/* * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * misc parsing utilities */ #include <time.h> #include "avstring.h"#include "avutil.h"#include "common.h"#include "eval.h"#include "log.h"#include "random_seed.h"#include "time_internal.h"#include "parseutils.h" typedef struct VideoSizeAbbr {    const char *abbr;    int width, height;} VideoSizeAbbr; typedef struct VideoRateAbbr {    const char *abbr;    AVRational rate;} VideoRateAbbr; static const VideoSizeAbbr video_size_abbrs[] = {    { "ntsc",      720, 480 },    { "pal",       720, 576 },    { "qntsc",     352, 240 }, /* VCD compliant NTSC */    { "qpal",      352, 288 }, /* VCD compliant PAL */    { "sntsc",     640, 480 }, /* square pixel NTSC */    { "spal",      768, 576 }, /* square pixel PAL */    { "film",      352, 240 },    { "ntsc-film", 352, 240 },    { "sqcif",     128,  96 },    { "qcif",      176, 144 },    { "cif",       352, 288 },    { "4cif",      704, 576 },    { "16cif",    1408,1152 },    { "qqvga",     160, 120 },    { "qvga",      320, 240 },    { "vga",       640, 480 },    { "svga",      800, 600 },    { "xga",      1024, 768 },    { "uxga",     1600,1200 },    { "qxga",     2048,1536 },    { "sxga",     1280,1024 },    { "qsxga",    2560,2048 },    { "hsxga",    5120,4096 },    { "wvga",      852, 480 },    { "wxga",     1366, 768 },    { "wsxga",    1600,1024 },    { "wuxga",    1920,1200 },    { "woxga",    2560,1600 },    { "wqsxga",   3200,2048 },    { "wquxga",   3840,2400 },    { "whsxga",   6400,4096 },    { "whuxga",   7680,4800 },    { "cga",       320, 200 },    { "ega",       640, 350 },    { "hd480",     852, 480 },    { "hd720",    1280, 720 },    { "hd1080",   1920,1080 },}; static const VideoRateAbbr video_rate_abbrs[]= {    { "ntsc",      { 30000, 1001 } },    { "pal",       {    25,    1 } },    { "qntsc",     { 30000, 1001 } }, /* VCD compliant NTSC */    { "qpal",      {    25,    1 } }, /* VCD compliant PAL */    { "sntsc",     { 30000, 1001 } }, /* square pixel NTSC */    { "spal",      {    25,    1 } }, /* square pixel PAL */    { "film",      {    24,    1 } },    { "ntsc-film", { 24000, 1001 } },}; int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str){    int i;    int n = FF_ARRAY_ELEMS(video_size_abbrs);    char *p;    int width = 0, height = 0;     for (i = 0; i < n; i++) {        if (!strcmp(video_size_abbrs[i].abbr, str)) {            width  = video_size_abbrs[i].width;            height = video_size_abbrs[i].height;            break;        }    }    if (i == n) {        width = strtol(str, &p, 10);        if (*p)            p++;        height = strtol(p, &p, 10);    }    if (width <= 0 || height <= 0)        return AVERROR(EINVAL);    *width_ptr  = width;    *height_ptr = height;    return 0;} int av_parse_video_rate(AVRational *rate, const char *arg){    int i, ret;    int n = FF_ARRAY_ELEMS(video_rate_abbrs);    double res;     /* First, we check our abbreviation table */    for (i = 0; i < n; ++i)        if (!strcmp(video_rate_abbrs[i].abbr, arg)) {            *rate = video_rate_abbrs[i].rate;            return 0;        }     /* Then, we try to parse it as fraction */    if ((ret = av_expr_parse_and_eval(&res, arg, NULL, NULL, NULL, NULL, NULL, NULL,                                      NULL, 0, NULL)) < 0)        return ret;    *rate = av_d2q(res, 1001000);    if (rate->num <= 0 || rate->den <= 0)        return AVERROR(EINVAL);    return 0;} typedef struct ColorEntry {    const char *name;            ///< a string representing the name of the color    uint8_t     rgb_color[3];    ///< RGB values for the color} ColorEntry; static ColorEntry color_table[] = {    { "AliceBlue",            { 0xF0, 0xF8, 0xFF } },    { "AntiqueWhite",         { 0xFA, 0xEB, 0xD7 } },    { "Aqua",                 { 0x00, 0xFF, 0xFF } },    { "Aquamarine",           { 0x7F, 0xFF, 0xD4 } },    { "Azure",                { 0xF0, 0xFF, 0xFF } },    { "Beige",                { 0xF5, 0xF5, 0xDC } },    { "Bisque",               { 0xFF, 0xE4, 0xC4 } },    { "Black",                { 0x00, 0x00, 0x00 } },    { "BlanchedAlmond",       { 0xFF, 0xEB, 0xCD } },    { "Blue",                 { 0x00, 0x00, 0xFF } },    { "BlueViolet",           { 0x8A, 0x2B, 0xE2 } },    { "Brown",                { 0xA5, 0x2A, 0x2A } },    { "BurlyWood",            { 0xDE, 0xB8, 0x87 } },    { "CadetBlue",            { 0x5F, 0x9E, 0xA0 } },    { "Chartreuse",           { 0x7F, 0xFF, 0x00 } },    { "Chocolate",            { 0xD2, 0x69, 0x1E } },    { "Coral",                { 0xFF, 0x7F, 0x50 } },    { "CornflowerBlue",       { 0x64, 0x95, 0xED } },    { "Cornsilk",             { 0xFF, 0xF8, 0xDC } },    { "Crimson",              { 0xDC, 0x14, 0x3C } },    { "Cyan",                 { 0x00, 0xFF, 0xFF } },    { "DarkBlue",             { 0x00, 0x00, 0x8B } },    { "DarkCyan",             { 0x00, 0x8B, 0x8B } },    { "DarkGoldenRod",        { 0xB8, 0x86, 0x0B } },    { "DarkGray",             { 0xA9, 0xA9, 0xA9 } },    { "DarkGreen",            { 0x00, 0x64, 0x00 } },    { "DarkKhaki",            { 0xBD, 0xB7, 0x6B } },    { "DarkMagenta",          { 0x8B, 0x00, 0x8B } },    { "DarkOliveGreen",       { 0x55, 0x6B, 0x2F } },    { "Darkorange",           { 0xFF, 0x8C, 0x00 } },    { "DarkOrchid",           { 0x99, 0x32, 0xCC } },    { "DarkRed",              { 0x8B, 0x00, 0x00 } },    { "DarkSalmon",           { 0xE9, 0x96, 0x7A } },    { "DarkSeaGreen",         { 0x8F, 0xBC, 0x8F } },    { "DarkSlateBlue",        { 0x48, 0x3D, 0x8B } },    { "DarkSlateGray",        { 0x2F, 0x4F, 0x4F } },    { "DarkTurquoise",        { 0x00, 0xCE, 0xD1 } },    { "DarkViolet",           { 0x94, 0x00, 0xD3 } },    { "DeepPink",             { 0xFF, 0x14, 0x93 } },    { "DeepSkyBlue",          { 0x00, 0xBF, 0xFF } },    { "DimGray",              { 0x69, 0x69, 0x69 } },    { "DodgerBlue",           { 0x1E, 0x90, 0xFF } },    { "FireBrick",            { 0xB2, 0x22, 0x22 } },    { "FloralWhite",          { 0xFF, 0xFA, 0xF0 } },    { "ForestGreen",          { 0x22, 0x8B, 0x22 } },    { "Fuchsia",              { 0xFF, 0x00, 0xFF } },    { "Gainsboro",            { 0xDC, 0xDC, 0xDC } },    { "GhostWhite",           { 0xF8, 0xF8, 0xFF } },    { "Gold",                 { 0xFF, 0xD7, 0x00 } },    { "GoldenRod",            { 0xDA, 0xA5, 0x20 } },    { "Gray",                 { 0x80, 0x80, 0x80 } },    { "Green",                { 0x00, 0x80, 0x00 } },    { "GreenYellow",          { 0xAD, 0xFF, 0x2F } },    { "HoneyDew",             { 0xF0, 0xFF, 0xF0 } },    { "HotPink",              { 0xFF, 0x69, 0xB4 } },    { "IndianRed",            { 0xCD, 0x5C, 0x5C } },    { "Indigo",               { 0x4B, 0x00, 0x82 } },    { "Ivory",                { 0xFF, 0xFF, 0xF0 } },    { "Khaki",                { 0xF0, 0xE6, 0x8C } },    { "Lavender",             { 0xE6, 0xE6, 0xFA } },    { "LavenderBlush",        { 0xFF, 0xF0, 0xF5 } },    { "LawnGreen",            { 0x7C, 0xFC, 0x00 } },    { "LemonChiffon",         { 0xFF, 0xFA, 0xCD } },    { "LightBlue",            { 0xAD, 0xD8, 0xE6 } },    { "LightCoral",           { 0xF0, 0x80, 0x80 } },    { "LightCyan",            { 0xE0, 0xFF, 0xFF } },    { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } },    { "LightGrey",            { 0xD3, 0xD3, 0xD3 } },    { "LightGreen",           { 0x90, 0xEE, 0x90 } },    { "LightPink",            { 0xFF, 0xB6, 0xC1 } },    { "LightSalmon",          { 0xFF, 0xA0, 0x7A } },    { "LightSeaGreen",        { 0x20, 0xB2, 0xAA } },    { "LightSkyBlue",         { 0x87, 0xCE, 0xFA } },    { "LightSlateGray",       { 0x77, 0x88, 0x99 } },    { "LightSteelBlue",       { 0xB0, 0xC4, 0xDE } },    { "LightYellow",          { 0xFF, 0xFF, 0xE0 } },    { "Lime",                 { 0x00, 0xFF, 0x00 } },    { "LimeGreen",            { 0x32, 0xCD, 0x32 } },    { "Linen",                { 0xFA, 0xF0, 0xE6 } },    { "Magenta",              { 0xFF, 0x00, 0xFF } },    { "Maroon",               { 0x80, 0x00, 0x00 } },    { "MediumAquaMarine",     { 0x66, 0xCD, 0xAA } },    { "MediumBlue",           { 0x00, 0x00, 0xCD } },    { "MediumOrchid",         { 0xBA, 0x55, 0xD3 } },    { "MediumPurple",         { 0x93, 0x70, 0xD8 } },    { "MediumSeaGreen",       { 0x3C, 0xB3, 0x71 } },    { "MediumSlateBlue",      { 0x7B, 0x68, 0xEE } },    { "MediumSpringGreen",    { 0x00, 0xFA, 0x9A } },    { "MediumTurquoise",      { 0x48, 0xD1, 0xCC } },    { "MediumVioletRed",      { 0xC7, 0x15, 0x85 } },    { "MidnightBlue",         { 0x19, 0x19, 0x70 } },    { "MintCream",            { 0xF5, 0xFF, 0xFA } },    { "MistyRose",            { 0xFF, 0xE4, 0xE1 } },    { "Moccasin",             { 0xFF, 0xE4, 0xB5 } },    { "NavajoWhite",          { 0xFF, 0xDE, 0xAD } },    { "Navy",                 { 0x00, 0x00, 0x80 } },    { "OldLace",              { 0xFD, 0xF5, 0xE6 } },    { "Olive",                { 0x80, 0x80, 0x00 } },    { "OliveDrab",            { 0x6B, 0x8E, 0x23 } },    { "Orange",               { 0xFF, 0xA5, 0x00 } },    { "OrangeRed",            { 0xFF, 0x45, 0x00 } },    { "Orchid",               { 0xDA, 0x70, 0xD6 } },    { "PaleGoldenRod",        { 0xEE, 0xE8, 0xAA } },    { "PaleGreen",            { 0x98, 0xFB, 0x98 } },    { "PaleTurquoise",        { 0xAF, 0xEE, 0xEE } },    { "PaleVioletRed",        { 0xD8, 0x70, 0x93 } },    { "PapayaWhip",           { 0xFF, 0xEF, 0xD5 } },    { "PeachPuff",            { 0xFF, 0xDA, 0xB9 } },    { "Peru",                 { 0xCD, 0x85, 0x3F } },    { "Pink",                 { 0xFF, 0xC0, 0xCB } },    { "Plum",                 { 0xDD, 0xA0, 0xDD } },    { "PowderBlue",           { 0xB0, 0xE0, 0xE6 } },    { "Purple",               { 0x80, 0x00, 0x80 } },    { "Red",                  { 0xFF, 0x00, 0x00 } },    { "RosyBrown",            { 0xBC, 0x8F, 0x8F } },    { "RoyalBlue",            { 0x41, 0x69, 0xE1 } },    { "SaddleBrown",          { 0x8B, 0x45, 0x13 } },    { "Salmon",               { 0xFA, 0x80, 0x72 } },    { "SandyBrown",           { 0xF4, 0xA4, 0x60 } },    { "SeaGreen",             { 0x2E, 0x8B, 0x57 } },    { "SeaShell",             { 0xFF, 0xF5, 0xEE } },    { "Sienna",               { 0xA0, 0x52, 0x2D } },    { "Silver",               { 0xC0, 0xC0, 0xC0 } },    { "SkyBlue",              { 0x87, 0xCE, 0xEB } },    { "SlateBlue",            { 0x6A, 0x5A, 0xCD } },    { "SlateGray",            { 0x70, 0x80, 0x90 } },    { "Snow",                 { 0xFF, 0xFA, 0xFA } },    { "SpringGreen",          { 0x00, 0xFF, 0x7F } },    { "SteelBlue",            { 0x46, 0x82, 0xB4 } },    { "Tan",                  { 0xD2, 0xB4, 0x8C } },    { "Teal",                 { 0x00, 0x80, 0x80 } },    { "Thistle",              { 0xD8, 0xBF, 0xD8 } },    { "Tomato",               { 0xFF, 0x63, 0x47 } },    { "Turquoise",            { 0x40, 0xE0, 0xD0 } },    { "Violet",               { 0xEE, 0x82, 0xEE } },    { "Wheat",                { 0xF5, 0xDE, 0xB3 } },    { "White",                { 0xFF, 0xFF, 0xFF } },    { "WhiteSmoke",           { 0xF5, 0xF5, 0xF5 } },    { "Yellow",               { 0xFF, 0xFF, 0x00 } },    { "YellowGreen",          { 0x9A, 0xCD, 0x32 } },}; static int color_table_compare(const void *lhs, const void *rhs){    return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);} #define ALPHA_SEP '@' int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,                   void *log_ctx){    char *tail, color_string2[128];    const ColorEntry *entry;    int len, hex_offset = 0;     if (color_string[0] == '#') {        hex_offset = 1;    } else if (!strncmp(color_string, "0x", 2))        hex_offset = 2;     if (slen < 0)        slen = strlen(color_string);    av_strlcpy(color_string2, color_string + hex_offset,               FFMIN(slen-hex_offset+1, sizeof(color_string2)));    if ((tail = strchr(color_string2, ALPHA_SEP)))        *tail++ = 0;    len = strlen(color_string2);    rgba_color[3] = 255;     if (!av_strcasecmp(color_string2, "random") || !av_strcasecmp(color_string2, "bikeshed")) {        int rgba = av_get_random_seed();        rgba_color[0] = rgba >> 24;        rgba_color[1] = rgba >> 16;        rgba_color[2] = rgba >> 8;        rgba_color[3] = rgba;    } else if (hex_offset ||               strspn(color_string2, "0123456789ABCDEFabcdef") == len) {        char *tail;        unsigned int rgba = strtoul(color_string2, &tail, 16);         if (*tail || (len != 6 && len != 8)) {            av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2);            return AVERROR(EINVAL);        }        if (len == 8) {            rgba_color[3] = rgba;            rgba >>= 8;        }        rgba_color[0] = rgba >> 16;        rgba_color[1] = rgba >> 8;        rgba_color[2] = rgba;    } else {        entry = bsearch(color_string2,                        color_table,                        FF_ARRAY_ELEMS(color_table),                        sizeof(ColorEntry),                        color_table_compare);        if (!entry) {            av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2);            return AVERROR(EINVAL);        }        memcpy(rgba_color, entry->rgb_color, 3);    }     if (tail) {        double alpha;        const char *alpha_string = tail;        if (!strncmp(alpha_string, "0x", 2)) {            alpha = strtoul(alpha_string, &tail, 16);        } else {            alpha = 255 * strtod(alpha_string, &tail);        }         if (tail == alpha_string || *tail || alpha > 255 || alpha < 0) {            av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n",                   alpha_string, color_string);            return AVERROR(EINVAL);        }        rgba_color[3] = alpha;    }     return 0;} /* get a positive number between n_min and n_max, for a maximum length   of len_max. Return -1 if error. */static int date_get_num(const char **pp,                        int n_min, int n_max, int len_max){    int i, val, c;    const char *p;     p = *pp;    val = 0;    for(i = 0; i < len_max; i++) {        c = *p;        if (!av_isdigit(c))            break;        val = (val * 10) + c - '0';        p++;    }    /* no number read ? */    if (p == *pp)        return -1;    if (val < n_min || val > n_max)        return -1;    *pp = p;    return val;} const char *av_small_strptime(const char *p, const char *fmt, struct tm *dt){    int c, val;     while((c = *fmt++)) {        if (c != '%') {            if (av_isspace(c))                for (; *p && av_isspace(*p); p++);            else if (*p != c)                return NULL;            else p++;            continue;        }         c = *fmt++;        switch(c) {        case 'H':            val = date_get_num(&p, 0, 23, 2);            if (val == -1)                return NULL;            dt->tm_hour = val;            break;        case 'M':            val = date_get_num(&p, 0, 59, 2);            if (val == -1)                return NULL;            dt->tm_min = val;            break;        case 'S':            val = date_get_num(&p, 0, 59, 2);            if (val == -1)                return NULL;            dt->tm_sec = val;            break;        case 'Y':            val = date_get_num(&p, 0, 9999, 4);            if (val == -1)                return NULL;            dt->tm_year = val - 1900;            break;        case 'm':            val = date_get_num(&p, 1, 12, 2);            if (val == -1)                return NULL;            dt->tm_mon = val - 1;            break;        case 'd':            val = date_get_num(&p, 1, 31, 2);            if (val == -1)                return NULL;            dt->tm_mday = val;            break;        case 'T':            p = av_small_strptime(p, "%H:%M:%S", dt);            if (!p)                return NULL;            break;        case '%':            if (*p++ != '%')                return NULL;            break;        default:            return NULL;        }    }     return p;} time_t av_timegm(struct tm *tm){    time_t t;     int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;     if (m < 3) {        m += 12;        y--;    }     t = 86400 *        (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);     t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;     return t;} int av_parse_time(int64_t *timeval, const char *timestr, int duration){    const char *p;    int64_t t;    struct tm dt = { 0 }, tmbuf;    int i;    static const char * const date_fmt[] = {        "%Y-%m-%d",        "%Y%m%d",    };

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