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 int filter_frame(AVFilterLink *inlink, AVFrame *frame)
40 AVFilterContext *ctx = inlink->dst;
41 ShowInfoContext *showinfo = ctx->priv;
42 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
43 uint32_t plane_checksum[4] = {0}, checksum = 0;
44 int i, plane, vsub = desc->log2_chroma_h;
46 for (plane = 0; plane < 4 && frame->data[plane]; plane++) {
47 int64_t linesize = av_image_get_linesize(frame->format, frame->width, plane);
48 uint8_t *data = frame->data[plane];
49 int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
54 for (i = 0; i < h; i++) {
55 plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
56 checksum = av_adler32_update(checksum, data, linesize);
57 data += frame->linesize[plane];
61 av_log(ctx, AV_LOG_INFO,
62 "n:%d pts:%s pts_time:%s pos:%"PRId64" "
63 "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
64 "checksum:%08X plane_checksum:[%08X",
66 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base), av_frame_get_pkt_pos(frame),
68 frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,
69 frame->width, frame->height,
70 !frame->interlaced_frame ? 'P' : /* Progressive */
71 frame->top_field_first ? 'T' : 'B', /* Top / Bottom */
73 av_get_picture_type_char(frame->pict_type),
74 checksum, plane_checksum[0]);
76 for (plane = 1; plane < 4 && frame->data[plane]; plane++)
77 av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
78 av_log(ctx, AV_LOG_INFO, "]\n");
81 return ff_filter_frame(inlink->dst->outputs[0], frame);
84 static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
87 .type = AVMEDIA_TYPE_VIDEO,
88 .get_video_buffer = ff_null_get_video_buffer,
89 .filter_frame = filter_frame,
94 static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
97 .type = AVMEDIA_TYPE_VIDEO
102 AVFilter avfilter_vf_showinfo = {
104 .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
106 .priv_size = sizeof(ShowInfoContext),
108 .inputs = avfilter_vf_showinfo_inputs,
110 .outputs = avfilter_vf_showinfo_outputs,