vf_showinfo.c 3.8 KB

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  1. /*
  2. * Copyright (c) 2011 Stefano Sabatini
  3. * This file is part of FFmpeg.
  4. *
  5. * FFmpeg is free software; you can redistribute it and/or
  6. * modify it under the terms of the GNU Lesser General Public
  7. * License as published by the Free Software Foundation; either
  8. * version 2.1 of the License, or (at your option) any later version.
  9. *
  10. * FFmpeg is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13. * Lesser General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU Lesser General Public
  16. * License along with FFmpeg; if not, write to the Free Software
  17. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18. */
  19. /**
  20. * @file
  21. * filter for showing textual video frame information
  22. */
  23. #include "libavutil/adler32.h"
  24. #include "libavutil/imgutils.h"
  25. #include "libavutil/pixdesc.h"
  26. #include "avfilter.h"
  27. typedef struct {
  28. unsigned int frame;
  29. } ShowInfoContext;
  30. static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
  31. {
  32. ShowInfoContext *showinfo = ctx->priv;
  33. showinfo->frame = 0;
  34. return 0;
  35. }
  36. static void end_frame(AVFilterLink *inlink)
  37. {
  38. AVFilterContext *ctx = inlink->dst;
  39. ShowInfoContext *showinfo = ctx->priv;
  40. AVFilterBufferRef *picref = inlink->cur_buf;
  41. uint32_t plane_checksum[4] = {0}, checksum = 0;
  42. int i, plane, vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
  43. for (plane = 0; picref->data[plane] && plane < 4; plane++) {
  44. size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane);
  45. uint8_t *data = picref->data[plane];
  46. int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
  47. for (i = 0; i < h; i++) {
  48. plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
  49. checksum = av_adler32_update(checksum, data, linesize);
  50. data += picref->linesize[plane];
  51. }
  52. }
  53. av_log(ctx, AV_LOG_INFO,
  54. "n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" "
  55. "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
  56. "checksum:%08X plane_checksum:[%08X %08X %08X %08X]\n",
  57. showinfo->frame,
  58. picref->pts, picref ->pts * av_q2d(inlink->time_base), picref->pos,
  59. av_pix_fmt_descriptors[picref->format].name,
  60. picref->video->sample_aspect_ratio.num, picref->video->sample_aspect_ratio.den,
  61. picref->video->w, picref->video->h,
  62. !picref->video->interlaced ? 'P' : /* Progressive */
  63. picref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
  64. picref->video->key_frame,
  65. av_get_picture_type_char(picref->video->pict_type),
  66. checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]);
  67. showinfo->frame++;
  68. avfilter_end_frame(inlink->dst->outputs[0]);
  69. }
  70. AVFilter avfilter_vf_showinfo = {
  71. .name = "showinfo",
  72. .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
  73. .priv_size = sizeof(ShowInfoContext),
  74. .init = init,
  75. .inputs = (const AVFilterPad[]) {{ .name = "default",
  76. .type = AVMEDIA_TYPE_VIDEO,
  77. .get_video_buffer = avfilter_null_get_video_buffer,
  78. .start_frame = avfilter_null_start_frame,
  79. .end_frame = end_frame,
  80. .min_perms = AV_PERM_READ, },
  81. { .name = NULL}},
  82. .outputs = (const AVFilterPad[]) {{ .name = "default",
  83. .type = AVMEDIA_TYPE_VIDEO },
  84. { .name = NULL}},
  85. };