diff options
Diffstat (limited to 'libavfilter/vf_tile.c')
| -rw-r--r-- | libavfilter/vf_tile.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/libavfilter/vf_tile.c b/libavfilter/vf_tile.c new file mode 100644 index 0000000000..786f4f6630 --- /dev/null +++ b/libavfilter/vf_tile.c @@ -0,0 +1,245 @@ +/* + * 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 ff_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, +}; |