yading@10: /* yading@10: * Copyright (c) 2002 Michael Niedermayer yading@10: * Copyright (c) 2012 Jeremy Tran yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or modify yading@10: * it under the terms of the GNU General Public License as published by yading@10: * the Free Software Foundation; either version 2 of the License, or yading@10: * (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 yading@10: * GNU General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU General Public License along yading@10: * with FFmpeg; if not, write to the Free Software Foundation, Inc., yading@10: * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * Apply a smartblur filter to the input video yading@10: * Ported from MPlayer libmpcodecs/vf_smartblur.c by Michael Niedermayer. yading@10: */ yading@10: yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/pixdesc.h" yading@10: #include "libswscale/swscale.h" yading@10: yading@10: #include "avfilter.h" yading@10: #include "formats.h" yading@10: #include "internal.h" yading@10: yading@10: #define RADIUS_MIN 0.1 yading@10: #define RADIUS_MAX 5.0 yading@10: yading@10: #define STRENGTH_MIN -1.0 yading@10: #define STRENGTH_MAX 1.0 yading@10: yading@10: #define THRESHOLD_MIN -30 yading@10: #define THRESHOLD_MAX 30 yading@10: yading@10: typedef struct { yading@10: float radius; yading@10: float strength; yading@10: int threshold; yading@10: float quality; yading@10: struct SwsContext *filter_context; yading@10: } FilterParam; yading@10: yading@10: typedef struct { yading@10: const AVClass *class; yading@10: FilterParam luma; yading@10: FilterParam chroma; yading@10: int hsub; yading@10: int vsub; yading@10: unsigned int sws_flags; yading@10: } SmartblurContext; yading@10: yading@10: #define OFFSET(x) offsetof(SmartblurContext, x) yading@10: #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM yading@10: yading@10: static const AVOption smartblur_options[] = { yading@10: { "luma_radius", "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS }, yading@10: { "lr" , "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS }, yading@10: { "luma_strength", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS }, yading@10: { "ls", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS }, yading@10: { "luma_threshold", "set luma threshold", OFFSET(luma.threshold), AV_OPT_TYPE_INT, {.i64=0}, THRESHOLD_MIN, THRESHOLD_MAX, .flags=FLAGS }, yading@10: { "lt", "set luma threshold", OFFSET(luma.threshold), AV_OPT_TYPE_INT, {.i64=0}, THRESHOLD_MIN, THRESHOLD_MAX, .flags=FLAGS }, yading@10: yading@10: { "chroma_radius", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS }, yading@10: { "cr", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS }, yading@10: { "chroma_strength", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS }, yading@10: { "cs", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS }, yading@10: { "chroma_threshold", "set chroma threshold", OFFSET(chroma.threshold), AV_OPT_TYPE_INT, {.i64=THRESHOLD_MIN-1}, THRESHOLD_MIN-1, THRESHOLD_MAX, .flags=FLAGS }, yading@10: { "ct", "set chroma threshold", OFFSET(chroma.threshold), AV_OPT_TYPE_INT, {.i64=THRESHOLD_MIN-1}, THRESHOLD_MIN-1, THRESHOLD_MAX, .flags=FLAGS }, yading@10: yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFILTER_DEFINE_CLASS(smartblur); yading@10: yading@10: static av_cold int init(AVFilterContext *ctx) yading@10: { yading@10: SmartblurContext *sblur = ctx->priv; yading@10: yading@10: /* make chroma default to luma values, if not explicitly set */ yading@10: if (sblur->chroma.radius < RADIUS_MIN) yading@10: sblur->chroma.radius = sblur->luma.radius; yading@10: if (sblur->chroma.strength < STRENGTH_MIN) yading@10: sblur->chroma.strength = sblur->luma.strength; yading@10: if (sblur->chroma.threshold < THRESHOLD_MIN) yading@10: sblur->chroma.threshold = sblur->luma.threshold; yading@10: yading@10: sblur->luma.quality = sblur->chroma.quality = 3.0; yading@10: sblur->sws_flags = SWS_BICUBIC; yading@10: yading@10: av_log(ctx, AV_LOG_VERBOSE, yading@10: "luma_radius:%f luma_strength:%f luma_threshold:%d " yading@10: "chroma_radius:%f chroma_strength:%f chroma_threshold:%d\n", yading@10: sblur->luma.radius, sblur->luma.strength, sblur->luma.threshold, yading@10: sblur->chroma.radius, sblur->chroma.strength, sblur->chroma.threshold); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold void uninit(AVFilterContext *ctx) yading@10: { yading@10: SmartblurContext *sblur = ctx->priv; yading@10: yading@10: sws_freeContext(sblur->luma.filter_context); yading@10: sws_freeContext(sblur->chroma.filter_context); 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_YUV444P, AV_PIX_FMT_YUV422P, yading@10: AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, yading@10: AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, yading@10: AV_PIX_FMT_GRAY8, 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 int alloc_sws_context(FilterParam *f, int width, int height, unsigned int flags) yading@10: { yading@10: SwsVector *vec; yading@10: SwsFilter sws_filter; yading@10: yading@10: vec = sws_getGaussianVec(f->radius, f->quality); yading@10: yading@10: if (!vec) yading@10: return AVERROR(EINVAL); yading@10: yading@10: sws_scaleVec(vec, f->strength); yading@10: vec->coeff[vec->length / 2] += 1.0 - f->strength; yading@10: sws_filter.lumH = sws_filter.lumV = vec; yading@10: sws_filter.chrH = sws_filter.chrV = NULL; yading@10: f->filter_context = sws_getCachedContext(NULL, yading@10: width, height, AV_PIX_FMT_GRAY8, yading@10: width, height, AV_PIX_FMT_GRAY8, yading@10: flags, &sws_filter, NULL, NULL); yading@10: yading@10: sws_freeVec(vec); yading@10: yading@10: if (!f->filter_context) yading@10: return AVERROR(EINVAL); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int config_props(AVFilterLink *inlink) yading@10: { yading@10: SmartblurContext *sblur = inlink->dst->priv; yading@10: const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); yading@10: yading@10: sblur->hsub = desc->log2_chroma_w; yading@10: sblur->vsub = desc->log2_chroma_h; yading@10: yading@10: alloc_sws_context(&sblur->luma, inlink->w, inlink->h, sblur->sws_flags); yading@10: alloc_sws_context(&sblur->chroma, yading@10: inlink->w >> sblur->hsub, inlink->h >> sblur->vsub, yading@10: sblur->sws_flags); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static void blur(uint8_t *dst, const int dst_linesize, yading@10: const uint8_t *src, const int src_linesize, yading@10: const int w, const int h, const int threshold, yading@10: struct SwsContext *filter_context) yading@10: { yading@10: int x, y; yading@10: int orig, filtered; yading@10: int diff; yading@10: /* Declare arrays of 4 to get aligned data */ yading@10: const uint8_t* const src_array[4] = {src}; yading@10: uint8_t *dst_array[4] = {dst}; yading@10: int src_linesize_array[4] = {src_linesize}; yading@10: int dst_linesize_array[4] = {dst_linesize}; yading@10: yading@10: sws_scale(filter_context, src_array, src_linesize_array, yading@10: 0, h, dst_array, dst_linesize_array); yading@10: yading@10: if (threshold > 0) { yading@10: for (y = 0; y < h; ++y) { yading@10: for (x = 0; x < w; ++x) { yading@10: orig = src[x + y * src_linesize]; yading@10: filtered = dst[x + y * dst_linesize]; yading@10: diff = orig - filtered; yading@10: yading@10: if (diff > 0) { yading@10: if (diff > 2 * threshold) yading@10: dst[x + y * dst_linesize] = orig; yading@10: else if (diff > threshold) yading@10: /* add 'diff' and substract 'threshold' from 'filtered' */ yading@10: dst[x + y * dst_linesize] = orig - threshold; yading@10: } else { yading@10: if (-diff > 2 * threshold) yading@10: dst[x + y * dst_linesize] = orig; yading@10: else if (-diff > threshold) yading@10: /* add 'diff' and 'threshold' to 'filtered' */ yading@10: dst[x + y * dst_linesize] = orig + threshold; yading@10: } yading@10: } yading@10: } yading@10: } else if (threshold < 0) { yading@10: for (y = 0; y < h; ++y) { yading@10: for (x = 0; x < w; ++x) { yading@10: orig = src[x + y * src_linesize]; yading@10: filtered = dst[x + y * dst_linesize]; yading@10: diff = orig - filtered; yading@10: yading@10: if (diff > 0) { yading@10: if (diff <= -threshold) yading@10: dst[x + y * dst_linesize] = orig; yading@10: else if (diff <= -2 * threshold) yading@10: /* substract 'diff' and 'threshold' from 'orig' */ yading@10: dst[x + y * dst_linesize] = filtered - threshold; yading@10: } else { yading@10: if (diff >= threshold) yading@10: dst[x + y * dst_linesize] = orig; yading@10: else if (diff >= 2 * threshold) yading@10: /* add 'threshold' and substract 'diff' from 'orig' */ yading@10: dst[x + y * dst_linesize] = filtered + threshold; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *inpic) yading@10: { yading@10: SmartblurContext *sblur = inlink->dst->priv; yading@10: AVFilterLink *outlink = inlink->dst->outputs[0]; yading@10: AVFrame *outpic; yading@10: int cw = inlink->w >> sblur->hsub; yading@10: int ch = inlink->h >> sblur->vsub; yading@10: yading@10: outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h); yading@10: if (!outpic) { yading@10: av_frame_free(&inpic); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: av_frame_copy_props(outpic, inpic); yading@10: yading@10: blur(outpic->data[0], outpic->linesize[0], yading@10: inpic->data[0], inpic->linesize[0], yading@10: inlink->w, inlink->h, sblur->luma.threshold, yading@10: sblur->luma.filter_context); yading@10: yading@10: if (inpic->data[2]) { yading@10: blur(outpic->data[1], outpic->linesize[1], yading@10: inpic->data[1], inpic->linesize[1], yading@10: cw, ch, sblur->chroma.threshold, yading@10: sblur->chroma.filter_context); yading@10: blur(outpic->data[2], outpic->linesize[2], yading@10: inpic->data[2], inpic->linesize[2], yading@10: cw, ch, sblur->chroma.threshold, yading@10: sblur->chroma.filter_context); yading@10: } yading@10: yading@10: av_frame_free(&inpic); yading@10: return ff_filter_frame(outlink, outpic); yading@10: } yading@10: yading@10: static const AVFilterPad smartblur_inputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .filter_frame = filter_frame, yading@10: .config_props = config_props, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: static const AVFilterPad smartblur_outputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFilter avfilter_vf_smartblur = { yading@10: .name = "smartblur", yading@10: .description = NULL_IF_CONFIG_SMALL("Blur the input video without impacting the outlines."), yading@10: yading@10: .priv_size = sizeof(SmartblurContext), yading@10: yading@10: .init = init, yading@10: .uninit = uninit, yading@10: .query_formats = query_formats, yading@10: .inputs = smartblur_inputs, yading@10: .outputs = smartblur_outputs, yading@10: .priv_class = &smartblur_class, yading@10: };