2 * Copyright (c) 2017 Paul B Mahol
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
30 #include "framesync.h"
33 typedef struct MixContext {
35 const AVPixFmtDescriptor *desc;
56 static int query_formats(AVFilterContext *ctx)
58 AVFilterFormats *pix_fmts = NULL;
61 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
62 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
63 if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
64 desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
65 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
66 (ret = ff_add_format(&pix_fmts, fmt)) < 0)
70 return ff_set_common_formats(ctx, pix_fmts);
73 static av_cold int init(AVFilterContext *ctx)
75 MixContext *s = ctx->priv;
76 char *p, *arg, *saveptr = NULL;
79 s->tmix = !strcmp(ctx->filter->name, "tmix");
81 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
83 return AVERROR(ENOMEM);
85 s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
87 return AVERROR(ENOMEM);
90 for (i = 0; i < s->nb_inputs; i++) {
91 AVFilterPad pad = { 0 };
93 pad.type = AVMEDIA_TYPE_VIDEO;
94 pad.name = av_asprintf("input%d", i);
96 return AVERROR(ENOMEM);
98 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
106 for (i = 0; i < s->nb_inputs; i++) {
107 if (!(arg = av_strtok(p, " ", &saveptr)))
111 av_sscanf(arg, "%f", &s->weights[i]);
112 s->wfactor += s->weights[i];
115 for (; i < s->nb_inputs; i++) {
116 s->weights[i] = s->weights[last];
117 s->wfactor += s->weights[i];
120 s->wfactor = 1 / s->wfactor;
122 s->wfactor = s->scale;
128 typedef struct ThreadData {
132 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
134 MixContext *s = ctx->priv;
135 ThreadData *td = arg;
136 AVFrame **in = td->in;
137 AVFrame *out = td->out;
141 for (p = 0; p < s->nb_planes; p++) {
142 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
143 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
144 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
146 for (y = slice_start; y < slice_end; y++) {
147 for (x = 0; x < s->linesize[p]; x++) {
150 for (i = 0; i < s->nb_inputs; i++) {
151 uint8_t src = in[i]->data[p][y * in[i]->linesize[p] + x];
153 val += src * s->weights[i];
156 dst[x] = av_clip_uint8(val * s->wfactor);
159 dst += out->linesize[p];
163 for (p = 0; p < s->nb_planes; p++) {
164 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
165 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
166 uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
168 for (y = slice_start; y < slice_end; y++) {
169 for (x = 0; x < s->linesize[p] / 2; x++) {
172 for (i = 0; i < s->nb_inputs; i++) {
173 uint16_t src = AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
175 val += src * s->weights[i];
178 dst[x] = av_clip(val * s->wfactor, 0, s->max);
181 dst += out->linesize[p] / 2;
189 static int process_frame(FFFrameSync *fs)
191 AVFilterContext *ctx = fs->parent;
192 AVFilterLink *outlink = ctx->outputs[0];
193 MixContext *s = fs->opaque;
194 AVFrame **in = s->frames;
199 for (i = 0; i < s->nb_inputs; i++) {
200 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
204 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
206 return AVERROR(ENOMEM);
207 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
211 ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
213 return ff_filter_frame(outlink, out);
216 static int config_output(AVFilterLink *outlink)
218 AVFilterContext *ctx = outlink->src;
219 MixContext *s = ctx->priv;
220 AVRational time_base = ctx->inputs[0]->time_base;
221 AVRational frame_rate = ctx->inputs[0]->frame_rate;
222 AVFilterLink *inlink = ctx->inputs[0];
223 int height = ctx->inputs[0]->h;
224 int width = ctx->inputs[0]->w;
229 for (i = 1; i < s->nb_inputs; i++) {
230 if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
231 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);
232 return AVERROR(EINVAL);
237 s->desc = av_pix_fmt_desc_get(outlink->format);
240 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
241 s->depth = s->desc->comp[0].depth;
242 s->max = (1 << s->depth) - 1;
244 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
247 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
248 s->height[0] = s->height[3] = inlink->h;
255 outlink->time_base = time_base;
256 outlink->frame_rate = frame_rate;
258 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
263 s->fs.on_event = process_frame;
265 for (i = 0; i < s->nb_inputs; i++) {
266 AVFilterLink *inlink = ctx->inputs[i];
268 in[i].time_base = inlink->time_base;
270 in[i].before = EXT_STOP;
271 in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
274 return ff_framesync_configure(&s->fs);
277 static av_cold void uninit(AVFilterContext *ctx)
279 MixContext *s = ctx->priv;
282 ff_framesync_uninit(&s->fs);
283 av_freep(&s->weights);
286 for (i = 0; i < ctx->nb_inputs; i++)
287 av_freep(&ctx->input_pads[i].name);
289 for (i = 0; i < s->nb_frames; i++)
290 av_frame_free(&s->frames[i]);
292 av_freep(&s->frames);
295 static int activate(AVFilterContext *ctx)
297 MixContext *s = ctx->priv;
298 return ff_framesync_activate(&s->fs);
301 #define OFFSET(x) offsetof(MixContext, x)
302 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
304 static const AVOption mix_options[] = {
305 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
306 { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = FLAGS },
307 { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
308 { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
309 { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
310 { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
311 { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
315 static const AVFilterPad outputs[] = {
318 .type = AVMEDIA_TYPE_VIDEO,
319 .config_props = config_output,
324 #if CONFIG_MIX_FILTER
325 AVFILTER_DEFINE_CLASS(mix);
327 AVFilter ff_vf_mix = {
329 .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
330 .priv_size = sizeof(MixContext),
331 .priv_class = &mix_class,
332 .query_formats = query_formats,
336 .activate = activate,
337 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
340 #endif /* CONFIG_MIX_FILTER */
342 #if CONFIG_TMIX_FILTER
343 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
345 AVFilterContext *ctx = inlink->dst;
346 AVFilterLink *outlink = ctx->outputs[0];
347 MixContext *s = ctx->priv;
351 if (s->nb_inputs == 1)
352 return ff_filter_frame(outlink, in);
354 if (s->nb_frames < s->nb_inputs) {
355 s->frames[s->nb_frames] = in;
357 if (s->nb_frames < s->nb_inputs)
360 av_frame_free(&s->frames[0]);
361 memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
362 s->frames[s->nb_inputs - 1] = in;
365 if (ctx->is_disabled) {
366 out = av_frame_clone(s->frames[0]);
368 return AVERROR(ENOMEM);
369 return ff_filter_frame(outlink, out);
372 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
374 return AVERROR(ENOMEM);
375 out->pts = s->frames[0]->pts;
379 ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
381 return ff_filter_frame(outlink, out);
384 static const AVOption tmix_options[] = {
385 { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
386 { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = FLAGS },
387 { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
391 static const AVFilterPad inputs[] = {
394 .type = AVMEDIA_TYPE_VIDEO,
395 .filter_frame = tmix_filter_frame,
400 AVFILTER_DEFINE_CLASS(tmix);
402 AVFilter ff_vf_tmix = {
404 .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
405 .priv_size = sizeof(MixContext),
406 .priv_class = &tmix_class,
407 .query_formats = query_formats,
412 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
415 #endif /* CONFIG_TMIX_FILTER */