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avfilter: add xstack filter

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This commit is contained in:
Paul B Mahol 2018-10-24 11:00:58 +02:00
parent de43c227fd
commit 4fcfb9c4eb
6 changed files with 199 additions and 12 deletions
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151
libavfilter/vf_stack.c
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@ -29,14 +29,23 @@
#include "framesync.h"
#include "video.h"
typedef struct StackItem {
int x[4], y[4];
int linesize[4];
int height[4];
} StackItem;
typedef struct StackContext {
const AVClass *class;
const AVPixFmtDescriptor *desc;
int nb_inputs;
char *layout;
int shortest;
int is_vertical;
int is_horizontal;
int nb_planes;
StackItem *items;
AVFrame **frames;
FFFrameSync fs;
} StackContext;
@ -66,10 +75,19 @@ static av_cold int init(AVFilterContext *ctx)
if (!strcmp(ctx->filter->name, "vstack"))
s->is_vertical = 1;
if (!strcmp(ctx->filter->name, "hstack"))
s->is_horizontal = 1;
s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
if (!s->frames)
return AVERROR(ENOMEM);
if (!strcmp(ctx->filter->name, "xstack")) {
s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
if (!s->items)
return AVERROR(ENOMEM);
}
for (i = 0; i < s->nb_inputs; i++) {
AVFilterPad pad = { 0 };
@ -112,13 +130,15 @@ static int process_frame(FFFrameSync *fs)
int linesize[4];
int height[4];
if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) {
av_frame_free(&out);
return ret;
}
if (s->is_horizontal || s->is_vertical) {
if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) {
av_frame_free(&out);
return ret;
}
height[1] = height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
height[0] = height[3] = inlink->h;
height[1] = height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
height[0] = height[3] = inlink->h;
}
for (p = 0; p < s->nb_planes; p++) {
if (s->is_vertical) {
@ -128,13 +148,21 @@ static int process_frame(FFFrameSync *fs)
in[i]->linesize[p],
linesize[p], height[p]);
offset[p] += height[p];
} else {
} else if (s->is_horizontal) {
av_image_copy_plane(out->data[p] + offset[p],
out->linesize[p],
in[i]->data[p],
in[i]->linesize[p],
linesize[p], height[p]);
offset[p] += linesize[p];
} else {
StackItem *item = &s->items[i];
av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
out->linesize[p],
in[i]->data[p],
in[i]->linesize[p],
item->linesize[p], item->height[p]);
}
}
}
@ -154,6 +182,10 @@ static int config_output(AVFilterLink *outlink)
FFFrameSyncIn *in;
int i, ret;
s->desc = av_pix_fmt_desc_get(outlink->format);
if (!s->desc)
return AVERROR_BUG;
if (s->is_vertical) {
for (i = 1; i < s->nb_inputs; i++) {
if (ctx->inputs[i]->w != width) {
@ -162,7 +194,7 @@ static int config_output(AVFilterLink *outlink)
}
height += ctx->inputs[i]->h;
}
} else {
} else if (s->is_horizontal) {
for (i = 1; i < s->nb_inputs; i++) {
if (ctx->inputs[i]->h != height) {
av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match input %d height %d.\n", i, ctx->inputs[i]->h, 0, height);
@ -170,11 +202,81 @@ static int config_output(AVFilterLink *outlink)
}
width += ctx->inputs[i]->w;
}
} else {
char *arg, *p = s->layout, *saveptr = NULL;
char *arg2, *p2, *saveptr2 = NULL;
char *arg3, *p3, *saveptr3 = NULL;
int inw, inh, size;
for (i = 0; i < s->nb_inputs; i++) {
AVFilterLink *inlink = ctx->inputs[i];
StackItem *item = &s->items[i];
if (!(arg = av_strtok(p, "|", &saveptr)))
return AVERROR(EINVAL);
p = NULL;
if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
return ret;
}
item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
item->height[0] = item->height[3] = inlink->h;
p2 = arg;
inw = inh = 0;
for (int j = 0; j < 2; j++) {
if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
return AVERROR(EINVAL);
p2 = NULL;
p3 = arg2;
while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
p3 = NULL;
if (sscanf(arg3, "w%d", &size) == 1) {
if (size == i || size < 0 || size >= s->nb_inputs)
return AVERROR(EINVAL);
if (!j)
inw += ctx->inputs[size]->w;
else
inh += ctx->inputs[size]->w;
} else if (sscanf(arg3, "h%d", &size) == 1) {
if (size == i || size < 0 || size >= s->nb_inputs)
return AVERROR(EINVAL);
if (!j)
inw += ctx->inputs[size]->h;
else
inh += ctx->inputs[size]->h;
} else if (sscanf(arg3, "%d", &size) == 1) {
if (size < 0)
return AVERROR(EINVAL);
if (!j)
inw += size;
else
inh += size;
} else {
return AVERROR(EINVAL);
}
}
}
if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
return ret;
}
item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
item->y[0] = item->y[3] = inh;
width = FFMAX(width, inlink->w + inw);
height = FFMAX(height, inlink->h + inh);
}
}
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);
outlink->w = width;
@ -209,6 +311,7 @@ static av_cold void uninit(AVFilterContext *ctx)
ff_framesync_uninit(&s->fs);
av_freep(&s->frames);
av_freep(&s->items);
for (i = 0; i < ctx->nb_inputs; i++)
av_freep(&ctx->input_pads[i].name);
@ -276,3 +379,29 @@ AVFilter ff_vf_vstack = {
};
#endif /* CONFIG_VSTACK_FILTER */
#if CONFIG_XSTACK_FILTER
static const AVOption xstack_options[] = {
{ "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
{ "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str="0_0|w0_0"}, 0, 0, .flags = FLAGS },
{ "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(xstack);
AVFilter ff_vf_xstack = {
.name = "xstack",
.description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
.priv_size = sizeof(StackContext),
.priv_class = &xstack_class,
.query_formats = query_formats,
.outputs = outputs,
.init = init,
.uninit = uninit,
.activate = activate,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};
#endif /* CONFIG_XSTACK_FILTER */