yading@10: /*
yading@10:  * Copyright (c) 2011 Stefano Sabatini
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * filter for showing textual video frame information
yading@10:  */
yading@10: 
yading@10: #include "libavutil/adler32.h"
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "libavutil/internal.h"
yading@10: #include "libavutil/pixdesc.h"
yading@10: #include "libavutil/timestamp.h"
yading@10: #include "avfilter.h"
yading@10: #include "internal.h"
yading@10: #include "video.h"
yading@10: 
yading@10: typedef struct {
yading@10:     unsigned int frame;
yading@10: } ShowInfoContext;
yading@10: 
yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
yading@10: {
yading@10:     AVFilterContext *ctx = inlink->dst;
yading@10:     ShowInfoContext *showinfo = ctx->priv;
yading@10:     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
yading@10:     uint32_t plane_checksum[4] = {0}, checksum = 0;
yading@10:     int i, plane, vsub = desc->log2_chroma_h;
yading@10: 
yading@10:     for (plane = 0; plane < 4 && frame->data[plane]; plane++) {
yading@10:         int64_t linesize = av_image_get_linesize(frame->format, frame->width, plane);
yading@10:         uint8_t *data = frame->data[plane];
yading@10:         int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
yading@10: 
yading@10:         if (linesize < 0)
yading@10:             return linesize;
yading@10: 
yading@10:         for (i = 0; i < h; i++) {
yading@10:             plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
yading@10:             checksum = av_adler32_update(checksum, data, linesize);
yading@10:             data += frame->linesize[plane];
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     av_log(ctx, AV_LOG_INFO,
yading@10:            "n:%d pts:%s pts_time:%s pos:%"PRId64" "
yading@10:            "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
yading@10:            "checksum:%08X plane_checksum:[%08X",
yading@10:            showinfo->frame,
yading@10:            av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base), av_frame_get_pkt_pos(frame),
yading@10:            desc->name,
yading@10:            frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,
yading@10:            frame->width, frame->height,
yading@10:            !frame->interlaced_frame ? 'P' :         /* Progressive  */
yading@10:            frame->top_field_first   ? 'T' : 'B',    /* Top / Bottom */
yading@10:            frame->key_frame,
yading@10:            av_get_picture_type_char(frame->pict_type),
yading@10:            checksum, plane_checksum[0]);
yading@10: 
yading@10:     for (plane = 1; plane < 4 && frame->data[plane]; plane++)
yading@10:         av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
yading@10:     av_log(ctx, AV_LOG_INFO, "]\n");
yading@10: 
yading@10:     showinfo->frame++;
yading@10:     return ff_filter_frame(inlink->dst->outputs[0], frame);
yading@10: }
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
yading@10:     {
yading@10:         .name             = "default",
yading@10:         .type             = AVMEDIA_TYPE_VIDEO,
yading@10:         .get_video_buffer = ff_null_get_video_buffer,
yading@10:         .filter_frame     = filter_frame,
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
yading@10:     {
yading@10:         .name = "default",
yading@10:         .type = AVMEDIA_TYPE_VIDEO
yading@10:     },
yading@10:     { NULL }
yading@10: };
yading@10: 
yading@10: AVFilter avfilter_vf_showinfo = {
yading@10:     .name        = "showinfo",
yading@10:     .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
yading@10: 
yading@10:     .priv_size = sizeof(ShowInfoContext),
yading@10: 
yading@10:     .inputs    = avfilter_vf_showinfo_inputs,
yading@10: 
yading@10:     .outputs   = avfilter_vf_showinfo_outputs,
yading@10: };