_free(closest_cb);
|
|
av_free(codebook);
|
|
return ret;
|
|
}
|
|
|
|
static int generate_new_codebooks(RoqContext *enc, RoqTempdata *tempData)
|
|
{
|
|
int i, j, ret = 0;
|
|
RoqCodebooks *codebooks = &tempData->codebooks;
|
|
int max = enc->width*enc->height/16;
|
|
uint8_t mb2[3*4];
|
|
roq_cell *results4 = av_malloc(sizeof(roq_cell)*MAX_CBS_4x4*4);
|
|
uint8_t *yuvClusters=av_malloc_array(max, sizeof(int)*6*4);
|
|
int *points = av_malloc_array(max, 6*4*sizeof(int));
|
|
int bias;
|
|
|
|
if (!results4 || !yuvClusters || !points) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
/* Subsample YUV data */
|
|
create_clusters(enc->frame_to_enc, enc->width, enc->height, yuvClusters);
|
|
|
|
/* Cast to integer and apply chroma bias */
|
|
for (i=0; i<max*24; i++) {
|
|
bias = ((i%6)<4) ? 1 : CHROMA_BIAS;
|
|
points[i] = bias*yuvClusters[i];
|
|
}
|
|
|
|
/* Create 4x4 codebooks */
|
|
if ((ret = generate_codebook(enc, tempData, points, max,
|
|
results4, 4, (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4))) < 0)
|
|
goto out;
|
|
|
|
codebooks->numCB4 = (enc->quake3_compat ? MAX_CBS_4x4-1 : MAX_CBS_4x4);
|
|
|
|
tempData->closest_cb2 = av_malloc_array(max, 4*sizeof(int));
|
|
if (!tempData->closest_cb2) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
/* Create 2x2 codebooks */
|
|
if ((ret = generate_codebook(enc, tempData, points, max * 4,
|
|
enc->cb2x2, 2, MAX_CBS_2x2)) < 0)
|
|
goto out;
|
|
|
|
codebooks->numCB2 = MAX_CBS_2x2;
|
|
|
|
/* Unpack 2x2 codebook clusters */
|
|
for (i=0; i<codebooks->numCB2; i++)
|
|
unpack_roq_cell(enc->cb2x2 + i, codebooks->unpacked_cb2 + i*2*2*3);
|
|
|
|
/* Index all 4x4 entries to the 2x2 entries, unpack, and enlarge */
|
|
for (i=0; i<codebooks->numCB4; i++) {
|
|
for (j=0; j<4; j++) {
|
|
unpack_roq_cell(&results4[4*i + j], mb2);
|
|
index_mb(mb2, codebooks->unpacked_cb2, codebooks->numCB2,
|
|
&enc->cb4x4[i].idx[j], 2);
|
|
}
|
|
unpack_roq_qcell(codebooks->unpacked_cb2, enc->cb4x4 + i,
|
|
codebooks->unpacked_cb4 + i*4*4*3);
|
|
enlarge_roq_mb4(codebooks->unpacked_cb4 + i*4*4*3,
|
|
codebooks->unpacked_cb4_enlarged + i*8*8*3);
|
|
}
|
|
out:
|
|
av_free(yuvClusters);
|
|
av_free(points);
|
|
av_free(results4);
|
|
return ret;
|
|
}
|
|
|
|
static int roq_encode_video(RoqContext *enc)
|
|
{
|
|
RoqTempdata *tempData = enc->tmpData;
|
|
int i, ret;
|
|
|
|
memset(tempData, 0, sizeof(*tempData));
|
|
|
|
ret = create_cel_evals(enc, tempData);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = generate_new_codebooks(enc, tempData);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (enc->framesSinceKeyframe >= 1) {
|
|
motion_search(enc, 8);
|
|
motion_search(enc, 4);
|
|
}
|
|
|
|
retry_encode:
|
|
for (i=0; i<enc->width*enc->height/64; i++)
|
|
gather_data_for_cel(tempData->cel_evals + i, enc, tempData);
|
|
|
|
/* Quake 3 can't handle chunks bigger than 65535 bytes */
|
|
if (tempData->mainChunkSize/8 > 65535 && enc->quake3_compat) {
|
|
if (enc->lambda > 100000) {
|
|
av_log(enc->avctx, AV_LOG_ERROR, "Cannot encode video in Quake compatible form\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
av_log(enc->avctx, AV_LOG_ERROR,
|
|
"Warning, generated a frame too big for Quake (%d > 65535), "
|
|
"now switching to a bigger qscale value.\n",
|
|
tempData->mainChunkSize/8);
|
|
enc->lambda *= 1.5;
|
|
tempData->mainChunkSize = 0;
|
|
memset(tempData->used_option, 0, sizeof(tempData->used_option));
|
|
memset(tempData->codebooks.usedCB4, 0,
|
|
sizeof(tempData->codebooks.usedCB4));
|
|
memset(tempData->codebooks.usedCB2, 0,
|
|
sizeof(tempData->codebooks.usedCB2));
|
|
|
|
goto retry_encode;
|
|
}
|
|
|
|
remap_codebooks(enc, tempData);
|
|
|
|
write_codebooks(enc, tempData);
|
|
|
|
reconstruct_and_encode_image(enc, tempData, enc->width, enc->height,
|
|
enc->width*enc->height/64);
|
|
|
|
/* Rotate frame history */
|
|
FFSWAP(AVFrame *, enc->current_frame, enc->last_frame);
|
|
FFSWAP(motion_vect *, enc->last_motion4, enc->this_motion4);
|
|
FFSWAP(motion_vect *, enc->last_motion8, enc->this_motion8);
|
|
|
|
av_freep(&tempData->cel_evals);
|
|
av_freep(&tempData->closest_cb2);
|
|
|
|
enc->framesSinceKeyframe++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int roq_encode_end(AVCodecContext *avctx)
|
|
{
|
|
RoqContext *enc = avctx->priv_data;
|
|
|
|
av_frame_free(&enc->current_frame);
|
|
av_frame_free(&enc->last_frame);
|
|
|
|
av_freep(&enc->tmpData);
|
|
av_freep(&enc->this_motion4);
|
|
av_freep(&enc->last_motion4);
|
|
av_freep(&enc->this_motion8);
|
|
av_freep(&enc->last_motion8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int roq_encode_init(AVCodecContext *avctx)
|
|
{
|
|
RoqContext *enc = avctx->priv_data;
|
|
|
|
av_lfg_init(&enc->randctx, 1);
|
|
|
|
enc->avctx = avctx;
|
|
|
|
enc->framesSinceKeyframe = 0;
|
|
if ((avctx->width & 0xf) || (avctx->height & 0xf)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Dimensions must be divisible by 16\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (avctx->width > 65535 || avctx->height > 65535) {
|
|
av_log(avctx, AV_LOG_ERROR, "Dimensions are max %d\n", enc->quake3_compat ? 32768 : 65535);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (((avctx->width)&(avctx->width-1))||((avctx->height)&(avctx->height-1)))
|
|
av_log(avctx, AV_LOG_ERROR, "Warning: dimensions not power of two, this is not supported by quake\n");
|
|
|
|
enc->width = avctx->width;
|
|
enc->height = avctx->height;
|
|
|
|
enc->framesSinceKeyframe = 0;
|
|
enc->first_frame = 1;
|
|
|
|
enc->last_frame = av_frame_alloc();
|
|
enc->current_frame = av_frame_alloc();
|
|
if (!enc->last_frame || !enc->current_frame) {
|
|
roq_encode_end(avctx);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
enc->tmpData = av_malloc(sizeof(RoqTempdata));
|
|
|
|
enc->this_motion4 =
|
|
av_mallocz_array((enc->width*enc->height/16), sizeof(motion_vect));
|
|
|
|
enc->last_motion4 =
|
|
av_malloc_array ((enc->width*enc->height/16), sizeof(motion_vect));
|
|
|
|
enc->this_motion8 =
|
|
av_mallocz_array((enc->width*enc->height/64), sizeof(motion_vect));
|
|
|
|
enc->last_motion8 =
|
|
av_malloc_array ((enc->width*enc->height/64), sizeof(motion_vect));
|
|
|
|
if (!enc->tmpData || !enc->this_motion4 || !enc->last_motion4 ||
|
|
!enc->this_motion8 || !enc->last_motion8) {
|
|
roq_encode_end(avctx);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void roq_write_video_info_chunk(RoqContext *enc)
|
|
{
|
|
/* ROQ info chunk */
|
|
bytestream_put_le16(&enc->out_buf, RoQ_INFO);
|
|
|
|
/* Size: 8 bytes */
|
|
bytestream_put_le32(&enc->out_buf, 8);
|
|
|
|
/* Unused argument */
|
|
bytestream_put_byte(&enc->out_buf, 0x00);
|
|
bytestream_put_byte(&enc->out_buf, 0x00);
|
|
|
|
/* Width */
|
|
bytestream_put_le16(&enc->out_buf, enc->width);
|
|
|
|
/* Height */
|
|
bytestream_put_le16(&enc->out_buf, enc->height);
|
|
|
|
/* Unused in Quake 3, mimics the output of the real encoder */
|
|
bytestream_put_byte(&enc->out_buf, 0x08);
|
|
bytestream_put_byte(&enc->out_buf, 0x00);
|
|
bytestream_put_byte(&enc->out_buf, 0x04);
|
|
bytestream_put_byte(&enc->out_buf, 0x00);
|
|
}
|
|
|
|
static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *frame, int *got_packet)
|
|
{
|
|
RoqContext *enc = avctx->priv_data;
|
|
int size, ret;
|
|
|
|
enc->avctx = avctx;
|
|
|
|
enc->frame_to_enc = frame;
|
|
|
|
if (frame->quality)
|
|
enc->lambda = frame->quality - 1;
|
|
else
|
|
enc->lambda = 2*ROQ_LAMBDA_SCALE;
|
|
|
|
/* 138 bits max per 8x8 block +
|
|
* 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */
|
|
size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8;
|
|
if ((ret = ff_alloc_packet2(avctx, pkt, size, 0)) < 0)
|
|
return ret;
|
|
enc->out_buf = pkt->data;
|
|
|
|
/* Check for I-frame */
|
|
if (enc->framesSinceKeyframe == avctx->gop_size)
|
|
enc->framesSinceKeyframe = 0;
|
|
|
|
if (enc->first_frame) {
|
|
/* Alloc memory for the reconstruction data (we must know the stride
|
|
for that) */
|
|
if ((ret = ff_get_buffer(avctx, enc->current_frame, 0)) < 0 ||
|
|
(ret = ff_get_buffer(avctx, enc->last_frame, 0)) < 0)
|
|
return ret;
|
|
|
|
/* Before the first video frame, write a "video info" chunk */
|
|
roq_write_video_info_chunk(enc);
|
|
|
|
enc->first_frame = 0;
|
|
}
|
|
|
|
/* Encode the actual frame */
|
|
ret = roq_encode_video(enc);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pkt->size = enc->out_buf - pkt->data;
|
|
if (enc->framesSinceKeyframe == 1)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(RoqContext, x)
|
|
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "quake3_compat", "Whether to respect known limitations in Quake 3 decoder", OFFSET(quake3_compat), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass roq_class = {
|
|
.class_name = "RoQ",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_roq_encoder = {
|
|
.name = "roqvideo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_ROQ,
|
|
.priv_data_size = sizeof(RoqContext),
|
|
.init = roq_encode_init,
|
|
.encode2 = roq_encode_frame,
|
|
.close = roq_encode_end,
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ444P,
|
|
AV_PIX_FMT_NONE },
|
|
.priv_class = &roq_class,
|
|
};
|