/*
* Copyright (c) 2012 Nicolas George
*
* 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
*/
/**
* @file
* tile video filter
*/
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "video.h"
#include "internal.h"
typedef struct {
const AVClass *class;
unsigned w, h;
unsigned margin;
unsigned padding;
unsigned current;
unsigned nb_frames;
FFDrawContext draw;
FFDrawColor blank;
AVFrame *out_ref;
uint8_t rgba_color[4];
} TileContext;
#define REASONABLE_SIZE 1024
#define OFFSET(x) offsetof(TileContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption tile_options[] = {
{ "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
{.str = "6x5"}, 0, 0, FLAGS },
{ "nb_frames", "set maximum number of frame to render", OFFSET(nb_frames),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
{ "margin", "set outer border margin in pixels", OFFSET(margin),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
{ "padding", "set inner border thickness in pixels", OFFSET(padding),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
{ "color", "set the color of the unused area", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(tile);
static av_cold int init(AVFilterContext *ctx)
{
TileContext *tile = ctx->priv;
if (tile->w > REASONABLE_SIZE || tile->h > REASONABLE_SIZE) {
av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
tile->w, tile->h);
return AVERROR(EINVAL);
}
if (tile->nb_frames == 0) {
tile->nb_frames = tile->w * tile->h;
} else if (tile->nb_frames > tile->w * tile->h) {
av_log(ctx, AV_LOG_ERROR, "nb_frames must be less than or equal to %dx%d=%d\n",
tile->w, tile->h, tile->w * tile->h);
return AVERROR(EINVAL);
}
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
return 0;
}
static int config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin;
const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin;
if (inlink->w > (INT_MAX - total_margin_w) / tile->w) {
av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n",
tile->w, inlink->w);
return AVERROR(EINVAL);
}
if (inlink->h > (INT_MAX - total_margin_h) / tile->h) {
av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n",
tile->h, inlink->h);
return AVERROR(EINVAL);
}
outlink->w = tile->w * inlink->w + total_margin_w;
outlink->h = tile->h * inlink->h + total_margin_h;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->frame_rate = av_mul_q(inlink->frame_rate,
(AVRational){ 1, tile->nb_frames });
ff_draw_init(&tile->draw, inlink->format, 0);
ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
return 0;
}
static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y)
{
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const unsigned tx = tile->current % tile->w;
const unsigned ty = tile->current / tile->w;
*x = tile->margin + (inlink->w + tile->padding) * tx;
*y = tile->margin + (inlink->h + tile->padding) * ty;
}
static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
{
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
unsigned x0, y0;
get_current_tile_pos(ctx, &x0, &y0);
ff_fill_rectangle(&tile->draw, &tile->blank,
out_buf->data, out_buf->linesize,
x0, y0, inlink->w, inlink->h);
tile->current++;
}
static int end_last_frame(AVFilterContext *ctx)
{
TileContext *tile = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out_buf = tile->out_ref;
int ret;
while (tile->current < tile->nb_frames)
draw_blank_frame(ctx, out_buf);
ret = ff_filter_frame(outlink, out_buf);
tile->current = 0;
return ret;
}
/* Note: direct rendering is not possible since there is no guarantee that
* buffers are fed to filter_frame in the order they were obtained from
* get_buffer (think B-frames). */
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
{
AVFilterContext *ctx = inlink->dst;
TileContext *tile = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
unsigned x0, y0;
if (!tile->current) {
tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!tile->out_ref) {
av_frame_free(&picref);
return AVERROR(ENOMEM);
}
av_frame_copy_props(tile->out_ref, picref);
tile->out_ref->width = outlink->w;
tile->out_ref->height = outlink->h;
/* fill surface once for margin/padding */
if (tile->margin || tile->padding)
ff_fill_rectangle(&tile->draw, &tile->blank,
tile->out_ref->data,
tile->out_ref->linesize,
0, 0, outlink->w, outlink->h);
}
get_current_tile_pos(ctx, &x0, &y0);
ff_copy_rectangle2(&tile->draw,
tile->out_ref->data, tile->out_ref->linesize,
picref->data, picref->linesize,
x0, y0, 0, 0, inlink->w, inlink->h);
av_frame_free(&picref);
if (++tile->current == tile->nb_frames)
return end_last_frame(ctx);
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int r;
r = ff_request_frame(inlink);
if (r == AVERROR_EOF && tile->current)
r = end_last_frame(ctx);
return r;
}
static const AVFilterPad tile_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad tile_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter avfilter_vf_tile = {
.name = "tile",
.description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."),
.init = init,
.query_formats = query_formats,
.priv_size = sizeof(TileContext),
.inputs = tile_inputs,
.outputs = tile_outputs,
.priv_class = &tile_class,
};