Function ff_ass_split_override_codes

libavcodec/ass_split.c:483–576

int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
                                const char *buf)
{
    const char *text = NULL;
    char new_line[2];
    int text_len = 0;

    while (buf && *buf) {
        if (text && callbacks->text &&
            (sscanf(buf, "\\%1[nN]", new_line) == 1 ||
             !strncmp(buf, "{\\", 2))) {
            callbacks->text(priv, text, text_len);
            text = NULL;
        }
        if (sscanf(buf, "\\%1[nN]", new_line) == 1) {
            if (callbacks->new_line)
                callbacks->new_line(priv, new_line[0] == 'N');
            buf += 2;
        } else if (!strncmp(buf, "{\\", 2)) {
            buf++;
            while (*buf == '\\') {
                char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0};
                unsigned int color = 0xFFFFFFFF;
                int len, size = -1, an = -1, alpha = -1;
                int x1, y1, x2, y2, t1 = -1, t2 = -1;
                if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) {
                    int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1;
                    len += close != -1;
                    if (callbacks->style)
                        callbacks->style(priv, style[0], close);
                } else if (sscanf(buf, "\\c%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\c&H%X&%1[\\}]%n", &color, sep, &len) > 1 ||
                           sscanf(buf, "\\%1[1234]c%1[\\}]%n", c_num, sep, &len) > 1 ||
                           sscanf(buf, "\\%1[1234]c&H%X&%1[\\}]%n", c_num, &color, sep, &len) > 2) {
                    if (callbacks->color)
                        callbacks->color(priv, color, c_num[0] - '0');
                } else if (sscanf(buf, "\\alpha%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\alpha&H%2X&%1[\\}]%n", &alpha, sep, &len) > 1 ||
                           sscanf(buf, "\\%1[1234]a%1[\\}]%n", c_num, sep, &len) > 1 ||
                           sscanf(buf, "\\%1[1234]a&H%2X&%1[\\}]%n", c_num, &alpha, sep, &len) > 2) {
                    if (callbacks->alpha)
                        callbacks->alpha(priv, alpha, c_num[0] - '0');
                } else if (sscanf(buf, "\\fn%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\fn%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) {
                    if (callbacks->font_name)
                        callbacks->font_name(priv, tmp[0] ? tmp : NULL);
                } else if (sscanf(buf, "\\fs%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\fs%u%1[\\}]%n", &size, sep, &len) > 1) {
                    if (callbacks->font_size)
                        callbacks->font_size(priv, size);
                } else if (sscanf(buf, "\\a%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\a%2u%1[\\}]%n", &an, sep, &len) > 1 ||
                           sscanf(buf, "\\an%1[\\}]%n", sep, &len) > 0 ||
                           sscanf(buf, "\\an%1u%1[\\}]%n", &an, sep, &len) > 1) {
                    if (an != -1 && buf[2] != 'n')
                        an = (an&3) + (an&4 ? 6 : an&8 ? 3 : 0);
                    if (callbacks->alignment)
                        callbacks->alignment(priv, an);