2 * Copyright (c) 2011 Stefano Sabatini
3 * This file is part of Libav.
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.
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.
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
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"
37 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
39 AVFilterContext *ctx = inlink->dst;
40 ShowInfoContext *showinfo = ctx->priv;
41 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
42 uint32_t plane_checksum[4] = {0}, checksum = 0;
43 int i, plane, vsub = desc->log2_chroma_h;
45 for (plane = 0; frame->data[plane] && plane < 4; plane++) {
46 size_t linesize = av_image_get_linesize(frame->format, frame->width, plane);
47 uint8_t *data = frame->data[plane];
48 int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
50 for (i = 0; i < h; i++) {
51 plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
52 checksum = av_adler32_update(checksum, data, linesize);
53 data += frame->linesize[plane];
57 av_log(ctx, AV_LOG_INFO,
58 "n:%d pts:%"PRId64" pts_time:%f "
59 "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
60 "checksum:%u plane_checksum:[%u %u %u %u]\n",
62 frame->pts, frame->pts * av_q2d(inlink->time_base),
64 frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,
65 frame->width, frame->height,
66 !frame->interlaced_frame ? 'P' : /* Progressive */
67 frame->top_field_first ? 'T' : 'B', /* Top / Bottom */
69 av_get_picture_type_char(frame->pict_type),
70 checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]);
73 return ff_filter_frame(inlink->dst->outputs[0], frame);
76 static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
79 .type = AVMEDIA_TYPE_VIDEO,
80 .get_video_buffer = ff_null_get_video_buffer,
81 .filter_frame = filter_frame,
86 static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
89 .type = AVMEDIA_TYPE_VIDEO
94 AVFilter avfilter_vf_showinfo = {
96 .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
98 .priv_size = sizeof(ShowInfoContext),
100 .inputs = avfilter_vf_showinfo_inputs,
102 .outputs = avfilter_vf_showinfo_outputs,