diff options
Diffstat (limited to 'libavfilter/vf_idet.c')
-rw-r--r-- | libavfilter/vf_idet.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/libavfilter/vf_idet.c b/libavfilter/vf_idet.c new file mode 100644 index 0000000000..ed21eea467 --- /dev/null +++ b/libavfilter/vf_idet.c @@ -0,0 +1,405 @@ +/* + * 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 }, + { 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; + + if (idet->prev) + av_frame_free(&idet->prev); + idet->prev = idet->cur; + idet->cur = idet->next; + idet->next = picref; + + if (!idet->cur) + return 0; + + if (!idet->prev) + idet->prev = av_frame_clone(idet->cur); + + 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); + } + + 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) { + 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 (!idet->cur); + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + IDETContext *idet = ctx->priv; + + av_log(ctx, AV_LOG_INFO, "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, AV_LOG_INFO, "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, AV_LOG_INFO, "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_YUV420P10, + AV_PIX_FMT_YUV422P10, + AV_PIX_FMT_YUV444P10, + 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, +}; 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