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https://github.com/FFmpeg/FFmpeg.git
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a5e8c41c28
It is not used in any filters currently and is inherently evil. If passing binary data to filters is required in the future, it should be done with some AVOptions-based system.
101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
/*
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* Copyright (c) 2011 Stefano Sabatini
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* filter for showing textual video frame information
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*/
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#include "libavutil/adler32.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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typedef struct {
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unsigned int frame;
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} ShowInfoContext;
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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ShowInfoContext *showinfo = ctx->priv;
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showinfo->frame = 0;
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return 0;
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}
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static void end_frame(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ShowInfoContext *showinfo = ctx->priv;
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AVFilterBufferRef *picref = inlink->cur_buf;
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uint32_t plane_checksum[4] = {0}, checksum = 0;
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int i, plane, vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
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for (plane = 0; picref->data[plane] && plane < 4; plane++) {
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size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane);
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uint8_t *data = picref->data[plane];
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int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
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for (i = 0; i < h; i++) {
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plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
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checksum = av_adler32_update(checksum, data, linesize);
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data += picref->linesize[plane];
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}
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}
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av_log(ctx, AV_LOG_INFO,
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"n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" "
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"fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
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"checksum:%u plane_checksum:[%u %u %u %u]\n",
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showinfo->frame,
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picref->pts, picref->pts * av_q2d(inlink->time_base), picref->pos,
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av_pix_fmt_descriptors[picref->format].name,
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picref->video->pixel_aspect.num, picref->video->pixel_aspect.den,
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picref->video->w, picref->video->h,
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!picref->video->interlaced ? 'P' : /* Progressive */
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picref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
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picref->video->key_frame,
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av_get_picture_type_char(picref->video->pict_type),
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checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]);
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showinfo->frame++;
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ff_end_frame(inlink->dst->outputs[0]);
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}
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AVFilter avfilter_vf_showinfo = {
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.name = "showinfo",
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.description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
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.priv_size = sizeof(ShowInfoContext),
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.init = init,
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.get_video_buffer = ff_null_get_video_buffer,
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.start_frame = ff_null_start_frame,
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.end_frame = end_frame,
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.min_perms = AV_PERM_READ, },
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO },
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{ .name = NULL}},
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};
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