yading@10: /*
yading@10:  * Copyright (c) 2009 Stefano Sabatini
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * pixdesc test filter
yading@10:  */
yading@10: 
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/pixdesc.h"
yading@10: #include "avfilter.h"
yading@10: #include "internal.h"
yading@10: #include "video.h"
yading@10: 
yading@10: typedef struct {
yading@10:     const AVPixFmtDescriptor *pix_desc;
yading@10:     uint16_t *line;
yading@10: } PixdescTestContext;
yading@10: 
yading@10: static av_cold void uninit(AVFilterContext *ctx)
yading@10: {
yading@10:     PixdescTestContext *priv = ctx->priv;
yading@10:     av_freep(&priv->line);
yading@10: }
yading@10: 
yading@10: static int config_props(AVFilterLink *inlink)
yading@10: {
yading@10:     PixdescTestContext *priv = inlink->dst->priv;
yading@10: 
yading@10:     priv->pix_desc = av_pix_fmt_desc_get(inlink->format);
yading@10: 
yading@10:     if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *in)
yading@10: {
yading@10:     PixdescTestContext *priv = inlink->dst->priv;
yading@10:     AVFilterLink *outlink    = inlink->dst->outputs[0];
yading@10:     AVFrame *out;
yading@10:     int i, c, w = inlink->w, h = inlink->h;
yading@10: 
yading@10:     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
yading@10:     if (!out) {
yading@10:         av_frame_free(&in);
yading@10:         return AVERROR(ENOMEM);
yading@10:     }
yading@10: 
yading@10:     av_frame_copy_props(out, in);
yading@10: 
yading@10:     for (i = 0; i < 4; i++) {
yading@10:         int h = outlink->h;
yading@10:         h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
yading@10:         if (out->data[i]) {
yading@10:             uint8_t *data = out->data[i] +
yading@10:                 (out->linesize[i] > 0 ? 0 : out->linesize[i] * (h-1));
yading@10:             memset(data, 0, FFABS(out->linesize[i]) * h);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     /* copy palette */
yading@10:     if (priv->pix_desc->flags & PIX_FMT_PAL ||
yading@10:         priv->pix_desc->flags & PIX_FMT_PSEUDOPAL)
yading@10:         memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
yading@10: 
yading@10:     for (c = 0; c < priv->pix_desc->nb_components; c++) {
yading@10:         int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
yading@10:         int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
yading@10: 
yading@10:         for (i = 0; i < h1; i++) {
yading@10:             av_read_image_line(priv->line,
yading@10:                                (void*)in->data,
yading@10:                                in->linesize,
yading@10:                                priv->pix_desc,
yading@10:                                0, i, c, w1, 0);
yading@10: 
yading@10:             av_write_image_line(priv->line,
yading@10:                                 out->data,
yading@10:                                 out->linesize,
yading@10:                                 priv->pix_desc,
yading@10:                                 0, i, c, w1);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     av_frame_free(&in);
yading@10:     return ff_filter_frame(outlink, out);
yading@10: }
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
yading@10:     {
yading@10:         .name         = "default",
yading@10:         .type         = AVMEDIA_TYPE_VIDEO,
yading@10:         .filter_frame = filter_frame,
yading@10:         .config_props = config_props,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
yading@10:     {
yading@10:         .name = "default",
yading@10:         .type = AVMEDIA_TYPE_VIDEO,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_vf_pixdesctest = {
yading@10:     .name        = "pixdesctest",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
yading@10: 
yading@10:     .priv_size = sizeof(PixdescTestContext),
yading@10:     .uninit    = uninit,
yading@10: 
yading@10:     .inputs    = avfilter_vf_pixdesctest_inputs,
yading@10: 
yading@10:     .outputs   = avfilter_vf_pixdesctest_outputs,
yading@10: };