| /* |
| * 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/pixdesc.h" |
| #include "avfilter.h" |
| #include "drawutils.h" |
| |
| typedef struct { |
| unsigned w, h; |
| unsigned current; |
| FFDrawContext draw; |
| FFDrawColor blank; |
| } TileContext; |
| |
| #define REASONABLE_SIZE 1024 |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| TileContext *tile = ctx->priv; |
| int r; |
| char dummy; |
| |
| if (!args) |
| args = "6x5"; |
| r = sscanf(args, "%ux%u%c", &tile->w, &tile->h, &dummy); |
| if (r != 2 || !tile->w || !tile->h) |
| return AVERROR(EINVAL); |
| 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); |
| } |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| avfilter_set_common_pixel_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]; |
| |
| if (inlink->w > INT_MAX / 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 / 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; |
| outlink->h = tile->h * inlink->h; |
| outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
| ff_draw_init(&tile->draw, inlink->format, 0); |
| /* TODO make the color an option, or find an unified way of choosing it */ |
| ff_draw_color(&tile->draw, &tile->blank, (uint8_t[]){ 0, 0, 0, -1 }); |
| |
| return 0; |
| } |
| |
| /* Note: direct rendering is not possible since there is no guarantee that |
| * buffers are fed to start_frame in the order they were obtained from |
| * get_buffer (think B-frames). */ |
| |
| static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| TileContext *tile = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| |
| if (tile->current) |
| return; |
| outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, |
| outlink->w, outlink->h); |
| avfilter_copy_buffer_ref_props(outlink->out_buf, picref); |
| outlink->out_buf->video->w = outlink->w; |
| outlink->out_buf->video->h = outlink->h; |
| avfilter_start_frame(outlink, outlink->out_buf); |
| } |
| |
| static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| TileContext *tile = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| unsigned x0 = inlink->w * (tile->current % tile->w); |
| unsigned y0 = inlink->h * (tile->current / tile->w); |
| |
| ff_copy_rectangle2(&tile->draw, |
| outlink->out_buf->data, outlink->out_buf->linesize, |
| inlink ->cur_buf->data, inlink ->cur_buf->linesize, |
| x0, y0 + y, 0, y, inlink->cur_buf->video->w, h); |
| /* TODO if tile->w == 1 && slice_dir is always 1, we could draw_slice |
| * immediately. */ |
| } |
| |
| static void draw_blank_frame(AVFilterContext *ctx) |
| { |
| TileContext *tile = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| unsigned x0 = inlink->w * (tile->current % tile->w); |
| unsigned y0 = inlink->h * (tile->current / tile->w); |
| |
| ff_fill_rectangle(&tile->draw, &tile->blank, |
| outlink->out_buf->data, outlink->out_buf->linesize, |
| x0, y0, inlink->w, inlink->h); |
| tile->current++; |
| } |
| static void end_last_frame(AVFilterContext *ctx) |
| { |
| TileContext *tile = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| |
| while (tile->current < tile->w * tile->h) |
| draw_blank_frame(ctx); |
| avfilter_draw_slice(outlink, 0, outlink->out_buf->video->h, 1); |
| avfilter_end_frame(outlink); |
| tile->current = 0; |
| } |
| |
| static void end_frame(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| TileContext *tile = ctx->priv; |
| |
| avfilter_unref_buffer(inlink->cur_buf); |
| if (++tile->current == tile->w * tile->h) |
| end_last_frame(ctx); |
| } |
| |
| static int request_frame(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| TileContext *tile = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| int r; |
| |
| while (1) { |
| r = avfilter_request_frame(inlink); |
| if (r < 0) { |
| if (r == AVERROR_EOF && tile->current) |
| end_last_frame(ctx); |
| else |
| return r; |
| break; |
| } |
| if (!tile->current) /* done */ |
| break; |
| } |
| return 0; |
| } |
| |
| |
| 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 = (const AVFilterPad[]) { |
| { .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .start_frame = start_frame, |
| .draw_slice = draw_slice, |
| .end_frame = end_frame, |
| .min_perms = AV_PERM_READ, }, |
| { .name = NULL } |
| }, |
| .outputs = (const AVFilterPad[]) { |
| { .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_props, |
| .request_frame = request_frame }, |
| { .name = NULL } |
| }, |
| }; |