mirror of
https://github.com/FFmpeg/FFmpeg.git
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477 lines
16 KiB
C
477 lines
16 KiB
C
/*
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* Copyright (c) 2017 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avstring.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "framesync.h"
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#include "video.h"
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typedef struct MixContext {
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const AVClass *class;
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const AVPixFmtDescriptor *desc;
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char *weights_str;
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int nb_inputs;
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int nb_threads;
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int duration;
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float *weights;
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float scale;
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float wfactor;
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int tmix;
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int nb_frames;
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int depth;
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int max;
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int planes;
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int nb_planes;
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int linesizes[4];
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int height[4];
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uint8_t **data;
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int *linesize;
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AVFrame **frames;
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FFFrameSync fs;
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} MixContext;
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static int query_formats(AVFilterContext *ctx)
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{
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unsigned reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
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AV_PIX_FMT_FLAG_HWACCEL |
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AV_PIX_FMT_FLAG_PAL;
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unsigned accept_flags = 0;
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if (!HAVE_BIGENDIAN)
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reject_flags |= AV_PIX_FMT_FLAG_BE;
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else
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accept_flags |= AV_PIX_FMT_FLAG_BE;
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return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(accept_flags, reject_flags));
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}
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static int parse_weights(AVFilterContext *ctx)
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{
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MixContext *s = ctx->priv;
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char *p, *arg, *saveptr = NULL;
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int i, last = 0;
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s->wfactor = 0.f;
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p = s->weights_str;
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for (i = 0; i < s->nb_inputs; i++) {
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if (!(arg = av_strtok(p, " |", &saveptr)))
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break;
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p = NULL;
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if (av_sscanf(arg, "%f", &s->weights[i]) != 1) {
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av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i);
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return AVERROR(EINVAL);
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}
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s->wfactor += s->weights[i];
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last = i;
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}
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for (; i < s->nb_inputs; i++) {
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s->weights[i] = s->weights[last];
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s->wfactor += s->weights[i];
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}
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if (s->scale == 0) {
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s->wfactor = 1 / s->wfactor;
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} else {
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s->wfactor = s->scale;
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}
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return 0;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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MixContext *s = ctx->priv;
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int ret;
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s->tmix = !strcmp(ctx->filter->name, "tmix");
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s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
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if (!s->frames)
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return AVERROR(ENOMEM);
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s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
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if (!s->weights)
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return AVERROR(ENOMEM);
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if (!s->tmix) {
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for (int i = 0; i < s->nb_inputs; i++) {
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AVFilterPad pad = { 0 };
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pad.type = AVMEDIA_TYPE_VIDEO;
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pad.name = av_asprintf("input%d", i);
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if (!pad.name)
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return AVERROR(ENOMEM);
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if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
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return ret;
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}
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}
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return parse_weights(ctx);
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}
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typedef struct ThreadData {
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AVFrame **in, *out;
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} ThreadData;
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#define MIX_SLICE(type, fun, clip) \
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for (int p = 0; p < s->nb_planes; p++) { \
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const int slice_start = (s->height[p] * jobnr) / nb_jobs; \
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const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; \
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const int width = s->linesizes[p] / sizeof(type); \
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type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
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ptrdiff_t dst_linesize = out->linesize[p] / sizeof(type); \
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\
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if (!((1 << p) & s->planes)) { \
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av_image_copy_plane((uint8_t *)dst, out->linesize[p], \
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in[0]->data[p] + slice_start * in[0]->linesize[p], \
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in[0]->linesize[p], \
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s->linesizes[p], slice_end - slice_start); \
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continue; \
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} \
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\
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for (int i = 0; i < s->nb_inputs; i++) \
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linesize[i] = in[i]->linesize[p]; \
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\
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for (int i = 0; i < s->nb_inputs; i++) \
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srcf[i] = in[i]->data[p] + slice_start * linesize[i]; \
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\
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for (int y = slice_start; y < slice_end; y++) { \
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for (int x = 0; x < width; x++) { \
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float val = 0.f; \
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\
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for (int i = 0; i < s->nb_inputs; i++) { \
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float src = *(type *)(srcf[i] + x * sizeof(type)); \
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\
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val += src * weights[i]; \
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} \
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\
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dst[x] = clip(fun(val * s->wfactor), 0, s->max); \
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} \
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\
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dst += dst_linesize; \
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for (int i = 0; i < s->nb_inputs; i++) \
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srcf[i] += linesize[i]; \
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} \
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}
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#define CLIP8(x, min, max) av_clip_uint8(x)
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#define CLIP16(x, min, max) av_clip(x, min, max)
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#define CLIPF(x, min, max) (x)
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#define NOP(x) (x)
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static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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MixContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame **in = td->in;
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AVFrame *out = td->out;
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const float *weights = s->weights;
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uint8_t **srcf = s->data + jobnr * s->nb_inputs;
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int *linesize = s->linesize + jobnr * s->nb_inputs;
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if (s->depth <= 8) {
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MIX_SLICE(uint8_t, lrintf, CLIP8)
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} else if (s->depth <= 16) {
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MIX_SLICE(uint16_t, lrintf, CLIP16)
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} else {
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MIX_SLICE(float, NOP, CLIPF)
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}
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return 0;
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}
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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AVFilterLink *outlink = ctx->outputs[0];
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MixContext *s = fs->opaque;
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AVFrame **in = s->frames;
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AVFrame *out;
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ThreadData td;
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int i, ret;
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for (i = 0; i < s->nb_inputs; i++) {
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if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
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return ret;
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}
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if (ctx->is_disabled) {
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out = av_frame_clone(s->frames[0]);
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if (!out)
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return AVERROR(ENOMEM);
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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return ff_filter_frame(outlink, out);
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}
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out)
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return AVERROR(ENOMEM);
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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td.in = in;
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td.out = out;
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ff_filter_execute(ctx, mix_frames, &td, NULL,
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FFMIN(s->height[0], s->nb_threads));
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return ff_filter_frame(outlink, out);
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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MixContext *s = ctx->priv;
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AVRational frame_rate = ctx->inputs[0]->frame_rate;
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AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
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AVFilterLink *inlink = ctx->inputs[0];
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int height = ctx->inputs[0]->h;
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int width = ctx->inputs[0]->w;
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FFFrameSyncIn *in;
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int i, ret;
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if (!s->tmix) {
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for (i = 1; i < s->nb_inputs; i++) {
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if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
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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);
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return AVERROR(EINVAL);
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}
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}
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}
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s->nb_threads = ff_filter_get_nb_threads(ctx);
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s->desc = av_pix_fmt_desc_get(outlink->format);
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if (!s->desc)
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return AVERROR_BUG;
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s->nb_planes = av_pix_fmt_count_planes(outlink->format);
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s->depth = s->desc->comp[0].depth;
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s->max = (1 << s->depth) - 1;
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if ((ret = av_image_fill_linesizes(s->linesizes, inlink->format, inlink->w)) < 0)
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return ret;
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s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
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s->height[0] = s->height[3] = inlink->h;
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s->data = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->data));
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if (!s->data)
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return AVERROR(ENOMEM);
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s->linesize = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->linesize));
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if (!s->linesize)
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return AVERROR(ENOMEM);
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if (s->tmix)
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return 0;
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outlink->w = width;
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outlink->h = height;
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outlink->frame_rate = frame_rate;
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outlink->sample_aspect_ratio = sar;
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if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
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return ret;
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in = s->fs.in;
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
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for (i = 0; i < s->nb_inputs; i++) {
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AVFilterLink *inlink = ctx->inputs[i];
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in[i].time_base = inlink->time_base;
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in[i].sync = 1;
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in[i].before = EXT_STOP;
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in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
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}
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ret = ff_framesync_configure(&s->fs);
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outlink->time_base = s->fs.time_base;
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return ret;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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MixContext *s = ctx->priv;
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int i;
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ff_framesync_uninit(&s->fs);
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av_freep(&s->weights);
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av_freep(&s->data);
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av_freep(&s->linesize);
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if (s->tmix) {
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for (i = 0; i < s->nb_frames && s->frames; i++)
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av_frame_free(&s->frames[i]);
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}
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av_freep(&s->frames);
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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int ret;
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ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
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if (ret < 0)
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return ret;
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return parse_weights(ctx);
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}
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static int activate(AVFilterContext *ctx)
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{
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MixContext *s = ctx->priv;
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return ff_framesync_activate(&s->fs);
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}
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#define OFFSET(x) offsetof(MixContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
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#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption mix_options[] = {
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{ "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
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{ "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS },
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{ "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS },
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{ "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
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{ "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
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{ "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
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{ "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
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{ NULL },
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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};
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#if CONFIG_MIX_FILTER
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AVFILTER_DEFINE_CLASS(mix);
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const AVFilter ff_vf_mix = {
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.name = "mix",
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.description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
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.priv_size = sizeof(MixContext),
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.priv_class = &mix_class,
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FILTER_OUTPUTS(outputs),
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FILTER_QUERY_FUNC(query_formats),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS |
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AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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.process_command = process_command,
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};
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#endif /* CONFIG_MIX_FILTER */
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#if CONFIG_TMIX_FILTER
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static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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MixContext *s = ctx->priv;
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ThreadData td;
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AVFrame *out;
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if (s->nb_inputs == 1)
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return ff_filter_frame(outlink, in);
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if (s->nb_frames < s->nb_inputs) {
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s->frames[s->nb_frames] = in;
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s->nb_frames++;
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if (s->nb_frames < s->nb_inputs)
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return 0;
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} else {
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av_frame_free(&s->frames[0]);
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memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
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s->frames[s->nb_inputs - 1] = in;
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}
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if (ctx->is_disabled) {
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out = av_frame_clone(s->frames[0]);
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if (!out)
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return AVERROR(ENOMEM);
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return ff_filter_frame(outlink, out);
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}
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out)
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return AVERROR(ENOMEM);
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out->pts = s->frames[0]->pts;
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td.out = out;
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td.in = s->frames;
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ff_filter_execute(ctx, mix_frames, &td, NULL,
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FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
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return ff_filter_frame(outlink, out);
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}
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static const AVOption tmix_options[] = {
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{ "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 1024, .flags = FLAGS },
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{ "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS },
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{ "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS },
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{ NULL },
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};
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = tmix_filter_frame,
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},
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};
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AVFILTER_DEFINE_CLASS(tmix);
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const AVFilter ff_vf_tmix = {
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.name = "tmix",
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.description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
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.priv_size = sizeof(MixContext),
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.priv_class = &tmix_class,
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FILTER_OUTPUTS(outputs),
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FILTER_INPUTS(inputs),
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FILTER_QUERY_FUNC(query_formats),
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.init = init,
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.uninit = uninit,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = process_command,
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};
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#endif /* CONFIG_TMIX_FILTER */
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