| /* |
| * Copyright (c) 2011 Stefano Sabatini |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * filter for showing textual video frame information |
| */ |
| |
| #include "libavutil/adler32.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| |
| typedef struct { |
| unsigned int frame; |
| } ShowInfoContext; |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| ShowInfoContext *showinfo = ctx->priv; |
| showinfo->frame = 0; |
| return 0; |
| } |
| |
| static void end_frame(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| ShowInfoContext *showinfo = ctx->priv; |
| AVFilterBufferRef *picref = inlink->cur_buf; |
| uint32_t plane_checksum[4] = {0}, checksum = 0; |
| int i, plane, vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h; |
| |
| for (plane = 0; picref->data[plane] && plane < 4; plane++) { |
| size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane); |
| uint8_t *data = picref->data[plane]; |
| int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h; |
| |
| for (i = 0; i < h; i++) { |
| plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize); |
| checksum = av_adler32_update(checksum, data, linesize); |
| data += picref->linesize[plane]; |
| } |
| } |
| |
| av_log(ctx, AV_LOG_INFO, |
| "n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" " |
| "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c " |
| "checksum:%08X plane_checksum:[%08X %08X %08X %08X]\n", |
| showinfo->frame, |
| picref->pts, picref ->pts * av_q2d(inlink->time_base), picref->pos, |
| av_pix_fmt_descriptors[picref->format].name, |
| picref->video->sample_aspect_ratio.num, picref->video->sample_aspect_ratio.den, |
| picref->video->w, picref->video->h, |
| !picref->video->interlaced ? 'P' : /* Progressive */ |
| picref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */ |
| picref->video->key_frame, |
| av_get_picture_type_char(picref->video->pict_type), |
| checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]); |
| |
| showinfo->frame++; |
| avfilter_end_frame(inlink->dst->outputs[0]); |
| } |
| |
| AVFilter avfilter_vf_showinfo = { |
| .name = "showinfo", |
| .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."), |
| |
| .priv_size = sizeof(ShowInfoContext), |
| .init = init, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .get_video_buffer = avfilter_null_get_video_buffer, |
| .start_frame = avfilter_null_start_frame, |
| .end_frame = end_frame, |
| .min_perms = AV_PERM_READ, }, |
| { .name = NULL}}, |
| |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO }, |
| { .name = NULL}}, |
| }; |