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-rw-r--r--libavfilter/vf_idet.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c
new file mode 100644
index 0000000000..5430aba628
--- /dev/null
+++ b/libavfilter/vf_idet.c
@@ -0,0 +1,464 @@
+/*
+ * Copyright (C) 2012 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <float.h> /* FLT_MAX */
+
+#include "libavutil/cpu.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "internal.h"
+#include "vf_idet.h"
+
+#define OFFSET(x) offsetof(IDETContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption idet_options[] = {
+ { "intl_thres", "set interlacing threshold", OFFSET(interlace_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.04}, -1, FLT_MAX, FLAGS },
+ { "prog_thres", "set progressive threshold", OFFSET(progressive_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.5}, -1, FLT_MAX, FLAGS },
+ { "rep_thres", "set repeat threshold", OFFSET(repeat_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 3.0}, -1, FLT_MAX, FLAGS },
+ { "half_life", "half life of cumulative statistics", OFFSET(half_life), AV_OPT_TYPE_FLOAT, {.dbl = 0.0}, -1, INT_MAX, FLAGS },
+ { "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 },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(idet);
+
+static const char *type2str(Type type)
+{
+ switch(type) {
+ case TFF : return "tff";
+ case BFF : return "bff";
+ case PROGRESSIVE : return "progressive";
+ case UNDETERMINED : return "undetermined";
+ }
+ return NULL;
+}
+
+#define PRECISION 1048576
+
+static uint64_t uintpow(uint64_t b,unsigned int e)
+{
+ uint64_t r=1;
+ while(e--) r*=b;
+ return r;
+}
+
+static int av_dict_set_fxp(AVDictionary **pm, const char *key, uint64_t value, unsigned int digits,
+ int flags)
+{
+ char valuestr[44];
+ uint64_t print_precision = uintpow(10, digits);
+
+ value = av_rescale(value, print_precision, PRECISION);
+
+ snprintf(valuestr, sizeof(valuestr), "%"PRId64".%0*"PRId64,
+ value / print_precision, digits, value % print_precision);
+
+ return av_dict_set(pm, key, valuestr, flags);
+}
+
+static const char *rep2str(RepeatedField repeated_field)
+{
+ switch(repeated_field) {
+ case REPEAT_NONE : return "neither";
+ case REPEAT_TOP : return "top";
+ case REPEAT_BOTTOM : return "bottom";
+ }
+ return NULL;
+}
+
+int ff_idet_filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w)
+{
+ int x;
+ int ret=0;
+
+ for(x=0; x<w; x++){
+ int v = (*a++ + *c++) - 2 * *b++;
+ ret += FFABS(v);
+ }
+
+ return ret;
+}
+
+int ff_idet_filter_line_c_16bit(const uint16_t *a, const uint16_t *b, const uint16_t *c, int w)
+{
+ int x;
+ int ret=0;
+
+ for(x=0; x<w; x++){
+ int v = (*a++ + *c++) - 2 * *b++;
+ ret += FFABS(v);
+ }
+
+ return ret;
+}
+
+static void filter(AVFilterContext *ctx)
+{
+ IDETContext *idet = ctx->priv;
+ int y, i;
+ int64_t alpha[2]={0};
+ int64_t delta=0;
+ int64_t gamma[2]={0};
+ Type type, best_type;
+ RepeatedField repeat;
+ int match = 0;
+ AVDictionary **metadata = avpriv_frame_get_metadatap(idet->cur);
+
+ for (i = 0; i < idet->csp->nb_components; i++) {
+ int w = idet->cur->width;
+ int h = idet->cur->height;
+ int refs = idet->cur->linesize[i];
+
+ if (i && i<3) {
+ w = FF_CEIL_RSHIFT(w, idet->csp->log2_chroma_w);
+ h = FF_CEIL_RSHIFT(h, idet->csp->log2_chroma_h);
+ }
+
+ for (y = 2; y < h - 2; y++) {
+ uint8_t *prev = &idet->prev->data[i][y*refs];
+ uint8_t *cur = &idet->cur ->data[i][y*refs];
+ uint8_t *next = &idet->next->data[i][y*refs];
+ alpha[ y &1] += idet->filter_line(cur-refs, prev, cur+refs, w);
+ alpha[(y^1)&1] += idet->filter_line(cur-refs, next, cur+refs, w);
+ delta += idet->filter_line(cur-refs, cur, cur+refs, w);
+ gamma[(y^1)&1] += idet->filter_line(cur , prev, cur , w);
+ }
+ }
+
+ if (alpha[0] > idet->interlace_threshold * alpha[1]){
+ type = TFF;
+ }else if(alpha[1] > idet->interlace_threshold * alpha[0]){
+ type = BFF;
+ }else if(alpha[1] > idet->progressive_threshold * delta){
+ type = PROGRESSIVE;
+ }else{
+ type = UNDETERMINED;
+ }
+
+ if ( gamma[0] > idet->repeat_threshold * gamma[1] ){
+ repeat = REPEAT_TOP;
+ } else if ( gamma[1] > idet->repeat_threshold * gamma[0] ){
+ repeat = REPEAT_BOTTOM;
+ } else {
+ repeat = REPEAT_NONE;
+ }
+
+ memmove(idet->history+1, idet->history, HIST_SIZE-1);
+ idet->history[0] = type;
+ best_type = UNDETERMINED;
+ for(i=0; i<HIST_SIZE; i++){
+ if(idet->history[i] != UNDETERMINED){
+ if(best_type == UNDETERMINED)
+ best_type = idet->history[i];
+
+ if(idet->history[i] == best_type) {
+ match++;
+ }else{
+ match=0;
+ break;
+ }
+ }
+ }
+ if(idet->last_type == UNDETERMINED){
+ if(match ) idet->last_type = best_type;
+ }else{
+ if(match>2) idet->last_type = best_type;
+ }
+
+ if (idet->last_type == TFF){
+ idet->cur->top_field_first = 1;
+ idet->cur->interlaced_frame = 1;
+ }else if(idet->last_type == BFF){
+ idet->cur->top_field_first = 0;
+ idet->cur->interlaced_frame = 1;
+ }else if(idet->last_type == PROGRESSIVE){
+ idet->cur->interlaced_frame = 0;
+ }
+
+ for(i=0; i<3; i++)
+ idet->repeats[i] = av_rescale(idet->repeats [i], idet->decay_coefficient, PRECISION);
+
+ for(i=0; i<4; i++){
+ idet->prestat [i] = av_rescale(idet->prestat [i], idet->decay_coefficient, PRECISION);
+ idet->poststat[i] = av_rescale(idet->poststat[i], idet->decay_coefficient, PRECISION);
+ }
+
+ idet->total_repeats [ repeat] ++;
+ idet->repeats [ repeat] += PRECISION;
+
+ idet->total_prestat [ type] ++;
+ idet->prestat [ type] += PRECISION;
+
+ idet->total_poststat[idet->last_type] ++;
+ idet->poststat [idet->last_type] += PRECISION;
+
+ av_log(ctx, AV_LOG_DEBUG, "Repeated Field:%12s, Single frame:%12s, Multi frame:%12s\n",
+ rep2str(repeat), type2str(type), type2str(idet->last_type));
+
+ av_dict_set (metadata, "lavfi.idet.repeated.current_frame", rep2str(repeat), 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.repeated.neither", idet->repeats[REPEAT_NONE], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.repeated.top", idet->repeats[REPEAT_TOP], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.repeated.bottom", idet->repeats[REPEAT_BOTTOM], 2, 0);
+
+ av_dict_set (metadata, "lavfi.idet.single.current_frame", type2str(type), 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.single.tff", idet->prestat[TFF], 2 , 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.single.bff", idet->prestat[BFF], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.single.progressive", idet->prestat[PROGRESSIVE], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.single.undetermined", idet->prestat[UNDETERMINED], 2, 0);
+
+ av_dict_set (metadata, "lavfi.idet.multiple.current_frame", type2str(idet->last_type), 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.multiple.tff", idet->poststat[TFF], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.multiple.bff", idet->poststat[BFF], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.multiple.progressive", idet->poststat[PROGRESSIVE], 2, 0);
+ av_dict_set_fxp(metadata, "lavfi.idet.multiple.undetermined", idet->poststat[UNDETERMINED], 2, 0);
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *picref)
+{
+ AVFilterContext *ctx = link->dst;
+ IDETContext *idet = ctx->priv;
+
+ // initial frame(s) and not interlaced, just pass through for
+ // the analyze_interlaced_flag mode
+ if (idet->analyze_interlaced_flag &&
+ !picref->interlaced_frame &&
+ !idet->next) {
+ return ff_filter_frame(ctx->outputs[0], picref);
+ }
+ if (idet->analyze_interlaced_flag_done) {
+ if (picref->interlaced_frame && idet->interlaced_flag_accuracy < 0)
+ picref->interlaced_frame = 0;
+ return ff_filter_frame(ctx->outputs[0], picref);
+ }
+
+ av_frame_free(&idet->prev);
+
+ if( picref->width != link->w
+ || picref->height != link->h
+ || picref->format != link->format) {
+ link->dst->inputs[0]->format = picref->format;
+ link->dst->inputs[0]->w = picref->width;
+ link->dst->inputs[0]->h = picref->height;
+
+ av_frame_free(&idet->cur );
+ av_frame_free(&idet->next);
+ }
+
+ idet->prev = idet->cur;
+ idet->cur = idet->next;
+ idet->next = picref;
+
+ if (!idet->cur &&
+ !(idet->cur = av_frame_clone(idet->next)))
+ return AVERROR(ENOMEM);
+
+ if (!idet->prev)
+ return 0;
+
+ if (!idet->csp)
+ idet->csp = av_pix_fmt_desc_get(link->format);
+ if (idet->csp->comp[0].depth_minus1 / 8 == 1){
+ idet->filter_line = (ff_idet_filter_func)ff_idet_filter_line_c_16bit;
+ if (ARCH_X86)
+ ff_idet_init_x86(idet, 1);
+ }
+
+ if (idet->analyze_interlaced_flag) {
+ if (idet->cur->interlaced_frame) {
+ idet->cur->interlaced_frame = 0;
+ filter(ctx);
+ if (idet->last_type == PROGRESSIVE) {
+ idet->interlaced_flag_accuracy --;
+ idet->analyze_interlaced_flag --;
+ } else if (idet->last_type != UNDETERMINED) {
+ idet->interlaced_flag_accuracy ++;
+ idet->analyze_interlaced_flag --;
+ }
+ if (idet->analyze_interlaced_flag == 1) {
+ ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur));
+
+ if (idet->next->interlaced_frame && idet->interlaced_flag_accuracy < 0)
+ idet->next->interlaced_frame = 0;
+ idet->analyze_interlaced_flag_done = 1;
+ av_log(ctx, AV_LOG_INFO, "Final flag accuracy %d\n", idet->interlaced_flag_accuracy);
+ return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->next));
+ }
+ }
+ } else {
+ filter(ctx);
+ }
+
+ return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur));
+}
+
+static int request_frame(AVFilterLink *link)
+{
+ AVFilterContext *ctx = link->src;
+ IDETContext *idet = ctx->priv;
+
+ do {
+ int ret;
+
+ if (idet->eof)
+ return AVERROR_EOF;
+
+ ret = ff_request_frame(link->src->inputs[0]);
+
+ if (ret == AVERROR_EOF && idet->cur && !idet->analyze_interlaced_flag_done) {
+ AVFrame *next = av_frame_clone(idet->next);
+
+ if (!next)
+ return AVERROR(ENOMEM);
+
+ filter_frame(link->src->inputs[0], next);
+ idet->eof = 1;
+ } else if (ret < 0) {
+ return ret;
+ }
+ } while (link->frame_requested);
+
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ IDETContext *idet = ctx->priv;
+ int level = strncmp(ctx->name, "auto-inserted", 13) ? AV_LOG_INFO : AV_LOG_DEBUG;
+
+ av_log(ctx, level, "Repeated Fields: Neither:%6"PRId64" Top:%6"PRId64" Bottom:%6"PRId64"\n",
+ idet->total_repeats[REPEAT_NONE],
+ idet->total_repeats[REPEAT_TOP],
+ idet->total_repeats[REPEAT_BOTTOM]
+ );
+ av_log(ctx, level, "Single frame detection: TFF:%6"PRId64" BFF:%6"PRId64" Progressive:%6"PRId64" Undetermined:%6"PRId64"\n",
+ idet->total_prestat[TFF],
+ idet->total_prestat[BFF],
+ idet->total_prestat[PROGRESSIVE],
+ idet->total_prestat[UNDETERMINED]
+ );
+ av_log(ctx, level, "Multi frame detection: TFF:%6"PRId64" BFF:%6"PRId64" Progressive:%6"PRId64" Undetermined:%6"PRId64"\n",
+ idet->total_poststat[TFF],
+ idet->total_poststat[BFF],
+ idet->total_poststat[PROGRESSIVE],
+ idet->total_poststat[UNDETERMINED]
+ );
+
+ av_frame_free(&idet->prev);
+ av_frame_free(&idet->cur );
+ av_frame_free(&idet->next);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUV420P9,
+ AV_PIX_FMT_YUV422P9,
+ AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10,
+ AV_PIX_FMT_YUV422P10,
+ AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV422P12,
+ AV_PIX_FMT_YUV444P12,
+ AV_PIX_FMT_YUV420P14,
+ AV_PIX_FMT_YUV422P14,
+ AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV420P16,
+ AV_PIX_FMT_YUV422P16,
+ AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P,
+ AV_PIX_FMT_NONE
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
+ return 0;
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ 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 = (uint64_t) round( 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);
+
+ return 0;
+}
+
+static const AVFilterPad idet_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad idet_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = request_frame
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_idet = {
+ .name = "idet",
+ .description = NULL_IF_CONFIG_SMALL("Interlace detect Filter."),
+ .priv_size = sizeof(IDETContext),
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = idet_inputs,
+ .outputs = idet_outputs,
+ .priv_class = &idet_class,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 22:44:02 +0000