From ec5328aa6f3c1650155dd2a257167f4130abb800 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Mon, 20 Nov 2017 19:58:44 +0100 Subject: [PATCH] avfilter: add mix filter Signed-off-by: Paul B Mahol --- Changelog | 1 + doc/filters.texi | 28 ++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/version.h | 4 +- libavfilter/vf_mix.c | 283 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 316 insertions(+), 2 deletions(-) create mode 100644 libavfilter/vf_mix.c diff --git a/Changelog b/Changelog index f6b70c4a34..6ef144c315 100644 --- a/Changelog +++ b/Changelog @@ -18,6 +18,7 @@ version : - mcompand audio filter - acontrast audio filter - OpenCL overlay filter +- video mix filter version 3.4: diff --git a/doc/filters.texi b/doc/filters.texi index bee626e775..76929e4db5 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -10569,6 +10569,34 @@ Default method is @samp{fdiff}. Scene change detection threshold. Default is @code{5.0}. @end table +@section mix + +Mix several video input streams into one video stream. + +A description of the accepted options follows. + +@table @option +@item nb_inputs +The number of inputs. If unspecified, it defaults to 2. + +@item weights +Specify weight of each input video stream as sequence. +Each weight is separated by space. + +@item duration +Specify how end of stream is determined. +@table @samp +@item longest +The duration of the longest input. (default) + +@item shortest +The duration of the shortest input. + +@item first +The duration of the first input. +@end table +@end table + @section mpdecimate Drop frames that do not differ greatly from the previous frame in diff --git a/libavfilter/Makefile b/libavfilter/Makefile index ec0deff86f..c47373a65b 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -240,6 +240,7 @@ OBJS-$(CONFIG_MESTIMATE_FILTER) += vf_mestimate.o motion_estimation OBJS-$(CONFIG_METADATA_FILTER) += f_metadata.o OBJS-$(CONFIG_MIDEQUALIZER_FILTER) += vf_midequalizer.o framesync.o OBJS-$(CONFIG_MINTERPOLATE_FILTER) += vf_minterpolate.o motion_estimation.o +OBJS-$(CONFIG_MIX_FILTER) += vf_mix.o OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o OBJS-$(CONFIG_NLMEANS_FILTER) += vf_nlmeans.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 50e9d9a0cb..3a9cd00fdf 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -250,6 +250,7 @@ static void register_all(void) REGISTER_FILTER(METADATA, metadata, vf); REGISTER_FILTER(MIDEQUALIZER, midequalizer, vf); REGISTER_FILTER(MINTERPOLATE, minterpolate, vf); + REGISTER_FILTER(MIX, mix, vf); REGISTER_FILTER(MPDECIMATE, mpdecimate, vf); REGISTER_FILTER(NEGATE, negate, vf); REGISTER_FILTER(NLMEANS, nlmeans, vf); diff --git a/libavfilter/version.h b/libavfilter/version.h index b449fd821d..3242c44618 100644 --- a/libavfilter/version.h +++ b/libavfilter/version.h @@ -30,8 +30,8 @@ #include "libavutil/version.h" #define LIBAVFILTER_VERSION_MAJOR 7 -#define LIBAVFILTER_VERSION_MINOR 2 -#define LIBAVFILTER_VERSION_MICRO 102 +#define LIBAVFILTER_VERSION_MINOR 3 +#define LIBAVFILTER_VERSION_MICRO 100 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \ LIBAVFILTER_VERSION_MINOR, \ diff --git a/libavfilter/vf_mix.c b/libavfilter/vf_mix.c new file mode 100644 index 0000000000..261ab066ef --- /dev/null +++ b/libavfilter/vf_mix.c @@ -0,0 +1,283 @@ +/* + * Copyright (c) 2017 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 + */ + +#include "libavutil/avstring.h" +#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" +#include "framesync.h" +#include "video.h" + +typedef struct MixContext { + const AVClass *class; + const AVPixFmtDescriptor *desc; + char *weights_str; + int nb_inputs; + int duration; + float *weights; + float wfactor; + + int depth; + int nb_planes; + int linesize[4]; + int height[4]; + + AVFrame **frames; + FFFrameSync fs; +} MixContext; + +static int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *pix_fmts = NULL; + int fmt, ret; + + for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); + if (!(desc->flags & AV_PIX_FMT_FLAG_PAL || + desc->flags & AV_PIX_FMT_FLAG_HWACCEL || + desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) && + (ret = ff_add_format(&pix_fmts, fmt)) < 0) + return ret; + } + + return ff_set_common_formats(ctx, pix_fmts); +} + +static av_cold int init(AVFilterContext *ctx) +{ + MixContext *s = ctx->priv; + char *p, *arg, *saveptr = NULL; + int i, ret; + + s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); + if (!s->frames) + return AVERROR(ENOMEM); + + s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights)); + if (!s->weights) + return AVERROR(ENOMEM); + + for (i = 0; i < s->nb_inputs; i++) { + AVFilterPad pad = { 0 }; + + pad.type = AVMEDIA_TYPE_VIDEO; + pad.name = av_asprintf("input%d", i); + if (!pad.name) + return AVERROR(ENOMEM); + + if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) { + av_freep(&pad.name); + return ret; + } + } + + p = s->weights_str; + for (i = 0; i < s->nb_inputs; i++) { + if (!(arg = av_strtok(p, " ", &saveptr))) + break; + + p = NULL; + sscanf(arg, "%f", &s->weights[i]); + s->wfactor += s->weights[i]; + } + s->wfactor = 1 / s->wfactor; + + return 0; +} + +static int process_frame(FFFrameSync *fs) +{ + AVFilterContext *ctx = fs->parent; + AVFilterLink *outlink = ctx->outputs[0]; + MixContext *s = fs->opaque; + AVFrame **in = s->frames; + AVFrame *out; + int i, p, ret, x, y; + + for (i = 0; i < s->nb_inputs; i++) { + if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0) + return ret; + } + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); + + if (s->depth <= 8) { + for (p = 0; p < s->nb_planes; p++) { + uint8_t *dst = out->data[p]; + + for (y = 0; y < s->height[p]; y++) { + for (x = 0; x < s->linesize[p]; x++) { + int val = 0; + + for (i = 0; i < s->nb_inputs; i++) { + uint8_t src = in[i]->data[p][y * s->linesize[p] + x]; + + val += src * s->weights[i]; + } + + dst[x] = val * s->wfactor; + } + + dst += out->linesize[p]; + } + } + } else { + for (p = 0; p < s->nb_planes; p++) { + uint16_t *dst = (uint16_t *)out->data[p]; + + for (y = 0; y < s->height[p]; y++) { + for (x = 0; x < s->linesize[p]; x++) { + int val = 0; + + for (i = 0; i < s->nb_inputs; i++) { + uint16_t src = AV_RN16(in[i]->data[p] + y * s->linesize[p] + x * 2); + + val += src * s->weights[i]; + } + + dst[x] = val * s->wfactor; + } + + dst += out->linesize[p] / 2; + } + } + } + + return ff_filter_frame(outlink, out); +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + MixContext *s = ctx->priv; + AVRational time_base = ctx->inputs[0]->time_base; + AVRational frame_rate = ctx->inputs[0]->frame_rate; + AVFilterLink *inlink = ctx->inputs[0]; + int height = ctx->inputs[0]->h; + int width = ctx->inputs[0]->w; + FFFrameSyncIn *in; + int i, ret; + + for (i = 1; i < s->nb_inputs; i++) { + if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) { + av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height); + return AVERROR(EINVAL); + } + } + + 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; + + outlink->w = width; + outlink->h = height; + outlink->time_base = time_base; + outlink->frame_rate = frame_rate; + + if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0) + return ret; + + in = s->fs.in; + s->fs.opaque = s; + s->fs.on_event = process_frame; + + if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) + return ret; + + s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); + s->height[0] = s->height[3] = inlink->h; + + for (i = 0; i < s->nb_inputs; i++) { + AVFilterLink *inlink = ctx->inputs[i]; + + in[i].time_base = inlink->time_base; + in[i].sync = 1; + in[i].before = EXT_STOP; + in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY; + } + + return ff_framesync_configure(&s->fs); +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + MixContext *s = ctx->priv; + int i; + + ff_framesync_uninit(&s->fs); + av_freep(&s->frames); + av_freep(&s->weights); + + for (i = 0; i < ctx->nb_inputs; i++) + av_freep(&ctx->input_pads[i].name); +} + +static int activate(AVFilterContext *ctx) +{ + MixContext *s = ctx->priv; + return ff_framesync_activate(&s->fs); +} + +#define OFFSET(x) offsetof(MixContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption mix_options[] = { + { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS }, + { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = FLAGS }, + { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" }, + { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" }, + { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" }, + { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" }, + { NULL }, +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(mix); + +AVFilter ff_vf_mix = { + .name = "mix", + .description = NULL_IF_CONFIG_SMALL("Mix video inputs."), + .priv_size = sizeof(MixContext), + .priv_class = &mix_class, + .query_formats = query_formats, + .outputs = outputs, + .init = init, + .uninit = uninit, + .activate = activate, + .flags = AVFILTER_FLAG_DYNAMIC_INPUTS, +}; -- GitLab