diff options
Diffstat (limited to 'libavfilter/vf_showinfo.c')
-rw-r--r-- | libavfilter/vf_showinfo.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c new file mode 100644 index 0000000..82aa3b9 --- /dev/null +++ b/libavfilter/vf_showinfo.c @@ -0,0 +1,98 @@ +/* + * 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 fow 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:%u plane_checksum:[%u %u %u %u]\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 = (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 = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO }, + { .name = NULL}}, +}; |