| /* |
| * Copyright (c) 2009 Stefano Sabatini |
| * |
| * 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 |
| * pixdesc test filter |
| */ |
| |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| |
| typedef struct { |
| const AVPixFmtDescriptor *pix_desc; |
| uint16_t *line; |
| } PixdescTestContext; |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| PixdescTestContext *priv = ctx->priv; |
| av_freep(&priv->line); |
| } |
| |
| static int config_props(AVFilterLink *inlink) |
| { |
| PixdescTestContext *priv = inlink->dst->priv; |
| |
| priv->pix_desc = &av_pix_fmt_descriptors[inlink->format]; |
| |
| if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w))) |
| return AVERROR(ENOMEM); |
| |
| return 0; |
| } |
| |
| static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) |
| { |
| PixdescTestContext *priv = inlink->dst->priv; |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| AVFilterBufferRef *outpicref; |
| int i; |
| |
| outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, |
| outlink->w, outlink->h); |
| outpicref = outlink->out_buf; |
| avfilter_copy_buffer_ref_props(outpicref, picref); |
| |
| for (i = 0; i < 4; i++) { |
| int h = outlink->h; |
| h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h; |
| if (outpicref->data[i]) { |
| uint8_t *data = outpicref->data[i] + |
| (outpicref->linesize[i] > 0 ? 0 : outpicref->linesize[i] * (h-1)); |
| memset(data, 0, FFABS(outpicref->linesize[i]) * h); |
| } |
| } |
| |
| /* copy palette */ |
| if (priv->pix_desc->flags & PIX_FMT_PAL) |
| memcpy(outpicref->data[1], outpicref->data[1], 256*4); |
| |
| avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0)); |
| } |
| |
| static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) |
| { |
| PixdescTestContext *priv = inlink->dst->priv; |
| AVFilterBufferRef *inpic = inlink->cur_buf; |
| AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf; |
| int i, c, w = inlink->w; |
| |
| for (c = 0; c < priv->pix_desc->nb_components; c++) { |
| int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w; |
| int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h; |
| int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y; |
| |
| for (i = y1; i < y1 + h1; i++) { |
| av_read_image_line(priv->line, |
| inpic->data, |
| inpic->linesize, |
| priv->pix_desc, |
| 0, i, c, w1, 0); |
| |
| av_write_image_line(priv->line, |
| outpic->data, |
| outpic->linesize, |
| priv->pix_desc, |
| 0, i, c, w1); |
| } |
| } |
| |
| avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir); |
| } |
| |
| AVFilter avfilter_vf_pixdesctest = { |
| .name = "pixdesctest", |
| .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."), |
| |
| .priv_size = sizeof(PixdescTestContext), |
| .uninit = uninit, |
| |
| .inputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .start_frame = start_frame, |
| .draw_slice = draw_slice, |
| .config_props = config_props, |
| .min_perms = AV_PERM_READ, }, |
| { .name = NULL}}, |
| |
| .outputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, }, |
| { .name = NULL}}, |
| }; |