| /* |
| * Copyright (c) 2018 Paul B Mahol |
| * |
| * 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 |
| */ |
| |
| /* |
| * Based on paper: A Simple and Efficient Deblocking Algorithm for Low Bit-Rate Video Coding. |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| enum FilterType { WEAK, STRONG, NB_FILTER }; |
| |
| typedef struct DeblockContext { |
| const AVClass *class; |
| const AVPixFmtDescriptor *desc; |
| int filter; |
| int block; |
| int planes; |
| float alpha; |
| float beta; |
| float gamma; |
| float delta; |
| |
| int ath; |
| int bth; |
| int gth; |
| int dth; |
| int max; |
| int depth; |
| int bpc; |
| int nb_planes; |
| int planewidth[4]; |
| int planeheight[4]; |
| |
| void (*deblockh)(uint8_t *dst, ptrdiff_t dst_linesize, int block, |
| int ath, int bth, int gth, int dth, int max); |
| void (*deblockv)(uint8_t *dst, ptrdiff_t dst_linesize, int block, |
| int ath, int bth, int gth, int dth, int max); |
| } DeblockContext; |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pixel_fmts[] = { |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| 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_YUV440P12, |
| 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_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
| 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_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_NONE |
| }; |
| AVFilterFormats *formats = ff_make_format_list(pixel_fmts); |
| if (!formats) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, formats); |
| } |
| |
| #define WEAK_HFILTER(name, type, ldiv) \ |
| static void deblockh##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \ |
| int ath, int bth, int gth, int dth, int max) \ |
| { \ |
| type *dst; \ |
| int x; \ |
| \ |
| dst = (type *)dstp; \ |
| dst_linesize /= ldiv; \ |
| \ |
| for (x = 0; x < block; x++) { \ |
| int delta = dst[x] - dst[x - dst_linesize]; \ |
| int A, B, C, D, a, b, c, d; \ |
| \ |
| if (FFABS(delta) >= ath || \ |
| FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \ |
| FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= gth) \ |
| continue; \ |
| \ |
| A = dst[x - 2 * dst_linesize]; \ |
| B = dst[x - 1 * dst_linesize]; \ |
| C = dst[x + 0 * dst_linesize]; \ |
| D = dst[x + 1 * dst_linesize]; \ |
| \ |
| a = A + delta / 8; \ |
| b = B + delta / 2; \ |
| c = C - delta / 2; \ |
| d = D - delta / 8; \ |
| \ |
| dst[x - 2 * dst_linesize] = av_clip(a, 0, max); \ |
| dst[x - 1 * dst_linesize] = av_clip(b, 0, max); \ |
| dst[x + 0 * dst_linesize] = av_clip(c, 0, max); \ |
| dst[x + 1 * dst_linesize] = av_clip(d, 0, max); \ |
| } \ |
| } |
| |
| WEAK_HFILTER(8, uint8_t, 1) |
| WEAK_HFILTER(16, uint16_t, 2) |
| |
| #define WEAK_VFILTER(name, type, ldiv) \ |
| static void deblockv##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \ |
| int ath, int bth, int gth, int dth, int max) \ |
| { \ |
| type *dst; \ |
| int y; \ |
| \ |
| dst = (type *)dstp; \ |
| dst_linesize /= ldiv; \ |
| \ |
| for (y = 0; y < block; y++) { \ |
| int delta = dst[0] - dst[-1]; \ |
| int A, B, C, D, a, b, c, d; \ |
| \ |
| if (FFABS(delta) >= ath || \ |
| FFABS(dst[-1] - dst[-2]) >= bth || \ |
| FFABS(dst[0] - dst[1]) >= gth) \ |
| continue; \ |
| \ |
| A = dst[-2]; \ |
| B = dst[-1]; \ |
| C = dst[+0]; \ |
| D = dst[+1]; \ |
| \ |
| a = A + delta / 8; \ |
| b = B + delta / 2; \ |
| c = C - delta / 2; \ |
| d = D - delta / 8; \ |
| \ |
| dst[-2] = av_clip(a, 0, max); \ |
| dst[-1] = av_clip(b, 0, max); \ |
| dst[+0] = av_clip(c, 0, max); \ |
| dst[+1] = av_clip(d, 0, max); \ |
| \ |
| dst += dst_linesize; \ |
| } \ |
| } |
| |
| WEAK_VFILTER(8, uint8_t, 1) |
| WEAK_VFILTER(16, uint16_t, 2) |
| |
| #define STRONG_HFILTER(name, type, ldiv) \ |
| static void deblockh##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\ |
| int ath, int bth, int gth, int dth, int max) \ |
| { \ |
| type *dst; \ |
| int x; \ |
| \ |
| dst = (type *)dstp; \ |
| dst_linesize /= ldiv; \ |
| \ |
| for (x = 0; x < block; x++) { \ |
| int A, B, C, D, E, F, a, b, c, d, e, f; \ |
| int delta = dst[x] - dst[x - dst_linesize]; \ |
| \ |
| if (FFABS(delta) >= ath || \ |
| FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \ |
| FFABS(dst[x + 1 * dst_linesize] - dst[x + 2 * dst_linesize]) >= gth || \ |
| FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= dth) \ |
| continue; \ |
| \ |
| A = dst[x - 3 * dst_linesize]; \ |
| B = dst[x - 2 * dst_linesize]; \ |
| C = dst[x - 1 * dst_linesize]; \ |
| D = dst[x + 0 * dst_linesize]; \ |
| E = dst[x + 1 * dst_linesize]; \ |
| F = dst[x + 2 * dst_linesize]; \ |
| \ |
| a = A + delta / 8; \ |
| b = B + delta / 4; \ |
| c = C + delta / 2; \ |
| d = D - delta / 2; \ |
| e = E - delta / 4; \ |
| f = F - delta / 8; \ |
| \ |
| dst[x - 3 * dst_linesize] = av_clip(a, 0, max); \ |
| dst[x - 2 * dst_linesize] = av_clip(b, 0, max); \ |
| dst[x - 1 * dst_linesize] = av_clip(c, 0, max); \ |
| dst[x + 0 * dst_linesize] = av_clip(d, 0, max); \ |
| dst[x + 1 * dst_linesize] = av_clip(e, 0, max); \ |
| dst[x + 2 * dst_linesize] = av_clip(f, 0, max); \ |
| } \ |
| } |
| |
| STRONG_HFILTER(8, uint8_t, 1) |
| STRONG_HFILTER(16, uint16_t, 2) |
| |
| #define STRONG_VFILTER(name, type, ldiv) \ |
| static void deblockv##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\ |
| int ath, int bth, int gth, int dth, int max) \ |
| { \ |
| type *dst; \ |
| int y; \ |
| \ |
| dst = (type *)dstp; \ |
| dst_linesize /= ldiv; \ |
| \ |
| for (y = 0; y < block; y++) { \ |
| int A, B, C, D, E, F, a, b, c, d, e, f; \ |
| int delta = dst[0] - dst[-1]; \ |
| \ |
| if (FFABS(delta) >= ath || \ |
| FFABS(dst[-1] - dst[-2]) >= bth || \ |
| FFABS(dst[+1] - dst[+2]) >= gth || \ |
| FFABS(dst[+0] - dst[+1]) >= dth) \ |
| continue; \ |
| \ |
| A = dst[-3]; \ |
| B = dst[-2]; \ |
| C = dst[-1]; \ |
| D = dst[+0]; \ |
| E = dst[+1]; \ |
| F = dst[+2]; \ |
| \ |
| a = A + delta / 8; \ |
| b = B + delta / 4; \ |
| c = C + delta / 2; \ |
| d = D - delta / 2; \ |
| e = E - delta / 4; \ |
| f = F - delta / 8; \ |
| \ |
| dst[-3] = av_clip(a, 0, max); \ |
| dst[-2] = av_clip(b, 0, max); \ |
| dst[-1] = av_clip(c, 0, max); \ |
| dst[+0] = av_clip(d, 0, max); \ |
| dst[+1] = av_clip(e, 0, max); \ |
| dst[+2] = av_clip(f, 0, max); \ |
| \ |
| dst += dst_linesize; \ |
| } \ |
| } |
| |
| STRONG_VFILTER(8, uint8_t, 1) |
| STRONG_VFILTER(16, uint16_t, 2) |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| DeblockContext *s = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| |
| s->desc = av_pix_fmt_desc_get(outlink->format); |
| if (!s->desc) |
| return AVERROR_BUG; |
| s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
| s->depth = s->desc->comp[0].depth; |
| s->bpc = (s->depth + 7) / 8; |
| s->max = (1 << s->depth) - 1; |
| s->ath = s->alpha * s->max; |
| s->bth = s->beta * s->max; |
| s->gth = s->gamma * s->max; |
| s->dth = s->delta * s->max; |
| |
| if (s->depth <= 8 && s->filter == WEAK) { |
| s->deblockh = deblockh8_weak; |
| s->deblockv = deblockv8_weak; |
| } else if (s->depth >= 8 && s->filter == WEAK) { |
| s->deblockh = deblockh16_weak; |
| s->deblockv = deblockv16_weak; |
| } |
| if (s->depth <= 8 && s->filter == STRONG) { |
| s->deblockh = deblockh8_strong; |
| s->deblockv = deblockv8_strong; |
| } else if (s->depth >= 8 && s->filter == STRONG) { |
| s->deblockh = deblockh16_strong; |
| s->deblockv = deblockv16_strong; |
| } |
| |
| s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w); |
| s->planewidth[0] = s->planewidth[3] = inlink->w; |
| |
| s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); |
| s->planeheight[0] = s->planeheight[3] = inlink->h; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| DeblockContext *s = ctx->priv; |
| const int block = s->block; |
| AVFrame *out; |
| int plane, x, y; |
| |
| if (av_frame_is_writable(in)) { |
| out = in; |
| } else { |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| } |
| |
| for (plane = 0; plane < s->nb_planes; plane++) { |
| const int width = s->planewidth[plane]; |
| const int height = s->planeheight[plane]; |
| const uint8_t *src = (const uint8_t *)in->data[plane]; |
| uint8_t *dst = (uint8_t *)out->data[plane]; |
| |
| if (in != out) |
| av_image_copy_plane(dst, out->linesize[plane], |
| src, in->linesize[plane], |
| width * s->bpc, height); |
| |
| if (!((1 << plane) & s->planes)) |
| continue; |
| |
| for (x = block; x < width; x += block) |
| s->deblockv(dst + x * s->bpc, out->linesize[plane], |
| FFMIN(block, height), s->ath, s->bth, s->gth, s->dth, s->max); |
| |
| for (y = block; y < height; y += block) { |
| dst += out->linesize[plane] * block; |
| |
| s->deblockh(dst, out->linesize[plane], |
| FFMIN(block, width), |
| s->ath, s->bth, s->gth, s->dth, s->max); |
| |
| for (x = block; x < width; x += block) { |
| s->deblockh(dst + x * s->bpc, out->linesize[plane], |
| FFMIN(block, width - x), |
| s->ath, s->bth, s->gth, s->dth, s->max); |
| s->deblockv(dst + x * s->bpc, out->linesize[plane], |
| FFMIN(block, height - y), |
| s->ath, s->bth, s->gth, s->dth, s->max); |
| } |
| } |
| } |
| |
| if (in != out) |
| av_frame_free(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| #define OFFSET(x) offsetof(DeblockContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
| |
| static const AVOption deblock_options[] = { |
| { "filter", "set type of filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=STRONG},0, 1, FLAGS, "filter" }, |
| { "weak", 0, 0, AV_OPT_TYPE_CONST, {.i64=WEAK}, 0, 0, FLAGS, "filter" }, |
| { "strong", 0, 0, AV_OPT_TYPE_CONST, {.i64=STRONG},0, 0, FLAGS, "filter" }, |
| { "block", "set size of block", OFFSET(block), AV_OPT_TYPE_INT, {.i64=8}, 4, 512, FLAGS }, |
| { "alpha", "set 1st detection threshold", OFFSET(alpha), AV_OPT_TYPE_FLOAT, {.dbl=.098}, 0, 1, FLAGS }, |
| { "beta", "set 2nd detection threshold", OFFSET(beta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS }, |
| { "gamma", "set 3rd detection threshold", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS }, |
| { "delta", "set 4th detection threshold", OFFSET(delta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS }, |
| { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS }, |
| { NULL }, |
| }; |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(deblock); |
| |
| AVFilter ff_vf_deblock = { |
| .name = "deblock", |
| .description = NULL_IF_CONFIG_SMALL("Deblock video."), |
| .priv_size = sizeof(DeblockContext), |
| .priv_class = &deblock_class, |
| .query_formats = query_formats, |
| .inputs = inputs, |
| .outputs = outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |
