Statistics
| Branch: | Revision:

ffmpeg / libavfilter / vf_showinfo.c @ 35fe66ab

History | View | Annotate | Download (3.48 KB)

1
/*
2
 * Copyright (c) 2011 Stefano Sabatini
3
 * This file is part of FFmpeg.
4
 *
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.
9
 *
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.
14
 *
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
18
 */
19

    
20
/**
21
 * @file
22
 * filter fow showing textual video frame information
23
 */
24

    
25
#include "libavutil/adler32.h"
26
#include "libavutil/imgutils.h"
27
#include "libavutil/pixdesc.h"
28
#include "avfilter.h"
29

    
30
typedef struct {
31
    unsigned int frame;
32
} ShowInfoContext;
33

    
34
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
35
{
36
    ShowInfoContext *showinfo = ctx->priv;
37
    showinfo->frame = 0;
38
    return 0;
39
}
40

    
41
static void end_frame(AVFilterLink *inlink)
42
{
43
    AVFilterContext *ctx = inlink->dst;
44
    ShowInfoContext *showinfo = ctx->priv;
45
    AVFilterBufferRef *picref = inlink->cur_buf;
46
    uint32_t plane_crc[4], crc = 0;
47
    int plane;
48

    
49
    for (plane = 0; plane < 4; plane++) {
50
        size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane);
51
        plane_crc[plane] = av_adler32_update(0  , picref->data[plane], linesize);
52
        crc              = av_adler32_update(crc, picref->data[plane], linesize);
53
    }
54

    
55
    av_log(ctx, AV_LOG_INFO,
56
           "n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" "
57
           "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
58
           "crc:%u plane_crc:[%u %u %u %u]\n",
59
           showinfo->frame,
60
           picref->pts, picref ->pts * av_q2d(inlink->time_base), picref->pos,
61
           av_pix_fmt_descriptors[picref->format].name,
62
           picref->video->sample_aspect_ratio.num, picref->video->sample_aspect_ratio.den,
63
           picref->video->w, picref->video->h,
64
           !picref->video->interlaced     ? 'P' :         /* Progressive  */
65
           picref->video->top_field_first ? 'T' : 'B',    /* Top / Bottom */
66
           picref->video->key_frame,
67
           av_get_picture_type_char(picref->video->pict_type),
68
           crc, plane_crc[0], plane_crc[1], plane_crc[2], plane_crc[3]);
69

    
70
    showinfo->frame++;
71
    avfilter_end_frame(inlink->dst->outputs[0]);
72
}
73

    
74
AVFilter avfilter_vf_showinfo = {
75
    .name        = "showinfo",
76
    .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
77

    
78
    .priv_size = sizeof(ShowInfoContext),
79
    .init      = init,
80

    
81
    .inputs    = (AVFilterPad[]) {{ .name = "default",
82
                                    .type             = AVMEDIA_TYPE_VIDEO,
83
                                    .get_video_buffer = avfilter_null_get_video_buffer,
84
                                    .start_frame      = avfilter_null_start_frame,
85
                                    .end_frame        = end_frame,
86
                                    .min_perms       = AV_PERM_READ, },
87
                                  { .name = NULL}},
88

    
89
    .outputs   = (AVFilterPad[]) {{ .name             = "default",
90
                                    .type             = AVMEDIA_TYPE_VIDEO },
91
                                  { .name = NULL}},
92
};