yading@10: /* yading@10: * Copyright (C) 2012 Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include /* FLT_MAX */ yading@10: yading@10: #include "libavutil/cpu.h" yading@10: #include "libavutil/common.h" yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/pixdesc.h" yading@10: #include "avfilter.h" yading@10: #include "internal.h" yading@10: yading@10: #define HIST_SIZE 4 yading@10: yading@10: typedef enum { yading@10: TFF, yading@10: BFF, yading@10: PROGRSSIVE, yading@10: UNDETERMINED, yading@10: } Type; yading@10: yading@10: typedef struct { yading@10: const AVClass *class; yading@10: float interlace_threshold; yading@10: float progressive_threshold; yading@10: yading@10: Type last_type; yading@10: int prestat[4]; yading@10: int poststat[4]; yading@10: yading@10: uint8_t history[HIST_SIZE]; yading@10: yading@10: AVFrame *cur; yading@10: AVFrame *next; yading@10: AVFrame *prev; yading@10: int (*filter_line)(const uint8_t *prev, const uint8_t *cur, const uint8_t *next, int w); yading@10: yading@10: const AVPixFmtDescriptor *csp; yading@10: } IDETContext; yading@10: yading@10: #define OFFSET(x) offsetof(IDETContext, x) yading@10: #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM yading@10: yading@10: static const AVOption idet_options[] = { yading@10: { "intl_thres", "set interlacing threshold", OFFSET(interlace_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.04}, -1, FLT_MAX, FLAGS }, yading@10: { "prog_thres", "set progressive threshold", OFFSET(progressive_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.5}, -1, FLT_MAX, FLAGS }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFILTER_DEFINE_CLASS(idet); yading@10: yading@10: static const char *type2str(Type type) yading@10: { yading@10: switch(type) { yading@10: case TFF : return "Top Field First "; yading@10: case BFF : return "Bottom Field First"; yading@10: case PROGRSSIVE : return "Progressive "; yading@10: case UNDETERMINED: return "Undetermined "; yading@10: } yading@10: return NULL; yading@10: } yading@10: yading@10: static int filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w) yading@10: { yading@10: int x; yading@10: int ret=0; yading@10: yading@10: for(x=0; xpriv; yading@10: int y, i; yading@10: int64_t alpha[2]={0}; yading@10: int64_t delta=0; yading@10: Type type, best_type; yading@10: int match = 0; yading@10: yading@10: for (i = 0; i < idet->csp->nb_components; i++) { yading@10: int w = idet->cur->width; yading@10: int h = idet->cur->height; yading@10: int refs = idet->cur->linesize[i]; yading@10: yading@10: if (i && i<3) { yading@10: w >>= idet->csp->log2_chroma_w; yading@10: h >>= idet->csp->log2_chroma_h; yading@10: } yading@10: yading@10: for (y = 2; y < h - 2; y++) { yading@10: uint8_t *prev = &idet->prev->data[i][y*refs]; yading@10: uint8_t *cur = &idet->cur ->data[i][y*refs]; yading@10: uint8_t *next = &idet->next->data[i][y*refs]; yading@10: alpha[ y &1] += idet->filter_line(cur-refs, prev, cur+refs, w); yading@10: alpha[(y^1)&1] += idet->filter_line(cur-refs, next, cur+refs, w); yading@10: delta += idet->filter_line(cur-refs, cur, cur+refs, w); yading@10: } yading@10: } yading@10: yading@10: if (alpha[0] > idet->interlace_threshold * alpha[1]){ yading@10: type = TFF; yading@10: }else if(alpha[1] > idet->interlace_threshold * alpha[0]){ yading@10: type = BFF; yading@10: }else if(alpha[1] > idet->progressive_threshold * delta){ yading@10: type = PROGRSSIVE; yading@10: }else{ yading@10: type = UNDETERMINED; yading@10: } yading@10: yading@10: memmove(idet->history+1, idet->history, HIST_SIZE-1); yading@10: idet->history[0] = type; yading@10: best_type = UNDETERMINED; yading@10: for(i=0; ihistory[i] != UNDETERMINED){ yading@10: if(best_type == UNDETERMINED) yading@10: best_type = idet->history[i]; yading@10: yading@10: if(idet->history[i] == best_type) { yading@10: match++; yading@10: }else{ yading@10: match=0; yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: if(idet->last_type == UNDETERMINED){ yading@10: if(match ) idet->last_type = best_type; yading@10: }else{ yading@10: if(match>2) idet->last_type = best_type; yading@10: } yading@10: yading@10: if (idet->last_type == TFF){ yading@10: idet->cur->top_field_first = 1; yading@10: idet->cur->interlaced_frame = 1; yading@10: }else if(idet->last_type == BFF){ yading@10: idet->cur->top_field_first = 0; yading@10: idet->cur->interlaced_frame = 1; yading@10: }else if(idet->last_type == PROGRSSIVE){ yading@10: idet->cur->interlaced_frame = 0; yading@10: } yading@10: yading@10: idet->prestat [ type] ++; yading@10: idet->poststat[idet->last_type] ++; yading@10: av_log(ctx, AV_LOG_DEBUG, "Single frame:%s, Multi frame:%s\n", type2str(type), type2str(idet->last_type)); yading@10: } yading@10: yading@10: static int filter_frame(AVFilterLink *link, AVFrame *picref) yading@10: { yading@10: AVFilterContext *ctx = link->dst; yading@10: IDETContext *idet = ctx->priv; yading@10: yading@10: if (idet->prev) yading@10: av_frame_free(&idet->prev); yading@10: idet->prev = idet->cur; yading@10: idet->cur = idet->next; yading@10: idet->next = picref; yading@10: yading@10: if (!idet->cur) yading@10: return 0; yading@10: yading@10: if (!idet->prev) yading@10: idet->prev = av_frame_clone(idet->cur); yading@10: yading@10: if (!idet->csp) yading@10: idet->csp = av_pix_fmt_desc_get(link->format); yading@10: if (idet->csp->comp[0].depth_minus1 / 8 == 1) yading@10: idet->filter_line = (void*)filter_line_c_16bit; yading@10: yading@10: filter(ctx); yading@10: yading@10: return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur)); yading@10: } yading@10: yading@10: static int request_frame(AVFilterLink *link) yading@10: { yading@10: AVFilterContext *ctx = link->src; yading@10: IDETContext *idet = ctx->priv; yading@10: yading@10: do { yading@10: int ret; yading@10: yading@10: if ((ret = ff_request_frame(link->src->inputs[0]))) yading@10: return ret; yading@10: } while (!idet->cur); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold void uninit(AVFilterContext *ctx) yading@10: { yading@10: IDETContext *idet = ctx->priv; yading@10: yading@10: av_log(ctx, AV_LOG_INFO, "Single frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", yading@10: idet->prestat[TFF], yading@10: idet->prestat[BFF], yading@10: idet->prestat[PROGRSSIVE], yading@10: idet->prestat[UNDETERMINED] yading@10: ); yading@10: av_log(ctx, AV_LOG_INFO, "Multi frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", yading@10: idet->poststat[TFF], yading@10: idet->poststat[BFF], yading@10: idet->poststat[PROGRSSIVE], yading@10: idet->poststat[UNDETERMINED] yading@10: ); yading@10: yading@10: av_frame_free(&idet->prev); yading@10: av_frame_free(&idet->cur ); yading@10: av_frame_free(&idet->next); yading@10: } yading@10: yading@10: static int query_formats(AVFilterContext *ctx) yading@10: { yading@10: static const enum AVPixelFormat pix_fmts[] = { yading@10: AV_PIX_FMT_YUV420P, yading@10: AV_PIX_FMT_YUV422P, yading@10: AV_PIX_FMT_YUV444P, yading@10: AV_PIX_FMT_YUV410P, yading@10: AV_PIX_FMT_YUV411P, yading@10: AV_PIX_FMT_GRAY8, yading@10: AV_PIX_FMT_YUVJ420P, yading@10: AV_PIX_FMT_YUVJ422P, yading@10: AV_PIX_FMT_YUVJ444P, yading@10: AV_NE( AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE ), yading@10: AV_PIX_FMT_YUV440P, yading@10: AV_PIX_FMT_YUVJ440P, yading@10: AV_NE( AV_PIX_FMT_YUV420P10BE, AV_PIX_FMT_YUV420P10LE ), yading@10: AV_NE( AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUV422P10LE ), yading@10: AV_NE( AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUV444P10LE ), yading@10: AV_NE( AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUV420P16LE ), yading@10: AV_NE( AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUV422P16LE ), yading@10: AV_NE( AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUV444P16LE ), yading@10: AV_PIX_FMT_YUVA420P, yading@10: AV_PIX_FMT_NONE yading@10: }; yading@10: yading@10: ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int init(AVFilterContext *ctx) yading@10: { yading@10: IDETContext *idet = ctx->priv; yading@10: yading@10: idet->last_type = UNDETERMINED; yading@10: memset(idet->history, UNDETERMINED, HIST_SIZE); yading@10: yading@10: idet->filter_line = filter_line_c; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: static const AVFilterPad idet_inputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .filter_frame = filter_frame, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: static const AVFilterPad idet_outputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .request_frame = request_frame, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFilter avfilter_vf_idet = { yading@10: .name = "idet", yading@10: .description = NULL_IF_CONFIG_SMALL("Interlace detect Filter."), yading@10: yading@10: .priv_size = sizeof(IDETContext), yading@10: .init = init, yading@10: .uninit = uninit, yading@10: .query_formats = query_formats, yading@10: .inputs = idet_inputs, yading@10: .outputs = idet_outputs, yading@10: .priv_class = &idet_class, yading@10: };