| 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 PixdescTestContext { |
| 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_array(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 ff_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 | }; |