| /* |
| * Copyright (c) 2012 Jeremy Tran |
| * Copyright (c) 2004 Tobias Diedrich |
| * Copyright (c) 2003 Donald A. Graft |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU 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. |
| */ |
| |
| /** |
| * @file |
| * Kernel Deinterlacer |
| * Ported from MPlayer libmpcodecs/vf_kerndeint.c. |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| |
| typedef struct KerndeintContext { |
| const AVClass *class; |
| int frame; ///< frame count, starting from 0 |
| int thresh, map, order, sharp, twoway; |
| int vsub; |
| int is_packed_rgb; |
| uint8_t *tmp_data [4]; ///< temporary plane data buffer |
| int tmp_linesize[4]; ///< temporary plane byte linesize |
| int tmp_bwidth [4]; ///< temporary plane byte width |
| } KerndeintContext; |
| |
| #define OFFSET(x) offsetof(KerndeintContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| static const AVOption kerndeint_options[] = { |
| { "thresh", "set the threshold", OFFSET(thresh), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS }, |
| { "map", "set the map", OFFSET(map), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
| { "order", "set the order", OFFSET(order), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
| { "sharp", "set sharpening", OFFSET(sharp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
| { "twoway", "set twoway", OFFSET(twoway), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(kerndeint); |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| KerndeintContext *kerndeint = ctx->priv; |
| |
| av_freep(&kerndeint->tmp_data[0]); |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUYV422, |
| AV_PIX_FMT_ARGB, AV_PIX_FMT_0RGB, |
| AV_PIX_FMT_ABGR, AV_PIX_FMT_0BGR, |
| AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0, |
| AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0, |
| 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 *inlink) |
| { |
| KerndeintContext *kerndeint = inlink->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| int ret; |
| |
| kerndeint->is_packed_rgb = av_pix_fmt_desc_get(inlink->format)->flags & AV_PIX_FMT_FLAG_RGB; |
| kerndeint->vsub = desc->log2_chroma_h; |
| |
| ret = av_image_alloc(kerndeint->tmp_data, kerndeint->tmp_linesize, |
| inlink->w, inlink->h, inlink->format, 16); |
| if (ret < 0) |
| return ret; |
| memset(kerndeint->tmp_data[0], 0, ret); |
| |
| if ((ret = av_image_fill_linesizes(kerndeint->tmp_bwidth, inlink->format, inlink->w)) < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *inpic) |
| { |
| KerndeintContext *kerndeint = inlink->dst->priv; |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| AVFrame *outpic; |
| const uint8_t *prvp; ///< Previous field's pixel line number n |
| const uint8_t *prvpp; ///< Previous field's pixel line number (n - 1) |
| const uint8_t *prvpn; ///< Previous field's pixel line number (n + 1) |
| const uint8_t *prvppp; ///< Previous field's pixel line number (n - 2) |
| const uint8_t *prvpnn; ///< Previous field's pixel line number (n + 2) |
| const uint8_t *prvp4p; ///< Previous field's pixel line number (n - 4) |
| const uint8_t *prvp4n; ///< Previous field's pixel line number (n + 4) |
| |
| const uint8_t *srcp; ///< Current field's pixel line number n |
| const uint8_t *srcpp; ///< Current field's pixel line number (n - 1) |
| const uint8_t *srcpn; ///< Current field's pixel line number (n + 1) |
| const uint8_t *srcppp; ///< Current field's pixel line number (n - 2) |
| const uint8_t *srcpnn; ///< Current field's pixel line number (n + 2) |
| const uint8_t *srcp3p; ///< Current field's pixel line number (n - 3) |
| const uint8_t *srcp3n; ///< Current field's pixel line number (n + 3) |
| const uint8_t *srcp4p; ///< Current field's pixel line number (n - 4) |
| const uint8_t *srcp4n; ///< Current field's pixel line number (n + 4) |
| |
| uint8_t *dstp, *dstp_saved; |
| const uint8_t *srcp_saved; |
| |
| int src_linesize, psrc_linesize, dst_linesize, bwidth; |
| int x, y, plane, val, hi, lo, g, h, n = kerndeint->frame++; |
| double valf; |
| |
| const int thresh = kerndeint->thresh; |
| const int order = kerndeint->order; |
| const int map = kerndeint->map; |
| const int sharp = kerndeint->sharp; |
| const int twoway = kerndeint->twoway; |
| |
| const int is_packed_rgb = kerndeint->is_packed_rgb; |
| |
| outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!outpic) { |
| av_frame_free(&inpic); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(outpic, inpic); |
| outpic->interlaced_frame = 0; |
| |
| for (plane = 0; plane < 4 && inpic->data[plane] && inpic->linesize[plane]; plane++) { |
| h = plane == 0 ? inlink->h : AV_CEIL_RSHIFT(inlink->h, kerndeint->vsub); |
| bwidth = kerndeint->tmp_bwidth[plane]; |
| |
| srcp_saved = inpic->data[plane]; |
| src_linesize = inpic->linesize[plane]; |
| psrc_linesize = kerndeint->tmp_linesize[plane]; |
| dstp_saved = outpic->data[plane]; |
| dst_linesize = outpic->linesize[plane]; |
| srcp = srcp_saved + (1 - order) * src_linesize; |
| dstp = dstp_saved + (1 - order) * dst_linesize; |
| |
| for (y = 0; y < h; y += 2) { |
| memcpy(dstp, srcp, bwidth); |
| srcp += 2 * src_linesize; |
| dstp += 2 * dst_linesize; |
| } |
| |
| // Copy through the lines that will be missed below. |
| memcpy(dstp_saved + order * dst_linesize, srcp_saved + (1 - order) * src_linesize, bwidth); |
| memcpy(dstp_saved + (2 + order ) * dst_linesize, srcp_saved + (3 - order) * src_linesize, bwidth); |
| memcpy(dstp_saved + (h - 2 + order) * dst_linesize, srcp_saved + (h - 1 - order) * src_linesize, bwidth); |
| memcpy(dstp_saved + (h - 4 + order) * dst_linesize, srcp_saved + (h - 3 - order) * src_linesize, bwidth); |
| |
| /* For the other field choose adaptively between using the previous field |
| or the interpolant from the current field. */ |
| prvp = kerndeint->tmp_data[plane] + 5 * psrc_linesize - (1 - order) * psrc_linesize; |
| prvpp = prvp - psrc_linesize; |
| prvppp = prvp - 2 * psrc_linesize; |
| prvp4p = prvp - 4 * psrc_linesize; |
| prvpn = prvp + psrc_linesize; |
| prvpnn = prvp + 2 * psrc_linesize; |
| prvp4n = prvp + 4 * psrc_linesize; |
| |
| srcp = srcp_saved + 5 * src_linesize - (1 - order) * src_linesize; |
| srcpp = srcp - src_linesize; |
| srcppp = srcp - 2 * src_linesize; |
| srcp3p = srcp - 3 * src_linesize; |
| srcp4p = srcp - 4 * src_linesize; |
| |
| srcpn = srcp + src_linesize; |
| srcpnn = srcp + 2 * src_linesize; |
| srcp3n = srcp + 3 * src_linesize; |
| srcp4n = srcp + 4 * src_linesize; |
| |
| dstp = dstp_saved + 5 * dst_linesize - (1 - order) * dst_linesize; |
| |
| for (y = 5 - (1 - order); y <= h - 5 - (1 - order); y += 2) { |
| for (x = 0; x < bwidth; x++) { |
| if (thresh == 0 || n == 0 || |
| (abs((int)prvp[x] - (int)srcp[x]) > thresh) || |
| (abs((int)prvpp[x] - (int)srcpp[x]) > thresh) || |
| (abs((int)prvpn[x] - (int)srcpn[x]) > thresh)) { |
| if (map) { |
| g = x & ~3; |
| |
| if (is_packed_rgb) { |
| AV_WB32(dstp + g, 0xffffffff); |
| x = g + 3; |
| } else if (inlink->format == AV_PIX_FMT_YUYV422) { |
| // y <- 235, u <- 128, y <- 235, v <- 128 |
| AV_WB32(dstp + g, 0xeb80eb80); |
| x = g + 3; |
| } else { |
| dstp[x] = plane == 0 ? 235 : 128; |
| } |
| } else { |
| if (is_packed_rgb) { |
| hi = 255; |
| lo = 0; |
| } else if (inlink->format == AV_PIX_FMT_YUYV422) { |
| hi = x & 1 ? 240 : 235; |
| lo = 16; |
| } else { |
| hi = plane == 0 ? 235 : 240; |
| lo = 16; |
| } |
| |
| if (sharp) { |
| if (twoway) { |
| valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x]) |
| + 0.170 * ((int)srcp[x] + (int)prvp[x]) |
| - 0.116 * ((int)srcppp[x] + (int)srcpnn[x] + (int)prvppp[x] + (int)prvpnn[x]) |
| - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x]) |
| + 0.031 * ((int)srcp4p[x] + (int)srcp4n[x] + (int)prvp4p[x] + (int)prvp4n[x]); |
| } else { |
| valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x]) |
| + 0.170 * ((int)prvp[x]) |
| - 0.116 * ((int)prvppp[x] + (int)prvpnn[x]) |
| - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x]) |
| + 0.031 * ((int)prvp4p[x] + (int)prvp4p[x]); |
| } |
| dstp[x] = av_clip(valf, lo, hi); |
| } else { |
| if (twoway) { |
| val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)srcp[x] + (int)prvp[x]) |
| - (int)(srcppp[x]) - (int)(srcpnn[x]) |
| - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4; |
| } else { |
| val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)prvp[x]) |
| - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4; |
| } |
| dstp[x] = av_clip(val, lo, hi); |
| } |
| } |
| } else { |
| dstp[x] = srcp[x]; |
| } |
| } |
| prvp += 2 * psrc_linesize; |
| prvpp += 2 * psrc_linesize; |
| prvppp += 2 * psrc_linesize; |
| prvpn += 2 * psrc_linesize; |
| prvpnn += 2 * psrc_linesize; |
| prvp4p += 2 * psrc_linesize; |
| prvp4n += 2 * psrc_linesize; |
| srcp += 2 * src_linesize; |
| srcpp += 2 * src_linesize; |
| srcppp += 2 * src_linesize; |
| srcp3p += 2 * src_linesize; |
| srcp4p += 2 * src_linesize; |
| srcpn += 2 * src_linesize; |
| srcpnn += 2 * src_linesize; |
| srcp3n += 2 * src_linesize; |
| srcp4n += 2 * src_linesize; |
| dstp += 2 * dst_linesize; |
| } |
| |
| srcp = inpic->data[plane]; |
| dstp = kerndeint->tmp_data[plane]; |
| av_image_copy_plane(dstp, psrc_linesize, srcp, src_linesize, bwidth, h); |
| } |
| |
| av_frame_free(&inpic); |
| return ff_filter_frame(outlink, outpic); |
| } |
| |
| static const AVFilterPad kerndeint_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_props, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad kerndeint_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| |
| AVFilter ff_vf_kerndeint = { |
| .name = "kerndeint", |
| .description = NULL_IF_CONFIG_SMALL("Apply kernel deinterlacing to the input."), |
| .priv_size = sizeof(KerndeintContext), |
| .priv_class = &kerndeint_class, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = kerndeint_inputs, |
| .outputs = kerndeint_outputs, |
| }; |
