99 lines
3.8 KiB
C
99 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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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, void *opaque)
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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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avfilter_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 = avfilter_null_get_video_buffer,
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.start_frame = avfilter_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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