73d72ab8de1283132a9cb6736ffc11f182bb5e4f
[libav.git] / libavfilter / vf_showinfo.c
1 /*
2 * Copyright (c) 2011 Stefano Sabatini
3 * This file is part of Libav.
4 *
5 * Libav is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * Libav is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with Libav; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /**
21 * @file
22 * filter for showing textual video frame information
23 */
24
25 #include <inttypes.h>
26
27 #include "libavutil/adler32.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/pixdesc.h"
31 #include "avfilter.h"
32 #include "internal.h"
33 #include "video.h"
34
35 typedef struct {
36 unsigned int frame;
37 } ShowInfoContext;
38
39 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
40 {
41 AVFilterContext *ctx = inlink->dst;
42 ShowInfoContext *showinfo = ctx->priv;
43 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
44 uint32_t plane_checksum[4] = {0}, checksum = 0;
45 int i, plane, vsub = desc->log2_chroma_h;
46
47 for (plane = 0; frame->data[plane] && plane < 4; plane++) {
48 size_t linesize = av_image_get_linesize(frame->format, frame->width, plane);
49 uint8_t *data = frame->data[plane];
50 int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
51
52 for (i = 0; i < h; i++) {
53 plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
54 checksum = av_adler32_update(checksum, data, linesize);
55 data += frame->linesize[plane];
56 }
57 }
58
59 av_log(ctx, AV_LOG_INFO,
60 "n:%d pts:%"PRId64" pts_time:%f "
61 "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
62 "checksum:%"PRIu32" plane_checksum:[%"PRIu32" %"PRIu32" %"PRIu32" %"PRIu32"]\n",
63 showinfo->frame,
64 frame->pts, frame->pts * av_q2d(inlink->time_base),
65 desc->name,
66 frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,
67 frame->width, frame->height,
68 !frame->interlaced_frame ? 'P' : /* Progressive */
69 frame->top_field_first ? 'T' : 'B', /* Top / Bottom */
70 frame->key_frame,
71 av_get_picture_type_char(frame->pict_type),
72 checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]);
73
74 showinfo->frame++;
75 return ff_filter_frame(inlink->dst->outputs[0], frame);
76 }
77
78 static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
79 {
80 .name = "default",
81 .type = AVMEDIA_TYPE_VIDEO,
82 .get_video_buffer = ff_null_get_video_buffer,
83 .filter_frame = filter_frame,
84 },
85 { NULL }
86 };
87
88 static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
89 {
90 .name = "default",
91 .type = AVMEDIA_TYPE_VIDEO
92 },
93 { NULL }
94 };
95
96 AVFilter ff_vf_showinfo = {
97 .name = "showinfo",
98 .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
99
100 .priv_size = sizeof(ShowInfoContext),
101
102 .inputs = avfilter_vf_showinfo_inputs,
103
104 .outputs = avfilter_vf_showinfo_outputs,
105 };