480 lines
15 KiB
C
480 lines
15 KiB
C
/*
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* Copyright (C) 2012 Michael Niedermayer <michaelni@gmx.at>
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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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#include <float.h> /* FLT_MAX */
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "internal.h"
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#include "vf_idet.h"
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#define OFFSET(x) offsetof(IDETContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption idet_options[] = {
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{ "intl_thres", "set interlacing threshold", OFFSET(interlace_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.04}, -1, FLT_MAX, FLAGS },
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{ "prog_thres", "set progressive threshold", OFFSET(progressive_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.5}, -1, FLT_MAX, FLAGS },
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{ "rep_thres", "set repeat threshold", OFFSET(repeat_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 3.0}, -1, FLT_MAX, FLAGS },
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{ "half_life", "half life of cumulative statistics", OFFSET(half_life), AV_OPT_TYPE_FLOAT, {.dbl = 0.0}, -1, INT_MAX, FLAGS },
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{ "analyze_interlaced_flag", "set number of frames to use to determine if the interlace flag is accurate", OFFSET(analyze_interlaced_flag), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(idet);
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static const char *type2str(Type type)
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{
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switch(type) {
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case TFF : return "tff";
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case BFF : return "bff";
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case PROGRESSIVE : return "progressive";
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case UNDETERMINED : return "undetermined";
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}
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return NULL;
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}
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#define PRECISION 1048576
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static uint64_t uintpow(uint64_t b,unsigned int e)
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{
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uint64_t r=1;
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while(e--) r*=b;
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return r;
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}
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static int av_dict_set_fxp(AVDictionary **pm, const char *key, uint64_t value, unsigned int digits,
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int flags)
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{
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char valuestr[44];
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uint64_t print_precision = uintpow(10, digits);
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value = av_rescale(value, print_precision, PRECISION);
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snprintf(valuestr, sizeof(valuestr), "%"PRId64".%0*"PRId64,
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value / print_precision, digits, value % print_precision);
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return av_dict_set(pm, key, valuestr, flags);
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}
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static const char *rep2str(RepeatedField repeated_field)
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{
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switch(repeated_field) {
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case REPEAT_NONE : return "neither";
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case REPEAT_TOP : return "top";
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case REPEAT_BOTTOM : return "bottom";
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}
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return NULL;
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}
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int ff_idet_filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w)
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{
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int x;
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int ret=0;
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for(x=0; x<w; x++){
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int v = (*a++ + *c++) - 2 * *b++;
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ret += FFABS(v);
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}
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return ret;
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}
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int ff_idet_filter_line_c_16bit(const uint16_t *a, const uint16_t *b, const uint16_t *c, int w)
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{
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int x;
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int ret=0;
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for(x=0; x<w; x++){
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int v = (*a++ + *c++) - 2 * *b++;
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ret += FFABS(v);
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}
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return ret;
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}
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static void filter(AVFilterContext *ctx)
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{
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IDETContext *idet = ctx->priv;
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int y, i;
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int64_t alpha[2]={0};
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int64_t delta=0;
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int64_t gamma[2]={0};
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Type type, best_type;
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RepeatedField repeat;
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int match = 0;
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AVDictionary **metadata = &idet->cur->metadata;
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for (i = 0; i < idet->csp->nb_components; i++) {
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int w = idet->cur->width;
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int h = idet->cur->height;
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int refs = idet->cur->linesize[i];
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if (i && i<3) {
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w = AV_CEIL_RSHIFT(w, idet->csp->log2_chroma_w);
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h = AV_CEIL_RSHIFT(h, idet->csp->log2_chroma_h);
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}
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for (y = 2; y < h - 2; y++) {
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uint8_t *prev = &idet->prev->data[i][y*refs];
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uint8_t *cur = &idet->cur ->data[i][y*refs];
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uint8_t *next = &idet->next->data[i][y*refs];
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alpha[ y &1] += idet->filter_line(cur-refs, prev, cur+refs, w);
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alpha[(y^1)&1] += idet->filter_line(cur-refs, next, cur+refs, w);
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delta += idet->filter_line(cur-refs, cur, cur+refs, w);
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gamma[(y^1)&1] += idet->filter_line(cur , prev, cur , w);
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}
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}
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if (alpha[0] > idet->interlace_threshold * alpha[1]){
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type = TFF;
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}else if(alpha[1] > idet->interlace_threshold * alpha[0]){
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type = BFF;
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}else if(alpha[1] > idet->progressive_threshold * delta){
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type = PROGRESSIVE;
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}else{
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type = UNDETERMINED;
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}
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if ( gamma[0] > idet->repeat_threshold * gamma[1] ){
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repeat = REPEAT_TOP;
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} else if ( gamma[1] > idet->repeat_threshold * gamma[0] ){
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repeat = REPEAT_BOTTOM;
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} else {
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repeat = REPEAT_NONE;
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}
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memmove(idet->history+1, idet->history, HIST_SIZE-1);
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idet->history[0] = type;
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best_type = UNDETERMINED;
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for(i=0; i<HIST_SIZE; i++){
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if(idet->history[i] != UNDETERMINED){
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if(best_type == UNDETERMINED)
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best_type = idet->history[i];
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if(idet->history[i] == best_type) {
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match++;
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}else{
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match=0;
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break;
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}
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}
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}
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if(idet->last_type == UNDETERMINED){
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if(match ) idet->last_type = best_type;
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}else{
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if(match>2) idet->last_type = best_type;
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}
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if (idet->last_type == TFF){
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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idet->cur->top_field_first = 1;
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idet->cur->interlaced_frame = 1;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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idet->cur->flags |= (AV_FRAME_FLAG_INTERLACED | AV_FRAME_FLAG_TOP_FIELD_FIRST);
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}else if(idet->last_type == BFF){
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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idet->cur->top_field_first = 0;
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idet->cur->interlaced_frame = 1;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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idet->cur->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
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idet->cur->flags |= AV_FRAME_FLAG_INTERLACED;
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}else if(idet->last_type == PROGRESSIVE){
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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idet->cur->interlaced_frame = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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idet->cur->flags &= ~AV_FRAME_FLAG_INTERLACED;
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}
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for(i=0; i<3; i++)
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idet->repeats[i] = av_rescale(idet->repeats [i], idet->decay_coefficient, PRECISION);
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for(i=0; i<4; i++){
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idet->prestat [i] = av_rescale(idet->prestat [i], idet->decay_coefficient, PRECISION);
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idet->poststat[i] = av_rescale(idet->poststat[i], idet->decay_coefficient, PRECISION);
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}
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idet->total_repeats [ repeat] ++;
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idet->repeats [ repeat] += PRECISION;
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idet->total_prestat [ type] ++;
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idet->prestat [ type] += PRECISION;
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idet->total_poststat[idet->last_type] ++;
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idet->poststat [idet->last_type] += PRECISION;
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av_log(ctx, AV_LOG_DEBUG, "Repeated Field:%12s, Single frame:%12s, Multi frame:%12s\n",
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rep2str(repeat), type2str(type), type2str(idet->last_type));
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av_dict_set (metadata, "lavfi.idet.repeated.current_frame", rep2str(repeat), 0);
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av_dict_set_fxp(metadata, "lavfi.idet.repeated.neither", idet->repeats[REPEAT_NONE], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.repeated.top", idet->repeats[REPEAT_TOP], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.repeated.bottom", idet->repeats[REPEAT_BOTTOM], 2, 0);
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av_dict_set (metadata, "lavfi.idet.single.current_frame", type2str(type), 0);
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av_dict_set_fxp(metadata, "lavfi.idet.single.tff", idet->prestat[TFF], 2 , 0);
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av_dict_set_fxp(metadata, "lavfi.idet.single.bff", idet->prestat[BFF], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.single.progressive", idet->prestat[PROGRESSIVE], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.single.undetermined", idet->prestat[UNDETERMINED], 2, 0);
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av_dict_set (metadata, "lavfi.idet.multiple.current_frame", type2str(idet->last_type), 0);
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av_dict_set_fxp(metadata, "lavfi.idet.multiple.tff", idet->poststat[TFF], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.multiple.bff", idet->poststat[BFF], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.multiple.progressive", idet->poststat[PROGRESSIVE], 2, 0);
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av_dict_set_fxp(metadata, "lavfi.idet.multiple.undetermined", idet->poststat[UNDETERMINED], 2, 0);
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}
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static int filter_frame(AVFilterLink *link, AVFrame *picref)
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{
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AVFilterContext *ctx = link->dst;
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IDETContext *idet = ctx->priv;
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// initial frame(s) and not interlaced, just pass through for
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// the analyze_interlaced_flag mode
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if (idet->analyze_interlaced_flag &&
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!(picref->flags & AV_FRAME_FLAG_INTERLACED) &&
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!idet->next) {
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return ff_filter_frame(ctx->outputs[0], picref);
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}
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if (idet->analyze_interlaced_flag_done) {
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if ((picref->flags & AV_FRAME_FLAG_INTERLACED) && idet->interlaced_flag_accuracy < 0) {
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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picref->interlaced_frame = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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picref->flags &= ~AV_FRAME_FLAG_INTERLACED;
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}
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return ff_filter_frame(ctx->outputs[0], picref);
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}
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av_frame_free(&idet->prev);
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if( picref->width != link->w
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|| picref->height != link->h
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|| picref->format != link->format) {
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link->dst->inputs[0]->format = picref->format;
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link->dst->inputs[0]->w = picref->width;
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link->dst->inputs[0]->h = picref->height;
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av_frame_free(&idet->cur );
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av_frame_free(&idet->next);
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}
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idet->prev = idet->cur;
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idet->cur = idet->next;
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idet->next = picref;
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if (!idet->cur &&
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!(idet->cur = av_frame_clone(idet->next)))
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return AVERROR(ENOMEM);
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if (!idet->prev)
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return 0;
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if (!idet->csp)
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idet->csp = av_pix_fmt_desc_get(link->format);
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if (idet->csp->comp[0].depth > 8){
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idet->filter_line = (ff_idet_filter_func)ff_idet_filter_line_c_16bit;
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#if ARCH_X86
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ff_idet_init_x86(idet, 1);
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#endif
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}
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if (idet->analyze_interlaced_flag) {
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if (idet->cur->flags & AV_FRAME_FLAG_INTERLACED) {
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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idet->cur->interlaced_frame = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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idet->cur->flags &= ~AV_FRAME_FLAG_INTERLACED;
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filter(ctx);
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if (idet->last_type == PROGRESSIVE) {
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idet->interlaced_flag_accuracy --;
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idet->analyze_interlaced_flag --;
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} else if (idet->last_type != UNDETERMINED) {
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idet->interlaced_flag_accuracy ++;
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idet->analyze_interlaced_flag --;
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}
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if (idet->analyze_interlaced_flag == 1) {
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ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur));
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if ((idet->next->flags & AV_FRAME_FLAG_INTERLACED) && idet->interlaced_flag_accuracy < 0) {
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#if FF_API_INTERLACED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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idet->next->interlaced_frame = 0;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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idet->next->flags &= ~AV_FRAME_FLAG_INTERLACED;
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}
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idet->analyze_interlaced_flag_done = 1;
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av_log(ctx, AV_LOG_INFO, "Final flag accuracy %d\n", idet->interlaced_flag_accuracy);
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return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->next));
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}
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}
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} else {
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filter(ctx);
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}
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return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur));
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}
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static int request_frame(AVFilterLink *link)
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{
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AVFilterContext *ctx = link->src;
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IDETContext *idet = ctx->priv;
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int ret;
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if (idet->eof)
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return AVERROR_EOF;
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ret = ff_request_frame(link->src->inputs[0]);
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if (ret == AVERROR_EOF && idet->cur && !idet->analyze_interlaced_flag_done) {
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AVFrame *next = av_frame_clone(idet->next);
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if (!next)
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return AVERROR(ENOMEM);
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ret = filter_frame(link->src->inputs[0], next);
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idet->eof = 1;
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}
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return ret;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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IDETContext *idet = ctx->priv;
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av_log(ctx, AV_LOG_INFO, "Repeated Fields: Neither:%6"PRId64" Top:%6"PRId64" Bottom:%6"PRId64"\n",
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idet->total_repeats[REPEAT_NONE],
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idet->total_repeats[REPEAT_TOP],
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idet->total_repeats[REPEAT_BOTTOM]
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);
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av_log(ctx, AV_LOG_INFO, "Single frame detection: TFF:%6"PRId64" BFF:%6"PRId64" Progressive:%6"PRId64" Undetermined:%6"PRId64"\n",
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idet->total_prestat[TFF],
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idet->total_prestat[BFF],
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idet->total_prestat[PROGRESSIVE],
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idet->total_prestat[UNDETERMINED]
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);
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av_log(ctx, AV_LOG_INFO, "Multi frame detection: TFF:%6"PRId64" BFF:%6"PRId64" Progressive:%6"PRId64" Undetermined:%6"PRId64"\n",
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idet->total_poststat[TFF],
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idet->total_poststat[BFF],
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idet->total_poststat[PROGRESSIVE],
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idet->total_poststat[UNDETERMINED]
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);
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av_frame_free(&idet->prev);
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av_frame_free(&idet->cur );
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av_frame_free(&idet->next);
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}
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUV420P9,
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AV_PIX_FMT_YUV422P9,
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AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_YUV422P10,
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AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_YUV422P12,
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AV_PIX_FMT_YUV444P12,
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AV_PIX_FMT_YUV420P14,
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AV_PIX_FMT_YUV422P14,
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AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16,
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AV_PIX_FMT_YUV422P16,
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AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_YUVA422P,
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AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_NONE
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};
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static av_cold int init(AVFilterContext *ctx)
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{
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IDETContext *idet = ctx->priv;
|
|
|
|
idet->eof = 0;
|
|
idet->last_type = UNDETERMINED;
|
|
memset(idet->history, UNDETERMINED, HIST_SIZE);
|
|
|
|
if( idet->half_life > 0 )
|
|
idet->decay_coefficient = lrint( PRECISION * exp2(-1.0 / idet->half_life) );
|
|
else
|
|
idet->decay_coefficient = PRECISION;
|
|
|
|
idet->filter_line = ff_idet_filter_line_c;
|
|
|
|
#if ARCH_X86
|
|
ff_idet_init_x86(idet, 0);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const AVFilterPad idet_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad idet_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.request_frame = request_frame
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_idet = {
|
|
.name = "idet",
|
|
.description = NULL_IF_CONFIG_SMALL("Interlace detect Filter."),
|
|
.priv_size = sizeof(IDETContext),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.flags = AVFILTER_FLAG_METADATA_ONLY,
|
|
FILTER_INPUTS(idet_inputs),
|
|
FILTER_OUTPUTS(idet_outputs),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.priv_class = &idet_class,
|
|
};
|