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  1. /*
  2.  * Copyright (c) 2009 Stefano Sabatini
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. /**
  22.  * @file
  23.  * pixdesc test filter
  24.  */
  25.  
  26. #include "libavutil/common.h"
  27. #include "libavutil/pixdesc.h"
  28. #include "avfilter.h"
  29. #include "internal.h"
  30. #include "video.h"
  31.  
  32. typedef struct {
  33.     const AVPixFmtDescriptor *pix_desc;
  34.     uint16_t *line;
  35. } PixdescTestContext;
  36.  
  37. static av_cold void uninit(AVFilterContext *ctx)
  38. {
  39.     PixdescTestContext *priv = ctx->priv;
  40.     av_freep(&priv->line);
  41. }
  42.  
  43. static int config_props(AVFilterLink *inlink)
  44. {
  45.     PixdescTestContext *priv = inlink->dst->priv;
  46.  
  47.     priv->pix_desc = av_pix_fmt_desc_get(inlink->format);
  48.  
  49.     av_freep(&priv->line);
  50.     if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
  51.         return AVERROR(ENOMEM);
  52.  
  53.     return 0;
  54. }
  55.  
  56. static int filter_frame(AVFilterLink *inlink, AVFrame *in)
  57. {
  58.     PixdescTestContext *priv = inlink->dst->priv;
  59.     AVFilterLink *outlink    = inlink->dst->outputs[0];
  60.     AVFrame *out;
  61.     int i, c, w = inlink->w, h = inlink->h;
  62.     const int cw = FF_CEIL_RSHIFT(w, priv->pix_desc->log2_chroma_w);
  63.     const int ch = FF_CEIL_RSHIFT(h, priv->pix_desc->log2_chroma_h);
  64.  
  65.     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
  66.     if (!out) {
  67.         av_frame_free(&in);
  68.         return AVERROR(ENOMEM);
  69.     }
  70.  
  71.     av_frame_copy_props(out, in);
  72.  
  73.     for (i = 0; i < 4; i++) {
  74.         const int h1 = i == 1 || i == 2 ? ch : h;
  75.         if (out->data[i]) {
  76.             uint8_t *data = out->data[i] +
  77.                 (out->linesize[i] > 0 ? 0 : out->linesize[i] * (h1-1));
  78.             memset(data, 0, FFABS(out->linesize[i]) * h1);
  79.         }
  80.     }
  81.  
  82.     /* copy palette */
  83.     if (priv->pix_desc->flags & AV_PIX_FMT_FLAG_PAL ||
  84.         priv->pix_desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
  85.         memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
  86.  
  87.     for (c = 0; c < priv->pix_desc->nb_components; c++) {
  88.         const int w1 = c == 1 || c == 2 ? cw : w;
  89.         const int h1 = c == 1 || c == 2 ? ch : h;
  90.  
  91.         for (i = 0; i < h1; i++) {
  92.             av_read_image_line(priv->line,
  93.                                (void*)in->data,
  94.                                in->linesize,
  95.                                priv->pix_desc,
  96.                                0, i, c, w1, 0);
  97.  
  98.             av_write_image_line(priv->line,
  99.                                 out->data,
  100.                                 out->linesize,
  101.                                 priv->pix_desc,
  102.                                 0, i, c, w1);
  103.         }
  104.     }
  105.  
  106.     av_frame_free(&in);
  107.     return ff_filter_frame(outlink, out);
  108. }
  109.  
  110. static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
  111.     {
  112.         .name         = "default",
  113.         .type         = AVMEDIA_TYPE_VIDEO,
  114.         .filter_frame = filter_frame,
  115.         .config_props = config_props,
  116.     },
  117.     { NULL }
  118. };
  119.  
  120. static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
  121.     {
  122.         .name = "default",
  123.         .type = AVMEDIA_TYPE_VIDEO,
  124.     },
  125.     { NULL }
  126. };
  127.  
  128. AVFilter avfilter_vf_pixdesctest = {
  129.     .name        = "pixdesctest",
  130.     .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
  131.     .priv_size   = sizeof(PixdescTestContext),
  132.     .uninit      = uninit,
  133.     .inputs      = avfilter_vf_pixdesctest_inputs,
  134.     .outputs     = avfilter_vf_pixdesctest_outputs,
  135. };
  136.