2 * Copyright (c) 2011 Stefano Sabatini
3 * This file is part of FFmpeg.
5 * FFmpeg 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.
10 * FFmpeg 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.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with FFmpeg; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * filter for showing textual video frame information
25 #include "libavutil/adler32.h"
26 #include "libavutil/imgutils.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/timestamp.h"
38 static av_cold int init(AVFilterContext *ctx, const char *args)
40 ShowInfoContext *showinfo = ctx->priv;
45 static int end_frame(AVFilterLink *inlink)
47 AVFilterContext *ctx = inlink->dst;
48 ShowInfoContext *showinfo = ctx->priv;
49 AVFilterBufferRef *picref = inlink->cur_buf;
50 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
51 uint32_t plane_checksum[4] = {0}, checksum = 0;
52 int i, plane, vsub = desc->log2_chroma_h;
54 for (plane = 0; picref->data[plane] && plane < 4; plane++) {
55 int64_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane);
56 uint8_t *data = picref->data[plane];
57 int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
62 for (i = 0; i < h; i++) {
63 plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
64 checksum = av_adler32_update(checksum, data, linesize);
65 data += picref->linesize[plane];
69 av_log(ctx, AV_LOG_INFO,
70 "n:%d pts:%s pts_time:%s pos:%"PRId64" "
71 "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
72 "checksum:%08X plane_checksum:[%08X",
74 av_ts2str(picref->pts), av_ts2timestr(picref->pts, &inlink->time_base), picref->pos,
76 picref->video->sample_aspect_ratio.num, picref->video->sample_aspect_ratio.den,
77 picref->video->w, picref->video->h,
78 !picref->video->interlaced ? 'P' : /* Progressive */
79 picref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
80 picref->video->key_frame,
81 av_get_picture_type_char(picref->video->pict_type),
82 checksum, plane_checksum[0]);
84 for (plane = 1; picref->data[plane] && plane < 4; plane++)
85 av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
86 av_log(ctx, AV_LOG_INFO, "]\n");
89 return ff_end_frame(inlink->dst->outputs[0]);
92 static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
95 .type = AVMEDIA_TYPE_VIDEO,
96 .get_video_buffer = ff_null_get_video_buffer,
97 .start_frame = ff_null_start_frame,
98 .end_frame = end_frame,
99 .min_perms = AV_PERM_READ,
104 static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
107 .type = AVMEDIA_TYPE_VIDEO
112 AVFilter avfilter_vf_showinfo = {
114 .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
116 .priv_size = sizeof(ShowInfoContext),
119 .inputs = avfilter_vf_showinfo_inputs,
121 .outputs = avfilter_vf_showinfo_outputs,