mirror of
https://github.com/FFmpeg/FFmpeg.git
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139 lines
4.0 KiB
C
139 lines
4.0 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/common.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.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_desc_get(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 int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
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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 *out;
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int i, c, w = inlink->w, h = inlink->h;
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE,
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outlink->w, outlink->h);
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if (!out) {
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avfilter_unref_bufferp(&in);
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return AVERROR(ENOMEM);
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}
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avfilter_copy_buffer_ref_props(out, in);
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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 (out->data[i]) {
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uint8_t *data = out->data[i] +
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(out->linesize[i] > 0 ? 0 : out->linesize[i] * (h-1));
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memset(data, 0, FFABS(out->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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priv->pix_desc->flags & PIX_FMT_PSEUDOPAL)
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memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
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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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for (i = 0; i < h1; i++) {
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av_read_image_line(priv->line,
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(void*)in->data,
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in->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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out->data,
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out->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_unref_bufferp(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.config_props = config_props,
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.min_perms = AV_PERM_READ,
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},
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{ NULL }
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};
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static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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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 = avfilter_vf_pixdesctest_inputs,
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.outputs = avfilter_vf_pixdesctest_outputs,
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};
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