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https://github.com/FFmpeg/FFmpeg.git
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e4a7b2177d
Filter private data is memset to 0 so there is no point in explicitly initing anything to 0.
104 lines
3.4 KiB
C
104 lines
3.4 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/internal.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 int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ShowInfoContext *showinfo = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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uint32_t plane_checksum[4] = {0}, checksum = 0;
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int i, plane, vsub = desc->log2_chroma_h;
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for (plane = 0; frame->data[plane] && plane < 4; plane++) {
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size_t linesize = av_image_get_linesize(frame->format, frame->width, plane);
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uint8_t *data = frame->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 += frame->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 "
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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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frame->pts, frame->pts * av_q2d(inlink->time_base),
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desc->name,
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frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,
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frame->width, frame->height,
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!frame->interlaced_frame ? 'P' : /* Progressive */
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frame->top_field_first ? 'T' : 'B', /* Top / Bottom */
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frame->key_frame,
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av_get_picture_type_char(frame->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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return ff_filter_frame(inlink->dst->outputs[0], frame);
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}
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static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
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{
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.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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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO
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},
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{ NULL }
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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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.inputs = avfilter_vf_showinfo_inputs,
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.outputs = avfilter_vf_showinfo_outputs,
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};
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