mirror of
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586 lines
20 KiB
C
586 lines
20 KiB
C
/*
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* SVQ1 Encoder
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* Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
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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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* Sorenson Vector Quantizer #1 (SVQ1) video codec.
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* For more information of the SVQ1 algorithm, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#include "h263.h"
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#include "internal.h"
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#include "svq1.h"
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#include "svq1enc_cb.h"
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#undef NDEBUG
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#include <assert.h>
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typedef struct SVQ1Context {
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MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independent of MpegEncContext, so this will be removed then (FIXME/XXX)
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AVCodecContext *avctx;
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DSPContext dsp;
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AVFrame picture;
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AVFrame current_picture;
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AVFrame last_picture;
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PutBitContext pb;
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GetBitContext gb;
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PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
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int frame_width;
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int frame_height;
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/* Y plane block dimensions */
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int y_block_width;
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int y_block_height;
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/* U & V plane (C planes) block dimensions */
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int c_block_width;
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int c_block_height;
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uint16_t *mb_type;
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uint32_t *dummy;
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int16_t (*motion_val8[3])[2];
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int16_t (*motion_val16[3])[2];
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int64_t rd_total;
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uint8_t *scratchbuf;
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} SVQ1Context;
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static void svq1_write_header(SVQ1Context *s, int frame_type)
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{
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int i;
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/* frame code */
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put_bits(&s->pb, 22, 0x20);
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/* temporal reference (sure hope this is a "don't care") */
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put_bits(&s->pb, 8, 0x00);
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/* frame type */
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put_bits(&s->pb, 2, frame_type - 1);
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if (frame_type == AV_PICTURE_TYPE_I) {
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/* no checksum since frame code is 0x20 */
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/* no embedded string either */
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/* output 5 unknown bits (2 + 2 + 1) */
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put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
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i= ff_match_2uint16(ff_svq1_frame_size_table, FF_ARRAY_ELEMS(ff_svq1_frame_size_table), s->frame_width, s->frame_height);
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put_bits(&s->pb, 3, i);
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if (i == 7)
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{
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put_bits(&s->pb, 12, s->frame_width);
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put_bits(&s->pb, 12, s->frame_height);
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}
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}
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/* no checksum or extra data (next 2 bits get 0) */
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put_bits(&s->pb, 2, 0);
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}
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#define QUALITY_THRESHOLD 100
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#define THRESHOLD_MULTIPLIER 0.6
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#if HAVE_ALTIVEC
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#undef vector
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#endif
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static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra){
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int count, y, x, i, j, split, best_mean, best_score, best_count;
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int best_vector[6];
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int block_sum[7]= {0, 0, 0, 0, 0, 0};
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int w= 2<<((level+2)>>1);
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int h= 2<<((level+1)>>1);
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int size=w*h;
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int16_t block[7][256];
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const int8_t *codebook_sum, *codebook;
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const uint16_t (*mean_vlc)[2];
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const uint8_t (*multistage_vlc)[2];
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best_score=0;
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//FIXME optimize, this doenst need to be done multiple times
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if(intra){
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codebook_sum= svq1_intra_codebook_sum[level];
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codebook= ff_svq1_intra_codebooks[level];
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mean_vlc= ff_svq1_intra_mean_vlc;
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multistage_vlc= ff_svq1_intra_multistage_vlc[level];
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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int v= src[x + y*stride];
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block[0][x + w*y]= v;
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best_score += v*v;
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block_sum[0] += v;
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}
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}
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}else{
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codebook_sum= svq1_inter_codebook_sum[level];
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codebook= ff_svq1_inter_codebooks[level];
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mean_vlc= ff_svq1_inter_mean_vlc + 256;
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multistage_vlc= ff_svq1_inter_multistage_vlc[level];
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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int v= src[x + y*stride] - ref[x + y*stride];
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block[0][x + w*y]= v;
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best_score += v*v;
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block_sum[0] += v;
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}
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}
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}
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best_count=0;
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best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
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best_mean= (block_sum[0] + (size>>1)) >> (level+3);
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if(level<4){
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for(count=1; count<7; count++){
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int best_vector_score= INT_MAX;
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int best_vector_sum=-999, best_vector_mean=-999;
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const int stage= count-1;
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const int8_t *vector;
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for(i=0; i<16; i++){
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int sum= codebook_sum[stage*16 + i];
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int sqr, diff, score;
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vector = codebook + stage*size*16 + i*size;
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sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
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diff= block_sum[stage] - sum;
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score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
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if(score < best_vector_score){
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int mean= (diff + (size>>1)) >> (level+3);
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assert(mean >-300 && mean<300);
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mean= av_clip(mean, intra?0:-256, 255);
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best_vector_score= score;
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best_vector[stage]= i;
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best_vector_sum= sum;
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best_vector_mean= mean;
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}
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}
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assert(best_vector_mean != -999);
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vector= codebook + stage*size*16 + best_vector[stage]*size;
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for(j=0; j<size; j++){
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block[stage+1][j] = block[stage][j] - vector[j];
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}
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block_sum[stage+1]= block_sum[stage] - best_vector_sum;
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best_vector_score +=
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lambda*(+ 1 + 4*count
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+ multistage_vlc[1+count][1]
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+ mean_vlc[best_vector_mean][1]);
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if(best_vector_score < best_score){
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best_score= best_vector_score;
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best_count= count;
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best_mean= best_vector_mean;
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}
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}
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}
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split=0;
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if(best_score > threshold && level){
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int score=0;
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int offset= (level&1) ? stride*h/2 : w/2;
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PutBitContext backup[6];
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for(i=level-1; i>=0; i--){
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backup[i]= s->reorder_pb[i];
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}
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score += encode_block(s, src , ref , decoded , stride, level-1, threshold>>1, lambda, intra);
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score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
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score += lambda;
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if(score < best_score){
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best_score= score;
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split=1;
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}else{
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for(i=level-1; i>=0; i--){
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s->reorder_pb[i]= backup[i];
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}
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}
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}
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if (level > 0)
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put_bits(&s->reorder_pb[level], 1, split);
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if(!split){
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assert((best_mean >= 0 && best_mean<256) || !intra);
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assert(best_mean >= -256 && best_mean<256);
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assert(best_count >=0 && best_count<7);
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assert(level<4 || best_count==0);
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/* output the encoding */
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put_bits(&s->reorder_pb[level],
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multistage_vlc[1 + best_count][1],
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multistage_vlc[1 + best_count][0]);
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put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
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mean_vlc[best_mean][0]);
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for (i = 0; i < best_count; i++){
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assert(best_vector[i]>=0 && best_vector[i]<16);
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put_bits(&s->reorder_pb[level], 4, best_vector[i]);
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}
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
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}
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}
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}
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return best_score;
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}
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static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
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int width, int height, int src_stride, int stride)
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{
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int x, y;
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int i;
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int block_width, block_height;
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int level;
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int threshold[6];
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uint8_t *src = s->scratchbuf + stride * 16;
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const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
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/* figure out the acceptable level thresholds in advance */
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threshold[5] = QUALITY_THRESHOLD;
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for (level = 4; level >= 0; level--)
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threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
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block_width = (width + 15) / 16;
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block_height = (height + 15) / 16;
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if(s->picture.pict_type == AV_PICTURE_TYPE_P){
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s->m.avctx= s->avctx;
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s->m.current_picture_ptr= &s->m.current_picture;
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s->m.last_picture_ptr = &s->m.last_picture;
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s->m.last_picture.data[0]= ref_plane;
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s->m.linesize=
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s->m.last_picture.linesize[0]=
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s->m.new_picture.linesize[0]=
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s->m.current_picture.linesize[0]= stride;
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s->m.width= width;
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s->m.height= height;
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s->m.mb_width= block_width;
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s->m.mb_height= block_height;
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s->m.mb_stride= s->m.mb_width+1;
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s->m.b8_stride= 2*s->m.mb_width+1;
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s->m.f_code=1;
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s->m.pict_type= s->picture.pict_type;
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s->m.me_method= s->avctx->me_method;
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s->m.me.scene_change_score=0;
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s->m.flags= s->avctx->flags;
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// s->m.out_format = FMT_H263;
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// s->m.unrestricted_mv= 1;
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s->m.lambda= s->picture.quality;
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s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
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s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
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if(!s->motion_val8[plane]){
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s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
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s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
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}
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s->m.mb_type= s->mb_type;
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//dummies, to avoid segfaults
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s->m.current_picture.mb_mean= (uint8_t *)s->dummy;
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s->m.current_picture.mb_var= (uint16_t*)s->dummy;
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s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
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s->m.current_picture.mb_type= s->dummy;
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s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
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s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
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s->m.dsp= s->dsp; //move
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ff_init_me(&s->m);
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s->m.me.dia_size= s->avctx->dia_size;
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s->m.first_slice_line=1;
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for (y = 0; y < block_height; y++) {
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s->m.new_picture.data[0]= src - y*16*stride; //ugly
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s->m.mb_y= y;
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for(i=0; i<16 && i + 16*y<height; i++){
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memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
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for(x=width; x<16*block_width; x++)
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src[i*stride+x]= src[i*stride+x-1];
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}
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for(; i<16 && i + 16*y<16*block_height; i++)
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memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
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for (x = 0; x < block_width; x++) {
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s->m.mb_x= x;
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ff_init_block_index(&s->m);
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ff_update_block_index(&s->m);
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ff_estimate_p_frame_motion(&s->m, x, y);
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}
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s->m.first_slice_line=0;
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}
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ff_fix_long_p_mvs(&s->m);
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ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
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}
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s->m.first_slice_line=1;
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for (y = 0; y < block_height; y++) {
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for(i=0; i<16 && i + 16*y<height; i++){
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memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
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for(x=width; x<16*block_width; x++)
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src[i*stride+x]= src[i*stride+x-1];
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}
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for(; i<16 && i + 16*y<16*block_height; i++)
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memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
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s->m.mb_y= y;
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for (x = 0; x < block_width; x++) {
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uint8_t reorder_buffer[3][6][7*32];
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int count[3][6];
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int offset = y * 16 * stride + x * 16;
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uint8_t *decoded= decoded_plane + offset;
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uint8_t *ref= ref_plane + offset;
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int score[4]={0,0,0,0}, best;
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uint8_t *temp = s->scratchbuf;
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if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
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av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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s->m.mb_x= x;
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ff_init_block_index(&s->m);
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ff_update_block_index(&s->m);
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if(s->picture.pict_type == AV_PICTURE_TYPE_I || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
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for(i=0; i<6; i++){
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init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
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}
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if(s->picture.pict_type == AV_PICTURE_TYPE_P){
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const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
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put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
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score[0]= vlc[1]*lambda;
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}
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score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
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for(i=0; i<6; i++){
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count[0][i]= put_bits_count(&s->reorder_pb[i]);
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flush_put_bits(&s->reorder_pb[i]);
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}
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}else
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score[0]= INT_MAX;
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best=0;
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if(s->picture.pict_type == AV_PICTURE_TYPE_P){
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const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
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int mx, my, pred_x, pred_y, dxy;
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int16_t *motion_ptr;
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motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
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if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
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for(i=0; i<6; i++)
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init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
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put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
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s->m.pb= s->reorder_pb[5];
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mx= motion_ptr[0];
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my= motion_ptr[1];
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assert(mx>=-32 && mx<=31);
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assert(my>=-32 && my<=31);
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assert(pred_x>=-32 && pred_x<=31);
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assert(pred_y>=-32 && pred_y<=31);
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ff_h263_encode_motion(&s->m, mx - pred_x, 1);
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ff_h263_encode_motion(&s->m, my - pred_y, 1);
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s->reorder_pb[5]= s->m.pb;
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score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
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dxy= (mx&1) + 2*(my&1);
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s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
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score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
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best= score[1] <= score[0];
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vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
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score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
|
|
score[2]+= vlc[1]*lambda;
|
|
if(score[2] < score[best] && mx==0 && my==0){
|
|
best=2;
|
|
s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
|
|
for(i=0; i<6; i++){
|
|
count[2][i]=0;
|
|
}
|
|
put_bits(&s->pb, vlc[1], vlc[0]);
|
|
}
|
|
}
|
|
|
|
if(best==1){
|
|
for(i=0; i<6; i++){
|
|
count[1][i]= put_bits_count(&s->reorder_pb[i]);
|
|
flush_put_bits(&s->reorder_pb[i]);
|
|
}
|
|
}else{
|
|
motion_ptr[0 ] = motion_ptr[1 ]=
|
|
motion_ptr[2 ] = motion_ptr[3 ]=
|
|
motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
|
|
motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
|
|
}
|
|
}
|
|
|
|
s->rd_total += score[best];
|
|
|
|
for(i=5; i>=0; i--){
|
|
ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
|
|
}
|
|
if(best==0){
|
|
s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
|
|
}
|
|
}
|
|
s->m.first_slice_line=0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int svq1_encode_init(AVCodecContext *avctx)
|
|
{
|
|
SVQ1Context * const s = avctx->priv_data;
|
|
|
|
dsputil_init(&s->dsp, avctx);
|
|
avctx->coded_frame= (AVFrame*)&s->picture;
|
|
|
|
s->frame_width = avctx->width;
|
|
s->frame_height = avctx->height;
|
|
|
|
s->y_block_width = (s->frame_width + 15) / 16;
|
|
s->y_block_height = (s->frame_height + 15) / 16;
|
|
|
|
s->c_block_width = (s->frame_width / 4 + 15) / 16;
|
|
s->c_block_height = (s->frame_height / 4 + 15) / 16;
|
|
|
|
s->avctx= avctx;
|
|
s->m.avctx= avctx;
|
|
s->m.me.temp =
|
|
s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
|
|
s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
|
|
s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
|
|
s->mb_type = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
|
|
s->dummy = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
|
|
h263_encode_init(&s->m); //mv_penalty
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
|
|
int buf_size, void *data)
|
|
{
|
|
SVQ1Context * const s = avctx->priv_data;
|
|
AVFrame *pict = data;
|
|
AVFrame * const p= (AVFrame*)&s->picture;
|
|
AVFrame temp;
|
|
int i;
|
|
|
|
if(avctx->pix_fmt != PIX_FMT_YUV410P){
|
|
av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
|
|
return -1;
|
|
}
|
|
|
|
if(!s->current_picture.data[0]){
|
|
avctx->get_buffer(avctx, &s->current_picture);
|
|
avctx->get_buffer(avctx, &s->last_picture);
|
|
s->scratchbuf = av_malloc(s->current_picture.linesize[0] * 16 * 2);
|
|
}
|
|
|
|
temp= s->current_picture;
|
|
s->current_picture= s->last_picture;
|
|
s->last_picture= temp;
|
|
|
|
init_put_bits(&s->pb, buf, buf_size);
|
|
|
|
*p = *pict;
|
|
p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
|
|
p->key_frame = p->pict_type == AV_PICTURE_TYPE_I;
|
|
|
|
svq1_write_header(s, p->pict_type);
|
|
for(i=0; i<3; i++){
|
|
if(svq1_encode_plane(s, i,
|
|
s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
|
|
s->frame_width / (i?4:1), s->frame_height / (i?4:1),
|
|
s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
|
|
return -1;
|
|
}
|
|
|
|
// align_put_bits(&s->pb);
|
|
while(put_bits_count(&s->pb) & 31)
|
|
put_bits(&s->pb, 1, 0);
|
|
|
|
flush_put_bits(&s->pb);
|
|
|
|
return put_bits_count(&s->pb) / 8;
|
|
}
|
|
|
|
static av_cold int svq1_encode_end(AVCodecContext *avctx)
|
|
{
|
|
SVQ1Context * const s = avctx->priv_data;
|
|
int i;
|
|
|
|
av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
|
|
|
|
av_freep(&s->m.me.scratchpad);
|
|
av_freep(&s->m.me.map);
|
|
av_freep(&s->m.me.score_map);
|
|
av_freep(&s->mb_type);
|
|
av_freep(&s->dummy);
|
|
av_freep(&s->scratchbuf);
|
|
|
|
for(i=0; i<3; i++){
|
|
av_freep(&s->motion_val8[i]);
|
|
av_freep(&s->motion_val16[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
AVCodec ff_svq1_encoder = {
|
|
"svq1",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_SVQ1,
|
|
sizeof(SVQ1Context),
|
|
svq1_encode_init,
|
|
svq1_encode_frame,
|
|
svq1_encode_end,
|
|
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV410P, PIX_FMT_NONE},
|
|
.long_name= NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
|
|
};
|