| 1 | /* |
| 2 | * Copyright (C) 2012 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <float.h> /* FLT_MAX */ |
| 22 | |
| 23 | #include "libavutil/cpu.h" |
| 24 | #include "libavutil/common.h" |
| 25 | #include "libavutil/opt.h" |
| 26 | #include "internal.h" |
| 27 | #include "vf_idet.h" |
| 28 | |
| 29 | #define OFFSET(x) offsetof(IDETContext, x) |
| 30 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| 31 | |
| 32 | static const AVOption idet_options[] = { |
| 33 | { "intl_thres", "set interlacing threshold", OFFSET(interlace_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.04}, -1, FLT_MAX, FLAGS }, |
| 34 | { "prog_thres", "set progressive threshold", OFFSET(progressive_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.5}, -1, FLT_MAX, FLAGS }, |
| 35 | { NULL } |
| 36 | }; |
| 37 | |
| 38 | AVFILTER_DEFINE_CLASS(idet); |
| 39 | |
| 40 | static const char *type2str(Type type) |
| 41 | { |
| 42 | switch(type) { |
| 43 | case TFF : return "Top Field First "; |
| 44 | case BFF : return "Bottom Field First"; |
| 45 | case PROGRSSIVE : return "Progressive "; |
| 46 | case UNDETERMINED: return "Undetermined "; |
| 47 | } |
| 48 | return NULL; |
| 49 | } |
| 50 | |
| 51 | int ff_idet_filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w) |
| 52 | { |
| 53 | int x; |
| 54 | int ret=0; |
| 55 | |
| 56 | for(x=0; x<w; x++){ |
| 57 | int v = (*a++ + *c++) - 2 * *b++; |
| 58 | ret += FFABS(v); |
| 59 | } |
| 60 | |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | int ff_idet_filter_line_c_16bit(const uint16_t *a, const uint16_t *b, const uint16_t *c, int w) |
| 65 | { |
| 66 | int x; |
| 67 | int ret=0; |
| 68 | |
| 69 | for(x=0; x<w; x++){ |
| 70 | int v = (*a++ + *c++) - 2 * *b++; |
| 71 | ret += FFABS(v); |
| 72 | } |
| 73 | |
| 74 | return ret; |
| 75 | } |
| 76 | |
| 77 | static void filter(AVFilterContext *ctx) |
| 78 | { |
| 79 | IDETContext *idet = ctx->priv; |
| 80 | int y, i; |
| 81 | int64_t alpha[2]={0}; |
| 82 | int64_t delta=0; |
| 83 | Type type, best_type; |
| 84 | int match = 0; |
| 85 | |
| 86 | for (i = 0; i < idet->csp->nb_components; i++) { |
| 87 | int w = idet->cur->width; |
| 88 | int h = idet->cur->height; |
| 89 | int refs = idet->cur->linesize[i]; |
| 90 | |
| 91 | if (i && i<3) { |
| 92 | w = FF_CEIL_RSHIFT(w, idet->csp->log2_chroma_w); |
| 93 | h = FF_CEIL_RSHIFT(h, idet->csp->log2_chroma_h); |
| 94 | } |
| 95 | |
| 96 | for (y = 2; y < h - 2; y++) { |
| 97 | uint8_t *prev = &idet->prev->data[i][y*refs]; |
| 98 | uint8_t *cur = &idet->cur ->data[i][y*refs]; |
| 99 | uint8_t *next = &idet->next->data[i][y*refs]; |
| 100 | alpha[ y &1] += idet->filter_line(cur-refs, prev, cur+refs, w); |
| 101 | alpha[(y^1)&1] += idet->filter_line(cur-refs, next, cur+refs, w); |
| 102 | delta += idet->filter_line(cur-refs, cur, cur+refs, w); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if (alpha[0] > idet->interlace_threshold * alpha[1]){ |
| 107 | type = TFF; |
| 108 | }else if(alpha[1] > idet->interlace_threshold * alpha[0]){ |
| 109 | type = BFF; |
| 110 | }else if(alpha[1] > idet->progressive_threshold * delta){ |
| 111 | type = PROGRSSIVE; |
| 112 | }else{ |
| 113 | type = UNDETERMINED; |
| 114 | } |
| 115 | |
| 116 | memmove(idet->history+1, idet->history, HIST_SIZE-1); |
| 117 | idet->history[0] = type; |
| 118 | best_type = UNDETERMINED; |
| 119 | for(i=0; i<HIST_SIZE; i++){ |
| 120 | if(idet->history[i] != UNDETERMINED){ |
| 121 | if(best_type == UNDETERMINED) |
| 122 | best_type = idet->history[i]; |
| 123 | |
| 124 | if(idet->history[i] == best_type) { |
| 125 | match++; |
| 126 | }else{ |
| 127 | match=0; |
| 128 | break; |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | if(idet->last_type == UNDETERMINED){ |
| 133 | if(match ) idet->last_type = best_type; |
| 134 | }else{ |
| 135 | if(match>2) idet->last_type = best_type; |
| 136 | } |
| 137 | |
| 138 | if (idet->last_type == TFF){ |
| 139 | idet->cur->top_field_first = 1; |
| 140 | idet->cur->interlaced_frame = 1; |
| 141 | }else if(idet->last_type == BFF){ |
| 142 | idet->cur->top_field_first = 0; |
| 143 | idet->cur->interlaced_frame = 1; |
| 144 | }else if(idet->last_type == PROGRSSIVE){ |
| 145 | idet->cur->interlaced_frame = 0; |
| 146 | } |
| 147 | |
| 148 | idet->prestat [ type] ++; |
| 149 | idet->poststat[idet->last_type] ++; |
| 150 | av_log(ctx, AV_LOG_DEBUG, "Single frame:%s, Multi frame:%s\n", type2str(type), type2str(idet->last_type)); |
| 151 | } |
| 152 | |
| 153 | static int filter_frame(AVFilterLink *link, AVFrame *picref) |
| 154 | { |
| 155 | AVFilterContext *ctx = link->dst; |
| 156 | IDETContext *idet = ctx->priv; |
| 157 | |
| 158 | if (idet->prev) |
| 159 | av_frame_free(&idet->prev); |
| 160 | idet->prev = idet->cur; |
| 161 | idet->cur = idet->next; |
| 162 | idet->next = picref; |
| 163 | |
| 164 | if (!idet->cur) |
| 165 | return 0; |
| 166 | |
| 167 | if (!idet->prev) |
| 168 | idet->prev = av_frame_clone(idet->cur); |
| 169 | |
| 170 | if (!idet->csp) |
| 171 | idet->csp = av_pix_fmt_desc_get(link->format); |
| 172 | if (idet->csp->comp[0].depth_minus1 / 8 == 1){ |
| 173 | idet->filter_line = (ff_idet_filter_func)ff_idet_filter_line_c_16bit; |
| 174 | if (ARCH_X86) |
| 175 | ff_idet_init_x86(idet, 1); |
| 176 | } |
| 177 | |
| 178 | filter(ctx); |
| 179 | |
| 180 | return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur)); |
| 181 | } |
| 182 | |
| 183 | static av_cold void uninit(AVFilterContext *ctx) |
| 184 | { |
| 185 | IDETContext *idet = ctx->priv; |
| 186 | |
| 187 | av_log(ctx, AV_LOG_INFO, "Single frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", |
| 188 | idet->prestat[TFF], |
| 189 | idet->prestat[BFF], |
| 190 | idet->prestat[PROGRSSIVE], |
| 191 | idet->prestat[UNDETERMINED] |
| 192 | ); |
| 193 | av_log(ctx, AV_LOG_INFO, "Multi frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", |
| 194 | idet->poststat[TFF], |
| 195 | idet->poststat[BFF], |
| 196 | idet->poststat[PROGRSSIVE], |
| 197 | idet->poststat[UNDETERMINED] |
| 198 | ); |
| 199 | |
| 200 | av_frame_free(&idet->prev); |
| 201 | av_frame_free(&idet->cur ); |
| 202 | av_frame_free(&idet->next); |
| 203 | } |
| 204 | |
| 205 | static int query_formats(AVFilterContext *ctx) |
| 206 | { |
| 207 | static const enum AVPixelFormat pix_fmts[] = { |
| 208 | AV_PIX_FMT_YUV420P, |
| 209 | AV_PIX_FMT_YUV422P, |
| 210 | AV_PIX_FMT_YUV444P, |
| 211 | AV_PIX_FMT_YUV410P, |
| 212 | AV_PIX_FMT_YUV411P, |
| 213 | AV_PIX_FMT_GRAY8, |
| 214 | AV_PIX_FMT_YUVJ420P, |
| 215 | AV_PIX_FMT_YUVJ422P, |
| 216 | AV_PIX_FMT_YUVJ444P, |
| 217 | AV_PIX_FMT_GRAY16, |
| 218 | AV_PIX_FMT_YUV440P, |
| 219 | AV_PIX_FMT_YUVJ440P, |
| 220 | AV_PIX_FMT_YUV420P10, |
| 221 | AV_PIX_FMT_YUV422P10, |
| 222 | AV_PIX_FMT_YUV444P10, |
| 223 | AV_PIX_FMT_YUV420P16, |
| 224 | AV_PIX_FMT_YUV422P16, |
| 225 | AV_PIX_FMT_YUV444P16, |
| 226 | AV_PIX_FMT_YUVA420P, |
| 227 | AV_PIX_FMT_NONE |
| 228 | }; |
| 229 | |
| 230 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int config_output(AVFilterLink *outlink) |
| 236 | { |
| 237 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static av_cold int init(AVFilterContext *ctx) |
| 242 | { |
| 243 | IDETContext *idet = ctx->priv; |
| 244 | |
| 245 | idet->last_type = UNDETERMINED; |
| 246 | memset(idet->history, UNDETERMINED, HIST_SIZE); |
| 247 | |
| 248 | idet->filter_line = ff_idet_filter_line_c; |
| 249 | |
| 250 | if (ARCH_X86) |
| 251 | ff_idet_init_x86(idet, 0); |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | static const AVFilterPad idet_inputs[] = { |
| 258 | { |
| 259 | .name = "default", |
| 260 | .type = AVMEDIA_TYPE_VIDEO, |
| 261 | .filter_frame = filter_frame, |
| 262 | }, |
| 263 | { NULL } |
| 264 | }; |
| 265 | |
| 266 | static const AVFilterPad idet_outputs[] = { |
| 267 | { |
| 268 | .name = "default", |
| 269 | .type = AVMEDIA_TYPE_VIDEO, |
| 270 | .config_props = config_output, |
| 271 | }, |
| 272 | { NULL } |
| 273 | }; |
| 274 | |
| 275 | AVFilter ff_vf_idet = { |
| 276 | .name = "idet", |
| 277 | .description = NULL_IF_CONFIG_SMALL("Interlace detect Filter."), |
| 278 | .priv_size = sizeof(IDETContext), |
| 279 | .init = init, |
| 280 | .uninit = uninit, |
| 281 | .query_formats = query_formats, |
| 282 | .inputs = idet_inputs, |
| 283 | .outputs = idet_outputs, |
| 284 | .priv_class = &idet_class, |
| 285 | }; |