| /* |
| * BobWeaver Deinterlacing Filter |
| * Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de> |
| * |
| * Based on YADIF (Yet Another Deinterlacing Filter) |
| * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at> |
| * 2010 James Darnley <james.darnley@gmail.com> |
| * |
| * With use of Weston 3 Field Deinterlacing Filter algorithm |
| * Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved |
| * Author of de-interlace algorithm: Jim Easterbrook for BBC R&D |
| * Based on the process described by Martin Weston for BBC R&D |
| * |
| * 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 "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/imgutils.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| #include "bwdif.h" |
| |
| /* |
| * Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer). |
| * Used when there is spatial and temporal interpolation. |
| * Filter coefficients coef_sp are used when there is spatial interpolation only. |
| * Adjusted for matching visual sharpness impression of spatial and temporal interpolation. |
| */ |
| static const uint16_t coef_lf[2] = { 4309, 213 }; |
| static const uint16_t coef_hf[3] = { 5570, 3801, 1016 }; |
| static const uint16_t coef_sp[2] = { 5077, 981 }; |
| |
| typedef struct ThreadData { |
| AVFrame *frame; |
| int plane; |
| int w, h; |
| int parity; |
| int tff; |
| } ThreadData; |
| |
| #define FILTER_INTRA() \ |
| for (x = 0; x < w; x++) { \ |
| interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
| dst[0] = av_clip(interpol, 0, clip_max); \ |
| \ |
| dst++; \ |
| cur++; \ |
| } |
| |
| #define FILTER1() \ |
| for (x = 0; x < w; x++) { \ |
| int c = cur[mrefs]; \ |
| int d = (prev2[0] + next2[0]) >> 1; \ |
| int e = cur[prefs]; \ |
| int temporal_diff0 = FFABS(prev2[0] - next2[0]); \ |
| int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \ |
| int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \ |
| int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \ |
| \ |
| if (!diff) { \ |
| dst[0] = d; \ |
| } else { |
| |
| #define SPAT_CHECK() \ |
| int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \ |
| int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \ |
| int dc = d - c; \ |
| int de = d - e; \ |
| int max = FFMAX3(de, dc, FFMIN(b, f)); \ |
| int min = FFMIN3(de, dc, FFMAX(b, f)); \ |
| diff = FFMAX3(diff, min, -max); |
| |
| #define FILTER_LINE() \ |
| SPAT_CHECK() \ |
| if (FFABS(c - e) > temporal_diff0) { \ |
| interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \ |
| - coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \ |
| + coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \ |
| + coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
| } else { \ |
| interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
| } |
| |
| #define FILTER_EDGE() \ |
| if (spat) { \ |
| SPAT_CHECK() \ |
| } \ |
| interpol = (c + e) >> 1; |
| |
| #define FILTER2() \ |
| if (interpol > d + diff) \ |
| interpol = d + diff; \ |
| else if (interpol < d - diff) \ |
| interpol = d - diff; \ |
| \ |
| dst[0] = av_clip(interpol, 0, clip_max); \ |
| } \ |
| \ |
| dst++; \ |
| cur++; \ |
| prev++; \ |
| next++; \ |
| prev2++; \ |
| next2++; \ |
| } |
| |
| static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs, |
| int prefs3, int mrefs3, int parity, int clip_max) |
| { |
| uint8_t *dst = dst1; |
| uint8_t *cur = cur1; |
| int interpol, x; |
| |
| FILTER_INTRA() |
| } |
| |
| static void filter_line_c(void *dst1, void *prev1, void *cur1, void *next1, |
| int w, int prefs, int mrefs, int prefs2, int mrefs2, |
| int prefs3, int mrefs3, int prefs4, int mrefs4, |
| int parity, int clip_max) |
| { |
| uint8_t *dst = dst1; |
| uint8_t *prev = prev1; |
| uint8_t *cur = cur1; |
| uint8_t *next = next1; |
| uint8_t *prev2 = parity ? prev : cur ; |
| uint8_t *next2 = parity ? cur : next; |
| int interpol, x; |
| |
| FILTER1() |
| FILTER_LINE() |
| FILTER2() |
| } |
| |
| static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1, |
| int w, int prefs, int mrefs, int prefs2, int mrefs2, |
| int parity, int clip_max, int spat) |
| { |
| uint8_t *dst = dst1; |
| uint8_t *prev = prev1; |
| uint8_t *cur = cur1; |
| uint8_t *next = next1; |
| uint8_t *prev2 = parity ? prev : cur ; |
| uint8_t *next2 = parity ? cur : next; |
| int interpol, x; |
| |
| FILTER1() |
| FILTER_EDGE() |
| FILTER2() |
| } |
| |
| static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs, |
| int prefs3, int mrefs3, int parity, int clip_max) |
| { |
| uint16_t *dst = dst1; |
| uint16_t *cur = cur1; |
| int interpol, x; |
| |
| FILTER_INTRA() |
| } |
| |
| static void filter_line_c_16bit(void *dst1, void *prev1, void *cur1, void *next1, |
| int w, int prefs, int mrefs, int prefs2, int mrefs2, |
| int prefs3, int mrefs3, int prefs4, int mrefs4, |
| int parity, int clip_max) |
| { |
| uint16_t *dst = dst1; |
| uint16_t *prev = prev1; |
| uint16_t *cur = cur1; |
| uint16_t *next = next1; |
| uint16_t *prev2 = parity ? prev : cur ; |
| uint16_t *next2 = parity ? cur : next; |
| int interpol, x; |
| |
| FILTER1() |
| FILTER_LINE() |
| FILTER2() |
| } |
| |
| static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1, |
| int w, int prefs, int mrefs, int prefs2, int mrefs2, |
| int parity, int clip_max, int spat) |
| { |
| uint16_t *dst = dst1; |
| uint16_t *prev = prev1; |
| uint16_t *cur = cur1; |
| uint16_t *next = next1; |
| uint16_t *prev2 = parity ? prev : cur ; |
| uint16_t *next2 = parity ? cur : next; |
| int interpol, x; |
| |
| FILTER1() |
| FILTER_EDGE() |
| FILTER2() |
| } |
| |
| static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| BWDIFContext *s = ctx->priv; |
| YADIFContext *yadif = &s->yadif; |
| ThreadData *td = arg; |
| int linesize = yadif->cur->linesize[td->plane]; |
| int clip_max = (1 << (yadif->csp->comp[td->plane].depth)) - 1; |
| int df = (yadif->csp->comp[td->plane].depth + 7) / 8; |
| int refs = linesize / df; |
| int slice_start = (td->h * jobnr ) / nb_jobs; |
| int slice_end = (td->h * (jobnr+1)) / nb_jobs; |
| int y; |
| |
| for (y = slice_start; y < slice_end; y++) { |
| if ((y ^ td->parity) & 1) { |
| uint8_t *prev = &yadif->prev->data[td->plane][y * linesize]; |
| uint8_t *cur = &yadif->cur ->data[td->plane][y * linesize]; |
| uint8_t *next = &yadif->next->data[td->plane][y * linesize]; |
| uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]]; |
| if (yadif->current_field == YADIF_FIELD_END) { |
| s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs, |
| y > (df - 1) ? -refs : refs, |
| (y + 3*df) < td->h ? 3 * refs : -refs, |
| y > (3*df - 1) ? -3 * refs : refs, |
| td->parity ^ td->tff, clip_max); |
| } else if ((y < 4) || ((y + 5) > td->h)) { |
| s->filter_edge(dst, prev, cur, next, td->w, |
| (y + df) < td->h ? refs : -refs, |
| y > (df - 1) ? -refs : refs, |
| refs << 1, -(refs << 1), |
| td->parity ^ td->tff, clip_max, |
| (y < 2) || ((y + 3) > td->h) ? 0 : 1); |
| } else { |
| s->filter_line(dst, prev, cur, next, td->w, |
| refs, -refs, refs << 1, -(refs << 1), |
| 3 * refs, -3 * refs, refs << 2, -(refs << 2), |
| td->parity ^ td->tff, clip_max); |
| } |
| } else { |
| memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]], |
| &yadif->cur->data[td->plane][y * linesize], td->w * df); |
| } |
| } |
| return 0; |
| } |
| |
| static void filter(AVFilterContext *ctx, AVFrame *dstpic, |
| int parity, int tff) |
| { |
| BWDIFContext *bwdif = ctx->priv; |
| YADIFContext *yadif = &bwdif->yadif; |
| ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff }; |
| int i; |
| |
| for (i = 0; i < yadif->csp->nb_components; i++) { |
| int w = dstpic->width; |
| int h = dstpic->height; |
| |
| if (i == 1 || i == 2) { |
| w = AV_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w); |
| h = AV_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h); |
| } |
| |
| td.w = w; |
| td.h = h; |
| td.plane = i; |
| |
| ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ff_filter_get_nb_threads(ctx))); |
| } |
| if (yadif->current_field == YADIF_FIELD_END) { |
| yadif->current_field = YADIF_FIELD_NORMAL; |
| } |
| |
| emms_c(); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| BWDIFContext *bwdif = ctx->priv; |
| YADIFContext *yadif = &bwdif->yadif; |
| |
| av_frame_free(&yadif->prev); |
| av_frame_free(&yadif->cur ); |
| av_frame_free(&yadif->next); |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
| AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
| 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_YUVA422P, AV_PIX_FMT_YUVA444P, |
| AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_NONE |
| }; |
| |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| static int config_props(AVFilterLink *link) |
| { |
| AVFilterContext *ctx = link->src; |
| BWDIFContext *s = link->src->priv; |
| YADIFContext *yadif = &s->yadif; |
| |
| link->time_base.num = link->src->inputs[0]->time_base.num; |
| link->time_base.den = link->src->inputs[0]->time_base.den * 2; |
| link->w = link->src->inputs[0]->w; |
| link->h = link->src->inputs[0]->h; |
| |
| if(yadif->mode&1) |
| link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1}); |
| |
| if (link->w < 3 || link->h < 4) { |
| av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or 4 lines is not supported\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| yadif->csp = av_pix_fmt_desc_get(link->format); |
| yadif->filter = filter; |
| if (yadif->csp->comp[0].depth > 8) { |
| s->filter_intra = filter_intra_16bit; |
| s->filter_line = filter_line_c_16bit; |
| s->filter_edge = filter_edge_16bit; |
| } else { |
| s->filter_intra = filter_intra; |
| s->filter_line = filter_line_c; |
| s->filter_edge = filter_edge; |
| } |
| |
| if (ARCH_X86) |
| ff_bwdif_init_x86(s); |
| |
| return 0; |
| } |
| |
| |
| #define OFFSET(x) offsetof(YADIFContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| |
| #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit } |
| |
| static const AVOption bwdif_options[] = { |
| { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"}, |
| CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"), |
| CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"), |
| |
| { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" }, |
| CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"), |
| CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"), |
| CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"), |
| |
| { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" }, |
| CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"), |
| CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"), |
| |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(bwdif); |
| |
| static const AVFilterPad avfilter_vf_bwdif_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = ff_yadif_filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_bwdif_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .request_frame = ff_yadif_request_frame, |
| .config_props = config_props, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_bwdif = { |
| .name = "bwdif", |
| .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."), |
| .priv_size = sizeof(BWDIFContext), |
| .priv_class = &bwdif_class, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = avfilter_vf_bwdif_inputs, |
| .outputs = avfilter_vf_bwdif_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, |
| }; |
