Function merge_ssa

libhb/sync.c:2559–2616

}

static hb_buffer_t * merge_ssa(hb_buffer_t *a, hb_buffer_t *b)
{
    int len, ii;
    char *text;
    hb_buffer_t *buf;

    if (a == NULL && b == NULL)
    {
        return NULL;
    }
    if (a == NULL)
    {
        return hb_buffer_dup(b);
    }
    if (b == NULL)
    {
        return hb_buffer_dup(a);
    }

    buf = hb_buffer_init(a->size + b->size);
    buf->s = a->s;

    // Find the text in the second SSA sub
    text = (char*)b->data;
    for (ii = 0; ii < 8; ii++)
    {
        text = strchr(text, ',');
        if (text == NULL)
            break;
        text++;
    }
    if (text != NULL)
    {
        // Strip trailing CR and/or LF
        len = strlen((char*)a->data);
        if (len > 0 && a->data[len - 1] == '\n')
        {
            a->data[len - 1] = 0;
            len--;
            if (len > 0 && a->data[len - 1] == '\r')
            {
                a->data[len - 1] = 0;
            }
        }
        // Text subtitles are SSA internally.  Use SSA newline code
        // and force style reset at beginning of new line.
        len = snprintf((char*)buf->data, buf->size, "%s\\N{\\r}%s", a->data, text);
        if (len >= 0)
            buf->size = len + 1;
    }
    else
    {
        memcpy(buf->data, a->data, a->size);
        buf->size = a->size;
    }

    return buf;
}