Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 790 insertions, 0 deletions

diff --git a/media/ffvpx/libavutil/parseutils.c b/media/ffvpx/libavutil/parseutils.c
new file mode 100644
index 0000000000..c2916c458b
--- /dev/null
+++ b/media/ffvpx/libavutil/parseutils.c
@@ -0,0 +1,790 @@
+/*
+ * 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
+ * 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"
+#include "fftime.h"
+
+#ifdef TEST
+
+#define av_get_random_seed av_get_random_seed_deterministic
+static uint32_t av_get_random_seed_deterministic(void);
+
+#define av_gettime() 1331972053200000
+
+#endif
+
+int av_parse_ratio(AVRational *q, const char *str, int max,
+                   int log_offset, void *log_ctx)
+{
+    char c;
+    int ret;
+
+    if (sscanf(str, "%d:%d%c", &q->num, &q->den, &c) != 2) {
+        double d;
+        ret = av_expr_parse_and_eval(&d, str, NULL, NULL,
+                                     NULL, NULL, NULL, NULL,
+                                     NULL, log_offset, log_ctx);
+        if (ret < 0)
+            return ret;
+        *q = av_d2q(d, max);
+    } else {
+        av_reduce(&q->num, &q->den, q->num, q->den, max);
+    }
+
+    return 0;
+}
+
+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 },
+    { "wqhd",     2560,1440 },
+    { "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 },
+    { "quadhd",   2560,1440 },
+    { "2k",       2048,1080 }, /* Digital Cinema System Specification */
+    { "2kdci",    2048,1080 },
+    { "2kflat",   1998,1080 },
+    { "2kscope",  2048, 858 },
+    { "4k",       4096,2160 }, /* Digital Cinema System Specification */
+    { "4kdci",    4096,2160 },
+    { "4kflat",   3996,2160 },
+    { "4kscope",  4096,1716 },
+    { "nhd",       640,360  },
+    { "hqvga",     240,160  },
+    { "wqvga",     400,240  },
+    { "fwqvga",    432,240  },
+    { "hvga",      480,320  },
+    { "qhd",       960,540  },
+    { "uhd2160",  3840,2160 },
+    { "uhd4320",  7680,4320 },
+};
+
+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 } },
+};
+
+static const char *months[12] = {
+    "january", "february", "march", "april", "may", "june", "july", "august",
+    "september", "october", "november", "december"
+};
+
+int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
+{
+    int i;
+    int n = FF_ARRAY_ELEMS(video_size_abbrs);
+    const 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, (void*)&p, 10);
+        if (*p)
+            p++;
+        height = strtol(p, (void*)&p, 10);
+
+        /* trailing extraneous data detected, like in 123x345foobar */
+        if (*p)
+            return AVERROR(EINVAL);
+    }
+    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);
+
+    /* 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_parse_ratio_quiet(rate, arg, 1001000)) < 0)
+        return ret;
+    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 const 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 } },
+    { "LightGreen",           { 0x90, 0xEE, 0x90 } },
+    { "LightGrey",            { 0xD3, 0xD3, 0xD3 } },
+    { "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 = 0xffffffff; /* 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 {
+            double norm_alpha = strtod(alpha_string, &tail);
+            if (norm_alpha < 0.0 || norm_alpha > 1.0)
+                alpha = 256;
+            else
+                alpha = 255 * norm_alpha;
+        }
+
+        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;
+}
+
+const char *av_get_known_color_name(int color_idx, const uint8_t **rgbp)
+{
+    const ColorEntry *color;
+
+    if ((unsigned)color_idx >= FF_ARRAY_ELEMS(color_table))
+        return NULL;
+
+    color = &color_table[color_idx];
+    if (rgbp)
+        *rgbp = color->rgb_color;
+
+    return color->name;
+}
+
+/* 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;
+}
+
+static int date_get_month(const char **pp) {
+    int i = 0;
+    for (; i < 12; i++) {
+        if (!av_strncasecmp(*pp, months[i], 3)) {
+            const char *mo_full = months[i] + 3;
+            int len = strlen(mo_full);
+            *pp += 3;
+            if (len > 0 && !av_strncasecmp(*pp, mo_full, len))
+                *pp += len;
+            return i;
+        }
+    }
+    return -1;
+}
+
+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':
+        case 'J':
+            val = date_get_num(&p, 0, c == 'H' ? 23 : INT_MAX, c == 'H' ? 2 : 4);
+
+            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 'b':
+        case 'B':
+        case 'h':
+            val = date_get_month(&p);
+            if (val == -1)
+                return NULL;
+            dt->tm_mon = val;
+            break;
+        case '%':
+            if (*p++ != '%')
+                return NULL;
+            break;
+        default:
+            return NULL;
+        }
+    }
+
+    return (char*)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 = 86400LL *
+        (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, *q;
+    int64_t t, now64;
+    time_t now;
+    struct tm dt = { 0 }, tmbuf;
+    int today = 0, negative = 0, microseconds = 0, suffix = 1000000;
+    int i;
+    static const char * const date_fmt[] = {
+        "%Y - %m - %d",
+        "%Y%m%d",
+    };
+    static const char * const time_fmt[] = {
+        "%H:%M:%S",
+        "%H%M%S",
+    };
+    static const char * const tz_fmt[] = {
+        "%H:%M",
+        "%H%M",
+        "%H",
+    };
+
+    p = timestr;
+    q = NULL;
+    *timeval = INT64_MIN;
+    if (!duration) {
+        now64 = av_gettime();
+        now = now64 / 1000000;
+
+        if (!av_strcasecmp(timestr, "now")) {
+            *timeval = now64;
+            return 0;
+        }
+
+        /* parse the year-month-day part */
+        for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
+            q = av_small_strptime(p, date_fmt[i], &dt);
+            if (q)
+                break;
+        }
+
+        /* if the year-month-day part is missing, then take the
+         * current year-month-day time */
+        if (!q) {
+            today = 1;
+            q = p;
+        }
+        p = q;
+
+        if (*p == 'T' || *p == 't')
+            p++;
+        else
+            while (av_isspace(*p))
+                p++;
+
+        /* parse the hour-minute-second part */
+        for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
+            q = av_small_strptime(p, time_fmt[i], &dt);
+            if (q)
+                break;
+        }
+    } else {
+        /* parse timestr as a duration */
+        if (p[0] == '-') {
+            negative = 1;
+            ++p;
+        }
+        /* parse timestr as HH:MM:SS */
+        q = av_small_strptime(p, "%J:%M:%S", &dt);
+        if (!q) {
+            /* parse timestr as MM:SS */
+            q = av_small_strptime(p, "%M:%S", &dt);
+            dt.tm_hour = 0;
+        }
+        if (!q) {
+            char *o;
+            /* parse timestr as S+ */
+            errno = 0;
+            t = strtoll(p, &o, 10);
+            if (o == p) /* the parsing didn't succeed */
+                return AVERROR(EINVAL);
+            if (errno == ERANGE)
+                return AVERROR(ERANGE);
+            q = o;
+        } else {
+            t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
+        }
+    }
+
+    /* Now we have all the fields that we can get */
+    if (!q)
+        return AVERROR(EINVAL);
+
+    /* parse the .m... part */
+    if (*q == '.') {
+        int n;
+        q++;
+        for (n = 100000; n >= 1; n /= 10, q++) {
+            if (!av_isdigit(*q))
+                break;
+            microseconds += n * (*q - '0');
+        }
+        while (av_isdigit(*q))
+            q++;
+    }
+
+    if (duration) {
+        if (q[0] == 'm' && q[1] == 's') {
+            suffix = 1000;
+            microseconds /= 1000;
+            q += 2;
+        } else if (q[0] == 'u' && q[1] == 's') {
+            suffix = 1;
+            microseconds = 0;
+            q += 2;
+        } else if (*q == 's')
+            q++;
+    } else {
+        int is_utc = *q == 'Z' || *q == 'z';
+        int tzoffset = 0;
+        q += is_utc;
+        if (!today && !is_utc && (*q == '+' || *q == '-')) {
+            struct tm tz = { 0 };
+            int sign = (*q == '+' ? -1 : 1);
+            q++;
+            p = q;
+            for (i = 0; i < FF_ARRAY_ELEMS(tz_fmt); i++) {
+                q = av_small_strptime(p, tz_fmt[i], &tz);
+                if (q)
+                    break;
+            }
+            if (!q)
+                return AVERROR(EINVAL);
+            tzoffset = sign * (tz.tm_hour * 60 + tz.tm_min) * 60;
+            is_utc = 1;
+        }
+        if (today) { /* fill in today's date */
+            struct tm dt2 = is_utc ? *gmtime_r(&now, &tmbuf) : *localtime_r(&now, &tmbuf);
+            dt2.tm_hour = dt.tm_hour;
+            dt2.tm_min  = dt.tm_min;
+            dt2.tm_sec  = dt.tm_sec;
+            dt = dt2;
+        }
+        dt.tm_isdst = is_utc ? 0 : -1;
+        t = is_utc ? av_timegm(&dt) : mktime(&dt);
+        t += tzoffset;
+    }
+
+    /* Check that we are at the end of the string */
+    if (*q)
+        return AVERROR(EINVAL);
+
+    if (INT64_MAX / suffix < t || t < INT64_MIN / suffix)
+        return AVERROR(ERANGE);
+    t *= suffix;
+    if (INT64_MAX - microseconds < t)
+        return AVERROR(ERANGE);
+    t += microseconds;
+    if (t == INT64_MIN && negative)
+        return AVERROR(ERANGE);
+    *timeval = negative ? -t : t;
+    return 0;
+}
+
+int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
+{
+    const char *p;
+    char tag[128], *q;
+
+    p = info;
+    if (*p == '?')
+        p++;
+    for(;;) {
+        q = tag;
+        while (*p != '\0' && *p != '=' && *p != '&') {
+            if ((q - tag) < sizeof(tag) - 1)
+                *q++ = *p;
+            p++;
+        }
+        *q = '\0';
+        q = arg;
+        if (*p == '=') {
+            p++;
+            while (*p != '&' && *p != '\0') {
+                if ((q - arg) < arg_size - 1) {
+                    if (*p == '+')
+                        *q++ = ' ';
+                    else
+                        *q++ = *p;
+                }
+                p++;
+            }
+        }
+        *q = '\0';
+        if (!strcmp(tag, tag1))
+            return 1;
+        if (*p != '&')
+            break;
+        p++;
+    }
+    return 0;
+}