falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99839 Commits
32 Branches
289MB
Tree: d5763edab2
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'd5763edab2'
${ noResults }
FFmpeg/libavfilter/vf_showinfo.c

478 lines
17KB
Raw Blame History 

  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. /**

  21.  * @file

  22.  * filter for showing textual video frame information

  23.  */

  24. 

  25. #include <inttypes.h>

  26. 

  27. #include "libavutil/bswap.h"

  28. #include "libavutil/adler32.h"

  29. #include "libavutil/display.h"

  30. #include "libavutil/imgutils.h"

  31. #include "libavutil/internal.h"

  32. #include "libavutil/opt.h"

  33. #include "libavutil/pixdesc.h"

  34. #include "libavutil/spherical.h"

  35. #include "libavutil/stereo3d.h"

  36. #include "libavutil/timestamp.h"

  37. #include "libavutil/timecode.h"

  38. #include "libavutil/mastering_display_metadata.h"

  39. #include "libavutil/video_enc_params.h"

  40. 

  41. #include "avfilter.h"

  42. #include "internal.h"

  43. #include "video.h"

  44. 

  45. typedef struct ShowInfoContext {

  46.     const AVClass *class;

  47.     int calculate_checksums;

  48. } ShowInfoContext;

  49. 

  50. #define OFFSET(x) offsetof(ShowInfoContext, x)

  51. #define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

  52. 

  53. static const AVOption showinfo_options[] = {

  54.     { "checksum", "calculate checksums", OFFSET(calculate_checksums), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, VF },

  55.     { NULL }

  56. };

  57. 

  58. AVFILTER_DEFINE_CLASS(showinfo);

  59. 

  60. static void dump_spherical(AVFilterContext *ctx, AVFrame *frame, const AVFrameSideData *sd)

  61. {

  62.     const AVSphericalMapping *spherical = (const AVSphericalMapping *)sd->data;

  63.     double yaw, pitch, roll;

  64. 

  65.     av_log(ctx, AV_LOG_INFO, "spherical information: ");

  66.     if (sd->size < sizeof(*spherical)) {

  67.         av_log(ctx, AV_LOG_ERROR, "invalid data\n");

  68.         return;

  69.     }

  70. 

  71.     if (spherical->projection == AV_SPHERICAL_EQUIRECTANGULAR)

  72.         av_log(ctx, AV_LOG_INFO, "equirectangular ");

  73.     else if (spherical->projection == AV_SPHERICAL_CUBEMAP)

  74.         av_log(ctx, AV_LOG_INFO, "cubemap ");

  75.     else if (spherical->projection == AV_SPHERICAL_EQUIRECTANGULAR_TILE)

  76.         av_log(ctx, AV_LOG_INFO, "tiled equirectangular ");

  77.     else {

  78.         av_log(ctx, AV_LOG_WARNING, "unknown\n");

  79.         return;

  80.     }

  81. 

  82.     yaw = ((double)spherical->yaw) / (1 << 16);

  83.     pitch = ((double)spherical->pitch) / (1 << 16);

  84.     roll = ((double)spherical->roll) / (1 << 16);

  85.     av_log(ctx, AV_LOG_INFO, "(%f/%f/%f) ", yaw, pitch, roll);

  86. 

  87.     if (spherical->projection == AV_SPHERICAL_EQUIRECTANGULAR_TILE) {

  88.         size_t l, t, r, b;

  89.         av_spherical_tile_bounds(spherical, frame->width, frame->height,

  90.                                  &l, &t, &r, &b);

  91.         av_log(ctx, AV_LOG_INFO,

  92.                "[%"SIZE_SPECIFIER", %"SIZE_SPECIFIER", %"SIZE_SPECIFIER", %"SIZE_SPECIFIER"] ",

  93.                l, t, r, b);

  94.     } else if (spherical->projection == AV_SPHERICAL_CUBEMAP) {

  95.         av_log(ctx, AV_LOG_INFO, "[pad %"PRIu32"] ", spherical->padding);

  96.     }

  97. }

  98. 

  99. static void dump_stereo3d(AVFilterContext *ctx, const AVFrameSideData *sd)

  100. {

  101.     const AVStereo3D *stereo;

  102. 

  103.     av_log(ctx, AV_LOG_INFO, "stereoscopic information: ");

  104.     if (sd->size < sizeof(*stereo)) {

  105.         av_log(ctx, AV_LOG_ERROR, "invalid data\n");

  106.         return;

  107.     }

  108. 

  109.     stereo = (const AVStereo3D *)sd->data;

  110. 

  111.     av_log(ctx, AV_LOG_INFO, "type - %s", av_stereo3d_type_name(stereo->type));

  112. 

  113.     if (stereo->flags & AV_STEREO3D_FLAG_INVERT)

  114.         av_log(ctx, AV_LOG_INFO, " (inverted)");

  115. }

  116. 

  117. static void dump_s12m_timecode(AVFilterContext *ctx, AVRational frame_rate, const AVFrameSideData *sd)

  118. {

  119.     const uint32_t *tc = (const uint32_t *)sd->data;

  120. 

  121.     if ((sd->size != sizeof(uint32_t) * 4) || (tc[0] > 3)) {

  122.         av_log(ctx, AV_LOG_ERROR, "invalid data\n");

  123.         return;

  124.     }

  125. 

  126.     for (int j = 1; j <= tc[0]; j++) {

  127.         char tcbuf[AV_TIMECODE_STR_SIZE];

  128.         av_timecode_make_smpte_tc_string2(tcbuf, frame_rate, tc[j], 0, 0);

  129.         av_log(ctx, AV_LOG_INFO, "timecode - %s%s", tcbuf, j != tc[0]  ? ", " : "");

  130.     }

  131. }

  132. 

  133. static void dump_roi(AVFilterContext *ctx, const AVFrameSideData *sd)

  134. {

  135.     int nb_rois;

  136.     const AVRegionOfInterest *roi;

  137.     uint32_t roi_size;

  138. 

  139.     roi = (const AVRegionOfInterest *)sd->data;

  140.     roi_size = roi->self_size;

  141.     if (!roi_size || sd->size % roi_size != 0) {

  142.         av_log(ctx, AV_LOG_ERROR, "Invalid AVRegionOfInterest.self_size.\n");

  143.         return;

  144.     }

  145.     nb_rois = sd->size / roi_size;

  146. 

  147.     av_log(ctx, AV_LOG_INFO, "Regions Of Interest(RoI) information: ");

  148.     for (int i = 0; i < nb_rois; i++) {

  149.         roi = (const AVRegionOfInterest *)(sd->data + roi_size * i);

  150.         av_log(ctx, AV_LOG_INFO, "index: %d, region: (%d, %d)/(%d, %d), qp offset: %d/%d.\n",

  151.                i, roi->left, roi->top, roi->right, roi->bottom, roi->qoffset.num, roi->qoffset.den);

  152.     }

  153. }

  154. 

  155. static void dump_mastering_display(AVFilterContext *ctx, const AVFrameSideData *sd)

  156. {

  157.     const AVMasteringDisplayMetadata *mastering_display;

  158. 

  159.     av_log(ctx, AV_LOG_INFO, "mastering display: ");

  160.     if (sd->size < sizeof(*mastering_display)) {

  161.         av_log(ctx, AV_LOG_ERROR, "invalid data\n");

  162.         return;

  163.     }

  164. 

  165.     mastering_display = (const AVMasteringDisplayMetadata *)sd->data;

  166. 

  167.     av_log(ctx, AV_LOG_INFO, "has_primaries:%d has_luminance:%d "

  168.            "r(%5.4f,%5.4f) g(%5.4f,%5.4f) b(%5.4f %5.4f) wp(%5.4f, %5.4f) "

  169.            "min_luminance=%f, max_luminance=%f",

  170.            mastering_display->has_primaries, mastering_display->has_luminance,

  171.            av_q2d(mastering_display->display_primaries[0][0]),

  172.            av_q2d(mastering_display->display_primaries[0][1]),

  173.            av_q2d(mastering_display->display_primaries[1][0]),

  174.            av_q2d(mastering_display->display_primaries[1][1]),

  175.            av_q2d(mastering_display->display_primaries[2][0]),

  176.            av_q2d(mastering_display->display_primaries[2][1]),

  177.            av_q2d(mastering_display->white_point[0]), av_q2d(mastering_display->white_point[1]),

  178.            av_q2d(mastering_display->min_luminance), av_q2d(mastering_display->max_luminance));

  179. }

  180. 

  181. static void dump_content_light_metadata(AVFilterContext *ctx, const AVFrameSideData *sd)

  182. {

  183.     const AVContentLightMetadata *metadata = (const AVContentLightMetadata *)sd->data;

  184. 

  185.     av_log(ctx, AV_LOG_INFO, "Content Light Level information: "

  186.            "MaxCLL=%d, MaxFALL=%d",

  187.            metadata->MaxCLL, metadata->MaxFALL);

  188. }

  189. 

  190. static void dump_video_enc_params(AVFilterContext *ctx, const AVFrameSideData *sd)

  191. {

  192.     const AVVideoEncParams *par = (const AVVideoEncParams *)sd->data;

  193.     int plane, acdc;

  194. 

  195.     av_log(ctx, AV_LOG_INFO, "video encoding parameters: type %d; ", par->type);

  196.     if (par->qp)

  197.         av_log(ctx, AV_LOG_INFO, "qp=%d; ", par->qp);

  198.     for (plane = 0; plane < FF_ARRAY_ELEMS(par->delta_qp); plane++)

  199.         for (acdc = 0; acdc < FF_ARRAY_ELEMS(par->delta_qp[plane]); acdc++) {

  200.             int delta_qp = par->delta_qp[plane][acdc];

  201.             if (delta_qp)

  202.                 av_log(ctx, AV_LOG_INFO, "delta_qp[%d][%d]=%d; ",

  203.                        plane, acdc, delta_qp);

  204.         }

  205.     if (par->nb_blocks)

  206.         av_log(ctx, AV_LOG_INFO, "%u blocks; ", par->nb_blocks);

  207. }

  208. 

  209. static void dump_sei_unregistered_metadata(AVFilterContext *ctx, const AVFrameSideData *sd)

  210. {

  211.     const int uuid_size = 16;

  212.     const uint8_t *user_data = sd->data;

  213.     int i;

  214. 

  215.     if (sd->size < uuid_size) {

  216.         av_log(ctx, AV_LOG_ERROR, "invalid data(%d < UUID(%d-bytes))\n", sd->size, uuid_size);

  217.         return;

  218.     }

  219. 

  220.     av_log(ctx, AV_LOG_INFO, "User Data Unregistered:\n");

  221.     av_log(ctx, AV_LOG_INFO, "UUID=");

  222.     for (i = 0; i < uuid_size; i++) {

  223.         av_log(ctx, AV_LOG_INFO, "%02x", user_data[i]);

  224.         if (i == 3 || i == 5 || i == 7 || i == 9)

  225.             av_log(ctx, AV_LOG_INFO, "-");

  226.     }

  227.     av_log(ctx, AV_LOG_INFO, "\n");

  228. 

  229.     av_log(ctx, AV_LOG_INFO, "User Data=");

  230.     for (; i < sd->size; i++) {

  231.         av_log(ctx, AV_LOG_INFO, "%02x", user_data[i]);

  232.     }

  233.     av_log(ctx, AV_LOG_INFO, "\n");

  234. }

  235. 

  236. static void dump_color_property(AVFilterContext *ctx, AVFrame *frame)

  237. {

  238.     const char *color_range_str     = av_color_range_name(frame->color_range);

  239.     const char *colorspace_str      = av_color_space_name(frame->colorspace);

  240.     const char *color_primaries_str = av_color_primaries_name(frame->color_primaries);

  241.     const char *color_trc_str       = av_color_transfer_name(frame->color_trc);

  242. 

  243.     if (!color_range_str || frame->color_range == AVCOL_RANGE_UNSPECIFIED) {

  244.         av_log(ctx, AV_LOG_INFO, "color_range:unknown");

  245.     } else {

  246.         av_log(ctx, AV_LOG_INFO, "color_range:%s", color_range_str);

  247.     }

  248. 

  249.     if (!colorspace_str || frame->colorspace == AVCOL_SPC_UNSPECIFIED) {

  250.         av_log(ctx, AV_LOG_INFO, " color_space:unknown");

  251.     } else {

  252.         av_log(ctx, AV_LOG_INFO, " color_space:%s", colorspace_str);

  253.     }

  254. 

  255.     if (!color_primaries_str || frame->color_primaries == AVCOL_PRI_UNSPECIFIED) {

  256.         av_log(ctx, AV_LOG_INFO, " color_primaries:unknown");

  257.     } else {

  258.         av_log(ctx, AV_LOG_INFO, " color_primaries:%s", color_primaries_str);

  259.     }

  260. 

  261.     if (!color_trc_str || frame->color_trc == AVCOL_TRC_UNSPECIFIED) {

  262.         av_log(ctx, AV_LOG_INFO, " color_trc:unknown");

  263.     } else {

  264.         av_log(ctx, AV_LOG_INFO, " color_trc:%s", color_trc_str);

  265.     }

  266.     av_log(ctx, AV_LOG_INFO, "\n");

  267. }

  268. 

  269. static void update_sample_stats_8(const uint8_t *src, int len, int64_t *sum, int64_t *sum2)

  270. {

  271.     int i;

  272. 

  273.     for (i = 0; i < len; i++) {

  274.         *sum += src[i];

  275.         *sum2 += src[i] * src[i];

  276.     }

  277. }

  278. 

  279. static void update_sample_stats_16(int be, const uint8_t *src, int len, int64_t *sum, int64_t *sum2)

  280. {

  281.     const uint16_t *src1 = (const uint16_t *)src;

  282.     int i;

  283. 

  284.     for (i = 0; i < len / 2; i++) {

  285.         if ((HAVE_BIGENDIAN && !be) || (!HAVE_BIGENDIAN && be)) {

  286.             *sum += av_bswap16(src1[i]);

  287.             *sum2 += (uint32_t)av_bswap16(src1[i]) * (uint32_t)av_bswap16(src1[i]);

  288.         } else {

  289.             *sum += src1[i];

  290.             *sum2 += (uint32_t)src1[i] * (uint32_t)src1[i];

  291.         }

  292.     }

  293. }

  294. 

  295. static void update_sample_stats(int depth, int be, const uint8_t *src, int len, int64_t *sum, int64_t *sum2)

  296. {

  297.     if (depth <= 8)

  298.         update_sample_stats_8(src, len, sum, sum2);

  299.     else

  300.         update_sample_stats_16(be, src, len, sum, sum2);

  301. }

  302. 

  303. static int filter_frame(AVFilterLink *inlink, AVFrame *frame)

  304. {

  305.     AVFilterContext *ctx = inlink->dst;

  306.     ShowInfoContext *s = ctx->priv;

  307.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);

  308.     uint32_t plane_checksum[4] = {0}, checksum = 0;

  309.     int64_t sum[4] = {0}, sum2[4] = {0};

  310.     int32_t pixelcount[4] = {0};

  311.     int bitdepth = desc->comp[0].depth;

  312.     int be = desc->flags & AV_PIX_FMT_FLAG_BE;

  313.     int i, plane, vsub = desc->log2_chroma_h;

  314. 

  315.     for (plane = 0; plane < 4 && s->calculate_checksums && frame->data[plane] && frame->linesize[plane]; plane++) {

  316.         uint8_t *data = frame->data[plane];

  317.         int h = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;

  318.         int linesize = av_image_get_linesize(frame->format, frame->width, plane);

  319.         int width = linesize >> (bitdepth > 8);

  320. 

  321.         if (linesize < 0)

  322.             return linesize;

  323. 

  324.         for (i = 0; i < h; i++) {

  325.             plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);

  326.             checksum = av_adler32_update(checksum, data, linesize);

  327. 

  328.             update_sample_stats(bitdepth, be, data, linesize, sum+plane, sum2+plane);

  329.             pixelcount[plane] += width;

  330.             data += frame->linesize[plane];

  331.         }

  332.     }

  333. 

  334.     av_log(ctx, AV_LOG_INFO,

  335.            "n:%4"PRId64" pts:%7s pts_time:%-7s pos:%9"PRId64" "

  336.            "fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c ",

  337.            inlink->frame_count_out,

  338.            av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base), frame->pkt_pos,

  339.            desc->name,

  340.            frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den,

  341.            frame->width, frame->height,

  342.            !frame->interlaced_frame ? 'P' :         /* Progressive  */

  343.            frame->top_field_first   ? 'T' : 'B',    /* Top / Bottom */

  344.            frame->key_frame,

  345.            av_get_picture_type_char(frame->pict_type));

  346. 

  347.     if (s->calculate_checksums) {

  348.         av_log(ctx, AV_LOG_INFO,

  349.                "checksum:%08"PRIX32" plane_checksum:[%08"PRIX32,

  350.                checksum, plane_checksum[0]);

  351. 

  352.         for (plane = 1; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++)

  353.             av_log(ctx, AV_LOG_INFO, " %08"PRIX32, plane_checksum[plane]);

  354.         av_log(ctx, AV_LOG_INFO, "] mean:[");

  355.         for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++)

  356.             av_log(ctx, AV_LOG_INFO, "%"PRId64" ", (sum[plane] + pixelcount[plane]/2) / pixelcount[plane]);

  357.         av_log(ctx, AV_LOG_INFO, "\b] stdev:[");

  358.         for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++)

  359.             av_log(ctx, AV_LOG_INFO, "%3.1f ",

  360.                    sqrt((sum2[plane] - sum[plane]*(double)sum[plane]/pixelcount[plane])/pixelcount[plane]));

  361.         av_log(ctx, AV_LOG_INFO, "\b]");

  362.     }

  363.     av_log(ctx, AV_LOG_INFO, "\n");

  364. 

  365.     for (i = 0; i < frame->nb_side_data; i++) {

  366.         AVFrameSideData *sd = frame->side_data[i];

  367. 

  368.         av_log(ctx, AV_LOG_INFO, "  side data - ");

  369.         switch (sd->type) {

  370.         case AV_FRAME_DATA_PANSCAN:

  371.             av_log(ctx, AV_LOG_INFO, "pan/scan");

  372.             break;

  373.         case AV_FRAME_DATA_A53_CC:

  374.             av_log(ctx, AV_LOG_INFO, "A/53 closed captions (%d bytes)", sd->size);

  375.             break;

  376.         case AV_FRAME_DATA_SPHERICAL:

  377.             dump_spherical(ctx, frame, sd);

  378.             break;

  379.         case AV_FRAME_DATA_STEREO3D:

  380.             dump_stereo3d(ctx, sd);

  381.             break;

  382.         case AV_FRAME_DATA_S12M_TIMECODE: {

  383.             dump_s12m_timecode(ctx, inlink->frame_rate, sd);

  384.             break;

  385.         }

  386.         case AV_FRAME_DATA_DISPLAYMATRIX:

  387.             av_log(ctx, AV_LOG_INFO, "displaymatrix: rotation of %.2f degrees",

  388.                    av_display_rotation_get((int32_t *)sd->data));

  389.             break;

  390.         case AV_FRAME_DATA_AFD:

  391.             av_log(ctx, AV_LOG_INFO, "afd: value of %"PRIu8, sd->data[0]);

  392.             break;

  393.         case AV_FRAME_DATA_REGIONS_OF_INTEREST:

  394.             dump_roi(ctx, sd);

  395.             break;

  396.         case AV_FRAME_DATA_MASTERING_DISPLAY_METADATA:

  397.             dump_mastering_display(ctx, sd);

  398.             break;

  399.         case AV_FRAME_DATA_CONTENT_LIGHT_LEVEL:

  400.             dump_content_light_metadata(ctx, sd);

  401.             break;

  402.         case AV_FRAME_DATA_GOP_TIMECODE: {

  403.             char tcbuf[AV_TIMECODE_STR_SIZE];

  404.             av_timecode_make_mpeg_tc_string(tcbuf, *(int64_t *)(sd->data));

  405.             av_log(ctx, AV_LOG_INFO, "GOP timecode - %s", tcbuf);

  406.             break;

  407.         }

  408.         case AV_FRAME_DATA_VIDEO_ENC_PARAMS:

  409.             dump_video_enc_params(ctx, sd);

  410.             break;

  411.         case AV_FRAME_DATA_SEI_UNREGISTERED:

  412.             dump_sei_unregistered_metadata(ctx, sd);

  413.             break;

  414.         default:

  415.             av_log(ctx, AV_LOG_WARNING, "unknown side data type %d (%d bytes)\n",

  416.                    sd->type, sd->size);

  417.             break;

  418.         }

  419. 

  420.         av_log(ctx, AV_LOG_INFO, "\n");

  421.     }

  422. 

  423.     dump_color_property(ctx, frame);

  424. 

  425.     return ff_filter_frame(inlink->dst->outputs[0], frame);

  426. }

  427. 

  428. static int config_props(AVFilterContext *ctx, AVFilterLink *link, int is_out)

  429. {

  430. 

  431.     av_log(ctx, AV_LOG_INFO, "config %s time_base: %d/%d, frame_rate: %d/%d\n",

  432.            is_out ? "out" : "in",

  433.            link->time_base.num, link->time_base.den,

  434.            link->frame_rate.num, link->frame_rate.den);

  435. 

  436.     return 0;

  437. }

  438. 

  439. static int config_props_in(AVFilterLink *link)

  440. {

  441.     AVFilterContext *ctx = link->dst;

  442.     return config_props(ctx, link, 0);

  443. }

  444. 

  445. static int config_props_out(AVFilterLink *link)

  446. {

  447.     AVFilterContext *ctx = link->src;

  448.     return config_props(ctx, link, 1);

  449. }

  450. 

  451. static const AVFilterPad avfilter_vf_showinfo_inputs[] = {

  452.     {

  453.         .name             = "default",

  454.         .type             = AVMEDIA_TYPE_VIDEO,

  455.         .filter_frame     = filter_frame,

  456.         .config_props     = config_props_in,

  457.     },

  458.     { NULL }

  459. };

  460. 

  461. static const AVFilterPad avfilter_vf_showinfo_outputs[] = {

  462.     {

  463.         .name = "default",

  464.         .type = AVMEDIA_TYPE_VIDEO,

  465.         .config_props  = config_props_out,

  466.     },

  467.     { NULL }

  468. };

  469. 

  470. AVFilter ff_vf_showinfo = {

  471.     .name        = "showinfo",

  472.     .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),

  473.     .inputs      = avfilter_vf_showinfo_inputs,

  474.     .outputs     = avfilter_vf_showinfo_outputs,

  475.     .priv_size   = sizeof(ShowInfoContext),

  476.     .priv_class  = &showinfo_class,

  477. };