mirror of
https://github.com/FFmpeg/FFmpeg.git
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130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
/*
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* Copyright (c) 2009 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* pixdesc test filter
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*/
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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typedef struct {
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const AVPixFmtDescriptor *pix_desc;
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uint16_t *line;
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} PixdescTestContext;
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static av_cold void uninit(AVFilterContext *ctx)
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{
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PixdescTestContext *priv = ctx->priv;
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av_freep(&priv->line);
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}
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static int config_props(AVFilterLink *inlink)
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{
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PixdescTestContext *priv = inlink->dst->priv;
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priv->pix_desc = &av_pix_fmt_descriptors[inlink->format];
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if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
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return AVERROR(ENOMEM);
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return 0;
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}
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static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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{
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PixdescTestContext *priv = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFilterBufferRef *outpicref;
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int i;
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outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
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outlink->w, outlink->h);
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outpicref = outlink->out_buf;
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avfilter_copy_buffer_ref_props(outpicref, picref);
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for (i = 0; i < 4; i++) {
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int h = outlink->h;
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h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
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if (outpicref->data[i]) {
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uint8_t *data = outpicref->data[i] +
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(outpicref->linesize[i] > 0 ? 0 : outpicref->linesize[i] * (h-1));
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memset(data, 0, FFABS(outpicref->linesize[i]) * h);
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}
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}
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/* copy palette */
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if (priv->pix_desc->flags & PIX_FMT_PAL)
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memcpy(outpicref->data[1], outpicref->data[1], 256*4);
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avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0));
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}
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static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
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{
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PixdescTestContext *priv = inlink->dst->priv;
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AVFilterBufferRef *inpic = inlink->cur_buf;
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AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
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int i, c, w = inlink->w;
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for (c = 0; c < priv->pix_desc->nb_components; c++) {
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int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
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int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
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int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y;
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for (i = y1; i < y1 + h1; i++) {
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av_read_image_line(priv->line,
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(void*)inpic->data,
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inpic->linesize,
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priv->pix_desc,
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0, i, c, w1, 0);
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av_write_image_line(priv->line,
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outpic->data,
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outpic->linesize,
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priv->pix_desc,
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0, i, c, w1);
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}
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}
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avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
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}
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AVFilter avfilter_vf_pixdesctest = {
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.name = "pixdesctest",
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.description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
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.priv_size = sizeof(PixdescTestContext),
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.uninit = uninit,
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.start_frame = start_frame,
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.draw_slice = draw_slice,
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.config_props = config_props,
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.min_perms = AV_PERM_READ, },
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO, },
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{ .name = NULL}},
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};
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